Annual report pursuant to Section 13 and 15(d)

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

v3.23.1
Fair Value of Financial Instruments - Recurring Basis Measurements (Details)
shares in Millions, $ in Millions, $ in Millions
 1 Months Ended 12 Months Ended
Feb. 28, 2023
CAD ($)
Jul. 31, 2022
CAD ($)
shares
Feb. 28, 2023
USD ($)
shares
Feb. 28, 2022
USD ($)
Feb. 28, 2021
USD ($)
Fair Value, Net Asset (Liability) [Abstract]          
Debt securities     $ 93.2 $ 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     $ (45.9) (1,644.7) $ 802.0
Equity method investment, number of common stock shares acquired (in shares) | shares     171.5    
July 2020 Canopy Investment          
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]          
Equity method investment, number of common stock shares acquired (in shares) | shares   29.2      
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     $ (9.8) (41.3)  
Sale of debt securities, C$ $ 100.0 $ 100.0      
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     (36.1) (1,603.4)  
Recurring | Foreign currency contracts          
Fair Value, Net Asset (Liability) [Abstract]          
Derivative asset     249.5 56.4  
Derivative liability     17.2 17.8  
Recurring | Commodity derivative contracts          
Fair Value, Net Asset (Liability) [Abstract]          
Derivative asset     25.8 91.0  
Derivative liability     27.8 0.9  
Recurring | Equity securities          
Fair Value, Net Asset (Liability) [Abstract]          
Equity securities     0.2 36.3  
Recurring | Convertible debt securities          
Fair Value, Net Asset (Liability) [Abstract]          
Debt securities     69.6 146.6  
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  
Derivative liability     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  
Derivative liability     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  
Recurring | Quoted Prices in Active Markets (Level 1) | Convertible debt securities          
Fair Value, Net Asset (Liability) [Abstract]          
Debt securities     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     249.5 56.4  
Derivative liability     17.2 17.8  
Recurring | Significant Other Observable Inputs (Level 2) | Commodity derivative contracts          
Fair Value, Net Asset (Liability) [Abstract]          
Derivative asset     25.8 91.0  
Derivative liability     27.8 0.9  
Recurring | Significant Other Observable Inputs (Level 2) | Equity securities          
Fair Value, Net Asset (Liability) [Abstract]          
Equity securities     0.2 36.3  
Recurring | Significant Other Observable Inputs (Level 2) | Convertible debt securities          
Fair Value, Net Asset (Liability) [Abstract]          
Debt securities     69.6 146.6  
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  
Derivative liability     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  
Derivative liability     0.0 0.0  
Recurring | Significant Unobservable Inputs (Level 3) | Equity securities          
Fair Value, Net Asset (Liability) [Abstract]          
Equity securities     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  
Recurring | Significant Unobservable Inputs (Level 3) | Pre-issuance hedge contracts          
Fair Value, Net Asset (Liability) [Abstract]          
Derivative liability       $ 0.0