Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2021

Stockholders' Equity Note [Abstract]

Shares Repurchased Under Share Repurchase Program

A summary of shares repurchased under our stock repurchase program authorized by our Board of Directors follows:

	Three Months Ended
	March 31,
	2021		2020
Shares repurchased	3.8		2.5
Aggregate purchase price	$	306.1	$	80.0
Average purchase price per share	$	79.76	$	31.95

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 Ended
	March 31,
	2021		2020
Shares issued	0.4		0.1
Proceeds from the exercise of stock options	$	21.2	$	1.0
Average exercise price per share	$	50.57	$	18.12

Shares Issued And Shares Surrendered To Satisfy Tax Withholdings In Connection With Restricted Stock And 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 vesting of restricted stock and settlement of RSUs:

	Three Months Ended
	March 31,
	2021	2020
Shares issued	0.6	0.5
Shares surrendered to AutoNation to satisfy tax withholding obligations	0.2	0.2