DEBT - Narrative (Details) - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended
DEBT - Narrative (Details) - USD ($)	Jul. 31, 2025	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2024	Jul. 16, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Proceeds from long-term debt			$ 1,835,000,000	$ 3,875,000,000
Repayments of line of credit			577,619,000	$ 3,891,175,000
Principal Amount		$ 26,366,775,000	26,366,775,000			$ 25,096,412,000
2027 Revolving Credit Commitments
Debt Instrument [Line Items]
Line of credit facility, periodic payment amount			95,000
2025 Revolving Credit Commitments
Debt Instrument [Line Items]
Line of credit facility, periodic payment amount			20,000
CSC Holdings 11.7400% Senior Guaranteed Notes due Jan 31, 2029 \| Secured Debt [Member]
Debt Instrument [Line Items]
Principal Amount		$ 2,050,000,000	$ 2,050,000,000
Stated interest rate		11.75%	11.75%
Receivable Facility Loan
Debt Instrument [Line Items]
Principal Amount					$ 1,000,000
Stated interest rate					8.875%
Proceeds from Debt, Net of Issuance Costs	$ 894,063
Receivable Facility Loan \| Secured Debt [Member]
Debt Instrument [Line Items]
Principal Amount		$ 996,167,000	$ 996,167,000			0
Stated interest rate		8.875%	8.875%
Collateral Pledged Payments After January 16, 2028
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	0.050
Collateral Pledged Payments up through January 16, 2028
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	$ 0.020
Revolving Credit Facility \| CSC Holdings Revolving Credit Facility
Debt Instrument [Line Items]
Proceeds from long-term debt			$ 875,000
Repayments of line of credit			450,000
Principal Amount		$ 2,125,000,000	2,125,000,000			1,700,000,000
Line of Credit Facility, Maximum Borrowing Capacity		2,475,000	2,475,000
Letters of credit outstanding		161,514,000	161,514,000
Revolving Credit Facility \| Cablevision Lightpath Revolving Credit Facility
Debt Instrument [Line Items]
Principal Amount		0	$ 0			0
Secured Debt [Member] \| Synthetic LIBOR Rate (one month)
Debt Instrument [Line Items]
Basis spread on variable rate			0.11448%
Secured Debt [Member] \| Synthetic LIBOR Rate (three months)
Debt Instrument [Line Items]
Basis spread on variable rate			0.26161%
Secured Debt [Member] \| Synthetic LIBOR Rate (six months)
Debt Instrument [Line Items]
Basis spread on variable rate			0.42826%
Secured Debt [Member] \| Cablevision Lightpath Term B Loan
Debt Instrument [Line Items]
Principal Amount		670,868,000	$ 670,868,000			676,000,000
Debt Instrument, Issued, Principal			$ 676,000
Secured Debt [Member] \| Cablevision Lightpath Term B Loan \| Alternate base Rate
Debt Instrument [Line Items]
Basis spread on variable rate			2.25%
Secured Debt [Member] \| Cablevision Lightpath Term B Loan \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate			3.25%
Secured Debt [Member] \| Cablevision Lightpath Term B Loan Refinancing Amendment \| Alternate base Rate
Debt Instrument [Line Items]
Basis spread on variable rate			2.00%
Secured Debt [Member] \| Cablevision Lightpath Term B Loan Refinancing Amendment \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate			3.00%
Secured Debt [Member] \| Incremental Term Loan B-5
Debt Instrument [Line Items]
Principal Amount		2,835,000,000	$ 2,835,000,000			$ 2,857,500,000
Line of credit facility, periodic payment amount		7,500,000
Secured Debt [Member] \| Incremental Term Loan B-5 \| Alternate base Rate
Debt Instrument [Line Items]
Basis spread on variable rate			1.50%
Secured Debt [Member] \| Incremental Term Loan B-5 \| Synthetic LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			2.50%
Cablevision Lightpath Revolving Credit Facility \| Cablevision Lightpath Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		115,000	$ 115,000
Letters of credit outstanding		$ 18,538,000	$ 18,538,000

Optimum Communications, Inc. 10-Q