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Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Earnings Per Share [Abstract]        
Antidilutive securities excluded from computation of earnings per share (in shares) 18,000,000 19,000,000 18,000,000 20,000,000
Net income attributable to Charter shareholders $ 1,255 $ 1,185 $ 3,499 $ 3,859
Weighted average common shares outstanding, basic (shares) 149,004,322 157,971,109 150,169,275 164,189,703
Assumed exercise or issuance of shares relating to stock plans 3,014,837 2,667,077 2,325,998 3,162,074
Weighted average common shares outstanding, diluted (shares) 152,019,159 160,638,186 152,495,273 167,351,777
Basic earnings per common share attributable to Charter shareholders (dollars per share) $ 8.42 $ 7.51 $ 23.30 $ 23.51
Diluted earnings per common share attributable to Charter shareholders (dollars per share) $ 8.25 $ 7.38 $ 22.94 $ 23.06