Stock Options (Tables)

6 Months Ended

Jun. 30, 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:


	Six Months Ended June 30,
	2015			2014
Weighted-average fair value of grant	$	9.07		$	11.27
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 six months ended June 30, 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		712			23.61
Exercised		(190	)		19.53
Forfeited and expired		(502	)		34.24

Outstanding at June 30, 2015		2,836			27.86		3.25	$	.2

Expected to vest at June 30, 2015		1,308			26.46		4.68		—

Exercisable at June 30, 2015		1,460			29.25		1.86		.2

Summary of Restricted Stock Unit Activity

A summary of restricted stock unit activity for the six months ended June 30, 2015 follows (shares in thousands):


	Restricted Stock Units			Weighted- Average Grant-Date Fair Value
Outstanding at December 31, 2014		354		$	28.81
Granted		436			22.82
Vested		(81	)		23.87
Forfeited and expired		(187	)		30.46

Outstanding at June 30, 2015		522			23.98