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 (Loss)	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	(49)						(49)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				2,846,408
Class A Common Stock issued pursuant to employee benefit plans	48					48
Distributions to noncontrolling interests	(8)								(8)
Other comprehensive loss	(3)							(3)
Net (loss) income	140						134		6
Ending balance (in shares) at Sep. 30, 2024				42,584,090	23,775,056
Ending balance at Sep. 30, 2024	349			$ 1	$ 0	565	(149)	(2)	(66)
Beginning balance (in shares) at Jun. 30, 2024				42,505,771	23,775,056
Beginning balance at Jun. 30, 2024	275			$ 1	$ 0	560	(227)	6	(65)
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(16)						(16)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				78,319
Class A Common Stock issued pursuant to employee benefit plans	5					5
Distributions to noncontrolling interests	(3)								(3)
Other comprehensive loss	(8)							(8)
Net (loss) income	96						94		2
Ending balance (in shares) at Sep. 30, 2024				42,584,090	23,775,056
Ending balance at Sep. 30, 2024	349			$ 1	$ 0	565	(149)	(2)	(66)
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	(52)						(52)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				3,218,676
Class A Common Stock issued pursuant to employee benefit plans	39					39
Distributions to noncontrolling interests	(8)								(8)
Other comprehensive loss	(1)							(1)
Acquisition of noncontrolling interests, net	(3)					(1)			(2)
Net (loss) income	(215)						(221)		6
Ending balance (in shares) at Sep. 30, 2025		45,860,802	23,775,056	45,860,802	23,775,056
Ending balance at Sep. 30, 2025	276			$ 1	$ 0	608	(263)	1	(71)
Beginning balance (in shares) at Jun. 30, 2025				45,891,572	23,775,056
Beginning balance at Jun. 30, 2025	293			$ 1	$ 0	603	(244)	1	(68)
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(18)						(18)
Class A Common Stock issued pursuant to employee benefit plans (in shares)				(30,770)
Class A Common Stock issued pursuant to employee benefit plans	5					5
Distributions to noncontrolling interests	(2)								(2)
Acquisition of noncontrolling interests, net	(3)								(3)
Net (loss) income	1						(1)		2
Ending balance (in shares) at Sep. 30, 2025		45,860,802	23,775,056	45,860,802	23,775,056
Ending balance at Sep. 30, 2025	$ 276			$ 1	$ 0	$ 608	$ (263)	$ 1	$ (71)