Net Sales by Product Category (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020		Oct. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 985	$ 989	$ 1,738		$ 1,755
Whiskey [Member]
Disaggregation of Revenue [Line Items]
Net sales	775	785	1,370	[1]	1,385	[1]
Tequila [Member]
Disaggregation of Revenue [Line Items]
Net sales	84	77	152	[2]	145	[2]
Vodka [Member]
Disaggregation of Revenue [Line Items]
Net sales	71	58	112	[3]	97	[3]
Wine [Member]
Disaggregation of Revenue [Line Items]
Net sales	26	31	45	[4]	57	[4]
Rest of portfolio [Member]
Disaggregation of Revenue [Line Items]
Net sales	14	14	29		25
Non-branded and bulk [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 15	$ 24	$ 30	[5]	$ 46	[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, GlenDronach, BenRiach, Glenglassaugh, the Old Forester family of brands, 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.