Segment Information and Geographic Information - Summary (Details) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)
Segment Reporting [Abstract]
Number of operating segments \| segment			3
Number of reportable segments \| segment			3
Segment Reporting Information [Line Items]
Depreciation and amortization	$ (226)	$ (129)	$ (438)	$ (257)
Stock-based compensation expense	(272)	(131)	(553)	(408)
Loss from operations	(1,188)	(1,607)	(2,712)	(2,870)
Segments
Segment Reporting Information [Line Items]
Total segment adjusted EBITDA	(23)	(345)	35	(312)
Segments \| Mobility
Segment Reporting Information [Line Items]
Total segment adjusted EBITDA	179	50	477	631
Segments \| Delivery
Segment Reporting Information [Line Items]
Total segment adjusted EBITDA	(161)	(232)	(361)	(545)
Segments \| Freight
Segment Reporting Information [Line Items]
Total segment adjusted EBITDA	(41)	(49)	(70)	(113)
Segments \| All Other
Segment Reporting Information [Line Items]
Total segment adjusted EBITDA	0	(114)	(11)	(285)
Reconciling items:
Segment Reporting Information [Line Items]
Corporate G&A and Platform R&D	(486)	(492)	(903)	(1,137)
Depreciation and amortization	(226)	(129)	(438)	(257)
Stock-based compensation expense	(272)	(131)	(553)	(408)
Legal, tax, and regulatory reserve changes and settlements	(140)	(38)	(691)	(57)
Goodwill and asset impairments/loss on sale of assets	0	(16)	(57)	(209)
Acquisition, financing and divestitures related expenses	(26)	(19)	(62)	(29)
Accelerated lease costs related to cease-use of ROU assets	0	0	(2)	0
COVID-19 response initiatives	(15)	(48)	(41)	(72)
Loss on lease arrangement, net	0	(7)	0	(7)
Restructuring and related charges	$ 0	$ (382)	$ 0	$ (382)

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