Fair Value Measurements Fair Value Measurements (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	$ 1,738			$ 1,738		$ 2,178
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	(53)		$ 22	(102)	$ 43
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	125			125
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax, Ending Balance	197			197		217
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	2,375			2,375		2,470
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness			8	(8)	18
Gain (loss) recognized in earnings for terminated interest rate swaps	11	$ 35
Unamortized gains on senior notes	69			69		45
Unamortized losses on senior notes	1			1		2
Unrealized gain on interest rate cash flow hedges, pretax, AOCI	10			10		2
reduction of interest expense, related to amortization of previously terminated interest rate contracts	5			7
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	13			13
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	10			11
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1			2
Derivative Assets	329			329		444
Derivative Liabilities	27			27		36
Accrued Contingent Consideration	241			241		274
Time Deposits, at Carrying Value	348			348		255
Cash	184			184		181
Cost-method Investments, Aggregate Carrying Amount	47			47		27
Intangible asset impairment charges	9		110	9	165
Asset Impairment Charges			55
Debt Instrument, Fair Value Disclosure	5,300			5,300		4,613
Loss on hedged debt obligation [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Expense, Other			(8)	(8)	(18)
Fair Value, Inputs, Level 1 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Derivative Assets, at Fair Value	0			0		0
Fair Value, Inputs, Level 2 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Money Market Funds, at Carrying Value	0			0
Fair Value, Inputs, Level 3 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Derivative Assets, at Fair Value	0			0		0
Fair Value, Measurements, Recurring [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Money Market Funds, at Carrying Value	371			371		151
Foreign Currency Contract, Asset, Fair Value Disclosure	329			329		419
Interest Rate Derivative Assets, at Fair Value	0			0		25
Assets, Fair Value Disclosure	700			700		595
Foreign Currency Contracts, Liability, Fair Value Disclosure	27			27		36
Accrued Contingent Consideration	241			241		274
Liabilities, Fair Value Disclosure	268			268		310
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Money Market Funds, at Carrying Value	371			371		151
Foreign Currency Contract, Asset, Fair Value Disclosure	0			0		0
Assets, Fair Value Disclosure	371			371		151
Foreign Currency Contracts, Liability, Fair Value Disclosure	0			0		0
Accrued Contingent Consideration	0			0		0
Liabilities, Fair Value Disclosure	0			0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Money Market Funds, at Carrying Value						0
Foreign Currency Contract, Asset, Fair Value Disclosure	329			329		419
Interest Rate Derivative Assets, at Fair Value	0			0		25
Assets, Fair Value Disclosure	329			329		444
Foreign Currency Contracts, Liability, Fair Value Disclosure	27			27		36
Accrued Contingent Consideration	0			0		0
Liabilities, Fair Value Disclosure	27			27		36
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Money Market Funds, at Carrying Value	0			0		0
Foreign Currency Contract, Asset, Fair Value Disclosure	0			0		0
Assets, Fair Value Disclosure	0			0		0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0			0		0
Accrued Contingent Consideration	241			241		274
Liabilities, Fair Value Disclosure	241			241		274
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	450			450		450
Interest rate swaps terminated in Q1 2015 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Accrued Investment Income Receivable		$ 7
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments in Hedges, Assets, at Fair Value	285			285		344
Derivative Instruments in Hedges, Liabilities, at Fair Value	1			1		1
Designated as Hedging Instrument [Member] | Prepaid And Other Current Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments in Hedges, Assets, at Fair Value	171			171		178
Designated as Hedging Instrument [Member] | Other Long Term Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments in Hedges, Assets, at Fair Value	114			114		141
Designated as Hedging Instrument [Member] | Other current liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments in Hedges, Liabilities, at Fair Value	1			1		1
Not Designated as Hedging Instrument [Member] | Prepaid And Other Current Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	44			44		100
Not Designated as Hedging Instrument [Member] | Other current liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	26			26		35
Not Designated as Hedging Instrument [Member] | Other, net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(9)		(17)	14	(20)
Net gain (loss) from foreign currency transaction exposures	4		14	(28)	14
Foreign Currency Transaction Gain (Loss), Realized	(5)		(3)	(14)	(6)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(15)		(20)	79	(40)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	54		22	104	43
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Cost of products sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(25)		(20)	68	(40)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	53		$ 22	102	$ 43
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Prepaid And Other Current Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments in Hedges, Assets, at Fair Value	0			0		3
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Long Term Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments in Hedges, Assets, at Fair Value	$ 0			$ 0		$ 22