Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Net income (loss)	$ 105.8	$ (28.0)	$ 182.2	$ 11.9
Foreign currency translation:
—Net translation gain (loss) on foreign operations, net of tax expense, respectively, of $0, $0, $0 and $0	32.6	46.2	(35.4)	(160.8)
—(Loss) gain on net investment hedges, net of tax expense, respectively, of $0, $0, $0 and $0	(2.7)	(5.8)	15.5	(1.8)
Total foreign currency translation movements	29.9	40.4	(19.9)	(162.6)
Cash flow hedges (Interest rate derivatives):
—(Loss) gain arising in the period, net of tax benefit (expense), respectively, of $0.4, $1.2, $(1.5) and $3.7	(3.2)	(9.4)	4.6	(22.8)
—Reclassification to net income, net of tax expense, respectively, of $(1.7), $0, $(2.7) and $0	3.7	1.9	8.0	3.6
Total cash flow hedges movements	0.5	(7.5)	12.6	(19.2)
Post-retirement benefits:
—Reclassification of prior year actuarial movements to net income, net of tax expense, respectively, of $0, $0, $0 and $0	0.0	0.0	0.0	(0.1)
Total post-retirement benefits movements	0.0	0.0	0.0	(0.1)
Other comprehensive income (loss)	30.4	32.9	(7.3)	(181.9)
Comprehensive income (loss) for the period	136.2	4.9	174.9	(170.0)
Comprehensive income (loss) attributable to shareholders:
Comprehensive income (loss) attributable to parent	124.1	7.2	163.7	(164.6)
Comprehensive income (loss) attributable to non-controlling interests	12.1	(2.3)	11.2	(5.4)
—Income (loss) arising from continuing operations
Comprehensive income (loss) attributable to shareholders:
Comprehensive income (loss) attributable to parent	123.7	7.4	163.4	(164.4)
—Income (loss) arising from discontinued operations
Comprehensive income (loss) attributable to shareholders:
Comprehensive income (loss) attributable to parent	$ 0.4	$ (0.2)	$ 0.3	$ (0.2)