CONSOLIDATED STATEMENTS OF EQUITY AND NONCONTROLLING INTERESTS - USD ($) $ in Millions	Total	Class A Common Stock	Class B Common Stock	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2023				39,737,682	23,775,056
Beginning balance at Dec. 31, 2023	$ 221			$ 1	$ 0	$ 517	$ (234)	$ 1	$ (64)
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(33)						(33)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				2,768,089
Class A Common Stock issued pursuant to employee benefit plans	43					43
Distributions to noncontrolling interests	(5)								(5)
Other comprehensive income (loss)	5							5
Net income (loss)	44						40		4
Ending balance (in shares) at Jun. 30, 2024				42,505,771	23,775,056
Ending balance at Jun. 30, 2024	275			$ 1	$ 0	560	(227)	6	(65)
Beginning balance (in shares) at Mar. 31, 2024				42,305,323	23,775,056
Beginning balance at Mar. 31, 2024	269			$ 1	$ 0	554	(227)	5	(64)
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(17)						(17)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				200,448
Class A Common Stock issued pursuant to employee benefit plans	6					6
Distributions to noncontrolling interests	(3)								(3)
Other comprehensive income (loss)	1							1
Net income (loss)	19						17		2
Ending balance (in shares) at Jun. 30, 2024				42,505,771	23,775,056
Ending balance at Jun. 30, 2024	275			$ 1	$ 0	560	(227)	6	(65)
Beginning balance (in shares) at Dec. 31, 2024		42,642,126	23,775,056	42,642,126	23,775,056
Beginning balance at Dec. 31, 2024	516			$ 1	$ 0	570	10	2	(67)
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(34)						(34)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				3,249,446
Class A Common Stock issued pursuant to employee benefit plans	34					34
Distributions to noncontrolling interests	(6)								(6)
Acquisition of noncontrolling interests	0					(1)			1
Other comprehensive income (loss)	(1)							(1)
Net income (loss)	(216)						(220)		4
Ending balance (in shares) at Jun. 30, 2025		45,891,572	23,775,056	45,891,572	23,775,056
Ending balance at Jun. 30, 2025	293			$ 1	$ 0	603	(244)	1	(68)
Beginning balance (in shares) at Mar. 31, 2025				45,756,209	23,775,056
Beginning balance at Mar. 31, 2025	368			$ 1	$ 0	597	(163)	1	(68)
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(17)						(17)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				135,363
Class A Common Stock issued pursuant to employee benefit plans	7					7
Distributions to noncontrolling interests	(3)								(3)
Acquisition of noncontrolling interests	0					(1)			1
Net income (loss)	(62)						(64)		2
Ending balance (in shares) at Jun. 30, 2025		45,891,572	23,775,056	45,891,572	23,775,056
Ending balance at Jun. 30, 2025	$ 293			$ 1	$ 0	$ 603	$ (244)	$ 1	$ (68)