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Income Taxes (Narrative) (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2016
Income Tax Disclosures [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Percent |  | 0.06 |  |
Deferred Tax Liabilities, Undistributed Foreign Earnings | $ 0 |  |  |
Undistributed Earnings of Foreign Subsidiaries | $ 4,000,000,000 |  |  |
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent | 15.00% | 12.00% | 9.00% |
Effective tax rate | 44.00% | 35.00% | 35.00% |
Increase (decrease) in valuation allowance | $ (190,000,000) | $ (44,000,000) |  |
Valuation allowance | (634,000,000) | (824,000,000) |  |
Income tax expense | $ (216,000,000) | $ (352,000,000) | $ (708,000,000) |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 21.00% | 21.00% |
Tax benefits related to tax status of operations in countries subject to reduced tax rates per share (in dollars per share) | $ 0.03 | $ 0.02 | $ 0.04 |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued: |  |  |  |
Interest on income taxes accrued | $ 1,000,000 | $ 2,000,000 |  |
Unrecognized Tax Benefits, Income Tax Penalties Accrued | 0 | 0 |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense: |  |  |  |
Unrecognized Tax Benefits, Income Tax Penalties Expense | 0 | 0 | $ 0 |
Uncertain Tax Positions Additional Disclosures: |  |  |  |
Unrecognized tax benefits | 458,000,000 | 465,000,000 | 463,000,000 | $ 348,000,000
Unrecognized tax benefits that would impact effective tax rate | 439,000,000 | 448,000,000 | 446,000,000 |
Unrecognized tax benefits that would impact effective tax rate portion with attributes warranting full valuation allowance | 33,000,000 |  |  |
Unrecognized Tax benefits Anticipated To Result In Ne Decrease of Unrecognized Tax Benefits WIthin 12 Months of Balance Sheet Date Minimum | 0 |  |  |
Unrecognized tax benefits anticipated to result in net decrease of unrecognized tax benefits within 12 months, maximum | 10,000,000 |  |  |
Federal |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Operating loss carryforward | 2,100,000,000 |  |  |
Foreign Tax Authority |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Operating loss carryforward | 2,000,000,000.0 |  |  |
State and Local Jurisdiction |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Operating loss carryforward | 7,300,000,000 |  |  |
General Business Tax Credit Carryforward |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Tax credit carryforward | 66,000,000 |  |  |
Foreign Jurisdictions |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Tax credit carryforward | 14,000,000 |  |  |
2021 Expiration | Foreign Jurisdictions |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Tax credit carryforward | 13,000,000 |  |  |
Non-US [Member] |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Income tax expense | (33,000,000) | (26,000,000) | (35,000,000) |
VIET NAM |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Income tax expense | $ (16,000,000) | $ (13,000,000) | $ (19,000,000) |
Tax benefits related to tax status of operations in countries subject to reduced tax rates per share (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.01 |
Earliest Tax Year | Federal |  |  |  |
Uncertain Tax Positions Additional Disclosures: |  |  |  |
Operating Loss Carryforwards, Limitations on Use | 950 million |  |  |
Earliest Tax Year | General Business Tax Credit Carryforward |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Tax credit carryforward | $ 16,000,000 |  |  |
Latest Tax Year | Federal |  |  |  |
Uncertain Tax Positions Additional Disclosures: |  |  |  |
Operating Loss Carryforwards, Limitations on Use | 1.2 billion |  |  |
Latest Tax Year | General Business Tax Credit Carryforward |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Tax credit carryforward | $ 50,000,000 |  |  |
Guacolda Affiliate [Member] |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent | (1.00%) |  |  |
UNITED STATES |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Income Tax Expense | $ 124,000,000 |  |  |
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Percent |  | 0.09 |  |
Tax Cuts and Jobs Act, Income Tax Expense (Benefit) |  | $ 194,000,000 |  |
Effective tax rate | 35.00% |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |  |
Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit) |  | $ 77,000,000 |  |
Uncertain Tax Positions Additional Disclosures: |  |  |  |
Unrecognized tax benefits that would impact effective tax rate | $ 161,000,000 |  |  |

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