Balance Sheet Information (Details) (USD $) In Millions, unless otherwise specified	Apr. 30, 2015	Apr. 30, 2014
Other current assets:
Prepaid taxes	$ 181	$ 172
Other	151	84
Other current assets	332	256
Property, plant, and equipment:
Land	72	72
Buildings	419	381
Equipment	561	534
Construction in process	88	67
Property, plant and equipment, gross	1,140	1,054
Less accumulated depreciation	554	528
Property, plant, and equipment, net	586	526
Accounts payable and accrued expenses:
Accounts payable, trade	123	134
Accrued expenses:
Advertising and promotion	128	107
Compensation and commissions	110	111
Excise and other non-income taxes	59	57
Self-insurance losses	10	10
Postretirement benefits	7	7
Interest	7	7
Other	53	41
Accrued expenses	374	340
Accounts payable and accrued expenses	497	474
Other liabilities:
Deferred benefit – tax (Note 11)	75	90
Other	89	77
Other liabilities	$ 164	$ 167