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 loss
Beginning balance, shares at Dec. 31, 2020			63.7
Beginning balance at Dec. 31, 2020	$ 502				$ 830		$ (328)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)			5.7	1.4
Issuance of common stock	220	$ 13			220	$ 13
Stock-based compensation	55				55
Other comprehensive gain (loss)	(1)							(1)
Net income (loss)	53						53
Ending balance, shares at Dec. 31, 2021			70.8
Ending 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 gain (loss)	(6)							(6)
Net income (loss)	$ (267)						(267)
Ending balance, shares at Dec. 31, 2022	72.9		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 gain (loss)	7							7
Net income (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