Acquisitions, Goodwill, and Acquired Intangible Assets - Summary of Goodwill Activity by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill, balance at beginning of period	$ 15,017	$ 14,754
New acquisitions	366	212
Other adjustments	(12)	51
Goodwill, balance at end of period	15,371	15,017
North America
Goodwill [Roll Forward]
Goodwill, balance at beginning of period	12,527	12,264
New acquisitions	230	204
Other adjustments	1	59
Goodwill, balance at end of period	12,758	12,527
International
Goodwill [Roll Forward]
Goodwill, balance at beginning of period	1,288	1,300
New acquisitions	60	6
Other adjustments	(21)	(18)
Goodwill, balance at end of period	1,327	1,288
AWS
Goodwill [Roll Forward]
Goodwill, balance at beginning of period	1,202	1,190
New acquisitions	76	2
Other adjustments	8	10
Goodwill, balance at end of period	$ 1,286	$ 1,202