CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Total	Retained Earnings	Non-Controlling Interest	Total	Redeemable Non-Controlling Interest
Balance, beginning period (in shares) at Dec. 31, 2013		48.6
Balance, beginning period at Dec. 31, 2013		$ 1,140.5	$ (30.1)	$ 49.4	$ 8.9	$ 1,168.7	$ 0.0
Increase (Decrease) in Equity [Roll Forward]
Net income (loss)	$ 64.5			61.4	3.1	64.5
Other comprehensive income, net of tax	(14.3)		(14.3)			(14.3)
Dividends paid on common stock				(8.3)		(8.3)
Distributions to noncontrolling interest					(1.1)	(1.1)
Share-based compensation		$ 4.9				4.9
Shares issued or repurchased, net (in shares)		0.2
Shares issued or repurchased, net		$ 0.6		(1.5)		(0.9)
Excess tax benefit from share-based awards		$ 1.3				1.3
Balance, period end (in shares) at Dec. 31, 2014		48.8
Balance, period end at Dec. 31, 2014		$ 1,147.3	(44.4)	101.0	10.9	1,214.8	0.0
Increase (Decrease) in Equity [Roll Forward]
Net income (loss)	31.1			29.6	1.1	30.7	0.4
Other comprehensive income, net of tax	(0.9)		(0.9)			(0.9)
Dividends paid on common stock				(10.3)		(10.3)
Reclassification of redeemable noncontrolling interest (Note 17)					(8.5)	(8.5)	8.5
Distributions to noncontrolling interest						0.0	(0.4)
Adjustments to redemption value of redeemable noncontrolling interest				(3.1)		(3.1)	3.1
Share-based compensation		$ 4.7				4.7
Shares issued or repurchased, net (in shares)		0.1
Shares issued or repurchased, net		$ (0.9)				(0.9)
Excess tax benefit from share-based awards		$ 0.6				0.6
Balance, period end (in shares) at Dec. 31, 2015		48.9
Balance, period end at Dec. 31, 2015	1,227.1	$ 1,151.7	(45.3)	117.2	3.5	1,227.1	11.6
Increase (Decrease) in Equity [Roll Forward]
Net income (loss)	(8.4)			(10.2)	0.4	(9.8)	1.4
Other comprehensive income, net of tax	2.1		2.1			2.1
Dividends paid on common stock				(12.3)		(12.3)
Distributions to noncontrolling interest						0.0	(0.9)
Adjustments to redemption value of redeemable noncontrolling interest				1.3		1.3	(1.3)
Share-based compensation		$ 4.1				4.1
Shares issued or repurchased, net (in shares)		0.1
Shares issued or repurchased, net		$ 1.5		(0.8)		0.7
Balance, period end (in shares) at Dec. 31, 2016		49.0
Balance, period end at Dec. 31, 2016	$ 1,213.2	$ 1,157.3	$ (43.2)	$ 95.2	$ 3.9	$ 1,213.2	$ 10.8