CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss) including non-controlling interests	$ 1,112	$ (1,772)	$ 990	$ (4,718)
Other comprehensive income (loss), net of tax:
Change in foreign currency translation adjustment	21	(257)	54	(405)
Change in unrealized gain (loss) on investments in available-for-sale securities	6	8	1,162	(52)
Other comprehensive income (loss), net of tax	27	(249)	1,216	(457)
Comprehensive income (loss) including non-controlling interests	1,139	(2,021)	2,206	(5,175)
Less: comprehensive income (loss) attributable to non-controlling interests	(32)	3	(46)	(7)
Comprehensive income (loss) attributable to Uber Technologies, Inc.	$ 1,171	$ (2,024)	$ 2,252	$ (5,168)