Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2016

Stockholders' Equity Note [Abstract]

Shares Repurchased Under Share Repurchase Program

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



	2016		2015		2014
Shares repurchased	10.5		3.9		9.4
Aggregate purchase price	$	497.0	$	235.1	$	485.1
Average purchase price per share	$	47.30	$	60.49	$	51.59

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:



	2016		2015		2014
Shares issued	0.3		1.3		1.7
Proceeds from the exercise of stock options	$	8.4	$	30.0	$	35.1
Average exercise price per share	$	31.21	$	23.33	$	20.50

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):



	2016	2015	2014
Shares issued	143,424	159,442	154,540
Shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the vesting of restricted stock	38,906	36,712	46,752