Altice USA (ATUS) 10-Q 6 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 27, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	Altice USA, Inc.
Entity Central Index Key	1,702,780
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Entity Common Stock, Shares Outstanding		737,068,966

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 550,131	$ 486,792
Restricted cash	45,205	16,301
Accounts receivable, trade (less allowance for doubtful accounts of $14,018 and $11,677)	344,742	349,626
Prepaid expenses and other current assets (including a prepayment to an affiliate of $11,296 in 2017) (See Note 14)	109,652	88,151
Amounts due from affiliates	21,153	22,182
Investment securities pledged as collateral	0	741,515
Derivative contracts	54,578	352
Total current assets	1,125,461	1,704,919
Property, plant and equipment, net of accumulated depreciation of $2,181,306 and $1,039,297	6,161,511	6,597,635
Investment in affiliates	1,694	5,606
Investment securities pledged as collateral	1,652,917	741,515
Derivative contracts	0	10,604
Other assets (including a prepayment to an affiliate of $2,570 in 2017) (See Note 14)	49,394	48,545
Amortizable intangible assets, net of accumulated amortization	5,426,595
Indefinite-lived cable television franchises	13,020,081	13,020,081
Goodwill	7,993,499	7,992,700
Total assets	35,431,152	36,474,249
Current Liabilities:
Accounts payable	685,026	705,672
Interest	315,467	576,778
Employee related costs	130,640	232,864
Other accrued expenses	412,949	352,315
Amounts due to affiliates	29,002	127,363
Deferred revenue	101,577	94,816
Liabilities under derivative contracts	102,904	13,158
Collateralized indebtedness	0	622,332
Credit facility debt	92,650	33,150
Senior notes and debentures	1,572,358	926,045
Capital lease obligations	10,376	15,013
Notes payable	30,211	5,427
Total current liabilities	3,483,160	3,704,933
Defined benefit plan obligations	93,849	84,106
Notes payable to affiliates and related parties	0	1,750,000
Other liabilities	144,601	113,485
Deferred tax liability	7,194,065	7,966,815
Liabilities under derivative contracts	121,759	78,823
Collateralized indebtedness	1,314,788	663,737
Credit facility debt	5,284,252	3,411,640
Senior notes and debentures	14,280,817	16,581,280
Capital lease obligations	5,857	13,142
Notes payable	49,314	8,299
Total liabilities	31,972,462	34,376,260
Commitments and contingencies
Redeemable equity	390,268	68,147
Stockholders' Equity:
Preferred Stock, $.01 par value, 100,000,000 shares authorized, no shares issued and outstanding at September 30, 2017	0	0
Common stock	0	0
Paid-in capital	4,466,040	3,003,554
Accumulated deficit	(1,401,548)	(975,978)
Total stockholders' equity before accumulated other comprehensive Income and non-controlling interest	3,071,863	2,027,576
Accumulated other comprehensive income (loss)	(4,130)	1,979
Total stockholders' equity	3,067,733	2,029,555
Noncontrolling interest	689	287
Total stockholders' equity	3,068,422	2,029,842
Total liabilities and stockholders' equity	35,431,152	36,474,249
Common Class A
Stockholders' Equity:
Common stock	2,470	0
Common Class B
Stockholders' Equity:
Common stock	4,901	0
Common Class C
Stockholders' Equity:
Common stock	0	0
Customer relationships
Current Assets:
Amortizable intangible assets, net of accumulated amortization	4,763,667	5,345,608
Trade names
Current Assets:
Amortizable intangible assets, net of accumulated amortization	634,681	983,386
Amortizable intangible assets
Current Assets:
Amortizable intangible assets, net of accumulated amortization	$ 28,247	$ 23,650

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current Assets:
Accounts receivable, trade allowance for doubtful accounts	$ 14,018	$ 11,677
Prepayment to affiliate included in other assets	109,652	88,151
Property, plant and equipment, accumulated depreciation	2,181,306	$ 1,039,297
Amortizable intangible assets, accumulated amortization	$ 1,648,424
Stockholders' Equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)		$ 0.01
Common stock, shares authorized (in shares)		1,000
Common stock, shares issued (in shares)		100
Common stock, shares outstanding (in shares)		100
Common Class A
Stockholders' Equity:
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	4,000,000,000
Common stock, shares issued (in shares)	246,982,292
Common stock, shares outstanding (in shares)	246,982,292
Common Class B
Stockholders' Equity:
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000
Common stock, shares issued (in shares)	490,086,674
Common stock, shares outstanding (in shares)	490,086,674
Common Class C
Stockholders' Equity:
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	4,000,000,000
Common stock, shares issued (in shares)	0
Common stock, shares outstanding (in shares)	0
Customer relationships
Current Assets:
Amortizable intangible assets, accumulated amortization	$ 1,207,217	$ 580,276
Trade names
Current Assets:
Amortizable intangible assets, accumulated amortization	432,402	83,397
Amortizable intangible assets
Current Assets:
Amortizable intangible assets, accumulated amortization	8,805	$ 3,093
Affiliates
Current Assets:
Prepayment to affiliate included in other assets	$ 11,296

CONSOLIDATED STATEMENT OF OPERA

CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue (including revenue from affiliates of $986 and $1,380 in 2017 and $720 in both 2016 periods) (See Note 14)	$ 2,327,175	$ 2,260,221	$ 6,961,192	$ 3,711,311
Operating expenses:
Programming and other direct costs (including charges from affiliates of $1,196 and $3,026 in 2017 and $642 in both 2016 periods) (See Note 14)	755,101	738,390	2,272,147	1,177,808
Other operating expenses (including charges from affiliates of $28,332 and $73,263 in 2017 and $8,056 and $13,056 in 2016) (See Note 14)	560,497	660,307	1,767,624	1,050,046
Restructuring and other expense	53,448	47,816	142,765	155,086
Depreciation and amortization (including impairments)	823,265	670,929	2,138,776	1,085,929
Total operating expenses	2,192,311	2,117,442	6,321,312	3,468,869
Operating income	134,864	142,779	639,880	242,442
Other income (expense):
Interest expense (including interest expense to affiliates and related parties of $90,405 in 2017 and $48,617 and $53,922 in 2016) (See Note 14)	(379,064)	(446,242)	(1,232,730)	(1,015,866)
Interest income	961	404	1,373	12,787
Gain (loss) on investments, net	(18,900)	24,833	169,888	83,467
Gain (loss) on derivative contracts, net	(16,763)	773	(154,270)	(26,572)
Gain (loss) on interest rate swap contracts	1,051	(15,861)	12,539	24,380
Loss on extinguishment of debt and write-off of deferred financing costs (including $513,723 related to affiliates and related parties for the nine months ended September 30, 2017) (See Note 14)	(38,858)	0	(600,240)	(19,948)
Other income (expense), net	(65)	2,531	832	2,548
Total other income (expense)	(451,638)	(433,562)	(1,802,608)	(939,204)
Loss before income taxes	(316,774)	(290,783)	(1,162,728)	(696,762)
Income tax benefit	134,688	118,230	429,664	101,332
Net loss	(182,086)	(172,553)	(733,064)	(595,430)
Net loss (income) attributable to noncontrolling interests	(135)	(256)	(737)	108
Net loss attributable to Altice USA, Inc. stockholders	$ (182,221)	$ (172,809)	$ (733,801)	$ (595,322)
Basic and diluted net loss per share (in dollars per share)	$ (0.25)	$ (0.27)	$ (1.08)	$ (0.92)
Basic and diluted weighted average common shares (in shares)	737,069,000	649,525,000	682,234,000	649,524,942

CONSOLIDATED STATEMENT OF OPER5

CONSOLIDATED STATEMENT OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue from affiliates	$ 986	$ 720	$ 1,380	$ 720
Programming and other direct costs from affiliates	1,196	642	3,026	642
Related Party Transaction, Other Operating Expense	28,332	8,056	73,263	13,056
Interest expense to related parties and affiliates	0	48,617	90,405	53,922
Loss on extinguishment of debt and write-off of deferred financing costs	$ 0	$ 0	$ (513,723)	$ 0

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (182,086)	$ (172,553)	$ (733,064)	$ (595,430)
Defined benefit pension plans:
Unrecognized actuarial gain (loss)	(4,056)	5,016	(8,389)	4,034
Applicable income taxes	1,622	(2,006)	3,356	(1,613)
Unrecognized gain (loss) arising during period, net of income taxes	(2,434)	3,010	(5,033)	2,421
Curtailment loss, net of settlement losses of $1,014 and $1,403 for the three and nine months ended September 30, 2017 included in net periodic benefit cost	1,014	(33)	(1,792)	(33)
Applicable income taxes	(406)	13	716	13
Curtailment loss, net of settlement losses included in net periodic benefit cost, net of income taxes	608	(20)	(1,076)	(20)
Other comprehensive gain (loss)	(1,826)	2,990	(6,109)	2,401
Comprehensive loss	(183,912)	(169,563)	(739,173)	(593,029)
Comprehensive loss (income) attributable to noncontrolling interests	(135)	(256)	(737)	108
Comprehensive loss attributable to Altice USA, Inc. stockholders	$ (184,047)	$ (169,819)	$ (739,910)	$ (592,921)

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Settlement loss (gain) related to pension plan	$ 1,014	$ 1,403	$ (33)

CONSOLIDATED STATEMENT OF STOCK

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	IPO	Total Stockholders' Equity	Total Stockholders' EquityIPO	Paid-in Capital	Paid-in CapitalIPO	Accumulated Deficit	Accumulated Other Comprehensive Income	Non-controlling Interest	Common Class ACommon Stock	Common Class ACommon StockIPO	Common Class BCommon Stock
Beginning balance at Dec. 31, 2016	$ 2,029,842		$ 2,029,555		$ 3,003,554		$ (975,978)	$ 1,979	$ 287	$ 0		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss attributable to stockholders	(733,801)		(733,801)				(733,801)
Net income attributable to noncontrolling interests	737								737
Pension liability adjustments, net of income taxes	(6,109)		(6,109)					(6,109)
Share-based compensation expense	40,932		40,932		40,932
Change in fair value of redeemable equity	(322,121)		(322,121)		(322,121)
Contributions from stockholders	1,135		1,135		1,135
Cash distributions to stockholders	(840,035)		(839,700)		(839,700)				(335)
Transfer of goodwill	(23,101)		(23,101)		(23,101)
Recognition of previously unrealized excess tax benefits related to share-based awards in connection with the adoption of ASU 2016-09	308,231		308,231				308,231
Issuance of common stock pursuant to IPO	2,264,252	$ 348,460	2,264,252	$ 348,460	2,257,002	$ 348,339				2,349	$ 121	4,901
Ending balance at Sep. 30, 2017	$ 3,068,422		$ 3,067,733		$ 4,466,040		$ (1,401,548)	$ (4,130)	$ 689	$ 2,470		$ 4,901

CONSOLIDATED STATEMENT OF CASH

CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net loss	$ (733,064)	$ (595,430)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization (including impairments)	2,138,776	1,085,929
Gain on sale of affiliate interests	0	(206)
Equity in net loss of affiliates	5,697	400
Gain on investments, net	(169,888)	(83,467)
Loss on derivative contracts, net	154,270	26,572
Loss on extinguishment of debt and write-off of deferred financing costs	600,240	19,948
Amortization of deferred financing costs and discounts (premiums) on indebtedness	18,517	25,831
Settlement loss (gain) related to pension plan	1,403	(33)
Share-based compensation expense	40,932	1,670
Deferred income taxes	(458,608)	(105,468)
Excess tax benefit on share-based awards	0	82
Provision for doubtful accounts	54,501	32,569
Change in assets and liabilities, net of effects of acquisitions and dispositions:
Accounts receivable, trade	(45,493)	(39,651)
Other receivables	(5,517)	9,203
Prepaid expenses and other assets	(13,275)	27,142
Amounts due from and due to affiliates	(97,440)	(213)
Accounts payable	50,649	37,472
Accrued liabilities	(324,537)	103,409
Deferred revenue	9,382	9,549
Liabilities related to interest rate swap contracts	(9,552)	(24,380)
Net cash provided by operating activities	1,216,993	530,928
Cash flows from investing activities:
Payment for acquisition, net of cash acquired	(43,608)	(8,988,774)
Net proceeds from sale of affiliate interests	0	13,825
Capital expenditures	(763,298)	(377,726)
Proceeds related to sale of equipment, including costs of disposal	3,398	1,584
Increase in other investments	(4,800)	(2,866)
Settlement of put-call options	(24,039)	0
Additions to other intangible assets	(1,700)	0
Net cash used in investing activities	(834,047)	(9,353,957)
Cash flows from financing activities:
Proceeds from credit facility debt	5,602,425	2,195,256
Repayment of credit facility debt	(3,684,668)	(4,327,466)
Proceeds from notes payable to affiliates and related parties	0	1,750,000
Issuance of senior notes and debentures	0	1,310,000
Proceeds from collateralized indebtedness	662,724	179,388
Repayment of collateralized indebtedness and related derivative contracts	(654,989)	(143,102)
Distributions to stockholders	(839,700)	0
Proceeds from notes payable	(1,729,400)	0
Proceeds from notes payable	24,649	0
Excess tax benefit on share-based awards	0	(82)
Principal payments on capital lease obligations	(11,518)	(11,376)
Additions to deferred financing costs	(9,486)	(193,705)
Proceeds from IPO, net of fees	348,460	0
Contributions from stockholders	1,135	1,246,498
Distributions to noncontrolling interests, net	335	0
Net cash provided by (used in) financing activities	(290,703)	2,005,411
Net increase (decrease) in cash and cash equivalents	92,243	(6,817,618)
Cash, cash equivalents and restricted cash at beginning of year	503,093	8,786,536
Cash, cash equivalents and restricted cash at end of period	$ 595,336	$ 1,968,918

DESCRIPTION OF BUSINESS AND REL

DESCRIPTION OF BUSINESS AND RELATED MATTERS	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS AND RELATED MATTERS	DESCRIPTION OF BUSINESS AND RELATED MATTERS The Company and Related Matters Altice USA, Inc. ("Altice USA" or the "Company") was incorporated in Delaware on September 14, 2015 . As of September 30, 2017 , Altice USA is majority‑owned by Altice N.V., a public company with limited liability (naamloze vennootshcap) under Dutch law ("Altice N.V."). Altice N.V., though a subsidiary, acquired Cequel Corporation ("Cequel" or "Suddenlink") on December 21, 2015 and Cequel was contributed to Altice USA on June 9, 2016 . Altice USA had no operations of its own other than the issuance of debt prior to the contribution of Cequel on June 9, 2016 by Altice N.V. The results of operations of Cequel for the three and nine months ended September 30, 2016 have been included in the results of operations of Altice USA for the same periods, as Cequel was under common control with Altice USA. Altice USA acquired Cablevision Systems Corporation ("Cablevision" or "Optimum") on June 21, 2016 (see discussion below) and the results of operations of Cablevision are included with the results of operations of Cequel for the three and nine months ended September 30, 2017 . The three and nine months ended September 30, 2016 operating results include the operating results of Cablevision from the date of acquisition, June 21, 2016. The Company classifies its operations into two reportable segments: Cablevision, which operates in the New York metropolitan area, and Cequel, which principally operates in markets in the south‑central United States. Initial Public Offering In June 2017, the Company completed its initial public offering ("IPO") of 71,724,139 shares of its Class A common stock ( 12,068,966 shares sold by the Company and 59,655,173 shares sold by existing stockholders) at a price to the public of $30.00 per share, including the underwriters full exercise of their option to purchase 7,781,110 shares to cover overallotments. At the date of the IPO, Altice N.V. owned approximately 70.2% of the Company's issued and outstanding common stock, which represented approximately 98.2% of the voting power of the Company's outstanding common stock. The Company’s Class A common stock began trading on June 22, 2017, on the New York Stock Exchange under the symbol "ATUS". In connection with the sale of its Class A common stock, the Company received proceeds of approximately $362,069 , before deducting the underwriting discount and expenses directly related to the issuance of the securities of $13,609 . The Company did not receive any proceeds from the sale of shares by the selling stockholders. In July 2017, the Company used approximately $350,120 of the proceeds to fund the redemption of $315,779 principal amount of 10.875% senior notes that mature in 2025 issued by CSC Holdings, an indirect wholly-owned subsidiary of the Company, and the related call premium of approximately $34,341 . The following organizational transactions were consummated prior to the IPO: • the Company amended and restated its certificate of incorporation to, among other things, provide for Class A common stock, Class B common stock and Class C common stock; • BC Partners LLP ("BCP") and Canada Pension Plan Investment Board (‘‘CPPIB and together with BCP, the‘‘Co-Investors’’) and Uppernext S.C.S.p. ("Uppernext"), an entity controlled by Mr. Patrick Drahi (founder and controlling stockholder of Altice N.V.), exchanged their indirect ownership interest in the Company for shares of the Company’s common stock; • Neptune Management LP (‘‘Management LP’’) redeemed its Class B units for shares of the Company’s common stock that it received from the redemption of its Class B units in Neptune Holding US LP; • the Company converted $525,000 aggregate principal amount of notes issued by the Company to the Co-Investors (together with accrued and unpaid interest and applicable premium) into shares of the Company’s common stock at the IPO price (see Note 9 for further details); • $1,225,000 aggregate principal amount of notes issued by the Company to a subsidiary of Altice N.V. (together with accrued and unpaid interest and applicable premium) was transferred to CVC 3 B.V., an indirect subsidiary of Altice N.V. ("CVC 3") and then the Company converted such notes into shares of the Company’s common stock at the IPO price (see Note 9 for further details); • the Co-Investors, Neptune Holding US LP, A4 S.A. (an entity controlled by the family of Mr. Drahi), and former Class B unitholders of Management LP (including Uppernext) exchanged shares of the Company’s common stock for new shares of the Company’s Class A common stock; and • CVC 3 and A4 S.A. exchanged shares of the Company’s common stock for new shares of the Company’s Class B common stock. Acquisition of Cablevision Systems Corporation On June 21, 2016 (the "Cablevision Acquisition Date"), pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), dated as of September 16, 2015 , by and among Cablevision, Altice N.V., Neptune Merger Sub Corp., a wholly-owned subsidiary of Altice N.V. ("Merger Sub"), Merger Sub merged with and into Cablevision, with Cablevision surviving the merger (the "Cablevision Acquisition"). In connection with the Cablevision Acquisition, each outstanding share of the Cablevision NY Group Class A common stock, par value $0.01 per share ("CNYG Class A Shares"), and Cablevision NY Group Class B common stock, par value $0.01 per share ("CNYG Class B Shares", and together with the CNYG Class A Shares, the "Shares"), and together with the Cablevision NY Group Class A common stock, the "Shares" other than Shares owned by Cablevision, Altice N.V. or any of their respective wholly-owned subsidiaries, in each case not held on behalf of third parties in a fiduciary capacity, received $34.90 in cash without interest, less applicable tax withholdings (the "Cablevision Acquisition Consideration"). Pursuant to an agreement, dated December 21, 2015 , by and among CVC 2 B.V., CIE Management IX Limited, for and on behalf of the limited partnerships BC European Capital IX-1 through 11 and Canada Pension Plan Investment Board, certain affiliates of BCP and CPPIB (the "Co-Investors") funded approximately $1,000,000 toward the payment of the aggregate Per Share Cablevision Acquisition Consideration, and indirectly acquired approximately 30% of the Shares of Cablevision. Also in connection with the Cablevision Acquisition, outstanding equity-based awards granted under Cablevision’s equity plans were cancelled and converted into cash based upon the $34.90 per Share Cablevision Acquisition Consideration in accordance with the original terms of the awards. The total consideration for the outstanding CNYG Class A Shares, the outstanding CNYG Class B Shares, and the equity-based awards amounted to $9,958,323 . In connection with the Cablevision Acquisition, in October 2015, Neptune Finco Corp. ("Finco"), an indirect wholly-owned subsidiary of Altice N.V. formed to complete the financing described herein and the merger with CSC Holdings, LLC ("CSC Holdings"), a wholly-owned subsidiary of Cablevision, borrowed an aggregate principal amount of $3,800,000 under a term loan facility (the "Term Credit Facility") and entered into revolving loan commitments in an aggregate principal amount of $2,000,000 (the "Revolving Credit Facility" and, together with the Term Credit Facility, the "Credit Facilities"). Finco also issued $1,800,000 aggregate principal amount of 10.125% senior notes due 2023 (the "2023 Notes"), $2,000,000 aggregate principal amount of 10.875% senior notes due 2025 (the "2025 Notes"), and $1,000,000 aggregate principal amount of 6.625% senior guaranteed notes due 2025 (the "2025 Guaranteed Notes") (collectively the "Cablevision Acquisition Notes"). On June 21, 2016 , immediately following the Cablevision Acquisition, Finco merged with and into CSC Holdings, with CSC Holdings surviving the merger (the "CSC Holdings Merger"), and the Cablevision Acquisition Notes and the Credit Facilities became obligations of CSC Holdings. On June 21, 2016 , in connection with the Cablevision Acquisition, the Company issued notes payable to affiliates and related parties aggregating $1,750,000 , of which $875,000 bear interest at 10.75% and $875,000 bear interest at 11% . See Note 9 for a discussion regarding the conversion of these notes payable to shares of the Company's common stock prior to the consummation of the IPO. The Cablevision Acquisition was accounted for as a business combination in accordance with ASC Topic 805. Accordingly, the Company stepped up 100% of the assets and liabilities assumed to their fair value at the Cablevision Acquisition Date. See Note 3 for further details. Acquisition of Cequel Corporation On December 21, 2015 , Altice N.V., though a subsidiary, acquired approximately 70% of the total outstanding equity interests in Cequel (the "Cequel Acquisition") from the direct and indirect stockholders of Cequel Corporation (the "Sellers"). The consideration for the acquired equity interests, which was based on a total equity valuation for 100% of the capital and voting rights of Cequel, was $3,973,528 , including $2,797,928 of cash consideration, $675,600 of retained equity held by entities affiliated with BC Partners and CPPIB and $500,000 funded by the issuance by an affiliate of Altice N.V. of a senior vendor note that was subscribed by entities affiliated with BC Partners and CPPIB. Following the closing of the Cequel Acquisition, entities affiliated with BC Partners and CPPIB retained a 30% equity interest in a parent entity of the Company. In addition, the carried interest plans of the stockholders were cashed out whereby payments were made to participants in such carried interest plans, including certain officers and directors of Cequel.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The accompanying unaudited consolidated financial statements of the Company 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. The interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2016 included in the Company's final prospectus dated June 21, 2017 and filed with the Securities and Exchange Commission ("SEC") in accordance with Rule 424(b) of the Securities Act of 1933, as amended (the "Securities Act") on June 23, 2017 (the "Prospectus"). The financial statements presented in this report are unaudited; however, in the opinion of management, such financial statements include all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the results for the periods presented. The results of operations for the interim periods are not necessarily indicative of the results that might be expected for future interim periods or for the full year ending December 31, 2017 . 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 revenue and expenses during the reporting period. Actual results could differ from those estimates. Recently Adopted Accounting Pronouncement In March 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-09, Compensation—Stock Compensation: Improvements to Employee Share-Based Payment Accounting, which provides simplification of income tax accounting for share-based payment awards. The new guidance became effective for the Company on January 1, 2017. Amendments related to the timing of when excess tax benefits are recognized, minimum statutory withholding requirements, forfeitures, and intrinsic value will be applied using the modified retrospective transition method. Amendments requiring recognition of excess tax benefits and tax deficiencies in the income statement and the practical expedient for estimating expected term were applied prospectively. The Company elected to apply the amendments related to the presentation of excess tax benefits on the statement of cash flows using the prospective transition method. In connection with the adoption on January 1, 2017, a deferred tax asset of approximately $308,231 for previously unrealized excess tax benefits was recognized with the offset recorded to accumulated deficit. Recently Issued But Not Yet Adopted Accounting Pronouncements In May 2017, the FASB issued ASU No. 2017‑09, Compensation- Stock Compensation (Topic 718). ASU No. 2017‑09 provides clarity and guidance on which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. ASU No. 2017‑09 becomes effective for the Company on January 1, 2018 with early adoption permitted and will be applied prospectively. In March 2017, the FASB issued ASU No. 2017‑07 Compensation-Retirement Benefits (Topic 715). ASU No. 2017‑07 requires that an employer disaggregate the service cost component from the other components of net benefit cost. It also provides guidance on how to present the service cost component and the other components of net benefit cost in the income statement and what component of net benefit cost is eligible for capitalization. ASU No. 2017‑07 becomes effective for the Company on January 1, 2018 with early adoption permitted and will be applied retrospectively. The Company has not yet completed the evaluation of the effect that ASU No. 2017‑07 will have on its consolidated financial statements. In January 2017, the FASB issued ASU No. 2017‑04, Intangibles-Goodwill and Other (Topic 350). ASU No. 2017‑04 simplifies the subsequent measurement of goodwill by removing the second step of the two‑step impairment test. The amendment requires an entity to perform its annual, or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. ASU No. 2017‑04 becomes effective for the Company on January 1, 2020 with early adoption permitted and will be applied prospectively. In January 2017, the FASB issued ASU No. 2017‑01, Business Combinations (Topic 805), Clarifying the Definition of a Business, which amends Topic 805 to interpret the definition of a business by adding guidance to assist in evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The new guidance becomes effective for the Company on January 1, 2018 with early adoption permitted and will be applied prospectively. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments which clarifies how entities should classify certain cash receipts and cash payments on the statement of cash flows. ASU No. 2016-15 also clarifies how the predominance principle should be applied when cash receipts and cash payments have aspects of more than one class of cash flows. The new guidance becomes effective for the Company on January 1, 2018 with early adoption permitted and will be applied retrospectively. The Company has not yet completed the evaluation of the effect that ASU No. 2016-15 will have on its consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases , which increases transparency and comparability by recognizing a lessee’s rights and obligations resulting from leases by recording them on the balance sheet as lease assets and lease liabilities. The new guidance becomes effective for the Company on January 1, 2019 with early adoption permitted and will be applied using the modified retrospective method. The Company has not yet completed the evaluation of the effect that ASU No. 2016-02 will have on its consolidated financial statements. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities. ASU No. 2016-01 modifies how entities measure certain equity investments and also modifies the recognition of changes in the fair value of financial liabilities measured under the fair value option. Entities will be required to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair value and recognize any changes in fair value in net income. For financial liabilities measured using the fair value option, entities will be required to record changes in fair value caused by a change in instrument-specific credit risk (own credit risk) separately in other comprehensive income. ASU No. 2016-01 becomes effective for the Company on January 1, 2018. The Company has not yet completed the evaluation of the effect that ASU No. 2016-01 will have on its consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, requiring an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU No. 2014-09 will replace most existing revenue recognition guidance in GAAP when it becomes effective and allows the use of either the retrospective or cumulative effect transition method. In August 2015, the FASB issued ASU No. 2015-14 that approved deferring the effective date by one year so that ASU No. 2014-09 would become effective for the Company on January 1, 2018. The FASB also approved, in July 2015, permitting the early adoption of ASU No. 2014-09, but not before the original effective date for the Company of January 1, 2017. In December 2016, the FASB issued ASU No. 2016-20, Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers, in order to clarify the Codification and to correct any unintended application of the guidance. These items are not expected to have a significant effect on the current accounting standard. The amendments in this update affect the guidance in ASU No. 2014-09, which is not yet effective. ASU No. 2014-09 will be effective January 1, 2018 for the Company, reflecting the one-year deferral. Early adoption of the standard is permitted but not before the original effective date. Companies can transition to the standard either retrospectively or as a cumulative-effect adjustment as of the date of adoption. The Company is in the process of evaluating the impact that the adoption of ASU No. 2014-09 will have on its consolidated financial statements and selecting the method of transition to the new standard. The Company currently expects the adoption to impact the timing of the recognition of residential installation revenue and the recognition of commission expenses. Reclassifications Certain reclassifications have been made to the 2016 financial statements to conform to the 2017 presentation.

