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DEBT - Credit Facilities Outstanding (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Jan. 31, 2018
Jun. 21, 2016
Debt Instrument [Line Items]        
Long-term debt $ 26,546,760,000 $ 26,722,342,000    
CSC Holdings Revolving Credit Facility, Portion Due October 9, 2020 | Revolving Credit Facility        
Debt Instrument [Line Items]        
Line of Credit Facility, Maximum Borrowing Capacity   200,000    
CSC Holdings Revolving Credit Facility | Revolving Credit Facility        
Debt Instrument [Line Items]        
Stated interest rate 2.36%      
Line of Credit Facility, Maximum Borrowing Capacity $ 2,475,000,000     $ 2,475,000,000
Credit facility, Carrying Value 893,864,000 616,027,000    
Letters of credit outstanding 139,465,000      
Line of credit facility, remaining borrowing capacity $ 1,435,535,000      
CSC Holdings Term Loan B | Secured Debt [Member]        
Debt Instrument [Line Items]        
Stated interest rate 2.36%      
Credit facility, Carrying Value $ 2,856,421,000 2,884,065,000    
Incremental Term Loan B-2 | Secured Debt [Member]        
Debt Instrument [Line Items]        
Line of Credit Facility, Maximum Borrowing Capacity     $ 1,500,000,000  
Incremental Term Loan B-3 | Secured Debt [Member]        
Debt Instrument [Line Items]        
Stated interest rate 2.36%      
Credit facility, Carrying Value $ 1,236,394,000 1,248,293,000    
Secured Debt [Member]        
Debt Instrument [Line Items]        
Long-term debt $ 1,706,997,000 $ 1,617,506,000