Consolidated Statements of Stockholders' Equity (Deficit) (unaudited) - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Deficit	Net Parent Investment	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning balance at Dec. 31, 2015	$ 474.1	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 598.3	$ (127.7)	$ 3.5
Beginning balance, shares at Dec. 31, 2015		0.0	0.0
Increase (Decrease) in Stockholders' Equity
Net (loss) income	48.8				40.9	7.2		0.7
Net transfer to parent	(676.5)					(676.5)
Issuance of common stock and reclassification of net parent investment in connection with Separation, shares		70.5
Issuance of common stock and reclassification of net parent investment in connection with Separation	0.0	$ 0.7			(71.7)	71.0
Issuance of common stock in connection with stock plans, shares		0.1
Share-based compensation	3.2				3.2
Exercise of stock options, shares		0.2
Exercise of stock options	2.5				2.5
Share repurchases, shares			0.1
Share repurchases	(1.7)		$ (1.7)
Other comprehensive income	0.2						0.0	0.2
Dividends and other changes in noncontrolling interest	(0.3)							(0.3)
Ending balance at Jun. 30, 2016	(149.7)	$ 0.7	$ (1.7)	0.0	(25.1)	$ 0.0	(127.7)	4.1
Ending balance, shares at Jun. 30, 2016		70.8	0.1
Beginning balance at Dec. 31, 2016	(139.0)	$ 0.7	$ (2.1)	11.0	(4.7)		(147.6)	3.7
Beginning balance, shares at Dec. 31, 2016		71.2	0.1
Increase (Decrease) in Stockholders' Equity
Net (loss) income	(21.5)				(21.6)			0.1
Issuance of common stock in connection with stock plans, shares		0.1
Issuance of common stock in connection with stock plans	0.1	$ 0.1
Share-based compensation	5.7			5.7
Exercise of stock options, shares		0.4
Exercise of stock options	6.2			6.2
Share repurchases	(1.0)		$ (1.0)
Other comprehensive income	16.2						16.2
Dividends and other changes in noncontrolling interest	(1.0)							(1.0)
Ending balance at Jun. 30, 2017	$ (134.3)	$ 0.8	$ (3.1)	$ 22.9	$ (26.3)		$ (131.4)	$ 2.8
Ending balance, shares at Jun. 30, 2017		71.7	0.1