v3.26.1
SUPPLEMENTAL SCHEDULES (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Balance Sheet Related Disclosures [Abstract]                
Assets, Current $ 1,937,084       $ 1,937,084   $ 1,644,796  
Total assets 28,080,616       28,080,616   30,703,838  
Liabilities, Current 6,067,817       6,067,817   2,051,022  
Long-term debt, net of current maturities 22,402,928       22,402,928   26,145,372  
Total liabilities 33,082,559       33,082,559   32,996,066  
Noncontrolling interests 38,655       38,655   21,928  
Total liabilities and stockholders' deficiency 28,080,616       28,080,616   30,703,838  
Income Statement [Abstract]                
Revenue 2,023,703   $ 2,147,203   4,089,071 $ 4,299,485    
Costs and Expenses 1,857,654   1,836,080   6,283,111 3,644,904    
Operating Income (Loss), Total 166,049   311,123   (2,194,040) 654,581    
Nonoperating Income (Expense) (486,849)   (446,756)   (1,048,844) (877,449)    
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total (320,800)   (135,633)   (3,242,884) (222,868)    
Income Tax Expense (Benefit) 38,671   47,647   83,779 63,611    
Net loss (282,129)   (87,986)   (3,159,105) (159,257)    
Net Income (Loss) Attributable to Noncontrolling Interest (9,632) $ (7,095) (8,265) $ (4,405) (16,727) (12,670)    
Net loss attributable to CSC Holdings, LLC sole member (291,761) (2,884,071) (96,251) (75,676) (3,175,832) (171,927)    
Indefinite-lived cable franchise rights impairment 0   0   2,700,000 0    
CSC Holdings Restricted Group [Member]                
Balance Sheet Related Disclosures [Abstract]                
Assets, Current 994,485       994,485      
Assets, long term 7,437,843       7,437,843      
Total assets 8,432,328       8,432,328      
Liabilities, Current 5,170,018       5,170,018      
Long-term debt, net of current maturities 17,841,450       17,841,450      
Liabilities, Other than Long-Term Debt, Noncurrent 1,084,715       1,084,715      
Total liabilities 24,096,183       24,096,183      
Membership equity before noncontrolling interest (15,663,855)       (15,663,855)      
Noncontrolling interests 8,432,328       8,432,328      
Income Statement [Abstract]                
Revenue 689,141   748,845   1,414,908 1,498,034    
Costs and Expenses 766,842   691,130   3,053,431 1,395,817    
Operating Income (Loss), Total (77,701)   57,715   (1,638,523) 102,217    
Nonoperating Income (Expense) (375,754)   (424,683)   (734,571) (830,538)    
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total (453,455)   (366,968)   (2,373,094) (728,321)    
Income Tax Expense (Benefit) 108,622   130,600   166,146 214,032    
Net loss (344,833)   (236,368)   (2,206,948) (514,289)    
Indefinite-lived cable franchise rights impairment         1,618,489      
CSC Holdings                
Balance Sheet Related Disclosures [Abstract]                
Assets, Current 1,934,434       1,934,434   1,637,032  
Total assets 28,089,200       28,089,200   30,707,938  
Liabilities, Current 6,129,506       6,129,506   2,115,540  
Long-term debt, net of current maturities 22,402,928       22,402,928   26,145,372  
Total liabilities 33,101,804       33,101,804   33,012,988  
Noncontrolling interests 38,655       38,655   21,928  
Limited Liability Company (LLC) Members' Equity, Including Portion Attributable to Noncontrolling Interest (5,521,198) (5,179,878) (635,807) (531,476) (5,521,198) (635,807) (2,305,050) $ (459,620)
Total liabilities and stockholders' deficiency 28,089,200       28,089,200   $ 30,707,938  
Income Statement [Abstract]                
Revenue 2,023,703   2,147,203   4,089,071 4,299,485    
Costs and Expenses 1,859,338   1,840,822   6,286,562 3,651,165    
Operating Income (Loss), Total 164,365   306,381   (2,197,491) 648,320    
Nonoperating Income (Expense) (488,121)   (448,159)   (1,051,401) (880,267)    
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total (323,756)   (141,778)   (3,248,892) (231,947)    
Income Tax Expense (Benefit) 39,292   48,760   85,041 65,212    
Net loss (284,464)   (93,018)   (3,163,851) (166,735)    
Net Income (Loss) Attributable to Noncontrolling Interest (9,632) (7,095) (8,265) (4,405) (16,727) (12,670)    
Net loss attributable to CSC Holdings, LLC sole member $ (294,096) $ (2,886,482) $ (101,283) $ (78,122) (3,180,578) (179,405)    
Indefinite-lived cable franchise rights impairment         $ 2,700,000 $ 0