Pretax Amounts Related to Foreign Currency Derivative Contracts that were Recognized in and Reclassified from Accumulated Other Comprehensive Income (Loss) (Detail) (Foreign Exchange Contract, Designated as Hedging Instrument, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Foreign Exchange Contract | Designated as Hedging Instrument
Contracts qualifying for hedge accounting:
Gains recognized in accumulated other comprehensive loss	$ 18.2	$ 40.1
(Gains) losses reclassified from accumulated other comprehensive loss	(8.2)	0.3
Comprehensive income	$ 10.0	$ 40.4