| Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended | ||
|---|---|---|---|
| Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | |
| Income Tax Expense (Benefit) | |||
| Federal | $ 13 | $ (1) | $ (14) | 
| State and local | (62) | (24) | 13 | 
| Foreign | (2) | (21) | (8) | 
| Current Income Tax Expense (Benefit) | (51) | (46) | (9) | 
| Federal | 12 | (139) | (228) | 
| State and local | (1) | (20) | (2) | 
| Foreign | 84 | 39 | 63 | 
| Deferred Income Tax Expense (Benefit), Total | 95 | (120) | (167) | 
| Income tax benefit (expense) | 44 | (166) | (176) | 
| Earnings (loss) from continuing operations before income taxes | (1,435) | 513 | 1,041 | 
| Domestic | |||
| Income Tax Expense (Benefit) | |||
| Earnings (loss) from continuing operations before income taxes | (969) | 583 | 1,140 | 
| Foreign | |||
| Income Tax Expense (Benefit) | |||
| Earnings (loss) from continuing operations before income taxes | $ (466) | $ (70) | $ (99) | 
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- References No definition available. 
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- Definition Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
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- Definition Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
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- Definition Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Details 
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- Details 
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