Goodwill and Intangible Assets - Changes in Goodwill and Intangible Assets (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)
Goodwill
Balance at January 1, 2022	$ 21,978
Currency	(134)
Acquisitions	774
Asset impairments	0
Balance at March 31, 2022	22,618
Intangible Assets, at cost
Balance at January 1, 2022	20,290
Currency	(94)
Acquisitions	734
Asset impairments	(78)
Balance at March 31, 2022	$ 20,852