Balance Sheet Information (Details) - USD ($) $ in Millions	Apr. 30, 2019	Apr. 30, 2018
Other current assets:
Prepaid taxes	$ 191	$ 196
Other	92	102
Other current assets	283	298
Property, plant, and equipment:
Land	82	82
Buildings	617	568
Equipment	769	725
Construction in process	57	61
Property, plant and equipment, gross	1,525	1,436
Less accumulated depreciation	709	656
Property, plant, and equipment, net	816	780
Accounts payable and accrued expenses:
Accounts payable, trade	150	154
Accrued expenses:
Advertising and promotion	160	136
Compensation and commissions	84	99
Excise and other non-income taxes	63	77
Other	87	115
Accrued expenses	394	427
Accounts payable and accrued expenses	544	581
Accumulated other comprehensive income (loss), net of tax:
Currency translation adjustments	(207)	(180)
Cash flow hedge adjustments	31	(17)
Postretirement benefits adjustments	(187)	(181)
Accumulated other comprehensive income (loss), net of tax:	$ (363)	$ (378)