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
BUSINESS COMBINATIONS	BUSINESS COMBINATIONS Cablevision Acquisition As discussed in Note 1, the Company completed the Cablevision Acquisition on June 21, 2016 . The acquisition was accounted for as a business combination in accordance with ASC Topic 805. Accordingly, the Company recorded the fair value of the assets and liabilities assumed at the date of acquisition. The following table provides the allocation of the total purchase price of $9,958,323 to the identifiable tangible and intangible assets and liabilities of Cablevision based on their respective fair values. The remaining useful lives represent the period over which acquired tangible and intangible assets with a finite life are being depreciated or amortized. Fair Values Estimated Useful Lives Current assets $ 1,923,071 Accounts receivable 271,305 Property, plant and equipment 4,864,621 2-18 years Goodwill 5,842,172 Indefinite-lived cable television franchises 8,113,575 Indefinite-lived Customer relationships 4,850,000 8 to 18 years Trade names (a) 1,010,000 12 years Amortizable intangible assets 23,296 1-15 years Other non-current assets 748,998 Current liabilities (2,311,201 ) Long-term debt (8,355,386 ) Deferred income taxes. (6,832,773 ) Other non-current liabilities (189,355 ) Total $ 9,958,323 (a) See Note 8 for additional information regarding a change in the remaining estimated useful lives of the Company's trade names. The fair value of customer relationships and cable television franchises were valued using derivations of the "income" approach. The future expected earnings from these assets were discounted to their present value equivalent. Trade names were valued using the relief from royalty method, which is based on the present value of the royalty payments avoided as a result of the company owning the intangible asset. The basis for the valuation methods was the Company’s projections. These projections were based on management’s assumptions including among others, penetration rates for video, high speed data, and voice; revenue growth rates; operating margins; and capital expenditures. The assumptions are derived based on the Company’s and its peers’ historical operating performance adjusted for current and expected competitive and economic factors surrounding the cable industry. The discount rates used in the analysis are intended to reflect the risk inherent in the projected future cash flows generated by the respective intangible asset. The value is highly dependent on the achievement of the future financial results contemplated in the projections. The estimates and assumptions made in the valuation are inherently subject to significant uncertainties, many of which are beyond the Company's control, and there is no assurance that these results can be achieved. The primary assumptions for which there is a reasonable possibility of the occurrence of a variation that would have significantly affected the value include the assumptions regarding revenue growth, programming expense growth rates, the amount and timing of capital expenditures and the discount rate utilized. In establishing fair value for the vast majority of the acquired property, plant and equipment, the cost approach was utilized. The cost approach considers the amount required to replace an asset by constructing or purchasing a new asset with similar utility, then adjusts the value in consideration of physical depreciation, and functional and economic obsolescence as of the appraisal date. The cost approach relies on management’s assumptions regarding current material and labor costs required to rebuild and repurchase significant components of our property, plant and equipment along with assumptions regarding the age and estimated useful lives of our property, plant and equipment. The estimates of expected useful lives take into consideration the effects of contractual relationships, customer attrition, eventual development of new technologies and market competition. Long-term debt assumed was valued using quoted market prices (Level 2). The carrying value of most other assets and liabilities approximated fair value as of the acquisition date. As a result of applying business combination accounting, the Company recorded goodwill, which represented the excess of organization value over amounts assigned to the other identifiable tangible and intangible assets arising from expectations of future operational performance and cash generation. The following table presents the unaudited pro forma revenue and net loss for the period presented as if the Cablevision Acquisition had occurred on January 1, 2016: Nine Months Ended September 30, 2016 Revenue $ 6,848,916 Net loss $ (527,851 ) The pro forma results presented above include the impact of additional amortization expense related to the identifiable intangible assets recorded in connection with the Cablevision Acquisition, additional depreciation expense related to the fair value adjustment to property, plant and equipment and the incremental interest resulting from the issuance of debt to fund the Cablevision Acquisition, net of the reversal of interest and amortization of deferred financing costs related to credit facilities that were repaid on the date of the Cablevision Acquisition and the accretion/amortization of fair value adjustments associated with the long-term debt acquired. Acquisition In connection with the acquisition of an entity in the first quarter of 2017, the Company recorded amortizable intangibles of $45,000 relating to customer relationships and $9,400 relating to other amortizable intangibles. The Company recorded goodwill of $20,687 , which represents the excess of the purchase price of approximately $75,000 over the net book value of assets acquired. These values are based on preliminary fair value information currently available, which is subject to change within the measurement period (up to one year from the acquisition date). The acquired entity is included in the Cablevision segment.

NET LOSS PER SHARE ATTRIBUTABLE

NET LOSS PER SHARE ATTRIBUTABLE TO STOCKHOLDERS	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
NET LOSS PER SHARE ATTRIBUTABLE TO STOCKHOLDERS	NET LOSS PER SHARE ATTRIBUTABLE TO STOCKHOLDERS Basic and diluted net loss per common share attributable to Altice USA stockholders is computed by dividing net loss attributable to Altice USA stockholders by the weighted average number of common shares outstanding during the period. Diluted net loss per common share attributable to Altice USA stockholders excludes the effects of common stock equivalents as they are anti-dilutive. The basic weighted average number of shares used to compute basic and diluted net loss per share reflect the retroactive impact of the organizational transactions, discussed in Note 1, that occurred prior to the Company's IPO and the shares of common stock issued pursuant to the Company's IPO.

GROSS VERSUS NET REVENUE RECOGN

GROSS VERSUS NET REVENUE RECOGNITION	9 Months Ended
	Sep. 30, 2017
Revenue Recognition [Abstract]
GROSS VERSUS NET REVENUE RECOGNITION	GROSS VERSUS NET REVENUE RECOGNITION In the normal course of business, the Company is assessed non-income related taxes by governmental authorities, including franchising authorities (generally under multi-year agreements), and collects such taxes from its customers. The Company's policy is that, in instances where the tax is being assessed directly on the Company, amounts paid to the governmental authorities and amounts received from the customers are recorded on a gross basis. That is, amounts paid to the governmental authorities are recorded as programming and other direct costs and amounts received from the customer are recorded as revenue. For the three and nine months ended September 30, 2017, the amount of franchise fees and certain other taxes and fees included as a component of revenue aggregated $64,254 and $194,045 , respectively. For the three and nine months ended September 30, 2016, the amount of franchise fees and certain other taxes and fees included as a component of revenue aggregated $62,249 and $92,146 , respectively.

SUPPLEMENTAL CASH FLOW INFORMAT

SUPPLEMENTAL CASH FLOW INFORMATION	9 Months Ended
	Sep. 30, 2017
Supplemental Cash Flow Elements [Abstract]
SUPPLEMENTAL CASH FLOW INFORMATION	SUPPLEMENTAL CASH FLOW INFORMATION The Company considers the balance of its investment in funds that substantially hold securities that mature within three months or less from the date the fund purchases these securities to be cash equivalents. The carrying amount of cash and cash equivalents either approximates fair value due to the short-term maturity of these instruments or are at fair value. The Company's non-cash investing and financing activities and other supplemental data were as follows: Nine Months Ended September 30, 2017 2016 Non-Cash Investing and Financing Activities: Continuing Operations: Conversion of notes payable to affiliates and related parties of $1,750,000 (together with accrued and unpaid interest and applicable premium) to common stock (See Note 9) $ 2,264,252 $ — Property and equipment accrued but unpaid 84,847 83,722 Leasehold improvements paid by landlord 3,998 — Notes payable to vendor 25,879 — Supplemental Data: Cash interest paid 1,481,363 931,345 Income taxes paid, net 26,396 5,342

RESTRUCTURING COSTS AND OTHER E

RESTRUCTURING COSTS AND OTHER EXPENSE	9 Months Ended
	Sep. 30, 2017
Restructuring and Related Activities [Abstract]
RESTRUCTURING COSTS AND OTHER EXPENSE	RESTRUCTURING COSTS AND OTHER EXPENSE Restructuring Beginning in the first quarter of 2016, the Company commenced its restructuring initiatives (the "2016 Restructuring Plan") that are intended to simplify the Company's organizational structure. The following table summarizes the activity for the 2016 Restructuring Plan during 2017: Severance and Other Employee Related Costs Facility Realignment and Other Costs Total Accrual balance at December 31, 2016 $ 102,119 $ 8,397 $ 110,516 Restructuring charges 140,071 1,007 141,078 Payments and other (92,905 ) (3,833 ) (96,738 ) Accrual balance at September 30, 2017 $ 149,285 $ 5,571 $ 154,856 The Company recorded restructuring charges of $44,656 and $141,818 for the three and nine months ended September 30, 2016, respectively, relating to the 2016 Restructuring Plan. Cumulative costs to date relating to the 2016 Restructuring Plan amounted to $302,870 and $64,784 for our Cablevision segment and Cequel segments, respectively. Transaction Costs For the three and nine months ended September 30, 2017, the Company incurred transaction costs of $1,367 and $1,687 related to the acquisition of a business during the first quarter of 2017 and other transactions. For the three and nine months ended September 30, 2016, the Company incurred transaction costs of $3,177 and $13,285 , respectively, related to the acquisitions of Cablevision and Suddenlink.

INTANGIBLE ASSETS

INTANGIBLE ASSETS	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS	INTANGIBLE ASSETS The following table summarizes information relating to the Company's acquired intangible assets as of September 30, 2017 : Amortizable Intangible Assets Gross Carrying Amount Accumulated Amortization Net Carrying Amount Estimated Useful Lives Customer relationships $ 5,970,884 (1,207,217 ) $ 4,763,667 8 to 18 years Trade names (a) 1,067,083 (432,402 ) 634,681 2 to 4 years Other amortizable intangibles 37,052 (8,805 ) 28,247 1 to 15 years $ 7,075,019 $ (1,648,424 ) $ 5,426,595 (a) On May 23, 2017, Altice N.V. announced the adoption of a global brand which will replace the Company's brands in the future, reducing the remaining useful lives of these trade name intangibles. The Company has estimated the remaining useful lives to be 3 years from the date of the adoption, which reflects one year as an in-use asset and two years as a defensive asset. Amortization expense is calculated on an accelerated basis based on the Company's estimate of the intangible asset during the in-use period. The remaining estimated value of the defensive asset once it is no longer in use will be amortized over the defensive period. Estimated amortization expense related to the Optimum and Lightpath trade names are approximately $545,805 for 2017 (of which $334,312 has been expensed through September 30, 2017), $355,006 for 2018, $46,627 for 2019 and $18,140 through May 2020. Amortization expense for the three and nine months ended September 30, 2017 aggregated $426,419 , and $981,657 , respectively, and for the three and nine months ended September 30, 2016 aggregated $258,670 and $402,994 , respectively. The following table summarizes information relating to the Company's acquired indefinite-lived intangible assets as of September 30, 2017 : Cablevision Cequel Total Cable television franchises $ 8,113,575 $ 4,906,506 $ 13,020,081 Goodwill 5,839,757 2,153,742 7,993,499 Total $ 13,953,332 $ 7,060,248 $ 21,013,580 The carrying amount of goodwill is presented below: Gross goodwill as of January 1, 2017 $ 7,992,700 Goodwill recorded in connection with acquisition in first quarter 2017 (Cablevision Segment) 20,687 Adjustments to purchase accounting relating to Cablevision Acquisition 3,213 Transfer of Cablevision goodwill related to Altice Technical Services US Corp. (See Note 14 for further details) (23,101 ) Net goodwill as of September 30, 2017 $ 7,993,499

