Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Income Tax Disclosure [Abstract]
Unrecognized tax benefits at beginning of year	$ 28.6	$ 9.9	$ 12.3
Additions based on tax positions taken during a prior period	0.2	0.2	0.2
Reductions based on tax positions taken during a prior period	(6.3)		(1.6)
Settlement on tax positions taken during a prior period	(1.0)	(4.5)	(0.6)
Tax rate change	(4.5)
Lapse in statute of limitations	(3.2)	(0.1)	(1.8)
Additions based on tax positions taken during the current period	1.7	24.0	1.9
Foreign exchange	0.7	(0.9)	(0.5)
Unrecognized tax benefits at end of year	$ 16.2	$ 28.6	$ 9.9