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Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2014

Employee Benefit and Other Plans [Abstract]

We recorded share-based compensation expense as follows:



	For the three months ended June 30,				For the six months ended June 30,
	2014		2013		2014		2013
	(in millions)
Share-based compensation expense	$	5.5	$	3.4	$	8.7	$	5.2

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award

Stock options: The following table summarizes information related to our common stock options:



	Number of Stock Options		Weighted Average Exercise Price
Options outstanding at January 1, 2014	5,509,246		$	14.01
Granted	711,380		$	23.47
Exercised	(302,078	)	$	13.03
Canceled or forfeited	(218,950	)	$	18.07
Options outstanding at June 30, 2014	5,699,598		$	15.11
Options exercisable at June 30, 2014	3,016,460		$	12.46
Expected to vest after June 30, 2014	2,041,655		$	18.43

Schedule of Stock Option Activity

The following information is provided for our stock options:



	For the six months ended June 30,
	2014		2013
Weighted-average grant date fair value	$	9.08	$	9.94

Schedule of Restricted Stock Units Activity

Restricted Stock Units: The following table summarizes information related to our restricted stock units:



	Number of Shares		Weighted Average Grant Date Fair Value
Unvested shares at January 1, 2014	629,518		$	20.11
Granted	424,678		$	23.60
Vested	(120,638	)	$	18.65
Canceled or forfeited	(62,190	)	$	21.93
Unvested shares at June 30, 2014	871,368		$	22.08

Schedule of Performance Stock Units Activity

Performance Stock Units: The following table summarizes information related to our performance stock units:



	Number of Shares	Weighted Average Grant Date Fair Value
Unvested shares at January 1, 2014	431,858	$	22.79
Granted	123,283	$	26.50
Canceled or forfeited	—	$	—
Unvested shares at June 30, 2014	555,141	$	23.61

- Definition

Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.

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