Segment Reporting - Reconciliation of Segment Earnings to Income Before Provision for Income Taxes (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Segment Reporting [Abstract]
Segment earnings	$ 385.2	$ 345.1	$ 1,211.0	$ 1,091.4
Interest expense	21.7	20.6	63.9	62.0
Other (income) expense, net	(21.8)	14.2	(12.3)	(0.8)
Consolidated income before provision for income taxes and equity in net income of affiliates	$ 385.3	$ 310.3	$ 1,159.4	$ 1,030.2