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Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.","units":{"USD":[{"end":"2009-12-31","val":25431000,"accn":"0001193125-11-045694","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-25","frame":"CY2009Q4I"},{"end":"2009-12-31","val":25431000,"accn":"0001193125-10-250136","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-05"},{"end":"2009-12-31","val":25431000,"accn":"0001193125-10-181292","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-06"},{"end":"2010-06-30","val":102718000,"accn":"0001193125-10-181292","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-06","frame":"CY2010Q2I"},{"end":"2010-09-30","val":190325000,"accn":"0001193125-10-250136","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":98946000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24","frame":"CY2010Q4I"},{"end":"2010-12-31","val":98946000,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04"},{"end":"2010-12-31","val":98946000,"accn":"0001193125-11-216393","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09"},{"end":"2010-12-31","val":98946000,"accn":"0001193125-11-130627","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-06"},{"end":"2010-12-31","val":98946000,"accn":"0001193125-11-045694","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-25"},{"end":"2011-03-31","val":89233000,"accn":"0001193125-11-130627","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-06","frame":"CY2011Q1I"},{"end":"2011-06-30","val":132218000,"accn":"0001193125-11-216393","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09","frame":"CY2011Q2I"},{"end":"2011-09-30","val":173025000,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04","frame":"CY2011Q3I"},{"end":"2011-12-31","val":166957000,"accn":"0001193125-12-224772","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-10"},{"end":"2011-12-31","val":166957000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"end":"2011-12-31","val":166957000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011Q4I"},{"end":"2011-12-31","val":166957000,"accn":"0001141719-12-000006","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-09"},{"end":"2011-12-31","val":166957000,"accn":"0001141719-12-000003","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08"},{"end":"2012-03-31","val":185146000,"accn":"0001193125-12-224772","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-10","frame":"CY2012Q1I"},{"end":"2012-06-30","val":202229000,"accn":"0001141719-12-000003","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08","frame":"CY2012Q2I"},{"end":"2012-09-30","val":265232000,"accn":"0001141719-12-000006","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-09","frame":"CY2012Q3I"},{"end":"2012-12-31","val":244172000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2012Q4I"},{"end":"2012-12-31","val":244172000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28"},{"end":"2013-03-31","val":192753000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2013Q1I"}]}},"AcquiredIndefiniteLivedIntangibleAssetAmount":{"label":"Acquired Indefinite-lived Intangible Asset, Amount (Deprecated 2013-01-31)","description":"The aggregate cost of a major indefinite-lived intangible asset class acquired, during the period, either individually or as part of a group of assets (in either an asset acquisition or business combination).","units":{"USD":[{"end":"2010-12-31","val":6200000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24","frame":"CY2010Q4I"}]}},"AdditionalPaidInCapital":{"label":"Additional Paid in Capital","description":"Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.","units":{"USD":[{"end":"2009-12-31","val":752309000,"accn":"0001193125-11-045694","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-25","frame":"CY2009Q4I"},{"end":"2009-12-31","val":752309000,"accn":"0001193125-10-250136","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-05"},{"end":"2009-12-31","val":752309000,"accn":"0001193125-10-181292","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-06"},{"end":"2010-06-30","val":2157700000,"accn":"0001193125-10-181292","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-06","frame":"CY2010Q2I"},{"end":"2010-09-30","val":2113732000,"accn":"0001193125-10-250136","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":2026045000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24","frame":"CY2010Q4I"},{"end":"2010-12-31","val":2026045000,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04"},{"end":"2010-12-31","val":2026045000,"accn":"0001193125-11-216393","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09"},{"end":"2010-12-31","val":2026045000,"accn":"0001193125-11-130627","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-06"},{"end":"2010-12-31","val":2026045000,"accn":"0001193125-11-045694","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-25"},{"end":"2011-03-31","val":1905144000,"accn":"0001193125-11-130627","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-06","frame":"CY2011Q1I"},{"end":"2011-06-30","val":1911979000,"accn":"0001193125-11-216393","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09","frame":"CY2011Q2I"},{"end":"2011-09-30","val":1890763000,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04","frame":"CY2011Q3I"},{"end":"2011-12-31","val":1847034000,"accn":"0001193125-12-224772","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-10"},{"end":"2011-12-31","val":1847034000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"end":"2011-12-31","val":1847034000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