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Fair Value of Financial Instruments - Impairment of Long-Lived Assets and Long-Lived Assets Held for Sale (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Aug. 31, 2020
May 31, 2020
Nov. 30, 2021
Nov. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Impairment of brewery construction in progress $ 0.0 $ 0.0     $ 665.9 $ 0.0
Impairment of assets held for sale 0.0 21.0     0.0 24.0
Nonrecurring            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Impairment of brewery construction in progress         665.9  
Impairment of assets held for sale           24.0
Nonrecurring | Operating Segments | Wine and Spirits | Wine and Spirits Divestitures and Concentrate Business Divestiture | Disposal Group, Not Discontinued Operations            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Impairment of assets held for sale   21.0 $ (22.0) $ 25.0   24.0
Assets held for sale, carrying value   736.4       736.4
Assets held for sale, estimated fair value   $ 712.4       $ 712.4
Nonrecurring | Mexicali Brewery | Construction in progress | Operating Segments | Beer            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Long-lived assets, carrying value 685.9       685.9  
Long-lived assets, estimated fair value $ 20.0       20.0  
Impairment of brewery construction in progress         $ 665.9