Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Fair Value of Financial Instruments - Recurring Basis Measurements (Details)
$ / shares in Units, shares in Millions, $ in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Aug. 31, 2021
USD ($)
shares
May 01, 2020
USD ($)
May 01, 2020
CAD ($)
$ / shares
shares
Aug. 31, 2021
USD ($)
shares
Aug. 31, 2020
USD ($)
Aug. 31, 2021
USD ($)
shares
Aug. 31, 2020
USD ($)
Feb. 28, 2021
USD ($)
Fair Value, Net Asset (Liability) [Abstract]                
Debt securities $ 488.6     $ 488.6   $ 488.6   $ 1,818.1
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]                
Unrealized net gain (loss) on securities measured at fair value       (590.0) $ (47.6) (1,335.1) $ (244.9)  
Equity securities                
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]                
Payments to acquire investments 3,044.3              
Equity securities | May 2020 Canopy Investment                
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]                
Payments to acquire investments $ 173.9 $ 173.9 $ 245.0          
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       (19.2) 10.0 (28.1) (2.5)  
Warrants | November 2017 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       0.0 0.0 0.0 (61.8)  
Warrants | New 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       $ (570.8) $ (57.6) $ (1,307.0) $ (180.6)  
Warrants | May 2020 Canopy Investment                
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]                
Exercise price of warrants, C$ per share | $ / shares     $ 12.98          
Common Stock                
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]                
Equity method investment, number of common shares acquired (in shares) | shares 142.3     142.3   142.3    
Common Stock | May 2020 Canopy 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 18.9   18.9 18.9   18.9    
Recurring | Foreign currency contracts                
Fair Value, Net Asset (Liability) [Abstract]                
Derivative asset $ 70.0     $ 70.0   $ 70.0   76.6
Derivative liability 10.6     10.6   10.6   9.7
Recurring | Commodity derivative contracts                
Fair Value, Net Asset (Liability) [Abstract]                
Derivative asset 53.7     53.7   53.7   21.2
Derivative liability 0.4     0.4   0.4   5.3
Recurring | Equity securities                
Fair Value, Net Asset (Liability) [Abstract]                
Equity securities 332.7     332.7   332.7   1,639.7
Recurring | Convertible debt securities                
Fair Value, Net Asset (Liability) [Abstract]                
Debt securities 153.8     153.8   153.8   176.3
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   0.0
Derivative liability 0.0     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   0.0
Derivative liability 0.0     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   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   0.0
Recurring | Significant Other Observable Inputs (Level 2) | Foreign currency contracts                
Fair Value, Net Asset (Liability) [Abstract]                
Derivative asset 70.0     70.0   70.0   76.6
Derivative liability 10.6     10.6   10.6   9.7
Recurring | Significant Other Observable Inputs (Level 2) | Commodity derivative contracts                
Fair Value, Net Asset (Liability) [Abstract]                
Derivative asset 53.7     53.7   53.7   21.2
Derivative liability 0.4     0.4   0.4   5.3
Recurring | Significant Other Observable Inputs (Level 2) | Equity securities                
Fair Value, Net Asset (Liability) [Abstract]                
Equity securities 332.7     332.7   332.7   1,639.7
Recurring | Significant Other Observable Inputs (Level 2) | Convertible debt securities                
Fair Value, Net Asset (Liability) [Abstract]                
Debt securities 153.8     153.8   153.8   176.3
Recurring | Significant Unobservable Inputs (Level 3) | Foreign currency contracts                
Fair Value, Net Asset (Liability) [Abstract]                
Derivative asset 0.0     0.0   0.0   0.0
Derivative liability 0.0     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   0.0
Derivative liability 0.0     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   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   $ 0.0