Condensed Consolidating Statements of Operations (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Condensed Consolidating Statements of Operations
REVENUES	$ 11,450			$ 10,892			$ 34,003	$ 32,403
COSTS AND EXPENSES:
Operating costs and expenses (exclusive of items shown separately below)	7,435			7,012			21,915	20,721
Depreciation and amortization	2,415			2,482			7,465	7,784
Other operating expenses, net	14			18			71	116
Total costs and expenses	9,864			9,512			29,451	28,621
Income from operations	1,586			1,380			4,552	3,782
OTHER INCOME (EXPENSES):
Interest income (expense), net	(963)			(901)			(2,833)	(2,630)
Gain (loss) on financial instruments, net	(34)			12			(116)	0
Other pension benefits, net	9			207			27	247
Other expense, net	(5)			(5)			(131)	(75)
Equity in income of subsidiaries							0	0
Total other income (expense)	(993)			(687)			(3,053)	(2,458)
Income before income taxes	593			693			1,499	1,324
Income tax expense	(126)			(109)			(329)	(178)
Consolidated net income	467	$ 386	$ 317	584	$ 339	$ 223	1,170	1,146
Less: Net income attributable to noncontrolling interests	(80)			(91)			(216)	(212)
Net income	$ 387			$ 493			954	934
Eliminations
Condensed Consolidating Statements of Operations
REVENUES							(913)	(868)
COSTS AND EXPENSES:
Operating costs and expenses (exclusive of items shown separately below)							(917)	(868)
Depreciation and amortization							0	0
Other operating expenses, net							4	0
Total costs and expenses							(913)	(868)
Income from operations							0	0
OTHER INCOME (EXPENSES):
Interest income (expense), net							0	0
Gain (loss) on financial instruments, net							0
Other pension benefits, net							0	0
Other expense, net							0	0
Equity in income of subsidiaries							(4,659)	(4,419)
Total other income (expense)							(4,659)	(4,419)
Income before income taxes							(4,659)	(4,419)
Income tax expense							0	0
Consolidated net income							(4,659)	(4,419)
Less: Net income attributable to noncontrolling interests							0	0
Net income							(4,659)	(4,419)
Charter
Condensed Consolidating Statements of Operations
REVENUES							39	37
COSTS AND EXPENSES:
Operating costs and expenses (exclusive of items shown separately below)							39	37
Depreciation and amortization							0	0
Other operating expenses, net							0	0
Total costs and expenses							39	37
Income from operations							0	0
OTHER INCOME (EXPENSES):
Interest income (expense), net							7	7
Gain (loss) on financial instruments, net							0
Other pension benefits, net							0	0
Other expense, net							0	0
Equity in income of subsidiaries							1,180	1,085
Total other income (expense)							1,187	1,092
Income before income taxes							1,187	1,092
Income tax expense							(233)	(158)
Consolidated net income							954	934
Less: Net income attributable to noncontrolling interests							0	0
Net income							954	934
Intermediate Holding Companies
Condensed Consolidating Statements of Operations
REVENUES							880	844
COSTS AND EXPENSES:
Operating costs and expenses (exclusive of items shown separately below)							843	810
Depreciation and amortization							12	8
Other operating expenses, net							(10)	4
Total costs and expenses							845	822
Income from operations							35	22
OTHER INCOME (EXPENSES):
Interest income (expense), net							25	21
Gain (loss) on financial instruments, net							0
Other pension benefits, net							0	0
Other expense, net							(2)	(26)
Equity in income of subsidiaries							1,347	1,286
Total other income (expense)							1,370	1,281
Income before income taxes							1,405	1,303
Income tax expense							(10)	(7)
Consolidated net income							1,395	1,296
Less: Net income attributable to noncontrolling interests							(215)	(211)
Net income							1,180	1,085
CCO Holdings
Condensed Consolidating Statements of Operations
REVENUES							0	0
COSTS AND EXPENSES:
Operating costs and expenses (exclusive of items shown separately below)							0	0
Depreciation and amortization							0	0
Other operating expenses, net							0	0
Total costs and expenses							0	0
Income from operations							0	0
OTHER INCOME (EXPENSES):
Interest income (expense), net							(785)	(762)
Gain (loss) on financial instruments, net							0
Other pension benefits, net							0	0
Other expense, net							0	0
Equity in income of subsidiaries							2,132	2,048
Total other income (expense)							1,347	1,286
Income before income taxes							1,347	1,286
Income tax expense							0	0
Consolidated net income							1,347	1,286
Less: Net income attributable to noncontrolling interests							0	0
Net income							1,347	1,286
Charter Operating and Restricted Subsidiaries
Condensed Consolidating Statements of Operations
REVENUES							33,997	32,390
COSTS AND EXPENSES:
Operating costs and expenses (exclusive of items shown separately below)							21,950	20,742
Depreciation and amortization							7,453	7,776
Other operating expenses, net							77	112
Total costs and expenses							29,480	28,630
Income from operations							4,517	3,760
OTHER INCOME (EXPENSES):
Interest income (expense), net							(2,080)	(1,896)
Gain (loss) on financial instruments, net							(116)
Other pension benefits, net							27	247
Other expense, net							(129)	(49)
Equity in income of subsidiaries							0	0
Total other income (expense)							(2,298)	(1,698)
Income before income taxes							2,219	2,062
Income tax expense							(86)	(13)
Consolidated net income							2,133	2,049
Less: Net income attributable to noncontrolling interests							(1)	(1)
Net income							$ 2,132	$ 2,048