Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2017

Equity [Abstract]

Class of Treasury Stock

A summary of shares repurchased under the 2015 Repurchase Program, during the six months ended June 30, 2017 and cumulatively, is as follows:

2015 Repurchase Program	Shares	Cost of shares
		(In millions)
Repurchased during the three months ended June 30, 2017	—	$	—
Repurchased during the six months ended June 30, 2017	145,786	$	10.0
Cumulative repurchases as of June 30, 2017	1,000,657	$	82.9
Remaining dollar value of shares that may be repurchased	n/a	$	67.1