Net Sales by Product Category (Details) - USD ($) $ in Millions		3 Months Ended
		Jul. 31, 2020	Jul. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales		$ 753	$ 766
Whiskey [Member]
Disaggregation of Revenue [Line Items]
Net sales	[1]	595	600
Tequila [Member]
Disaggregation of Revenue [Line Items]
Net sales	[2]	68	68
Vodka [Member]
Disaggregation of Revenue [Line Items]
Net sales	[3]	41	39
Wine [Member]
Disaggregation of Revenue [Line Items]
Net sales	[4]	19	26
Rest of portfolio [Member]
Disaggregation of Revenue [Line Items]
Net sales		15	11
Non-branded and bulk [Member]
Disaggregation of Revenue [Line Items]
Net sales	[5]	$ 15	$ 22

[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.