Fair Value Measurements Fair Value Measurements (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	$ 2,736		$ 2,564
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	21	(6)
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	69
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax, Ending Balance	112		139
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	2,157		1,952
Interest Rate Derivatives, at Fair Value, Net	450
Gain/Loss related to ineffective portion of hedging relationships	10
Unamortized gains on senior notes	52		54
Unamortized losses on senior notes	2		2
Unrealized gain on interest rate cash flow hedges, pretax, AOCI	3		3
reduction of interest expense, related to amortization of previously terminated interest rate contracts	2
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	9
Derivative Assets	221		265
Derivative Liabilities	56		63
Interest Rate Derivative Assets, at Fair Value	6		1
Accrued Contingent Consideration	472		501
Interest Rate Derivative Liabilities, at Fair Value	0		8
Time Deposits, at Carrying Value	9		31
Cash	153		148
Cost-method Investments, Aggregate Carrying Amount	26		20
Asset Impairment Charges	55
Goodwill and intangible asset impairment losses in period		423
Debt Instrument, Fair Value Disclosure	4,662		4,602
Loss on hedged debt obligation [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Expense, Other	10
Fair Value, Inputs, Level 1 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Derivative Assets, at Fair Value	0		0
Interest Rate Derivative Liabilities, at Fair Value	0		0
Fair Value, Inputs, Level 2 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Money Market Funds, at Carrying Value	0
Interest Rate Derivative Assets, at Fair Value	6		1
Interest Rate Derivative Liabilities, at Fair Value	0		8
Fair Value, Inputs, Level 3 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Derivative Assets, at Fair Value	0		0
Interest Rate Derivative Liabilities, at Fair Value	0		0
Fair Value, Measurements, Recurring [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Money Market Funds, at Carrying Value	29		38
Foreign Currency Contract, Asset, Fair Value Disclosure	215		264
Assets, Fair Value Disclosure	250		303
Foreign Currency Contracts, Liability, Fair Value Disclosure	56		55
Accrued Contingent Consideration	472		501
Liabilities, Fair Value Disclosure	528		564
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Money Market Funds, at Carrying Value	29		38
Foreign Currency Contract, Asset, Fair Value Disclosure	0		0
Assets, Fair Value Disclosure	29		38
Foreign Currency Contracts, Liability, Fair Value Disclosure	0		0
Accrued Contingent Consideration	0		0
Liabilities, Fair Value Disclosure	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	215		264
Assets, Fair Value Disclosure	221		265
Foreign Currency Contracts, Liability, Fair Value Disclosure	56		55
Accrued Contingent Consideration	0		0
Liabilities, Fair Value Disclosure	56		63
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
Foreign Currency Contract, Asset, Fair Value Disclosure	0		0
Assets, Fair Value Disclosure	0		0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0		0
Accrued Contingent Consideration	472		501
Liabilities, Fair Value Disclosure	472		501
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount			450
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments in Hedges, Assets, at Fair Value	200		238
Derivative Instruments in Hedges, Liabilities, at Fair Value	32		40
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	106		117
Designated as Hedging Instrument [Member] | Other Long Term Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments in Hedges, Assets, at Fair Value	88		120
Designated as Hedging Instrument [Member] | Other current liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments in Hedges, Liabilities, at Fair Value	13		13
Designated as Hedging Instrument [Member] | Other Long Term Liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments in Hedges, Liabilities, at Fair Value	19		19
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	21		27
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	24		23
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	21	26
Net gain (loss) from foreign currency transaction exposures	(24)	(28)
Foreign Currency Transaction Gain (Loss), Realized	(3)	(2)
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	(21)	113
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	21	(6)
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	(21)	113
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	21	(6)
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	4		1
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	2		0
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Other Long Term Liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments in Hedges, Liabilities, at Fair Value	$ 0		$ 8