Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2018	Aug. 03, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	Altice USA, Inc.
Entity Central Index Key	0001702780
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Entity Common Stock, Shares Outstanding		737,068,966

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 381,140	$ 329,848
Restricted cash	253	252
Accounts receivable, trade (less allowance for doubtful accounts of $12,737 and $13,420)	382,207	370,765
Prepaid expenses and other current assets	166,963	130,425
Amounts due from affiliates	17,612	19,764
Derivative contracts	9,992	52,545
Total current assets	958,167	903,599
Property, plant and equipment, net of accumulated depreciation of $3,393,628 and $2,599,579	5,694,812	6,023,826
Investment securities pledged as collateral	1,409,361	1,720,357
Derivative contracts	101,007	0
Other assets	117,696	57,904
Amortizable intangible assets, net of accumulated amortization	4,608,585	5,066,454
Indefinite-lived cable television franchises	13,020,081	13,020,081
Goodwill	8,004,808	8,019,861
Total assets	33,914,517	34,812,082
Current Liabilities:
Accounts payable	801,448	795,128
Interest	398,024	397,422
Employee related costs	122,404	147,727
Other accrued expenses	317,270	411,988
Amounts due to affiliates	24,392	10,998
Deferred revenue	121,913	111,197
Liabilities under derivative contracts	9,623	52,545
Credit facility debt	53,900	42,650
Senior notes and debentures	1,035,212	507,744
Capital lease obligations	5,561	9,539
Notes payable	67,109	33,424
Total current liabilities	2,956,856	2,520,362
Defined benefit plan obligations	97,518	103,163
Other liabilities	141,939	144,289
Deferred tax liability	4,716,681	4,769,286
Liabilities under derivative contracts	123,470	187,406
Collateralized indebtedness	1,392,648	1,349,474
Credit facility debt	5,625,732	4,600,873
Senior notes and debentures	14,805,268	15,352,688
Capital lease obligations	11,639	12,441
Notes payable	5,408	32,478
Deficit investment in affiliates	0	3,579
Total liabilities	29,877,159	29,076,039
Commitments and contingencies
Redeemable equity	170,165	231,290
Stockholders' Equity:
Preferred Stock, $.01 par value, 100,000,000 shares authorized, no shares issued and outstanding	0	0
Paid-in capital	3,856,682	4,665,229
Retained earnings	6,191	840,636
Total stockholders' equity before accumulated other comprehensive Income and non-controlling interest	3,870,244	5,513,236
Accumulated other comprehensive loss	(10,438)	(10,022)
Total stockholders' equity	3,859,806	5,503,214
Noncontrolling interest	7,387	1,539
Total stockholders' equity	3,867,193	5,504,753
Total liabilities and stockholders' equity	33,914,517	34,812,082
Common Class A
Stockholders' Equity:
Common stock	4,928	2,470
Common Class B [Member]
Stockholders' Equity:
Common stock	2,443	4,901
Common Class C
Stockholders' Equity:
Common stock	0	0
Customer relationships
Current Assets:
Amortizable intangible assets, net of accumulated amortization	4,173,805	4,561,863
Trade names
Current Assets:
Amortizable intangible assets, net of accumulated amortization	412,585	478,509
Amortizable intangible assets
Current Assets:
Amortizable intangible assets, net of accumulated amortization	$ 22,195	$ 26,082

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current Assets:
Accounts receivable, trade allowance for doubtful accounts	$ 12,737	$ 13,420
Property, plant and equipment, accumulated depreciation	3,393,628	2,599,579
Amortizable intangible assets, accumulated amortization	$ 2,466,442	$ 2,008,573
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 Class A
Stockholders' Equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	4,000,000,000	4,000,000,000
Common stock, shares issued (in shares)	492,812,285	246,982,292
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	492,812,285	246,982,292
Common Class B [Member]
Stockholders' Equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	490,086,674
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	247,684,443	490,086,674
Common Class C
Stockholders' Equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	4,000,000,000	4,000,000,000
Common stock, shares issued (in shares)	0	0
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	0	0
Customer relationships
Current Assets:
Amortizable intangible assets, accumulated amortization	$ 1,797,079	$ 1,409,021
Trade names
Current Assets:
Amortizable intangible assets, accumulated amortization	654,498	588,574
Amortizable intangible assets
Current Assets:
Amortizable intangible assets, accumulated amortization	$ 14,865	$ 10,978

CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Revenue (including revenue from affiliates of $727, $253, $852 and $394, respectively) (See Note 14)	$ 2,364,153	$ 2,322,362	$ 4,693,867	$ 4,624,621
Operating expenses:
Programming and other direct costs (including charges from affiliates of $3,865, $1,095, $5,019 and $1,830, respectively) (See Note 14)	795,127	758,694	1,582,488	1,517,046
Other operating expenses (including charges from affiliates of $6,255, $8,666, $14,249 and $15,964, respectively) (See Note 14)	575,749	591,222	1,158,772	1,199,366
Restructuring and other expense	9,691	12,388	13,278	89,317
Depreciation and amortization (including impairments)	648,527	706,790	1,291,232	1,315,514
Total operating expenses	2,029,094	2,069,094	4,045,770	4,121,243
Operating income	335,059	253,268	648,097	503,378
Other income (expense):
Interest expense (including $42,817 and $90,405 related to affiliates and related parties in 2017) (See Note 9)	(390,543)	(420,370)	(767,801)	(853,664)
Interest income	5,313	180	8,416	412
Gain (loss) on investments and sale of affiliate interests, net	(45,113)	57,130	(293,715)	188,788
Gain (loss) on investments and sale of affiliate interests, net	(58,420)		(310,996)
Gain (loss) on derivative contracts, net	42,159	(66,463)	210,511	(137,507)
Gain (loss) on interest rate swap contracts	(12,929)	9,146	(44,851)	11,488
Loss on extinguishment of debt and write-off of deferred financing costs (including $513,723 related to affiliates and related parties in 2017) (See Note 10)	(36,911)	(561,382)	(41,616)	(561,382)
Other expense, net	(629)	(3,935)	(12,287)	(6,035)
Total other income (expense)	(438,653)	(985,694)	(941,343)	(1,357,900)
Loss before income taxes	(103,594)	(732,426)	(293,246)	(854,522)
Income tax benefit	5,590	252,487	66,293	298,395
Net loss	(98,004)	(479,939)	(226,953)	(556,127)
Net loss (income) attributable to noncontrolling interests			147	(602)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	(149)	365	(147)	602
Net loss attributable to Altice USA, Inc. stockholders	$ (97,855)	$ (480,304)	$ (226,806)	$ (556,729)
Basic and diluted net loss per share (in dollars per share)	$ (0.13)	$ (0.73)	$ (0.31)	$ (0.85)
Basic and diluted weighted average common shares (in shares)	737,069	659,145	737,069	654,362

CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Revenue from affiliates	$ 727	$ 253	$ 852	$ 394
Programming and other direct costs from affiliates	3,865	1,095	5,019	1,830
Other operating expense from affiliates	6,255	8,666	14,249	15,964
Interest expense to related parties and affiliates	0	42,817	0	90,405
Gain (Loss) on Extinguishment of Debt	(36,911)	(561,382)	(41,616)	(561,382)
Related Party Transaction, Loss on Extinguishment of Debt of Deferred Financing Costs	$ 0	$ 513,723	$ 0	$ 513,723

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net loss	$ (98,004)	$ (479,939)	$ (226,953)	$ (556,127)
Defined benefit pension plans:
Unrecognized actuarial gain (loss)	(359)	(4,333)	4,192	(4,333)
Applicable income taxes	97	1,733	(1,131)	1,733
Unrecognized gain (loss) arising during period, net of income taxes	(262)	(2,600)	3,061	(2,600)
Settlement loss included in other expense, net	258	389	864	389
Applicable income taxes	(70)	(156)	(234)	(156)
Settlement loss included in other expense, net, net of income taxes	188	233	630	233
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	914	0	914	0
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(338)	0	(338)	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	576	0	576	0
Other comprehensive gain (loss)	502	(4,284)	4,267	(4,284)
Comprehensive loss	(97,502)	(484,223)	(222,686)	(560,411)
Comprehensive loss (income) attributable to noncontrolling interests	149	(365)	147	(602)
Comprehensive loss attributable to Altice USA, Inc. stockholders	(97,353)	(484,588)	(222,539)	(561,013)
Customer Relationships [Member]
Defined benefit pension plans:
Settlement loss included in other expense, net	0	(3,195)	0	(3,195)
Applicable income taxes	0	1,278	0	1,278
Settlement loss included in other expense, net, net of income taxes	$ 0	$ (1,917)	$ 0	$ (1,917)

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Settlement loss related to pension plan	$ 864	$ 389

CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - 6 months ended Jun. 30, 2018 - USD ($) shares in Thousands, $ in Thousands	Total	Total Stockholders' Equity	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (loss)	Non-controlling Interest	Common Class A Common Stock	Common Class B [Member] Common Stock	ATS Acquisition	ATS Acquisition Total Stockholders' Equity	ATS Acquisition Paid-in Capital	ATS Acquisition Retained Earnings
Dividends	$ 1,499,935	$ 1,499,935	$ 963,711	$ (536,224)
Conversion of Stock, Shares Converted	0						2,458	(2,458)
Acquisitionofi24	$ 15,049	15,049	(61,049)	(73,578)	$ (2,520)
Beginning balance (As Reported) at Dec. 31, 2017	5,495,840	5,494,301	4,642,128	854,824	(10,022)	$ 1,539	$ 2,470	$ 4,901
Beginning balance (Restatement Adjustment)									$ (3,753)	$ (3,753)	$ 23,101	$ (26,854)
Beginning balance (Restatement Adjustment, Impact of ASC 606)	12,666	12,666		12,666
Beginning balance at Dec. 31, 2017	5,504,753	5,503,214	4,665,229	840,636	(10,022)	1,539	2,470	4,901
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss attributable to stockholders	(226,806)	(226,806)		(226,806)
Net loss attributable to noncontrolling interests	(147)					(147)
Proceeds from (Payments to) Noncontrolling Interests	5,995					5,995
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss) Due to Settlements, Net of Tax	3,691	3,691			3,691
Pension liability adjustments, net of income taxes	4,267
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	576	576			576
Share-based compensation expense	33,849	33,849	33,849
Redeemable equity vested	(50,396)	(50,396)	(50,396)
Other changes to equity	(859)	(859)	(859)	0
Adoption of ASU No. 2018-02				2,163	(2,163)
Ending balance at Jun. 30, 2018	3,867,193	3,859,806	3,856,682	$ 6,191	$ (10,438)	$ 7,387	$ 4,928	$ 2,443
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redeemable Equity Vested	$ (111,521)	$ (111,521)	$ (111,521)

CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net loss	$ (226,953)	$ (556,127)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization (including impairments)	1,291,232	1,315,514
Equity in net loss of affiliates	10,849	4,122
Loss (gain) on investments and sale of affiliate interests, net	293,715	(188,788)
Loss (gain) on derivative contracts, net	(210,511)	137,507
Loss on extinguishment of debt and write-off of deferred financing costs	41,616	561,382
Amortization of deferred financing costs and discounts (premiums) on indebtedness	36,971	7,214
Settlement loss related to pension plan	864	389
Share-based compensation expense	33,849	25,927
Deferred income taxes	(80,280)	(311,809)
Provision for doubtful accounts	29,462	32,918
Change in assets and liabilities, net of effects of acquisitions and dispositions:
Accounts receivable, trade	(37,224)	(8,006)
Other receivables	(5,926)	7,949
Prepaid expenses and other assets	(31,951)	(2,015)
Amounts due from and due to affiliates	8,573	(28,005)
Accounts payable	49,449	67,482
Accrued liabilities	(110,227)	(256,661)
Deferred revenue	20,536	10,614
Liabilities related to interest rate swap contracts	45,199	(8,500)
Net cash provided by operating activities	1,159,243	811,107
Cash flows from investing activities:
Payments for acquisitions, net of cash acquired	(5,308)	(43,608)
Sale of affiliate interests	(3,537)	0
Capital expenditures	(498,297)	(463,590)
Proceeds related to sale of equipment, including costs of disposal	6,858	1,536
Increase in other investments	(2,500)	(3,550)
Additions to other intangible assets	0	(744)
Net cash used in investing activities	(502,784)	(509,956)
Cash flows from financing activities:
Proceeds from credit facility debt, net of discounts	1,642,500	4,977,425
Repayment of credit facility debt	(621,325)	(3,573,750)
Issuance of senior notes and debentures	2,050,000	0
Proceeds from collateralized indebtedness, net	337,124	490,816
Net Cash Receipt Payment on Collateralized Indebtedness Settlement	(337,124)	(483,081)
Repayment of collateralized indebtedness and related derivative contracts, net	0
Payments of Dividends	(1,499,935)	(919,317)
Redemption of senior notes, including premiums and fees	(2,123,756)	(979,280)
Repayment of notes payable	(446)	0
Principal payments on capital lease obligations	(6,019)	(8,061)
Additions to deferred financing costs	(22,277)	(7,352)
Other	(859)	0
Net cash provided by (used in) financing activities	(605,062)	(102,309)
Payment for Contingent Consideration Liability, Financing Activities	(28,940)	0
Proceeds from Partnership Contribution	5,995
Proceeds from Contributed Capital		51,135
Proceeds from Issuance Initial Public Offering	0	349,156
Net increase in cash and cash equivalents	51,397	198,842
Cash, cash equivalents and restricted cash at beginning of year	330,100	503,093
Cash, cash equivalents and restricted cash at end of period	381,393	701,935
Effect of Exchange Rate on Cash and Cash Equivalents	(104)	0
Cash and Cash Equivalents, Period Increase (Decrease)	51,293	$ 198,842
Non-controlling Interest
Cash flows from financing activities:
Proceeds from Partnership Contribution	$ 5,995

DESCRIPTION OF BUSINESS AND RELATED MATTERS	6 Months Ended
DESCRIPTION OF BUSINESS AND RELATED MATTERS	Jun. 30, 2018
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. Prior to the Altice N.V. distribution discussed below, Altice USA was majority‑owned by Altice N.V., a public company with limited liability (naamloze vennootshcap) under Dutch law. Since the completion of the Altice N.V. distribution discussed below, the Company is no longer majority-owned by Altice N.V. The Company provides broadband communications and video services in the United States. It delivers broadband, pay television, telephony services, proprietary content and advertising services to residential and business customers. Altice N.V., through a subsidiary, acquired Cequel Corporation ("Cequel" or "Suddenlink") on December 21, 2015 (the "Cequel Acquisition") and Cequel was contributed to Altice USA on June 9, 2016. Altice USA acquired Cablevision Systems Corporation ("Cablevision" or "Optimum") on June 21, 2016 (the "Cablevision Acquisition"). 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. The accompanying condensed combined consolidated financial statements ("condensed consolidated financial statements") include the accounts of the Company and all subsidiaries in which the Company has a controlling interest and gives effect to the ATS Acquisition and the i24 Acquisition discussed below on a combined basis. All significant inter-company accounts and transactions have been eliminated in consolidation. The accompanying condensed consolidated operating results for the three and six months ended June 30, 2017 reflect the retrospective adoption of Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers and ASU No. 2017‑07 Compensation-Retirement Benefits (Topic 715). See Note 3 for further details of the impact on the Company's historical financial statements. In June 2017, the Company completed its initial public offering ("IPO") of 71,724,139 shares of its Class A 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". Acquisition of Altice Technical Services US Corp ATS was formed in 2017 to provide network construction and maintenance services and commercial and residential installations, disconnections, and maintenance. 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. A substantial portion of the Cequel segment technical workforce became employees of ATS in December 2017. In January 2018, the Company acquired 70% of the equity interests in Altice Technical Services US Corp. ("ATS") for $1.00 (the "ATS Acquisition") and the Company became the owner of 100% of the equity interests in ATS in March 2018. ATS was previously owned by Altice N.V. and a member of ATS's management through a holding company. As the acquisition was a combination of businesses under common control, the Company combined the results of operations and related assets and liabilities of ATS for all periods since its formation. See Note 3 for the impact of the ATS Acquisition on the Company's condensed consolidated balance sheet as of December 31, 2017 and on the Company's statement of operations for the three and six months ended June 30, 2017. Acquisition of i24NEWS In April 2018, Altice N.V. transferred its ownership of i24 US and i24 Europe ("i24NEWS"), Altice N.V.'s 24/7 international news and current affairs channels to the Company for minimal consideration (the "i24 Acquisition"). As the acquisition was a combination of businesses under common control, the Company combined the results of operations and related assets and liabilities of i24NEWS as of April 1, 2018. Operating results for periods prior to April 1, 2018 and the balance sheet as of December 31, 2017 have not been revised to reflect the i24 Acquisition as the impact was deemed immaterial. Altice N.V. Distribution On June 8, 2018, Altice N.V. distributed substantially all of its equity interest in the Company through a distribution in kind to holders of Altice N.V.'s common shares A and common shares B (the “Distribution”). The Distribution took place by way of a special distribution in kind by Altice N.V. of its 67.2% interest in the Company to Altice N.V. shareholders. Each shareholder of Altice N.V. on May 23, 2018, the Distribution record date, received 0.4163 shares of the Company's common stock for every share held by such shareholder in Altice N.V. Between May 24, 2018 and June 4, 2018, each Altice N.V. shareholder was given the opportunity to elect the percentage of shares of the Company's Class A common stock and shares of the Company's Class B common stock such shareholder would receive in the Distribution, whereby the number of shares of the Company's Class B common stock to be distributed was subject to a cap of 50% of the total shares of the Company's common stock being distributed (the “Class B Cap”). Because the Class B Cap had been exceeded, the shares of the Company's Class B common stock delivered to Altice N.V.’s shareholders of record who elected to receive them were subject to proration, and such shareholders received shares of the Company's Class A common stock. Immediately following the Distribution, there were 489,384,523 shares of Altice USA Class A common stock and 247,684,443 shares of Altice USA Class B common stock outstanding. Prior to Altice N.V.'s announcement of the Distribution, the Board of Directors of Altice USA, acting through its independent directors, approved the payment of a $2.035 dividend to all shareholders of record on May 22, 2018. The payment of the dividend, aggregating $1,499,935, was made on June 6, 2018, and was funded with cash at CSC Holdings LLC, a wholly-owned subsidiary of Cablevision, from financings completed in January 2018 and cash generated from operations at Cequel. In connection with the payment of the dividend, the Company recorded a decrease in retained earnings of $536,224, representing the cumulative earnings through the payment date, and a decrease in paid in capital of $963,711. In addition, the Board of Directors of Altice USA also authorized a share repurchase program of $2.0 billion, effective June 8, 2018. In connection with the Distribution, the Management Advisory and Consulting Services Agreement with Altice N.V. which provided certain consulting, advisory and other services was terminated. Compensation under the terms of the agreement was an annual fee of $30,000 paid by the Company.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	6 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Jun. 30, 2018
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The accompanying unaudited condensed 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 condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2017 and the Company's financial statements and notes thereto included on Form 8-K filed on May 21, 2018. 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, 2018. 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 Pronouncements In February 2018, the FASB issued ASU No. 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220) Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The primary provision of ASU No. 2018-02 allows for the reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. ASU No. 2018-02 also requires certain disclosures about stranded tax effects. ASU No. 2018‑02 is effective for the Company on January 1, 2019, with early adoption permitted and will be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act is recognized. The Company elected to adopt ASU No. 2018-02 during the first quarter of 2018. The adoption resulted in the reclassification of stranded tax amounts of $2,163 associated with net unrecognized losses from the Company's pension plans from accumulated other comprehensive loss to retained earnings. 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 was adopted by the Company on January 1, 2018 and it had no impact to the Company's condensed consolidated financial statements. 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 was adopted by the Company on January 1, 2018 and was applied retrospectively. As a result of the adoption, the Company reclassified the non-service cost components of the Company's pension expense for the three and six months ended March 31, 2017 from other operating expenses to other income (expense), net. The Company elected to apply the practical expedient which allowed it to reclassify amounts disclosed previously in the benefits plan note as the basis for applying retrospective presentation for comparative periods, as the Company determined it was impracticable to disaggregate the cost components for amounts capitalized and amortized in those periods. See Note 3 for information on the impact of the adoption of ASU No. 2017-07. 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 Company adopted the new guidance on January 1, 2018 and it had no impact to the Company's condensed 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 was adopted by the Company on January 1, 2018 and it had no impact to the Company's condensed consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers ("ASC 606"), 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. ASC 606 replaced most existing revenue recognition guidance in GAAP and allowed the use of either the retrospective or cumulative effect transition method. 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. The amendments in this update affected the guidance in ASC 606. ASC 606 was adopted by the Company on January 1, 2018 on a full retrospective basis, which required the Company to reflect the impact of the updated guidance for all periods presented. The adoption of ASC 606 did not have a material impact on the Company’s financial position or results of operations. See Note 3 for information on the impact of the adoption of ASC 606. 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 Company adopted the new guidance on January 1, 2018 and it had no impact to the Company's condensed consolidated financial statements. Recently Issued But Not Yet Adopted Accounting Pronouncements 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 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. Although, the Company has not yet completed the evaluation of the effect that ASU No. 2016-02 will have on its consolidated financial statements, upon adoption, the Company expects to recognize a right of use asset and liability related to substantially all operating lease arrangements on the Company's consolidated balance sheet. Reclassifications Certain reclassifications have been made to the 2017 financial statements to conform to the 2018 presentation.

