Share-Based Compensation

3 Months Ended

Mar. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

A summary of share-based compensation is as follows:



	For the Three Months Ended March 31,
	2013		2014
Share-based compensation	$	5.8	$	6.5
Tax benefit	2.2		2.5

There was $79.3 million and $72.1 million of unrecognized share-based compensation as of December 31, 2013 and March 31, 2014, respectively, which will be recognized over a weighted-average period of approximately three years (assuming no forfeitures). As of March 31, 2014, 0.1 million options outstanding have expiration dates prior to the end of 2014.

Stock Options

The following table summarizes the transactions of the Company's stock options:



	Stock Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)
Unexercised options outstanding—December 31, 2013	3.0		$	77.71
Options exercised	(0.1	)	71.38
Options forfeited	(0.1	)	79.37
Unexercised options outstanding—March 31, 2014	2.8		77.90		3.2
Exercisable at March 31, 2014	2.3		73.80		3.0

Restricted Stock

The following table summarizes the transactions of the Company's restricted stock units:



	Restricted Stock		Weighted Average Grant Date Value
Unvested units—December 31, 2013	0.5		$	176.38
Units vested	(0.1	)	121.94
Units forfeited	0.0		94.83
Unvested units—March 31, 2014	0.4		182.44

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

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