Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.4
Fair Value of Financial Instruments - Recurring Basis Measurements (Details)
shares in Millions, $ in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Nov. 30, 2022
USD ($)
shares
Nov. 30, 2021
USD ($)
Nov. 30, 2022
USD ($)
shares
Nov. 30, 2021
USD ($)
Aug. 31, 2022
CAD ($)
Jul. 31, 2022
shares
Feb. 28, 2022
USD ($)
Fair Value, Net Asset (Liability) [Abstract]              
Debt securities $ 95.0   $ 95.0       $ 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 $ (7.4) $ (199.7) $ (39.1) $ (1,534.8)      
Equity method investment, number of common shares acquired (in shares) | shares 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 $ (0.3) (10.3) $ (8.4) (38.4)      
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 (7.1) $ (189.4) (30.7) $ (1,496.4)      
Recurring | Foreign currency contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative asset 191.3   191.3       56.4
Derivative liability 19.2   19.2       17.8
Recurring | Commodity derivative contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative asset 57.9   57.9       91.0
Derivative liability 12.9   12.9       0.9
Recurring | Equity securities              
Fair Value, Net Asset (Liability) [Abstract]              
Equity securities 5.6   5.6       36.3
Recurring | Convertible debt securities              
Fair Value, Net Asset (Liability) [Abstract]              
Debt securities 69.1   69.1       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 191.3   191.3       56.4
Derivative liability 19.2   19.2       17.8
Recurring | Significant Other Observable Inputs (Level 2) | Commodity derivative contracts              
Fair Value, Net Asset (Liability) [Abstract]              
Derivative asset 57.9   57.9       91.0
Derivative liability 12.9   12.9       0.9
Recurring | Significant Other Observable Inputs (Level 2) | Equity securities              
Fair Value, Net Asset (Liability) [Abstract]              
Equity securities 5.6   5.6       36.3
Recurring | Significant Other Observable Inputs (Level 2) | Convertible debt securities              
Fair Value, Net Asset (Liability) [Abstract]              
Debt securities 69.1   69.1       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