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This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' 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Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.","units":{"USD":[{"end":"2019-12-31","val":0,"accn":"0000731766-20-000026","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-06","frame":"CY2019Q4I"},{"end":"2020-03-31","val":10000000000,"accn":"0000731766-20-000026","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-06","frame":"CY2020Q1I"}]}},"LineOfCreditFacilityCurrentBorrowingCapacity":{"label":"Line of Credit Facility, Current Borrowing Capacity","description":"Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.","units":{"USD":[{"end":"2010-06-30","val":2500000000,"accn":"0001193125-10-179226","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"}]}},"LineOfCreditFacilityMaximumBorrowingCapacity":{"label":"Line of Credit Facility, Maximum Borrowing Capacity","description":"Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.","units":{"USD":[{"end":"2012-12-31","val":4000000000,"accn":"0000731766-13-000005","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-07","frame":"CY2012Q4I"},{"end":"2013-03-31","val":4000000000,"accn":"0000731766-13-000014","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-06","frame":"CY2013Q1I"}]}},"LitigationSettlementExpense":{"label":"Litigation Settlement, Expense","description":"Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.","units":{"USD":[{"start":"2008-01-01","end":"2008-12-31","val":350000000,"accn":"0001193125-11-030615","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-10","frame":"CY2008"}]}},"LongTermDebtCurrent":{"label":"Long-term Debt, Current Maturities","description":"Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. 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Excludes capital lease 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This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' 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