Quarterly report pursuant to Section 13 or 15(d)

Debt (Margin Loan) (Details)

v3.20.2
Debt (Margin Loan) (Details) - Broadband Holdco, LLC - Margin Loan Facility - USD ($)
$ in Millions
9 Months Ended
Aug. 12, 2020
Dec. 27, 2019
Sep. 30, 2020
Line of Credit Facility [Line Items]      
Line of credit, outstanding balance     $ 1,300.0
Revolving Credit Facility      
Line of Credit Facility [Line Items]      
Line of credit availability (up to) $ 200.0    
Proceeds from lines of credit   $ 100.0  
Term Loan Facility      
Line of Credit Facility [Line Items]      
Line of credit availability (up to) 800.0    
Delayed Draw Term Loan Facility      
Line of Credit Facility [Line Items]      
Line of credit availability (up to) $ 300.0    
Proceeds from lines of credit   $ 300.0  
LIBOR      
Line of Credit Facility [Line Items]      
Debt Instrument, Description of Variable Rate Basis LIBOR    
Basis spread on variable rate (as a percent) 1.85%    
Series C Common Stock      
Line of Credit Facility [Line Items]      
Number of shares pledged as collateral (in shares)     42,681,842
Amount of collateral pledged     $ 6,100.0