Description of Business and Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
	May 14, 2019	Oct. 31, 2020	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Subsidiary, Sale of Stock [Line Items]
Accumulated deficit			$ 23,130	$ 16,362
Chargebacks and credit card losses			$ 178	$ 195		$ 208
ROU assets generated from leased assets outside of the U.S. (Less than)			12.00%	13.00%
Cost of revenue, exclusive of depreciation and amortization shown separately below			$ 5,154	$ 6,061	[1]	4,786	[1]
Term of joint collaboration agreement			3 years
Share-based compensation expense			$ 827	4,596		172
Advertising expenses			992	1,300		1,300
Incentives, refunds, and credits to end-users			2,000	2,500		1,400
Delivery
Subsidiary, Sale of Stock [Line Items]
Revenue excluding vehicle solutions revenue			3,904	$ 1,401		$ 772
End-Users Fee [Member] | Mobility
Subsidiary, Sale of Stock [Line Items]
Revenue excluding vehicle solutions revenue			323
End-Users Fee [Member] | Delivery
Subsidiary, Sale of Stock [Line Items]
Revenue excluding vehicle solutions revenue			91
Cost of revenue, exclusive of depreciation and amortization shown separately below			$ 439
Service-Based Awards
Subsidiary, Sale of Stock [Line Items]
Requisite service period			4 years
Expected dividend yield			0.00%
Performance-Based Awards
Subsidiary, Sale of Stock [Line Items]
Requisite service period			4 years
Expected dividend yield			0.00%	0.00%		0.00%
Share-based compensation, award vesting period			4 years
Market-Based Awards
Subsidiary, Sale of Stock [Line Items]
Share-based compensation, award vesting period			4 years
Employee Stock Purchase Plan
Subsidiary, Sale of Stock [Line Items]
Employee stock purchase plan, discount from market price			15.00%
Minimum
Subsidiary, Sale of Stock [Line Items]
Intangible assets estimated useful lives			1 year
Maximum
Subsidiary, Sale of Stock [Line Items]
Intangible assets estimated useful lives			18 years
The JV Business
Subsidiary, Sale of Stock [Line Items]
Payments to acquire variable interest entity		$ 100
IPO
Subsidiary, Sale of Stock [Line Items]
Share-based compensation expense	$ 3,600
Sales and marketing
Subsidiary, Sale of Stock [Line Items]
Contract referral expense				$ 103		$ 136
Share-based compensation expense			$ 48	$ 242		$ 9

[1] Our revenue and cost of revenue, exclusive of depreciation and amortization, have been retrospectively adjusted to reflect the implementation of our new accounting policy adopted in the fourth quarter of 2020. Refer to Note 1 - Description of Business and Summary of Significant Accounting Policies for further information on the change in accounting policy.