CHANGE IN ACCOUNTING POLICIES AND ATS ACQUISITION

6 Months Ended

Jun. 30, 2018

Accounting Changes and Error Corrections [Abstract]

CHANGE IN ACCOUNTING POLICIES AND ATS ACQUISITION

Adoption of ASC 606 - Revenue from Contracts with Customers

On January 1, 2018, the Company adopted the guidance pursuant to ASC 606. The Company elected to apply the guidance on a full retrospective basis, which required the Company to reflect the impact of the updated guidance for all periods presented. The adoption of the guidance resulted in the deferral of certain installation revenue, the deferral of certain commission expenses, and a reduction of revenue due to the reclassification of certain third party giveaways and incentives from operating expense. Additionally, the Company made changes in the composition of revenue resulting from the allocation of value related to bundled services sold to residential customers at a discount.

Installation Services Revenue

Pursuant to ASC 606, the Company's installation services revenue is deferred and recognized over the benefit period. For residential customers, the benefit period is less than one year. For business and wholesale customers, the benefit period is the contract term. Prior to the adoption of ASC 606, the Company recognized installation services revenue for residential and small and medium-sized business ("SMB") customers when installations were completed. As a result of the deferral of installation services revenue for residential and SMB customers, the Company recognized contract liabilities of $6,978 and recorded a cumulative effect adjustment of $5,093 (net of tax of $1,885) to retained earnings. The accounting for installation services revenue related to business and wholesale customers has not changed.

Commission Expenses

Pursuant to ASC 606, the Company defers commission expenses related to obtaining a contract with a customer when the expected period of benefit is greater than one year and amortizes these costs over the average contract term. For commission expenses related to customer contracts with a term of one year or less, the Company is utilizing the practical expedient and is recognizing the costs when incurred. Prior to the adoption of ASC 606, the Company recognized commission expenses related to the sale of its services when incurred. As a result of the change in the timing of recognition of these commission expenses, the Company recognized contract assets of $24,329 and recorded a cumulative effect adjustment of $17,759 (net of tax of $6,570) to retained earnings.

Third Party Product Giveaways and Incentives

When the Company acts as the agent in providing certain product giveaways or incentives, revenue is recorded net of the costs of the giveaways and incentives. For the three and six months ended June 30, 2017, costs of $5,979 and $9,396, respectively for the giveaways and incentives recorded in other operating expense have been reclassified to revenue.

Bundled Services

The Company provides bundled services at a discounted rate to its customers. Under ASC 606, revenue should be allocated to separate performance obligations within a bundled offering based on the relative stand-alone selling price of each service within the bundle. In connection with the adoption of ASC 606, the Company revised the amounts allocated to each performance obligation within its bundled offerings which reduced previously reported revenue for telephony services and increased previously reported revenue allocated to pay television and broadband services.

Adoption of ASU No. 2017-07 - Compensation-Retirement Benefits (Topic 715)

On January 1, 2018, the Company adopted the guidance pursuant to ASU No. 2017‑07. ASU No. 2017‑07 requires that an employer disaggregate the service cost component from the other components of net benefit cost. In connection with the adoption of ASU No. 2017‑07, the Company retroactively reclassified certain pension costs from other operating expenses to other income (expense), net. The adoption of ASU No. 2017-07 had no impact on the Company's condensed consolidated balance sheet.

Acquisition of ATS

As discussed in Note 1, the Company completed the ATS Acquisition in the first quarter of 2018. ATS was previously owned by Altice N.V. and a member of ATS's management through a holding company. As the acquisition is a combination of businesses under common control, the Company combined the results of operations and related assets and liabilities of ATS for all periods since the formation of ATS, including goodwill of $23,101, representing the amount previously transferred to ATS.

The following table summarizes the impact of adopting ASC 606 and the impact of the ATS Acquisition on the Company's condensed consolidated balance sheet:



	December 31, 2017
	As Reported		Impact of ASC 606		Impact of ATS Acquisition			As Adjusted
Cash and cash equivalents	$	273,329	$	—	$	56,519		$	329,848
Other current assets	580,231		14,068		(20,548		)	573,751
Property, plant and equipment, net	6,063,829		—		(40,003		)	6,023,826
Goodwill	7,996,760		—		23,101			8,019,861
Other assets, long-term	19,861,076		10,261		(6,541		)	19,864,796
Total assets	$	34,775,225	$	24,329	$	12,528		$	34,812,082
Current liabilities	$	2,492,983	$	6,978	$	20,401		$	2,520,362
Deferred tax liability, long-term	4,775,115		4,685		(10,514		)	4,769,286
Liabilities, long-term	21,779,997		—		6,394			21,786,391
Total liabilities	29,048,095		11,663		16,281			29,076,039
Redeemable equity	231,290		—		—			231,290
Paid-in capital	4,642,128		—		23,101			4,665,229
Retained earnings	854,824		12,666		(26,854		)	840,636
Total stockholders' equity	5,495,840		12,666		(3,753		)	5,504,753
Total liabilities and stockholders' equity	$	34,775,225	$	24,329	$	12,528		$	34,812,082

The following table summarizes the impact of adopting ASC 606 and ASU No. 2017-07 and the impact of the ATS Acquisition on the Company's condensed consolidated statements of operations:



	Three Months Ended June 30, 2017
	As Reported			Impact of ASC 606			Impact of ASU No. 2017-07			Impact of ATS Acquisition			As Adjusted
Residential:
Pay TV	$	1,059,857		$	11,306		$	—		$	—		$	1,071,163
Broadband	629,416			13,204			—			—			642,620
Telephony	208,451			(30,190		)	—			—			178,261
Business services and wholesale	323,940			(299		)	—			—			323,641
Advertising	97,501			—			—			—			97,501
Other	9,176			—			—			—			9,176
Total revenue	2,328,341			(5,979		)	—			—			2,322,362

Programming and other direct costs	758,694			—			—			—			758,694
Other operating expenses	593,690			(5,979		)	(5,055		)	8,566			591,222
Restructuring and other expense	12,388			—			—			—			12,388
Depreciation and amortization	706,787			—			—			3			706,790
Operating income	256,782			—			5,055			(8,569		)	253,268
Other expense, net	(980,640		)	—			(5,055		)	1			(985,694		)
Loss before income taxes	(723,858		)	—			—			(8,568		)	(732,426		)
Income tax benefit	249,068			—			—			3,419			252,487
Net loss	$	(474,790	)	$	—		$	—		$	(5,149	)	$	(479,939	)



	Six Months Ended June 30, 2017
	As Reported			Impact of ASC 606			Impact of ASU No. 2017-07			Impact of ATS Acquisition			As Adjusted
Residential:
Pay TV	$	2,131,218		$	23,823		$	—		$	—		$	2,155,041
Broadband	1,241,185			27,353			—			—			1,268,538
Telephony	419,324			(60,102		)	—			—			359,222
Business services and wholesale	643,531			(470		)	—			—			643,061
Advertising	180,862			—			—			—			180,862
Other	17,897			—			—			—			17,897
Total revenue	4,634,017			(9,396		)	—			—			4,624,621

Programming and other direct costs	1,517,046			—			—			—			1,517,046
Other operating expenses	1,207,127			(9,396		)	(6,931		)	8,566			1,199,366
Restructuring and other expense	89,317			—			—			—			89,317
Depreciation and amortization	1,315,511			—			—			3			1,315,514
Operating income	505,016			—			6,931			(8,569		)	503,378
Other expense, net	(1,350,970		)	—			(6,931		)	1			(1,357,900		)
Loss before income taxes	(845,954		)	—			—			(8,568		)	(854,522		)
Income tax benefit	294,976			—			—			3,419			298,395
Net loss	$	(550,978	)	$	—		$	—		$	(5,149	)	$	(556,127	)

NET LOSS PER SHARE ATTRIBUTABLE TO STOCKHOLDERS	6 Months Ended
NET LOSS PER SHARE ATTRIBUTABLE TO STOCKHOLDERS	Jun. 30, 2018
Earnings Per Share [Abstract]
NET LOSS PER SHARE ATTRIBUTABLE TO STOCKHOLDERS	NET LOSS PER SHARE ATTRIBUTABLE TO STOCKHOLDERS Basic 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 weighted average number of shares used to compute basic and diluted net loss per share for the three and six months ended June 30, 2017 reflect the retroactive impact of certain organizational transactions that occurred prior to the Company's IPO.

REVENUE AND CONTRACT ASSETS

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

REVENUE AND CONTRACT ASSETS

Revenue Recognition

Residential Services

The Company derives revenue through monthly charges to residential customers of its pay television, broadband, and telephony services, including installation services. In addition, the Company derives revenue from digital video recorder ("DVR"), video-on-demand ("VOD"), pay‑per‑view, and home shopping commissions which are reflected in "Residential pay TV" revenues. The Company recognizes pay television, broadband, and telephony revenues as the services are provided to a customer on a monthly basis. Revenue from the sale of bundled services at a discounted rate is allocated to each product based on the standalone selling price of each performance obligation within the bundled offer. The standalone selling price requires judgment and is typically determined based on the current prices at which the separate services are sold by the Company. Installation revenue for the Company's residential services is deferred and recognized over the benefit period, which is estimated to be less than one year. The estimated benefit period takes into account both quantitative and qualitative factors including the significance of average installation fees to total recurring revenue per customer.

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. In instances where the tax is being assessed directly on the Company, amounts paid to the governmental authorities are recorded as programming and other direct costs and amounts received from the customers are recorded as revenue. For the three and six months ended June 30, 2018 the amount of franchise fees and certain other taxes and fees included as a component of revenue aggregated $63,362 and $127,192, respectively. For the three and six months ended June 30, 2017 the amount of franchise fees and certain other taxes and fees included as a component of revenue aggregated $64,804 and $129,790, respectively.

Business and Wholesale Services

The Company derives revenue from the sale of products and services to both large enterprise and SMB customers, including broadband, telephony, networking, and pay television services reflected in "Business services and wholesale" revenues. The Company's business services also include Ethernet, data transport, and IP-based virtual private networks. The Company also provides managed services to businesses, including hosted telephony services (cloud based SIP-based private branch exchange), managed Wi-Fi, managed desktop and server backup and managed collaboration services including audio and web conferencing. The Company also offers fiber-to-the-tower services to wireless carriers for cell tower backhaul and enable wireline communications service providers to connect to customers that their own networks do not reach. The Company recognizes revenues for these services as the services are provided to a customer on a monthly basis.

Substantially all of our SMB customers are billed monthly and large enterprise customers are billed in accordance with the terms of their contracts which is typically also on a monthly basis. Contracts with large enterprise customers typically range from three to five years. Installation revenue related to our large enterprise customers is deferred and recognized over the average contract term. Installation revenue related to SMB customers is deferred and recognized over the benefit period, which is less than a year. The estimated benefit period for SMB customers takes into account both quantitative and qualitative factors including the significance of average installation fees to total recurring revenue per customer.

Advertising

As part of the agreements under which the Company acquires pay television programming, the Company typically receives an allocation of scheduled advertising time during such programming into which the Company's cable systems can insert commercials. In several of the markets in which the Company operates, it has entered into agreements commonly referred to as interconnects with other cable operators to jointly sell local advertising. In some of these markets, the Company represents the advertising sales efforts of other cable operators; in other markets, other cable operators represent the Company. Advertising revenues are recognized when commercials are aired. Arrangements in which the Company controls the sale of advertising and acts as the principal to the transaction, the Company recognizes revenue earned from the advertising customer on a gross basis and the amount remitted to the distributor as an operating expense. Arrangements in which the Company does not control the sale of advertising and acts as an agent to the transaction, the Company recognizes revenue net of any fee remitted to the distributor.

The Company's advanced advertising businesses provide data-driven, audience-based advertising solutions using advanced analytics tools that provide granular measurement of consumer groups, accurate hyper-local ratings and other insights into target audience behavior not available through traditional sample-based measurement services. Revenue earned from the Company's advanced advertising businesses are recognized when services are provided.

Other

Revenues derived from other sources are recognized when services are provided or events occur.

Contract Assets

Incremental costs incurred in obtaining a contract with a customer are deferred and recorded as a contract asset if the period of benefit is expected to be greater than one year. Sales commissions for enterprise and certain SMB customers are deferred and amortized over the average contract term. For sales commission expenses related to residential and SMB customers with a term of one year or less, the Company is utilizing the practical expedient and is recognizing the costs when incurred. Cost of fulfilling a contract with a customer are deferred and recorded as a contract asset if they generate or enhance resources of the Company that will be used in satisfying future performance obligations and are expected to be recovered. Installation costs related to residential and SMB customers that are not capitalized as part of the initial deployment of new customer premise equipment are expensed as incurred pursuant to industry-specific guidance.

The following table provides information about contracts assets and contract liabilities related to contracts with customers:



	June 30, 2018		December 31, 2017, as adjusted
Contract assets (a)	$	24,358	$	24,329
Deferred revenue (b)	138,165		117,679


(a)	Contract assets include primarily sales commissions for enterprise customers that are deferred and amortized over the average contract term.

(b)

Deferred revenue represents payments received from customers for services that have yet to be provided and installation revenue which is deferred and recognized over the benefit period. The majority of the Company's deferred revenue represents payments for services for up to one month in advance from residential and SMB customers which is realized within the following month as services are performed.

A significant portion of our revenue is derived from residential and SMB customer contracts which are month-to month. As such, the amount of revenue related to unsatisfied performance obligations is not necessarily indicative of the future revenue to be recognized from our existing customer base. Contracts with enterprise customers generally range from three to five years, and services may only be terminated in accordance with the contractual terms.

SUPPLEMENTAL CASH FLOW INFORMATION

6 Months Ended

Jun. 30, 2018

Supplemental Cash Flow Elements [Abstract]

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:



	Six Months Ended June 30,
	2018		2017
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	120,958		87,003
Notes payable issued to vendor for the purchase of equipment	44,466		—
Capital lease obligations	1,349		—
Leasehold improvements paid by landlord	350		—
Supplemental Data:
Cash interest paid	732,231		1,000,276
Income taxes paid, net	8,940		19,442

The Company’s previously reported statement of cash flows for the three months ended March 31, 2017 reflected distributions to stockholders of $79,617 in cash flows from operating activities. These distributions should have been reflected in cash flows from financing activities.

