Stock Options (Tables)

3 Months Ended

Mar. 31, 2015

The fair value of stock option awards was estimated using the Black-Scholes option pricing model with the following assumptions and weighted-average fair values:


	Three Months Ended March 31,
	2015			2014
Weighted-average fair value of grant	$	9.12		$	11.28
Risk-free interest rate		1.28	%		1.04	%
Expected volatility		45.46	%		45.65	%
Expected life of options in years		4.92			3.71
Expected dividend yield		—			—

Summary of Stock Option Activity

A summary of stock option activity for the three months ended March 31, 2015 follows (shares in thousands):


Options	Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (years)		Aggregate Intrinsic Value ($ in millions)
Outstanding at December 31, 2014		2,816		$	29.51
Granted		651			23.81
Exercised		(181	)		19.53
Forfeited and expired		(442	)		35.00

Outstanding at March 31, 2015		2,844			27.99		3.45	$	1.7

Expected to vest at March 31, 2015		1,301			26.56		4.83		.4

Exercisable at March 31, 2015		1,469			29.37		2.11		1.3

Summary of Restricted Stock Unit Activity

A summary of restricted stock unit activity for the three months ended March 31, 2015 follows (shares in thousands):


	Restricted Stock Units			Weighted- Average Grant-Date Fair Value
Outstanding at December 31, 2014		354		$	28.81
Granted		384			23.01
Vested		(73	)		24.60
Forfeited and expired		(159	)		31.53

Outstanding at March 31, 2015		506			24.14