Details of Foreign Exchange Contracts Pre-Tax Amounts (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015	Jan. 02, 2016
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Proceeds from Hedge, Investing Activities			$ (26.6)	$ 48.3
Document Period End Date			Jul. 02, 2016
Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative, Notional Amount	$ 0.0		$ 0.0		$ 950.0
Derivative, Loss on Derivative	2.3	$ 3.6	5.3	7.4
Interest Expense, Debt	8.1	11.8	19.9	23.7
Net Investment Hedging | Foreign Exchange Contracts
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative, Notional Amount	1,400.0		1,400.0
Proceeds from Hedge, Investing Activities			5.5	63.9
Net Investment Hedging | Foreign Exchange Contracts | Other Income And Expense [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Amount Recorded in OCI Gain (Loss)	35.2	(39.4)	37.8	(2.5)
Gain (Loss) Recognized in Income (Ineffective Portion)	0.0	$ 0.0	0.0	$ 0.0
Net Investment Hedging | Currency Swap [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative, Notional Amount	$ 250.0		$ 250.0