DEBT

DEBT	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
DEBT	DEBT CSC Holdings Credit Facilities In connection with the Cablevision Acquisition, in October 2015, Finco, a wholly-owned subsidiary of the Company, which merged with and into CSC Holdings on June 21, 2016, entered into a senior secured credit facility, which currently provides U.S. dollar term loans currently in an aggregate principal amount of $3,000,000 ( $2,992,500 outstanding at September 30, 2017) (the “CVC Term Loan Facility”, and the term loans extended under the CVC Term Loan Facility, the “CVC Term Loans”) and U.S. dollar revolving loan commitments in an aggregate principal amount of $2,300,000 (the “CVC Revolving Credit Facility” and, together with the Term Loan Facility, the “CVC Credit Facilities”), which are governed by a credit facilities agreement entered into by, inter alios , CSC Holdings, certain lenders party thereto and JPMorgan Chase Bank, N.A. as administrative agent and security agent (as amended, restated, supplemented or otherwise modified on June 20, 2016, June 21, 2016, July 21, 2016, September 9, 2016, December 9, 2016 and March 15, 2017, respectively, and as further amended, restated, supplemented or otherwise modified from time to time, the “CVC Credit Facilities Agreement”). The amendment to the CVC Credit Facilities Agreement entered into on March 15, 2017 (“Extension Amendment”) increased the Term Loan by $500,000 to $3,000,000 and the maturity date for this facility was extended to July 17, 2025. The closing of the Extension Amendment occurred in April 2017 and the proceeds were used to refinance the entire $2,493,750 principal amount of existing Term Loans and redeem $500,000 of the 8.625% Senior Notes due September 2017 issued by Cablevision. In connection with the Extension Amendment and the redemption of the senior notes, the Company recorded a loss on extinguishment of debt and write-off of deferred financing costs aggregating $18,976 . During the nine months ended September 30, 2017, CSC Holdings borrowed $1,350,000 under its revolving credit facility ( $500,000 was used to make cash distributions to its stockholders) and made voluntary repayments aggregating $350,256 with cash on hand. In October 2017, CSC Holdings made a voluntary repayment under its revolving credit facility of $50,000 . This amount was reclassified from long term debt to current debt on the consolidated balance sheet as of September 30, 2017. Under the Extension Amendment, the Company is required to make scheduled quarterly payments equal to 0.25% (or $7,500 ) of the principal amount of the Term Loan, with the remaining balance scheduled to be paid on July 17, 2025, beginning with the fiscal quarter ended September 30, 2017. The CVC Credit Facilities permit CSC Holdings to request revolving loans, swing line loans or letters of credit from the revolving lenders, swingline lenders or issuing banks, as applicable, thereunder, from time to time prior to November 30, 2021, unless the commitments under the CVC Revolving Credit Facility have been previously terminated. Loans comprising each eurodollar borrowing or alternate base rate borrowing, as applicable, bear interest at a rate per annum equal to the adjusted LIBO rate or the alternate base rate, as applicable, plus the applicable margin, where the applicable margin is: • in respect of the CVC Term Loans, (i) with respect to any alternate base rate loan, 1.25% per annum and (ii) with respect to any eurodollar loan, 2.25% per annum, and • in respect of the CVC Revolving Credit Facility loans (i) with respect to any alternate base rate loan, 2.25% per annum and (ii) with respect to any eurodollar loan, 3.25% per annum. The CVC Credit Facilities Agreement requires the prepayment of outstanding CVC Term Loans, subject to certain exceptions and deductions, with (i) 100% of the net cash proceeds of certain asset sales, subject to reinvestment rights and certain other exceptions; and (ii) commencing with the fiscal year ending December 31, 2017, a pari ratable share (based on the outstanding principal amount of the Term Loans divided by the sum of the outstanding principal amount of all pari passu indebtedness and the Term Loans) of 50% of annual excess cash flow, which will be reduced to 0% if the consolidated net senior secured leverage ratio of CSC Holdings is less than or equal to 4.5 to 1. The obligations under the CVC Credit Facilities are guaranteed by each restricted subsidiary of CSC Holdings (other than CSC TKR, LLC and its subsidiaries and certain excluded subsidiaries) (the “Initial Guarantors”) and, subject to certain limitations, will be guaranteed by each future material wholly-owned restricted subsidiary of CSC Holdings. The obligations under the CVC Credit Facilities (including any guarantees thereof) are secured on a first priority basis, subject to any liens permitted by the Credit Facilities, by capital stock held by CSC Holdings or any guarantor in certain subsidiaries of CSC Holdings, subject to certain exclusions and limitations. The CVC Credit Facilities Agreement includes certain negative covenants which, among other things and subject to certain significant exceptions and qualifications, limit CSC Holdings' ability and the ability of its restricted subsidiaries to: (i) incur or guarantee additional indebtedness, (ii) make investments, (iii) create liens, (iv) sell assets and subsidiary stock, (v) pay dividends or make other distributions or repurchase or redeem our capital stock or subordinated debt, (vi) engage in certain transactions with affiliates, (vii) enter into agreements that restrict the payment of dividends by subsidiaries or the repayment of intercompany loans and advances; and (viii) engage in mergers or consolidations. In addition, the CVC Revolving Credit Facility includes a financial maintenance covenant solely for the benefit of the lenders under the CVC Revolving Credit Facility consisting of a maximum consolidated net senior secured leverage ratio of CSC Holdings and its restricted subsidiaries of 5.0 to 1.0. The financial covenant will be tested on the last day of any fiscal quarter, but only if on such day there are outstanding borrowings under the CVC Revolving Credit Facility (including swingline loans but excluding any cash collateralized letters of credit and undrawn letters of credit not to exceed $15,000 ). The CVC Credit Facilities Agreement also contains certain customary representations and warranties, affirmative covenants and events of default (including, among others, an event of default upon a change of control). If an event of default occurs, the lenders under the CVC Credit Facilities will be entitled to take various actions, including the acceleration of amounts due under the CVC Credit Facilities and all actions permitted to be taken by a secured creditor. CSC Holdings was in compliance with all of its financial covenants under the CVC Credit Facilities as of September 30, 2017 . Cequel Credit Facilities On June 12, 2015, Altice US Finance I Corporation, an indirect wholly-owned subsidiary of Cequel, entered into a senior secured credit facility which currently provides term loans in an aggregate principal amount of $1,265,000 ( $1,261,838 outstanding at September 30, 2017) (the “Cequel Term Loan Facility” and the term loans extended under the Cequel Term Loan Facility, the “Cequel Term Loans”) and revolving loan commitments in an aggregate principal amount of $350,000 (the “Cequel Revolving Credit Facility” and, together with the Cequel Term Loan Facility, the “Cequel Credit Facilities”) which are governed by a credit facilities agreement entered into by, inter alios, Altice US Finance I Corporation, certain lenders party thereto and JPMorgan Chase Bank, N.A. (as amended, restated, supplemented or otherwise modified on October 25, 2016, December 9, 2016 and March 15, 2017, and as further amended, restated, supplemented or modified from time to time, the “Cequel Credit Facilities Agreement”). The amendment to the Cequel Credit Facilities Agreement entered into on March 15, 2017 (“Cequel Extension Amendment”) increased the Term Loan by $450,000 to $1,265,000 and the maturity date for this facility was extended to July 28, 2025. The closing of the Extension Amendment occurred in April 2017 and the proceeds were used to refinance the entire $812,963 principal amount of loans under the Term Loan and redeem $450,000 of the 6.375% Senior Notes due September 15, 2020. In connection with the Cequel Extension Amendment and the redemption of the senior notes, the Company recorded a loss on extinguishment of debt and write-off of deferred financings costs aggregating $28,684 . Under the Cequel Extension Amendment, the Company is required to make scheduled quarterly payments equal to 0.25% (or $3,163 ) of the principal amount of the Cequel Term Loan, with the remaining balance scheduled to be paid on July 28, 2025, beginning with the fiscal quarter ended September 30, 2017. Loans comprising each eurodollar borrowing or alternate base rate borrowing, as applicable, bear interest at a rate per annum equal to the adjusted LIBO rate or the alternate base rate, as applicable, plus the applicable margin, where the applicable margin is: • in respect of the Cequel Term Loans, (i) with respect to any alternate base rate loan, 1.25% per annum and (ii) with respect to any eurodollar loan, 2.25% per annum, and • in respect of Cequel Revolving Credit Facility loans (i) with respect to any alternate base rate loan, 2.25% per annum and (ii) with respect to any eurodollar loan, 3.25% per annum. The Cequel Credit Facilities Agreement requires the prepayment of outstanding Term Loans, subject to certain exceptions and deductions, with (i) 100% of the net cash proceeds of certain asset sales, subject to reinvestment rights and certain other exceptions; and (ii) a pari ratable share (based on the outstanding principal amount of the Cequel Term Loans divided by the sum of the outstanding principal amount of all pari passu indebtedness and the Cequel Term Loans) of 50% of annual excess cash flow, which will be reduced to 0% if the consolidated net senior secured leverage ratio is less than or equal to 4.5 :1. The debt under the Cequel Credit Facility is secured by a first priority security interest in the capital stock of Suddenlink and substantially all of the present and future assets of Suddenlink and its restricted subsidiaries, and is guaranteed by Cequel Communications Holdings II, LLC, a subsidiary of Cequel (the "Parent Guarantor"), as well as all of Suddenlink’s existing and future direct and indirect subsidiaries, subject to certain exceptions set forth in the Cequel Credit Facilities Agreement. The Cequel Credit Facilities Agreement contains customary representations, warranties and affirmative covenants. In addition, the Cequel Credit Facilities Agreement contains restrictive covenants that limit, among other things, the ability of Suddenlink and its subsidiaries to incur indebtedness, create liens, engage in mergers, consolidations and other fundamental changes, make investments or loans, engage in transactions with affiliates, pay dividends, and make acquisitions and dispose of assets. The Cequel Credit Facilities Agreement also contains a maximum senior secured leverage maintenance covenant of 5.0 times EBITDA as defined in the Cequel Credit Facilities Agreement. Additionally, the Cequel Credit Facilities Agreement contains customary events of default, including failure to make payments, breaches of covenants and representations, cross defaults to other indebtedness, unpaid judgments, changes of control and bankruptcy events. The lenders’ commitments to fund amounts under the revolving credit facility are subject to certain customary conditions. As of September 30, 2017 , Cequel was in compliance with all of its financial covenants under the Cequel Credit Facilities Agreement. The following table provides details of the Company's outstanding credit facility debt: Carrying Amount (a) Maturity Date Interest Rate Principal September 30, 2017 December 31, 2016 CSC Holdings Restricted Group: Revolving Credit Facility (b) $20,000 on October 9, 2020, remaining balance on November 30, 2021 4.49% $ 1,175,000 $ 1,149,024 $ 145,013 Term Loan Facility July 17, 2025 3.48% 2,992,500 2,974,768 2,486,874 Cequel: Revolving Credit Facility (c) November 30, 2021 — — — — Term Loan Facility July 28, 2025 3.49% 1,261,838 1,253,110 812,903 $ 5,429,338 5,376,902 3,444,790 Less: Current portion 92,650 33,150 Long-term debt $ 5,284,252 $ 3,411,640 (a) The carrying amount is net of the unamortized deferred financing costs and/or discounts/premiums. (b) At September 30, 2017 , $123,473 of the revolving credit facility was restricted for certain letters of credit issued on behalf of the Company and $1,001,527 of the facility was undrawn and available, subject to covenant limitations. (c) At September 30, 2017 , $16,575 of the revolving credit facility was restricted for certain letters of credit issued on behalf of the Company and $333,425 of the facility was undrawn and available, subject to covenant limitations. Senior Guaranteed Notes, Senior Secured Notes and Senior Notes and Debentures The following table summarizes the Company's senior guaranteed notes, senior secured notes and senior notes and debentures: Interest Rate Principal Amount Carrying Amount (a) Issuer Date Issued Maturity Date September 30, 2017 December 31, 2016 CSC Holdings (b)(f) February 6, 1998 February 15, 2018 7.875 % $ 300,000 $ 303,531 $ 310,334 CSC Holdings (b)(f) July 21, 1998 July 15, 2018 7.625 % 500,000 511,312 521,654 CSC Holdings (c)(f) February 12, 2009 February 15, 2019 8.625 % 526,000 544,422 553,804 CSC Holdings (c)(f) November 15, 2011 November 15, 2021 6.750 % 1,000,000 957,954 951,702 CSC Holdings (c)(f) May 23, 2014 June 1, 2024 5.250 % 750,000 657,903 650,193 CSC Holdings (e) October 9, 2015 January 15, 2023 10.125 % 1,800,000 1,777,085 1,774,750 CSC Holdings (e)(l) October 9, 2015 October 15, 2025 10.875 % 1,684,221 1,660,583 1,970,379 CSC Holdings (e) October 9, 2015 October 15, 2025 6.625 % 1,000,000 986,394 985,469 CSC Holdings (g) September 23, 2016 April 15, 2027 5.500 % 1,310,000 1,304,353 1,304,025 Cablevision (k) September 23, 2009 September 15, 2017 8.625 % — — 926,045 Cablevision (c)(f) April 15, 2010 April 15, 2018 7.750 % 750,000 757,515 767,545 Cablevision (c)(f) April 15, 2010 April 15, 2020 8.000 % 500,000 491,224 488,992 Cablevision (c)(f) September 27, 2012 September 15, 2022 5.875 % 649,024 568,796 559,500 Cequel and Cequel Capital Senior Notes (d)(m) Oct. 25, 2012 Dec. 28, 2012 September 15, 2020 6.375 % 1,050,000 1,025,616 1,457,439 Cequel and Cequel Capital Senior Notes (d) May 16, 2013 Sept. 9, 2014 December 15, 2021 5.125 % 1,250,000 1,132,926 1,115,767 Altice US Finance I Corporation Senior Secured Notes (h) June 12, 2015 July 15, 2023 5.375 % 1,100,000 1,081,815 1,079,869 Cequel and Cequel Capital Senior Secured Notes (i) June 12, 2015 July 15, 2025 7.750 % 620,000 604,001 602,925 Altice US Finance I Corporation Senior Notes (j) April 26, 2016 May 15, 2026 5.500 % 1,500,000 1,487,745 1,486,933 $ 16,289,245 15,853,175 17,507,325 Less: Current portion 1,572,358 926,045 Long-term debt $ 14,280,817 $ 16,581,280 (a) The carrying amount is net of the unamortized deferred financing costs and/or discounts/premiums. (b) The debentures are not redeemable by CSC Holdings prior to maturity. (c) Notes are redeemable at any time at a specified "make-whole" price plus accrued and unpaid interest to the redemption date. (d) The Company may redeem some or more of all the notes at the redemption price set forth in the relevant indenture, plus accrued and unpaid interest. (e) The Company may redeem some or all of the 2023 Notes at any time on or after January 15, 2019, and some or all of the 2025 Notes and 2025 Guaranteed Notes at any time on or after October 15, 2020, at the redemption prices set forth in the relevant indenture, plus accrued and unpaid interest, if any. The Company may also redeem up to 40% of each series of the Cablevision Acquisition Notes using the proceeds of certain equity offerings before October 15, 2018, at a redemption price equal to 110.125% for the 2023 Notes, 110.875% for the 2025 Notes and 106.625% for the 2025 Guaranteed Notes, in each case plus accrued and unpaid interest. In addition, at any time prior to January 15, 2019, CSC Holdings may redeem some or all of the 2023 Notes, and at any time prior to October 15, 2020, the Company may redeem some or all of the 2025 Notes and the 2025 Guaranteed Notes, at a price equal to 100% of the principal amount thereof, plus a “make whole” premium specified in the relevant indenture plus accrued and unpaid interest. (f) The carrying value of the notes was adjusted to reflect their fair value on the Cablevision Acquisition Date (aggregate reduction of $52,788 ). (g) The 2027 Guaranteed Notes are redeemable at any time on or after April 15, 2022 at the redemption prices set forth in the indenture, plus accrued and unpaid interest, if any. In addition, up to 40% may be redeemed for each series of the 2027 Guaranteed Notes using the proceeds of certain equity offerings before October 15, 2019, at a redemption price equal to 105.500% , plus accrued and unpaid interest. (h) Some or all of these notes may be redeemed at any time on or after July 15, 2018, plus accrued and unpaid interest, if any. Up to 40% of the notes may be redeemed using the proceeds of certain equity offerings before July 15, 2018, at a redemption price equal to 105.375% . (i) Some or all of these notes may be redeemed at any time on or after July 15, 2020, plus accrued and unpaid interest, if any. Up to 40% of the notes may be redeemed using the proceeds of certain equity offerings before July 15, 2018, at a redemption price equal to 107.750% . (j) Some or all of these notes may be redeemed at any time on or after May 15, 2021, plus accrued and unpaid interest, if any. Up to 40% of the notes may be redeemed using the proceeds of certain equity offerings before May 15, 2019, at a redemption price equal to 105.500% . (k) In April 2017, the Company redeemed $500,000 of the senior notes from proceeds from the CVC Term Loan facility. In September 2017, these senior notes matured and the Company repaid the remaining principal balance of $400,000 . (l) In July 2017, the Company used approximately $350,120 of the proceeds from the IPO to fund the redemption of $315,779 principal amount of CSC Holdings senior notes due October 2025 and the related call premium of approximately $34,341 which was recorded as a loss on extinguishment of debt. The Company also recorded a write-off of deferred financings costs in connection with this redemption aggregating $4,516 . (m) In April 2017, the Company redeemed $450,000 of the senior notes from proceeds from the Cequel Term Loan facility. The indentures under which the senior notes and debentures were issued contain various covenants. The Company was in compliance with all of its financial covenants under these indentures as of September 30, 2017 . Notes Payable to Affiliates and Related Parties On June 21, 2016, in connection with the Cablevision Acquisition, the Company issued notes payable to affiliates and related parties aggregating $1,750,000 , of which $875,000 bore interest at 10.75% and matured on December 20, 2023 and $875,000 bore interest at 11% and matured on December 20, 2024. As discussed in Note 1, in connection with the Company's IPO, the Company converted the notes payable to affiliates and related parties (together with accrued and unpaid interest of $529 and applicable premium of $513,723 ) into shares of the Company’s common stock at the IPO price. The premium was recorded as a loss on extinguishment of debt on the Company's statement of operations for the nine months ended September 30, 2017. In connection with the conversion of the notes, the Company recorded a credit to paid in capital of $2,264,252 . For the nine months ended September 30, 2017, the Company recognized $90,405 of interest expense related to these notes prior to their conversion. Summary of Debt Maturities The future maturities of debt payable by the Company under its various debt obligations outstanding as of September 30, 2017 , including notes payable, collateralized indebtedness (see Note 10), and capital leases, are as follows: Years Ending December 31, Cablevision Cequel Total 2017 $ 29,925 $ 5,256 $ 35,181 2018 1,598,699 14,421 1,613,120 2019 561,995 12,713 574,708 2020 530,007 1,062,723 1,592,730 2021 3,664,638 1,263,578 4,928,216 Thereafter 10,058,245 4,428,075 14,486,320

DERIVATIVE CONTRACTS AND COLLAT

DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS	DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS Prepaid Forward Contracts The Company has entered into various transactions to limit the exposure against equity price risk on its shares of Comcast Corporation ("Comcast") common stock. The Company has monetized all of its stock holdings in Comcast through the execution of prepaid forward contracts, collateralized by an equivalent amount of the respective underlying stock. At maturity, the contracts provide for the option to deliver cash or shares of Comcast stock with a value determined by reference to the applicable stock price at maturity. These contracts, at maturity, are expected to offset declines in the fair value of these securities below the hedge price per share while allowing the Company to retain upside appreciation from the hedge price per share to the relevant cap price. The Company received cash proceeds upon execution of the prepaid forward contracts discussed above which has been reflected as collateralized indebtedness in the accompanying consolidated balance sheets. In addition, the Company separately accounts for the equity derivative component of the prepaid forward contracts. These equity derivatives have not been designated as hedges for accounting purposes. Therefore, the net fair values of the equity derivatives have been reflected in the accompanying consolidated balance sheets as an asset or liability and the net increases or decreases in the fair value of the equity derivative component of the prepaid forward contracts are included in gain (loss) on derivative contracts in the accompanying consolidated statements of operations. All of the Company's monetization transactions are obligations of its wholly-owned subsidiaries that are not part of the Restricted Group; however, CSC Holdings has provided guarantees of the subsidiaries' ongoing contract payment expense obligations and potential payments that could be due as a result of an early termination event (as defined in the agreements). If any one of these contracts were terminated prior to its scheduled maturity date, the Company would be obligated to repay the fair value of the collateralized indebtedness less the sum of the fair values of the underlying stock and equity collar, calculated at the termination date. As of September 30, 2017 , the Company did not have an early termination shortfall relating to any of these contracts. The Company monitors the financial institutions that are counterparties to its equity derivative contracts. All of the counterparties to such transactions carry investment grade credit ratings as of September 30, 2017 . Put/Call Options In the third quarter of 2017, the Company entered into a put-call contract that expires in the third quarter of 2018 whereby the Company sold a put option and purchased a call option with the same strike price. In connection with this transaction, the Company provided cash collateral of approximately $45,000 at September 30, 2017, which reflects the aggregate difference between the strike price and the closing price of the underlying shares and is reflected as restricted cash in our consolidated balance sheet. The fair value of the put-call contract of $48,326 as of September 30, 2017 is reflected in liabilities under derivative contracts on the Company’s balance sheet. For the three months ended September 30, 2017, $72,365 was recorded in the statement of operations as a loss on derivative contracts which reflected a change in the fair value of the put-call contract of $48,326 a nd a realized loss on the settlement of certain put-call options of $24,039 . In October 2017, the Company settled the remaining put-call options and recognized an incremental loss of approximately $25,000 . Interest Rate Swap Contracts In June 2016, the Company entered into two fixed to floating interest rate swap contracts. One fixed to floating interest rate swap is converting $750,000 from a fixed rate of 1.6655% to six-month LIBO rate and a second tranche of $750,000 from a fixed rate of 1.68% to six-month LIBO rate. The objective of these swaps is to cover the exposure of the 2026 Senior Secured Notes issued by Cequel to changes in the market interest rate. These swap contracts were not designated as hedges for accounting purposes. Accordingly, the changes in the fair value of these interest rate swap contracts are recorded through the statements of operations. The Company does not hold or issue derivative instruments for trading or speculative purposes. The following represents the location of the assets and liabilities associated with the Company's derivative instruments within the consolidated balance sheets: Asset Derivatives Liability Derivatives Derivatives Not Designated as Hedging Instruments Balance Sheet Location Fair Value at September 30, 2017 Fair Value at December 31, 2016 Fair Value at September 30, 2017 Fair Value at December 31, 2016 Prepaid forward contracts Derivative contracts, current $ 54,578 $ 352 $ (54,578 ) $ (13,158 ) Prepaid forward contracts Derivative contracts, long-term — 10,604 (52,488 ) — Put/Call options Liabilities under derivative contracts, current — — (48,326 ) — Interest rate swap contracts Liabilities under derivative contracts, long-term — — (69,271 ) (78,823 ) $ 54,578 $ 10,956 $ (224,663 ) $ (91,981 ) Gain (loss) related to the Company's derivative contracts related to the Comcast common stock for the three and nine months ended September 30, 2017 of $55,602 and $(81,905) , respectively, are reflected in gain (loss) on derivative contracts, net in the Company's consolidated statement of operations. For the three and nine months ended September 30, 2017 , the Company recorded a gain (loss) on investments of $(18,900) and $169,888 , respectively, representing the net increase (decrease) in the fair values of the investment securities pledged as collateral. For the three and nine months ended September 30, 2017 , the Company recorded a gain on interest rate swap contracts of $1,051 and $12,539 , respectively. Settlements of Collateralized Indebtedness The following table summarizes the settlement of the Company's collateralized indebtedness relating to Comcast shares that were settled by delivering cash equal to the collateralized loan value, net of the value of the related equity derivative contracts during the nine months ended September 30, 2017 : Number of shares (a) 21,477,618 Collateralized indebtedness settled $ (617,151 ) Derivatives contracts settled (37,838 ) (654,989 ) Proceeds from new monetization contracts 662,724 Net cash proceeds $ 7,735 ______________________ (a) Share amounts are adjusted for the 2 for 1 stock split in February 2017. The cash to settle the collateralized indebtedness was obtained from the proceeds of new monetization contracts covering an equivalent number of Comcast shares. The terms of the new contracts allow the Company to retain upside participation in Comcast shares up to each respective contract's upside appreciation limit with downside exposure limited to the respective hedge price. In April 2017, the Company entered into new monetization contracts related to 32,153,118 shares of Comcast common stock held by Cablevision, which synthetically reversed the existing contracts related to these shares (the "Synthetic Monetization Closeout"). As the existing collateralized debt matures, the Company will settle the contracts with proceeds received from the new monetization contracts. The new monetization contracts mature on April 28, 2021. The new monetization contracts provide the Company with downside protection below the hedge price of $35.47 and upside benefit of stock price appreciation up to $44.72 per share. In connection with the execution of these contracts, the Company recorded (i) the fair value of the equity derivative contracts of $64,793 (in a net asset position), (ii) notes payable of $111,657 , representing the fair value of the existing equity derivative contracts, in a liability position, and (iii) a discount on notes payable of $46,864 .

