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Common Stock (Notes)
9 Months Ended
Sep. 30, 2023
Common Stock [Abstract]  
Common Stock Common Stock
The following represents the Company's purchase of Charter Class A common stock and the effect on the consolidated statements of cash flows during the three and nine months ended September 30, 2023 and 2022.

Three Months Ended September 30, Nine Months Ended September 30,
2023202220232022
Shares$Shares$Shares$Shares$
Share buybacks 1,833,928 $776 5,006,943 $2,218 5,092,677 $1,963 17,597,370 $9,065 
Income tax withholding15,261 14,595 148,075 58 304,070 180 
Exercise cost94,111 43,916 147,903 273,399 
1,943,300 $783 5,065,454 $2,225 5,388,655 $2,021 18,174,839 $9,245 

Share buybacks above include shares of Charter Class A common stock purchased from Liberty Broadband Corporation (“Liberty Broadband”) as follows.

Three Months Ended September 30, Nine Months Ended September 30,
2023202220232022
Number of shares purchased— 1,724,540 120,149 4,952,224 
Amount of shares purchased$— $796 $42 $2,602 

As of September 30, 2023, Charter had remaining board authority to purchase an additional $672 million of Charter’s Class A common stock and/or Charter Holdings common units, excluding purchases from Liberty Broadband. The Company also withholds shares of its Class A common stock in payment of income tax withholding owed by employees upon vesting of equity awards as well as exercise costs owed by employees upon exercise of stock options.
In 2022, Charter’s board of directors approved the retirement of the then currently held treasury stock and those shares were retired as of December 31, 2022. The Company accounts for treasury stock using the cost method and includes treasury stock as a component of total shareholders’ equity.