Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

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

Stock-Based Compensation Expense Recognized

Our stock-based compensation expense consists primarily of time-based and performance based stock options, restricted stock units and restricted stock awards that have been granted to management, other personnel and key service providers.  

Stock-Based Compensation Expense
	Three Months Ended March 31,
(In millions)	2014		2013
Amounts included in:
Corporate expense	$	6.8	$	0.7
Property, general, administrative, and other	19.6		2.9
Total stock-based compensation expense	$	26.4	$	3.6

Summary of Share-Based Option Activity

Stock Option Activity
	Shares		Weighted Average Exercise Price
Outstanding at December 31, 2013	8,463,811		$	12.09
Granted	—		—
Exercised	(77,527	)	11.53
Forfeited	(16,784	)	8.89
Expired	(3,830	)	14.73
Outstanding at March 31, 2014	8,365,670		$	12.08
Vested and expected to vest at March 31, 2014	8,033,454		$	11.89
Exercisable at March 31, 2014	2,966,899		$	14.02

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

Restricted Stock Unit Activity
	Units		Fair Value
Outstanding as of December 31, 2013	1,503,534		$	13.74
Granted	1,104		23.03
Canceled	(14,232	)	13.75
Vested	(371,151	)	13.71
Outstanding as of March 31, 2014	1,119,255		$	13.76