Fair Value Measurements (Details) - USD ($) $ in Millions	3 Months Ended						12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contracts, Liability, Fair Value Disclosure			$ 2,178				$ 1,458	$ 2,178
Accrued Contingent Consideration			(274)				(246)	(274)	$ (501)
Derivative Instruments, Gain (Loss) [Line Items]
Cost Method Investments			27				45	27
Time Deposits, at Carrying Value			255				31	255
Cash			181				170	181
Gain (loss) related to ineffective portion of hedging relationships							(1)	0
Impairment of Intangible Assets (Excluding Goodwill)	$ 10	$ 9	18	$ 12			19	195	53
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net								105	(36)
Unrealized gain on derivative financial instruments			217				145	217
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months							103
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net			2,470				2,090	2,470
Notional Amount of Interest Rate Derivatives		450							450
Gain (loss) recognized in earnings for terminated interest rate swaps		$ 11
Interest Rate Derivatives, at Fair Value, Net							35
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net							2	1	1
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net							11	0	0
Unamortized gains on senior notes			45				63	45
Unamortized losses on senior notes			2				1	2
Unrealized gain on interest rate cash flow hedges, pretax, AOCI			2				10	2
Gain (loss) recognized in earnings for previously terminated interest rate swaps							13	9	10
Gain (loss) on previously terminated interest rate swaps to be reclassified within twelve months							13
Asset Impairment Charges					$ 110	$ 55	19	195	476
Debt Instrument, Fair Value Disclosure			4,613				5,887	4,613
Interest rate swaps terminated in Q1 2015 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Accrued Investment Income Receivable										$ 7
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net							215	106	37
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net							109	227	207
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Cost of products sold [Member] | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net							213	105	36
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net							98	227	207
Not Designated as Hedging Instrument [Member] | Other, net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) from foreign currency transaction exposures							(69)	(70)	(56)
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net							48	52	45
Foreign Currency Transaction Gain (Loss), Realized							(21)	(18)	$ (11)
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Instruments in Hedges, Assets, at Fair Value			0				0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money Market Funds, at Carrying Value							0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Instruments in Hedges, Assets, at Fair Value			0				0	0
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money Market Funds, at Carrying Value			151				118	151
Foreign Currency Contract, Asset, Fair Value Disclosure			419				237	419
Derivative Instruments in Hedges, Assets, at Fair Value			25				0	25
Assets, Fair Value Disclosure			595				355	595
Foreign Currency Contracts, Liability, Fair Value Disclosure			36				23	36
Accrued Contingent Consideration			274				246	274
Liabilities, Fair Value Disclosure			310				269	310
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money Market Funds, at Carrying Value			151				118	151
Foreign Currency Contract, Asset, Fair Value Disclosure			0				0	0
Assets, Fair Value Disclosure			151				118	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]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money Market Funds, at Carrying Value			0					0
Foreign Currency Contract, Asset, Fair Value Disclosure			419				237	419
Derivative Instruments in Hedges, Assets, at Fair Value			25				0	25
Assets, Fair Value Disclosure			444				237	444
Foreign Currency Contracts, Liability, Fair Value Disclosure			36				23	36
Accrued Contingent Consideration			0				0	0
Liabilities, Fair Value Disclosure			36				23	36
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [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			274				246	274
Liabilities, Fair Value Disclosure			$ 274				246	274
(Gain) Loss on hedged debt obligation [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Expense, Other							(8)	(29)
Loss on hedged debt obligation [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Expense, Other							$ 8	$ 29