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Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. 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":"2007-12-31","val":151000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2007Q4I"},{"end":"2007-12-31","val":151000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"},{"end":"2008-12-31","val":-356000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2008Q4I"},{"end":"2008-12-31","val":-356000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"},{"end":"2008-12-31","val":-356000000,"accn":"0001104659-10-017012","fy":2009,"fp":"FY","form":"40-F","filed":"2010-03-29"},{"end":"2009-12-31","val":55000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2009Q4I"},{"end":"2009-12-31","val":55000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"},{"end":"2009-12-31","val":55000000,"accn":"0001104659-10-017012","fy":2009,"fp":"FY","form":"40-F","filed":"2010-03-29"},{"end":"2010-12-31","val":531000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2010Q4I"},{"end":"2010-12-31","val":531000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"}]}},"AdditionalPaidInCapitalCommonStock":{"label":"Additional Paid in Capital, Common Stock","description":"Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. 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An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.","units":{"USD":[{"end":"2008-12-31","val":1036000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2008Q4I"},{"end":"2008-12-31","val":1036000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"},{"end":"2009-12-31","val":1207000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2009Q4I"},{"end":"2009-12-31","val":1207000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"},{"end":"2010-12-31","val":1527000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2010Q4I"},{"end":"2010-12-31","val":1527000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"}]}},"AssetRetirementObligationAccretionExpense":{"label":"Asset Retirement Obligation, Accretion Expense","description":"Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. 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Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.","units":{"USD":[{"end":"2008-12-31","val":24161000000,"accn":"0001104659-10-017012","fy":2009,"fp":"FY","form":"40-F","filed":"2010-03-29"},{"end":"2008-12-31","val":24161000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"},{"end":"2008-12-31","val":24161000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2008Q4I"},{"end":"2009-12-31","val":27075000000,"accn":"0001104659-10-017012","fy":2009,"fp":"FY","form":"40-F","filed":"2010-03-29"},{"end":"2009-12-31","val":27075000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"},{"end":"2009-12-31","val":27075000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2009Q4I"},{"end":"2010-12-31","val":33322000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"},{"end":"2010-12-31","val":33322000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2010Q4I"}]}},"AssetsCurrent":{"label":"Assets, Current","description":"Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). 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Excludes cash and cash equivalents within disposal group and discontinued operation.","units":{"USD":[{"end":"2006-12-31","val":3043000000,"accn":"0001104659-10-017012","fy":2009,"fp":"FY","form":"40-F","filed":"2010-03-29","frame":"CY2006Q4I"},{"end":"2007-12-31","val":2207000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2007Q4I"},{"end":"2007-12-31","val":2207000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"},{"end":"2007-12-31","val":2207000000,"accn":"0001104659-10-017012","fy":2009,"fp":"FY","form":"40-F","filed":"2010-03-29"},{"end":"2008-12-31","val":1437000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2008Q4I"},{"end":"2008-12-31","val":1437000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"},{"end":"2008-12-31","val":1437000000,"accn":"0001104659-10-017012","fy":2009,"fp":"FY","form":"40-F","filed":"2010-03-29"},{"end":"2009-12-31","val":2564000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2009Q4I"},{"end":"2009-12-31","val":2564000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"},{"end":"2009-12-31","val":2564000000,"accn":"0001104659-10-017012","fy":2009,"fp":"FY","form":"40-F","filed":"2010-03-29"},{"end":"2010-12-31","val":3968000000,"accn":"0001104659-11-018754","fy":2010,"fp":"FY","form":"40-F/A","filed":"2011-04-05","frame":"CY2010Q4I"},{"end":"2010-12-31","val":3968000000,"accn":"0001104659-11-017950","fy":2010,"fp":"FY","form":"40-F","filed":"2011-03-31"}]}},"CashAndCashEquivalentsPeriodIncreaseDecrease":{"label":"Cash and Cash Equivalents, Period Increase (Decrease)","description":"Amount of increase (decrease) in cash and cash equivalents. 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