Accumulated Other Comprehensive (Loss) Income - Reclassification from OCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Sales	$ 1,272.4	$ 1,147.1	$ 2,378.5	$ 2,179.5
Cost of sales	(1,194.1)	(1,023.9)	(2,193.7)	(1,957.2)
Interest expense	(6.1)	(1.6)	(9.8)	(3.0)
Selling, general and administrative expenses	(49.9)	(41.9)	(98.5)	(89.8)
Reclassification out of Accumulated Other Comprehensive Income | Changes in fair value of effective cash flow hedges:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Sales	(0.9)	(0.5)	(0.2)	(1.6)
Cost of sales	(0.1)	(0.1)	(0.3)	(0.3)
Interest expense	0.1	0.0	0.1	0.0
Total	(0.9)	(0.6)	(0.4)	(1.9)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of retirement benefits:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	0.0	0.2	0.0	0.4
Selling, general and administrative expenses	0.0	0.1	0.0	0.2
Other expenses	0.2	0.0	0.4	0.0
Total	$ 0.2	$ 0.3	$ 0.4	$ 0.6