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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 20, 2018
Income Tax Disclosures [Line Items] |  |  |
Effective Income Tax Rate Reconciliation, Percent | 23.00% | 43.00% |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 35.00% |
Gain (Loss) on Disposition of Business | $ (788) | $ 0 |
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 |  |
Masinloc Subsidiary [Member] |  |  |
Income Tax Disclosures [Line Items] |  |  |
Disposal Group Not Discontinued Operation Ownership Interest Sold |  |  | 51.00%

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