FAIR VALUE MEASUREMENT

FAIR VALUE MEASUREMENT	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENT	FAIR VALUE MEASUREMENT The fair value hierarchy is based on inputs to valuation techniques that are used to measure fair value that are either observable or unobservable. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity's pricing based upon their own market assumptions. The fair value hierarchy consists of the following three levels: • Level I - Quoted prices for identical instruments in active markets. • Level II - Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable. • Level III - Instruments whose significant value drivers are unobservable. The following table presents for each of these hierarchy levels, the Company's financial assets and financial liabilities that are measured at fair value on a recurring basis: Fair Value Hierarchy September 30, 2017 December 31, 2016 Assets: Money market funds (of which $14,700 is classified as restricted cash as of December 31, 2016) Level I $ 65,801 $ 100,139 Investment securities pledged as collateral Level I 1,652,917 1,483,030 Prepaid forward contracts Level II 54,578 10,956 Liabilities: Prepaid forward contracts Level II 107,066 13,158 Put/Call Options Level II 48,326 — Interest rate swap contracts Level II 69,271 78,823 Contingent consideration related to 2017 acquisition Level III 30,000 — The Company's cash equivalents, investment securities and investment securities pledged as collateral are classified within Level I of the fair value hierarchy because they are valued using quoted market prices. The Company's derivative contracts and liabilities under derivative contracts on the Company's balance sheets are valued using market-based inputs to valuation models. These valuation models require a variety of inputs, including contractual terms, market prices, yield curves, and measures of volatility. When appropriate, valuations are adjusted for various factors such as liquidity, bid/offer spreads and credit risk considerations. Such adjustments are generally based on available market evidence. Since model inputs can generally be verified and do not involve significant management judgment, the Company has concluded that these instruments should be classified within Level II of the fair value hierarchy. The fair value of the contingent consideration related to the acquisition in the first quarter of 2017 was estimated based on a probability assessment of attaining the targets. The estimated amount recorded as of September 30, 2017 is the full contractual amount. Fair Value of Financial Instruments The following methods and assumptions were used to estimate fair value of each class of financial instruments for which it is practicable to estimate: Credit Facility Debt, Collateralized Indebtedness, Senior Notes and Debentures, Senior Secured Notes, Senior Guaranteed Notes, Notes Payable to Affiliates and Related Parties and Notes Payable The fair values of each of the Company's debt instruments are based on quoted market prices for the same or similar issues or on the current rates offered to the Company for instruments of the same remaining maturities. The fair value of notes payable is based primarily on the present value of the remaining payments discounted at the borrowing cost. The carrying values, estimated fair values, and classification under the fair value hierarchy of the Company's financial instruments, excluding those that are carried at fair value in the accompanying consolidated balance sheets, are summarized as follows: September 30, 2017 December 31, 2016 Fair Value Hierarchy Carrying Amount (a) Estimated Fair Value Carrying Amount (a) Estimated Fair Value Altice USA debt instruments: Notes payable to affiliates and related parties Level II $ — $ — $ 1,750,000 $ 1,837,876 CSC Holdings debt instruments: Credit facility debt Level II 4,123,792 4,167,500 2,631,887 2,675,256 Collateralized indebtedness Level II 1,314,788 1,286,557 1,286,069 1,280,048 Senior guaranteed notes Level II 2,290,748 2,460,675 2,289,494 2,416,375 Senior notes and debentures Level II 6,412,789 7,421,261 6,732,816 7,731,150 Notes payable Level II 76,442 72,802 13,726 13,260 Cablevision senior notes: Level II 1,817,536 1,998,340 2,742,082 2,920,056 Cequel debt instruments: Cequel credit facility Level II 1,253,110 1,261,838 812,903 815,000 Senior secured notes Level II 2,569,559 2,745,750 2,566,802 2,689,750 Senior notes Level II 2,762,543 3,036,850 3,176,131 3,517,275 Notes payable Level II 3,083 3,083 — — $ 22,624,390 $ 24,454,656 $ 24,001,910 $ 25,896,046 (a) Amounts are net of unamortized deferred financing costs and discounts. The fair value estimates related to the Company's debt instruments presented above are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates are subjective in nature and involve uncertainties and matters of significant judgments and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates.

INCOME TAXES

INCOME TAXES	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES In general, the Company is required to use an estimated annual effective tax rate to measure the income tax expense or benefit recognized in an interim period. The estimated annual effective tax rate is revised on a quarterly basis and therefore may be different from the rate used in a prior interim period. In addition, certain items included in income tax expense as well as the tax impact of certain items included in pretax income from continuing operations must be treated as discrete items. The income tax expense or benefit associated with these discrete items is fully recognized in the interim period in which the items occur. The Company recorded income tax benefit of $134,688 and $429,664 for the three and nine months ended September 30, 2017 , respectively, reflecting an effective tax rate of 43% and 37% , respectively. Nondeductible share-based compensation expense for the three and nine months ended September 30, 2017 reduced income tax benefit by $6,002 and $16,373 , respectively. The Company recorded income tax benefit of $118,230 and $101,332 for the three and nine months ended September 30, 2016 , respectively. On June 9, 2016 the common stock of Cequel Corporation was contributed to the Company. On June 21, 2016, the Company completed its acquisition of Cablevision. Accordingly, Cequel and Cablevision joined the federal consolidated and certain state combined income tax returns of the Company. As a result, the applicate tax rate used to measure deferred tax assets and liabilities increased, resulting in a non-cash deferred income tax charge of $153,660 in the second quarter of 2016. In addition, there was no state income tax benefit on the pre-merger accrued interest at Finco, resulting in additional deferred tax expense of $2,431 and $18,542 for the three and nine months ended September 30, 2016, respectively. On January 1, 2017, the Company adopted ASU 2016-09 using the prospective transition method with respect to the presentation of excess tax benefits in the statement of cash flows. In connection with the adoption, a deferred tax asset of $308,231 for previously unrealized excess tax benefits related to share-based payment awards was recognized with the offset recorded to accumulated deficit. As of September 30, 2017 , the Company's federal net operating losses (“NOLs”) were approximately $2,674,000 . The utilization of certain pre-merger NOLs of Cablevision and Cequel are limited pursuant to Internal Revenue Code Section 382. The Company does not expect such limitations to impact the ability to utilize the NOLs prior to their expiration.

SHARE BASED COMPENSATION

SHARE BASED COMPENSATION	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
SHARE BASED COMPENSATION	SHARE BASED COMPENSATION Certain employees of the Company and its affiliates received awards of units in a carry unit plan of Neptune Management LP, an entity which has an ownership interest in the Company. The awards generally vest as follows: 50% on the second anniversary of June 21, 2016 for Cablevision employees or December 21, 2015 for Cequel employees ("Base Date"), 25% on the third anniversary of the Base Date, and 25% on the fourth anniversary of the Base Date. Neptune Holding US GP LLC, the general partner of Neptune Management LP, has the right to repurchase (or to assign to an affiliate, including the Company, the right to repurchase) vested awards held by employees for sixty days following their termination. For performance-based awards under the plan, vesting occurs upon achievement or satisfaction of a specified performance condition. The Company considered the probability of achieving the established performance targets in determining the share-based compensation with respect to these awards at the end of each reporting period. The carry unit plan has 259,442,785 units authorized for issuance, of which 215,295,834 have been issued to employees of the Company and 11,300,000 have been issued to employees of Altice N.V. and affiliated companies as of September 30, 2017 . Beginning on the fourth anniversary of the Base Date, the holders of carry units have an annual opportunity (a sixty day period determined by the administrator of the plan) to sell their units back to Neptune Holding US GP LLC (or affiliate, including the Company, designated by Neptune Holding US GP LLC). Accordingly, the carry units are presented as temporary equity on the consolidated balance sheets at fair value. Adjustments to fair value at each reporting period are recorded in paid-in capital. The right of Neptune Holding US GP LLC to assign to an affiliate, including the Company, the right to repurchase an employee’s vested units during the sixty-day period following termination, or to satisfy its obligation to repurchase an employee’s vested units during annual 60 day periods following the fourth anniversary of the Base Date, may be exercised by Neptune Holding US GP LLC in its discretion at the time a repurchase right or obligation arises. The carry unit plan requires the purchase price payable to the employee or former employee, as the case may be, to be paid in cash, a promissory note (with a term of not more than 3 years and bearing interest at the long-term applicable federal rate under Section 1274(d) of the Internal Revenue Code) or combination thereof, in each case as determined by Neptune Holding US GP LLC in its discretion at the time of the repurchase. Neptune Holding US GP LLC expects that vested units will be redeemed for shares of the Company's Class A common stock upon vesting. The Company measures the cost of employee services received in exchange for carry units based on the fair value of the award at grant date. For carry unit awards granted in 2016, an option pricing model was used which requires subjective assumptions for which changes in these assumptions could materially affect the fair value of the carry units outstanding. The time to liquidity event assumption was based on management’s judgment. The equity volatility assumption was estimated using the historical weekly volatility of publicly traded comparable companies. The risk-free rate assumed was based on the U.S. Constant Maturity Treasury Rates for a period matching the expected time to liquidity event. The discount for lack of marketability was based on Finnerty's (2012) average-strike put option model. For carry unit awards granted in the first and second quarter of 2017, the Company estimated the grant date fair value based on the value established in the Company's IPO. The following table summarizes activity relating to carry units: Number of Time Vesting Awards Number of Performance Based Vesting Awards Weighted Average Grant Date Fair Value Balance, December 31, 2016 192,800,000 10,000,000 $ 0.37 Granted 28,025,000 — 3.14 Forfeited (4,229,166 ) — 0.37 Balance, September 30, 2017 216,595,834 10,000,000 0.71 Awards vested at September 30, 2017 — — The weighted average fair value per unit was $1.76 and $3.49 as of December 31, 2016 and September 30, 2017, respectively. For the three and nine months ended September 30, 2017 , the Company recognized an expense of $15,005 and $40,932 related to the push down of share-based compensation related to the carry unit plan of which approximately $14,448 and $39,150 related to units granted to employees of the Company and $557 and $1,782 related to employees of Altice N.V. and affiliated companies allocated to the Company.

AFFILIATE AND RELATED PARTY TRA

AFFILIATE AND RELATED PARTY TRANSACTIONS	9 Months Ended
	Sep. 30, 2017
Related Party Transactions [Abstract]
AFFILIATE AND RELATED PARTY TRANSACTIONS	AFFILIATE AND RELATED PARTY TRANSACTIONS Equity Method Investments In July 2016, the Company completed the sale of a 75% interest in Newsday LLC ("Newsday") to an employee of the Company. The Company retained the remaining 25% ownership interest. Effective July 7, 2016, the operating results of Newsday are no longer consolidated with those of the Company and the Company's 25% interest in the operating results of Newsday is recorded on the equity method. At September 30, 2017 , the Company's 25% investment in Newsday and its 25% interest in i24NEWS, Altice N.V.'s 24/7 international news and current affairs channel aggregated $1,694 and is included in investments in affiliates on our consolidated balance sheet. The operating results of Newsday and i24NEWS are recorded on the equity basis. For the three and nine months ended September 30, 2017 , the Company recorded equity in net loss of Newsday of $1,034 and $2,571 , respectively, and equity in net loss of I24NEWS of $541 and $3,126 , respectively. Affiliate and Related Party Transactions As the transactions discussed below were conducted between subsidiaries of Altice N.V. under common control and equity method investees, amounts charged for certain services may not have represented amounts that might have been received or incurred if the transactions were based upon arm's length negotiations. Altice Technical Services US Corp. ("ATS") ATS is a wholly-owned subsidiary of Altice Technical Services B.V., a 70% owned subsidiary of Altice N.V. ATS was formed to provide network construction and maintenance services and commercial and residential installations, disconnections, and maintenance. In the second quarter of 2017, the Company entered into an Independent Contractor Agreement with ATS that governs the terms of the services described above. The Company believes the services it receives from ATS will be of higher quality and at a lower cost than the Company could achieve without ATS, including for the construction of our new FTTH network. The Company also entered into a transition services agreement (“TSA”) for the use of the Company’s resources to provide various overhead functions to ATS, including accounting, legal and human resources and for the use of certain facilities, vehicles and technician tools during a transitional period that generally ends on December 31, 2017, although the term can be extended on a service-by-service basis. The TSA requires ATS to reimburse the Company for its cost to provide such services. During the second quarter of 2017, a substantial portion of the Company's technical workforce at the Cablevision segment either accepted employment with ATS or became employees of ATS and ATS commenced operations and began to perform services for the Company. It is anticipated that a substantial portion of the Cequel segment technical workforce will become employees of ATS later in 2017. From the formation of ATS and up until an equity contribution was made by its parent in June 2017, ATS met the definition of a variable interest entity in accordance with ASC 810-10-15-14. The Company evaluated whether its arrangement under the terms of the Independent Contractor Agreement is a variable interest, whether the Company is the primary beneficiary and whether the Company should consolidate ATS. The Company concluded that it is not the primary beneficiary of ATS because ATS is controlled by its parent, which in turn is controlled by Altice N.V. who has the power to direct the most significant activities of ATS. As of September 30, 2017 , the Company had a prepayment balance of $11,296 primarily to ATS which is reflected in prepaid expenses and other current assets and $2,570 which is reflected in other long-term assets on the Company's balance sheet. The Company reduced goodwill to reflect the preliminary estimate of the historical value of the goodwill associated with the transfer to ATS described above of $23,101 , that has been recorded as a reduction to stockholders' equity. The following table summarizes the revenue and charges related to services provided to or received from subsidiaries of Altice N.V. and Newsday: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Revenue $ 986 $ 720 $ 1,380 $ 720 Operating expenses: Programming and other direct costs $ (1,196 ) $ (642 ) $ (3,026 ) $ (642 ) Other operating expenses, net (28,332 ) (8,056 ) (73,263 ) (13,056 ) Operating expenses, net (29,528 ) (8,698 ) (76,289 ) (13,698 ) Interest expense (a) — (48,617 ) (90,405 ) (53,922 ) Loss on extinguishment of debt and write-off of deferred financing costs — — (513,723 ) — Net charges $ (28,542 ) $ (56,595 ) $ (679,037 ) $ (66,900 ) Capital Expenditures $ 72,185 $ — $ 98,234 $ — (a) See Note 9 for a discussion of interest expense related to notes payable to affiliates and related parties of $90,405 for the nine months ended September 30, 2017. Revenue The Company recognized revenue in connection with the sale of pay television, broadband and telephony services to ATS and the sale of advertising to Newsday. Programming and other direct costs Programming and other direct costs include costs incurred by the Company for the transport and termination of voice and data services provided by a subsidiary of Altice N.V. Other operating expenses Other operating expenses includes charges of $20,030 and $48,997 from ATS for the three and nine months ended September 30, 2017, respectively, pursuant to the Independent Contractor Agreement, net of charges to ATS pursuant to the TSA, discussed above. A subsidiary of Altice N.V. provides certain executive services, as well as consulting, advisory and other services, including, prior to the IPO, CEO, CFO and COO services, to the Company. Compensation under the terms of the agreement is an annual fee of $30,000 to be paid by the Company. Fees associated with this agreement recorded by the Company amounted to approximately $7,500 and $22,500 , for the three and nine months ended September 30, 2017 , respectively, and $8,056 and $13,056 for the three and nine months ended September 30, 2016, respectively. As of June 20, 2017, the CEO, CFO and COO became employees of the Company and the agreement was assigned to Altice N.V. by a subsidiary of Altice N.V. Other operating expenses also include charges for services provided by other subsidiaries of Altice N.V. aggregating $802 and $1,766 , respectively, net of a credit of $76 and $917 for transition services provided to Newsday for the three and nine months ended September 30, 2017 , respectively. Capital Expenditures Capital expenditures include $68,636 and $85,320 (including advance payments related to the FTTH project of $41,036 ) for installation and construction activities performed by ATS for the three and nine months ended September 30, 2017, respectively, and $3,549 and $12,914 , respectively, for equipment purchases and software development services provided by subsidiaries of Altice NV. Aggregate amounts that were due from and due to related parties are summarized below: September 30, 2017 December 31, 2016 Due from: Altice US Finance S.A. (a) $ 12,951 $ 12,951 Newsday (b) 4,177 6,114 Altice Management Americas (b) 615 3,117 i24NEWS (b) 3,373 — Other Altice N.V. subsidiaries (b) 37 — $ 21,153 $ 22,182 Due to: CVC 3BV (c) — 71,655 Neptune Holdings US LP (c) — 7,962 Altice Management International (d) — 44,121 ATS (b)(e) 22,541 — Newsday (b) 103 275 Other Altice N.V. subsidiaries (f) 6,358 3,350 $ 29,002 $ 127,363 (a) Represents interest on senior notes paid by the Company on behalf of the affiliate. (b) Represents amounts paid by the Company on behalf of the respective related party and for Newsday and ATS, the net amounts due from the related party also include charges for certain transition services provided. (c) Represents distributions payable to stockholders. (d) Amounts payable as of December 31, 2016 primarily represent amounts due for equipment purchases and software development services discussed above. (e) Represents amounts due to ATS for construction, maintenance, and installation services, net of charges to ATS pursuant to the TSA. See discussion above. (f) Represents amounts due to affiliates for services provided to the Company. The table above does not include notes payable to affiliates and related parties of $1,750,000 and the related accrued interest of $102,557 as of December 31, 2016 , respectively, which is reflected in accrued interest in the Company's balance sheet. See discussion in Note 9. In the second quarter of 2017, the Company made cash distributions aggregating $839,700 to stockholders, $500,000 of which were funded with proceeds from borrowings under CSC Holdings' revolving credit facility.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Legal Matters Following expiration of the affiliation agreements for carriage of certain Fox broadcast stations and cable networks on October 16, 2010, News Corporation terminated delivery of the programming feeds to Cablevision, and as a result, those stations and networks were unavailable on Cablevision's cable television systems. On October 30, 2010, Cablevision and Fox reached an agreement on new affiliation agreements for these stations and networks, and carriage was restored. Several purported class action lawsuits alleging breach of contract, unjust enrichment, and consumer fraud and seeking unspecified compensatory damages, punitive damages and attorneys' fees were subsequently filed on behalf of Cablevision's customers seeking recovery for the lack of Fox programming. Those lawsuits were consolidated in an action before the U. S. District Court for the Eastern District of New York, and a consolidated complaint was filed in that court on February 22, 2011. On March 28, 2012, in ruling on Cablevision's motion to dismiss, the Court dismissed all of plaintiffs’ claims, except for breach of contract. On March 30, 2014, the Court granted plaintiffs’ motion for class certification. The parties have entered into a settlement agreement, which is subject to Court approval. As of December 31, 2016, the Company had an estimated liability associated with a potential settlement totaling $5,200 . During the nine months ended September 30, 2017 , the Company recorded an additional liability of $800 . The amount ultimately paid in connection with the proposed settlement could exceed the amount recorded. In October 2015, the New York Attorney General began an investigation into whether the major Internet Service Providers in New York State deliver advertised Internet speeds. The Company is cooperating with this investigation and is currently in discussions with the New York Attorney General about resolving the investigation as to the Company, which resolution may involve operational and or financial components. While the Company is unable to predict the outcome of the investigation or these discussions, at this time it does not expect that the outcome will have a material adverse effect on its operations, financial conditions or cash flows. The Company receives notices from third parties and, in some cases, is named as a defendant in certain lawsuits claiming infringement of various patents relating to various aspects of the Company's businesses. In certain of these cases other industry participants are also defendants. In certain of these cases the Company expects that any potential liability would be the responsibility of the Company's equipment vendors pursuant to applicable contractual indemnification provisions. The Company believes that the claims are without merit and intends to defend the actions vigorously, but is unable to predict the outcome of these matters or reasonably estimate a range of possible loss. In addition to the matters discussed above, the Company is party to various lawsuits, some involving claims for substantial damages. Although the outcome of these other matters cannot be predicted and the impact of the final resolution of these other matters on the Company's results of operations in a particular subsequent reporting period is not known, management does not believe that the resolution of these other lawsuits will have a material adverse effect on the financial position of the Company or the ability of the Company to meet its financial obligations as they become due.

