Mergers and Acquisitions - Purchase Price Allocation (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Sep. 07, 2021
Assets acquired
Goodwill	$ 646.9	$ 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			1,950.7
Operating lease right-of-use assets			42.3
Goodwill			646.3
Intangible assets			969.6
Deferred tax assets			6.9
Other noncurrent assets			20.2
Total assets acquired			4,068.2
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			148.8
Other noncurrent liabilities			71.4
Total liabilities assumed			2,447.5
Net assets acquired			$ 1,620.7