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Income Taxes, Unrecognized Tax Benefits Recognized in Balance Sheet (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Amounts Recognized in Balance Sheets for Uncertain Tax Positions |  |
Other long-term liabilities and Deferred tax liabilities | $ (723) | $ (465)
Uncertain tax position liabilities presented in our balance sheets | (744) | (498)
Income Taxes Payable [Member] |  |
Amounts Recognized in Balance Sheets for Uncertain Tax Positions |  |
Income taxes payable | 0 | (7)
Other Noncurrent Liabilities [Member] |  |
Amounts Recognized in Balance Sheets for Uncertain Tax Positions |  |
Other long-term liabilities and Deferred tax liabilities | (723) | (465)
Deferred Income Taxes [Member] |  |
Amounts Recognized in Balance Sheets for Uncertain Tax Positions |  |
Other long-term liabilities and Deferred tax liabilities | $ (21) | $ (26)

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- Definition Amount recognized for uncertainty in income taxes classified as current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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