CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (1,195)	$ (1,712)	$ (2,544)	$ (3,305)
Other comprehensive (loss) / income	1	(1)	2	(1)
Comprehensive loss	$ (1,194)	$ (1,713)	$ (2,542)	$ (3,306)