Stockholders' Equity (Table)

12 Months Ended

Dec. 31, 2014

Stockholders' Equity

Summary of share repurchases

		Amount Authorized by Board (Shares in millions)				Shares Remaining Under Board Authorization (millions)		Shares Repurchased Under Board Authorization
				Total Shares Repurchased (millions)
	Expiration Date
Repurchase Program Authorization Date								2014		2013		2012
October 2011	none		4.0		4.0		—		—		1.5		2.5
May 2013	none		4.0		3.2		0.8		2.7		0.5		—
October 2014	none		4.0		—		4.0		—		—		—
Total shares repurchased under authorization									2.7		2.0		2.5
Cost (millions)								$	48.2	$	28.2	$	23.5
Average share price								$	18.03	$	14.05	$	9.50