Segment Information - Schedule of Reconciliation of Segment Adjusted EBITDA to Net (Loss) Income (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Depreciation and amortization	$ (755)		$ (808)	$ (2,234)	$ (2,443)
Goodwill impairment	0	$ (8,800)	0	(8,793)	0
Operating income (loss)	223		1,384	(7,808)	3,379
Total other expense, net	(308)		(447)	(287)	(1,188)
(Loss) income before income taxes	(85)		937	(8,095)	2,191
Income tax (benefit) expense	(7)		359	208	670
Net (loss) income	(78)		578	(8,303)	1,521
Operating Segments
Segment Reporting Information [Line Items]
Total segment adjusted EBITDA	2,143		2,810	6,700	8,928
Segment Reconciling Items
Segment Reporting Information [Line Items]
Depreciation and amortization	(755)		(808)	(2,234)	(2,443)
Goodwill impairment	0		0	(8,793)	0
Other unallocated expense	(1,149)		(595)	(3,442)	(3,035)
Stock-based compensation	(16)		(23)	(39)	(71)
Operating income (loss)	223		1,384	(7,808)	3,379
Total other expense, net	$ (308)		$ (447)	$ (287)	$ (1,188)