Derivative Instruments (Details 1) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Jan. 01, 2012
Fair values of derivative financial instruments
Total asset/(liability) derivatives	$ 2.0	$ (2.5)
Designated as Hedging Instrument [Member]
Fair values of derivative financial instruments
Total asset/(liability) derivatives	1.5	(2.0)
Not Designated as Hedging Instrument [Member]
Fair values of derivative financial instruments
Total asset/(liability) derivatives	0.5	(0.5)
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Fair values of derivative financial instruments
Total asset/(liability) derivatives	1.5
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
Fair values of derivative financial instruments
Total asset/(liability) derivatives		(2.0)
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Fair values of derivative financial instruments
Total asset/(liability) derivatives	0.8
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
Fair values of derivative financial instruments
Total asset/(liability) derivatives	$ (0.3)	$ (0.5)