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FAIR VALUE MEASUREMENT - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Carrying Amount |  |
Liabilities: |  |
Debt, fair value | $ 26,203,749 | $ 26,328,025
Estimated Fair Value |  |
Liabilities: |  |
Debt, fair value | 25,040,459 | 26,449,620
Fair Value, Inputs, Level 2 [Member] | Carrying Amount | Credit facility debt | CSC Holdings |  |
Liabilities: |  |
Debt, fair value | 8,318,764 | 8,495,611
Fair Value, Inputs, Level 2 [Member] | Carrying Amount | Secured Debt [Member] | CSC Holdings |  |
Liabilities: |  |
Debt, fair value | 1,716,600 | 1,706,997
Fair Value, Inputs, Level 2 [Member] | Carrying Amount | Senior guaranteed notes and senior secured notes | CSC Holdings |  |
Liabilities: |  |
Debt, fair value | 8,078,369 | 8,077,372
Fair Value, Inputs, Level 2 [Member] | Carrying Amount | Senior notes | CSC Holdings |  |
Liabilities: |  |
Debt, fair value | 7,957,142 | 7,950,241
Fair Value, Inputs, Level 2 [Member] | Carrying Amount | Notes payable and supply chain financing | CSC Holdings |  |
Liabilities: |  |
Debt, fair value | 132,874 | 97,804
Fair Value, Inputs, Level 2 [Member] | Estimated Fair Value | Credit facility debt | CSC Holdings |  |
Liabilities: |  |
Debt, fair value | 8,366,750 | 8,546,438
Fair Value, Inputs, Level 2 [Member] | Estimated Fair Value | Secured Debt [Member] | CSC Holdings |  |
Liabilities: |  |
Debt, fair value | 1,727,051 | 1,741,710
Fair Value, Inputs, Level 2 [Member] | Estimated Fair Value | Senior guaranteed notes and senior secured notes | CSC Holdings |  |
Liabilities: |  |
Debt, fair value | 7,610,688 | 8,180,813
Fair Value, Inputs, Level 2 [Member] | Estimated Fair Value | Senior notes | CSC Holdings |  |
Liabilities: |  |
Debt, fair value | 7,203,109 | 7,883,071
Fair Value, Inputs, Level 2 [Member] | Estimated Fair Value | Notes payable and supply chain financing | CSC Holdings |  |
Liabilities: |  |
Debt, fair value | 132,861 | 97,588
Fair Value Measured on a Recurring Basis | Fair Value, Inputs, Level 1 [Member] |  |
Assets: |  |
Investment securities |  | 2,161,937
Prepaid forward contracts | Fair Value Measured on a Recurring Basis | Fair Value, Inputs, Level 2 [Member] |  |
Assets: |  |
Derivative asset | 0 | 0
Liabilities: |  |
Derivative liability | 60,868 | 161,942
Interest rate swap contracts | Fair Value Measured on a Recurring Basis | Fair Value, Inputs, Level 2 [Member] |  |
Assets: |  |
Derivative asset | 53,539 | 2,993
Liabilities: |  |
Derivative liability | 30,084 | 118,432
Money market funds | Fair Value Measured on a Recurring Basis | Fair Value, Inputs, Level 1 [Member] |  |
Assets: |  |
Money market funds | $ 131,259 | $ 100,015

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