Supplementary Unrestricted Subsidiary Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2025

Condensed Financial Information Disclosure [Abstract]

Schedule of Consolidated Balance Sheet Information Reflecting the Elimination of the Accounts of Unrestricted Subsidiaries

Below are the unaudited consolidated balance sheets as of December 31, 2025 and 2024, and the unaudited consolidated statements of income (loss) for the year ended December 31, 2025 and 2024 respectively, of such unrestricted subsidiaries:

	As of December 31, 2025
(Millions)	Unrestricted Subsidiaries		Restricted Subsidiaries		Eliminations		Consolidated
Assets:
Current assets:
Cash and cash equivalents	$	5.4	$	48.1	$	—	$	53.5
Restricted cash	75.2		5.4		—		80.6
Accounts receivable, net	18.0		394.6		(53.6)		359.0
Inventories	—		44.0		—		44.0
Prepaid expenses	—		137.6		—		137.6
Other current assets	—		156.3		—		156.3
Total current assets	98.6		786.0		(53.6)		831.0
Goodwill	—		1,158.3		—		1,158.3
Intangible assets, net	—		1,293.3		—		1,293.3
Property, plant and equipment, net	614.4		7,527.5		—		8,141.9
Operating lease right-of-use assets, net	—		516.6		—		516.6
Other assets	23.4		103.2		(31.0)		95.6
Total assets	$	736.4	$	11,384.9	$	(84.6)	$	12,036.7
Liabilities and shareholders' equity (deficit):
Current liabilities:
Current portion of long-term debt	$	—	$	10.0	$	—	$	10.0
Accounts payable	47.7		177.4		(53.6)		171.5
Deferred revenue	7.4		233.5		(1.1)		239.8
Current portion of operating lease obligations	—		122.6		—		122.6
Accrued taxes	0.5		51.3		—		51.8
Accrued interest	10.3		128.5		—		138.8
Other current liabilities	—		389.4		—		389.4
Total current liabilities	65.9		1,112.7		(54.7)		1,123.9
Notes and other debt, net	822.1		8,728.6		(21.3)		9,529.4
Noncurrent operating lease obligations	—		360.5		—		360.5
Noncurrent deferred revenue	62.5		314.8		(8.6)		368.7
Deferred income tax assets, net	—		17.7		—		17.7
Other liabilities	—		256.1		—		256.1
Total liabilities	950.5		10,790.4		(84.6)		11,656.3
Shareholders' (deficit) equity:
Total shareholders' (deficit) equity	(214.1)		594.5		—		380.4
Total liabilities and shareholders' equity (deficit)	$	736.4	$	11,384.9	$	(84.6)	$	12,036.7

	As of December 31, 2024
(Millions)	Unrestricted Subsidiaries		Restricted Subsidiaries		Eliminations		Consolidated
Assets:
Current assets:
Cash and cash equivalents	$	1.7	$	153.9	$	—	$	155.6
Restricted cash	28.1		0.1		—		28.2
Accounts receivable, net	9.0		46.4		(3.9)		51.5
Prepaid expenses	—		16.2		—		16.2
Other current assets	0.1		18.0		—		18.1
Total current assets	38.9		234.6		(3.9)		269.6
Goodwill	—		157.4		—		157.4
Intangible assets, net	—		275.4		—		275.4
Property, plant and equipment, net	446.5		3,763.2		—		4,209.7
Operating lease right-of-use assets, net	—		126.8		—		126.8
Deferred income tax assets, net	—		128.0		—		128.0
Other assets	0.8		284.9		(170.5)		115.2
Total assets	$	486.2	$	4,970.3	$	(174.4)	$	5,282.1
Liabilities and shareholders' equity (deficit):
Current liabilities:
Accounts payable	$	3.2	$	14.3	$	(3.9)	$	13.6
Deferred revenue	4.6		79.9		—		84.5
Current portion of operating lease obligations	—		12.7		—		12.7
Accrued taxes	0.2		6.9		—		7.1
Accrued interest	0.9		143.0		—		143.9
Other current liabilities	—		118.9		—		118.9
Total current liabilities	8.9		375.7		(3.9)		380.7
Notes and other debt, net	271.3		5,512.3		—		5,783.6
Noncurrent operating lease obligations	—		67.8		—		67.8
Noncurrent deferred revenue	38.8		1,277.7		—		1,316.5
Other liabilities	—		185.4		—		185.4
Total liabilities	319.0		7,418.9		(3.9)		7,734.0
Shareholders' equity (deficit):
Total shareholders' equity (deficit)	167.2		(2,448.6)		(170.5)		(2,451.9)
Total liabilities and shareholders' equity (deficit)	$	486.2	$	4,970.3	$	(174.4)	$	5,282.1

Schedule of Consolidating Statement of Operations Information Reflecting The Elimination of the Accounts of Unrestricted Subsidiaries

	For the Year Ended December 31, 2025
(Millions)	Unrestricted Subsidiaries		Restricted Subsidiaries		Eliminations		Consolidated
Total revenues and sales	$	152.0	$	2,152.6	$	(70.1)	$	2,234.5
Costs and expenses:
Cost of services (exclusive of depreciation and    amortization)	53.0		687.5		(53.9)		686.6
Cost of sales (exclusive of depreciation    and amortization)	—		56.0		—		56.0
Selling, general and administrative	18.1		349.6		(16.2)		351.5
Depreciation and amortization	25.4		641.2		—		666.6
Gain on sale of operating assets	—		—		—		—
Transaction related and other costs	—		211.8		—		211.8
Total costs and expenses	96.5		1,946.1		(70.1)		1,972.5
Operating income	55.5		206.5		—		262.0
Other expense, net	—		8.1		—		8.1
Loss on extinguishment of debt	—		(183.0)		—		(183.0)
Gain on settlement of preexisting relationships	0.2		1,683.7		—		1,683.9
Interest expense, net	(41.7)		(561.1)		—		(602.8)
Income before income taxes	14.0		1,154.2		—		1,168.2
Income tax benefit	—		136.5		—		136.5
Net income	$	14.0	$	1,290.7	$	—	$	1,304.7

	For the Year Ended December 31, 2024
(Millions)	Unrestricted Subsidiaries		Restricted Subsidiaries		Eliminations		Consolidated
Total revenues and sales	$	71.5	$	1,109.6	$	(14.2)	$	1,166.9
Costs and expenses:
Cost of services (exclusive of depreciation    and amortization)	—		128.6		—		128.6
Cost of sales (exclusive of depreciation    and amortization)	—		11.7		—		11.7
Selling, general and administrative	32.9		86.3		(14.2)		105.0
Depreciation and amortization	17.3		297.6		—		314.9
Gain on sale of operating assets	—		(19.0)		—		(19.0)
Transaction related and other costs	—		38.7		—		38.7
Total costs and expenses	50.2		543.9		(14.2)		579.9
Operating income	21.3		565.7		—		587.0
Other income, net	—		0.3		—		0.3
Loss on extinguishment of debt	—		—		—		—
Interest expense, net	(24.1)		(487.3)		—		(511.4)
(Loss) income before income taxes	(2.8)		78.7		—		75.9
Income tax benefit	—		17.5		—		17.5
Net (loss) income	$	(2.8)	$	96.2	$	—	$	93.4