Goodwill and Intangible Assets and Liabilities - Schedule of Carrying Value of the Intangible Assets and Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
	Aug. 02, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Schedule Of Indefinite And Finite Lived Intangible Assets And Liabilities [Line Items]
Original Cost		$ 1,561.9	$ 479.1
Accumulated Amortization		(347.5)	(203.7)
Total		1,214.4	275.4
Below-market leases, Original cost		15.2	191.2
Below-market leases, Accumulated amortization		(9.9)	(45.5)
Total		5.3	145.7
Cash proceeds	$ 5.0	10.6	2.6	$ 5.7
Customer relationships
Schedule Of Indefinite And Finite Lived Intangible Assets And Liabilities [Line Items]
Original Cost		750.0	0.0
Accumulated Amortization		(104.8)	0.0
Total		645.2	0.0
Customer lists
Schedule Of Indefinite And Finite Lived Intangible Assets And Liabilities [Line Items]
Original Cost		416.1	416.1
Accumulated Amortization		(197.1)	(174.3)
Total		219.0	241.8
IPv4 addresses
Schedule Of Indefinite And Finite Lived Intangible Assets And Liabilities [Line Items]
Original Cost		179.7	0.0
Accumulated Amortization		(4.4)	0.0
Total	$ 6.7	175.3	0.0
Trade name
Schedule Of Indefinite And Finite Lived Intangible Assets And Liabilities [Line Items]
Original Cost		115.0	0.0
Accumulated Amortization		(3.2)	0.0
Total		111.8	0.0
Contracts
Schedule Of Indefinite And Finite Lived Intangible Assets And Liabilities [Line Items]
Original Cost		52.5	52.5
Accumulated Amortization		(34.5)	(27.9)
Total		18.0	24.6
Rights of way
Schedule Of Indefinite And Finite Lived Intangible Assets And Liabilities [Line Items]
Original Cost		48.6	10.5
Accumulated Amortization		(3.5)	(1.5)
Total		$ 45.1	$ 9.0