Supplemental Disclosures to Consolidated Statements of Cash Flows (Details) - USD ($) $ in Millions  | 
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015  | 
Dec. 31, 2014  | 
Dec. 31, 2013  | 
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| Supplemental Disclosures to Consolidated Statements of Cash Flow [Abstract] | |||
| Fair value of assets acquired | $ 154 | $ 7 | |
| Intangibles not subject to amortization | 1,791 | 12 | |
| Intangibles subject to amortization | 837 | 2 | |
| Net liabilities assumed | (214) | (7) | |
| Deferred tax assets (liabilities) | (637) | 10 | |
| Fair value of equity consideration | (1,087) | ||
| Cash paid for acquisitions, net of cash acquired | 844 | 24 | |
| Cash paid for interest | 374 | $ 362 | 362 | 
| Cash paid for income taxes | $ 318 | $ 44 | $ 410 | 
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- Definition Aggregate of Deferred tax liabilities assumed in business combinations throughout the period. No definition available. 
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- Definition Fair value of equity issued in a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The fair value of assets acquired in noncash investing or financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination. No definition available. 
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, resulting from a business combination. No definition available. 
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- Definition The amount of cash paid for interest during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The fair value of liabilities assumed in noncash investing or financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- References No definition available. 
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