CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities
Net loss	$ (938)	$ (123)	$ (1,017)	$ (25)
Adjustments to reconcile to net cash provided by operating activities:
Amortization of contract intangible asset				4
Depreciation and amortization	175	184	351	369
Share-based compensation expense			16	26
Loss on impairment of assets	1,136	143	1,136	143
(Gain) loss on disposal of assets, net	(7)		(9)	6
Amortization of debt-related balances, net			25	26
Gain on adjustment to bifurcated compound exchange feature			(65)	(79)
Gain on retirement of debt		(140)		(140)
Loss on impairment of investment in unconsolidated affiliate				5
Deferred income tax benefit			(157)	(56)
Other, net			31	(11)
Changes in deferred revenues, net			(84)	97
Changes in deferred costs, net			16	(49)
Changes in other operating assets and liabilities, net			(89)	(269)
Net cash provided by operating activities			154	47
Cash flows from investing activities
Capital expenditures			(84)	(167)
Investment in loan to unconsolidated affiliate				(3)
Proceeds from disposal of assets, net of costs to sell			10	51
Proceeds from disposal of equity investment in unconsolidated affiliate			4
Cash acquired in acquisition of unconsolidated affiliate				5
Net cash used in investing activities			(70)	(114)
Cash flows from financing activities
Repayments of debt			(240)	(1,815)
Proceeds from issuance of debt, net of issue costs				1,767
Other, net			(13)	(5)
Net cash used in financing activities			(253)	(53)
Net decrease in unrestricted and restricted cash and cash equivalents			(169)	(120)
Unrestricted and restricted cash and cash equivalents, beginning of period			941	995
Unrestricted and restricted cash and cash equivalents, end of period	$ 772	$ 875	$ 772	$ 875