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DEBT - Credit Facilities Narrative (Details) - USD ($) | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jul. 31, 2018 | Jan. 31, 2018 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Line of Credit Facility [Line Items] |  |  |  |  |
Proceeds from credit facility debt, net of discounts |  |  | $ 2,217,500,000 | $ 5,602,425,000 |
Principal Amount |  |  | 6,282,938,000 |  | $ 4,693,675,000
Repayment of credit facility debt |  |  | 635,738,000 | 3,684,668,000 |
Repayments of Senior Debt |  |  | 2,623,756,000 | $ 1,729,400,000 |
CSC Holdings Revolving Credit Facility | Revolving Credit Facility |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Proceeds from credit facility debt, net of discounts | $ 575,000,000 | $ 150,000,000 |  |  |
Principal Amount |  |  | 575,000,000 |  | 450,000,000
Repayment of credit facility debt |  | 600,000,000 |  |  |
CSC Holdings Term Loan Facility | Term Loan |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Principal Amount |  | $ 1,500,000,000 | 2,962,500,000 |  | 2,985,000,000
Debt issued percentage of par |  | 99.50% |  |  |
CSC Holdings Term Loan Facility | Term Loan | Base Rate |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
basis spread on variable rate |  | 1.50% |  |  |
CSC Holdings Term Loan Facility | Term Loan | Eurodollar |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
basis spread on variable rate |  | 2.50% |  |  |
Senior Notes |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Principal Amount |  |  | 15,739,245,000 |  | 16,289,245,000
Senior Notes | CSC Holdings 7.625% Notes due July 15, 2018 [Member] |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Principal Amount |  |  | $ 0 |  | $ 500,000,000
Repayments of Senior Debt | $ 500,000,000 |  |  |  |

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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