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Income Taxes (Effective Income Tax Reconciliation) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Statutory Federal tax rate | 21.00% | 35.00% | 35.00%
State taxes, net of Federal tax benefit | 2.00% | (7.00%) | (18.00%)
Taxes on foreign earnings | 9.00% | 0.00% | (46.00%)
Valuation allowance | (2.00%) | 10.00% | 10.00%
Uncertain tax positions | 0.00% | 0.00% | 4.00%
Noncontrolling Interest on Buffalo Gap impairments | 0.00% | 0.00% | 31.00%
Change in tax law | 6.00% | 90.00% | 12.00%
Income Tax Expense (Benefit) | $ 708 | $ 990 | $ 32
Other—net | (1.00%) | 0.00% | (11.00%)
Effective tax rate | 35.00% | 128.00% | 17.00%
Non-US [Member] |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Income Tax Expense (Benefit) | $ 35 | $ 26 | $ 20

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- Definition The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to withholding tax reversals. + References No definition available. + Details
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