Segment Reporting - Reconciliation of Segment Earnings to Income Before Provision for Income Taxes (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Segment Reporting [Abstract]
Segment earnings	$ 462.9	$ 416.7
Interest expense	20.7	20.8
Other (income) expense, net	(5.6)	3.7
Consolidated income before provision for income taxes and equity in net income of affiliates	$ 447.8	$ 392.2