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Goodwill and Intangible Assets - Narrative (Details) - USD ($)							3 Months Ended		12 Months Ended
	Nov. 12, 2021	Oct. 12, 2021	Dec. 01, 2020	Jul. 14, 2020	Jul. 06, 2020	Jan. 02, 2020	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Aug. 31, 2021	Jul. 05, 2020
Business Acquisition [Line Items]
Goodwill acquired									$ 2,237,000,000	$ 6,107,000,000
Goodwill impairment							$ 100,000,000	$ 0	73,000,000	100,000,000
Intangible assets									23,000,000	23,000,000
Property and equipment									17,000,000	154,000,000
Amortization expense									439,000,000	155,000,000	$ 16,000,000
Asset impairment									$ 116,000,000	404,000,000	$ 0
General and administrative
Business Acquisition [Line Items]
Asset impairment										52,000,000
Operations and support
Business Acquisition [Line Items]
Asset impairment										18,000,000
Research and development
Business Acquisition [Line Items]
Asset impairment										$ 24,000,000
New Mobility
Business Acquisition [Line Items]
Intangible assets							23,000,000
Property and equipment							47,000,000
Other current assets							$ 23,000,000
Careem Inc.
Business Acquisition [Line Items]
Goodwill acquired						$ 2,500,000,000
Fair Value						$ 540,000,000
Cornershop Global LLC
Business Acquisition [Line Items]
Goodwill acquired					$ 384,000,000
Fair Value					$ 122,000,000
Percentage equity interest acquired					55.00%							45.00%
Routematch Holdings, Inc.
Business Acquisition [Line Items]
Goodwill acquired				$ 91,000,000
Fair Value				$ 27,000,000
Percentage equity interest acquired				100.00%
Postmates, Inc.
Business Acquisition [Line Items]
Goodwill acquired			$ 3,100,000,000
Fair Value			$ 1,015,000,000
Percentage equity interest acquired			100.00%										100.00%
The Drizly Group
Business Acquisition [Line Items]
Goodwill acquired		$ 619,000,000
Fair Value		$ 395,000,000
Tupelo Parent, Inc.
Business Acquisition [Line Items]
Goodwill acquired	$ 1,400,000,000
Fair Value	$ 902,000,000