Balance Sheet Information (Details) - USD ($) $ in Millions	Apr. 30, 2020	Apr. 30, 2019
Other current assets:
Prepaid taxes	$ 195	$ 191
Other	140	92
Other current assets	335	283
Property, plant, and equipment:
Land	82	82
Buildings	652	617
Equipment	814	769
Construction in process	41	57
Property, plant and equipment, gross	1,589	1,525
Less accumulated depreciation	741	709
Property, plant, and equipment, net	848	816
Accounts payable and accrued expenses:
Accounts payable, trade	131	150
Accrued expenses:
Advertising and promotion	135	160
Compensation and commissions	71	84
Excise and other non-income taxes	80	63
Other	100	87
Accrued expenses	386	394
Accounts payable and accrued expenses	517	544
Accumulated other comprehensive income (loss), net of tax:
Currency translation adjustments	(302)	(207)
Cash flow hedge adjustments	60	31
Postretirement benefits adjustments	(305)	(187)
Accumulated other comprehensive income (loss), net of tax:	$ (547)	$ (363)