Derivative Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	Jan. 31, 2012
Commodity derivatives [Member] | Not designated as hedges [Member] | Accrued Expenses [Member]
Fair values of derivative instruments
Fair value of derivatives in a gain position	$ 0.7
Fair value of derivatives in a loss position	(1.1)
Currency Derivatives [Member] | Cash Flow Hedging [Member] | Other Current Assets [Member]
Fair values of derivative instruments
Fair value of derivatives in a gain position	3.4
Fair value of derivatives in a loss position	(2.3)
Currency Derivatives [Member] | Cash Flow Hedging [Member] | Other Assets [Member]
Fair values of derivative instruments
Fair value of derivatives in a gain position	1.7
Fair value of derivatives in a loss position	(0.8)
Currency Derivatives [Member] | Cash Flow Hedging [Member] | Accrued Expenses [Member]
Fair values of derivative instruments
Fair value of derivatives in a gain position	1.2
Fair value of derivatives in a loss position	(3.4)
Currency Derivatives [Member] | Cash Flow Hedging [Member] | Other Liabilities [Member]
Fair values of derivative instruments
Fair value of derivatives in a gain position	0
Fair value of derivatives in a loss position	(0.7)
Currency Derivatives [Member] | Not designated as hedges [Member] | Accrued Expenses [Member]
Fair values of derivative instruments
Fair value of derivatives in a gain position	0.1
Fair value of derivatives in a loss position	(1.5)
Interest Rate Swaps [Member] | Fair Value Hedging [Member] | Other Current Assets [Member]
Fair values of derivative instruments
Fair value of derivatives in a gain position	1.6
Fair value of derivatives in a loss position	0
Interest Rate Swaps [Member] | Fair Value Hedging [Member] | Other Assets [Member]
Fair values of derivative instruments
Fair value of derivatives in a gain position	1.9
Fair value of derivatives in a loss position	$ 0