Net Sales by Product Category (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021		Jan. 31, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 911	$ 899	$ 2,649		$ 2,654
Whiskey [Member]
Disaggregation of Revenue [Line Items]
Net sales	731	701	2,101	[1]	2,086	[1]
Tequila [Member]
Disaggregation of Revenue [Line Items]
Net sales	72	74	224	[2]	219	[2]
Vodka [Member]
Disaggregation of Revenue [Line Items]
Net sales	50	62	162	[3]	159	[3]
Wine [Member]
Disaggregation of Revenue [Line Items]
Net sales	26	32	71	[4]	89	[4]
Rest of portfolio [Member]
Disaggregation of Revenue [Line Items]
Net sales	21	15	50		40
Non-branded and bulk [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 11	$ 15	$ 41	[5]	$ 61	[5]

[1] Includes all whiskey spirits and whiskey-based flavored liqueurs, ready-to-drink, and ready-to-pour products. The brands included in this category are the Jack Daniel's family of brands, the Woodford Reserve family of brands, the Old Forester family of brands, GlenDronach, BenRiach, Glenglassaugh, Slane Irish Whiskey, and Coopers’ Craft. Also includes the Early Times, Canadian Mist, and Collingwood brands, which we divested on July 31, 2020 (Note 14).

[2] Includes el Jimador, the Herradura family of brands, New Mix, Pepe Lopez, and Antiguo.

[3] Includes Finlandia.

[4] Includes Korbel Champagnes and Sonoma-Cutrer wines.

[5] Includes net sales of used barrels, bulk whiskey and wine, and contract bottling regardless of customer location.