Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2015

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				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Shares repurchased	2.5		4.4		3.5		8.0
Aggregate purchase price	$	150.0	$	235.9	$	209.1	$	415.7
Average purchase price per share	$	59.83	$	53.15	$	60.54	$	51.98

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				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Shares issued	0.2		0.4		1.1		1.5
Proceeds from the exercise of stock options	$	5.4	$	7.5	$	24.1	$	29.6
Average exercise price per share	$	26.94	$	17.54	$	22.55	$	19.59

Restricted Stock Grants And Shares Surrendered to Satisfy Tax Withholdings

The following table presents a summary of shares of common stock issued in connection with grants of restricted stock and shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the vesting of restricted stock (in actual number of shares):

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2015	2014	2015	2014
Shares issued	2,360	4,020	159,442	153,900
Shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the vesting of restricted stock	500	1,788	36,427	46,265