011Q4I"},{"end":"2011-12-31","val":1847034000,"accn":"0001141719-12-000006","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-09"},{"end":"2011-12-31","val":1847034000,"accn":"0001141719-12-000003","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08"},{"end":"2012-03-31","val":1807287000,"accn":"0001193125-12-224772","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-10","frame":"CY2012Q1I"},{"end":"2012-06-30","val":1729311000,"accn":"0001141719-12-000003","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08","frame":"CY2012Q2I"},{"end":"2012-09-30","val":1715748000,"accn":"0001141719-12-000006","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-09","frame":"CY2012Q3I"},{"end":"2012-12-31","val":1721241000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2012Q4I"},{"end":"2012-12-31","val":1721241000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28"},{"end":"2013-03-31","val":1724261000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2013Q1I"}]}},"AlternativeInvestmentsFairValueDisclosure":{"label":"Alternative Investment, Fair Value Disclosure (Deprecated 2018-01-31)","description":"Fair value of investment in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes measurement of net asset value as estimate of fair value.","units":{"USD":[{"end":"2010-12-31","val":294257000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24","frame":"CY2010Q4I"},{"end":"2010-12-31","val":294257000,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04"},{"end":"2011-09-30","val":275576000,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04","frame":"CY2011Q3I"},{"end":"2011-12-31","val":249971000,"accn":"0001193125-12-224772","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-10"},{"end":"2011-12-31","val":249971000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"end":"2011-12-31","val":249971000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011Q4I"},{"end":"2011-12-31","val":249971000,"accn":"0001141719-12-000006","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-09"},{"end":"2011-12-31","val":249971000,"accn":"0001141719-12-000003","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08"},{"end":"2012-03-31","val":224282000,"accn":"0001193125-12-224772","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-10","frame":"CY2012Q1I"},{"end":"2012-06-30","val":252159000,"accn":"0001141719-12-000003","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08","frame":"CY2012Q2I"},{"end":"2012-09-30","val":265468000,"accn":"0001141719-12-000006","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-09","frame":"CY2012Q3I"},{"end":"2012-12-31","val":293193000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2012Q4I"},{"end":"2012-12-31","val":293193000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28"},{"end":"2013-03-31","val":290861000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2013Q1I"}]}},"AmortizationOfIntangibleAssets":{"label":"Amortization of Intangible Assets","description":"The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":1810000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":1965000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"start":"2011-01-01","end":"2011-12-31","val":1965000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":1360000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012"}]}},"AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries":{"label":"Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries","description":"Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.","units":{"USD":[{"end":"2011-12-31","val":2380556000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011Q4I"},{"end":"2012-12-31","val":2223597000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012Q4I"}]}},"AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount":{"label":"Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount","description":"Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.","units":{"shares":[{"start":"2010-01-01","end":"2010-06-30","val":2326712,"accn":"0001193125-11-216393","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09"},{"start":"2010-04-01","end":"2010-06-30","val":3538067,"accn":"0001193125-11-216393","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09","frame":"CY2010Q2"},{"start":"2010-01-01","end":"2010-09-30","val":2749509,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":3595104,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04","frame":"CY2010Q3"},{"start":"2011-04-01","end":"2011-06-30","val":2910788,"accn":"0001193125-11-216393","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":3294340,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04"},{"start":"2011-07-01","end":"2011-09-30","val":3501755,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04","frame":"CY2011Q3"}]}},"Assets":{"label":"Assets","description":"Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.","units":{"USD":[{"end":"2009-12-31","val":7339746000,"accn":"0001193125-11-045694","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-25","frame":"CY2009Q4I"},{"end":"2009-12-31","val":7339746000,"accn":"0001193125-10-250136","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-05"},{"end":"2009-12-31","val":7339746000,"accn":"0001193125-10-181292","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-06"},{"end":"2010-06-30","val":9974936000,"accn":"0001193125-10-181292","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-06","frame":"CY2010Q2I"},{"end":"2010-09-30","val":10118934000,"accn":"0001193125-10-250136","