SEGMENT INFORMATION

SEGMENT INFORMATION	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
SEGMENT INFORMATION	SEGMENT INFORMATION The Company classifies its operations into two reportable segments: Cablevision and Cequel. The Company's reportable segments are strategic business units that are managed separately. The Company evaluates segment performance based on several factors, of which the primary financial measure is business segment Adjusted EBITDA, a non-GAAP measure. The Company defines Adjusted EBITDA as net income (loss) excluding income taxes, income (loss) from discontinued operations, non-operating other income or expenses, loss on extinguishment of debt and write-off of deferred financing costs, gain (loss) on interest rate swap contracts, gain (loss) on derivative contracts, gain (loss) on investments, interest expense (including cash interest expense), interest income, depreciation and amortization (including impairments), share-based compensation expense or benefit, restructuring expense or credits and transaction expenses. The Company has presented the components that reconcile Adjusted EBITDA to operating income, an accepted GAAP measure: Three Months Ended September 30, 2017 Three Months Ended September 30, 2016 Cablevision Cequel Total Cablevision (a) Cequel Total Operating income (loss) $ 11,185 $ 123,679 $ 134,864 $ 39,947 $ 102,832 $ 142,779 Share-based compensation 11,555 3,450 15,005 1,091 579 1,670 Restructuring and other expense 35,364 18,084 53,448 45,176 2,640 47,816 Depreciation and amortization (including impairments) 656,102 167,163 823,265 481,497 189,432 670,929 Adjusted EBITDA $ 714,206 $ 312,376 $ 1,026,582 $ 567,711 $ 295,483 $ 863,194 Nine months ended September 30, 2017 Nine months ended September 30, 2016 Cablevision Cequel Total Cablevision (a) Cequel Total Operating income (loss) $ 244,667 $ 395,213 $ 639,880 $ (32,133 ) $ 274,575 $ 242,442 Share-based compensation 28,597 12,335 40,932 1,091 579 1,670 Restructuring and other expense 105,182 37,583 142,765 143,891 11,195 155,086 Depreciation and amortization (including impairments) 1,641,477 497,299 2,138,776 526,057 559,872 1,085,929 Adjusted EBITDA $ 2,019,923 $ 942,430 $ 2,962,353 $ 638,906 $ 846,221 $ 1,485,127 (a) Reflects operating results of Cablevision from the date of acquisition. A reconciliation of reportable segment amounts to the Company's consolidated balances are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Operating income for reportable segments $ 134,864 $ 142,779 $ 639,880 $ 242,442 Items excluded from operating income: Interest expense (379,064 ) (446,242 ) (1,232,730 ) (1,015,866 ) Interest income 961 404 1,373 12,787 Gain (loss) on investments, net (18,900 ) 24,833 169,888 83,467 Gain (loss) on derivative contracts, net (16,763 ) 773 (154,270 ) (26,572 ) Gain (loss) on interest rate swap contracts 1,051 (15,861 ) 12,539 24,380 Loss on extinguishment of debt and write-off of deferred financing costs (38,858 ) — (600,240 ) (19,948 ) Other income (expense), net (65 ) 2,531 832 2,548 Loss before income taxes $ (316,774 ) $ (290,783 ) $ (1,162,728 ) $ (696,762 ) The following tables present the composition of revenue by segment for the three and nine months ended September 30, 2017 and 2016 : Three Months Ended September 30, 2017 Three Months Ended September 30, 2016 Cablevision Cequel Eliminations Total Cablevision (a) Cequel Total Residential: Pay TV $ 782,214 $ 272,178 $ — $ 1,054,392 $ 772,886 $ 279,109 $ 1,051,995 Broadband 404,153 241,941 — 646,094 366,166 212,439 578,605 Telephony 172,904 31,849 — 204,753 178,000 38,186 216,186 Business services and wholesale 230,274 94,486 — 324,760 220,352 89,014 309,366 Advertising 67,563 17,456 (480 ) 84,539 67,815 20,944 88,759 Other 7,211 5,426 — 12,637 9,480 5,830 15,310 Total Revenue $ 1,664,319 $ 663,336 $ (480 ) $ 2,327,175 $ 1,614,699 $ 645,522 $ 2,260,221 Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 Cablevision (a) Cequel Eliminations Total Cablevision (a) Cequel Total Residential: Pay TV $ 2,356,230 $ 829,380 $ — $ 3,185,610 $ 859,932 $ 840,354 $ 1,700,286 Broadband 1,177,731 709,548 — 1,887,279 406,057 613,012 1,019,069 Telephony 524,696 99,381 — 624,077 198,282 116,855 315,137 Business services and wholesale 690,168 278,123 — 968,291 244,685 260,278 504,963 Advertising 203,351 54,384 (480 ) 257,255 75,458 63,476 138,934 Other 21,366 17,314 — 38,680 14,145 18,777 32,922 Total Revenue $ 4,973,542 $ 1,988,130 $ (480 ) $ 6,961,192 $ 1,798,559 $ 1,912,752 $ 3,711,311 (a) Reflects revenue from the Cablevision Acquisition Date. Capital expenditures (cash basis) by reportable segment are presented below: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Cablevision $ 228,594 $ 150,815 $ 550,231 $ 150,965 Cequel 75,042 97,341 213,067 226,761 $ 303,636 $ 248,156 $ 763,298 $ 377,726 All revenues and assets of the Company's reportable segments are attributed to or located in the United States. Total assets by segment are not provided as such amounts are not regularly reviewed by the chief operating decision maker for purposes of decision making regarding resource allocations.

SUMMARY OF SIGNIFICANT ACCOUN26

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Recently Adopted Accounting Pronouncements and Recently Issued But Not Yet Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncement In March 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-09, Compensation—Stock Compensation: Improvements to Employee Share-Based Payment Accounting, which provides simplification of income tax accounting for share-based payment awards. The new guidance became effective for the Company on January 1, 2017. Amendments related to the timing of when excess tax benefits are recognized, minimum statutory withholding requirements, forfeitures, and intrinsic value will be applied using the modified retrospective transition method. Amendments requiring recognition of excess tax benefits and tax deficiencies in the income statement and the practical expedient for estimating expected term were applied prospectively. The Company elected to apply the amendments related to the presentation of excess tax benefits on the statement of cash flows using the prospective transition method. In connection with the adoption on January 1, 2017, a deferred tax asset of approximately $308,231 for previously unrealized excess tax benefits was recognized with the offset recorded to accumulated deficit. Recently Issued But Not Yet Adopted Accounting Pronouncements In May 2017, the FASB issued ASU No. 2017‑09, Compensation- Stock Compensation (Topic 718). ASU No. 2017‑09 provides clarity and guidance on which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. ASU No. 2017‑09 becomes effective for the Company on January 1, 2018 with early adoption permitted and will be applied prospectively. In March 2017, the FASB issued ASU No. 2017‑07 Compensation-Retirement Benefits (Topic 715). ASU No. 2017‑07 requires that an employer disaggregate the service cost component from the other components of net benefit cost. It also provides guidance on how to present the service cost component and the other components of net benefit cost in the income statement and what component of net benefit cost is eligible for capitalization. ASU No. 2017‑07 becomes effective for the Company on January 1, 2018 with early adoption permitted and will be applied retrospectively. The Company has not yet completed the evaluation of the effect that ASU No. 2017‑07 will have on its consolidated financial statements. In January 2017, the FASB issued ASU No. 2017‑04, Intangibles-Goodwill and Other (Topic 350). ASU No. 2017‑04 simplifies the subsequent measurement of goodwill by removing the second step of the two‑step impairment test. The amendment requires an entity to perform its annual, or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. ASU No. 2017‑04 becomes effective for the Company on January 1, 2020 with early adoption permitted and will be applied prospectively. In January 2017, the FASB issued ASU No. 2017‑01, Business Combinations (Topic 805), Clarifying the Definition of a Business, which amends Topic 805 to interpret the definition of a business by adding guidance to assist in evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The new guidance becomes effective for the Company on January 1, 2018 with early adoption permitted and will be applied prospectively. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments which clarifies how entities should classify certain cash receipts and cash payments on the statement of cash flows. ASU No. 2016-15 also clarifies how the predominance principle should be applied when cash receipts and cash payments have aspects of more than one class of cash flows. The new guidance becomes effective for the Company on January 1, 2018 with early adoption permitted and will be applied retrospectively. The Company has not yet completed the evaluation of the effect that ASU No. 2016-15 will have on its consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases , which increases transparency and comparability by recognizing a lessee’s rights and obligations resulting from leases by recording them on the balance sheet as lease assets and lease liabilities. The new guidance becomes effective for the Company on January 1, 2019 with early adoption permitted and will be applied using the modified retrospective method. The Company has not yet completed the evaluation of the effect that ASU No. 2016-02 will have on its consolidated financial statements. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities. ASU No. 2016-01 modifies how entities measure certain equity investments and also modifies the recognition of changes in the fair value of financial liabilities measured under the fair value option. Entities will be required to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair value and recognize any changes in fair value in net income. For financial liabilities measured using the fair value option, entities will be required to record changes in fair value caused by a change in instrument-specific credit risk (own credit risk) separately in other comprehensive income. ASU No. 2016-01 becomes effective for the Company on January 1, 2018. The Company has not yet completed the evaluation of the effect that ASU No. 2016-01 will have on its consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, requiring an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU No. 2014-09 will replace most existing revenue recognition guidance in GAAP when it becomes effective and allows the use of either the retrospective or cumulative effect transition method. In August 2015, the FASB issued ASU No. 2015-14 that approved deferring the effective date by one year so that ASU No. 2014-09 would become effective for the Company on January 1, 2018. The FASB also approved, in July 2015, permitting the early adoption of ASU No. 2014-09, but not before the original effective date for the Company of January 1, 2017. In December 2016, the FASB issued ASU No. 2016-20, Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers, in order to clarify the Codification and to correct any unintended application of the guidance. These items are not expected to have a significant effect on the current accounting standard. The amendments in this update affect the guidance in ASU No. 2014-09, which is not yet effective. ASU No. 2014-09 will be effective January 1, 2018 for the Company, reflecting the one-year deferral. Early adoption of the standard is permitted but not before the original effective date. Companies can transition to the standard either retrospectively or as a cumulative-effect adjustment as of the date of adoption. The Company is in the process of evaluating the impact that the adoption of ASU No. 2014-09 will have on its consolidated financial statements and selecting the method of transition to the new standard. The Company currently expects the adoption to impact the timing of the recognition of residential installation revenue and the recognition of commission expenses.
Gross Versus Net Revenue Recognition	In the normal course of business, the Company is assessed non-income related taxes by governmental authorities, including franchising authorities (generally under multi-year agreements), and collects such taxes from its customers. The Company's policy is that, in instances where the tax is being assessed directly on the Company, amounts paid to the governmental authorities and amounts received from the customers are recorded on a gross basis. That is, amounts paid to the governmental authorities are recorded as programming and other direct costs and amounts received from the customer are recorded as revenue.

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table provides the allocation of the total purchase price of $9,958,323 to the identifiable tangible and intangible assets and liabilities of Cablevision based on their respective fair values. The remaining useful lives represent the period over which acquired tangible and intangible assets with a finite life are being depreciated or amortized. Fair Values Estimated Useful Lives Current assets $ 1,923,071 Accounts receivable 271,305 Property, plant and equipment 4,864,621 2-18 years Goodwill 5,842,172 Indefinite-lived cable television franchises 8,113,575 Indefinite-lived Customer relationships 4,850,000 8 to 18 years Trade names (a) 1,010,000 12 years Amortizable intangible assets 23,296 1-15 years Other non-current assets 748,998 Current liabilities (2,311,201 ) Long-term debt (8,355,386 ) Deferred income taxes. (6,832,773 ) Other non-current liabilities (189,355 ) Total $ 9,958,323 (a) See Note 8 for additional information regarding a change in the remaining estimated useful lives of the Company's trade names.
Business Acquisition, Pro Forma Information	Nine Months Ended September 30, 2016 Revenue $ 6,848,916 Net loss $ (527,851 )

SUPPLEMENTAL CASH FLOW INFORM28

SUPPLEMENTAL CASH FLOW INFORMATION (Tables)	9 Months Ended
	Sep. 30, 2017
Supplemental Cash Flow Elements [Abstract]
Non-Cash Investing and Financing Activities and Other Supplemental Data	The Company's non-cash investing and financing activities and other supplemental data were as follows: Nine Months Ended September 30, 2017 2016 Non-Cash Investing and Financing Activities: Continuing Operations: Conversion of notes payable to affiliates and related parties of $1,750,000 (together with accrued and unpaid interest and applicable premium) to common stock (See Note 9) $ 2,264,252 $ — Property and equipment accrued but unpaid 84,847 83,722 Leasehold improvements paid by landlord 3,998 — Notes payable to vendor 25,879 — Supplemental Data: Cash interest paid 1,481,363 931,345 Income taxes paid, net 26,396 5,342

RESTRUCTURING COSTS AND OTHER29

RESTRUCTURING COSTS AND OTHER EXPENSE (Tables)	9 Months Ended
	Sep. 30, 2017
Restructuring and Related Activities [Abstract]
Restructuring Cost Activity	The following table summarizes the activity for the 2016 Restructuring Plan during 2017: Severance and Other Employee Related Costs Facility Realignment and Other Costs Total Accrual balance at December 31, 2016 $ 102,119 $ 8,397 $ 110,516 Restructuring charges 140,071 1,007 141,078 Payments and other (92,905 ) (3,833 ) (96,738 ) Accrual balance at September 30, 2017 $ 149,285 $ 5,571 $ 154,856

INTANGIBLE ASSETS (Tables)

INTANGIBLE ASSETS (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Acquired Finite-Lived Intangible Assets by Major Class	The following table summarizes information relating to the Company's acquired intangible assets as of September 30, 2017 : Amortizable Intangible Assets Gross Carrying Amount Accumulated Amortization Net Carrying Amount Estimated Useful Lives Customer relationships $ 5,970,884 (1,207,217 ) $ 4,763,667 8 to 18 years Trade names (a) 1,067,083 (432,402 ) 634,681 2 to 4 years Other amortizable intangibles 37,052 (8,805 ) 28,247 1 to 15 years $ 7,075,019 $ (1,648,424 ) $ 5,426,595 (a) On May 23, 2017, Altice N.V. announced the adoption of a global brand which will replace the Company's brands in the future, reducing the remaining useful lives of these trade name intangibles. The Company has estimated the remaining useful lives to be 3 years from the date of the adoption, which reflects one year as an in-use asset and two years as a defensive asset. Amortization expense is calculated on an accelerated basis based on the Company's estimate of the intangible asset during the in-use period. The remaining estimated value of the defensive asset once it is no longer in use will be amortized over the defensive period. Estimated amortization expense related to the Optimum and Lightpath trade names are approximately $545,805 for 2017 (of which $334,312 has been expensed through September 30, 2017), $355,006 for 2018, $46,627 for 2019 and $18,140 through May 2020.
Schedule of Indefinite-Lived Intangible Assets	The following table summarizes information relating to the Company's acquired indefinite-lived intangible assets as of September 30, 2017 : Cablevision Cequel Total Cable television franchises $ 8,113,575 $ 4,906,506 $ 13,020,081 Goodwill 5,839,757 2,153,742 7,993,499 Total $ 13,953,332 $ 7,060,248 $ 21,013,580
Schedule of Goodwill	The carrying amount of goodwill is presented below: Gross goodwill as of January 1, 2017 $ 7,992,700 Goodwill recorded in connection with acquisition in first quarter 2017 (Cablevision Segment) 20,687 Adjustments to purchase accounting relating to Cablevision Acquisition 3,213 Transfer of Cablevision goodwill related to Altice Technical Services US Corp. (See Note 14 for further details) (23,101 ) Net goodwill as of September 30, 2017 $ 7,993,499

DEBT (Tables)

DEBT (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Schedule of Line of Credit Facilities	The following table provides details of the Company's outstanding credit facility debt: Carrying Amount (a) Maturity Date Interest Rate Principal September 30, 2017 December 31, 2016 CSC Holdings Restricted Group: Revolving Credit Facility (b) $20,000 on October 9, 2020, remaining balance on November 30, 2021 4.49% $ 1,175,000 $ 1,149,024 $ 145,013 Term Loan Facility July 17, 2025 3.48% 2,992,500 2,974,768 2,486,874 Cequel: Revolving Credit Facility (c) November 30, 2021 — — — — Term Loan Facility July 28, 2025 3.49% 1,261,838 1,253,110 812,903 $ 5,429,338 5,376,902 3,444,790 Less: Current portion 92,650 33,150 Long-term debt $ 5,284,252 $ 3,411,640 (a) The carrying amount is net of the unamortized deferred financing costs and/or discounts/premiums. (b) At September 30, 2017 , $123,473 of the revolving credit facility was restricted for certain letters of credit issued on behalf of the Company and $1,001,527 of the facility was undrawn and available, subject to covenant limitations. (c) At September 30, 2017 , $16,575 of the revolving credit facility was restricted for certain letters of credit issued on behalf of the Company and $333,425 of the facility was undrawn and available, subject to covenant limitations.
Schedule of Long-term Debt Instruments	The following table summarizes the Company's senior guaranteed notes, senior secured notes and senior notes and debentures: Interest Rate Principal Amount Carrying Amount (a) Issuer Date Issued Maturity Date September 30, 2017 December 31, 2016 CSC Holdings (b)(f) February 6, 1998 February 15, 2018 7.875 % $ 300,000 $ 303,531 $ 310,334 CSC Holdings (b)(f) July 21, 1998 July 15, 2018 7.625 % 500,000 511,312 521,654 CSC Holdings (c)(f) February 12, 2009 February 15, 2019 8.625 % 526,000 544,422 553,804 CSC Holdings (c)(f) November 15, 2011 November 15, 2021 6.750 % 1,000,000 957,954 951,702 CSC Holdings (c)(f) May 23, 2014 June 1, 2024 5.250 % 750,000 657,903 650,193 CSC Holdings (e) October 9, 2015 January 15, 2023 10.125 % 1,800,000 1,777,085 1,774,750 CSC Holdings (e)(l) October 9, 2015 October 15, 2025 10.875 % 1,684,221 1,660,583 1,970,379 CSC Holdings (e) October 9, 2015 October 15, 2025 6.625 % 1,000,000 986,394 985,469 CSC Holdings (g) September 23, 2016 April 15, 2027 5.500 % 1,310,000 1,304,353 1,304,025 Cablevision (k) September 23, 2009 September 15, 2017 8.625 % — — 926,045 Cablevision (c)(f) April 15, 2010 April 15, 2018 7.750 % 750,000 757,515 767,545 Cablevision (c)(f) April 15, 2010 April 15, 2020 8.000 % 500,000 491,224 488,992 Cablevision (c)(f) September 27, 2012 September 15, 2022 5.875 % 649,024 568,796 559,500 Cequel and Cequel Capital Senior Notes (d)(m) Oct. 25, 2012 Dec. 28, 2012 September 15, 2020 6.375 % 1,050,000 1,025,616 1,457,439 Cequel and Cequel Capital Senior Notes (d) May 16, 2013 Sept. 9, 2014 December 15, 2021 5.125 % 1,250,000 1,132,926 1,115,767 Altice US Finance I Corporation Senior Secured Notes (h) June 12, 2015 July 15, 2023 5.375 % 1,100,000 1,081,815 1,079,869 Cequel and Cequel Capital Senior Secured Notes (i) June 12, 2015 July 15, 2025 7.750 % 620,000 604,001 602,925 Altice US Finance I Corporation Senior Notes (j) April 26, 2016 May 15, 2026 5.500 % 1,500,000 1,487,745 1,486,933 $ 16,289,245 15,853,175 17,507,325 Less: Current portion 1,572,358 926,045 Long-term debt $ 14,280,817 $ 16,581,280 (a) The carrying amount is net of the unamortized deferred financing costs and/or discounts/premiums. (b) The debentures are not redeemable by CSC Holdings prior to maturity. (c) Notes are redeemable at any time at a specified "make-whole" price plus accrued and unpaid interest to the redemption date. (d) The Company may redeem some or more of all the notes at the redemption price set forth in the relevant indenture, plus accrued and unpaid interest. (e) The Company may redeem some or all of the 2023 Notes at any time on or after January 15, 2019, and some or all of the 2025 Notes and 2025 Guaranteed Notes at any time on or after October 15, 2020, at the redemption prices set forth in the relevant indenture, plus accrued and unpaid interest, if any. The Company may also redeem up to 40% of each series of the Cablevision Acquisition Notes using the proceeds of certain equity offerings before October 15, 2018, at a redemption price equal to 110.125% for the 2023 Notes, 110.875% for the 2025 Notes and 106.625% for the 2025 Guaranteed Notes, in each case plus accrued and unpaid interest. In addition, at any time prior to January 15, 2019, CSC Holdings may redeem some or all of the 2023 Notes, and at any time prior to October 15, 2020, the Company may redeem some or all of the 2025 Notes and the 2025 Guaranteed Notes, at a price equal to 100% of the principal amount thereof, plus a “make whole” premium specified in the relevant indenture plus accrued and unpaid interest. (f) The carrying value of the notes was adjusted to reflect their fair value on the Cablevision Acquisition Date (aggregate reduction of $52,788 ). (g) The 2027 Guaranteed Notes are redeemable at any time on or after April 15, 2022 at the redemption prices set forth in the indenture, plus accrued and unpaid interest, if any. In addition, up to 40% may be redeemed for each series of the 2027 Guaranteed Notes using the proceeds of certain equity offerings before October 15, 2019, at a redemption price equal to 105.500% , plus accrued and unpaid interest. (h) Some or all of these notes may be redeemed at any time on or after July 15, 2018, plus accrued and unpaid interest, if any. Up to 40% of the notes may be redeemed using the proceeds of certain equity offerings before July 15, 2018, at a redemption price equal to 105.375% . (i) Some or all of these notes may be redeemed at any time on or after July 15, 2020, plus accrued and unpaid interest, if any. Up to 40% of the notes may be redeemed using the proceeds of certain equity offerings before July 15, 2018, at a redemption price equal to 107.750% . (j) Some or all of these notes may be redeemed at any time on or after May 15, 2021, plus accrued and unpaid interest, if any. Up to 40% of the notes may be redeemed using the proceeds of certain equity offerings before May 15, 2019, at a redemption price equal to 105.500% . (k) In April 2017, the Company redeemed $500,000 of the senior notes from proceeds from the CVC Term Loan facility. In September 2017, these senior notes matured and the Company repaid the remaining principal balance of $400,000 . (l) In July 2017, the Company used approximately $350,120 of the proceeds from the IPO to fund the redemption of $315,779 principal amount of CSC Holdings senior notes due October 2025 and the related call premium of approximately $34,341 which was recorded as a loss on extinguishment of debt. The Company also recorded a write-off of deferred financings costs in connection with this redemption aggregating $4,516 . (m) In April 2017, the Company redeemed $450,000 of the senior notes from proceeds from the Cequel Term Loan facility.
Schedule of Maturities of Long-term Debt	The future maturities of debt payable by the Company under its various debt obligations outstanding as of September 30, 2017 , including notes payable, collateralized indebtedness (see Note 10), and capital leases, are as follows: Years Ending December 31, Cablevision Cequel Total 2017 $ 29,925 $ 5,256 $ 35,181 2018 1,598,699 14,421 1,613,120 2019 561,995 12,713 574,708 2020 530,007 1,062,723 1,592,730 2021 3,664,638 1,263,578 4,928,216 Thereafter 10,058,245 4,428,075 14,486,320

DERIVATIVE CONTRACTS AND COLL32

DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS (Tables)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Location of Assets and Liabilities Associated With Derivative Instruments Within the Condensed Consolidated Balance Sheets	The following represents the location of the assets and liabilities associated with the Company's derivative instruments within the consolidated balance sheets: Asset Derivatives Liability Derivatives Derivatives Not Designated as Hedging Instruments Balance Sheet Location Fair Value at September 30, 2017 Fair Value at December 31, 2016 Fair Value at September 30, 2017 Fair Value at December 31, 2016 Prepaid forward contracts Derivative contracts, current $ 54,578 $ 352 $ (54,578 ) $ (13,158 ) Prepaid forward contracts Derivative contracts, long-term — 10,604 (52,488 ) — Put/Call options Liabilities under derivative contracts, current — — (48,326 ) — Interest rate swap contracts Liabilities under derivative contracts, long-term — — (69,271 ) (78,823 ) $ 54,578 $ 10,956 $ (224,663 ) $ (91,981 )
Schedule of Collateralized Debt Settlement	The following table summarizes the settlement of the Company's collateralized indebtedness relating to Comcast shares that were settled by delivering cash equal to the collateralized loan value, net of the value of the related equity derivative contracts during the nine months ended September 30, 2017 : Number of shares (a) 21,477,618 Collateralized indebtedness settled $ (617,151 ) Derivatives contracts settled (37,838 ) (654,989 ) Proceeds from new monetization contracts 662,724 Net cash proceeds $ 7,735 ______________________ (a) Share amounts are adjusted for the 2 for 1 stock split in February 2017.

