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Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Goodwill (Details) - USD ($) $ in Millions	Aug. 31, 2025	Feb. 28, 2026	Feb. 28, 2025	Feb. 29, 2024
Changes in the Carrying Amount of Goodwill [Rollforward]
Goodwill, beginning of period		$ 5,126.8	$ 7,980.3
Purchase accounting allocations			71.2
Foreign currency translation adjustments		107.1	$ (110.8)
Goodwill, Impairment Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]			Goodwill and intangible assets impairment
Goodwill impairment			$ (2,740.7)
SVEDKA Divestiture			(73.2)
Goodwill, end of period		5,233.9	5,126.8
Goodwill, accumulated impairment loss				$ 0.0
Operating Segments \| Beer
Changes in the Carrying Amount of Goodwill [Rollforward]
Goodwill, beginning of period		5,126.8	5,238.2
Purchase accounting allocations			0.0
Foreign currency translation adjustments		107.1	$ (111.4)
Goodwill, Impairment Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]			Goodwill and intangible assets impairment
Goodwill impairment			$ 0.0
SVEDKA Divestiture			0.0
Goodwill, end of period		5,233.9	5,126.8
Operating Segments \| Wine and Spirits
Changes in the Carrying Amount of Goodwill [Rollforward]
Goodwill, beginning of period		0.0	2,742.1
Purchase accounting allocations			71.2
Foreign currency translation adjustments		0.0	$ 0.6
Goodwill, Impairment Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]			Goodwill and intangible assets impairment
Goodwill impairment	$ (2,250.0)		$ (2,740.7)
SVEDKA Divestiture			(73.2)
Goodwill, end of period		$ 0.0	$ 0.0