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Fair Value Measurements (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Carrying Value - Long-term and short-term combined $ 13,690 $ 12,856
Carrying Value 12,820 12,856
Interest rate derivatives designated as hedges 83 65
Weighted average pay rate for the Company's interest rate swap agreements (in hundredths) 2.25% 2.25%
CCH II debt [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Carrying Value - Long-term and short-term combined 1,290 1,692
Fair Value 1,247 1,713
CCO Holdings debt [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Carrying Value 8,226 6,241
Fair Value 8,866 6,630
Charter Operating debt [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Carrying Value 0 833
Fair Value 0 847
Credit facilities [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Carrying Value 4,174 4,090
Fair Value $ 4,312 $ 4,193