FAIR VALUE MEASUREMENT (Tables)

FAIR VALUE MEASUREMENT (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	Fair Value Hierarchy September 30, 2017 December 31, 2016 Assets: Money market funds (of which $14,700 is classified as restricted cash as of December 31, 2016) Level I $ 65,801 $ 100,139 Investment securities pledged as collateral Level I 1,652,917 1,483,030 Prepaid forward contracts Level II 54,578 10,956 Liabilities: Prepaid forward contracts Level II 107,066 13,158 Put/Call Options Level II 48,326 — Interest rate swap contracts Level II 69,271 78,823 Contingent consideration related to 2017 acquisition Level III 30,000 —
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	September 30, 2017 December 31, 2016 Fair Value Hierarchy Carrying Amount (a) Estimated Fair Value Carrying Amount (a) Estimated Fair Value Altice USA debt instruments: Notes payable to affiliates and related parties Level II $ — $ — $ 1,750,000 $ 1,837,876 CSC Holdings debt instruments: Credit facility debt Level II 4,123,792 4,167,500 2,631,887 2,675,256 Collateralized indebtedness Level II 1,314,788 1,286,557 1,286,069 1,280,048 Senior guaranteed notes Level II 2,290,748 2,460,675 2,289,494 2,416,375 Senior notes and debentures Level II 6,412,789 7,421,261 6,732,816 7,731,150 Notes payable Level II 76,442 72,802 13,726 13,260 Cablevision senior notes: Level II 1,817,536 1,998,340 2,742,082 2,920,056 Cequel debt instruments: Cequel credit facility Level II 1,253,110 1,261,838 812,903 815,000 Senior secured notes Level II 2,569,559 2,745,750 2,566,802 2,689,750 Senior notes Level II 2,762,543 3,036,850 3,176,131 3,517,275 Notes payable Level II 3,083 3,083 — — $ 22,624,390 $ 24,454,656 $ 24,001,910 $ 25,896,046 (a) Amounts are net of unamortized deferred financing costs and discounts.

SHARE BASED COMPENSATION (Table

SHARE BASED COMPENSATION (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Activity for Shares	The following table summarizes activity relating to carry units: Number of Time Vesting Awards Number of Performance Based Vesting Awards Weighted Average Grant Date Fair Value Balance, December 31, 2016 192,800,000 10,000,000 $ 0.37 Granted 28,025,000 — 3.14 Forfeited (4,229,166 ) — 0.37 Balance, September 30, 2017 216,595,834 10,000,000 0.71 Awards vested at September 30, 2017 — —

RELATED PARTY TRANSACTIONS (Tab

RELATED PARTY TRANSACTIONS (Tables)	9 Months Ended
	Sep. 30, 2017
Related Party Transactions [Abstract]
Summary of related party transactions	The following table summarizes the revenue and charges related to services provided to or received from subsidiaries of Altice N.V. and Newsday: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Revenue $ 986 $ 720 $ 1,380 $ 720 Operating expenses: Programming and other direct costs $ (1,196 ) $ (642 ) $ (3,026 ) $ (642 ) Other operating expenses, net (28,332 ) (8,056 ) (73,263 ) (13,056 ) Operating expenses, net (29,528 ) (8,698 ) (76,289 ) (13,698 ) Interest expense (a) — (48,617 ) (90,405 ) (53,922 ) Loss on extinguishment of debt and write-off of deferred financing costs — — (513,723 ) — Net charges $ (28,542 ) $ (56,595 ) $ (679,037 ) $ (66,900 ) Capital Expenditures $ 72,185 $ — $ 98,234 $ — (a) See Note 9 for a discussion of interest expense related to notes payable to affiliates and related parties of $90,405 for the nine months ended September 30, 2017. Aggregate amounts that were due from and due to related parties are summarized below: September 30, 2017 December 31, 2016 Due from: Altice US Finance S.A. (a) $ 12,951 $ 12,951 Newsday (b) 4,177 6,114 Altice Management Americas (b) 615 3,117 i24NEWS (b) 3,373 — Other Altice N.V. subsidiaries (b) 37 — $ 21,153 $ 22,182 Due to: CVC 3BV (c) — 71,655 Neptune Holdings US LP (c) — 7,962 Altice Management International (d) — 44,121 ATS (b)(e) 22,541 — Newsday (b) 103 275 Other Altice N.V. subsidiaries (f) 6,358 3,350 $ 29,002 $ 127,363 (a) Represents interest on senior notes paid by the Company on behalf of the affiliate. (b) Represents amounts paid by the Company on behalf of the respective related party and for Newsday and ATS, the net amounts due from the related party also include charges for certain transition services provided. (c) Represents distributions payable to stockholders. (d) Amounts payable as of December 31, 2016 primarily represent amounts due for equipment purchases and software development services discussed above. (e) Represents amounts due to ATS for construction, maintenance, and installation services, net of charges to ATS pursuant to the TSA. See discussion above. (f) Represents amounts due to affiliates for services provided to the Company.

SEGMENT INFORMATION (Tables)

SEGMENT INFORMATION (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Schedule of Reconciliation of Adjusted EBITDA to Operating Income (Loss)	The Company has presented the components that reconcile Adjusted EBITDA to operating income, an accepted GAAP measure: Three Months Ended September 30, 2017 Three Months Ended September 30, 2016 Cablevision Cequel Total Cablevision (a) Cequel Total Operating income (loss) $ 11,185 $ 123,679 $ 134,864 $ 39,947 $ 102,832 $ 142,779 Share-based compensation 11,555 3,450 15,005 1,091 579 1,670 Restructuring and other expense 35,364 18,084 53,448 45,176 2,640 47,816 Depreciation and amortization (including impairments) 656,102 167,163 823,265 481,497 189,432 670,929 Adjusted EBITDA $ 714,206 $ 312,376 $ 1,026,582 $ 567,711 $ 295,483 $ 863,194 Nine months ended September 30, 2017 Nine months ended September 30, 2016 Cablevision Cequel Total Cablevision (a) Cequel Total Operating income (loss) $ 244,667 $ 395,213 $ 639,880 $ (32,133 ) $ 274,575 $ 242,442 Share-based compensation 28,597 12,335 40,932 1,091 579 1,670 Restructuring and other expense 105,182 37,583 142,765 143,891 11,195 155,086 Depreciation and amortization (including impairments) 1,641,477 497,299 2,138,776 526,057 559,872 1,085,929 Adjusted EBITDA $ 2,019,923 $ 942,430 $ 2,962,353 $ 638,906 $ 846,221 $ 1,485,127 (a) Reflects operating results of Cablevision from the date of acquisition.
Reconciliation of Reportable Segment Amounts to Cablevision's and CSC Holdings' Consolidated Balances	A reconciliation of reportable segment amounts to the Company's consolidated balances are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Operating income for reportable segments $ 134,864 $ 142,779 $ 639,880 $ 242,442 Items excluded from operating income: Interest expense (379,064 ) (446,242 ) (1,232,730 ) (1,015,866 ) Interest income 961 404 1,373 12,787 Gain (loss) on investments, net (18,900 ) 24,833 169,888 83,467 Gain (loss) on derivative contracts, net (16,763 ) 773 (154,270 ) (26,572 ) Gain (loss) on interest rate swap contracts 1,051 (15,861 ) 12,539 24,380 Loss on extinguishment of debt and write-off of deferred financing costs (38,858 ) — (600,240 ) (19,948 ) Other income (expense), net (65 ) 2,531 832 2,548 Loss before income taxes $ (316,774 ) $ (290,783 ) $ (1,162,728 ) $ (696,762 )
Schedule of Revenue by Products and Services and Segments	The following tables present the composition of revenue by segment for the three and nine months ended September 30, 2017 and 2016 : Three Months Ended September 30, 2017 Three Months Ended September 30, 2016 Cablevision Cequel Eliminations Total Cablevision (a) Cequel Total Residential: Pay TV $ 782,214 $ 272,178 $ — $ 1,054,392 $ 772,886 $ 279,109 $ 1,051,995 Broadband 404,153 241,941 — 646,094 366,166 212,439 578,605 Telephony 172,904 31,849 — 204,753 178,000 38,186 216,186 Business services and wholesale 230,274 94,486 — 324,760 220,352 89,014 309,366 Advertising 67,563 17,456 (480 ) 84,539 67,815 20,944 88,759 Other 7,211 5,426 — 12,637 9,480 5,830 15,310 Total Revenue $ 1,664,319 $ 663,336 $ (480 ) $ 2,327,175 $ 1,614,699 $ 645,522 $ 2,260,221 Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 Cablevision (a) Cequel Eliminations Total Cablevision (a) Cequel Total Residential: Pay TV $ 2,356,230 $ 829,380 $ — $ 3,185,610 $ 859,932 $ 840,354 $ 1,700,286 Broadband 1,177,731 709,548 — 1,887,279 406,057 613,012 1,019,069 Telephony 524,696 99,381 — 624,077 198,282 116,855 315,137 Business services and wholesale 690,168 278,123 — 968,291 244,685 260,278 504,963 Advertising 203,351 54,384 (480 ) 257,255 75,458 63,476 138,934 Other 21,366 17,314 — 38,680 14,145 18,777 32,922 Total Revenue $ 4,973,542 $ 1,988,130 $ (480 ) $ 6,961,192 $ 1,798,559 $ 1,912,752 $ 3,711,311 (a) Reflects revenue from the Cablevision Acquisition Date.
Capital Expenditures by Reportable Segment	Capital expenditures (cash basis) by reportable segment are presented below: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Cablevision $ 228,594 $ 150,815 $ 550,231 $ 150,965 Cequel 75,042 97,341 213,067 226,761 $ 303,636 $ 248,156 $ 763,298 $ 377,726

DESCRIPTION OF BUSINESS AND R37

DESCRIPTION OF BUSINESS AND RELATED MATTERS (Details)	May 31, 2017USD ($)	Jun. 21, 2016USD ($)	Dec. 21, 2015USD ($)	Sep. 16, 2015USD ($)$ / shares	Jul. 31, 2017USD ($)	Jun. 30, 2017USD ($)shares	Sep. 30, 2017USD ($)segment$ / shares	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)$ / shares	Oct. 31, 2015USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable business segments | segment							2
Business Acquisition [Line Items]
Document Period End Date							Sep. 30, 2017
Business Combination, Description [Abstract]
Price per share | $ / shares							$ 30
Percentage of issued stock owned by the parent company							70.20%
Voting power of parent company, percentage							98.20%
Proceeds from issuance or sale of equity						$ 362,069,000
Underwriting discount and share issuance expense						$ 13,609,000
Senior Notes							$ 15,853,175,000		$ 17,507,325,000
Principal Amount							5,429,338,000
Conversion of notes payable to affiliates and related parties to common stock							2,264,252,000	$ 0
Common stock, par value (in dollars per share) | $ / shares									$ 0.01
10.875% Senior Notes due in 2025
Business Combination, Description [Abstract]
Stated interest rate					10.875%
Redemption call premium					$ 34,341,000
Senior Notes
Business Combination, Description [Abstract]
Principal Amount							16,289,245,000
Senior Notes | 10.875% Senior Notes due in 2025
Business Combination, Description [Abstract]
Senior Notes					315,779,000
Senior Notes | 10.125% Notes due January 15, 2023
Business Combination, Description [Abstract]
Senior Notes							1,777,085,000		$ 1,774,750,000
Principal Amount							$ 1,800,000,000
Stated interest rate							10.125%
Senior Notes | 10.875% Notes due October 15, 2025
Business Combination, Description [Abstract]
Senior Notes							$ 1,660,583,000		1,970,379,000
Principal Amount							$ 1,684,221,000
Stated interest rate							10.875%
Senior Notes | 6.625% Notes due October 15, 2025
Business Combination, Description [Abstract]
Senior Notes							$ 986,394,000		$ 985,469,000
Principal Amount							$ 1,000,000,000
Stated interest rate							6.625%
Common Class A
Business Combination, Description [Abstract]
Number of shares issued (in shares) | shares						71,724,139
Initial public offering shares sold by company | shares						12,068,966
Initial public offering shares sold by existing shareholders (in shares) | shares						59,655,173
Common stock, par value (in dollars per share) | $ / shares							$ 0.01
Common Class B
Business Combination, Description [Abstract]
Common stock, par value (in dollars per share) | $ / shares							0.01
Affiliates | Notes payable
Business Combination, Description [Abstract]
Principal Amount		$ 1,750,000,000
Cablevision Systems Corp.
Business Combination, Description [Abstract]
Business acquisition, share price (dollars per share) | $ / shares				$ 34.90
Consideration transfered		9,958,323,000
Cablevision Systems Corp. | Common Class A
Business Combination, Description [Abstract]
Common stock, par value (in dollars per share) | $ / shares							0.01
Cablevision Systems Corp. | Common Class B
Business Combination, Description [Abstract]
Common stock, par value (in dollars per share) | $ / shares							$ 0.01
Cablevision Systems Corp. | Neptune Finco Corp. | Term Loan | Senior Secured Credit Facilities
Business Combination, Description [Abstract]
Principal Amount										$ 3,800,000,000
Cablevision Systems Corp. | Neptune Finco Corp. | Term Loan | Revolving Credit Facility | Senior Secured Credit Facilities
Business Combination, Description [Abstract]
Line of credit facility, aggregate principal amount										2,000,000,000
Cablevision Systems Corp. | Neptune Finco Corp. | Senior Notes | 10.125% Notes due January 15, 2023
Business Combination, Description [Abstract]
Principal Amount										$ 1,800,000,000
Stated interest rate										10.125%
Cablevision Systems Corp. | Neptune Finco Corp. | Senior Notes | 10.875% Notes due October 15, 2025
Business Combination, Description [Abstract]
Principal Amount										$ 2,000,000,000
Stated interest rate										10.875%
Cablevision Systems Corp. | Neptune Finco Corp. | Senior Notes | 6.625% Notes due October 15, 2025
Business Combination, Description [Abstract]
Principal Amount										$ 1,000,000,000
Stated interest rate										6.625%
Cablevision Systems Corp. | Affiliates
Business Combination, Description [Abstract]
Consideration transfered				$ 1,000,000,000
Indirect ownership interest by co-investors				30.00%
Cablevision Systems Corp. | Affiliates | Notes payable
Business Combination, Description [Abstract]
Principal Amount		1,750,000,000
Cablevision Systems Corp. | Affiliates | Notes payable | Notes Payable at 10.75%
Business Combination, Description [Abstract]
Principal Amount		$ 875,000,000
Stated interest rate		10.75%
Cablevision Systems Corp. | Affiliates | Notes payable | Notes Payable at 11%
Business Combination, Description [Abstract]
Principal Amount		$ 875,000,000
Stated interest rate		11.00%
Cequel Corp.
Business Combination, Description [Abstract]
Consideration transfered			$ 3,973,528,000
Percentage of shares acquired			70.00%
Cash consideration			$ 2,797,928,000
Retained equity			$ 675,600,000
Ownership percentage by noncontrolling owners			30.00%
Cequel Corp. | Affiliates | Senior Notes
Business Combination, Description [Abstract]
Consideration transferred, debt issuance by an affiliate of parent company			$ 500,000,000
Over-Allotment Option
Business Combination, Description [Abstract]
Number of shares issued (in shares) | shares						7,781,110
IPO
Business Combination, Description [Abstract]
Consideration received on transaction, used to repay long term debt					$ 350,120,000
Co-investors
Business Combination, Description [Abstract]
Conversion of notes payable to affiliates and related parties to common stock	$ 525,000,000
Subsidiary of Altice N.V.
Business Combination, Description [Abstract]
Conversion of notes payable to affiliates and related parties to common stock	$ 1,225,000,000

SUMMARY OF SIGNIFICANT ACCOUN38

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
Accounting Policies [Abstract]
Unrealized excess tax benefits recognized with the adoption of ASU 2016-09	$ 308,231

BUSINESS COMBINATIONS - Assets

BUSINESS COMBINATIONS - Assets and Liabilities Acquired (Details) - USD ($) $ in Thousands	Jun. 21, 2016	Sep. 30, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 7,993,499	$ 7,992,700
Cablevision Systems Corp.
Business Acquisition [Line Items]
Current assets	$ 1,923,071
Accounts receivable	271,305
Property, plant and equipment	4,864,621
Goodwill	5,842,172
Indefinite-lived cable television franchises	8,113,575
Other non-current assets	748,998
Current liabilities	(2,311,201)
Long-term debt	(8,355,386)
Deferred income taxes.	(6,832,773)
Other non-current liabilities	(189,355)
Total	9,958,323
Customer relationships | Cablevision Systems Corp.
Business Acquisition [Line Items]
Finite-lived intangible assets	4,850,000
Trade names | Cablevision Systems Corp.
Business Acquisition [Line Items]
Finite-lived intangible assets	$ 1,010,000
Finite-lived intangible asset, useful life	12 years
Amortizable intangible assets | Cablevision Systems Corp.
Business Acquisition [Line Items]
Finite-lived intangible assets	$ 23,296
Minimum | Cablevision Systems Corp.
Business Acquisition [Line Items]
Property, plant and equipment, useful life	2 years
Minimum | Customer relationships
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life		8 years
Minimum | Customer relationships | Cablevision Systems Corp.
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	8 years
Minimum | Trade names
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life		2 years
Minimum | Amortizable intangible assets
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life		1 year
Minimum | Amortizable intangible assets | Cablevision Systems Corp.
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	1 year
Maximum | Cablevision Systems Corp.
Business Acquisition [Line Items]
Property, plant and equipment, useful life	18 years
Maximum | Customer relationships
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life		18 years
Maximum | Customer relationships | Cablevision Systems Corp.
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	18 years
Maximum | Trade names
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life		4 years
Maximum | Amortizable intangible assets
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life		15 years
Maximum | Amortizable intangible assets | Cablevision Systems Corp.
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	15 years

BUSINESS COMBINATIONS - Narrati

BUSINESS COMBINATIONS - Narrative (Details) - USD ($) $ in Thousands	Jun. 21, 2016	Mar. 31, 2017	Sep. 30, 2017
Business Acquisition [Line Items]
Goodwill recorded in connection with acquisition in first quarter 2017 (Cablevision Segment)			$ 20,687
Cablevision Systems Corp.
Business Acquisition [Line Items]
Consideration transfered	$ 9,958,323
2017 Acquisition
Business Acquisition [Line Items]
Goodwill recorded in connection with acquisition in first quarter 2017 (Cablevision Segment)		$ 20,687
Consideration transfered		75,000
Customer relationships | 2017 Acquisition
Business Acquisition [Line Items]
Amortizable intangible assets acquired		45,000
Other amortizable intangible assets | 2017 Acquisition
Business Acquisition [Line Items]
Amortizable intangible assets acquired		$ 9,400

BUSINESS COMBINATIONS - Pro For

BUSINESS COMBINATIONS - Pro Forma Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Business Combinations [Abstract]
Revenue	$ 6,848,916
Net loss	$ (527,851)

NET LOSS PER SHARE ATTRIBUTAB42

NET LOSS PER SHARE ATTRIBUTABLE TO STOCKHOLDERS (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reconciliation of Weighted Average Shares Used in Calculations of Basic and Diluted Net Income Per Share [Abstract]
Basic and diluted weighted average common shares (in shares)	737,069,000	649,525,000	682,234,000	649,524,942

GROSS VERSUS NET REVENUE RECO43

GROSS VERSUS NET REVENUE RECOGNITION (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue Recognition [Abstract]
Franchise fees and other taxes and fees	$ 64,254	$ 62,249	$ 194,045	$ 92,146

