Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 3,483	$ 551
Accounts receivable, net	2,227	1,733
Receivables from related party	0	0
Prepaid expenses and other current assets	761	446
Total current assets	6,471	2,730
RESTRICTED CASH	66	214
INVESTMENT IN CABLE PROPERTIES:
Property, plant and equipment, net	34,591	35,126
Customer relationships, net	7,453	9,565
Franchises	67,322	67,319
Goodwill	29,554	29,554
Total investment in cable properties, net	138,920	141,564
INVESTMENT IN SUBSIDIARIES	0	0
OPERATING LEASE RIGHT-OF-USE ASSETS	1,092
LOANS RECEIVABLE – RELATED PARTY	0	0
OTHER NONCURRENT ASSETS	1,639	1,622
Total assets	148,188	146,130
CURRENT LIABILITIES:
Accounts payable and accrued liabilities	8,671	8,805
Operating lease liabilities	214
Payables to related party	0	0
Current portion of long-term debt	3,500	3,290
Total current liabilities	12,385	12,095
LONG-TERM DEBT	75,578	69,537
LOANS PAYABLE – RELATED PARTY	0	0
DEFERRED INCOME TAXES	17,711	17,389
LONG-TERM OPERATING LEASE LIABILITIES	979
OTHER LONG-TERM LIABILITIES	2,724	2,837
SHAREHOLDERS’/MEMBER’S EQUITY
Controlling interest	31,445	36,285
Noncontrolling interests	7,366	7,987
Total shareholders’/member’s equity	38,811	44,272	$ 47,531	$ 50,366
Total liabilities and shareholders’/member’s equity	148,188	146,130
Eliminations
CURRENT ASSETS:
Cash and cash equivalents	0	0
Accounts receivable, net	0	0
Receivables from related party	(357)	(602)
Prepaid expenses and other current assets	0	0
Total current assets	(357)	(602)
RESTRICTED CASH	0	0
INVESTMENT IN CABLE PROPERTIES:
Property, plant and equipment, net	0	0
Customer relationships, net	0	0
Franchises	0	0
Goodwill	0	0
Total investment in cable properties, net	0	0
INVESTMENT IN SUBSIDIARIES	(180,699)	(193,082)
OPERATING LEASE RIGHT-OF-USE ASSETS	0
LOANS RECEIVABLE – RELATED PARTY	(1,504)	(1,451)
OTHER NONCURRENT ASSETS	0	(3)
Total assets	(182,560)	(195,138)
CURRENT LIABILITIES:
Accounts payable and accrued liabilities	0	0
Operating lease liabilities	0
Payables to related party	(357)	(602)
Current portion of long-term debt	0	0
Total current liabilities	(357)	(602)
LONG-TERM DEBT	0	0
LOANS PAYABLE – RELATED PARTY	(1,504)	(1,451)
DEFERRED INCOME TAXES	0	(3)
LONG-TERM OPERATING LEASE LIABILITIES	0
OTHER LONG-TERM LIABILITIES	0	0
SHAREHOLDERS’/MEMBER’S EQUITY
Controlling interest	(180,699)	(193,082)
Noncontrolling interests	0	0
Total shareholders’/member’s equity	(180,699)	(193,082)
Total liabilities and shareholders’/member’s equity	(182,560)	(195,138)
Charter
CURRENT ASSETS:
Cash and cash equivalents	0	0
Accounts receivable, net	1	1
Receivables from related party	34	27
Prepaid expenses and other current assets	10	14
Total current assets	45	42
RESTRICTED CASH	0	0
INVESTMENT IN CABLE PROPERTIES:
Property, plant and equipment, net	0	0
Customer relationships, net	0	0
Franchises	0	0
Goodwill	0	0
Total investment in cable properties, net	0	0
INVESTMENT IN SUBSIDIARIES	49,024	53,592
OPERATING LEASE RIGHT-OF-USE ASSETS	0
LOANS RECEIVABLE – RELATED PARTY	260	251
OTHER NONCURRENT ASSETS	2	0
Total assets	49,331	53,885
CURRENT LIABILITIES:
Accounts payable and accrued liabilities	18	9
Operating lease liabilities	0
Payables to related party	0	0
Current portion of long-term debt	0	0
Total current liabilities	18	9
LONG-TERM DEBT	0	0
LOANS PAYABLE – RELATED PARTY	0	0
DEFERRED INCOME TAXES	17,641	17,376
LONG-TERM OPERATING LEASE LIABILITIES	0
OTHER LONG-TERM LIABILITIES	227	215
SHAREHOLDERS’/MEMBER’S EQUITY
Controlling interest	31,445	36,285
Noncontrolling interests	0	0
Total shareholders’/member’s equity	31,445	36,285
Total liabilities and shareholders’/member’s equity	49,331	53,885
