Fair Value Measurements (Details) (USD $) In Millions, unless otherwise specified	Jul. 31, 2012
Summary of assets and liabilities measured at fair value on a recurring basis
Short-term borrowings	$ 6.5
Long-term debt	529.6
Currency derivatives [Member]
Summary of assets and liabilities measured at fair value on a recurring basis
Liabilities	4.7
Fair Value, Measurements, Recurring [Member]
Summary of assets and liabilities measured at fair value on a recurring basis
Short-term borrowings	6.5
Current portion of long-term debt	2.7
Long-term debt	529.6
Fair Value, Measurements, Recurring [Member] | Currency derivatives [Member]
Summary of assets and liabilities measured at fair value on a recurring basis
Assets, Currency derivatives	8.0
Liabilities	4.7
Fair Value, Measurements, Recurring [Member] | Interest rate swaps [Member]
Summary of assets and liabilities measured at fair value on a recurring basis
Assets	2.2
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Summary of assets and liabilities measured at fair value on a recurring basis
Short-term borrowings
Current portion of long-term debt
Long-term debt
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Currency derivatives [Member]
Summary of assets and liabilities measured at fair value on a recurring basis
Assets, Currency derivatives
Liabilities
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Interest rate swaps [Member]
Summary of assets and liabilities measured at fair value on a recurring basis
Assets
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Summary of assets and liabilities measured at fair value on a recurring basis
Short-term borrowings	6.5
Current portion of long-term debt	2.7
Long-term debt	529.6
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Currency derivatives [Member]
Summary of assets and liabilities measured at fair value on a recurring basis
Assets, Currency derivatives	8.0
Liabilities	4.7
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Interest rate swaps [Member]
Summary of assets and liabilities measured at fair value on a recurring basis
Assets	2.2
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Summary of assets and liabilities measured at fair value on a recurring basis
Short-term borrowings
Current portion of long-term debt
Long-term debt
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Currency derivatives [Member]
Summary of assets and liabilities measured at fair value on a recurring basis
Assets, Currency derivatives
Liabilities
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Interest rate swaps [Member]
Summary of assets and liabilities measured at fair value on a recurring basis
Assets