Financial Instruments and Fair Value Measures - Amount Of Gain/(Loss) Recognized For Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Cost of products sold
Gain (loss) on derivatives
Pre-tax gains (losses) to be transferred into cost of products sold for foreign currency cash flow hedges during the next 12 months	$ (57)
Interest expense, net
Gain (loss) on derivatives
Pre-tax gains (losses) to be transferred into interest expense, net for interest rate swap cash flow hedges during the next 12 months	(19)
Pre-tax gains (losses) to be transferred into interest expense, net for treasury rate lock agreement cash flow hedges during the next 12 months	24
Interest expense, net \| Fair value hedges
Gain (loss) on derivatives
Debt designated as hedged item in fair value hedges gain (loss) recognized in the consolidated statements of earnings	57	$ (360)
Designated as hedging instrument \| Senior notes
Gain (loss) on derivatives
Pre-tax gains (losses) from net investment hedge instruments recognized in other comprehensive income	382	60
Foreign currency forward exchange contracts \| Designated as hedging instrument
Gain (loss) on derivatives
Pre-tax gains (losses) from cash flow hedges recognized in other comprehensive income	35	49
Pre-tax gains (losses) from net investment hedge instruments recognized in other comprehensive income	99	40
Foreign currency forward exchange contracts \| Designated as hedging instrument \| Cost of products sold \| Cash flow hedges
Gain (loss) on derivatives
Derivative instrument net gains (losses) recognized in the consolidate statements of earnings	(12)	0
Foreign currency forward exchange contracts \| Designated as hedging instrument \| Interest expense, net \| Net investment hedges
Gain (loss) on derivatives
Derivative instrument net gains (losses) recognized in the consolidate statements of earnings	4	8
Foreign currency forward exchange contracts \| Not designated as hedges \| Net foreign exchange loss
Gain (loss) on derivatives
Derivative instrument net gains (losses) recognized in the consolidate statements of earnings	(25)	2
Treasury rate lock agreements \| Designated as hedging instrument \| Interest expense, net \| Cash flow hedges
Gain (loss) on derivatives
Derivative instrument net gains (losses) recognized in the consolidate statements of earnings	6	6
Designated as fair value hedges \| Designated as hedging instrument
Gain (loss) on derivatives
Pre-tax gains (losses) from cash flow hedges recognized in other comprehensive income	1	(46)
Designated as fair value hedges \| Designated as hedging instrument \| Interest expense, net \| Cash flow hedges
Gain (loss) on derivatives
Derivative instrument net gains (losses) recognized in the consolidate statements of earnings	(7)	1
Designated as fair value hedges \| Designated as hedging instrument \| Interest expense, net \| Fair value hedges
Gain (loss) on derivatives
Derivative instrument net gains (losses) recognized in the consolidate statements of earnings	$ (57)	$ 360

Treasury Rate Lock Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net

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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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