Equity-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

Share-based Compensation [Abstract]

Schedule of calculated fair value of options granted and major assumptions used

	Stock Option Assumptions
	Three Months Ended
	March 31, 2014
Weighted-average grant-date fair value of awards granted during the period	$	10.12
Weighted-average risk-free interest rate	1.31		%
Weighted-average expected price volatility	37.2		%
Expected dividend yield	0.25		%
Expected term in years at the date of grant	4.5

Summary of stock option transactions under the terms of LTSIP

Stock option transactions under the terms of the LTSIP are summarized below:

	Options Outstanding		Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value
			(per share)		(in years)	(in millions)
Outstanding at December 31, 2013	1,794,187		$	27.90
Granted	279,458		31.67
Exercised	(29,479	)	23.01
Outstanding at March 31, 2014	2,044,166		$	28.49	3.91	$	5.2
Options Exercisable at March 31, 2014	1,480,337		$	27.56	3.02	$	5.1
Unvested Options at March 31, 2014	563,829		$	30.93	6.24	$	0.1

Restricted Share Units Activity

	Restricted Shares Outstanding		Weighted- Average Grant-Date Fair Value
			(per share)
Unvested balance at December 31, 2013	1,388,953		$	30.96
Granted	844,552		31.69
Vested	(524,672	)	31.89
Forfeited	(18,170	)	31.28
Unvested balance at March 31, 2014	1,690,663		$	31.03

Schedule of Performance Share Units Activity

	Performance Share Units Outstanding		Weighted- Average Grant-Date Fair Value
Unvested balance at December 31, 2013	480,660		$	32.33
Granted	241,321		31.69
Vested and paid out	(55,659	)	39.07
Vested and canceled (1)	(51,361	)	39.07
Unvested balance at March 31, 2014	614,961		$	30.90