Consolidated Statements of Equity - USD ($) $ in Millions		Total		Equity Incentive Plan	Common Shares	Common Shares Equity Incentive Plan	Additional Paid-in- Capital	Additional Paid-in- Capital Equity Incentive Plan	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit) Equity Incentive Plan	Accumulated Other Comprehensive Loss	Non- Controlling Interests
Balance (in shares) at Dec. 30, 2017					139,489,000
Balance at Dec. 30, 2017		$ 885.7			$ 917.1		$ 69.1		$ (12.2)		$ (94.4)	$ 6.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares repurchased and canceled (in shares)					(355,000)
Common shares repurchased and canceled		(5.6)			$ (5.6)				0.0
Common shares issued - Equity Incentive Plan (in shares)					992,000
Common shares issued - Equity Incentive Plan		1.5			$ 10.3		(8.8)
Common shares issued - Dividend Reinvestment Plan (in shares)					8,000
Common shares issued - Dividend Reinvestment Plan		0.1			$ 0.1
Common shares issued - Employee Stock Purchase Plan (in shares)					26,000
Common shares issued - Employee Stock Purchase Plan		0.2			$ 0.3		(0.1)
Share-based compensation		3.4					3.4
Common shares dividends ($0.06 per common share)		(8.5)							(8.5)
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		8.3									8.3
Pension benefit plan, net of tax		16.9									16.9
Loss on derivative instruments, net of tax		(3.8)									(3.8)
Net income (loss)		362.0							361.4			0.6
Balance (in shares) at Mar. 31, 2018					140,160,000
Balance at Mar. 31, 2018		1,253.5			$ 922.2		63.6		340.7		(73.0)	0.0
Balance (in shares) at Dec. 30, 2017					139,489,000
Balance at Dec. 30, 2017		885.7			$ 917.1		69.1		(12.2)		(94.4)	6.1
Comprehensive income (loss)
Currency translation adjustment		(8.7)
Pension benefit plan, net of tax	[1]	16.9
Loss on derivative instruments, net of tax	[2]	(4.3)
Net income (loss)		372.8
Balance (in shares) at Jun. 30, 2018					139,435,000
Balance at Jun. 30, 2018		1,228.6			$ 918.4		67.3		333.4		(90.5)	0.0
Balance (in shares) at Mar. 31, 2018					140,160,000
Balance at Mar. 31, 2018		1,253.5			$ 922.2		63.6		340.7		(73.0)	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares repurchased and canceled (in shares)					(1,001,000)
Common shares repurchased and canceled		(16.1)			$ (6.7)				(9.4)
Common shares issued - Equity Incentive Plan (in shares)						249,000
Common shares issued - Equity Incentive Plan				$ 1.8		$ 2.5		$ (0.7)
Common shares issued - Dividend Reinvestment Plan (in shares)					6,000
Common shares issued - Dividend Reinvestment Plan		0.0			$ 0.0
Common shares issued - Employee Stock Purchase Plan (in shares)					21,000
Common shares issued - Employee Stock Purchase Plan		0.4			$ 0.4		0.0
Share-based compensation		4.4					4.4
Common shares dividends ($0.06 per common share)		(8.7)							(8.7)
Comprehensive income (loss)
Currency translation adjustment		(17.0)									(17.0)
Pension benefit plan, net of tax	[1]	0.0
Loss on derivative instruments, net of tax		(0.5)	[2]								(0.5)
Net income (loss)		10.8							10.8
Balance (in shares) at Jun. 30, 2018					139,435,000
Balance at Jun. 30, 2018		$ 1,228.6			$ 918.4		67.3		333.4		(90.5)	0.0
Balance (in shares) at Dec. 29, 2018		136,195,108			136,195,000
Balance at Dec. 29, 2018		$ 1,170.4			$ 899.4		73.9		298.8		(101.7)	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment		10.5
Common shares repurchased and canceled (in shares)						(770,000)
Common shares repurchased and canceled				(11.0)		$ (6.9)				$ (4.1)
Common shares issued - Equity Incentive Plan (in shares)					519,000
Common shares issued - Equity Incentive Plan		0.0			$ 6.1		(6.1)
Common shares issued - Employee Stock Purchase Plan (in shares)					22,000
Common shares issued - Employee Stock Purchase Plan		0.4			$ 0.4
Share-based compensation		3.5					3.5
Common shares dividends ($0.06 per common share)		(8.2)							(8.2)
Comprehensive income (loss)
Currency translation adjustment		10.6									10.6
Loss on derivative instruments, net of tax		(5.5)									(5.5)
Net income (loss)		(19.7)							(19.7)
Balance (in shares) at Mar. 30, 2019					135,966,000
Balance at Mar. 30, 2019		$ 1,151.0			$ 899.0		71.3		277.3		(96.6)	0.0
Balance (in shares) at Dec. 29, 2018		136,195,108			136,195,000
Balance at Dec. 29, 2018		$ 1,170.4			$ 899.4		73.9		298.8		(101.7)	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment									10.5
Comprehensive income (loss)
Currency translation adjustment		7.1
Pension benefit plan, net of tax	[1]	0.0
Loss on derivative instruments, net of tax	[2]	7.0
Net income (loss)		$ (15.3)
Balance (in shares) at Jun. 29, 2019		134,638,000			134,638,000
Balance at Jun. 29, 2019		$ 1,139.9			$ 890.0		74.4		263.1		(87.6)	0.0
Balance (in shares) at Mar. 30, 2019					135,966,000
Balance at Mar. 30, 2019		1,151.0			$ 899.0		71.3		277.3		(96.6)	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares repurchased and canceled (in shares)					(1,441,000)
Common shares repurchased and canceled		(20.0)			$ (9.5)				(10.5)
Common shares issued - Equity Incentive Plan (in shares)						86,000
Common shares issued - Equity Incentive Plan				0.0		$ 0.2		$ (0.2)
Common shares issued - Dividend Reinvestment Plan (in shares)					3,000
Common shares issued - Dividend Reinvestment Plan		0.0
Common shares issued - Employee Stock Purchase Plan (in shares)						24,000
Common shares issued - Employee Stock Purchase Plan				$ 0.3		$ 0.3
Share-based compensation		3.3					3.3
Common shares dividends ($0.06 per common share)		(8.1)							(8.1)
Comprehensive income (loss)
Currency translation adjustment		(3.5)									(3.5)
Pension benefit plan, net of tax	[1]	0.0
Loss on derivative instruments, net of tax		12.5	[2]								12.5
Net income (loss)		$ 4.4							4.4			0.0
Balance (in shares) at Jun. 29, 2019		134,638,000			134,638,000
Balance at Jun. 29, 2019		$ 1,139.9			$ 890.0		$ 74.4		$ 263.1		$ (87.6)	$ 0.0

[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 $4.9 million and $3.3 million tax expense for the three and six months ended June 29, 2019, respectively and $0.4 million tax benefit for the six months ended June 30, 2018.