RESTRUCTURING COSTS AND OTHER EXPENSE

6 Months Ended

Jun. 30, 2018

Restructuring and Related Activities [Abstract]

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 2018:
	Severance and Other Employee Related Costs			Facility Realignment and Other Costs			Total
Accrual balance at December 31, 2017	$	113,474		$	9,626		$	123,100
Restructuring charges	4,182			3,334			7,516
Payments and other	(65,692		)	(5,853		)	(71,545		)
Accrual balance at June 30, 2018	$	51,964		$	7,107		$	59,071

The Company recorded restructuring charges of $12,246 and $88,997 for the three and six months ended June 30, 2017 relating to the 2016 Restructuring Plan.

Cumulative costs through June 30, 2018 relating to the 2016 Restructuring Plan amounted to $315,319 and $68,696 for our Cablevision and Cequel segments, respectively.

Transaction Costs

The Company incurred transaction costs of $3,496 and $5,762 for the three and six months ended June 30, 2018 relating to the Distribution discussed in Note 1 and $142 and $320 for the three and six months ended June 30, 2017 related to the acquisition of a business.

INTANGIBLE ASSETS

6 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

INTANGIBLE ASSETS

The following table summarizes information relating to the Company's acquired amortizable intangible assets:



	June 30, 2018							December 31, 2017
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Estimated Useful Lives

Customer relationships	$	5,970,884	$	(1,797,079	)	$	4,173,805	$	5,970,884	$	(1,409,021	)	$	4,561,863	8 to 18 years
Trade names	1,067,083		(654,498		)	412,585		1,067,083		(588,574		)	478,509		2 to 5 years
Other amortizable intangibles	37,060		(14,865		)	22,195		37,060		(10,978		)	26,082		1 to 15 years
	$	7,075,027	$	(2,466,442	)	$	4,608,585	$	7,075,027	$	(2,008,573	)	$	5,066,454

Amortization expense for the three and six months ended June 30, 2018 aggregated to $226,052 and $457,869, respectively, and for the three and six months ended June 30, 2017 aggregated $317,219 and $555,238, respectively.

The following table summarizes information relating to the Company's acquired indefinite-lived intangible assets:



	June 30, 2018						December 31, 2017
	Cablevision		Cequel		Total		Cablevision		Cequel		Total
Cable television franchises	$	8,113,575	$	4,906,506	$	13,020,081	$	8,113,575	$	4,906,506	$	13,020,081
Goodwill	5,866,108		2,138,700		8,004,808		5,866,120		2,153,741		8,019,861
Total	$	13,979,683	$	7,045,206	$	21,024,889	$	13,979,695	$	7,060,247	$	21,039,942

The carrying amount of goodwill is presented below:



Gross goodwill as of December 31, 2017, as reported	$	7,996,760
ATS goodwill included in Cablevision segment (See Note 3 for further details)	23,101
Gross goodwill as of December 31, 2017, as adjusted	8,019,861
Adjustment to purchase accounting relating to business acquired in fourth quarter of 2017	(12		)
Reclassification of Cequel segment goodwill to property, plant and equipment	(15,041		)
Net goodwill as of June 30, 2018	$	8,004,808

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

DEBT

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

DEBT

The following table provides details of the Company's outstanding credit facility debt:



			June 30, 2018				December 31, 2017
	Maturity Date	Interest Rate	Principal Amount		Carrying Amount (a)		Principal Amount		Carrying Amount (a)
CSC Holdings Restricted Group:
Revolving Credit Facility (b)	$20,000 on October 9, 2020, remaining balance on November 30, 2021	—%	$	—	$	—	$	450,000	$	425,488
Term Loan Facility	July 17, 2025	4.32%	2,970,000		2,953,265		2,985,000		2,967,818
Incremental Term Loan Facility	January 25, 2026	4.57%	1,500,000		1,482,214		—		—
Cequel:
Revolving Credit Facility (c)	$65,000 on November 30, 2021, and remaining balance on April 5, 2023	—%	—		—		—		—
Term Loan Facility	July 28, 2025	4.34%	1,252,350		1,244,153		1,258,675		1,250,217
			$	5,722,350	5,679,632		$	4,693,675	4,643,523
Less: Current portion					53,900				42,650
Long-term debt					$	5,625,732			$	4,600,873


(a)	The carrying amount is net of the unamortized deferred financing costs and/or discounts/premiums.


(b)	At June 30, 2018, $138,323 of the revolving credit facility was restricted for certain letters of credit issued on behalf of the Company and $2,161,677 of the facility was undrawn and available, subject to covenant limitations.


(c)	At June 30, 2018, $7,636 of the revolving credit facility was restricted for certain letters of credit issued on behalf of the Company and $342,364 of the facility was undrawn and available, subject to covenant limitations.

In January 2018, CSC Holdings borrowed $150,000 under its revolving credit facility and entered into a new $1,500,000 incremental term loan facility (the "Incremental Term Loan") under its existing credit facilities agreement. The Incremental Term Loan was priced at 99.5% and will mature on January 25, 2026. The Incremental Term Loan is comprised of eurodollar borrowings or alternate base rate borrowings, and bears 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 (i) with respect to any alternate base rate loan, 1.50% per annum and (ii) with respect to any eurodollar loan, 2.50% per annum.

The Company made a voluntary repayment of $600,000 under the CSC Holdings revolving credit facility in January 2018.

On March 22, 2018, Altice US Finance I Corporation, an indirect wholly-owned subsidiary of the Company, entered into a Fourth Amendment to Cequel Credit Agreement (Extension Amendment), by and among the borrower, the Revolving Consent Lenders (as defined in the Fourth Amendment) and JPMorgan Chase Bank, N.A., as administrative agent for the lenders (the “Fourth Amendment”). The Fourth Amendment amends and supplements the Borrower’s credit agreement, dated as of June 12, 2015, as amended by the first amendment (refinancing amendment), dated as of October 25, 2016, the second amendment (extension amendment), dated as of December 9, 2016, and the third amendment (incremental loan assumption agreement and refinancing amendment), dated as of March 15, 2017, (as so amended and as may be further amended, restated, modified or supplemented from time to time and as further amended by the Fourth Amendment among, inter alios, the borrower, the lenders party thereto and the administrative agent.

The Fourth Amendment extends the maturity date of the revolving loans and/or commitments of the Revolving Consent Lenders to April 5, 2023. The Fourth Amendment and the extended maturity date will not apply to the revolving loans and/or commitments of revolving lenders under the Cequel Credit Agreement that are not Revolving Consent Lenders.

As of June 30, 2018, the Company was in compliance with all of its financial covenants under the CSC Holdings credit facilities agreement and the Cequel credit facilities agreement.

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:



							June 30, 2018				December 31, 2017
Date Issued	Maturity Date	Interest Rate					Principal Amount		Carrying Amount (a)		Principal Amount		Carrying Amount (a)
CSC Holdings Senior Notes:
February 6, 1998	February 15, 2018	7.875	%	(b)	(f)	(o)	$	—	$	—	$	300,000	$	301,184
July 21, 1998	July 15, 2018	7.625	%	(b)	(f)	(q)	500,000		500,600		500,000		507,744
February 12, 2009	February 15, 2019	8.625	%	(c)	(f)		526,000		534,611		526,000		541,165
November 15, 2011	November 15, 2021	6.750	%	(c)	(f)		1,000,000		964,587		1,000,000		960,146
May 23, 2014	June 1, 2024	5.250	%	(c)	(f)		750,000		666,063		750,000		660,601
October 9, 2015	January 15, 2023	10.125	%	(e)			1,800,000		1,779,609		1,800,000		1,777,914
October 9, 2015	October 15, 2025	10.875	%	(e)	(l)		1,684,221		1,662,002		1,684,221		1,661,135
CSC Holdings Senior Guaranteed Notes:
October 9, 2015	October 15, 2025	6.625	%	(e)			1,000,000		987,368		1,000,000		986,717
September 23, 2016	April 15, 2027	5.500	%	(g)			1,310,000		1,304,697		1,310,000		1,304,468
January 29, 2018	February 1, 2028	5.375	%	(n)			1,000,000		991,730		—		—
Cablevision Senior Notes (k):
April 15, 2010	April 15, 2018	7.750	%	(c)	(f)	(o)	—		—		750,000		754,035
April 15, 2010	April 15, 2020	8.000	%	(c)	(f)		500,000		493,606		500,000		492,009
September 27, 2012	September 15, 2022	5.875	%	(c)	(f)		649,024		578,734		649,024		572,071
Cequel and Cequel Capital Senior Notes (l):
Oct. 25, 2012 Dec. 28, 2012	September 15, 2020	6.375	%	(d)	(m)		—		—		1,050,000		1,027,493
May 16, 2013 Sept. 9, 2014	December 15, 2021	5.125	%	(d)			1,250,000		1,151,107		1,250,000		1,138,870
June 12, 2015	July 15, 2025	7.750	%	(i)			620,000		605,143		620,000		604,374
April 5, 2018	April 1, 2028	7.500	%	(p)			1,050,000		1,048,185		—		—
Altice US Finance I Corporation Senior Secured Notes (l):
June 12, 2015	July 15, 2023	5.375	%	(h)			1,100,000		1,083,846		1,100,000		1,082,482
April 26, 2016	May 15, 2026	5.500	%	(j)			1,500,000		1,488,592		1,500,000		1,488,024
							$	16,239,245	15,840,480		$	16,289,245	15,860,432
Less: current portion									1,035,212				507,744
Long-term debt									$	14,805,268			$	15,352,688


(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 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 date of the Cablevision Acquisition (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)	The issuers of these notes have no ability to service interest or principal on the notes, other than through any dividends or distributions received from CSC Holdings. CSC Holdings is restricted, in certain circumstances, from paying dividends or distributions to the issuers by the terms of the CSC Holdings credit facilities agreement.

(l)

The issuers of these notes have no ability to service interest or principal on the notes, other than through any contributions/distributions from Cequel Communications, LLC (an indirect subsidiary of Cequel and the parent of Altice US Finance I). Cequel Communications, LLC is restricted in certain circumstances, from paying dividends or distributions to the issuers by the terms of the Cequel credit facilities agreement.


(m)	These notes were repaid in April 2018 with the proceeds from the issuance of new senior notes.

(n)

The 2028 Guaranteed Notes are redeemable at any time on or after February 1, 2023 at the redemption prices set forth in the indenture, plus accrued and unpaid interest, if any. In addition, up to 40% of the original aggregate principal amount of the notes may be redeemed using the proceeds of certain equity offerings before February 1, 2021, at a redemption price equal to 105.375%, plus accrued and unpaid interest.


(o)	These notes were repaid in February 2018 with the proceeds from the 2028 Guaranteed Notes (defined below) and with the proceeds from the Incremental Term Loan.

(p)

The 2028 Senior Notes are redeemable at any time prior to April 1, 2023 at a redemption price equal to 100% of the principal amount thereof plus the applicable premium plus accrued and unpaid interest, if any. Up to 40% of the original aggregate principal amount of the 2028 Senior Notes may be redeemed using the proceeds of certain equity offerings before April 1, 2021, at a redemption price equal to 107.50% of the principal amount, plus accrued and unpaid interest. In addition, the 2028 Senior Notes are redeemable at any time on or after April 1, 2023 at the redemption prices set forth in indenture, plus accrued and unpaid interest.


(q)	These notes were repaid in July 2018 with borrowings under CSC Holdings revolving credit facility agreement (see Note 17).

In January 2018, CSC Holdings issued $1,000,000 aggregate principal amount of 5.375% senior guaranteed notes due February 1, 2028 (the "2028 Guaranteed Notes"). The 2028 Guaranteed Notes are senior unsecured obligations and rank pari passu in right of payment with all of the existing and future senior indebtedness, including the existing senior notes and the CVC Credit Facilities and rank senior in right of payment to all of existing and future subordinated indebtedness.

The proceeds from the 2028 Guaranteed Notes, together with proceeds from the Incremental Term Loan (discussed above), borrowings under the CVC revolving credit facility and cash on hand, were used in February 2018 to repay $300,000 principal amount of CSC Holdings' senior notes due in February 2018 and $750,000 principal amount of Cablevision senior notes due in April 2018 and a portion was used to fund the dividend of $1,499,935 to the Company's stockholders immediately prior to and in connection with the Distribution discussed in Note 1. In connection with the redemption of Cablevision senior notes, the Company paid a call premium of approximately $7,019, which was recorded as a loss on extinguishment of debt and also recorded a write-off of the unamortized premium of $2,314.

In April 2018, Cequel Communications Holdings I, LLC and Cequel Capital Corporation each an indirect, wholly owned subsidiary of the Company, issued $1,050,000 aggregate principal amount of 7.50% senior notes due April 1, 2028 (the "2028 Senior Notes"). The proceeds of these notes were used in April 2018 to redeem the $1,050,000 aggregate principal amount 6 3/8% senior notes due September 15, 2020. In connection with the redemption of these notes, the Company paid a call premium of approximately $16,737, which was recorded as a loss on extinguishment of debt and also recorded a write-off of deferred financings costs aggregating $20,173.

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 June 30, 2018.

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.

In connection with the Company's IPO in June 2017, 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 in the second quarter of 2017. In connection with the conversion of the notes, the Company recorded a credit to paid in capital of $2,264,252 in the second quarter of 2017.

For the three and six months ended June 30, 2017, the Company recognized $42,817 and $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 June 30, 2018, including notes payable, collateralized indebtedness (see Note 10), and capital leases, are as follows:



Years Ending December 31,	Cablevision		Cequel		Total
2018	$	540,854	$	11,657	$	552,511
2019	595,243		43,984		639,227
2020	548,570		12,705		561,275
2021	2,506,990		1,262,715		3,769,705
2022	695,917		12,726		708,643
Thereafter	11,813,209		5,466,380		17,279,589

DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

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 condensed 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 condensed 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 condensed 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 June 30, 2018, 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 June 30, 2018.

Interest Rate Swap Contracts

In May 2018, the Company entered into two interest rate swap contracts whereby one contract converts the interest rate on $2,970,000 of the CSC Holdings Term Loan Facility from a one-month LIBO rate to a three-month LIBO rate minus 0.226% and the second contract converts the interest rate on $1,496,250 of the CSC Holdings Incremental Term Loan from a one-month LIBO rate to a three-month LIBO rate minus 0.226%. The objective of these swaps is to potentially pay a lower interest rate than what the Company can elect under the terms of the CSC Holdings credit facilities agreement.

In April 2018, the Company entered into an interest rate swap contract which converts the interest rate on $1,255,513 of the Cequel Term Loan B from a one-month LIBO rate to a three-month LIBO rate minus 0.225%. The objective of this swap is to potentially pay a lower interest rate than what the Company can elect under the terms of the Cequel credit facilities agreement.

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 a six-month LIBO rate and a second tranche of $750,000 from a fixed rate of 1.68% to a six-month LIBO rate. The objective of these swaps is to adjust the proportion of total debt that is subject to fixed and variable interest rates.

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 condensed consolidated balance sheets:



		Asset Derivatives				Liability Derivatives
Derivatives Not Designated as Hedging Instruments	Balance Sheet Location	Fair Value at June 30, 2018		Fair Value at December 31, 2017		Fair Value at June 30, 2018			Fair Value at December 31, 2017

Interest rate swap contracts	Derivative contracts, current	$	369	$	—	$	—		$	—
Prepaid forward contracts	Derivative contracts, current	9,623		52,545		(9,623		)	(52,545		)
Prepaid forward contracts	Derivative contracts, long-term	101,007		—		—			(109,504		)
Interest rate swap contracts	Liabilities under derivative contracts, long-term	—		—		(123,470		)	(77,902		)
		$	110,999	$	52,545	$	(133,093	)	$	(239,951	)

Gains from the Company's derivative contracts related to the Comcast common stock for the three and six months ended June 30, 2018 of $42,159 and $210,511, respectively, are reflected in gain (loss) on derivative contracts, net in the Company's condensed consolidated statement of operations.

For the three and six months ended June 30, 2018 , the Company recorded a loss on investments of $58,420 and $310,996, respectively, primarily representing the net decrease in the fair values of the investment securities pledged as collateral.

For the three and six months ended June 30, 2018, the Company recorded a loss on interest rate swap contracts of $12,929 and $44,851, 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 six months ended June 30, 2018:



Number of shares (a)	10,802,118
Collateralized indebtedness settled	$	(337,148	)
Derivatives contracts settled	24
	(337,124		)
Proceeds from new monetization contracts	337,124
Net cash proceeds	$	—

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.

FAIR VALUE MEASUREMENT

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

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	June 30, 2018		December 31, 2017
Assets:
Money market funds	Level I	$	218,940	$	5,949
Investment securities pledged as collateral	Level I	1,409,361		1,720,357
Prepaid forward contracts	Level II	110,630		52,545
Interest rate swap contracts	Level II	369		—
Liabilities:
Prepaid forward contracts	Level II	9,623		162,049
Interest rate swap contracts	Level II	123,470		77,902
Contingent consideration related to 2017 acquisitions	Level III	2,233		32,233

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 as of June 30, 2018 related to the acquisition in the fourth quarter of 2017 amounted to approximately $2,233. The estimated amount recorded as of June 30, 2018 is approximately 51% of the contractual amount. The fair value of the consideration was estimated based on a probability assessment of attaining the targets as of June 30, 2018.

