Intangible assets - Schedule of Principal acquired brands with indefinite useful life (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Disclosure of intangible assets with indefinite useful life [line items]
Principal acquired brands with indefinite useful life	$ 13,375	$ 14,776	$ 14,814
Brands
Disclosure of intangible assets with indefinite useful life [line items]
Principal acquired brands with indefinite useful life	$ 8,558	9,381	$ 9,642
Brands \| Crown Royal whisky
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	United States
Principal acquired brands with indefinite useful life	$ 1,464	1,464
Brands \| Captain Morgan rum
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	Global
Principal acquired brands with indefinite useful life	$ 1,201	1,201
Brands \| Johnnie Walker whisky
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	Global
Principal acquired brands with indefinite useful life	$ 826	856
Brands \| Smirnoff vodka
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	Global
Principal acquired brands with indefinite useful life	$ 824	824
Brands \| Shui Jing Fang Chinese white spirit
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	Greater China
Principal acquired brands with indefinite useful life	$ 737	698
Brands \| Casamigos tequila
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	United States
Principal acquired brands with indefinite useful life	$ 604	604
Brands \| McDowell's No.1 whisky, rum and brandy
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	India
Principal acquired brands with indefinite useful life	$ 336	371
Brands \| Don Julio tequila
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	United States
Principal acquired brands with indefinite useful life	$ 292	270
Brands \| Yenì Raki
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	Türkiye
Principal acquired brands with indefinite useful life	$ 257	477
Brands \| Seagram's 7 Crown whiskey
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	United States
Principal acquired brands with indefinite useful life	$ 223	223
Brands \| Signature whisky
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	India
Principal acquired brands with indefinite useful life	$ 193	213
Brands \| Zacapa rum
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	Global
Principal acquired brands with indefinite useful life	$ 191	191
Brands \| Black Dog whisky
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	India
Principal acquired brands with indefinite useful life	$ 163	180
Brands \| Antiquity whisky
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	India
Principal acquired brands with indefinite useful life	$ 159	176
Brands \| Gordon's gin
Disclosure of intangible assets with indefinite useful life [line items]
Principal markets	Europe
Principal acquired brands with indefinite useful life	$ 157	163
Brands \| Other brands
Disclosure of intangible assets with indefinite useful life [line items]
Principal acquired brands with indefinite useful life	$ 931	$ 1,470