Notes and Other Debt, Net - Windstream Credit Agreement (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Total principal amount	$ 9,261.5	$ 5,861.5
Senior secured Windstream term loan - variable rate, due October 1, 2031 (premium is based on imputed interest rate of 9.15%)
Debt Instrument [Line Items]
Total principal amount	$ 500.0	$ 0.0
Effective interest rate	9.15%
Senior secured Windstream term loan - variable rate, due October 1, 2031 (premium is based on imputed interest rate of 9.15%) \| Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	4.75%
Senior secured Windstream term loan - variable rate, due October 1, 2031 (premium is based on imputed interest rate of 9.15%) \| Adjusted Term SOFR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	3.75%
Senior secured Windstream term loan - variable rate, due October 1, 2031 (premium is based on imputed interest rate of 9.15%) \| Minimum \| Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.75%
Senior secured Windstream term loan - variable rate, due October 1, 2031 (premium is based on imputed interest rate of 9.15%) \| Minimum \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	3.75%
Senior secured Windstream term loan - variable rate, due October 1, 2031 (premium is based on imputed interest rate of 9.15%) \| Maximum \| Base Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	3.50%
Senior secured Windstream term loan - variable rate, due October 1, 2031 (premium is based on imputed interest rate of 9.15%) \| Maximum \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	4.50%
Windstream Term Loan
Debt Instrument [Line Items]
Total principal amount	$ 500.0
Mandatory prepayment percentage	100.00%
Variable rate, additional step-down	50.00%
Minimum fixed charge coverage ratio	1.50%
Maximum fixed charge coverage ratio	1.00%
Percentage of first lien senior secured leverage ratio	0.00%
Maximum required first lien secured leverage ratio	1.00%
Prepayment percentage of net cash proceeds received	100.00%
Weighted average interest rate	9.18%
Windstream Term Loan \| Minimum
Debt Instrument [Line Items]
Effective interest rate	9.01%
Windstream Term Loan \| Maximum
Debt Instrument [Line Items]
Effective interest rate	9.21%
Windstream Credit Agreement
Debt Instrument [Line Items]
Weighted average interest rate	9.50%
Line of credit, maximum borrowing capacity	$ 110.0
Repayments of lines of credit	15.0
Letters of credit outstanding	117.7
Remaining borrowing capacity	$ 227.3
Covenant maximum leverage ratio	0.0500
Percentage of voting capital stock	0.65
Percentage of non voting capital stock	1
Windstream Credit Agreement \| Minimum
Debt Instrument [Line Items]
Effective interest rate	8.52%
Windstream Credit Agreement \| Maximum
Debt Instrument [Line Items]
Effective interest rate	10.75%

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