Balance Sheet Information (Details) - USD ($) $ in Millions	Apr. 30, 2021	Apr. 30, 2020
Other current assets:
Prepaid taxes	$ 170	$ 195
Other	93	140
Other current assets	263	335
Property, plant, and equipment:
Land	82	82
Buildings	659	652
Equipment	833	814
Construction in process	50	41
Property, plant and equipment, gross	1,624	1,589
Less accumulated depreciation	792	741
Property, plant, and equipment, net	832	848
Accounts payable and accrued expenses:
Accounts payable, trade	172	131
Accrued expenses:
Advertising, promotion, and discounts	202	135
Compensation and commissions	96	71
Excise and other non-income taxes	70	80
Other	139	100
Accrued expenses	507	386
Accounts payable and accrued expenses	679	517
Accumulated other comprehensive income (loss), net of tax:
Currency translation adjustments	(179)	(302)
Cash flow hedge adjustments	(16)	60
Postretirement benefits adjustments	(227)	(305)
Accumulated other comprehensive income (loss), net of tax:	$ (422)	$ (547)