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, 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 condensed consolidated balance sheets, are summarized as follows:



		June 30, 2018				December 31, 2017
	Fair Value Hierarchy	Carrying Amount (a)		Estimated Fair Value		Carrying Amount (a)		Estimated Fair Value
CSC Holdings debt instruments:
Credit facility debt	Level II	$	4,435,479	$	4,470,000	$	3,393,306	$	3,435,000
Collateralized indebtedness	Level II	1,392,648		1,338,105		1,349,474		1,305,932
Senior guaranteed notes	Level II	3,283,795		3,195,375		2,291,185		2,420,000
Senior notes and debentures	Level II	6,107,472		6,727,849		6,409,889		7,221,846
Notes payable	Level II	36,161		35,962		56,956		55,289
Cablevision senior notes:
Senior notes and debentures	Level II	1,072,340		1,165,034		1,818,115		1,931,239
Cequel debt instruments:
Cequel credit facility debt	Level II	1,244,153		1,252,350		1,250,217		1,258,675
Senior secured notes	Level II	2,572,438		2,535,500		2,570,506		2,658,930
Senior notes	Level II	2,804,435		2,942,800		2,770,737		2,983,615
Notes payable	Level II	36,356		36,356		8,946		8,946
		$	22,985,277	$	23,699,331	$	21,919,331	$	23,279,472


(a)	Amounts are net of unamortized deferred financing costs, premiums 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.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

INCOME TAXES	6 Months Ended
INCOME TAXES	Jun. 30, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES In general, the Company is required to use an estimated annual effective tax rate ("AETR") to measure the income tax expense or benefit recognized on a year to date basis in an interim period. . In addition, certain items included in income tax expense as well as the tax impact of certain items included in pretax income 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 $5,590 and $66,293 for the three and six months ended June 30, 2018, reflecting an effective tax rate of approximately 5% and 23%, respectively. The tax benefit was calculated based upon the actual effective tax rate for the year-to-date period. The Company determined this to represent the best estimate of the annual effective tax rate in light of the magnitude of the expected income and the significant permanent differences. The Company recorded income tax benefit of $252,487 and $298,395 for the three and six months ended June 30, 2017, reflecting the AETR of approximately 34% and 35%, respectively. As of June 30, 2018, the Company's federal net operating losses (“NOLs”) were approximately $2,274,000. 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

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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.

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 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, 2017	168,550,001		10,000,000	$	0.71
Vested	(43,462,500	)	—	0.37
Forfeited	(7,375,001	)	—	0.60
Balance, June 30, 2018	117,712,500		10,000,000	0.94

The weighted average fair value per unit was $2.14 and $2.50 as of June 30, 2018 and December 31, 2017, respectively. For the three and six months ended June 30, 2018, the Company recognized an expense of $7,993 and $25,494 related to the push down of share-based compensation expense related to the carry unit plan. For the three and six months ended June 30, 2017, the Company recognized an expense of $18,079 and $25,927 related to the push down of share-based compensation related to the carry unit plan.

Stock Option Plan

The following table summarizes activity related to employee stock options for the six months ended June 30, 2018:



	Shares Under Option				Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term (in years)
	Time Vesting		Performance Based Vesting		Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (a)
Balance at December 31, 2017	5,110,747		—		$	19.48	9.97	$	8,944
Granted	1,943,676		95,953		18.34
Forfeited	(179,705	)	(22,314	)	20.94
Balance at June 30, 2018	6,874,718		73,639		19.10		9.30	(14,202		)
Options exercisable at June 30, 2018	—		—		—		—	—


(a)	The aggregate intrinsic value is calculated as the difference between the exercise price and the closing price of the Company's Class A common stock at the respective date.

The Company recognized share based compensation expense related to employee stock options for the three and six months ended June 30, 2018 of $4,233 and $8,355, respectively.

The following aggregate assumptions were used to calculate the fair values of stock option awards granted during the six months ended June 30, 2018:



Risk-free interest rate		2.75%
Expected life (in years)		6.49
Dividend yield		—%
Volatility		35.16%
Grant date fair value		$7.08

AFFILIATE AND RELATED PARTY TRANSACTIONS

6 Months Ended

Jun. 30, 2018

AFFILIATE AND RELATED PARTY TRANSACTIONS

Equity Method Investments

In April 2018, Altice N.V. transferred its ownership of i24 US and i24 Europe ('i24NEWS"), Altice N.V.'s 24/7 international news and current affairs channels to the Company for minimal consideration (the "i24NEWS Acquisition"). As the acquisition was a combination of businesses under common control, the Company combined the results of operations and related assets and liabilities of i24NEWS as of April 1, 2018. Operating results for periods prior to April 1, 2018 and the balance sheet as of December 31, 2017 have not been revised to reflect the combination of i24NEWS as the impact was deemed immaterial.

The Company's equity in the net losses of i24NEWS prior to April 1, 2018 of $1,130 for the six months ended June 30, 2018 and $1,338 and $2,585 for three and six months ended June 30, 2017 were recorded using the equity method and reflected in other expense, net in the Company's statements of operations. The Company's investment in i24NEWS as of December 31, 2017 of $930 is included in investment in affiliates on the Company's condensed consolidated balance sheet.

In April 2018, the Company redeemed a 24% interest in Newsday LLC ("Newsday") and recognized a gain of $13,298, reflected in gain (loss) on investments and sale of affiliate interests, net in the Company's statements of operations. For the three and six months ended June 30, 2018, the Company recorded equity in the net loss of Newsday of $407 and $9,719, respectively. For the three and six months ended June 30, 2017, the Company recorded equity in net loss of Newsday of $27 and $1,537, respectively, reflected in other expense, net in the Company's statements of operations. The Company's deficit investment in Newsday as of June 30, 2018 and December 31, 2017 of $0 and $3,579, respectively, is included in deficit investment in affiliates on the Company's condensed consolidated balance sheets.

Affiliate and Related Party Transactions

Altice USA is controlled by Patrick Drahi who is also the controlling stockholder of Altice N.V. and its subsidiaries.

As the transactions discussed below were conducted between entities under common control by Mr. Drahi 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.

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 June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Revenue	$	727		$	253		$	852		$	394
Operating expenses:
Programming and other direct costs	(3,865		)	(1,095		)	(5,019		)	$	(1,830	)
Other operating expenses, net	(6,255		)	(8,666		)	(14,249		)	(15,964		)
Operating expenses, net	(10,120		)	(9,761		)	(19,268		)	(17,794		)

Interest expense (a)	—			(42,817		)	—			(90,405		)
Other expense, net	149			—			149			—
Loss on extinguishment of debt and write-off of deferred financing costs	—			(513,723		)	—			(513,723		)
Net charges	$	(9,244	)	$	(566,048	)	$	(18,267	)	$	(621,528	)
Capital Expenditures	$	1,108		$	8,473		$	2,734		$	9,365


(a)	In connection with the Company's IPO in June 2017, the Company converted the notes payable to affiliates and related parties into shares of the Company’s common stock at the IPO price.

Revenue

The Company recognized revenue primarily in connection with 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

A subsidiary of Altice N.V. provided 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 was an annual fee of $30,000 to be paid by the Company. Fees associated with this agreement recorded by the Company amounted to approximately $5,750 and $13,250 for the three and six months ended June 30, 2018, respectively and $7,500 and $15,000 for the three and six months ended June 30, 2017, 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. This agreement was terminated upon the completion of the Distribution discussed in Note 1.

Other operating expenses also include charges for services provided by other subsidiaries of Altice N.V. aggregating $505 and $999 for the three and six months ended June 30, 2018 and $1,166 and $964 for the three and six months ended June 30, 2017, respectively, net of credits of $359 and $841 for the three and six months ended June 30, 2017, for transition services provided to Newsday.

Capital Expenditures

Capital expenditures include $1,108 and $2,734 for the three and six months ended June 30, 2018 and $8,473 and $9,365, for the three and six months ended June 30, 2017, respectively, for equipment purchases and software development services provided by subsidiaries of Altice N.V.

Aggregate amounts that were due from and due to related parties are summarized below:



	June 30, 2018		December 31, 2017
Due from:
Altice US Finance S.A. (a)	$	13,100	$	12,951
Newsday (b)	2,581		2,713
Altice Management Americas (b)	1,271		33
i24 News (b)	—		4,036
Other Altice N.V. subsidiaries (b)	660		31
	$	17,612	$	19,764
Due to:
Altice N.V. (c)	13,250		—
Newsday (b)	42		33
Altice Labs S.A. (d)	1,899		7,354
Other Altice N.V. subsidiaries (d)	9,201		3,611
	$	24,392	$	10,998


(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, the net amounts due from the related party also include charges for certain transition services provided.


(c)	Represents amounts due to Altice N.V. pursuant to the agreement discussed above.


(d)	Represents amounts due to affiliates for the purchase of equipment and advertising services, as well as reimbursement for payments made on our behalf.

COMMITMENTS AND CONTINGENCIES	6 Months Ended
COMMITMENTS AND CONTINGENCIES	Jun. 30, 2018
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 was granted final approval by the Court on May 17, 2018. As of December 31, 2017, the Company had an estimated liability associated with a potential settlement totaling $6,000. 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, 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

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

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 June 30, 2018						Three Months Ended June 30, 2017
	Cablevision		Cequel		Total		Cablevision		Cequel		Total
Operating income	$	203,265	$	131,794	$	335,059	$	109,799	$	143,469	$	253,268
Share-based compensation	10,357		1,869		12,226		11,960		6,119		18,079
Restructuring and other expense	8,515		1,176		9,691		11,171		1,217		12,388
Depreciation and amortization (including impairments)	473,138		175,389		648,527		542,203		164,587		706,790
Adjusted EBITDA	$	695,275	$	310,228	$	1,005,503	$	675,133	$	315,392	$	990,525



	Six Months Ended June 30, 2018						Six Months Ended June 30, 2017
	Cablevision		Cequel		Total		Cablevision		Cequel		Total
Operating income	$	373,958	$	274,139	$	648,097	$	231,843	$	271,535	$	503,378
Share-based compensation	26,529		7,320		33,849		17,042		8,885		25,927
Restructuring and other expense	11,598		1,680		13,278		69,818		19,499		89,317
Depreciation and amortization (including impairments)	958,502		332,730		1,291,232		985,379		330,135		1,315,514
Adjusted EBITDA	$	1,370,587	$	615,869	$	1,986,456	$	1,304,082	$	630,054	$	1,934,136

A reconciliation of reportable segment amounts to the Company's condensed consolidated balances are as follows:



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Operating income for reportable segments	$	335,059		$	253,268		$	648,097		$	503,378
Items excluded from operating income:
Interest expense	(390,543		)	(420,370		)	(767,801		)	(853,664		)
Interest income	5,313			180			8,416			412
Gain (loss) on investments and sale of affiliate interests, net	(45,113		)	57,130			(293,715		)	188,788
Gain (loss) on derivative contracts, net	42,159			(66,463		)	210,511			(137,507		)
Gain (loss) on interest rate swap contracts	(12,929		)	9,146			(44,851		)	11,488
Loss on extinguishment of debt and write-off of deferred financing costs	(36,911		)	(561,382		)	(41,616		)	(561,382		)
Other expense, net	(629		)	(3,935		)	(12,287		)	(6,035		)
Loss before income taxes	$	(103,594	)	$	(732,426	)	$	(293,246	)	$	(854,522	)

The following tables present the composition of revenue by segment:



	Three Months Ended June 30, 2018									Three Months Ended June 30, 2017
	Cablevision		Cequel		Eliminations (a)			Total		Cablevision		Cequel		Total
Residential:
Pay TV	$	766,257	$	268,147	$	—		$	1,034,404	$	796,456	$	274,707	$	1,071,163
Broadband	449,426		262,776		—			712,202		405,199		237,421		642,620
Telephony	133,635		29,864		—			163,499		145,323		32,938		178,261
Business services and wholesale	236,763		100,625		—			337,388		230,964		92,677		323,641
Advertising	95,981		18,366		(4,449		)	109,898		78,802		18,699		97,501
Other	3,665		3,097		—			6,762		2,782		6,394		9,176
Total Revenue	$	1,685,727	$	682,875	$	(4,449	)	$	2,364,153	$	1,659,526	$	662,836	$	2,322,362



	Six Months Ended June 30, 2018									Six Months Ended June 30, 2017
	Cablevision		Cequel		Eliminations (a)			Total		Cablevision		Cequel		Total
Residential:
Pay TV	$	1,529,977	$	538,135	$	—		$	2,068,112	$	1,598,650	$	556,391	$	2,155,041
Broadband	889,777		524,046		—			1,413,823		801,532		467,006		1,268,538
Telephony	269,220		60,317		—			329,537		291,880		67,342		359,222
Business services and wholesale	470,935		199,543		—			670,478		459,508		183,553		643,061
Advertising	170,624		35,434		(8,578		)	197,480		143,934		36,928		180,862
Other	6,488		7,949		—			14,437		6,009		11,888		17,897
Total Revenue	$	3,337,021	$	1,365,424	$	(8,578	)	$	4,693,867	$	3,301,513	$	1,323,108	$	4,624,621

(a) Reflects revenue recognized by Cablevision from the sale of services to Cequel.

Capital expenditures (cash basis) by reportable segment are presented below:



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Cablevision	$	170,356	$	141,166	$	337,157	$	325,565
Cequel	70,326		64,997		161,140		138,025
	$	240,682	$	206,163	$	498,297	$	463,590

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.

SUBSEQUENT EVENT	6 Months Ended
SUBSEQUENT EVENT	Jun. 30, 2018
Subsequent Events [Abstract]
SUBSEQUENT EVENT	SUBSEQUENT EVENT In July 2018, CSC Holdings repaid its $500,000 principal amount of senior notes due July 15, 2018 with borrowings under the CSC Holdings revolving credit facility agreement.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	6 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Jun. 30, 2018
Accounting Policies [Abstract]
Recently Adopted Accounting Pronouncements and Recently Issued But Not Yet Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In February 2018, the FASB issued ASU No. 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220) Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The primary provision of ASU No. 2018-02 allows for the reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. ASU No. 2018-02 also requires certain disclosures about stranded tax effects. ASU No. 2018‑02 is effective for the Company on January 1, 2019, with early adoption permitted and will be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act is recognized. The Company elected to adopt ASU No. 2018-02 during the first quarter of 2018. The adoption resulted in the reclassification of stranded tax amounts of $2,163 associated with net unrecognized losses from the Company's pension plans from accumulated other comprehensive loss to retained earnings. 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 was adopted by the Company on January 1, 2018 and it had no impact to the Company's condensed consolidated financial statements. 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 was adopted by the Company on January 1, 2018 and was applied retrospectively. As a result of the adoption, the Company reclassified the non-service cost components of the Company's pension expense for the three and six months ended March 31, 2017 from other operating expenses to other income (expense), net. The Company elected to apply the practical expedient which allowed it to reclassify amounts disclosed previously in the benefits plan note as the basis for applying retrospective presentation for comparative periods, as the Company determined it was impracticable to disaggregate the cost components for amounts capitalized and amortized in those periods. See Note 3 for information on the impact of the adoption of ASU No. 2017-07. 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 Company adopted the new guidance on January 1, 2018 and it had no impact to the Company's condensed 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 was adopted by the Company on January 1, 2018 and it had no impact to the Company's condensed consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers ("ASC 606"), 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. ASC 606 replaced most existing revenue recognition guidance in GAAP and allowed the use of either the retrospective or cumulative effect transition method. 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. The amendments in this update affected the guidance in ASC 606. ASC 606 was adopted by the Company on January 1, 2018 on a full retrospective basis, which required the Company to reflect the impact of the updated guidance for all periods presented. The adoption of ASC 606 did not have a material impact on the Company’s financial position or results of operations. See Note 3 for information on the impact of the adoption of ASC 606. 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 Company adopted the new guidance on January 1, 2018 and it had no impact to the Company's condensed consolidated financial statements. Recently Issued But Not Yet Adopted Accounting Pronouncements 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 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. Although, the Company has not yet completed the evaluation of the effect that ASU No. 2016-02 will have on its consolidated financial statements, upon adoption, the Company expects to recognize a right of use asset and liability related to substantially all operating lease arrangements on the Company's consolidated balance sheet.

