Shareholders' Equity

9 Months Ended

Sep. 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				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Shares repurchased	—		—		0.1		15.4
Aggregate purchase price	$	—	$	—	$	4.9	$	531.6
Average purchase price per share	$	—	$	—	$	40.81	$	34.54

As of September 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				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Shares issued	0.5		1.1		1.0		1.2
Proceeds from the exercise of stock options	$	9.9	$	20.3	$	20.5	$	22.1
Average exercise price per share	$	20.32	$	18.56	$	20.46	$	18.46

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 or to pay for an option exercise (in actual number of shares):

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2013	2012	2013	2012
Shares issued	—	5,000	137,144	160,740
Shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the vesting of restricted stock or to pay for an option exercise	516	43,459	42,822	80,394