Fair Value Measurements (Tables)

12 Months Ended

Apr. 30, 2011

Fair Value Measurements [Abstract]

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

	Level 1		Level 2		Level 3		Total
April 30, 2010:
Assets:
Currency derivatives	$	—	$	6	$	—	$	6
Liabilities:
Currency derivatives		—		6		—		6
April 30, 2011:
Assets:
Commodity derivatives		5		—		—		5
Interest rate swaps		—		3		—		3
Liabilities:
Currency derivatives		—		25		—		25