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
May 31, 2021
USD ($)
shares
May 01, 2020
USD ($)
May 01, 2020
CAD ($)
$ / shares
shares
May 31, 2021
USD ($)
shares
May 31, 2020
USD ($)
Feb. 28, 2021
USD ($)
Fair Value, Net Asset (Liability) [Abstract]            
Debt securities $ 1,075.7     $ 1,075.7   $ 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       (745.1) $ (197.3)  
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       (8.9) (12.5)  
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 (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       $ (736.2) $ (123.0)  
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    
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    
Recurring | Foreign currency contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative asset $ 94.6     $ 94.6   76.6
Derivative liability 7.8     7.8   9.7
Recurring | Commodity derivative contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative asset 39.6     39.6   21.2
Derivative liability 1.6     1.6   5.3
Recurring | Equity securities            
Fair Value, Net Asset (Liability) [Abstract]            
Equity securities 903.5     903.5   1,639.7
Recurring | Convertible debt securities            
Fair Value, Net Asset (Liability) [Abstract]            
Debt securities 170.1     170.1   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
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 | Significant Other Observable Inputs (Level 2) | Foreign currency contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative asset 94.6     94.6   76.6
Derivative liability 7.8     7.8   9.7
Recurring | Significant Other Observable Inputs (Level 2) | Commodity derivative contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative asset 39.6     39.6   21.2
Derivative liability 1.6     1.6   5.3
Recurring | Significant Other Observable Inputs (Level 2) | Equity securities            
Fair Value, Net Asset (Liability) [Abstract]            
Equity securities 903.5     903.5   1,639.7
Recurring | Significant Other Observable Inputs (Level 2) | Convertible debt securities            
Fair Value, Net Asset (Liability) [Abstract]            
Debt securities 170.1     170.1   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
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