SUPPLEMENTAL CASH FLOW INFORM44

SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 21, 2016
Continuing Operations:
Conversion of notes payable to affiliates and related parties of $1,750,000 (together with accrued and unpaid interest and applicable premium) to common stock (See Note 9)	$ 2,264,252,000	$ 0
Property and equipment accrued but unpaid	84,847,000	83,722,000
Leasehold improvements paid by landlord	3,998,000	0
Notes payable to vendor	25,879,000	0
Supplemental Data:
Cash interest paid	1,481,363,000	931,345,000
Income taxes paid, net	26,396,000	$ 5,342,000
Debt Instrument [Line Items]
Principal Amount	$ 5,429,338,000
Affiliates | Notes payable
Debt Instrument [Line Items]
Principal Amount			$ 1,750,000,000

RESTRUCTURING COSTS AND OTHER45

RESTRUCTURING COSTS AND OTHER EXPENSE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring Reserve [Roll Forward]
Accrual, beginning balance			$ 110,516
Restructuring charges		$ 44,656	141,078	$ 141,818
Payments and other			(96,738)
Accrual, ending balance	$ 154,856		154,856
Transaction costs	1,367	$ 3,177	1,687	$ 13,285
Severance and Other Employee Related Costs
Restructuring Reserve [Roll Forward]
Accrual, beginning balance			102,119
Restructuring charges			140,071
Payments and other			(92,905)
Accrual, ending balance	149,285		149,285
Facility Realignment and Other Costs
Restructuring Reserve [Roll Forward]
Accrual, beginning balance			8,397
Restructuring charges			1,007
Payments and other			(3,833)
Accrual, ending balance	5,571		5,571
Cablevision Systems Corp.
Restructuring Reserve [Roll Forward]
Cumulative restructuring costs	302,870		302,870
Cequel Corp.
Restructuring Reserve [Roll Forward]
Cumulative restructuring costs	$ 64,784		$ 64,784

INTANGIBLE ASSETS - Summary of

INTANGIBLE ASSETS - Summary of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 7,075,019		$ 7,075,019
Accumulated Amortization	(1,648,424)		(1,648,424)
Net Carrying Amount	5,426,595		5,426,595
Amortization of intangible assets	426,419	$ 258,670	981,657	$ 402,994
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,970,884		5,970,884
Accumulated Amortization	(1,207,217)		(1,207,217)		$ (580,276)
Net Carrying Amount	4,763,667		4,763,667		5,345,608
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,067,083		1,067,083
Accumulated Amortization	(432,402)		(432,402)		(83,397)
Net Carrying Amount	634,681		$ 634,681		983,386
Remaining amortization period			3 years
Remaining amortization period, in-use period			1 year
Remaining amortization period, defensive asset			2 years
2017 Amortization expense remaining	545,805		$ 545,805
Amortization of intangible assets			334,312
Amortization expense, 2018	355,006		355,006
Amortization expense, 2019	46,627		46,627
Amortization expense, 2020	18,140		18,140
Other amortizable intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	37,052		37,052
Accumulated Amortization	(8,805)		(8,805)		(3,093)
Net Carrying Amount	$ 28,247		$ 28,247		$ 23,650
Minimum | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life			8 years
Minimum | Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life			2 years
Minimum | Other amortizable intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life			1 year
Maximum | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life			18 years
Maximum | Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life			4 years
Maximum | Other amortizable intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life			15 years

INTANGIBLE ASSETS - Summary o47

INTANGIBLE ASSETS - Summary of Acquired Indefinite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Acquired Indefinite-lived Intangible Assets [Line Items]
Cable television franchises	$ 13,020,081	$ 13,020,081
Goodwill	7,993,499	$ 7,992,700
Total	21,013,580
Cablevision Systems Corp.
Acquired Indefinite-lived Intangible Assets [Line Items]
Cable television franchises	8,113,575
Goodwill	5,839,757
Total	13,953,332
Cequel Corp.
Acquired Indefinite-lived Intangible Assets [Line Items]
Cable television franchises	4,906,506
Goodwill	2,153,742
Total	$ 7,060,248

INTANGIBLE ASSETS - Goodwill (D

INTANGIBLE ASSETS - Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 7,992,700
Goodwill recorded in connection with acquisition in first quarter 2017 (Cablevision Segment)	20,687
Adjustments to purchase accounting relating to Cablevision Acquisition	3,213
Transfer of Cablevision goodwill related to Altice Technical Services US Corp. (See Note 14 for further details)	(23,101)
Goodwill, ending balance	$ 7,993,499

DEBT - CSC Holdings Credit Faci

DEBT - CSC Holdings Credit Facilities (Details)	Mar. 15, 2017USD ($)	Oct. 31, 2017USD ($)	Apr. 30, 2017USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)	Jun. 21, 2016USD ($)
Debt Instrument [Line Items]
Issuance of common stock pursuant to IPO						$ 2,264,252,000
Principal Amount				$ 5,429,338,000		5,429,338,000
Credit facility				5,376,902,000		5,376,902,000		$ 3,444,790,000
Redemption of debt amount						1,729,400,000	$ 0
Loss on extinguishment of debt and write-off of deferred financing costs	$ 18,976,000			38,858,000	$ 0	600,240,000	$ 19,948,000
Cash distributions to shareholders						$ 840,035,000
Document Period End Date						Sep. 30, 2017
Senior Notes
Debt Instrument [Line Items]
Principal Amount				$ 16,289,245,000		$ 16,289,245,000
Existing Term Notes | Senior Notes
Debt Instrument [Line Items]
Repayments of lines of credit			$ 2,493,750,000
8.625% Senior Notes Due September 2017 | Senior Notes
Debt Instrument [Line Items]
Redemption of debt amount			$ 500,000,000
Stated interest rate			8.625%
CSC Credit Facilities
Debt Instrument [Line Items]
Percentage of proceeds from asset sales required to pay down term loans						100.00%
Percentage of excess cash flow required when minimum leverage ratio is not met						50.00%
Percentage of excess cash flow required to pay down term loans when minimum leverage ratio is fulfilled						0.00%
Minimum debt leverage ratio required for zero percent of excess cash flow obligation to prepay debt						4.5
Line of credit facility, covenant, leverage ratio				5		5
Line of credit facility, covenant, minimum undrawn letters of credit						$ 15,000,000
Revolving Credit Facility | CSC Holdings Revolving Credit Facility
Debt Instrument [Line Items]
Principal Amount				$ 1,175,000,000		1,175,000,000
Credit facility				1,149,024,000		1,149,024,000		145,013,000
Line of credit facility, aggregate principal amount									$ 2,300,000,000
Repayments of lines of credit						350,256,000
Proceeds from credit facility debt				500,000,000		1,350,000,000
Cash distributions to shareholders						$ 500,000,000
Line of credit facility periodic payment, percentage of principal						0.25%
Line of credit facility, periodic payment amount						$ 7,500,000
Revolving Credit Facility | CSC Holdings Revolving Credit Facility | Alternate Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate						2.25%
Revolving Credit Facility | CSC Holdings Revolving Credit Facility | Eurodollar
Debt Instrument [Line Items]
Basis spread on variable rate						3.25%
Term Loan | CSC Holdings Term Loan Facility
Debt Instrument [Line Items]
Principal Amount				2,992,500,000		$ 2,992,500,000			$ 3,000,000,000
Credit facility				2,974,768,000		$ 2,974,768,000		$ 2,486,874,000
Term Loan | CSC Holdings Term Loan Facility | Alternate Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate						1.25%
Term Loan | CSC Holdings Term Loan Facility | Eurodollar
Debt Instrument [Line Items]
Basis spread on variable rate						2.25%
Term Loan | CSC Holdings Term Loan Facility | Senior Notes
Debt Instrument [Line Items]
Credit facility				$ 2,992,500,000		$ 2,992,500,000
Term Loan | CVC Term Loan Facility
Debt Instrument [Line Items]
Principal Amount	3,000,000,000
Line of credit facility, increase in borrowing capacity	$ 500,000,000
Subsequent Event | Revolving Credit Facility | CSC Holdings Revolving Credit Facility
Debt Instrument [Line Items]
Repayments of lines of credit		$ 50,000,000

DEBT - Cequel Credit Facilities

DEBT - Cequel Credit Facilities (Details) - USD ($)	Mar. 15, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Line of Credit Facility [Line Items]
Credit facility		$ 5,376,902,000		$ 5,376,902,000		$ 3,444,790,000
Redemption of debt amount				1,729,400,000	$ 0
Loss on extinguishment of debt and write-off of deferred financing costs	$ 18,976,000	38,858,000	$ 0	600,240,000	$ 19,948,000
Cequel Term Loan Facility | Term Loan
Line of Credit Facility [Line Items]
Line of credit facility, aggregate principal amount	1,265,000,000	1,265,000,000		1,265,000,000
Line of credit facility, increase in borrowing capacity	450,000,000
Credit facility	812,963,000	1,253,110,000		$ 1,253,110,000		812,903,000
Loss on extinguishment of debt and write-off of deferred financing costs	28,684,000
Line of credit facility periodic payment, percentage of principal				0.25%
Line of credit facility, periodic payment amount				$ 3,163,000
Cequel Term Loan Facility | Term Loan | Alternate Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate				1.25%
Cequel Term Loan Facility | Term Loan | Eurodollar
Line of Credit Facility [Line Items]
Basis spread on variable rate				2.25%
Cequel Term Loan Facility | Term Loan | Senior Notes
Line of Credit Facility [Line Items]
Credit facility		1,261,838,000		$ 1,261,838,000
Cequel Revolving Credit Facility | Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, aggregate principal amount		350,000,000		350,000,000
Credit facility		$ 0		$ 0		$ 0
Cequel Revolving Credit Facility | Revolving Credit Facility | Alternate Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate				2.25%
Cequel Revolving Credit Facility | Revolving Credit Facility | Eurodollar
Line of Credit Facility [Line Items]
Basis spread on variable rate				3.25%
Cequel Credit Facilities
Line of Credit Facility [Line Items]
Percentage of proceeds from asset sales required to pay down term loans				100.00%
Percentage of excess cash flow required when minimum leverage ratio is not met				50.00%
Percentage of excess cash flow required to pay down term loans when minimum leverage ratio is fulfilled				0.00%
Minimum debt leverage ratio required for zero percent of excess cash flow obligation to prepay debt				4.5
Leverage maintenance covenant				5
6.375% Senior Notes due September 15, 2020 | Senior Notes
Line of Credit Facility [Line Items]
Redemption of debt amount	$ 450,000,000
Stated interest rate	6.375%	6.375%		6.375%

DEBT - Credit Facilities Outsta

DEBT - Credit Facilities Outstanding (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Mar. 15, 2017	Dec. 31, 2016	Jun. 21, 2016
Debt Instrument [Line Items]
Document Period End Date	Sep. 30, 2017
Principal Amount	$ 5,429,338,000
Credit facility, Carrying Value	5,376,902,000		$ 3,444,790,000
Less: Current portion	92,650,000		33,150,000
Credit facility, noncurrent	$ 5,284,252,000		3,411,640,000
CSC Holdings Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Stated interest rate	4.49%
Principal Amount	$ 1,175,000,000
Credit facility, Carrying Value	1,149,024,000		145,013,000
Letters of credit outstanding	123,473,000
Line of credit facility, remaining borrowing capacity	$ 1,001,527,000
CSC Holdings Term Loan Facility | Term Loan
Debt Instrument [Line Items]
Stated interest rate	3.48%
Principal Amount	$ 2,992,500,000			$ 3,000,000,000
Credit facility, Carrying Value	$ 2,974,768,000		2,486,874,000
Cequel Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Stated interest rate	0.00%
Principal Amount	$ 0
Credit facility, Carrying Value	0		0
Letters of credit outstanding	16,575,000
Line of credit facility, remaining borrowing capacity	$ 333,425,000
Cequel Term Loan Facility | Term Loan
Debt Instrument [Line Items]
Stated interest rate	3.49%
Principal Amount	$ 1,261,838,000
Credit facility, Carrying Value	$ 1,253,110,000	$ 812,963,000	$ 812,903,000

DEBT - Senior Guaranteed Notes

DEBT - Senior Guaranteed Notes and Senior Notes and Debentures (Details) - USD ($)	Mar. 15, 2017	Jun. 21, 2016	Sep. 30, 2017	Jul. 31, 2017	Apr. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Debt Instrument [Line Items]
Document Period End Date						Sep. 30, 2017
Principal Amount			$ 5,429,338,000			$ 5,429,338,000
Carrying Amount			15,853,175,000			15,853,175,000		$ 17,507,325,000
Less: Current portion			1,572,358,000			1,572,358,000		926,045,000
Long-term debt			14,280,817,000			14,280,817,000		16,581,280,000
Redemption of debt amount						1,729,400,000	$ 0
10.875% Senior Notes due in 2025
Debt Instrument [Line Items]
Interest Rate				10.875%
Senior Notes
Debt Instrument [Line Items]
Principal Amount			$ 16,289,245,000			$ 16,289,245,000
Senior Notes | 7.875% Notes due February 15, 2018
Debt Instrument [Line Items]
Interest Rate			7.875%			7.875%
Principal Amount			$ 300,000,000			$ 300,000,000
Carrying Amount			$ 303,531,000			$ 303,531,000		310,334,000
Senior Notes | 7.625% Notes due July 15, 2018
Debt Instrument [Line Items]
Interest Rate			7.625%			7.625%
Principal Amount			$ 500,000,000			$ 500,000,000
Carrying Amount			$ 511,312,000			$ 511,312,000		521,654,000
Senior Notes | 8.625% Notes due February 15, 2019
Debt Instrument [Line Items]
Interest Rate			8.625%			8.625%
Principal Amount			$ 526,000,000			$ 526,000,000
Carrying Amount			$ 544,422,000			$ 544,422,000		553,804,000
Senior Notes | 6.75% Notes due November 15, 2021
Debt Instrument [Line Items]
Interest Rate			6.75%			6.75%
Principal Amount			$ 1,000,000,000			$ 1,000,000,000
Carrying Amount			$ 957,954,000			$ 957,954,000		951,702,000
Senior Notes | 5.25% Notes due June 1, 2024
Debt Instrument [Line Items]
Interest Rate			5.25%			5.25%
Principal Amount			$ 750,000,000			$ 750,000,000
Carrying Amount			$ 657,903,000			$ 657,903,000		650,193,000
Senior Notes | 10.125% Notes due January 15, 2023
Debt Instrument [Line Items]
Interest Rate			10.125%			10.125%
Principal Amount			$ 1,800,000,000			$ 1,800,000,000
Carrying Amount			$ 1,777,085,000			$ 1,777,085,000		1,774,750,000
Senior Notes | 10.875% Notes due October 15, 2025
Debt Instrument [Line Items]
Interest Rate			10.875%			10.875%
Principal Amount			$ 1,684,221,000			$ 1,684,221,000
Carrying Amount			$ 1,660,583,000			$ 1,660,583,000		1,970,379,000
Write-off of deferred financings costs				$ 4,516,000
Loss on extinguishment of debt				34,341,000
Senior Notes | 6.625% Notes due October 15, 2025
Debt Instrument [Line Items]
Interest Rate			6.625%			6.625%
Principal Amount			$ 1,000,000,000			$ 1,000,000,000
Carrying Amount			$ 986,394,000			$ 986,394,000		985,469,000
Senior Notes | 5.5% Notes due April 15, 2027
Debt Instrument [Line Items]
Interest Rate			5.50%			5.50%
Principal Amount			$ 1,310,000,000			$ 1,310,000,000
Carrying Amount			$ 1,304,353,000			$ 1,304,353,000		1,304,025,000
Redeemable debt, percent						40.00%
Redemption price, percentage						105.50%
Senior Notes | 8.625% Notes due September 15, 2017
Debt Instrument [Line Items]
Interest Rate			8.625%			8.625%
Principal Amount			$ 0			$ 0
Carrying Amount			0			$ 0		926,045,000
Extinguishment of debt			$ 400,000,000		$ 500,000,000
Senior Notes | 7.75% Notes due April 15, 2018
Debt Instrument [Line Items]
Interest Rate			7.75%			7.75%
Principal Amount			$ 750,000,000			$ 750,000,000
Carrying Amount			$ 757,515,000			$ 757,515,000		767,545,000
Senior Notes | 8.0% Notes due April 51, 2020
Debt Instrument [Line Items]
Interest Rate			8.00%			8.00%
Principal Amount			$ 500,000,000			$ 500,000,000
Carrying Amount			$ 491,224,000			$ 491,224,000		488,992,000
Senior Notes | 5.875% Notes due September 15, 2022
Debt Instrument [Line Items]
Interest Rate			5.875%			5.875%
Principal Amount			$ 649,024,000			$ 649,024,000
Carrying Amount			$ 568,796,000			$ 568,796,000		559,500,000
Senior Notes | 6.375% Senior Notes due September 15, 2020
Debt Instrument [Line Items]
Interest Rate	6.375%		6.375%			6.375%
Principal Amount			$ 1,050,000,000			$ 1,050,000,000
Carrying Amount			$ 1,025,616,000			$ 1,025,616,000		1,457,439,000
Redemption of debt amount	$ 450,000,000
Senior Notes | 5.125% Senior Notes due December 15, 2021
Debt Instrument [Line Items]
Interest Rate			5.125%			5.125%
Principal Amount			$ 1,250,000,000			$ 1,250,000,000
Carrying Amount			$ 1,132,926,000			$ 1,132,926,000		1,115,767,000
Senior Notes | 5.375% Senior Notes due July 15, 2023
Debt Instrument [Line Items]
Interest Rate			5.375%			5.375%
Principal Amount			$ 1,100,000,000			$ 1,100,000,000
Carrying Amount			$ 1,081,815,000			$ 1,081,815,000		1,079,869,000
Redeemable debt, percent						40.00%
Redemption price, percentage						105.375%
Senior Notes | 7.75% Senior Notes due July 15, 2025
Debt Instrument [Line Items]
Interest Rate			7.75%			7.75%
Principal Amount			$ 620,000,000			$ 620,000,000
Carrying Amount			$ 604,001,000			$ 604,001,000		602,925,000
Redeemable debt, percent						40.00%
Redemption price, percentage						107.75%
Senior Notes | 5.5% Senior Notes due May 15, 2026
Debt Instrument [Line Items]
Interest Rate			5.50%			5.50%
Principal Amount			$ 1,500,000,000			$ 1,500,000,000
Carrying Amount			$ 1,487,745,000			$ 1,487,745,000		$ 1,486,933,000
Redeemable debt, percent						40.00%
Redemption price, percentage						105.50%
Senior Notes | Senior Notes due in 2025
Debt Instrument [Line Items]
Redemption price, percentage						100.00%
Senior Notes | 10.875% Senior Notes due in 2025
Debt Instrument [Line Items]
Carrying Amount				315,779,000
Repurchase of senior notes				315,779,000
Cablevision Systems Corp. | Senior Notes | 10.125% Notes due January 15, 2023
Debt Instrument [Line Items]
Redemption price, percentage						110.125%
Cablevision Systems Corp. | Senior Notes | 10.875% Notes due October 15, 2025
Debt Instrument [Line Items]
Redemption price, percentage						110.875%
Cablevision Systems Corp. | Senior Notes | 6.625% Notes due October 15, 2025
Debt Instrument [Line Items]
Redemption price, percentage						106.625%
Cablevision Systems Corp. | Senior Notes | CSC Holdings Senior Notes
Debt Instrument [Line Items]
Redeemable debt, percent						40.00%
Adjustment to fair value		$ 52,788,000
IPO
Debt Instrument [Line Items]
Consideration received on transaction, used to repay long term debt				$ 350,120,000

DEBT - Notes Payable to Affilia

DEBT - Notes Payable to Affiliates and Related Perties (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Jun. 21, 2016
Debt Instrument [Line Items]
Principal Amount	$ 5,429,338,000
Affiliates
Debt Instrument [Line Items]
Interest payable		$ 102,557,000
Affiliates | Notes payable
Debt Instrument [Line Items]
Principal Amount			$ 1,750,000,000
Cablevision Systems Corp. | Affiliates | Notes payable
Debt Instrument [Line Items]
Principal Amount			1,750,000,000
Interest payable			529,000
Debt premium			513,723,000
Interest expense	$ 90,405,000
Notes Payable at 10.75% | Cablevision Systems Corp. | Affiliates | Notes payable
Debt Instrument [Line Items]
Principal Amount			$ 875,000,000
Stated interest rate			10.75%
Notes Payable at 11% | Cablevision Systems Corp. | Affiliates | Notes payable
Debt Instrument [Line Items]
Principal Amount			$ 875,000,000
Stated interest rate			11.00%

DEBT - Summary of Debt Maturiti

DEBT - Summary of Debt Maturities (Details) $ in Thousands	Sep. 30, 2017USD ($)
Debt Instrument [Line Items]
2,017	$ 35,181
2,018	1,613,120
2,019	574,708
2,020	1,592,730
2,021	4,928,216
Thereafter	14,486,320
Cablevision Systems Corp.
Debt Instrument [Line Items]
2,017	29,925
2,018	1,598,699
2,019	561,995
2,020	530,007
2,021	3,664,638
Thereafter	10,058,245
Cequel Corp.
Debt Instrument [Line Items]
2,017	5,256
2,018	14,421
2,019	12,713
2,020	1,062,723
2,021	1,263,578
Thereafter	$ 4,428,075

