Carrying amount of Senior Notes and Senior Guaranteed Notes

No definition available.

Name:	atus_CarryingAmountOfSeniorNotesAndSeniorGuaranteedNotes
Namespace Prefix:	atus_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value of Credit Facility Debt

+ References

No definition available.

+ Details

Name:	atus_CarryingValueOfCreditFacilityDebt
Namespace Prefix:	atus_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face amount of Credit Facility Debt

+ References

No definition available.

+ Details

Name:	atus_FaceAmountOfCreditFacilityDebt
Namespace Prefix:	atus_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face Amount of Senior Notes and Senior Guaranteed Notes

+ References

No definition available.

+ Details

Name:	atus_FaceAmountOfSeniorNotesAndSeniorGuaranteedNotes
Namespace Prefix:	atus_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

+ Details

Name:	us-gaap_FinanceLeaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

+ Details

Name:	us-gaap_FinanceLeaseLiabilityCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-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=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

+ Details

Name:	us-gaap_LongTermDebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

+ Details

Name:	us-gaap_LongTermDebtNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Name:	us-gaap_RepaymentsOfLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16(a))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

Name:	us-gaap_SeniorNotes
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_LoansPayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_ShortTermDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_CreditFacilityDomain
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldingsRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_IncrementalTermLoanB3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_IncrementalTermLoanB5Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_LoansPayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldings6.625NotesdueOctober152025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldings5.5NotesdueApril152027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_A5.375SeniorGuaranteedNotesDueFebruary12028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldings5.375SeniorGuaranteedNotesdueJuly152023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldings5.500NotesdueMay152026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldings6500NotesDueFebruary12029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldings4125NotesDueDecember12030Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LongTermDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldings6.75NotesdueNovember152021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldingsCablevision5875NotesDueSeptember152022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldings5.25NotesdueJune12024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldingsCablevision7750NotesDueJuly152025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldings10.875NotesdueOctober152025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldings7.750NotesdueJuly152025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldings5750NotesDueJanuary152030Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldingsCablevision7500NotesDueApril12028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=atus_CSCHoldings7.500NotesdueApril12028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DEBT - Senior Guaranteed Notes and Senior Notes and Debentures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Debt Instrument [Line Items]
Principal amount	$ 26,499,564		$ 26,499,564		$ 24,773,440
Face Amount of Senior Notes and Senior Guaranteed Notes	17,382,497		17,382,497		15,657,497
Carrying amount of Senior Notes and Senior Guaranteed Notes	17,218,415		17,218,415		15,476,496
Face amount of Credit Facility Debt	7,161,563		7,161,563		7,190,438
Carrying value of Credit Facility Debt	7,122,458		7,122,458		7,148,287
Finance Lease, Liability	136,049		136,049		69,420
Long-term debt	26,185,687		26,185,687		24,420,285
Long-term Debt, Current Maturities	1,859,290		1,859,290		170,682
Finance Lease, Liability, Current	49,478		49,478		22,017
Long-term Debt, Excluding Current Maturities	24,326,397		24,326,397		24,249,603
Repayments of line of credit			228,875	$ 602,830
Loss on extinguishment of debt and write-off of deferred financing costs	0	$ (1,194)	0	$ (159,096)
Loans Payable
Debt Instrument [Line Items]
Principal amount	45,209		45,209		83,415
Long-term debt	45,209		45,209		83,415
Short-term Debt
Debt Instrument [Line Items]
Principal amount	1,882,883		1,882,883		170,682
Long-term Debt, Current Maturities	1,859,290		1,859,290		170,682
