Analysis of accumulated other comprehensive (loss) income (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 28, 2020	Mar. 30, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning Balance	$ 3,010.7	$ 2,333.7
Other comprehensive (loss) income, net of tax, attributable to parent	(195.6)
Other comprehensive income (loss)	(214.8)	21.7
Ending Balance	2,841.4	2,962.1
Accumulated OCI attributable to shareholders
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning Balance	(858.4)	(854.3)
Other comprehensive (loss) income, net of tax, attributable to parent	(207.4)	14.3
Other comprehensive income (loss)	(207.4)	14.3
Ending Balance	(1,065.8)	(840.0)
Post- retirement benefit
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning Balance	(9.3)	7.6
Other comprehensive (loss) income, net of tax, attributable to parent	1.1
Other comprehensive income (loss)	(0.1)
Ending Balance	(8.2)	7.6
Foreign currency translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Other comprehensive (loss) income, net of tax, attributable to parent	1.2
Cumulative translation adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning Balance	(812.3)	(850.0)
Other comprehensive (loss) income, net of tax, attributable to parent	(196.8)	25.4
Other comprehensive (loss) income, net of tax, attributable to noncontrolling interest	(7.4)	7.4
Other comprehensive income (loss)	(203.0)	32.8
Ending Balance	(1,009.1)	(824.6)
Cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning Balance	(36.8)	(11.9)
Other comprehensive (loss) income, net of tax, attributable to parent	(11.7)	(11.1)
Ending Balance	(48.5)	(23.0)
Non- controlling interests
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning Balance	(46.0)	(43.6)
Other comprehensive (loss) income, net of tax, attributable to noncontrolling interest	(7.4)	7.4
Ending Balance	(53.4)	(36.2)
Accumulated OCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning Balance	(904.4)	(897.9)
Ending Balance	$ (1,119.2)	$ (876.2)

Amount after tax and reclassification adjustments of other comprehensive income (loss).

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