Shareholders' Equity

6 Months Ended

Jun. 30, 2013

Stockholders' Equity Note [Abstract]

Shareholders' Equity

SHAREHOLDERS’ EQUITY

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

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2013		2012		2013		2012
Shares repurchased	0.1		3.7		0.1		15.4
Aggregate purchase price	$	2.7	$	126.2	$	4.9	$	531.6
Average purchase price per share	$	42.01	$	33.99	$	40.81	$	34.54

As of June 30, 2013, $314.3 million remained available under our stock repurchase authorization limit.

A summary of shares of common stock issued in connection with the exercise of stock options follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2013		2012		2013		2012
Shares issued	0.1		0.1		0.5		0.1
Proceeds from the exercise of stock options	$	2.7	$	1.4	$	10.6	$	1.7
Average exercise price per share	$	24.54	$	17.15	$	20.59	$	17.42

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		Six Months Ended
	June 30,		June 30,
	2013	2012	2013	2012
Shares issued	—	—	137,144	155,740
Shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the vesting of restricted stock	36,175	28,303	42,306	36,935