Summary of significant Accounting Policies - New Pronouncements (Details) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Summary of Significant Accounting Policies [Abstract] | ||
| Deferred income tax liabilities | $ 3,636 | $ 3,217 |
| Other assets, at cost, net of accumulated amortization | 32 | 39 |
| Long-term debt | $ 7,166 | $ 7,481 |
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- References No definition available.
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of noncurrent assets classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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