Summary of Significant Accounting Policies (Details 3) (USD $) In Millions, unless otherwise specified	Jan. 01, 2012
Fair values of derivative financial instruments
Total liability derivatives	$ 2.5
Designated as Hedging Instrument [Member]
Fair values of derivative financial instruments
Total liability derivatives	2.0
Not Designated as Hedging Instrument [Member]
Fair values of derivative financial instruments
Total liability derivatives	0.5
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Fair values of derivative financial instruments
Total liability derivatives	2.0
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Fair values of derivative financial instruments
Total liability derivatives	$ 0.5