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Shareholders' Equity (Tables)
 9 Months Ended
Sep. 30, 2023
Stockholders' Equity Note [Abstract]  
Shares Repurchased Under Stock Repurchase Program
A summary of shares repurchased under our stock repurchase program authorized by our Board of Directors follows:
Three Months EndedNine Months Ended
 September 30,September 30,
 2023202220232022
Shares repurchased1.3 3.8 5.3 10.9 
Aggregate purchase price (1)
$200.0 $428.2 $712.4 $1,213.1 
Average purchase price per share$155.91 $113.51 $135.38 $110.96 
(1) Excludes excise tax accrual imposed under the Inflation Reduction Act of $2.0 million and $6.6 million for the three and nine months ended September 30, 2023, respectively.
Common Stock Issued With The Exercise Of Stock Options
A summary of shares of common stock issued in connection with the exercise of stock options follows:
Three Months EndedNine Months Ended
 September 30,September 30,
2023202220232022
Shares issued (in actual number of shares)7,000 16,570 37,996 71,030 
Proceeds from the exercise of stock options $0.4 $0.8 $1.9 $3.4 
Average exercise price per share$57.15 $48.15 $50.34 $47.94 
Shares Issued And Shares Surrendered To Satisfy Tax Withholdings In Connection With Restricted Stock Units
The following table presents a summary of shares of common stock issued in connection with the settlement of RSUs, as well as shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the settlement of RSUs:
Three Months EndedNine Months Ended
 September 30,September 30,
(In actual number of shares)2023202220232022
Shares issued987 1,227 531,994 775,312 
Shares surrendered to AutoNation to satisfy tax withholding obligations
278 570 182,527 263,521