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-05","frame":"CY2010Q3I"},{"end":"2010-12-31","val":9917288000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24","frame":"CY2010Q4I"},{"end":"2010-12-31","val":9917288000,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04"},{"end":"2010-12-31","val":9917288000,"accn":"0001193125-11-216393","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09"},{"end":"2010-12-31","val":9917288000,"accn":"0001193125-11-130627","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-06"},{"end":"2010-12-31","val":9917288000,"accn":"0001193125-11-045694","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-25"},{"end":"2011-03-31","val":10250379000,"accn":"0001193125-11-130627","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-06","frame":"CY2011Q1I"},{"end":"2011-06-30","val":10497364000,"accn":"0001193125-11-216393","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09","frame":"CY2011Q2I"},{"end":"2011-09-30","val":10472330000,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04","frame":"CY2011Q3I"},{"end":"2011-12-31","val":10185847000,"accn":"0001193125-12-224772","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-10"},{"end":"2011-12-31","val":10185847000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"end":"2011-12-31","val":10185847000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011Q4I"},{"end":"2011-12-31","val":10185847000,"accn":"0001141719-12-000006","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-09"},{"end":"2011-12-31","val":10185847000,"accn":"0001141719-12-000003","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08"},{"end":"2012-03-31","val":10575778000,"accn":"0001193125-12-224772","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-10","frame":"CY2012Q1I"},{"end":"2012-06-30","val":10696586000,"accn":"0001141719-12-000003","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08","frame":"CY2012Q2I"},{"end":"2012-09-30","val":10734010000,"accn":"0001141719-12-000006","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-09","frame":"CY2012Q3I"},{"end":"2012-12-31","val":10677078000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2012Q4I"},{"end":"2012-12-31","val":10677078000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28"},{"end":"2013-03-31","val":10834172000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2013Q1I"}]}},"AssumedPremiumsEarnedLife":{"label":"Assumed Premiums Earned, Life (Deprecated 2013-01-31)","description":"Premiums earned for all life insurance assumed from other insurers as a result of reinsurance arrangements.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":43755000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":4935000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":4935000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":3356000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"start":"2011-01-01","end":"2011-12-31","val":3356000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":2848000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012"}]}},"AssumedPremiumsEarnedPropertyAndCasualty":{"label":"Assumed 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arrangements.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":554807000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":804870000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":804870000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":1068511000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"start":"2011-01-01","end":"2011-12-31","val":1068511000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":1094315000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012"}]}},"AssumedPremiumsWrittenLife":{"label":"Assumed Premiums Written, Life (Deprecated 2013-01-31)","description":"Premiums assumed for all life insurance assumed from other insurers as a result of reinsurance 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Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.","units":{"USD":[{"start":"2010-01-01","end":"2010-09-30","val":27631000,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04"},{"start":"2010-07-01","end":"2010-09-30","val":550000,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":27631000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":27631000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2010"},{"start":"2012-01-01","end":"2012-03-31","val":0,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2012Q1"},{"start":"2013-01-01","end":"2013-03-31","val":626000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2013Q1"}]}},"BusinessCombinationBargainPurchaseGainRecognizedAmount":{"label":"Business Combination, Bargain Purchase, Gain Recognized, Amount","description":"In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity.","units":{"USD":[{"start":"2009-01-01","end":"2009-12-31","val":0,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24","frame":"CY2009"},{"start":"2010-01-01","end":"2010-06-30","val":95788000,"accn":"0001193125-11-216393","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09"},{"start":"2010-01-01","end":"2010-06-30","val":95788000,"accn":"0001193125-10-181292","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-06"},{"start":"2010-01-01","end":"2010-09-30","val":95788000,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":95788000,"accn":"0001193125-10-250136","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":95788000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":95788000,"accn":"0001193125-11-045694","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-25"},{"start":"2010-01-01","end":"2010-12-31","val":95788000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2010"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012"}]}},"CashAcquiredFromAcquisition":{"label":"Cash Acquired from Acquisition","description":"The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":446819000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012"}]}},"CashAndCashEquivalentsAtCarryingValue":{"label":"Cash and Cash Equivalents, at Carrying Value","description":"Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. 