Goodwill (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2025	Aug. 31, 2024	Feb. 28, 2025
Changes in the carrying amount of goodwill [Roll Forward]
Goodwill, beginning of period			$ 5,126.8	$ 7,980.3	$ 7,980.3
Purchase accounting allocations					71.2
Foreign currency translation adjustments			52.5		(110.8)
Goodwill impairment	$ 0.0	$ (2,250.0)	0.0	(2,250.0)	(2,740.7)
SVEDKA Divestiture					(73.2)
Goodwill, end of period	5,179.3		5,179.3		5,126.8
Operating Segments | Beer
Changes in the carrying amount of goodwill [Roll Forward]
Goodwill, beginning of period			5,126.8	5,238.2	5,238.2
Purchase accounting allocations					0.0
Foreign currency translation adjustments			52.5		(111.4)
Goodwill impairment					0.0
SVEDKA Divestiture					0.0
Goodwill, end of period	5,179.3		5,179.3		5,126.8
Operating Segments | Wine and Spirits
Changes in the carrying amount of goodwill [Roll Forward]
Goodwill, beginning of period			0.0	2,742.1	2,742.1
Purchase accounting allocations					71.2
Foreign currency translation adjustments			0.0		0.6
Goodwill impairment		$ (2,250.0)		$ (2,250.0)	(2,740.7)
SVEDKA Divestiture					(73.2)
Goodwill, end of period	$ 0.0		$ 0.0		$ 0.0