Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Equity Award Programs	Common Stock	Common Stock Equity Award Programs	Common stock and additional paid-in capital	Common stock and additional paid-in capital Equity Award Programs	Accumulated deficit	Accumulated other comprehensive income (loss)
Beginning balance, shares at Dec. 31, 2021			70.8
Beginning balance at Dec. 31, 2021	$ 842				$ 1,118		$ (275)	$ (1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)				2.1
Issuance of common stock		$ 23				$ 23
Stock-based compensation	65				65
Other comprehensive (loss) income	(6)							(6)
Net loss	(267)						(267)
Ending balance, shares at Dec. 31, 2022			72.9
Ending balance at Dec. 31, 2022	657				1,206		(542)	(7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)			1.2	1.4
Issuance of common stock	25	7			25	7
Stock-based compensation	73				73
Other comprehensive (loss) income	7							7
Net loss	$ (307)						(307)
Ending balance, shares at Dec. 31, 2023	75.5		75.5
Ending balance at Dec. 31, 2023	$ 462				1,311		(849)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)			15.2	1.5
Issuance of common stock	228	$ 2			228	$ 2
Stock-based compensation	76				76
Net loss	$ (283)						(283)
Ending balance, shares at Dec. 31, 2024	92.2		92.2
Ending balance at Dec. 31, 2024	$ 485				$ 1,617		$ (1,132)	$ 0