Consolidated Statements of Equity - USD ($) $ in Millions	Total		2010 Equity Incentive Plan	Common Shares	Common Shares 2010 Equity Incentive Plan	Additional Paid-in- Capital	Additional Paid-in- Capital 2010 Equity Incentive Plan	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss	Non- Controlling Interests
Balance at Dec. 31, 2016	$ 873.8			$ 909.3		$ 54.2		$ 22.9	$ (117.9)	$ 5.3
Balance (in shares) at Dec. 31, 2016				138,591,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares repurchased and canceled	(1.8)			$ (1.8)
Common shares repurchased and canceled (in shares)				(151,000)
Common shares issued - Equity Incentive Plan			$ 0.0		$ 3.6		$ (3.6)
Common shares issued - Equity Incentive Plan (in shares)					496,000
Common shares issued - Dividend Reinvestment Plan	0.3			$ 0.3
Common shares issued - Dividend Reinvestment Plan (in shares)				22,000
Common shares issued - Employee Stock Purchase Plan	0.5			$ 0.6		(0.1)
Common shares issued - Employee Stock Purchase Plan (in shares)				74,000
Share-based compensation	10.9					10.9
Common shares dividends	(16.7)							(16.7)
Distributions to non-controlling interests	(1.8)									(1.8)
Comprehensive income (loss)
Currency translation adjustment	22.2								22.2
Pension benefit plan, net of tax	(0.2)	[1],[2]							(0.2)
Loss on derivative instruments, net of tax	(1.0)	[3]							(1.0)
Net (loss) income	(56.7)							(61.0)		4.3
Balance at Jul. 01, 2017	829.5			$ 912.0		61.4		(54.8)	(96.9)	7.8
Balance (in shares) at Jul. 01, 2017				139,032,000
Balance at Dec. 30, 2017	$ 885.7			$ 917.1		69.1		(12.2)	(94.4)	6.1
Balance (in shares) at Dec. 30, 2017	139,488,805			139,489,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares repurchased and canceled	$ (21.7)			$ (12.3)				(9.4)
Common shares repurchased and canceled (in shares)				(1,356,000)
Common shares issued - Equity Incentive Plan			$ 3.3		$ 12.8		$ (9.5)
Common shares issued - Equity Incentive Plan (in shares)					1,241,000
Common shares issued - Dividend Reinvestment Plan	0.1			$ 0.1
Common shares issued - Dividend Reinvestment Plan (in shares)				14,000
Common shares issued - Employee Stock Purchase Plan	0.6			$ 0.7		(0.1)
Common shares issued - Employee Stock Purchase Plan (in shares)				47,000
Share-based compensation	7.8					7.8
Common shares dividends	(17.2)							(17.2)
Distributions to non-controlling interests	(0.9)									(0.9)
Sale of subsidiary shares of non-controlling interests	(5.8)									(5.8)
Comprehensive income (loss)
Currency translation adjustment	1.6								1.6
Pension benefit plan, net of tax	16.9	[1],[2]							16.9
Loss on derivative instruments, net of tax	(4.3)	[3]							(4.3)
Net (loss) income	372.8							372.2		0.6
Balance at Jun. 30, 2018	$ 1,238.9			$ 918.4		$ 67.3		$ 333.4	$ (80.2)	$ 0.0
Balance (in shares) at Jun. 30, 2018	139,434,706			139,435,000

[1] Net of $3.6 million of associated tax impact that resulted in an increase to the gain on sale of discontinued operations for the six months ended June 30, 2018.

[2] Net of the effect of $0.2 million and $0.3 million tax benefit for the three and six months ended July 1, 2017, respectively.

[3] Net of the effect of $0.4 million tax benefit for the six months ended June 30, 2018.