Accumulated Other Comprehensive Income (Loss) - Net Changes in Accumulated OCI by Component, Net of Tax (Detail) - USD ($) $ in Millions		3 Months Ended
	Dec. 30, 2018	Mar. 30, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 3,118.6	$ 3,118.6	$ 2,972.3
Impact of the Tax Act on Accumulated Other Comprehensive Income (ASU No. 2018-02)	45.9
Other comprehensive income before reclassifications		7.6	38.3
Amounts reclassified from Accumulated OCI		4.1	5.3
Net other comprehensive income (loss)		11.7	43.6
Ending balance	3,118.6	3,217.8	3,102.3
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(177.9)	(177.9)	(82.5)
Other comprehensive income before reclassifications		7.6	39.1
Amounts reclassified from Accumulated OCI		0.0	0.0
Net other comprehensive income (loss)		7.6	39.1
Ending balance	(177.9)	(170.3)	(43.4)
Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	12.2	12.2	14.5
Other comprehensive income before reclassifications		0.0	(0.8)
Amounts reclassified from Accumulated OCI		(0.4)	(0.5)
Net other comprehensive income (loss)		(0.4)	(1.3)
Ending balance	12.2	11.8	13.2
Defined Benefit Pension and Postretirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(296.5)	(296.5)	(261.0)
Impact of the Tax Act on Accumulated Other Comprehensive Income (ASU No. 2018-02)	(45.9)
Other comprehensive income before reclassifications		0.0	0.0
Amounts reclassified from Accumulated OCI		4.5	5.8
Net other comprehensive income (loss)		4.5	5.8
Ending balance	(342.4)	(337.9)	(255.2)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(462.2)	(462.2)	(329.0)
Impact of the Tax Act on Accumulated Other Comprehensive Income (ASU No. 2018-02)	(45.9)
Net other comprehensive income (loss)		11.7	43.6
Ending balance	$ (508.1)	$ (496.4)	$ (285.4)