Fair Value Measurements (Tables)

3 Months Ended

Jul. 31, 2011

Fair Value Measurements [Abstract]

Summary of assets and liabilities measured at fair value on a recurring basis

(Dollars in millions)	Level 1		Level 2		Level 3		Total
Assets:
Commodity derivatives	$	2.6		—		—	$	2.6
Interest rate swaps		—		4.7		—		4.7
Liabilities:
Currency derivatives		—		18.9		—		18.9