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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 20, 2018
Income Tax Disclosures [Line Items] |  |  |
One-time Transition Tax Rate | $ (115) | $ (231) |
Gain (Loss) on Disposition of Business | $ 4 | $ (788) |
Effective Income Tax Rate Reconciliation, Percent | 32.00% | 23.00% |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |
Proceeds from Divestiture of Businesses and Interests in Affiliates | $ 0 | $ 1,180 |
Masinloc Subsidiary [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |  |
Income Tax Disclosures [Line Items] |  |  |
Gain (Loss) on Disposition of Business |  | 777 |
Tax on gain (loss) on disposition of business |  | 155 |
Proceeds from Divestiture of Businesses and Interests in Affiliates |  | $ 1,050 |
Masinloc Subsidiary [Member] |  |  |
Income Tax Disclosures [Line Items] |  |  |
Disposal Group Not Discontinued Operation Ownership Interest Sold |  |  | 51.00%
Change in Accounting Estimate, Type [Domain] | UNITED STATES |  |  |
Income Tax Disclosures [Line Items] |  |  |
One-time Transition Tax Rate | $ (3) |  |

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