CHANGE IN ACCOUNTING POLICIES AND ATS ACQUISITION (Tables)

6 Months Ended

Jun. 30, 2018

Accounting Changes and Error Corrections [Abstract]

Schedule of New Accounting Pronouncements

The following table summarizes the impact of adopting ASC 606 and the impact of the ATS Acquisition on the Company's condensed consolidated balance sheet:



	December 31, 2017
	As Reported		Impact of ASC 606		Impact of ATS Acquisition			As Adjusted
Cash and cash equivalents	$	273,329	$	—	$	56,519		$	329,848
Other current assets	580,231		14,068		(20,548		)	573,751
Property, plant and equipment, net	6,063,829		—		(40,003		)	6,023,826
Goodwill	7,996,760		—		23,101			8,019,861
Other assets, long-term	19,861,076		10,261		(6,541		)	19,864,796
Total assets	$	34,775,225	$	24,329	$	12,528		$	34,812,082
Current liabilities	$	2,492,983	$	6,978	$	20,401		$	2,520,362
Deferred tax liability, long-term	4,775,115		4,685		(10,514		)	4,769,286
Liabilities, long-term	21,779,997		—		6,394			21,786,391
Total liabilities	29,048,095		11,663		16,281			29,076,039
Redeemable equity	231,290		—		—			231,290
Paid-in capital	4,642,128		—		23,101			4,665,229
Retained earnings	854,824		12,666		(26,854		)	840,636
Total stockholders' equity	5,495,840		12,666		(3,753		)	5,504,753
Total liabilities and stockholders' equity	$	34,775,225	$	24,329	$	12,528		$	34,812,082

The following table summarizes the impact of adopting ASC 606 and ASU No. 2017-07 and the impact of the ATS Acquisition on the Company's condensed consolidated statements of operations:



	Three Months Ended June 30, 2017
	As Reported			Impact of ASC 606			Impact of ASU No. 2017-07			Impact of ATS Acquisition			As Adjusted
Residential:
Pay TV	$	1,059,857		$	11,306		$	—		$	—		$	1,071,163
Broadband	629,416			13,204			—			—			642,620
Telephony	208,451			(30,190		)	—			—			178,261
Business services and wholesale	323,940			(299		)	—			—			323,641
Advertising	97,501			—			—			—			97,501
Other	9,176			—			—			—			9,176
Total revenue	2,328,341			(5,979		)	—			—			2,322,362

Programming and other direct costs	758,694			—			—			—			758,694
Other operating expenses	593,690			(5,979		)	(5,055		)	8,566			591,222
Restructuring and other expense	12,388			—			—			—			12,388
Depreciation and amortization	706,787			—			—			3			706,790
Operating income	256,782			—			5,055			(8,569		)	253,268
Other expense, net	(980,640		)	—			(5,055		)	1			(985,694		)
Loss before income taxes	(723,858		)	—			—			(8,568		)	(732,426		)
Income tax benefit	249,068			—			—			3,419			252,487
Net loss	$	(474,790	)	$	—		$	—		$	(5,149	)	$	(479,939	)



	Six Months Ended June 30, 2017
	As Reported			Impact of ASC 606			Impact of ASU No. 2017-07			Impact of ATS Acquisition			As Adjusted
Residential:
Pay TV	$	2,131,218		$	23,823		$	—		$	—		$	2,155,041
Broadband	1,241,185			27,353			—			—			1,268,538
Telephony	419,324			(60,102		)	—			—			359,222
Business services and wholesale	643,531			(470		)	—			—			643,061
Advertising	180,862			—			—			—			180,862
Other	17,897			—			—			—			17,897
Total revenue	4,634,017			(9,396		)	—			—			4,624,621

Programming and other direct costs	1,517,046			—			—			—			1,517,046
Other operating expenses	1,207,127			(9,396		)	(6,931		)	8,566			1,199,366
Restructuring and other expense	89,317			—			—			—			89,317
Depreciation and amortization	1,315,511			—			—			3			1,315,514
Operating income	505,016			—			6,931			(8,569		)	503,378
Other expense, net	(1,350,970		)	—			(6,931		)	1			(1,357,900		)
Loss before income taxes	(845,954		)	—			—			(8,568		)	(854,522		)
Income tax benefit	294,976			—			—			3,419			298,395
Net loss	$	(550,978	)	$	—		$	—		$	(5,149	)	$	(556,127	)

REVENUE AND CONTRACT ASSETS (Tables)

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Receivables, Contracts Assets and Contract Liabilities Related To Contracts With Customers

The following table provides information about contracts assets and contract liabilities related to contracts with customers:



	June 30, 2018		December 31, 2017, as adjusted
Contract assets (a)	$	24,358	$	24,329
Deferred revenue (b)	138,165		117,679


(a)	Contract assets include primarily sales commissions for enterprise customers that are deferred and amortized over the average contract term.

(b)

Deferred revenue represents payments received from customers for services that have yet to be provided and installation revenue which is deferred and recognized over the benefit period. The majority of the Company's deferred revenue represents payments for services for up to one month in advance from residential and SMB customers which is realized within the following month as services are performed.

SUPPLEMENTAL CASH FLOW INFORMATION (Tables)

6 Months Ended

Jun. 30, 2018

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:



	Six Months Ended June 30,
	2018		2017
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	120,958		87,003
Notes payable issued to vendor for the purchase of equipment	44,466		—
Capital lease obligations	1,349		—
Leasehold improvements paid by landlord	350		—
Supplemental Data:
Cash interest paid	732,231		1,000,276
Income taxes paid, net	8,940		19,442

RESTRUCTURING COSTS AND OTHER EXPENSE (Tables)

6 Months Ended

Jun. 30, 2018

Restructuring and Related Activities [Abstract]

Restructuring Cost Activity



The following table summarizes the activity for the 2016 Restructuring Plan during 2018:
	Severance and Other Employee Related Costs			Facility Realignment and Other Costs			Total
Accrual balance at December 31, 2017	$	113,474		$	9,626		$	123,100
Restructuring charges	4,182			3,334			7,516
Payments and other	(65,692		)	(5,853		)	(71,545		)
Accrual balance at June 30, 2018	$	51,964		$	7,107		$	59,071

INTANGIBLE ASSETS (Tables)

6 Months Ended

Jun. 30, 2018

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 amortizable intangible assets:



	June 30, 2018							December 31, 2017
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Estimated Useful Lives

Customer relationships	$	5,970,884	$	(1,797,079	)	$	4,173,805	$	5,970,884	$	(1,409,021	)	$	4,561,863	8 to 18 years
Trade names	1,067,083		(654,498		)	412,585		1,067,083		(588,574		)	478,509		2 to 5 years
Other amortizable intangibles	37,060		(14,865		)	22,195		37,060		(10,978		)	26,082		1 to 15 years
	$	7,075,027	$	(2,466,442	)	$	4,608,585	$	7,075,027	$	(2,008,573	)	$	5,066,454

Schedule of Indefinite-Lived Intangible Assets

The following table summarizes information relating to the Company's acquired indefinite-lived intangible assets:



	June 30, 2018						December 31, 2017
	Cablevision		Cequel		Total		Cablevision		Cequel		Total
Cable television franchises	$	8,113,575	$	4,906,506	$	13,020,081	$	8,113,575	$	4,906,506	$	13,020,081
Goodwill	5,866,108		2,138,700		8,004,808		5,866,120		2,153,741		8,019,861
Total	$	13,979,683	$	7,045,206	$	21,024,889	$	13,979,695	$	7,060,247	$	21,039,942

Schedule of Goodwill

The carrying amount of goodwill is presented below:



Gross goodwill as of December 31, 2017, as reported	$	7,996,760
ATS goodwill included in Cablevision segment (See Note 3 for further details)	23,101
Gross goodwill as of December 31, 2017, as adjusted	8,019,861
Adjustment to purchase accounting relating to business acquired in fourth quarter of 2017	(12		)
Reclassification of Cequel segment goodwill to property, plant and equipment	(15,041		)
Net goodwill as of June 30, 2018	$	8,004,808

DEBT (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Schedule of Line of Credit Facilities

The following table provides details of the Company's outstanding credit facility debt:



			June 30, 2018				December 31, 2017
	Maturity Date	Interest Rate	Principal Amount		Carrying Amount (a)		Principal Amount		Carrying Amount (a)
CSC Holdings Restricted Group:
Revolving Credit Facility (b)	$20,000 on October 9, 2020, remaining balance on November 30, 2021	—%	$	—	$	—	$	450,000	$	425,488
Term Loan Facility	July 17, 2025	4.32%	2,970,000		2,953,265		2,985,000		2,967,818
Incremental Term Loan Facility	January 25, 2026	4.57%	1,500,000		1,482,214		—		—
Cequel:
Revolving Credit Facility (c)	$65,000 on November 30, 2021, and remaining balance on April 5, 2023	—%	—		—		—		—
Term Loan Facility	July 28, 2025	4.34%	1,252,350		1,244,153		1,258,675		1,250,217
			$	5,722,350	5,679,632		$	4,693,675	4,643,523
Less: Current portion					53,900				42,650
Long-term debt					$	5,625,732			$	4,600,873


(a)	The carrying amount is net of the unamortized deferred financing costs and/or discounts/premiums.


(b)	At June 30, 2018, $138,323 of the revolving credit facility was restricted for certain letters of credit issued on behalf of the Company and $2,161,677 of the facility was undrawn and available, subject to covenant limitations.


(c)	At June 30, 2018, $7,636 of the revolving credit facility was restricted for certain letters of credit issued on behalf of the Company and $342,364 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:



							June 30, 2018				December 31, 2017
Date Issued	Maturity Date	Interest Rate					Principal Amount		Carrying Amount (a)		Principal Amount		Carrying Amount (a)
CSC Holdings Senior Notes:
February 6, 1998	February 15, 2018	7.875	%	(b)	(f)	(o)	$	—	$	—	$	300,000	$	301,184
July 21, 1998	July 15, 2018	7.625	%	(b)	(f)	(q)	500,000		500,600		500,000		507,744
February 12, 2009	February 15, 2019	8.625	%	(c)	(f)		526,000		534,611		526,000		541,165
November 15, 2011	November 15, 2021	6.750	%	(c)	(f)		1,000,000		964,587		1,000,000		960,146
May 23, 2014	June 1, 2024	5.250	%	(c)	(f)		750,000		666,063		750,000		660,601
October 9, 2015	January 15, 2023	10.125	%	(e)			1,800,000		1,779,609		1,800,000		1,777,914
October 9, 2015	October 15, 2025	10.875	%	(e)	(l)		1,684,221		1,662,002		1,684,221		1,661,135
CSC Holdings Senior Guaranteed Notes:
October 9, 2015	October 15, 2025	6.625	%	(e)			1,000,000		987,368		1,000,000		986,717
September 23, 2016	April 15, 2027	5.500	%	(g)			1,310,000		1,304,697		1,310,000		1,304,468
January 29, 2018	February 1, 2028	5.375	%	(n)			1,000,000		991,730		—		—
Cablevision Senior Notes (k):
April 15, 2010	April 15, 2018	7.750	%	(c)	(f)	(o)	—		—		750,000		754,035
April 15, 2010	April 15, 2020	8.000	%	(c)	(f)		500,000		493,606		500,000		492,009
September 27, 2012	September 15, 2022	5.875	%	(c)	(f)		649,024		578,734		649,024		572,071
Cequel and Cequel Capital Senior Notes (l):
Oct. 25, 2012 Dec. 28, 2012	September 15, 2020	6.375	%	(d)	(m)		—		—		1,050,000		1,027,493
May 16, 2013 Sept. 9, 2014	December 15, 2021	5.125	%	(d)			1,250,000		1,151,107		1,250,000		1,138,870
June 12, 2015	July 15, 2025	7.750	%	(i)			620,000		605,143		620,000		604,374
April 5, 2018	April 1, 2028	7.500	%	(p)			1,050,000		1,048,185		—		—
Altice US Finance I Corporation Senior Secured Notes (l):
June 12, 2015	July 15, 2023	5.375	%	(h)			1,100,000		1,083,846		1,100,000		1,082,482
April 26, 2016	May 15, 2026	5.500	%	(j)			1,500,000		1,488,592		1,500,000		1,488,024
							$	16,239,245	15,840,480		$	16,289,245	15,860,432
Less: current portion									1,035,212				507,744
Long-term debt									$	14,805,268			$	15,352,688


(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 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 date of the Cablevision Acquisition (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)	The issuers of these notes have no ability to service interest or principal on the notes, other than through any dividends or distributions received from CSC Holdings. CSC Holdings is restricted, in certain circumstances, from paying dividends or distributions to the issuers by the terms of the CSC Holdings credit facilities agreement.

(l)

The issuers of these notes have no ability to service interest or principal on the notes, other than through any contributions/distributions from Cequel Communications, LLC (an indirect subsidiary of Cequel and the parent of Altice US Finance I). Cequel Communications, LLC is restricted in certain circumstances, from paying dividends or distributions to the issuers by the terms of the Cequel credit facilities agreement.


(m)	These notes were repaid in April 2018 with the proceeds from the issuance of new senior notes.

(n)

The 2028 Guaranteed Notes are redeemable at any time on or after February 1, 2023 at the redemption prices set forth in the indenture, plus accrued and unpaid interest, if any. In addition, up to 40% of the original aggregate principal amount of the notes may be redeemed using the proceeds of certain equity offerings before February 1, 2021, at a redemption price equal to 105.375%, plus accrued and unpaid interest.


(o)	These notes were repaid in February 2018 with the proceeds from the 2028 Guaranteed Notes (defined below) and with the proceeds from the Incremental Term Loan.

(p)

The 2028 Senior Notes are redeemable at any time prior to April 1, 2023 at a redemption price equal to 100% of the principal amount thereof plus the applicable premium plus accrued and unpaid interest, if any. Up to 40% of the original aggregate principal amount of the 2028 Senior Notes may be redeemed using the proceeds of certain equity offerings before April 1, 2021, at a redemption price equal to 107.50% of the principal amount, plus accrued and unpaid interest. In addition, the 2028 Senior Notes are redeemable at any time on or after April 1, 2023 at the redemption prices set forth in indenture, plus accrued and unpaid interest.


(q)	These notes were repaid in July 2018 with borrowings under CSC Holdings revolving credit facility agreement (see Note 17).

Schedule of Maturities of Long-term Debt

The future maturities of debt payable by the Company under its various debt obligations outstanding as of June 30, 2018, including notes payable, collateralized indebtedness (see Note 10), and capital leases, are as follows:



Years Ending December 31,	Cablevision		Cequel		Total
2018	$	540,854	$	11,657	$	552,511
2019	595,243		43,984		639,227
2020	548,570		12,705		561,275
2021	2,506,990		1,262,715		3,769,705
2022	695,917		12,726		708,643
Thereafter	11,813,209		5,466,380		17,279,589

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21521-112644

+ Details

DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS (Tables)

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Settlement of Collateralized Indebtedness [Table Text Block]

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 six months ended June 30, 2018:



Number of shares (a)	10,802,118
Collateralized indebtedness settled	$	(337,148	)
Derivatives contracts settled	24
	(337,124		)
Proceeds from new monetization contracts	337,124
Net cash proceeds	$	—

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 condensed consolidated balance sheets:



		Asset Derivatives				Liability Derivatives
Derivatives Not Designated as Hedging Instruments	Balance Sheet Location	Fair Value at June 30, 2018		Fair Value at December 31, 2017		Fair Value at June 30, 2018			Fair Value at December 31, 2017

Interest rate swap contracts	Derivative contracts, current	$	369	$	—	$	—		$	—
Prepaid forward contracts	Derivative contracts, current	9,623		52,545		(9,623		)	(52,545		)
Prepaid forward contracts	Derivative contracts, long-term	101,007		—		—			(109,504		)
Interest rate swap contracts	Liabilities under derivative contracts, long-term	—		—		(123,470		)	(77,902		)
		$	110,999	$	52,545	$	(133,093	)	$	(239,951	)

FAIR VALUE MEASUREMENT (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

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	June 30, 2018		December 31, 2017
Assets:
Money market funds	Level I	$	218,940	$	5,949
Investment securities pledged as collateral	Level I	1,409,361		1,720,357
Prepaid forward contracts	Level II	110,630		52,545
Interest rate swap contracts	Level II	369		—
Liabilities:
Prepaid forward contracts	Level II	9,623		162,049
Interest rate swap contracts	Level II	123,470		77,902
Contingent consideration related to 2017 acquisitions	Level III	2,233		32,233

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments



		June 30, 2018				December 31, 2017
	Fair Value Hierarchy	Carrying Amount (a)		Estimated Fair Value		Carrying Amount (a)		Estimated Fair Value
CSC Holdings debt instruments:
Credit facility debt	Level II	$	4,435,479	$	4,470,000	$	3,393,306	$	3,435,000
Collateralized indebtedness	Level II	1,392,648		1,338,105		1,349,474		1,305,932
Senior guaranteed notes	Level II	3,283,795		3,195,375		2,291,185		2,420,000
Senior notes and debentures	Level II	6,107,472		6,727,849		6,409,889		7,221,846
Notes payable	Level II	36,161		35,962		56,956		55,289
Cablevision senior notes:
Senior notes and debentures	Level II	1,072,340		1,165,034		1,818,115		1,931,239
Cequel debt instruments:
Cequel credit facility debt	Level II	1,244,153		1,252,350		1,250,217		1,258,675
Senior secured notes	Level II	2,572,438		2,535,500		2,570,506		2,658,930
Senior notes	Level II	2,804,435		2,942,800		2,770,737		2,983,615
Notes payable	Level II	36,356		36,356		8,946		8,946
		$	22,985,277	$	23,699,331	$	21,919,331	$	23,279,472


(a)	Amounts are net of unamortized deferred financing costs, premiums and discounts.

SHARE BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2018

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, 2017	168,550,001		10,000,000	$	0.71
Vested	(43,462,500	)	—	0.37
Forfeited	(7,375,001	)	—	0.60
Balance, June 30, 2018	117,712,500		10,000,000	0.94

Stock Option Activity

The following table summarizes activity related to employee stock options for the six months ended June 30, 2018:



	Shares Under Option				Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term (in years)
	Time Vesting		Performance Based Vesting		Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (a)
Balance at December 31, 2017	5,110,747		—		$	19.48	9.97	$	8,944
Granted	1,943,676		95,953		18.34
Forfeited	(179,705	)	(22,314	)	20.94
Balance at June 30, 2018	6,874,718		73,639		19.10		9.30	(14,202		)
Options exercisable at June 30, 2018	—		—		—		—	—


(a)	The aggregate intrinsic value is calculated as the difference between the exercise price and the closing price of the Company's Class A common stock at the respective date.

