Fair Value Measurements (Details BS Table) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Derivatives Fair Value [Line Items]
Available-for-sale Securities	$ 20	$ 0
Derivative Assets	199	237
Derivative Instruments in Hedges, Liabilities, at Fair Value	7	1
Derivative Liabilities	26	23
Designated as Hedging Instrument [Member]
Derivatives Fair Value [Line Items]
Derivative Instruments in Hedges, Assets, at Fair Value	163	204
Not Designated as Hedging Instrument [Member] \| Prepaid Expenses and Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	36	33
Not Designated as Hedging Instrument [Member] \| Other Current Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	19	22
Currency hedge contracts [Member] \| Designated as Hedging Instrument [Member] \| Prepaid Expenses and Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Derivative Instruments in Hedges, Assets, at Fair Value	98	138
Currency hedge contracts [Member] \| Designated as Hedging Instrument [Member] \| Other Long Term Assets [Member]
Derivatives Fair Value [Line Items]
Derivative Instruments in Hedges, Assets, at Fair Value	65	66
Currency hedge contracts [Member] \| Designated as Hedging Instrument [Member] \| Other Current Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivative Instruments in Hedges, Liabilities, at Fair Value	3	1
Currency hedge contracts [Member] \| Designated as Hedging Instrument [Member] \| Other Noncurrent Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivative Instruments in Hedges, Liabilities, at Fair Value	4	0
Fair Value, Measurements, Recurring [Member]
Derivatives Fair Value [Line Items]
Accrued Contingent Consideration	204	246
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Derivatives Fair Value [Line Items]
Available-for-sale Securities	0	0
Accrued Contingent Consideration	$ 204	$ 246

Estimated discounted potential payments under contingent consideration arrangements.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Aggregate fair value of all derivative liabilities designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations.

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Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset.

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