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Mergers and Acquisitions - Preliminary Fair Values of Identifiable Intangible Assets Acquired (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 07, 2021
Mar. 31, 2022
Dec. 31, 2021
Business Acquisition [Line Items]      
Fair Value $ 963.0 $ 964.4 $ 963.0
Fair Value 6.6    
Fair Value   971.1 969.7
Customer Relationships [Member]      
Business Acquisition [Line Items]      
Fair Value   $ 851.1 850.0
Useful Lives   15 years  
Trade Names [Member]      
Business Acquisition [Line Items]      
Fair Value   $ 108.3 108.0
Trade Names [Member] | Minimum [Member]      
Business Acquisition [Line Items]      
Useful Lives   3 years  
Trade Names [Member] | Maximum [Member]      
Business Acquisition [Line Items]      
Useful Lives   10 years  
Technology [Member]      
Business Acquisition [Line Items]      
Fair Value   $ 5.0 $ 5.0
Useful Lives   7 years  
Cincinnati Bell Inc. [Member]      
Business Acquisition [Line Items]      
Fair Value 969.6    
Cincinnati Bell Inc. [Member] | Customer Relationships [Member]      
Business Acquisition [Line Items]      
Fair Value $ 850.0    
Useful Lives 15 years    
Cincinnati Bell Inc. [Member] | Trade Names [Member]      
Business Acquisition [Line Items]      
Fair Value $ 108.0    
Cincinnati Bell Inc. [Member] | Trade Names [Member] | Minimum [Member]      
Business Acquisition [Line Items]      
Useful Lives 3 years    
Cincinnati Bell Inc. [Member] | Trade Names [Member] | Maximum [Member]      
Business Acquisition [Line Items]      
Useful Lives 10 years    
Cincinnati Bell Inc. [Member] | Technology [Member]      
Business Acquisition [Line Items]      
Fair Value $ 5.0    
Useful Lives 7 years    
Cincinnati Bell Inc. [Member] | FCC Licenses and Spectrum Usage Rights [Member]      
Business Acquisition [Line Items]      
Fair Value $ 6.6