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012,"fp":"FY","form":"10-K","filed":"2013-02-28"},{"end":"2011-12-31","val":469477000,"accn":"0001141719-12-000006","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-09"},{"end":"2011-12-31","val":922844000,"accn":"0001141719-12-000003","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08"},{"end":"2012-03-31","val":844743000,"accn":"0001193125-12-224772","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-10"},{"end":"2012-03-31","val":394514000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2012Q1I"},{"end":"2012-06-30","val":763957000,"accn":"0001141719-12-000003","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08","frame":"CY2012Q2I"},{"end":"2012-09-30","val":405809000,"accn":"0001141719-12-000006","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-09","frame":"CY2012Q3I"},{"end":"2012-12-31","val":440298000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2012Q4I"},{"end":"2012-12-31","val":440298000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28"},{"end":"2013-03-31","val":958108000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2013Q1I"}]}},"CashAndCashEquivalentsPeriodIncreaseDecrease":{"label":"Cash and Cash Equivalents, Period Increase (Decrease)","description":"Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":551748000,"accn":"0001193125-11-045694","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-25","frame":"CY2008"},{"start":"2009-01-01","end":"2009-06-30","val":58774000,"accn":"0001193125-10-181292","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-06"},{"start":"2009-01-01","end":"2009-09-30","val":106607000,"accn":"0001193125-10-250136","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-05"},{"start":"2009-01-01","end":"2009-12-31","val":-247126000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24","frame":"CY2009"},{"start":"2009-01-01","end":"2009-12-31","val":-247126000,"accn":"0001193125-11-045694","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-25"},{"start":"2010-01-01","end":"2010-03-31","val":-12032000,"accn":"0001193125-11-130627","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-06","frame":"CY2010Q1"},{"start":"2010-01-01","end":"2010-06-30","val":39406000,"accn":"0001193125-11-216393","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09"},{"start":"2010-01-01","end":"2010-06-30","val":39406000,"accn":"0001193125-10-181292","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-06"},{"start":"2010-01-01","end":"2010-09-30","val":223474000,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04"},{"start":"2010-01-01","end":"2010-09-30","val":223474000,"accn":"0001193125-10-250136","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-11-05"},{"start":"2010-01-01","end":"2010-12-31","val":203328000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"start":"2010-01-01","end":"2010-12-31","val":203328000,"accn":"0001193125-11-045694","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-25"},{"start":"2010-01-01","end":"2010-12-31","val":77801000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":95445000,"accn":"0001193125-12-224772","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-10","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-03-31","val":95445000,"accn":"0001193125-11-130627","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-05-06"},{"start":"2011-01-01","end":"2011-06-30","val":81451000,"accn":"0001193125-11-216393","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-09"},{"start":"2011-01-01","end":"2011-06-30","val":81451000,"accn":"0001141719-12-000003","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08"},{"start":"2011-01-01","end":"2011-09-30","val":-35631000,"accn":"0001193125-11-297324","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-04"},{"start":"2011-01-01","end":"2011-09-30","val":-133796000,"accn":"0001141719-12-000006","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-09"},{"start":"2011-01-01","end":"2011-12-31","val":17238000,"accn":"0001193125-12-077441","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-24"},{"start":"2011-01-01","end":"2011-12-31","val":-86220000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":-78101000,"accn":"0001193125-12-224772","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-10"},{"start":"2012-01-01","end":"2012-03-31","val":-74963000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":-158887000,"accn":"0001141719-12-000003","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08"},{"start":"2012-01-01","end":"2012-09-30","val":-63668000,"accn":"0001141719-12-000006","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-09"},{"start":"2012-01-01","end":"2012-12-31","val":-29179000,"accn":"0001141719-13-000003","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":517810000,"accn":"0001141719-13-000005","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-04-30","frame":"CY2013Q1"}]}},"CededPremiumsEarnedLife":{"label":"Ceded 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