Segment Information - Reconciliation (Details) - USD ($)		3 Months Ended		12 Months Ended
	Oct. 31, 2023	Dec. 31, 2024	Jun. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization				$ (2,956,000,000)	$ (2,985,000,000)	$ (3,239,000,000)
Goodwill impairment	$ (1,900,000,000)	$ 0	$ (8,800,000,000)	0	(10,693,000,000)	(3,271,000,000)
Stock-based compensation				(29,000,000)	(52,000,000)	(98,000,000)
OPERATING INCOME (LOSS)				460,000,000	(9,584,000,000)	95,000,000
Total other expense, net				(690,000,000)	(653,000,000)	(1,086,000,000)
Loss before income taxes				(230,000,000)	(10,237,000,000)	(991,000,000)
Income tax (benefit) expense				(175,000,000)	61,000,000	557,000,000
NET LOSS				(55,000,000)	(10,298,000,000)	(1,548,000,000)
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment adjusted EBITDA				6,864,000,000	7,572,000,000	9,810,000,000
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization				(2,956,000,000)	(2,985,000,000)	(3,239,000,000)
Goodwill impairment				0	(10,693,000,000)	(3,271,000,000)
Other unallocated expense				(3,419,000,000)	(3,426,000,000)	(3,107,000,000)
Stock-based compensation				(29,000,000)	(52,000,000)	(98,000,000)
OPERATING INCOME (LOSS)				460,000,000	(9,584,000,000)	95,000,000
Total other expense, net				$ (690,000,000)	$ (653,000,000)	$ (1,086,000,000)