Revenues - Schedule of Contract Assets and Contract Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Capitalized Contract Cost [Line Items]
Contract assets	$ 61.7	$ 0.0
Contract liabilities	173.9	10.0
Other current assets	34.8
Other assets	26.9
Current deferred revenue	112.9	2.7
Noncurrent deferred revenue	61.0	7.3
Revenues recognized included in the opening contract liability balance	$ 4.9	3.6	$ 4.1
Windstream
Capitalized Contract Cost [Line Items]
Increase in contract assets		57.4
Increase in contract liabilities		$ 161.6