Details of Foreign Exchange Contracts Pre-Tax Amounts (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015	Jan. 02, 2016
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Proceeds from Hedge, Investing Activities			$ (67.9)	$ 81.1
Document Period End Date			Oct. 01, 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	0.8	$ 3.5	6.1	10.9
Interest Expense, Debt		11.7	19.9	35.4
Net Investment Hedging | Foreign Exchange Contracts
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative, Notional Amount	1,200.0		1,200.0
Proceeds from Hedge, Investing Activities			63.3	112.2
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)	16.0	40.8	53.8	38.3
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