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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2022
Earnings Per Share [Abstract]  
Earnings Per Share The following is the computation of diluted earnings per common share for the three months ended March 31, 2022 and 2021.
Three Months Ended March 31,
20222021
Numerator:
Net income attributable to Charter shareholders$1,203 $807 
Effect of dilutive securities:
Charter Holdings convertible preferred units — 38 
Net income attributable to Charter shareholders after assumed conversions$1,203 $845 
Denominator:
Weighted average common shares outstanding, basic170,688,127 191,404,527 
Effect of dilutive securities:
Assumed exercise or issuance of shares relating to stock plans3,812,345 5,134,509 
Weighted average Charter Holdings convertible preferred units — 9,333,500 
Weighted average common shares outstanding, diluted174,500,472 205,872,536 
Basic earnings per common share attributable to Charter shareholders$7.05 $4.22 
Diluted earnings per common share attributable to Charter shareholders$6.90 $4.11