DERIVATIVE CONTRACTS AND COLL55

DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS - Location of Assets and Liabilities Within the Consolidated Balance Sheets (Details) - Not Designated as Hedging Instruments - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivative Instruments, Fair Value [Abstract]
Asset Derivatives	$ 54,578	$ 10,956
Liability Derivatives	(224,663)	(91,981)
Prepaid forward contracts | Current derivative contracts
Derivative Instruments, Fair Value [Abstract]
Asset Derivatives	54,578	352
Liability Derivatives	(54,578)	(13,158)
Prepaid forward contracts | Long-term derivative contracts
Derivative Instruments, Fair Value [Abstract]
Asset Derivatives	0	10,604
Liability Derivatives	(52,488)	0
Put-Call Options | Liabilities under derivative contracts, current
Derivative Instruments, Fair Value [Abstract]
Asset Derivatives	0	0
Liability Derivatives	(48,326)	0
Interest Rate Swap | Long-term liabilities under derivative contracts
Derivative Instruments, Fair Value [Abstract]
Asset Derivatives	0	0
Liability Derivatives	$ (69,271)	$ (78,823)

DERIVATIVE CONTRACTS AND COLL56

DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS - Settlements of Collateralized Indebtedness (Details) $ in Thousands	1 Months Ended	9 Months Ended
	Feb. 28, 2017	Sep. 30, 2017USD ($)shares	Sep. 30, 2016USD ($)
Derivative [Line Items]
Number of shares (in shares) | shares		21,477,618
Collateralized indebtedness settled		$ (617,151)
Derivatives contracts settled		(37,838)
Derivatives contracts settled		(654,989)	$ (143,102)
Proceeds from new monetization contracts		662,724	$ 179,388
Net cash proceeds		$ 7,735
Comcast
Derivative [Line Items]
Stock spit, conversion ratio	2

DERIVATIVE CONTRACTS AND COLL57

DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS - Narrative (Details)	1 Months Ended		3 Months Ended		9 Months Ended
	Oct. 31, 2017USD ($)	Apr. 30, 2017USD ($)$ / sharesshares	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)instrument	Sep. 30, 2017USD ($)shares	Sep. 30, 2016USD ($)instrument	Dec. 31, 2016USD ($)
Derivative [Line Items]
Document Period End Date					Sep. 30, 2017
Gain (loss) on investments, net			$ (18,900,000)	$ 24,833,000	$ 169,888,000	$ 83,467,000
Shares related to monetization contracts (in shares) | shares					21,477,618
Notes payable | Notes related to derivative contracts
Derivative [Line Items]
Long-term debt		$ 111,657,000
Discount on notes		$ 46,864,000
Not Designated as Hedging Instruments
Derivative [Line Items]
Derivative liability			224,663,000		$ 224,663,000		$ 91,981,000
Put-Call Options
Derivative [Line Items]
Derivative assets, collateral			45,000,000		45,000,000
Realized loss on settlement of derivative			24,039,000
Loss on derivative contracts			72,365,000
Put-Call Options | Subsequent Event
Derivative [Line Items]
Loss on derivative contracts	$ 25,000,000
Interest Rate Swap
Derivative [Line Items]
Amount of gain (loss) recognized			$ 1,051,000		$ 12,539,000
Interest Rate Swap | Not Designated as Hedging Instruments
Derivative [Line Items]
Number of derivative instruments held | instrument				2		2
Interest Rate Swap, Conversion, Tranche One | Not Designated as Hedging Instruments
Derivative [Line Items]
Derivative notional amount				$ 750,000,000		$ 750,000,000
Derivative, fixed interest rate			1.6655%		1.6655%
Interest Rate Swap, Conversion, Tranche Two | Not Designated as Hedging Instruments
Derivative [Line Items]
Derivative notional amount				$ 750,000,000		$ 750,000,000
Derivative, fixed interest rate			1.68%		1.68%
Prepaid forward contracts
Derivative [Line Items]
Amount of gain (loss) recognized			$ 55,602,000		$ (81,905,000)
Monetization contract
Derivative [Line Items]
Shares related to monetization contracts (in shares) | shares		32,153,118
Maximum hedge price at which downside protection is provided (in dollars per share) | $ / shares		$ 35.47
Maximum hedge price at which upside benefit is provided (in dollars per share) | $ / shares		$ 44.72
Fair value of derivative contracts, net		$ 64,793,000
Liabilities under derivative contracts, current | Put-Call Options | Not Designated as Hedging Instruments
Derivative [Line Items]
Derivative liability			$ 48,326,000		$ 48,326,000		$ 0

FAIR VALUE MEASUREMENT - Assets

FAIR VALUE MEASUREMENT - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value Measured on a Recurring Basis | Level III
Liabilities:
Contingent consideration related to 2017 acquisition	$ 30,000	$ 0
Prepaid forward contracts | Fair Value Measured on a Recurring Basis | Level II
Assets:
Derivative asset	54,578	10,956
Liabilities:
Derivative liability	107,066	13,158
Put-Call Options | Fair Value Measured on a Recurring Basis | Level II
Liabilities:
Derivative liability	48	0
Interest rate swap contracts | Fair Value Measured on a Recurring Basis | Level II
Liabilities:
Derivative liability	69,271	78,823
Investment securities pledged as collateral | Fair Value Measured on a Recurring Basis | Level I
Assets:
Investment securities	1,652,917	1,483,030
Money market funds (of which $14,700 is classified as restricted cash as of December 31, 2016)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Restricted cash	350,121	14,700
Money market funds (of which $14,700 is classified as restricted cash as of December 31, 2016) | Fair Value Measured on a Recurring Basis | Level I
Assets:
Cash and cash equivalents	$ 65,801	$ 100,139

FAIR VALUE MEASUREMENT - Fair V

FAIR VALUE MEASUREMENT - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Document Period End Date	Sep. 30, 2017
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	$ 22,624,390	$ 24,001,910
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	24,454,656	25,896,046
Altice N.V. | Notes payable to affiliates and related parties | Carrying Amount | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	0	1,750,000
Altice N.V. | Notes payable to affiliates and related parties | Estimated Fair Value | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	0	1,837,876
CSC Holdings | Credit facility debt | Carrying Amount | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	4,123,792	2,631,887
CSC Holdings | Credit facility debt | Estimated Fair Value | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	4,167,500	2,675,256
CSC Holdings | Collateralized indebtedness | Carrying Amount | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	1,314,788	1,286,069
CSC Holdings | Collateralized indebtedness | Estimated Fair Value | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	1,286,557	1,280,048
CSC Holdings | Senior guaranteed notes | Carrying Amount | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	2,290,748	2,289,494
CSC Holdings | Senior guaranteed notes | Estimated Fair Value | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	2,460,675	2,416,375
CSC Holdings | Senior notes and debentures | Carrying Amount | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	6,412,789	6,732,816
CSC Holdings | Senior notes and debentures | Estimated Fair Value | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	7,421,261	7,731,150
CSC Holdings | Notes payable | Carrying Amount | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	76,442	13,726
CSC Holdings | Notes payable | Estimated Fair Value | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	72,802	13,260
Cablevision Systems Corp. | Senior notes and debentures | Carrying Amount | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	1,817,536	2,742,082
Cablevision Systems Corp. | Senior notes and debentures | Estimated Fair Value | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	1,998,340	2,920,056
Cequel Corp. | Credit facility debt | Carrying Amount | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	1,253,110	812,903
Cequel Corp. | Credit facility debt | Estimated Fair Value | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	1,261,838	815,000
Cequel Corp. | Senior notes and debentures | Carrying Amount | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	2,762,543	3,176,131
Cequel Corp. | Senior notes and debentures | Estimated Fair Value | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	3,036,850	3,517,275
Cequel Corp. | Notes payable | Carrying Amount | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	3,083	0
Cequel Corp. | Notes payable | Estimated Fair Value | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	3,083	0
Cequel Corp. | Senior secured notes | Carrying Amount | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	2,569,559	2,566,802
Cequel Corp. | Senior secured notes | Estimated Fair Value | Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	$ 2,745,750	$ 2,689,750

INCOME TAXES (Details)

INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 134,688	$ 118,230		$ 429,664	$ 101,332
Effective tax rate (percent)	43.00%			37.00%
Income tax expense related to share-based compensation cost	$ 6,002			$ 16,373
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred income tax charge				(458,608)	(105,468)
Unrealized excess tax benefits recognized with the adoption of ASU 2016-09				308,231
State and Local Jurisdiction
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred income tax charge		$ 2,431			$ 18,542
Domestic Tax Authority
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net operating loss carryforward	$ 2,674,000			$ 2,674,000
Cablevision Systems Corp.
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred income tax charge			$ 153,660

SHARE BASED COMPENSATION - Narr

SHARE BASED COMPENSATION - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee and non-employee share-based compensation expense	$ 15,005	$ 40,932
Employee share-based compensation expense	14,448	39,150
Non-employee share-based compensation expense	$ 557	$ 1,782
Carry Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards authorized (in shares)	259,442,785	259,442,785
Repurchase period following termination		60 days
Repurchase period following fourth anniversary		60 days
Carry unit plan, written promissory note period		3 years
Weighted average fair value (in dollars per unit)	$ 3.49	$ 3.49	$ 1.76
Carry Unit Awards | Second Anniversary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage		50.00%
Carry Unit Awards | Third Anniversary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage		25.00%
Carry Unit Awards | Fourth Anniversary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage		25.00%
Employee | Carry Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		215,295,834
Affiliates | Carry Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		11,300,000

SHARE BASED COMPENSATION -Carry

SHARE BASED COMPENSATION -Carrying Unit Award Activity (Details)	9 Months Ended
	Sep. 30, 2017$ / sharesshares
Time Vesting Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares)	192,800,000
Granted (in shares)	28,025,000
Forfeited (in shares)	(4,229,166)
Ending balance (in shares)	216,595,834
Awards vested at September 30, 2017	0
Performance Based Vesting Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares)	10,000,000
Granted (in shares)	0
Forfeited (in shares)	0
Ending balance (in shares)	10,000,000
Awards vested at September 30, 2017	0
Carry Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Balance at beginning of period, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0.37
Granted weighted average grant date fair value (in dollars per share) | $ / shares	3.14
Forfeited weighted average grant date fair value (in dollars per share) | $ / shares	0.37
Balance at End of period, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0.71

AFFILIATE AND RELATED PARTY T63

AFFILIATE AND RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017	Dec. 31, 2016	Jul. 06, 2016
Related Party Transaction [Line Items]
Document Period End Date			Sep. 30, 2017
Investment in affiliates and related parties	$ 1,694		$ 1,694			$ 5,606
Equity in net income (loss) from investment in related party			(5,697)	$ (400)
Prepayment to affiliate included in other assets	109,652		109,652			88,151
Transfer of goodwill			(23,101)
Related party expense	28,542	$ 56,595	679,037	66,900
Capital expenditures			4,800	2,866
Cash distributions	839,700		839,700	0
Affiliates
Related Party Transaction [Line Items]
Prepayment to affiliate included in other assets	11,296		11,296
Prepaid Expense, Noncurrent					$ 2,570
Related party note						1,750,000
Due to related parties and affiliates						$ 102,557
Other Operating Expenses | Affiliates
Related Party Transaction [Line Items]
Related party expense	20,030		48,997
Fees for Executive Services | Affiliates
Related Party Transaction [Line Items]
Related party transaction, annual fee	30,000		30,000
Related party expense	7,500	$ 8,056	22,500	$ 13,056
Installation and Construction | Affiliates
Related Party Transaction [Line Items]
Capital expenditures	68,636		85,320
Fiber To The Home Network [Member]
Related Party Transaction [Line Items]
Payments of advances for capital expenditure			41,036
Equipment and Software Development Costs | Affiliates
Related Party Transaction [Line Items]
Capital expenditures	$ 3,549		$ 12,914
I24News and Altice NV 24/7
Related Party Transaction [Line Items]
Ownership percentage	25.00%		25.00%
Equity in net income (loss) from investment in related party	$ 541		$ 3,126
Newsday
Related Party Transaction [Line Items]
Ownership percentage of noncontrolling interest							75.00%
Ownership percentage	25.00%		25.00%
Equity in net income (loss) from investment in related party	$ 1,034		$ 2,571
CSC Holdings Revolving Credit Facility | Revolving Credit Facility
Related Party Transaction [Line Items]
Proceeds from credit facility debt	500,000		1,350,000
Other Operating Expense | Transition Services | Affiliates
Related Party Transaction [Line Items]
Other operating expenses, charges for related party services	802		1,766
Transition services credit	$ 76		$ 917
Altice Technical Service B.V.
Related Party Transaction [Line Items]
Ownership percentage of noncontrolling interest	70.00%		70.00%

AFFILIATE AND RELATED PARTY T64

AFFILIATE AND RELATED PARTY TRANSACTIONS - Revenue and Related Charges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Related Party Transactions [Abstract]
Revenue	$ 986	$ 720	$ 1,380	$ 720
Operating expenses:
Programming and other direct costs	(1,196)	(642)	(3,026)	(642)
Other operating expenses, net	(28,332)	(8,056)	(73,263)	(13,056)
Operating expenses, net	(29,528)	(8,698)	(76,289)	(13,698)
Interest expense	0	(48,617)	(90,405)	(53,922)
Loss on extinguishment of debt and write-off of deferred financing costs	0	0	(513,723)	0
Net charges	(28,542)	(56,595)	(679,037)	(66,900)
Capital Expenditures	$ 72,185	$ 0	$ 98,234	$ 0

AFFILIATE AND RELATED PARTY T65

AFFILIATE AND RELATED PARTY TRANSACTIONS - Amounts Due From and Due to Related Parties (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Document Period End Date	Sep. 30, 2017
Affiliates
Related Party Transaction [Line Items]
Due from related parties and affiliates	$ 21,153		$ 22,182
Due to related parties and affiliates	29,002		127,363
Affiliates | Altice US Finance S.A.
Related Party Transaction [Line Items]
Due from related parties and affiliates	12,951		12,951
Affiliates | Newsday
Related Party Transaction [Line Items]
Due from related parties and affiliates	4,177		6,114
Due to related parties and affiliates	103		275
Affiliates | Altice Management Americas
Related Party Transaction [Line Items]
Due from related parties and affiliates	615		3,117
Affiliates | Altice Technical Services
Related Party Transaction [Line Items]
Due to related parties and affiliates		$ 22,541	0
Affiliates | I24
Related Party Transaction [Line Items]
Due from related parties and affiliates	3,373		0
Affiliates | Other Related Party
Related Party Transaction [Line Items]
Due from related parties and affiliates	37		0
Due to related parties and affiliates	6,358		3,350
Affiliates | CVC 3BV
Related Party Transaction [Line Items]
Due to related parties and affiliates	0		71,655
Affiliates | Neptune Holdings US LP
Related Party Transaction [Line Items]
Due to related parties and affiliates	0		7,962
Affiliates | Altice Management International
Related Party Transaction [Line Items]
Due to related parties and affiliates	$ 0		$ 44,121

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Estimated litigation liability		$ 5,200
Increase in estimated litigation liability	$ 800

SEGMENT INFORMATION - Narrative

SEGMENT INFORMATION - Narrative (Details)	9 Months Ended
	Sep. 30, 2017segment
Segment Reporting [Abstract]
Number of reportable business segments	2

SEGMENT INFORMATION - Reconcili

SEGMENT INFORMATION - Reconciliation of Adjusted EBITDA to Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating Income (Loss) from Continuing Operations Before Income Taxes [Abstract]
Operating income	$ 134,864	$ 142,779	$ 639,880	$ 242,442
Share-based compensation expense	15,005	1,670	40,932	1,670
Restructuring and other expense	53,448	47,816	142,765	155,086
Depreciation and amortization (including impairments)	823,265	670,929	2,138,776	1,085,929
Adjusted EBITDA	1,026,582	863,194	2,962,353	1,485,127
Cablevision Systems Corp.
Operating Income (Loss) from Continuing Operations Before Income Taxes [Abstract]
Operating income	11,185	39,947	244,667	(32,133)
Share-based compensation expense	11,555	1,091	28,597	1,091
Restructuring and other expense	35,364	45,176	105,182	143,891
Depreciation and amortization (including impairments)	656,102	481,497	1,641,477	526,057
Adjusted EBITDA	714,206	567,711	2,019,923	638,906
Cequel Corp.
Operating Income (Loss) from Continuing Operations Before Income Taxes [Abstract]
Operating income	123,679	102,832	395,213	274,575
Share-based compensation expense	3,450	579	12,335	579
Restructuring and other expense	18,084	2,640	37,583	11,195
Depreciation and amortization (including impairments)	167,163	189,432	497,299	559,872
Adjusted EBITDA	$ 312,376	$ 295,483	$ 942,430	$ 846,221

SEGMENT INFORMATION - Reconci69

SEGMENT INFORMATION - Reconciliation of Reportable Segments to Consolidated Balances (Details) - USD ($) $ in Thousands	Mar. 15, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating Income (Loss) from Continuing Operations Before Income Taxes [Abstract]
Operating income for reportable segments		$ 134,864	$ 142,779	$ 639,880	$ 242,442
Items excluded from operating income:
Interest expense		(379,064)	(446,242)	(1,232,730)	(1,015,866)
Interest income		961	404	1,373	12,787
Gain (loss) on investments, net		(18,900)	24,833	169,888	83,467
Gain (loss) on derivative contracts, net		(16,763)	773	(154,270)	(26,572)
Gain (loss) on interest rate swap contracts		1,051	(15,861)	12,539	24,380
Loss on extinguishment of debt and write-off of deferred financing costs	$ (18,976)	(38,858)	0	(600,240)	(19,948)
Other income (expense), net		(65)	2,531	832	2,548
Loss before income taxes		$ (316,774)	$ (290,783)	$ (1,162,728)	$ (696,762)

SEGMENT INFORMATION - Summary o

SEGMENT INFORMATION - Summary of Revenue by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue from External Customer [Line Items]
Revenues	$ 2,327,175	$ 2,260,221	$ 6,961,192	$ 3,711,311
Pay TV
Revenue from External Customer [Line Items]
Revenues	1,054,392	1,051,995	3,185,610	1,700,286
Broadband
Revenue from External Customer [Line Items]
Revenues	646,094	578,605	1,887,279	1,019,069
Telephony
Revenue from External Customer [Line Items]
Revenues	204,753	216,186	624,077	315,137
Business services and wholesale
Revenue from External Customer [Line Items]
Revenues	324,760	309,366	968,291	504,963
Advertising
Revenue from External Customer [Line Items]
Revenues	84,539	88,759	257,255	138,934
Other
Revenue from External Customer [Line Items]
Revenues	12,637	15,310	38,680	32,922
Operating Segments | Cablevision Systems Corp.
Revenue from External Customer [Line Items]
Revenues	1,664,319	1,614,699	4,973,542	1,798,559
Operating Segments | Cablevision Systems Corp. | Pay TV
Revenue from External Customer [Line Items]
Revenues	782,214	772,886	2,356,230	859,932
Operating Segments | Cablevision Systems Corp. | Broadband
Revenue from External Customer [Line Items]
Revenues	404,153	366,166	1,177,731	406,057
Operating Segments | Cablevision Systems Corp. | Telephony
Revenue from External Customer [Line Items]
Revenues	172,904	178,000	524,696	198,282
Operating Segments | Cablevision Systems Corp. | Business services and wholesale
Revenue from External Customer [Line Items]
Revenues	230,274	220,352	690,168	244,685
Operating Segments | Cablevision Systems Corp. | Advertising
Revenue from External Customer [Line Items]
Revenues	67,563	67,815	203,351	75,458
Operating Segments | Cablevision Systems Corp. | Other
Revenue from External Customer [Line Items]
Revenues	7,211	9,480	21,366	14,145
Operating Segments | Cequel Corp.
Revenue from External Customer [Line Items]
Revenues	663,336	645,522	1,988,130	1,912,752
Operating Segments | Cequel Corp. | Pay TV
Revenue from External Customer [Line Items]
Revenues	272,178	279,109	829,380	840,354
Operating Segments | Cequel Corp. | Broadband
Revenue from External Customer [Line Items]
Revenues	241,941	212,439	709,548	613,012
Operating Segments | Cequel Corp. | Telephony
Revenue from External Customer [Line Items]
Revenues	31,849	38,186	99,381	116,855
Operating Segments | Cequel Corp. | Business services and wholesale
Revenue from External Customer [Line Items]
Revenues	94,486	89,014	278,123	260,278
Operating Segments | Cequel Corp. | Advertising
Revenue from External Customer [Line Items]
Revenues	17,456	20,944	54,384	63,476
Operating Segments | Cequel Corp. | Other
Revenue from External Customer [Line Items]
Revenues	5,426	$ 5,830	17,314	$ 18,777
Eliminations
Revenue from External Customer [Line Items]
Revenues	(480)		(480)
Eliminations | Pay TV
Revenue from External Customer [Line Items]
Revenues	0		0
Eliminations | Broadband
Revenue from External Customer [Line Items]
Revenues	0		0
Eliminations | Telephony
Revenue from External Customer [Line Items]
Revenues	0		0
Eliminations | Business services and wholesale
Revenue from External Customer [Line Items]
Revenues	0		0
Eliminations | Advertising
Revenue from External Customer [Line Items]
Revenues	(480)		(480)
Eliminations | Other
Revenue from External Customer [Line Items]
Revenues	$ 0		$ 0

SEGMENT INFORMATION - Capital E

SEGMENT INFORMATION - Capital Expenditures by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information, Capital Expenditures [Abstract]
Capital expenditures	$ 303,636	$ 248,156	$ 763,298	$ 377,726
Cablevision Systems Corp.
Segment Reporting Information, Capital Expenditures [Abstract]
Capital expenditures	228,594	150,815	550,231	150,965
Cequel Corp.
Segment Reporting Information, Capital Expenditures [Abstract]
Capital expenditures	$ 75,042	$ 97,341	$ 213,067	$ 226,761