Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

Stock option awards as of December 31, 2014 and March 31, 2015, and changes during the three months ended March 31, 2015, were as follows:

						Weighted
						Average
				Weighted		Remaining		Aggregate
				Average		Contractual		Intrinsic
	Shares Under Option			Exercise		Term		Value
	(Thousands)			Price		(Years)		(millions)
Outstanding at December 31, 2014		3,847		$	19.43		4.7	$	12.6
Exercised		(92	)		13.21
Outstanding at March 31, 2015		3,755			19.58		4.4		16.6
Vested and expected to vest at March 31, 2015		3,745			19.60		4.4		16.6
Exercisable at March 31, 2015		1,729		$	10.48		5.2	$	15.1

Nonvested Restricted Stock Unit Awards

Nonvested restricted stock unit awards as of December 31, 2014 and March 31, 2015, and changes during the three months ended March 31, 2015, were as follows:

				Weighted Average
	Shares			Grant Date
	(Thousands)			Fair Value
Nonvested at December 31, 2014		2,045		$	12.54
Granted		575			16.73
Vested		(880	)		12.94
Nonvested at March 31, 2015		1,740		$	13.71

Schedule of Nonvested Performance Share Units Activity

Nonvested performance share unit awards as of December 31, 2014 and March 31, 2015, and changes during the three months ended March 31, 2015, were as follows:

			Weighted Average
	Shares		Grant Date
	(Thousands)		Fair Value
Nonvested at December 31, 2014		804	$	11.87
Granted		418		16.73
Nonvested at March 31, 2015		1,222	$	13.53