CONSOLIDATED STATEMENTS OF STOCKHOLDERS' (DEFICIT) EQUITY (UNAUDITED) - USD ($) $ in Millions	Total	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	ACCUMULATED OTHER COMPREHENSIVE LOSS	ACCUMULATED DEFICIT
Balance at beginning of period at Dec. 31, 2023		$ 1,008	$ 18,126	$ (810)	$ (17,907)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock through incentive and benefit plans		8
Shares withheld to satisfy tax withholdings		0	(1)
Stock-based compensation		0	11
Other		0	(1)
Other comprehensive income	$ 24			24
Net (loss) income	8				8
Balance at end of period at Jun. 30, 2024	466	1,016	18,135	(786)	(17,899)
Balance at beginning of period at Mar. 31, 2024		1,016	18,137	(799)	(17,850)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock through incentive and benefit plans		0
Shares withheld to satisfy tax withholdings		0	0
Stock-based compensation		0	(3)
Other		0	1
Other comprehensive income	13			13
Net (loss) income	(49)				(49)
Balance at end of period at Jun. 30, 2024	466	1,016	18,135	(786)	(17,899)
Balance at beginning of period at Dec. 31, 2024	464	19,149	0	(723)	(17,962)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock through incentive and benefit plans		0
Shares withheld to satisfy tax withholdings		(12)	0
Stock-based compensation		22	0
Other		3	0
Other comprehensive income	44			44
Net (loss) income	(1,116)				(1,116)
Balance at end of period at Jun. 30, 2025	(595)	19,162	0	(679)	(19,078)
Balance at beginning of period at Mar. 31, 2025		19,152	0	(700)	(18,163)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock through incentive and benefit plans		0
Shares withheld to satisfy tax withholdings		(2)	0
Stock-based compensation		12	0
Other		0	0
Other comprehensive income	21			21
Net (loss) income	(915)				(915)
Balance at end of period at Jun. 30, 2025	$ (595)	$ 19,162	$ 0	$ (679)	$ (19,078)