Financial Instruments and Fair Value Measures - Amount Of Gain/(Loss) Recognized For Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Gain (loss) on derivatives
Foreign currency cash flow hedge gain expected to be reclassified during next 12 months	$ 126
Fair Value Hedges \| Interest expense, net
Gain (loss) on derivatives
Debt designated as hedged item in fair value hedges gain (loss)	(112)	$ 184
Senior notes \| Designated as hedging instrument
Gain (loss) on derivatives
Pre-tax gains (losses) from non-derivative net investment hedge recognized in other comprehensive income	84	(134)
Foreign currency forward exchange contracts
Gain (loss) on derivatives
Pre-tax gains (losses) from derivative instruments recognized in other comprehensive income	3	(48)
Foreign currency forward exchange contracts \| Not designated as hedges \| Net foreign exchange loss
Gain (loss) on derivatives
Derivative gain (loss), net	15	(59)
Foreign currency forward exchange contracts \| Cash Flow Hedges \| Designated as hedging instrument \| Cost of products sold
Gain (loss) on derivatives
Derivative gain (loss), net	40	(44)
Interest rate swaps designated as fair value hedges \| Fair Value Hedges \| Designated as hedging instrument \| Interest expense, net
Gain (loss) on derivatives
Derivative gain (loss), net	$ 112	$ (184)

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Amount of unrealized gain (loss) included in earnings related to the fair value of the hedged item in an interest rate fair value hedge, offset by the gain (loss) on the hedging instrument to the extent that the fair value hedge is determined to be effective.

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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

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Amount, before tax and reclassification, of gain (loss) from derivative designated and qualifying as net investment hedge.

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