Aggregate Assumptions Used to Calculated the Fair Values of Stock Options

The following aggregate assumptions were used to calculate the fair values of stock option awards granted during the six months ended June 30, 2018:



Risk-free interest rate		2.75%
Expected life (in years)		6.49
Dividend yield		—%
Volatility		35.16%
Grant date fair value		$7.08

RELATED PARTY TRANSACTIONS (Tables)

6 Months Ended

Jun. 30, 2018

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 June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Revenue	$	727		$	253		$	852		$	394
Operating expenses:
Programming and other direct costs	(3,865		)	(1,095		)	(5,019		)	$	(1,830	)
Other operating expenses, net	(6,255		)	(8,666		)	(14,249		)	(15,964		)
Operating expenses, net	(10,120		)	(9,761		)	(19,268		)	(17,794		)

Interest expense (a)	—			(42,817		)	—			(90,405		)
Other expense, net	149			—			149			—
Loss on extinguishment of debt and write-off of deferred financing costs	—			(513,723		)	—			(513,723		)
Net charges	$	(9,244	)	$	(566,048	)	$	(18,267	)	$	(621,528	)
Capital Expenditures	$	1,108		$	8,473		$	2,734		$	9,365


(a)	In connection with the Company's IPO in June 2017, the Company converted the notes payable to affiliates and related parties into shares of the Company’s common stock at the IPO price.

Aggregate amounts that were due from and due to related parties are summarized below:



	June 30, 2018		December 31, 2017
Due from:
Altice US Finance S.A. (a)	$	13,100	$	12,951
Newsday (b)	2,581		2,713
Altice Management Americas (b)	1,271		33
i24 News (b)	—		4,036
Other Altice N.V. subsidiaries (b)	660		31
	$	17,612	$	19,764
Due to:
Altice N.V. (c)	13,250		—
Newsday (b)	42		33
Altice Labs S.A. (d)	1,899		7,354
Other Altice N.V. subsidiaries (d)	9,201		3,611
	$	24,392	$	10,998


(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, the net amounts due from the related party also include charges for certain transition services provided.


(c)	Represents amounts due to

SEGMENT INFORMATION (Tables)

6 Months Ended

Jun. 30, 2018

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 June 30, 2018						Three Months Ended June 30, 2017
	Cablevision		Cequel		Total		Cablevision		Cequel		Total
Operating income	$	203,265	$	131,794	$	335,059	$	109,799	$	143,469	$	253,268
Share-based compensation	10,357		1,869		12,226		11,960		6,119		18,079
Restructuring and other expense	8,515		1,176		9,691		11,171		1,217		12,388
Depreciation and amortization (including impairments)	473,138		175,389		648,527		542,203		164,587		706,790
Adjusted EBITDA	$	695,275	$	310,228	$	1,005,503	$	675,133	$	315,392	$	990,525

Reconciliation of Reportable Segment Amounts to Cablevision's and CSC Holdings' Consolidated Balances

A reconciliation of reportable segment amounts to the Company's condensed consolidated balances are as follows:



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Operating income for reportable segments	$	335,059		$	253,268		$	648,097		$	503,378
Items excluded from operating income:
Interest expense	(390,543		)	(420,370		)	(767,801		)	(853,664		)
Interest income	5,313			180			8,416			412
Gain (loss) on investments and sale of affiliate interests, net	(45,113		)	57,130			(293,715		)	188,788
Gain (loss) on derivative contracts, net	42,159			(66,463		)	210,511			(137,507		)
Gain (loss) on interest rate swap contracts	(12,929		)	9,146			(44,851		)	11,488
Loss on extinguishment of debt and write-off of deferred financing costs	(36,911		)	(561,382		)	(41,616		)	(561,382		)
Other expense, net	(629		)	(3,935		)	(12,287		)	(6,035		)
Loss before income taxes	$	(103,594	)	$	(732,426	)	$	(293,246	)	$	(854,522	)

Schedule of Revenue by Products and Services and Segments

The following tables present the composition of revenue by segment:



	Three Months Ended June 30, 2018									Three Months Ended June 30, 2017
	Cablevision		Cequel		Eliminations (a)			Total		Cablevision		Cequel		Total
Residential:
Pay TV	$	766,257	$	268,147	$	—		$	1,034,404	$	796,456	$	274,707	$	1,071,163
Broadband	449,426		262,776		—			712,202		405,199		237,421		642,620
Telephony	133,635		29,864		—			163,499		145,323		32,938		178,261
Business services and wholesale	236,763		100,625		—			337,388		230,964		92,677		323,641
Advertising	95,981		18,366		(4,449		)	109,898		78,802		18,699		97,501
Other	3,665		3,097		—			6,762		2,782		6,394		9,176
Total Revenue	$	1,685,727	$	682,875	$	(4,449	)	$	2,364,153	$	1,659,526	$	662,836	$	2,322,362



	Six Months Ended June 30, 2018									Six Months Ended June 30, 2017
	Cablevision		Cequel		Eliminations (a)			Total		Cablevision		Cequel		Total
Residential:
Pay TV	$	1,529,977	$	538,135	$	—		$	2,068,112	$	1,598,650	$	556,391	$	2,155,041
Broadband	889,777		524,046		—			1,413,823		801,532		467,006		1,268,538
Telephony	269,220		60,317		—			329,537		291,880		67,342		359,222
Business services and wholesale	470,935		199,543		—			670,478		459,508		183,553		643,061
Advertising	170,624		35,434		(8,578		)	197,480		143,934		36,928		180,862
Other	6,488		7,949		—			14,437		6,009		11,888		17,897
Total Revenue	$	3,337,021	$	1,365,424	$	(8,578	)	$	4,693,867	$	3,301,513	$	1,323,108	$	4,624,621

(a) Reflects revenue recognized by Cablevision from the sale of services to Cequel.

Capital Expenditures by Reportable Segment

Capital expenditures (cash basis) by reportable segment are presented below:



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Cablevision	$	170,356	$	141,166	$	337,157	$	325,565
Cequel	70,326		64,997		161,140		138,025
	$	240,682	$	206,163	$	498,297	$	463,590

DESCRIPTION OF BUSINESS AND RELATED MATTERS (Details)					1 Months Ended		6 Months Ended
DESCRIPTION OF BUSINESS AND RELATED MATTERS (Details)	Jun. 08, 2018 USD ($) shares	May 24, 2018 USD ($)	May 23, 2018 USD ($)	Jan. 08, 2018 USD ($)	Apr. 30, 2018 USD ($)	Jan. 31, 2018 USD ($)	Jun. 30, 2018 USD ($) segment shares	Dec. 31, 2017 shares
Description Of Business [Line Items]
Number of reportable business segments \| segment							2
Dividends		$ 2.035		$ 1,499,935,000			$ 1,499,935,000
Stock repurchase program authorized amount							$ 2,000,000,000
Payments to Acquire Businesses, Gross					$ 10,125,000
Dividends, Paid-in-kind	$ 0.672
Dividends Payable, Date of Record			$ 0.4163
Common Class A
Description Of Business [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest \| shares	489,384,523						492,812,285	246,982,292
Common Class B [Member]
Description Of Business [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest \| shares							247,684,443	490,086,674
Fees for Executive Services \| Affiliates
Description Of Business [Line Items]
Related party transaction, annual fee							$ 30,000,000
ATS Acquisition
Description Of Business [Line Items]
Entities under common control, percentage of voting interst acquired						70.00%
Entities under common control, consideration transferred						$ 1.00
Total Stockholders' Equity
Description Of Business [Line Items]
Dividends							1,499,935,000
Paid-in Capital
Description Of Business [Line Items]
Dividends							963,711,000
Retained Earnings
Description Of Business [Line Items]
Dividends							$ (536,224,000)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2018	Jun. 30, 2018
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adoption of ASU No. 2018-02	$ 2,163	$ 2,163
Accumulated Other Comprehensive Income (loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adoption of ASU No. 2018-02		$ (2,163)

CHANGE IN ACCOUNTING POLICIES AND ATS ACQUISITION - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jan. 01, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract liability		$ 138,165		$ 138,165		$ 117,679
Other operating expenses		575,749	$ 591,222	1,158,772	$ 1,199,366
Contract asset		24,358		24,358		24,329
Goodwill		$ 8,004,808		$ 8,004,808		8,019,861
Impact of ASC 606 \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract liability						6,978
Other operating expenses			(5,979)		(9,396)
Contract asset						24,329
Goodwill						0
ATS Acquisition \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other operating expenses			$ 8,566		$ 8,566
Goodwill						$ 23,101
Installation Services \| Impact of ASC 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect on retained earnings, net of tax	$ 5,093
Cumulative effect on retained earnings, tax	1,885
Commissions \| Impact of ASC 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect on retained earnings, net of tax	17,759
Cumulative effect on retained earnings, tax	$ 6,570

CHANGE IN ACCOUNTING POLICIES AND ATS ACQUISITION - Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and cash equivalents	$ 381,140	$ 329,848
Other current assets		573,751
Property, plant and equipment, net	5,694,812	6,023,826
Goodwill	8,004,808	8,019,861
Other assets, long-term		19,864,796
Total assets	33,914,517	34,812,082
Current liabilities	2,956,856	2,520,362
Deferred tax liability	4,716,681	4,769,286
Liabilities, long-term		21,786,391
Total liabilities	29,877,159	29,076,039
Redeemable equity	170,165	231,290
Paid-in capital	3,856,682	4,665,229
Retained earnings	6,191	840,636
Total stockholders' equity	3,867,193	5,504,753
Total liabilities and stockholders' equity	$ 33,914,517	34,812,082
As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and cash equivalents		273,329
Other current assets		580,231
Property, plant and equipment, net		6,063,829
Goodwill		7,996,760
Other assets, long-term		19,861,076
Total assets		34,775,225
Current liabilities		2,492,983
Deferred tax liability		4,775,115
Liabilities, long-term		21,779,997
Total liabilities		29,048,095
Redeemable equity		231,290
Paid-in capital		4,642,128
Retained earnings		854,824
Total stockholders' equity		5,495,840
Total liabilities and stockholders' equity		34,775,225
Impact of ASC 606 \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and cash equivalents		0
Other current assets		14,068
Property, plant and equipment, net		0
Goodwill		0
Other assets, long-term		10,261
Total assets		24,329
Current liabilities		6,978
Deferred tax liability		4,685
Liabilities, long-term		0
Total liabilities		11,663
Redeemable equity		0
Paid-in capital		0
Retained earnings		12,666
Total stockholders' equity		12,666
Total liabilities and stockholders' equity		24,329
ATS Acquisition \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and cash equivalents		56,519
Other current assets		(20,548)
Property, plant and equipment, net		(40,003)
Goodwill		23,101
Other assets, long-term		(6,541)
Total assets		12,528
Current liabilities		20,401
Deferred tax liability		(10,514)
Liabilities, long-term		6,394
Total liabilities		16,281
Redeemable equity		0
Paid-in capital		23,101
Retained earnings		(26,854)
Total stockholders' equity		(3,753)
Total liabilities and stockholders' equity		$ 12,528

CHANGE IN ACCOUNTING POLICIES AND ATS ACQUISITION - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue	$ 2,364,153	$ 2,322,362	$ 4,693,867	$ 4,624,621
Programming and other direct costs	795,127	758,694	1,582,488	1,517,046
Other operating expenses	575,749	591,222	1,158,772	1,199,366
Restructuring and other expense	9,691	12,388	13,278	89,317
Depreciation and amortization (including impairments)	648,527	706,790	1,291,232	1,315,514
Operating income	335,059	253,268	648,097	503,378
Other expense, net	(438,653)	(985,694)	(941,343)	(1,357,900)
Loss before income taxes	(103,594)	(732,426)	(293,246)	(854,522)
Income tax benefit	5,590	252,487	66,293	298,395
Net loss	$ (98,004)	(479,939)	$ (226,953)	(556,127)
As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		2,328,341		4,634,017
Programming and other direct costs		758,694		1,517,046
Other operating expenses		593,690		1,207,127
Restructuring and other expense		12,388		89,317
Depreciation and amortization (including impairments)		706,787		1,315,511
Operating income		256,782		505,016
Other expense, net		(980,640)		(1,350,970)
Loss before income taxes		(723,858)		(845,954)
Income tax benefit		249,068		294,976
Net loss		(474,790)		(550,978)
Impact of ASC 606 \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		(5,979)		(9,396)
Programming and other direct costs		0		0
Other operating expenses		(5,979)		(9,396)
Restructuring and other expense		0		0
Depreciation and amortization (including impairments)		0		0
Operating income		0		0
Other expense, net		0		0
Loss before income taxes		0		0
Income tax benefit		0		0
Net loss		0		0
Accounting Standards Update 2017-07 [Member] \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
Programming and other direct costs		0		0
Other operating expenses		(5,055)		(6,931)
Restructuring and other expense		0		0
Depreciation, Depletion And Amortization, Including Asset Impairment Charges		0		0
Operating income		5,055		6,931
Other expense, net		(5,055)		(6,931)
Loss before income taxes		0		0
Income tax benefit		0		0
Net loss		0		0
Pay TV
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		1,071,163		2,155,041
Pay TV \| As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		1,059,857		2,131,218
Pay TV \| Impact of ASC 606 \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		11,306		23,823
Pay TV \| Accounting Standards Update 2017-07 [Member] \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
Broadband
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		642,620		1,268,538
Broadband \| As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		629,416		1,241,185
Broadband \| Impact of ASC 606 \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		13,204		27,353
Broadband \| Accounting Standards Update 2017-07 [Member] \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
Telephony
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		178,261		359,222
Telephony \| As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		208,451		419,324
Telephony \| Impact of ASC 606 \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		(30,190)		(60,102)
Telephony \| Accounting Standards Update 2017-07 [Member] \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
Business services and wholesale
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		323,641		643,061
Business services and wholesale \| As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		323,940		643,531
Business services and wholesale \| Impact of ASC 606 \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		(299)		(470)
Business services and wholesale \| Accounting Standards Update 2017-07 [Member] \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
Advertising
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		97,501		180,862
Advertising \| As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		97,501		180,862
Advertising \| Impact of ASC 606 \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
Advertising \| Accounting Standards Update 2017-07 [Member] \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
Other
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		9,176		17,897
Other \| As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		9,176		17,897
Other \| Impact of ASC 606 \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
Other \| Accounting Standards Update 2017-07 [Member] \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
ATS Acquisition \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
Programming and other direct costs		0		0
Other operating expenses		8,566		8,566
Restructuring and other expense		0		0
Depreciation, Depletion And Amortization, Including Asset Impairment Charges		3		3
Operating income		(8,569)		(8,569)
Other expense, net		1		1
Loss before income taxes		(8,568)		(8,568)
Income tax benefit		3,419		3,419
Net loss		(5,149)		(5,149)
ATS Acquisition \| Pay TV \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
ATS Acquisition \| Broadband \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
ATS Acquisition \| Telephony \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
ATS Acquisition \| Business services and wholesale \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
ATS Acquisition \| Advertising \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		0		0
ATS Acquisition \| Other \| Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue		$ 0		$ 0

REVENUE AND CONTRACT ASSETS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Franchise fees and other taxes and fees	$ 63,362	$ 64,804	$ 127,192	$ 129,790
Minimum
Disaggregation of Revenue [Line Items]
Contract term			3 years
Maximum
Disaggregation of Revenue [Line Items]
Contract term			5 years

REVENUE AND CONTRACT ASSETS - Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Contract assets	$ 24,358	$ 24,329
Deferred revenue	$ 138,165	$ 117,679

SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017
Supplemental Cash Flow Elements [Abstract]
Payments of Dividends		$ 79,617	$ 1,499,935	$ 919,317
Debt Conversion, Converted Instrument, Amount			0	2,264,252
Continuing Operations:
Property and equipment accrued but unpaid			120,958	87,003
Notes payable issued to vendor for the purchase of equipment			44,466	0
Capital lease obligations			1,349	0
Leasehold improvements paid by landlord	$ 350
Supplemental Data:
Cash interest paid			732,231	1,000,276
Income taxes paid, net			$ 8,940	$ 19,442

RESTRUCTURING COSTS AND OTHER EXPENSE (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring Reserve [Roll Forward]
Accrual, beginning balance			$ 123,100
Restructuring charges		$ 12,246	7,516	$ 88,997
Payments and other			(71,545)
Accrual, ending balance	$ 59,071		59,071
Transaction costs	3,496	$ 142	5,762	$ 320
Severance and Other Employee Related Costs
Restructuring Reserve [Roll Forward]
Accrual, beginning balance			113,474
Restructuring charges			4,182
Payments and other			(65,692)
Accrual, ending balance	51,964		51,964
Facility Realignment and Other Costs
Restructuring Reserve [Roll Forward]
Accrual, beginning balance			9,626
Restructuring charges			3,334
Payments and other			(5,853)
Accrual, ending balance	7,107		7,107
Cablevision
Restructuring Reserve [Roll Forward]
Cumulative restructuring costs	315,319		315,319
Cequel
Restructuring Reserve [Roll Forward]
Cumulative restructuring costs	$ 68,696		$ 68,696

INTANGIBLE ASSETS - Summary of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 7,075,027		$ 7,075,027		$ 7,075,027
Accumulated Amortization	(2,466,442)		(2,466,442)		(2,008,573)
Net Carrying Amount	4,608,585		4,608,585		5,066,454
Amortization of Intangible Assets	226,052	$ 317,219	457,869	$ 555,238
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,970,884		5,970,884		5,970,884
Accumulated Amortization	(1,797,079)		(1,797,079)		(1,409,021)
Net Carrying Amount	4,173,805		4,173,805		4,561,863
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,067,083		1,067,083		1,067,083
Accumulated Amortization	(654,498)		(654,498)		(588,574)
Net Carrying Amount	412,585		412,585		478,509
Other amortizable intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	37,060		37,060		37,060
Accumulated Amortization	(14,865)		(14,865)		(10,978)
Net Carrying Amount	$ 22,195		$ 22,195		$ 26,082
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			5 years
Maximum \| Other amortizable intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life			15 years

