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It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents.","units":{"USD":[{"end":"2016-06-30","val":133100000,"accn":"0001144204-17-040068","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-03","frame":"CY2016Q2I"},{"end":"2017-06-30","val":123700000,"accn":"0001144204-17-040068","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-03","frame":"CY2017Q2I"}]}},"CashAndCashEquivalentsPeriodIncreaseDecrease":{"label":"Cash and Cash Equivalents, Period Increase (Decrease)","description":"Amount of increase (decrease) in cash and cash equivalents. 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Alternate caption: Proceeds from Advances from 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Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.","units":{"USD":[{"start":"2014-01-01","end":"2014-12-31","val":2799400000,"accn":"0001144204-17-009660","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-17","frame":"CY2014"},{"start":"2015-01-01","end":"2015-06-30","val":1027500000,"accn":"0001144204-16-115109","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-07-29"},{"start":"2015-01-01","end":"2015-09-30","val":1632700000,"accn":"0001144204-16-130398","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-10-31"},{"start":"2015-01-01","end":"2015-12-31","val":2154300000,"accn":"0001144204-17-009660","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-17","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":282000000,"accn":"0001144204-17-026047","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-10","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":499600000,"accn":"0001144204-16-115109","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-07-29"},{"start":"2016-01-01","end":"2016-06-30","val":499600000,"accn":"0001144204-17-040068","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-03"},{"start":"2016-01-01","end":"2016-09-30","val":696600000,"accn":"0001144204-16-130398","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-10-31"},{"start":"2016-01-01","end":"2016-09-30","val":655400000,"accn":"0000880285-17-000006","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-02"},{"start":"2016-01-01","end":"2016-12-31","val":852600000,"accn":"0001144204-17-009660","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-17","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":97600000,"accn":"0001144204-17-026047","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-10","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":207300000,"accn":"0001144204-17-040068","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-03"},{"start":"2017-01-01","end":"2017-09-30","val":417600000,"accn":"0000880285-17-000006","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-02"}]}},"PropertyPlantAndEquipmentNet":{"label":"Property, Plant and Equipment, Net","description":"Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and 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Plant and Equipment, Useful Life, Average (Deprecated 2012-01-31)","description":"The average useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.","units":{"years":[{"start":"2011-01-01","end":"2011-06-30","val":29,"accn":"0001193125-12-325954","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-07-31"},{"start":"2011-01-01","end":"2011-06-30","val":29,"accn":"0001193125-12-201391","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-01"},{"start":"2011-01-01","end":"2011-06-30","val":29,"accn":"0001193125-12-112218","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13"},{"start":"2011-10-01","end":"2011-12-31","val":36,"accn":"0001193125-12-112218","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-13","frame":"CY2011Q4"},{"start":"2012-01-01","end":"2012-03-31","val":36,"accn":"0001193125-12-201391","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-01","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":36,"accn":"0001193125-12-325954","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-07-31"}]}},"PurchaseObligation":{"label":"Purchase Obligation","description":"Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.","units":{"USD":[{"end":"2013-12-31","val":3829800000,"accn":"0001193125-14-056516","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-18","frame":"CY2013Q4I"},{"end":"2015-12-31","val":260000000,"accn":"0000880285-18-000006","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-16","frame":"CY2015Q4I"},{"end":"2016-12-31","val":947000000,"accn":"0000880285-18-000006","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-16","frame":"CY2016Q4I"},{"end":"2017-12-31","val":341000000,"accn":"0000880285-18-000006","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-16","frame":"CY2017Q4I"}]}},"PurchaseObligationDueAfterFifthYear":{"label":"Purchase Obligation, to be Paid, after Year Five","description":"Amount of purchase arrangement to be paid after fifth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2013-12-31","val":1063400000,"accn":"0001193125-14-056516","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-18","frame":"CY2013Q4I"}]}},"PurchaseObligationDueInFifthYear":{"label":"Purchase Obligation, to be Paid, Year Five","description":"Amount of purchase arrangement to be paid in fifth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2013-12-31","val":211100000,"accn":"0001193125-14-056516","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-18","frame":"CY2013Q4I"}]}},"PurchaseObligationDueInFourthYear":{"label":"Purchase Obligation, to be Paid, Year Four","description":"Amount of purchase arrangement to be paid in fourth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2013-12-31","val":198100000,"accn":"0001193125-14-056516","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-18","frame":"CY2013Q4I"}]}},"PurchaseObligationDueInNextTwelveMonths":{"label":"Purchase Obligation, to be Paid, Year One","description":"Amount of purchase arrangement to be paid in next fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2013-12-31","val":2045900000,"accn":"0001193125-14-056516","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-18","frame":"CY2013Q4I"}]}},"PurchaseObligationDueInSecondYear":{"label":"Purchase Obligation, to be Paid, Year Two","description":"Amount of purchase arrangement to be paid in second fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2013-12-31","val":162000000,"accn":"0001193125-14-056516","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-18","frame":"CY2013Q4I"}]}},"PurchaseObligationDueInThirdYear":{"label":"Purchase Obligation, to be Paid, Year Three","description":"Amount of purchase arrangement to be paid in third fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2013-12-31","val":149300000,"accn":"0001193125-14-056516","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-18","frame":"CY2013Q4I"}]}},"QualitativeAndQuantitativeInformationAssetOrLiabilityTransferorsContinuingInvolvementSecuritizationOrAssetbackedFinancingPrincipalAmountOutstandingDerecognizedAmount":{"label":"Qualitative and Quantitative Information, Transferor's Continuing Involvement, Principal Amount Outstanding, Derecognized Amount (Deprecated 2014-01-31)","description":"This includes only the derecognized portion of the total principal amount of financial assets which have been either securitized, used in an asset-backed financing arrangement, or similar transfers which are accounted for as sales and in which the transferor has continuing involvement with the assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets).","units":{"USD":[{"end":"2013-06-30","val":213000000,"accn":"0001193125-13-310928","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-07-31","frame":"CY2013Q2I"}]}},"QualitativeAndQuantitativeInformationAssetsOrLiabilitiesForTransferorsContinuingInvolvementInSecuritizationOrAssetbackedFinancingArrangementPrincipalAmountsOutstanding":{"label":"Qualitative and Quantitative Information, Transferor's Continuing Involvement, Principal Amount Outstanding (Deprecated 2014-01-31)","description":"The total principal outstanding of financial assets transferred in a securitization, asset-backed financing arrangement, or similar transfer that has been accounted for as sales and in which the transferor continues to have involvement, including both the derecognized and recognized portion of such transferred 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