BASIS OF PRESENTATION (Policies)	9 Months Ended
BASIS OF PRESENTATION (Policies)	Sep. 30, 2014
BASIS OF PRESENTATION [Abstract]
Basis of Accounting	The accompanying unaudited condensed consolidated financial statements of Cablevision and CSC Holdings have been prepared in accordance with U.S. generally accepted accounting principles ("GAAP") and with the instructions to Form 10-Q and Article 10 of Regulation S-X for interim financial information. Accordingly, these financial statements do not include all the information and notes required for complete annual financial statements.
Principles of Consolidation	The accompanying condensed consolidated financial statements of Cablevision include the accounts of Cablevision and its majority-owned subsidiaries and the accompanying condensed consolidated financial statements of CSC Holdings include the accounts of CSC Holdings and its majority-owned subsidiaries. Cablevision has no business operations independent of its CSC Holdings subsidiary, whose operating results and financial position are consolidated into Cablevision. The condensed consolidated balance sheets and statements of income of Cablevision are essentially identical to the condensed consolidated balance sheets and statements of income of CSC Holdings, with the following significant exceptions: Cablevision has $2,802,509 of senior notes outstanding at September 30, 2014 (excluding the $611,455 aggregate principal amount of Cablevision notes held by its subsidiary Newsday Holdings LLC) that were issued to third party investors, cash, deferred financing costs and accrued interest related to its senior notes, deferred taxes and accrued dividends on its balance sheet. In addition, CSC Holdings and its subsidiaries have certain intercompany receivables from Cablevision. Differences between Cablevision's results of operations and those of CSC Holdings primarily include incremental interest expense, interest income, the write-off of deferred financing costs, net of gain on extinguishment of debt, and income tax expense or benefit. CSC Holdings' results of operations include incremental interest income from the Cablevision senior notes held by Newsday Holdings LLC, which is eliminated in Cablevision's results of operations. The combined notes to the condensed consolidated financial statements relate to the Company, which, except as noted, are essentially identical for Cablevision and CSC Holdings. All significant intercompany transactions and balances between Cablevision and CSC Holdings and their respective consolidated subsidiaries are eliminated in both sets of condensed consolidated financial statements. Intercompany transactions between Cablevision and CSC Holdings are not eliminated in the CSC Holdings condensed consolidated financial statements, but are eliminated in the Cablevision condensed consolidated financial statements.
Use of Estimates in Preparation of Financial Statements	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Recently Adopted Accounting Pronouncements	In July 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. ASU No. 2013-11 eliminates the diversity in practice in the presentation of unrecognized tax benefits either where an entity may present unrecognized tax benefits as a liability or by presenting unrecognized tax benefits as a reduction of a deferred tax asset for a net operating loss or tax credit carryforward in certain circumstances. ASU No. 2013-11 was adopted by the Company on January 1, 2014. ASU No. 2013-11 did not have any impact on the Company's condensed consolidated financial statements.

Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.

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