Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments - Recurring Basis Measurements (Details)

v3.22.2.2
Fair Value of Financial Instruments - Recurring Basis Measurements (Details)
shares in Millions, $ in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Aug. 31, 2022
USD ($)
shares
Aug. 31, 2021
USD ($)
Aug. 31, 2022
USD ($)
shares
Aug. 31, 2021
USD ($)
Aug. 31, 2022
CAD ($)
shares
Jul. 31, 2022
shares
Feb. 28, 2022
USD ($)
Fair Value, Net Asset (Liability) [Abstract]              
Debt securities $ 91.8   $ 91.8       $ 191.4
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]              
Unrealized net gain (loss) on securities measured at fair value $ (9.3) $ (590.0) $ (31.7) $ (1,335.1)      
Equity method investment, number of common shares acquired (in shares) | shares 171.5   171.5   171.5    
Convertible debt securities              
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]              
Unrealized net gain (loss) on securities measured at fair value $ (4.4) (19.2) $ (8.1) (28.1)      
Value of debt securities held, C$         $ 100.0    
Convertible debt securities | Canopy Equity Method Investment              
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]              
Equity method investment, number of common shares acquired (in shares) | shares           29.2  
Warrants | November 2018 Canopy Warrants              
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]              
Unrealized net gain (loss) on securities measured at fair value (4.9) $ (570.8) (23.6) $ (1,307.0)      
Recurring | Foreign currency contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative asset 125.4   125.4       56.4
Derivative liability 29.8   29.8       17.8
Recurring | Commodity derivative contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative asset 86.4   86.4       91.0
Derivative liability 19.9   19.9       0.9
Recurring | Equity securities              
Fair Value, Net Asset (Liability) [Abstract]              
Equity securities 12.8   12.8       36.3
Recurring | Convertible debt securities              
Fair Value, Net Asset (Liability) [Abstract]              
Debt securities 67.5   67.5       146.6
Recurring | Pre-issuance hedge contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative liability             0.4
Recurring | Quoted Prices in Active Markets (Level 1) | Foreign currency contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative asset 0.0   0.0       0.0
Derivative liability 0.0   0.0       0.0
Recurring | Quoted Prices in Active Markets (Level 1) | Commodity derivative contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative asset 0.0   0.0       0.0
Derivative liability 0.0   0.0       0.0
Recurring | Quoted Prices in Active Markets (Level 1) | Equity securities              
Fair Value, Net Asset (Liability) [Abstract]              
Equity securities 0.0   0.0       0.0
Recurring | Quoted Prices in Active Markets (Level 1) | Convertible debt securities              
Fair Value, Net Asset (Liability) [Abstract]              
Debt securities 0.0   0.0       0.0
Recurring | Quoted Prices in Active Markets (Level 1) | Pre-issuance hedge contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative liability             0.0
Recurring | Significant Other Observable Inputs (Level 2) | Foreign currency contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative asset 125.4   125.4       56.4
Derivative liability 29.8   29.8       17.8
Recurring | Significant Other Observable Inputs (Level 2) | Commodity derivative contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative asset 86.4   86.4       91.0
Derivative liability 19.9   19.9       0.9
Recurring | Significant Other Observable Inputs (Level 2) | Equity securities              
Fair Value, Net Asset (Liability) [Abstract]              
Equity securities 12.8   12.8       36.3
Recurring | Significant Other Observable Inputs (Level 2) | Convertible debt securities              
Fair Value, Net Asset (Liability) [Abstract]              
Debt securities 67.5   67.5       146.6
Recurring | Significant Other Observable Inputs (Level 2) | Pre-issuance hedge contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative liability             0.4
Recurring | Significant Unobservable Inputs (Level 3) | Foreign currency contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative asset 0.0   0.0       0.0
Derivative liability 0.0   0.0       0.0
Recurring | Significant Unobservable Inputs (Level 3) | Commodity derivative contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative asset 0.0   0.0       0.0
Derivative liability 0.0   0.0       0.0
Recurring | Significant Unobservable Inputs (Level 3) | Equity securities              
Fair Value, Net Asset (Liability) [Abstract]              
Equity securities 0.0   0.0       0.0
Recurring | Significant Unobservable Inputs (Level 3) | Convertible debt securities              
Fair Value, Net Asset (Liability) [Abstract]              
Debt securities $ 0.0   $ 0.0       0.0
Recurring | Significant Unobservable Inputs (Level 3) | Pre-issuance hedge contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative liability             $ 0.0