Fair Value Adjustments Relating to Swaps (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Document Period End Date	Mar. 31, 2018
Foreign Exchange Contract [Member] | Net Investment Hedging [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Interest Rate Derivatives	$ 745.1
Foreign Exchange Contract [Member] | Net Investment Hedging [Member] | Other Income And Expense [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		$ (15.7)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net		$ 0.0