Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments - Long-lived Asset Held for Sale and Trademarks (Details)

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Fair Value of Financial Instruments - Long-lived Asset Held for Sale and Trademarks (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Nov. 30, 2020
Aug. 31, 2020
May 31, 2020
Nov. 30, 2019
Aug. 31, 2019
Nov. 30, 2020
Nov. 30, 2019
Feb. 29, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Impairment of assets held for sale $ 21.0     $ 390.0   $ 24.0 $ 417.0  
Assets held for sale, carrying value 385.5         385.5   $ 552.1
Trademarks, carrying value 2,739.7         2,739.7   2,718.9
Operating Segments | 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     390.0   24.0 417.0  
Assets held for sale, carrying value               552.1
Operating Segments | Wine and Spirits | Disposal Group, Not Discontinued Operations                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Assets held for sale, carrying value 385.5         385.5   481.2
Operating Segments | Beer | Disposal Group, Not Discontinued Operations                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Assets held for sale, carrying value               $ 70.9
Nonrecurring                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Impairment of assets held for sale           24.0 417.0  
Nonrecurring | Trademarks                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Impairment of assets held for sale             11.0  
Nonrecurring | Operating Segments | Wine and Spirits | Wine and Spirits Transactions and Other Wine and Spirits Transactions | 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 | Operating Segments | Wine and Spirits | Original Wine and Spirits Transaction | Disposal Group, Not Discontinued Operations                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Impairment of assets held for sale         $ 27.0      
Nonrecurring | Operating Segments | Wine and Spirits | Revised Wine and Spirits Transaction and Nobilo Transaction | Disposal Group, Not Discontinued Operations                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Impairment of assets held for sale       340.0     367.0  
Assets held for sale, carrying value       1,292.9     1,292.9  
Assets held for sale, estimated fair value       949.6     949.6  
Nonrecurring | Operating Segments | Beer | Trademarks                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Trademarks, carrying value         28.0      
Trademarks, estimated fair value         $ 17.0      
Impairment of trademarks             11.0  
Nonrecurring | Operating Segments | Beer | Ballast Point Divestiture                
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                
Impairment of assets held for sale       50.0        
Assets held for sale, carrying value       81.3     81.3  
Assets held for sale, estimated fair value       $ 40.0     $ 40.0