INTANGIBLE ASSETS - Summary of Acquired Indefinite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 226,052	$ 317,219	$ 457,869	$ 555,238
Cable television franchises	13,020,081		13,020,081		$ 13,020,081
Goodwill	8,004,808		8,004,808		8,019,861
Total	21,024,889		21,024,889		21,039,942
Cablevision
Acquired Indefinite-lived Intangible Assets [Line Items]
Cable television franchises	8,113,575		8,113,575		8,113,575
Goodwill	5,866,108		5,866,108		5,866,120
Total	13,979,683		13,979,683		13,979,695
Cequel
Acquired Indefinite-lived Intangible Assets [Line Items]
Cable television franchises	4,906,506		4,906,506		4,906,506
Goodwill	2,138,700		2,138,700		2,153,741
Total	$ 7,045,206		$ 7,045,206		$ 7,060,247

INTANGIBLE ASSETS - Goodwill (Details) $ in Thousands	6 Months Ended
INTANGIBLE ASSETS - Goodwill (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 8,019,861
Adjustments to purchase accounting relating to Cablevision Acquisition	(12)
Goodwill, ending balance	8,004,808
As Reported
Goodwill [Roll Forward]
Goodwill, beginning balance	7,996,760
ATS Acquisition \| Restatement Adjustment
Goodwill [Roll Forward]
Goodwill, beginning balance	23,101
Suddenlink [Member]
Goodwill [Roll Forward]
Adjustments to purchase accounting relating to Cablevision Acquisition	$ (15,041)

DEBT - Credit Facilities Outstanding (Details) - USD ($)	Jun. 30, 2018	Jan. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Principal Amount	$ 5,722,350,000		$ 4,693,675,000
Credit facility, Carrying Value	5,679,632,000		4,643,523,000
Less: Current portion	53,900,000		42,650,000
Credit facility, noncurrent	$ 5,625,732,000		4,600,873,000
CSC Holdings Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Stated interest rate	0.00%
Principal Amount	$ 0		450,000,000
Credit facility, Carrying Value	0		425,488,000
Letters of credit outstanding	138,323,000
Line of credit facility, remaining borrowing capacity	$ 2,161,677,000
CSC Holdings Term Loan Facility \| Term Loan
Debt Instrument [Line Items]
Stated interest rate	4.32%
Principal Amount	$ 2,970,000,000	$ 1,500,000,000	2,985,000,000
Credit facility, Carrying Value	$ 2,953,265,000		2,967,818,000
CSC Holdings Incremental Term Loan Facility \| Term Loan
Debt Instrument [Line Items]
Stated interest rate	4.57%
Principal Amount	$ 1,500,000,000		0
Credit facility, Carrying Value	$ 1,482,214,000		0
Cequel Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Stated interest rate	0.00%
Principal Amount	$ 0		0
Credit facility, Carrying Value	0		0
Letters of credit outstanding	7,636,000
Line of credit facility, remaining borrowing capacity	$ 342,364,000
Cequel Term Loan Facility \| Term Loan
Debt Instrument [Line Items]
Stated interest rate	4.34%
Principal Amount	$ 1,252,350,000		1,258,675,000
Credit facility, Carrying Value	$ 1,244,153,000		$ 1,250,217,000

DEBT - Credit Facilities Narrative (Details) - USD ($)	1 Months Ended	6 Months Ended
DEBT - Credit Facilities Narrative (Details) - USD ($)	Jan. 31, 2018	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Line of Credit Facility [Line Items]
Proceeds from credit facility debt, net of discounts		$ 1,642,500,000	$ 4,977,425,000
Principal Amount		5,722,350,000		$ 4,693,675,000
Repayment of credit facility debt		621,325,000	$ 3,573,750,000
CSC Holdings Revolving Credit Facility \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Proceeds from credit facility debt, net of discounts	$ 150,000,000
Principal Amount		0		450,000,000
Repayment of credit facility debt	600,000,000
CSC Holdings Term Loan Facility \| Term Loan
Line of Credit Facility [Line Items]
Principal Amount	$ 1,500,000,000	$ 2,970,000,000		$ 2,985,000,000
Debt issued percentage of par	99.50%
CSC Holdings Term Loan Facility \| Term Loan \| Base Rate
Line of Credit Facility [Line Items]
basis spread on variable rate	1.50%
CSC Holdings Term Loan Facility \| Term Loan \| Eurodollar
Line of Credit Facility [Line Items]
basis spread on variable rate	2.50%

DEBT - Senior Guaranteed Notes and Senior Notes and Debentures (Details) - USD ($)		1 Months Ended		6 Months Ended
	Jun. 21, 2016	Apr. 30, 2018	Feb. 28, 2018	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Principal Amount				$ 5,722,350,000	$ 4,693,675,000
Carrying Amount				15,840,480,000	15,860,432,000
Less: current portion				1,035,212,000	507,744,000
Long-term debt				14,805,268,000	15,352,688,000
Senior Notes
Debt Instrument [Line Items]
Principal Amount				$ 16,239,245,000	16,289,245,000
Senior Notes \| 7.875% Notes due February 15, 2018
Debt Instrument [Line Items]
Interest Rate				7.875%
Principal Amount				$ 0	300,000,000
Carrying Amount				$ 0	301,184,000
Senior Notes \| CSC Holdings 7.625% Notes due July 15, 2018 [Member]
Debt Instrument [Line Items]
Interest Rate				7.625%
Principal Amount				$ 500,000,000	500,000,000
Carrying Amount				$ 500,600,000	507,744,000
Senior Notes \| 8.625% Notes due February 15, 2019
Debt Instrument [Line Items]
Interest Rate				8.625%
Principal Amount				$ 526,000,000	526,000,000
Carrying Amount				$ 534,611,000	541,165,000
Senior Notes \| 6.75% Notes due November 15, 2021
Debt Instrument [Line Items]
Interest Rate				6.75%
Principal Amount				$ 1,000,000,000	1,000,000,000
Carrying Amount				$ 964,587,000	960,146,000
Senior Notes \| 5.25% Notes due June 1, 2024
Debt Instrument [Line Items]
Interest Rate				5.25%
Principal Amount				$ 750,000,000	750,000,000
Carrying Amount				$ 666,063,000	660,601,000
Senior Notes \| 10.125% Notes due January 15, 2023
Debt Instrument [Line Items]
Interest Rate				10.125%
Principal Amount				$ 1,800,000,000	1,800,000,000
Carrying Amount				$ 1,779,609,000	1,777,914,000
Senior Notes \| Senior Notes due in 2025
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				100.00%
Senior Notes \| 10.875% Notes due October 15, 2025
Debt Instrument [Line Items]
Interest Rate				10.875%
Principal Amount				$ 1,684,221,000	1,684,221,000
Carrying Amount				$ 1,662,002,000	1,661,135,000
Senior Notes \| 6.625% Notes due October 15, 2025
Debt Instrument [Line Items]
Interest Rate				6.625%
Principal Amount				$ 1,000,000,000	1,000,000,000
Carrying Amount				$ 987,368,000	986,717,000
Senior Notes \| 5.5% Notes due April 15, 2027
Debt Instrument [Line Items]
Interest Rate				5.50%
Principal Amount				$ 1,310,000,000	1,310,000,000
Carrying Amount				$ 1,304,697,000	1,304,468,000
Debt Instrument, Redemption Price, Percentage				105.50%
Senior Notes \| 5.375% Notes Due February 1, 2028
Debt Instrument [Line Items]
Interest Rate				5.375%
Principal Amount				$ 1,000,000,000	0
Carrying Amount				$ 991,730,000	0
Debt Instrument, Redemption Price, Percentage				105.375%
Senior Notes \| 7.75% Notes due April 15, 2018
Debt Instrument [Line Items]
Interest Rate				7.75%
Principal Amount				$ 0	750,000,000
Carrying Amount				$ 0	754,035,000
Extinguishment of debt			$ 7,019,000
Senior Notes \| 8.0% Notes due April 15, 2020
Debt Instrument [Line Items]
Interest Rate				8.00%
Principal Amount				$ 500,000,000	500,000,000
Carrying Amount				$ 493,606,000	492,009,000
Senior Notes \| 5.875% Notes due September 15, 2022
Debt Instrument [Line Items]
Interest Rate				5.875%
Principal Amount				$ 649,024,000	649,024,000
Carrying Amount				$ 578,734,000	572,071,000
Senior Notes \| Cequel and Cequel Capital 6.375% Senior Notes due September 15, 2020 [Member]
Debt Instrument [Line Items]
Interest Rate				6.375%
Principal Amount				$ 0	1,050,000,000
Carrying Amount				$ 0	1,027,493,000
Extinguishment of debt		$ 16,737,000
Senior Notes \| 5.125% Senior Notes due December 15, 2021
Debt Instrument [Line Items]
Interest Rate				5.125%
Principal Amount				$ 1,250,000,000	1,250,000,000
Carrying Amount				$ 1,151,107,000	1,138,870,000
Senior Notes \| 7.75% Senior Notes due July 15, 2025
Debt Instrument [Line Items]
Interest Rate				7.75%
Principal Amount				$ 620,000,000	620,000,000
Carrying Amount				$ 605,143,000	604,374,000
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed				40.00%
Debt Instrument, Redemption Price, Percentage				107.75%
Senior Notes \| Cequel and Cequel Capital 7.5% Senior Notes due April 1, 2028 [Member] [Domain]
Debt Instrument [Line Items]
Interest Rate				7.50%
Principal Amount				$ 1,050,000,000	0
Carrying Amount				$ 1,048,185,000	0
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed				40.00%
Debt Instrument, Redemption Price, Percentage				107.50%
Senior Notes \| 5.375% Senior Notes due July 15, 2023
Debt Instrument [Line Items]
Interest Rate				5.375%
Principal Amount				$ 1,100,000,000	1,100,000,000
Carrying Amount				$ 1,083,846,000	1,082,482,000
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed				40.00%
Debt Instrument, Redemption Price, Percentage				105.375%
Senior Notes \| 5.5% Senior Notes due May 15, 2026
Debt Instrument [Line Items]
Interest Rate				5.50%
Principal Amount				$ 1,500,000,000	1,500,000,000
Carrying Amount				$ 1,488,592,000	$ 1,488,024,000
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed				40.00%
Debt Instrument, Redemption Price, Percentage				105.50%
Cablevision \| Senior Notes \| CSC Holdings Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed				40.00%
Adjustment to fair value	$ 52,788,000
Cablevision \| Senior Notes \| 10.125% Notes due January 15, 2023
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				110.125%
Cablevision \| Senior Notes \| 10.875% Notes due October 15, 2025
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				110.875%
Cablevision \| Senior Notes \| 6.625% Notes due October 15, 2025
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				106.625%

DEBT - Senior Guaranteed Notes and Senior Notes and Debentures Narrative (Details) - USD ($)			1 Months Ended		6 Months Ended
	May 24, 2018	Jan. 08, 2018	Apr. 30, 2018	Feb. 28, 2018	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Principal Amount					$ 5,722,350,000	$ 4,693,675,000
Dividends	$ 2.035	$ 1,499,935,000			1,499,935,000
Senior Notes
Debt Instrument [Line Items]
Principal Amount					$ 16,239,245,000	16,289,245,000
Senior Notes \| Cequel and Cequel Capital 7.5% Senior Notes due April 1, 2028 [Member] [Domain]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed					40.00%
Debt Instrument, Redemption Price, Percentage					107.50%
Principal Amount					$ 1,050,000,000	0
Interest Rate					7.50%
Senior Notes \| 5.375% Notes Due February 1, 2028
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage					105.375%
Principal Amount					$ 1,000,000,000	0
Interest Rate					5.375%
Senior Notes \| 7.875% Notes due February 15, 2018
Debt Instrument [Line Items]
Principal Amount					$ 0	300,000,000
Interest Rate					7.875%
Senior Notes \| 7.75% Notes due April 15, 2018
Debt Instrument [Line Items]
Principal Amount					$ 0	750,000,000
Interest Rate					7.75%
Extinguishment of debt				$ 7,019,000
Write Off Of Deferred Debt Issuance Cots and Unamortized Discount				$ 2,314,000
Senior Notes \| Cequel and Cequel Capital 6.375% Senior Notes due September 15, 2020 [Member]
Debt Instrument [Line Items]
Principal Amount					$ 0	$ 1,050,000,000
Interest Rate					6.375%
Extinguishment of debt			$ 16,737,000
Write Off Of Deferred Debt Issuance Cots and Unamortized Discount			$ 20,173,000

DEBT - Notes Payable to Affiliates and Related Perties (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Jun. 21, 2016
Debt Instrument [Line Items]
Principal Amount		$ 5,722,350,000		$ 4,693,675,000
Senior Notes
Debt Instrument [Line Items]
Principal Amount		$ 16,239,245,000		16,289,245,000
Cablevision \| Affiliates \| Notes payable
Debt Instrument [Line Items]
Principal Amount					$ 1,750,000,000
Interest payable					529,000
Debt premium					513,723,000
Interest expense	$ 42,817,000		$ 90,405,000
Cequel and Cequel Capital 7.5% Senior Notes due April 1, 2028 [Member] [Domain] \| Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage		107.50%
Principal Amount		$ 1,050,000,000		$ 0
Stated interest rate		7.50%
Notes Payable at 10.75% \| Cablevision \| Affiliates \| Notes payable
Debt Instrument [Line Items]
Principal Amount					$ 875,000,000
Stated interest rate					10.75%
Notes Payable at 11% \| Cablevision \| Affiliates \| Notes payable
Debt Instrument [Line Items]
Principal Amount					$ 875,000,000
Stated interest rate					11.00%
Organizational Transactions Prior to IPO
Debt Instrument [Line Items]
Stock issued	$ 2,264,252,000

DEBT - Summary of Debt Maturities (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Debt Instrument [Line Items]
2018	$ 552,511
2020	639,227
2021	561,275
2022	3,769,705
2021	708,643
Thereafter	17,279,589
Cablevision
Debt Instrument [Line Items]
2018	540,854
2020	595,243
2021	548,570
2022	2,506,990
2021	695,917
Thereafter	11,813,209
Cequel Corp. [Member]
Debt Instrument [Line Items]
2018	11,657
2020	43,984
2021	12,705
2022	1,262,715
2021	12,726
Thereafter	$ 5,466,380

DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS - Location of Assets and Liabilities Within the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Apr. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Number Of Shares Monetized	10,802,118
Derivative Instruments, Fair Value [Abstract]
Collateralized Indebtedness Settled	$ (337,148)
Payments for (Proceeds from) Derivative Instrument, Financing Activities	(24)
Derivative Contracts Settled	0
Proceeds from Issuance of Secured Debt	(337,124)	$ (490,816)
Net Cash Receipt Payment on Collateralized Indebtedness Settlement	337,124	$ 483,081
Not Designated as Hedging Instruments
Derivative Instruments, Fair Value [Abstract]
Asset Derivatives	110,999			$ 52,545
Liability Derivatives	(133,093)			(239,951)
Interest Rate Swap, Conversion, Incremental Term Loan Facility [Member] [Domain] [Domain] \| Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Derivative, fixed interest rate			0.226%
Prepaid forward contracts \| Not Designated as Hedging Instruments \| Current derivative contracts
Derivative Instruments, Fair Value [Abstract]
Asset Derivatives	9,623			52,545
Liability Derivatives	(9,623)			(52,545)
Prepaid forward contracts \| Not Designated as Hedging Instruments \| Long-term derivative contracts
Derivative Instruments, Fair Value [Abstract]
Asset Derivatives	101,007			0
Liability Derivatives	0			(109,504)
Interest Rate Swap \| Not Designated as Hedging Instruments \| Current derivative contracts
Derivative Instruments, Fair Value [Abstract]
Asset Derivatives	369			0
Interest Rate Swap \| Not Designated as Hedging Instruments \| Long-term liabilities under derivative contracts
Derivative Instruments, Fair Value [Abstract]
Liability Derivatives	$ (123,470)			$ (77,902)

DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS - Narrative (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Apr. 30, 2018 USD ($)	Jun. 30, 2016 USD ($) instrument
Derivative [Line Items]
Gain (loss) on investments and sale of affiliate interests, net	$ 58,420,000	$ 310,996,000
Interest Rate Swap, Conversion, Term Loan Facility [Member] [Domain] \| Not Designated as Hedging Instruments
Derivative [Line Items]
Derivative notional amount			$ 2,970,000,000
Interest Rate Swap, Conversion, Incremental Term Loan Facility [Member] [Domain] [Domain] \| Not Designated as Hedging Instruments
Derivative [Line Items]
Derivative notional amount			$ 1,496,250
Derivative, fixed interest rate			0.226%
Interest Rate Swap, Conversion, Term Loan Facility Cequel [Member] [Domain] [Domain] \| Not Designated as Hedging Instruments
Derivative [Line Items]
Derivative notional amount			$ 1,255,513,000
Derivative, fixed interest rate			0.225%
Interest Rate Swap
Derivative [Line Items]
Amount of gain (loss) recognized	12,929,000	44,851,000
Interest Rate Swap \| Not Designated as Hedging Instruments
Derivative [Line Items]
Number of derivative instruments held \| instrument				2
Interest Rate Swap, Conversion, Tranche One \| Not Designated as Hedging Instruments
Derivative [Line Items]
Derivative notional amount				$ 750,000,000
Derivative, fixed interest rate				1.6655%
Interest Rate Swap, Conversion, Tranche Two \| Not Designated as Hedging Instruments
Derivative [Line Items]
Derivative notional amount				$ 750,000,000
Derivative, fixed interest rate				1.68%
Prepaid forward contracts
Derivative [Line Items]
Amount of gain (loss) recognized	$ 42,159,000	$ 210,511,000

FAIR VALUE MEASUREMENT - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Fair Value Measured on a Recurring Basis - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Level III
Liabilities:
Contingent consideration related to 2017 acquisitions	$ 2,233	$ 32,233
Prepaid forward contracts \| Level II
Assets:
Derivative asset	110,630	52,545
Liabilities:
Derivative liability	9,623	162,049
Interest rate swap contracts \| Level II
Liabilities:
Derivative liability	123,470	77,902
Investment securities pledged as collateral \| Level I
Assets:
Investment securities	1,409,361	1,720,357
Money market funds \| Level I
Assets:
Cash and cash equivalents	$ 218,940	$ 5,949

