Acquisitions and Divestitures - Acquisitions (Details) $ in Millions	1 Months Ended	3 Months Ended			9 Months Ended
	Feb. 28, 2019 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) item	Sep. 30, 2019 USD ($)
Supplemental information:
Cash paid, net of cash acquired					$ 25	$ 704
Net sales		$ 8,350		$ 7,991	23,601	24,025
Operating loss		$ (1,909)		(2,011)	$ (5,312)	(4,849)
Number of business combinations completed | item					0
M*Modal
Supplemental information:
Cash paid	$ 700
Assumed debt	$ 300
Net sales				75		200
Operating loss				$ 5		$ 40
Acelity Inc. and its KCI subsidiaries
Supplemental information:
Adjustments to purchase price allocation					$ 34
Net sales			$ 350
Operating loss			$ 45