Stockholders' Equity and Share-Based Awards (Tables)

12 Months Ended

Dec. 31, 2015

A summary of the Company’s stock option activity in 2015 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		301.0		$	9.50
Granted		—			—
Exercised		(183.7	)		9.72
Cancelled		(1.7	)		9.00

Options outstanding, end of year (a)		115.6		$	9.16		0.7	$	4.5

(a)	All options outstanding are exercisable

Summary of Restricted Stock Activity

A summary of the Company’s restricted stock activity for 2015 is as follows:


	Shares (in thousands)
Outstanding as of December 31, 2014		7,214.1
Granted		2,290.0
Released/Vested		(2,280.4	)
Cancelled		(580.3	)

Outstanding as of December 31, 2015		6,643.4

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 2015, 2014 and 2013 is as follows:


(in millions)	2015		2014		2013
Total fair value of restricted shares granted	$	113.1	$	222.0	$	75.0
Total fair value of restricted shares vested		61.6		77.1		85.7

Restricted Stock 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 $52.05, $36.61 and $22.53 for 2015, 2014 and 2013, respectively, based on the following assumptions:


	2015			2014			2013
Expected volatility		26.0	%		32.0	%		40.7	%
Risk-free interest rates		1.8	%		1.7	%		0.8	%
Derived service periods (in years)		0.1			0.3			0.1