FAIR VALUE MEASUREMENT - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	$ 22,985,277	$ 21,919,331
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	23,699,331	23,279,472
CSC Holdings \| Credit facility debt \| Carrying Amount \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	4,435,479	3,393,306
CSC Holdings \| Credit facility debt \| Estimated Fair Value \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	4,470,000	3,435,000
CSC Holdings \| Collateralized indebtedness \| Carrying Amount \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	1,392,648	1,349,474
CSC Holdings \| Collateralized indebtedness \| Estimated Fair Value \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	1,338,105	1,305,932
CSC Holdings \| Senior guaranteed notes \| Carrying Amount \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	3,283,795	2,291,185
CSC Holdings \| Senior guaranteed notes \| Estimated Fair Value \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	3,195,375	2,420,000
CSC Holdings \| Senior notes and debentures \| Carrying Amount \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	6,107,472	6,409,889
CSC Holdings \| Senior notes and debentures \| Estimated Fair Value \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	6,727,849	7,221,846
CSC Holdings \| Notes payable \| Carrying Amount \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	36,161	56,956
CSC Holdings \| Notes payable \| Estimated Fair Value \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	35,962	55,289
Cablevision \| Senior notes and debentures \| Carrying Amount \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	1,072,340	1,818,115
Cablevision \| Senior notes and debentures \| Estimated Fair Value \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	1,165,034	1,931,239
Cequel Corp. [Member] \| Credit facility debt \| Carrying Amount \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	1,244,153	1,250,217
Cequel Corp. [Member] \| Credit facility debt \| Estimated Fair Value \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	1,252,350	1,258,675
Cequel Corp. [Member] \| Senior notes and debentures \| Carrying Amount \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	2,804,435	2,770,737
Cequel Corp. [Member] \| Senior notes and debentures \| Estimated Fair Value \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	2,942,800	2,983,615
Cequel Corp. [Member] \| Notes payable \| Carrying Amount \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	36,356	8,946
Cequel Corp. [Member] \| Notes payable \| Estimated Fair Value \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	36,356	8,946
Cequel Corp. [Member] \| Senior secured notes \| Carrying Amount \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	2,572,438	2,570,506
Cequel Corp. [Member] \| Senior secured notes \| Estimated Fair Value \| Level II
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	$ 2,535,500	$ 2,658,930

FAIR VALUE MEASUREMENT - Narrative (Details) - Fourth Quarter Acquisitions, 2017 $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration related to 2017 acquisitions	$ 2,233
Contingent consideration, percent of contractual amount of acquisitions recognized	51.00%

INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
INCOME TAXES (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 5,590	$ 252,487	$ 66,293	$ 298,395
Effective tax rate (percent)	5.39%	34.00%	22.60%	35.00%
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 2,274,000		$ 2,274,000

SHARE BASED COMPENSATION - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Carry Unit Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase period following termination		60 days
Repurchase period following fourth anniversary		60 days
Carry unit plan, written promissory note period		3 years
Share-based Compensation Arrangement, Weighted Average Fair Value Per Unit	$ 2.14	$ 2.14	$ 2.50
Employee and Non-employee Share-based Compensation Expense	$ 7,993	$ 25,494
Carry Unit Awards [Member] \| Second Anniversary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage		50.00%
Carry Unit Awards [Member] \| Third Anniversary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage		25.00%
Carry Unit Awards [Member] \| Fourth Anniversary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage		25.00%
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee and Non-employee Share-based Compensation Expense	$ 4,233	$ 8,355

SHARE BASED COMPENSATION - Carrying Unit Award Activity (Details) - $ / shares	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Carry Unit Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 0.37
Share-based Compensation Arrangement, Weighted Average Fair Value Per Unit	2.14	$ 2.50
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)	0.71
Forfeited weighted average grant date fair value (in dollars per share)	0.60
Balance at End of period, weighted average grant date fair value (in dollars per share)	$ 0.94
Time Vesting Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	(43,462,500)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares)	168,550,001
Forfeited (in shares)	(7,375,001)
Ending balance (in shares)	117,712,500
Performance Based Vesting Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	0
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
Forfeited (in shares)	0
Ending balance (in shares)	10,000,000

SHARE BASED COMPENSATION - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Weighted Average Exercise Price Per Share:
Beginning balance, weighted average exercise price per share (in dollars per share		$ 19.48
Granted, weighted average exercise price per share (in dollars per share)		18.34
Forfeited, weighted average exercise price per share (in dollars per share		20.94
Ending balance, weighted average exercise price per share (in dollars per share	$ 19.10	19.10	$ 19.48
Options exercisable, weighted average exercise price per share (in dollars per share)	$ 0.00	$ 0.00
Weighted Average Remaining Contractual Term (in years)		9 years 3 months 20 days	9 years 11 months 19 days
Aggregate Intrinsic Value	$ (14,202)	$ (14,202)	$ 8,944
Carry Unit Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee and Non-employee Share-based Compensation Expense	7,993	25,494
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee and Non-employee Share-based Compensation Expense	$ 4,233	$ 8,355
Time Vesting
Shares Under Option (in shares):
Outstanding balance, beginning of period (in shares)		5,110,747
Granted (in shares)		1,943,676
Forfeited (in shares)		(179,705)
Outstanding balance, end of period (in shares)	6,874,718	6,874,718	5,110,747
Options exercisable (in shares)	0	0
Performance Based Vesting
Shares Under Option (in shares):
Outstanding balance, beginning of period (in shares)		0
Granted (in shares)		95,953
Forfeited (in shares)		(22,314)
Outstanding balance, end of period (in shares)	73,639	73,639	0
Options exercisable (in shares)	0	0

SHARE BASED COMPENSATION - Stock Options Valuation Assumptions (Details)	6 Months Ended
	Jun. 30, 2018 $ / shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free interest rate	2.75%
Expected life (in years)	6 years 5 months 27 days
Dividend yield	0.00%
Volatility	35.16%
Grant date fair value (in dollars per share)	$ 7.08

AFFILIATE AND RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended				6 Months Ended
	Apr. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Payments to Acquire Businesses, Gross	$ 10,125
Equity in net income (loss) from investment in related party						$ (10,849)	$ (4,122)
Related party expense		$ 9,244		$ 566,048		18,267	621,528
Payments to Acquire Other Investments						2,500	3,550
Fees for Executive Services \| Affiliates
Related Party Transaction [Line Items]
Related party transaction, annual fee		30,000				30,000
Related party expense		5,750		7,500		13,250	15,000
Equipment and Software Development Costs [Member] \| Affiliates
Related Party Transaction [Line Items]
Payments to Acquire Other Investments			$ 1,108	8,473		2,734	9,365
I24News and Altice NV 24/7
Related Party Transaction [Line Items]
Investment in affiliates and related parties								$ 1
Equity in net income (loss) from investment in related party				1		1,130	3
Newsday
Related Party Transaction [Line Items]
Investment in affiliates and related parties		0				0		$ 4
Equity in net income (loss) from investment in related party		407		0		9,719	2
Gainonsaleofequityinvestment						13,298
Other Operating Income (Expense) [Member] \| Transition Services [Member] \| Affiliates
Related Party Transaction [Line Items]
Related Party Transaction, Other Expenses from Transactions with Related Party		$ 505		$ 1,166		$ 999	964
Related Party Transaction, Other Revenues from Transactions with Related Party					$ 359		$ 841

AFFILIATE AND RELATED PARTY TRANSACTIONS - Revenue and Related Charges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Related Party Transactions [Abstract]
Revenue	$ 727	$ 253	$ 852	$ 394
Operating expenses:
Programming and other direct costs	(3,865)	(1,095)	(5,019)	(1,830)
Other operating expenses, net	(6,255)	(8,666)	(14,249)	(15,964)
Operating expenses, net	(10,120)	(9,761)	(19,268)	(17,794)
Related Party Transaction, Loss on Extinguishment of Debt of Deferred Financing Costs	0	(513,723)	0	(513,723)
Interest expense	0	(42,817)	0	(90,405)
RelatedPartyTransaction,MiscExpense	149		149
Net charges	(9,244)	(566,048)	(18,267)	(621,528)
Capital Expenditures	$ 1,108	$ 8,473	$ 2,734	$ 9,365

AFFILIATE AND RELATED PARTY TRANSACTIONS - Amounts Due From and Due to Related Parties (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Payments to Acquire Other Investments					$ 2,500	$ 3,550
Affiliates
Related Party Transaction [Line Items]
Due from related parties and affiliates		$ 17,612					$ 19,764
Due to related parties and affiliates		24,392					10,998
Affiliates \| Altice US Finance S.A.
Related Party Transaction [Line Items]
Due from related parties and affiliates		13,100					12,951
Affiliates \| Newsday
Related Party Transaction [Line Items]
Due from related parties and affiliates		2,581					2,713
Due to related parties and affiliates		42					33
Affiliates \| Altice Management Americas
Related Party Transaction [Line Items]
Due from related parties and affiliates		1,271					33
Affiliates \| I24
Related Party Transaction [Line Items]
Due from related parties and affiliates		0					4,036
Affiliates \| Altice Labs S.A.
Related Party Transaction [Line Items]
Due to related parties and affiliates		1,899					7,354
Affiliates \| Other Altice N.V. subsidiaries
Related Party Transaction [Line Items]
Due from related parties and affiliates		660					31
Due to related parties and affiliates		9,201					3,611
Affiliates \| Altice Management International
Related Party Transaction [Line Items]
Due to related parties and affiliates		13,250					$ 0
Equipment and Software Development Costs [Member] \| Affiliates
Related Party Transaction [Line Items]
Payments to Acquire Other Investments		$ 1,108	$ 8,473		2,734	9,365
Other Operating Income (Expense) [Member] \| Transition Services [Member] \| Affiliates
Related Party Transaction [Line Items]
Related Party Transaction, Other Expenses from Transactions with Related Party	$ 505		$ 1,166		$ 999	964
Related Party Transaction, Other Revenues from Transactions with Related Party				$ 359		$ 841

COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Estimated litigation liability	$ 6,000

SEGMENT INFORMATION - Narrative (Details)	6 Months Ended
SEGMENT INFORMATION - Narrative (Details)	Jun. 30, 2018 segment
Segment Reporting [Abstract]
Number of reportable business segments	2

SEGMENT INFORMATION - Reconciliation of Adjusted EBITDA to Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Operating Income (Loss) from Continuing Operations Before Income Taxes [Abstract]
Operating income	$ 335,059	$ 253,268	$ 648,097	$ 503,378
Share-based compensation expense	12,226	18,079	33,849	25,927
Restructuring and other expense	9,691	12,388	13,278	89,317
Depreciation and amortization (including impairments)	648,527	706,790	1,291,232	1,315,514
Adjusted EBITDA	1,005,503	990,525	1,986,456	1,934,136
Cablevision
Operating Income (Loss) from Continuing Operations Before Income Taxes [Abstract]
Operating income	203,265	109,799	373,958	231,843
Share-based compensation expense	10,357	11,960	26,529	17,042
Restructuring and other expense	8,515	11,171	11,598	69,818
Depreciation and amortization (including impairments)	473,138	542,203	958,502	985,379
Adjusted EBITDA	695,275	675,133	1,370,587	1,304,082
Cequel Corp. [Member]
Operating Income (Loss) from Continuing Operations Before Income Taxes [Abstract]
Operating income	131,794	143,469	274,139	271,535
Share-based compensation expense	1,869	6,119	7,320	8,885
Restructuring and other expense	1,176	1,217	1,680	19,499
Depreciation and amortization (including impairments)	175,389	164,587	332,730	330,135
Adjusted EBITDA	$ 310,228	$ 315,392	$ 615,869	$ 630,054

SEGMENT INFORMATION - Reconciliation of Reportable Segments to Consolidated Balances (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting [Abstract]
Operating income for reportable segments	$ 335,059	$ 253,268	$ 648,097	$ 503,378
Items excluded from operating income:
Interest expense	(390,543)	(420,370)	(767,801)	(853,664)
Interest income	5,313	180	8,416	412
Gain (loss) on investments and sale of affiliate interests, net	(45,113)	57,130	(293,715)	188,788
Gain (loss) on derivative contracts, net	42,159	(66,463)	210,511	(137,507)
Gain (loss) on interest rate swap contracts	(12,929)	9,146	(44,851)	11,488
Loss on extinguishment of debt and write-off of deferred financing costs (including $513,723 related to affiliates and related parties in 2017) (See Note 10)	(36,911)	(561,382)	(41,616)	(561,382)
Other expense, net	(629)	(3,935)	(12,287)	(6,035)
Loss before income taxes	$ (103,594)	$ (732,426)	$ (293,246)	$ (854,522)

SEGMENT INFORMATION - Summary of Revenue by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue from External Customer [Line Items]
Revenues	$ 2,364,153	$ 2,322,362	$ 4,693,867	$ 4,624,621
Pay TV
Revenue from External Customer [Line Items]
Revenues	1,034,404	1,071,163	2,068,112	2,155,041
Broadband
Revenue from External Customer [Line Items]
Revenues	712,202	642,620	1,413,823	1,268,538
Telephony
Revenue from External Customer [Line Items]
Revenues	163,499	178,261	329,537	359,222
Business services and wholesale
Revenue from External Customer [Line Items]
Revenues	337,388	323,641	670,478	643,061
Advertising
Revenue from External Customer [Line Items]
Revenues	109,898	97,501	197,480	180,862
Other
Revenue from External Customer [Line Items]
Revenues	6,762	9,176	14,437	17,897
Operating Segments \| Cablevision
Revenue from External Customer [Line Items]
Revenues	1,685,727	1,659,526	3,337,021	3,301,513
Operating Segments \| Cablevision \| Pay TV
Revenue from External Customer [Line Items]
Revenues	766,257	796,456	1,529,977	1,598,650
Operating Segments \| Cablevision \| Broadband
Revenue from External Customer [Line Items]
Revenues	449,426	405,199	889,777	801,532
Operating Segments \| Cablevision \| Telephony
Revenue from External Customer [Line Items]
Revenues	133,635	145,323	269,220	291,880
Operating Segments \| Cablevision \| Business services and wholesale
Revenue from External Customer [Line Items]
Revenues	236,763	230,964	470,935	459,508
Operating Segments \| Cablevision \| Advertising
Revenue from External Customer [Line Items]
Revenues	95,981	78,802	170,624	143,934
Operating Segments \| Cablevision \| Other
Revenue from External Customer [Line Items]
Revenues	3,665	2,782	6,488	6,009
Operating Segments \| Cequel Corp. [Member]
Revenue from External Customer [Line Items]
Revenues	682,875	662,836	1,365,424	1,323,108
Operating Segments \| Cequel Corp. [Member] \| Pay TV
Revenue from External Customer [Line Items]
Revenues	268,147	274,707	538,135	556,391
Operating Segments \| Cequel Corp. [Member] \| Broadband
Revenue from External Customer [Line Items]
Revenues	262,776	237,421	524,046	467,006
Operating Segments \| Cequel Corp. [Member] \| Telephony
Revenue from External Customer [Line Items]
Revenues	29,864	32,938	60,317	67,342
Operating Segments \| Cequel Corp. [Member] \| Business services and wholesale
Revenue from External Customer [Line Items]
Revenues	100,625	92,677	199,543	183,553
Operating Segments \| Cequel Corp. [Member] \| Advertising
Revenue from External Customer [Line Items]
Revenues	18,366	18,699	35,434	36,928
Operating Segments \| Cequel Corp. [Member] \| Other
Revenue from External Customer [Line Items]
Revenues	3,097	$ 6,394	7,949	$ 11,888
Eliminations
Revenue from External Customer [Line Items]
Revenues	(4,449)		(8,578)
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	(4,449)		(8,578)
Eliminations \| Other
Revenue from External Customer [Line Items]
Revenues	$ 0		$ 0

SEGMENT INFORMATION - Capital Expenditures by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information, Capital Expenditures [Abstract]
Capital expenditures	$ 240,682	$ 206,163	$ 498,297	$ 463,590
Cablevision
Segment Reporting Information, Capital Expenditures [Abstract]
Capital expenditures	170,356	141,166	337,157	325,565
Cequel Corp. [Member]
Segment Reporting Information, Capital Expenditures [Abstract]
Capital expenditures	$ 70,326	$ 64,997	$ 161,140	$ 138,025

SUBSEQUENT EVENT (Details) - USD ($)		1 Months Ended	6 Months Ended
SUBSEQUENT EVENT (Details) - USD ($)	Jul. 15, 2018	Apr. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Subsequent Event [Line Items]
Repayments of Senior Debt			$ 2,123,756,000	$ 979,280,000
Debt face amount			5,722,350,000		$ 4,693,675,000
Senior Notes
Subsequent Event [Line Items]
Debt face amount			16,239,245,000		16,289,245,000
CSC Holdings 7.625% Notes due July 15, 2018 [Member] \| Senior Notes
Subsequent Event [Line Items]
Debt face amount			$ 500,000,000		500,000,000
Stated interest rate			7.625%
CSC Holdings 7.625% Notes due July 15, 2018 [Member] \| Senior Notes \| Subsequent Event
Subsequent Event [Line Items]
Repayments of Senior Debt	$ 500,000,000
Cequel and Cequel Capital 6.375% Senior Notes due September 15, 2020 [Member] \| Senior Notes
Subsequent Event [Line Items]
Debt face amount			$ 0		$ 1,050,000,000
Stated interest rate			6.375%
Extinguishment of debt		$ 16,737,000