Supplemental Pro Forma Information Related to Business Acquisitions (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue	$ 3,494.8	$ 3,440.9	$ 10,430.6	$ 9,951.2
Business Acquisition, Pro Forma Net Income (Loss)	$ 254.2	$ 278.2	$ 734.9	$ 946.4
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$ 1.69	$ 1.82	$ 4.83	$ 6.22
Document Period End Date			Sep. 29, 2018