Mergers and Acquisitions - Purchase Price Allocation (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	May 02, 2022	Dec. 31, 2021	Sep. 07, 2021
Assets acquired
Goodwill	$ 721.0	$ 723.5		$ 646.3
Cincinnati Bell Inc. [Member]
Assets acquired
Cash					$ 11.2
Receivables					318.5
Inventory, materials and supplies					56.4
Prepaid expenses					5.6
Other current assets					40.5
Property, plant and equipment					1,950.8
Operating lease right-of-use assets					42.3
Goodwill					651.0
Intangible assets					969.6
Deferred tax assets					6.9
Other noncurrent assets					20.2
Total assets acquired					4,073.0
Liabilities assumed
Current portion of long-term debt					11.8
Accounts payable					381.1
Unearned revenue and customer deposits					51.2
Accrued taxes					24.6
Accrued interest					19.4
Accrued payroll and benefits					49.3
Other current liabilities					75.0
Long-term debt, less current portion					1,378.0
Operating lease liabilities					38.6
Pension and postretirement benefit obligations					151.6
Pole license agreement obligation					46.7
Deferred income tax liability					153.6
Other noncurrent liabilities					71.4
Total liabilities assumed					2,452.3
Net assets acquired					$ 1,620.7
Agile IWG Holdings, LLC [Member]
Assets acquired
Receivables and other current assets			$ 1.8
Property, plant and equipment			10.2
Operating lease right-of-use assets			27.8
Goodwill			35.0
Intangible assets			19.4
Total assets acquired			94.2
Liabilities assumed
Accrued expenses and other current liabilities			2.5
Other noncurrent liabilities			0.5
Operating lease liabilities			25.7
Total liabilities assumed			28.7
Net assets acquired			$ 65.5