Intermediate Holding Companies
CURRENT ASSETS:
Cash and cash equivalents	234	251
Accounts receivable, net	31	33
Receivables from related party	264	518
Prepaid expenses and other current assets	40	32
Total current assets	569	834
RESTRICTED CASH	66	214
INVESTMENT IN CABLE PROPERTIES:
Property, plant and equipment, net	683	468
Customer relationships, net	0	0
Franchises	0	0
Goodwill	0	0
Total investment in cable properties, net	683	468
INVESTMENT IN SUBSIDIARIES	55,266	60,530
OPERATING LEASE RIGHT-OF-USE ASSETS	167
LOANS RECEIVABLE – RELATED PARTY	699	674
OTHER NONCURRENT ASSETS	211	222
Total assets	57,661	62,942
CURRENT LIABILITIES:
Accounts payable and accrued liabilities	695	893
Operating lease liabilities	30
Payables to related party	0	0
Current portion of long-term debt	0	0
Total current liabilities	725	893
LONG-TERM DEBT	0	0
LOANS PAYABLE – RELATED PARTY	0	0
DEFERRED INCOME TAXES	15	16
LONG-TERM OPERATING LEASE LIABILITIES	191
OTHER LONG-TERM LIABILITIES	363	478
SHAREHOLDERS’/MEMBER’S EQUITY
Controlling interest	49,024	53,592
Noncontrolling interests	7,343	7,963
Total shareholders’/member’s equity	56,367	61,555
Total liabilities and shareholders’/member’s equity	57,661	62,942
CCO Holdings
CURRENT ASSETS:
Cash and cash equivalents	500	0
Accounts receivable, net	0	0
Receivables from related party	59	57
Prepaid expenses and other current assets	0	0
Total current assets	559	57
RESTRICTED CASH	0	0
INVESTMENT IN CABLE PROPERTIES:
Property, plant and equipment, net	0	0
Customer relationships, net	0	0
Franchises	0	0
Goodwill	0	0
Total investment in cable properties, net	0	0
INVESTMENT IN SUBSIDIARIES	76,409	78,960
OPERATING LEASE RIGHT-OF-USE ASSETS	0
LOANS RECEIVABLE – RELATED PARTY	545	526
OTHER NONCURRENT ASSETS	0	0
Total assets	77,513	79,543
CURRENT LIABILITIES:
Accounts payable and accrued liabilities	296	283
Operating lease liabilities	0
Payables to related party	0	0
Current portion of long-term debt	0	0
Total current liabilities	296	283
LONG-TERM DEBT	21,951	18,730
LOANS PAYABLE – RELATED PARTY	0	0
DEFERRED INCOME TAXES	0	0
LONG-TERM OPERATING LEASE LIABILITIES	0
OTHER LONG-TERM LIABILITIES	0	0
SHAREHOLDERS’/MEMBER’S EQUITY
Controlling interest	55,266	60,530
Noncontrolling interests	0	0
Total shareholders’/member’s equity	55,266	60,530
Total liabilities and shareholders’/member’s equity	77,513	79,543
Charter Operating and Restricted Subsidiaries
CURRENT ASSETS:
Cash and cash equivalents	2,749	300
Accounts receivable, net	2,195	1,699
Receivables from related party	0	0
Prepaid expenses and other current assets	711	400
Total current assets	5,655	2,399
RESTRICTED CASH	0	0
INVESTMENT IN CABLE PROPERTIES:
Property, plant and equipment, net	33,908	34,658
Customer relationships, net	7,453	9,565
Franchises	67,322	67,319
Goodwill	29,554	29,554
Total investment in cable properties, net	138,237	141,096
INVESTMENT IN SUBSIDIARIES	0	0
OPERATING LEASE RIGHT-OF-USE ASSETS	925
LOANS RECEIVABLE – RELATED PARTY	0	0
OTHER NONCURRENT ASSETS	1,426	1,403
Total assets	146,243	144,898
CURRENT LIABILITIES:
Accounts payable and accrued liabilities	7,662	7,620
Operating lease liabilities	184
Payables to related party	357	602
Current portion of long-term debt	3,500	3,290
Total current liabilities	11,703	11,512
LONG-TERM DEBT	53,627	50,807
LOANS PAYABLE – RELATED PARTY	1,504	1,451
DEFERRED INCOME TAXES	55	0
LONG-TERM OPERATING LEASE LIABILITIES	788
OTHER LONG-TERM LIABILITIES	2,134	2,144
SHAREHOLDERS’/MEMBER’S EQUITY
Controlling interest	76,409	78,960
Noncontrolling interests	23	24
Total shareholders’/member’s equity	76,432	78,984
Total liabilities and shareholders’/member’s equity	$ 146,243	$ 144,898