Financial Instruments and Fair Value Measures - Financial Instruments (Details)	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 EUR (€) derivative	Dec. 31, 2021 USD ($) derivative	Dec. 31, 2020 EUR (€)	Dec. 31, 2020 USD ($)	Sep. 30, 2019 USD ($)
Derivative instruments, notional amount and fair value
Number of outstanding derivative instruments containing credit risk contingent features | derivative				0	0
Amount excluded from the assessment of effectiveness for cash flow hedges	$ 0	$ 0
Amount excluded from the assessment of effectiveness for fair value hedges	0	0
Fair value - Derivatives in asset position					$ 267,000,000		$ 189,000,000
Fair value - Derivatives in liability position					37,000,000		166,000,000
Designated as hedging instrument | Net investment hedges | Senior notes
Derivative instruments, notional amount and fair value
Aggregate principal amount of senior Euro notes | €				€ 5,900,000,000		€ 6,600,000,000
Designated as hedging instrument | Foreign currency forward exchange contracts
Derivative instruments, notional amount and fair value
Treasury rate lock gain recognized in other comprehensive income (loss)	$ 82,000,000	(71,000,000)	$ (5,000,000)
Designated as hedging instrument | Foreign currency forward exchange contracts | Cash flow hedges
Derivative instruments, notional amount and fair value
Notional amount of derivative instruments					1,100,000,000		1,500,000,000
Duration of forward exchange contracts	18 months
Approximate length of time over which accumulated gains and losses will be recognized in cost of products sold	6 months
Designated as hedging instrument | Foreign currency forward exchange contracts | Cash flow hedges | Prepaid expenses and other
Derivative instruments, notional amount and fair value
Fair value - Derivatives in asset position					51,000,000		2,000,000
Designated as hedging instrument | Foreign currency forward exchange contracts | Cash flow hedges | Accounts payable and accrued liabilities
Derivative instruments, notional amount and fair value
Fair value - Derivatives in liability position					2,000,000		82,000,000
Designated as hedging instrument | Foreign currency forward exchange contracts | Cash flow hedges | Other assets
Derivative instruments, notional amount and fair value
Fair value - Derivatives in asset position					0		0
Designated as hedging instrument | Foreign currency forward exchange contracts | Cash flow hedges | Other long-term liabilities
Derivative instruments, notional amount and fair value
Fair value - Derivatives in liability position					0		6,000,000
Designated as hedging instrument | Foreign currency forward exchange contracts | Net investment hedges
Derivative instruments, notional amount and fair value
Notional amount of derivative instruments | €				€ 4,300,000,000		€ 971,000,000
Designated as hedging instrument | Foreign currency forward exchange contracts | Net investment hedges | Prepaid expenses and other
Derivative instruments, notional amount and fair value
Fair value - Derivatives in asset position					149,000,000		0
Designated as hedging instrument | Foreign currency forward exchange contracts | Net investment hedges | Accounts payable and accrued liabilities
Derivative instruments, notional amount and fair value
Fair value - Derivatives in liability position					0		11,000,000
Designated as hedging instrument | Foreign currency forward exchange contracts | Net investment hedges | Other assets
Derivative instruments, notional amount and fair value
Fair value - Derivatives in asset position					15,000,000		0
Designated as hedging instrument | Foreign currency forward exchange contracts | Net investment hedges | Other long-term liabilities
Derivative instruments, notional amount and fair value
Fair value - Derivatives in liability position					0		0
Designated as hedging instrument | Treasury rate lock agreements
Derivative instruments, notional amount and fair value
Treasury rate lock gain recognized in other comprehensive income (loss)	$ 0	0	383,000,000
Designated as hedging instrument | Treasury rate lock agreements | Cash flow hedges
Derivative instruments, notional amount and fair value
Notional amount of derivative instruments								$ 10,000,000,000
Designated as hedging instrument | Interest rate swap contracts
Derivative instruments, notional amount and fair value
Treasury rate lock gain recognized in other comprehensive income (loss)	$ 2,000,000	$ (53,000,000)	$ 4,000,000
Designated as hedging instrument | Interest rate swap contracts | Cash flow hedges
Derivative instruments, notional amount and fair value
Notional amount of derivative instruments					750,000,000		2,300,000,000
Designated as hedging instrument | Interest rate swap contracts | Cash flow hedges | Prepaid expenses and other
Derivative instruments, notional amount and fair value
Fair value - Derivatives in asset position					0		0
Designated as hedging instrument | Interest rate swap contracts | Cash flow hedges | Accounts payable and accrued liabilities
Derivative instruments, notional amount and fair value
Fair value - Derivatives in liability position					7,000,000		14,000,000
Designated as hedging instrument | Interest rate swap contracts | Cash flow hedges | Other assets
Derivative instruments, notional amount and fair value
Fair value - Derivatives in asset position					0		0
Designated as hedging instrument | Interest rate swap contracts | Cash flow hedges | Other long-term liabilities
Derivative instruments, notional amount and fair value
Fair value - Derivatives in liability position					0		20,000,000
Designated as hedging instrument | Interest rate swap contracts | Fair value hedges
Derivative instruments, notional amount and fair value
Notional amount of derivative instruments					4,500,000,000		4,800,000,000
Designated as hedging instrument | Interest rate swap contracts | Fair value hedges | Prepaid expenses and other
Derivative instruments, notional amount and fair value
Fair value - Derivatives in asset position					0		7,000,000
Designated as hedging instrument | Interest rate swap contracts | Fair value hedges | Accounts payable and accrued liabilities
Derivative instruments, notional amount and fair value
Fair value - Derivatives in liability position					0		0
Designated as hedging instrument | Interest rate swap contracts | Fair value hedges | Other assets
Derivative instruments, notional amount and fair value
Fair value - Derivatives in asset position					26,000,000		131,000,000
Designated as hedging instrument | Interest rate swap contracts | Fair value hedges | Other long-term liabilities
Derivative instruments, notional amount and fair value
Fair value - Derivatives in liability position					15,000,000		0
Not designated as hedging instrument | Foreign currency forward exchange contracts
Derivative instruments, notional amount and fair value
Notional amount of derivative instruments					8,200,000,000		8,600,000,000
Not designated as hedging instrument | Foreign currency forward exchange contracts | Prepaid expenses and other
Derivative instruments, notional amount and fair value
Fair value - Derivatives in asset position					26,000,000		49,000,000
Not designated as hedging instrument | Foreign currency forward exchange contracts | Accounts payable and accrued liabilities
Derivative instruments, notional amount and fair value
Fair value - Derivatives in liability position					$ 13,000,000		$ 33,000,000