Goodwill (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Aug. 31, 2021	Feb. 28, 2021
Changes in the carrying amount of goodwill [Roll Forward]
Goodwill, beginning of period	$ 7,793.5	$ 7,757.1
Purchase accounting allocations	0.9	14.3
Foreign currency translation adjustments	4.5	(22.8)
Reclassified from assets held for sale		44.9
Goodwill, end of period	7,798.9	7,793.5
Operating Segments \| Beer
Changes in the carrying amount of goodwill [Roll Forward]
Goodwill, beginning of period	5,125.6	5,163.4
Purchase accounting allocations	0.0	0.0
Foreign currency translation adjustments	6.8	(38.7)
Reclassified from assets held for sale		0.9
Goodwill, end of period	5,132.4	5,125.6
Operating Segments \| Wine and Spirits
Changes in the carrying amount of goodwill [Roll Forward]
Goodwill, beginning of period	2,667.9	2,593.7
Purchase accounting allocations	0.9	14.3
Foreign currency translation adjustments	(2.3)	15.9
Reclassified from assets held for sale		44.0
Goodwill, end of period	$ 2,666.5	$ 2,667.9

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
-Section S99
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of transfers into (out of) an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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