Credit Facility [Domain]
Debt Instrument [Line Items]
Principal amount	72,750		72,750		65,250
Long-term Debt, Current Maturities	72,750		72,750		65,250
CSC Holdings Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount	0		0		0
Line of Credit Facility, Maximum Borrowing Capacity	2,275,000		2,275,000
Credit facility	0		0		0
Incremental Term Loan B-3 \| Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 1,259,063		$ 1,259,063		1,265,438
Stated interest rate	2.435%		2.435%
Credit facility	$ 1,254,243		$ 1,254,243		1,260,200
Incremental Term Loan B-5 \| Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 2,992,500		$ 2,992,500		3,000,000
Stated interest rate	2.685%		2.685%
Credit facility	$ 2,970,328		$ 2,970,328		2,976,358
Loans Payable
Debt Instrument [Line Items]
Principal amount	119,889		119,889		156,519
Long-term debt	107,658		107,658		140,994
Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	1,699,566		1,699,566		1,699,566
Long-term debt	$ 1,601,107		$ 1,601,107		1,585,088
Secured Debt [Member] \| 6.625% Notes due October 15, 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.625%		6.625%
Principal amount	$ 1,000,000		$ 1,000,000		1,000,000
Carrying Amount	$ 990,233		$ 990,233		989,483
Secured Debt [Member] \| 5.5% Notes due April 15, 2027
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.50%		5.50%
Principal amount	$ 1,310,000		$ 1,310,000		1,310,000
Carrying Amount	$ 1,305,688		$ 1,305,688		1,305,430
Secured Debt [Member] \| 5.375% Senior Guaranteed Notes Due February 1, 2028
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.375%		5.375%
Principal amount	$ 1,000,000		$ 1,000,000		1,000,000
Carrying Amount	$ 993,116		$ 993,116		992,757
Secured Debt [Member] \| CSC Holdings 5.375% Senior Guaranteed Notes due July 15, 2023
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.375%		5.375%
Principal amount	$ 1,095,825		$ 1,095,825		1,095,825
Carrying Amount	$ 1,083,676		$ 1,083,676		1,081,879
Secured Debt [Member] \| CSC Holdings 5.500% Notes due May 15, 2026
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.50%		5.50%
Principal amount	$ 1,498,806		$ 1,498,806		1,498,806
Carrying Amount	$ 1,486,760		$ 1,486,760		1,485,911
Secured Debt [Member] \| CSC Holdings 6.500% Notes due February 1, 2029
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.50%		6.50%
Principal amount	$ 1,750,000		$ 1,750,000		1,750,000
Carrying Amount	$ 1,747,118		$ 1,747,118		1,746,996
Secured Debt [Member] \| CSC Holdings 4.125% Notes due December 1, 2030
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.125%		4.125%
Principal amount	$ 1,100,000		$ 1,100,000		0
Carrying Amount	1,095,311		1,095,311		0
Long-term Debt
Debt Instrument [Line Items]
Principal amount	24,616,681		24,616,681		24,602,758
Long-term Debt, Excluding Current Maturities	$ 24,326,397		$ 24,326,397		24,249,603
Senior Notes \| 6.75% Notes due November 15, 2021
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.75%		6.75%
Principal amount	$ 1,000,000		$ 1,000,000		1,000,000
Carrying Amount	$ 984,412		$ 984,412		979,178
Senior Notes \| 5.875% Notes due September 15, 2022
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.875%		5.875%
Principal amount	$ 649,024		$ 649,024		649,024
Carrying Amount	$ 608,861		$ 608,861		600,849
Senior Notes \| 5.25% Notes due June 1, 2024
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.25%		5.25%
Principal amount	$ 750,000		$ 750,000		750,000
Carrying Amount	$ 690,331		$ 690,331		683,940
Senior Notes \| CSC Holdings 7.750% Notes due July 15, 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.75%		7.75%
Principal amount	$ 1,740		$ 1,740		1,740
Carrying Amount	$ 1,698		$ 1,698		1,695
Senior Notes \| 10.875% Notes due October 15, 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	10.875%		10.875%
Principal amount	$ 1,684,221		$ 1,684,221		1,684,221
Carrying Amount	$ 1,666,435		$ 1,666,435		1,665,237
Senior Notes \| CSC Holdings 7.750% Notes due July 15, 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.75%		7.75%
Principal amount	$ 617,881		$ 617,881		617,881
Carrying Amount	$ 606,479		$ 606,479		605,583
Senior Notes \| CSC Holdings 5.750% Notes due January 15, 2030
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.75%		5.75%
Principal amount	$ 2,250,000		$ 2,250,000		2,250,000
Carrying Amount	$ 2,287,660		$ 2,287,660		2,289,168
Senior Notes \| CSC Holdings 7.500% Notes due April 1, 2028
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.50%		7.50%
Principal amount	$ 4,118		$ 4,118		4,118
Carrying Amount	$ 4,112		$ 4,112		4,112
Senior Notes \| CSC Holdings 7.500% Notes due April 1, 2028
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.50%		7.50%
Principal amount	$ 1,045,882		$ 1,045,882		1,045,882
Carrying Amount	$ 1,044,349		$ 1,044,349		$ 1,044,278