Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 694	$ 1,535	$ 555	$ 5
Accounts receivable, net	1,489	1,432
Receivables from related party	0	0
Prepaid expenses and other current assets	381	333
Total current assets	2,564	3,300
INVESTMENT IN CABLE PROPERTIES:
Property, plant and equipment, net	32,948	32,963
Customer relationships, net	13,231	14,608
Franchises	67,316	67,316
Goodwill	29,554	29,509
Total investment in cable properties, net	143,049	144,396
INVESTMENT IN SUBSIDIARIES	0	0
LOANS RECEIVABLE - RELATED PARTY	0	0
OTHER NONCURRENT ASSETS	1,347	1,371
Total assets	146,960	149,067
CURRENT LIABILITIES:
Accounts payable and accrued liabilities	8,123	7,544
Payables to related party	0	0
Current portion of long-term debt	0	2,028
Total current liabilities	8,123	9,572
LONG-TERM DEBT	63,248	59,719
LOANS PAYABLE - RELATED PARTY	0	0
DEFERRED INCOME TAXES	26,574	26,665
OTHER LONG-TERM LIABILITIES	2,582	2,745
SHAREHOLDERS'/MEMBER'S EQUITY
Controlling interest	36,628	40,139
Noncontrolling interests	9,805	10,227
Total shareholders'/member's equity	46,433	50,366
Total liabilities and shareholders'/member's equity	146,960	149,067
Eliminations [Member]
CURRENT ASSETS:
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Receivables from related party	(636)	(683)
Prepaid expenses and other current assets	0	0
Total current assets	(636)	(683)
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	(222,216)	(231,290)
LOANS RECEIVABLE - RELATED PARTY	(1,344)	(1,134)
OTHER NONCURRENT ASSETS	0	0
Total assets	(224,196)	(233,107)
CURRENT LIABILITIES:
Accounts payable and accrued liabilities	0	0
Payables to related party	(636)	(683)
Current portion of long-term debt		0
Total current liabilities	(636)	(683)
LONG-TERM DEBT	0	0
LOANS PAYABLE - RELATED PARTY	(1,344)	(1,134)
DEFERRED INCOME TAXES	0	0
OTHER LONG-TERM LIABILITIES	0	0
SHAREHOLDERS'/MEMBER'S EQUITY
Controlling interest	(222,216)	(231,290)
Noncontrolling interests	0	0
Total shareholders'/member's equity	(222,216)	(231,290)
Total liabilities and shareholders'/member's equity	(224,196)	(233,107)
Charter [Member]
CURRENT ASSETS:
Cash and cash equivalents	23	57	6	0
Accounts receivable, net	46	34
Receivables from related party	0	170
Prepaid expenses and other current assets	0	0
Total current assets	69	261
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	63,084	66,692
LOANS RECEIVABLE - RELATED PARTY	178	0
OTHER NONCURRENT ASSETS	0	0
Total assets	63,331	66,953
CURRENT LIABILITIES:
Accounts payable and accrued liabilities	14	22
Payables to related party	19	0
Current portion of long-term debt		0
Total current liabilities	33	22
LONG-TERM DEBT	0	0
LOANS PAYABLE - RELATED PARTY	0	0
DEFERRED INCOME TAXES	26,513	26,637
OTHER LONG-TERM LIABILITIES	157	155
SHAREHOLDERS'/MEMBER'S EQUITY
Controlling interest	36,628	40,139
Noncontrolling interests	0	0
Total shareholders'/member's equity	36,628	40,139
Total liabilities and shareholders'/member's equity	63,331	66,953
Intermediate Holding Companies [Member]
CURRENT ASSETS:
Cash and cash equivalents	150	154	124	0
Accounts receivable, net	27	11
Receivables from related party	585	451
Prepaid expenses and other current assets	62	33
Total current assets	824	649
INVESTMENT IN CABLE PROPERTIES:
Property, plant and equipment, net	237	245
Customer relationships, net	0	0
Franchises	0	0
Goodwill	0	0
Total investment in cable properties, net	237	245
INVESTMENT IN SUBSIDIARIES	71,843	75,838
LOANS RECEIVABLE - RELATED PARTY	655	640
OTHER NONCURRENT ASSETS	215	214
Total assets	73,774	77,586
CURRENT LIABILITIES:
Accounts payable and accrued liabilities	782	625
Payables to related party	0	0
Current portion of long-term debt		0
Total current liabilities	782	625
LONG-TERM DEBT	0	0
LOANS PAYABLE - RELATED PARTY	0	0
DEFERRED INCOME TAXES	22	3
OTHER LONG-TERM LIABILITIES	105	64
SHAREHOLDERS'/MEMBER'S EQUITY
Controlling interest	63,084	66,692
Noncontrolling interests	9,781	10,202
Total shareholders'/member's equity	72,865	76,894
Total liabilities and shareholders'/member's equity	73,774	77,586
CCO Holdings [Member]
CURRENT ASSETS:
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Receivables from related party	51	62
Prepaid expenses and other current assets	0	0
Total current assets	51	62
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	87,289	88,760
LOANS RECEIVABLE - RELATED PARTY	511	494
OTHER NONCURRENT ASSETS	0	0
Total assets	87,851	89,316
CURRENT LIABILITIES:
Accounts payable and accrued liabilities	267	219
Payables to related party	0	0
Current portion of long-term debt		0
Total current liabilities	267	219
LONG-TERM DEBT	15,741	13,259
LOANS PAYABLE - RELATED PARTY	0	0
DEFERRED INCOME TAXES	0	0
OTHER LONG-TERM LIABILITIES	0	0
SHAREHOLDERS'/MEMBER'S EQUITY
Controlling interest	71,843	75,838
Noncontrolling interests	0	0
Total shareholders'/member's equity	71,843	75,838
Total liabilities and shareholders'/member's equity	87,851	89,316
Charter Operating and Restricted Subsidiaries [Member]
CURRENT ASSETS:
Cash and cash equivalents	521	1,324	$ 425	$ 5
Accounts receivable, net	1,416	1,387
Receivables from related party	0	0
Prepaid expenses and other current assets	319	300
Total current assets	2,256	3,011
INVESTMENT IN CABLE PROPERTIES:
Property, plant and equipment, net	32,711	32,718
Customer relationships, net	13,231	14,608
Franchises	67,316	67,316
Goodwill	29,554	29,509
Total investment in cable properties, net	142,812	144,151
INVESTMENT IN SUBSIDIARIES	0	0
LOANS RECEIVABLE - RELATED PARTY	0	0
OTHER NONCURRENT ASSETS	1,132	1,157
Total assets	146,200	148,319
CURRENT LIABILITIES:
Accounts payable and accrued liabilities	7,060	6,678
Payables to related party	617	683
Current portion of long-term debt		2,028
Total current liabilities	7,677	9,389
LONG-TERM DEBT	47,507	46,460
LOANS PAYABLE - RELATED PARTY	1,344	1,134
DEFERRED INCOME TAXES	39	25
OTHER LONG-TERM LIABILITIES	2,320	2,526
SHAREHOLDERS'/MEMBER'S EQUITY
Controlling interest	87,289	88,760
Noncontrolling interests	24	25
Total shareholders'/member's equity	87,313	88,785
Total liabilities and shareholders'/member's equity	$ 146,200	$ 148,319