Stockholders' Equity and Share-Based Awards (Tables)

12 Months Ended

Dec. 31, 2014

Summary of Stock Option Activity

A summary of the Company’s stock option activity in 2014 is as follows:

	Shares (in thousands)			Weighted Average Exercise Price		Weighted Average Remaining Life (years)		Total Intrinsic Value (in millions)
Options outstanding, beginning of year		533.6		$	9.65
Granted		—			—
Exercised		(232.6	)		9.83
Cancelled		—			—
Options outstanding, end of year (a)		301.0		$	9.50		1.4	$	11.6

(a) All options outstanding are exercisable

Summary of Restricted Stock Activity

A summary of the Company’s restricted stock activity for 2014 is as follows:

	Shares (in thousands)
Outstanding as of December 31, 2013		6,009.9
Granted		5,501.4
Released/Vested		(4,129.9	)
Cancelled		(167.3	)
Outstanding as of December 31, 2014		7,214.1

Total Fair Value of Restricted Shares Granted and Vested

The total fair value of restricted shares granted and total fair value of restricted shares vested for 2014, 2013 and 2012 is as follows:

(in millions)	2014		2013		2012
Total fair value of restricted shares granted	$	222.0	$	75.0	$	43.2
Total fair value of restricted shares vested		77.1		85.7		49.6

Restricted Shares With Common Stock Price Thresholds

Assumptions Used to Determine Weighted Average Grant Date Fair Value

For those restricted stock awards with common stock price thresholds, the weighted average grant date fair values of these awards were $36.61, $22.53 and $12.65 for 2014, 2013 and 2012, respectively, based on the following assumptions:

	2014			2013			2012
Expected volatility		32.0	%		40.7	%		45.8	%
Risk-free interest rates		1.7	%		0.8	%		0.9	%
Derived service periods (in years)		0.3			0.1			0.2