Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2019

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,
	2019		2018
Shares repurchased	1.0		0.5
Aggregate purchase price	$	33.5	$	26.6
Average purchase price per share	$	34.34	$	48.38

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,
	2019		2018
Shares issued (in actual number of shares)	11,227		259,075
Proceeds from the exercise of stock options	$	0.3	$	13.3
Average exercise price per share	$	25.93	$	51.15

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,
(In actual number of shares)	2019	2018
Shares issued	233,130	112,824
Shares surrendered to AutoNation to satisfy tax withholding obligations	77,831	45,690