Balance Sheet Information (Details) - USD ($) $ in Millions	Apr. 30, 2016	Apr. 30, 2015
Other current assets:
Prepaid taxes	$ 208	$ 181
Other	149	151
Other current assets	357	332
Property, plant, and equipment:
Land	76	72
Buildings	468	419
Equipment	619	561
Construction in process	54	88
Property, plant and equipment, gross	1,217	1,140
Less accumulated depreciation	588	554
Property, plant, and equipment, net	629	586
Accounts payable and accrued expenses:
Accounts payable, trade	121	123
Accrued expenses:
Advertising and promotion	133	128
Compensation and commissions	105	110
Excise and other non-income taxes	58	59
Other	84	77
Accrued expenses	380	374
Accounts payable and accrued expenses	501	497
Other liabilities:
Deferred benefit – tax (Note 11)	59	75
Other	87	89
Other liabilities	$ 146	$ 164