Unaudited Condensed Consolidated Statements of Shareholders’ Equity - USD ($) $ in Millions	Total	Share capital	Additional paid-in capital	Accumulated other comprehensive loss	Retained earnings	Total shareholders’ equity	Non- controlling interests
Beginning Balance at Dec. 30, 2017	$ 1,428.4	$ 2.5	$ 1,622.6	$ (747.4)	$ 136.9	$ 1,014.6	$ 413.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	121.9				109.8	109.8	12.1
Other comprehensive (loss) income	(68.8)			(61.8)		(61.8)	(7.0)
Comprehensive income (loss) for the period	53.1			(61.8)	109.8	48.0	5.1
—Issuance of shares	841.2	0.4	840.8			841.2
—Share-based compensation	3.0		3.0			3.0
—Dividends paid to non-controlling interests	(16.2)						(16.2)
—Cost of shares issued	(53.0)		(53.0)			(53.0)
Ending Balance at Jun. 30, 2018	2,256.5	2.9	2,413.4	(809.2)	246.7	1,853.8	402.7
Beginning Balance at Mar. 31, 2018	2,315.1	2.9	2,412.1	(696.6)	161.1	1,879.5	435.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	92.6				85.6	85.6	7.0
Other comprehensive (loss) income	(136.3)			(112.6)		(112.6)	(23.7)
Comprehensive income (loss) for the period	(43.7)			(112.6)	85.6	(27.0)	(16.7)
—Share-based compensation	1.6		1.6			1.6
—Dividends paid to non-controlling interests	(16.2)						(16.2)
—Cost of shares issued	(0.3)		(0.3)			(0.3)
Ending Balance at Jun. 30, 2018	2,256.5	2.9	2,413.4	(809.2)	246.7	1,853.8	402.7
Beginning Balance at Dec. 29, 2018	2,333.7	2.9	2,416.9	(854.3)	381.9	1,947.4	386.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	631.3				635.2	635.2	(3.9)
Other comprehensive (loss) income	22.5			18.7		18.7	3.8
Comprehensive income (loss) for the period	653.8			18.7	635.2	653.9	(0.1)
—Issuance of shares	1.6		1.6			1.6
—Share-based compensation	6.7		6.7			6.7
—Change in ownership of a controlled subsidiary			1.2			1.2	(1.2)
—Shares issued by a subsidiary to a non-controlling interest	1.8						1.8
—Dividends paid to non-controlling interests	(15.0)						(15.0)
Ending Balance at Jun. 29, 2019	2,982.6	2.9	2,426.4	(835.6)	1,017.1	2,610.8	371.8
Beginning Balance at Mar. 30, 2019	2,962.1	2.9	2,420.6	(840.0)	995.6	2,579.1	383.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	26.5				21.5	21.5	5.0
Other comprehensive (loss) income	0.8			4.4		4.4	(3.6)
Comprehensive income (loss) for the period	27.3			4.4	21.5	25.9	1.4
—Issuance of shares	0.4	0.0	0.4			0.4
—Share-based compensation	4.2		4.2			4.2
—Change in ownership of a controlled subsidiary			1.2			1.2	(1.2)
—Shares issued by a subsidiary to a non-controlling interest	1.8						1.8
—Dividends paid to non-controlling interests	(13.2)						(13.2)
Ending Balance at Jun. 29, 2019	$ 2,982.6	$ 2.9	$ 2,426.4	$ (835.6)	$ 1,017.1	$ 2,610.8	$ 371.8