Annual report pursuant to Section 13 and 15(d)

Fair Value of Financial Instruments (Details 1)

v3.19.1
Fair Value of Financial Instruments (Details 1)
$ in Millions, $ in Millions
12 Months Ended
Feb. 28, 2019
USD ($)
Feb. 28, 2018
USD ($)
Feb. 28, 2017
USD ($)
Nov. 01, 2018
CAD ($)
Fair Value Net Asset (Liability) [Abstract]        
Debt securities $ 3,234.7 $ 672.2    
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]        
Unrealized net gain on securities measured at fair value 1,971.2 464.3 $ 0.0  
Equity Securities [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Equity securities 3,023.2 655.6    
Equity Securities [Member] | November 2017 Canopy Investment [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Equity securities 0.0 402.4    
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]        
Unrealized net gain on securities measured at fair value 292.5 272.3    
Warrant [Member] | November 2017 Canopy Warrants [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Equity securities 718.7 253.2    
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]        
Unrealized net gain on securities measured at fair value 465.5 192.0    
Warrant [Member] | November 2018 Canopy Warrants [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Equity securities 2,304.5 0.0   $ 2,131.3
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]        
Unrealized net gain on securities measured at fair value 1,157.7 0.0    
Convertible debt securities [Member]        
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]        
Unrealized net gain on securities measured at fair value 55.5 0.0    
Recurring [Member] | Foreign currency contracts [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Derivative Asset 38.2 40.3    
Derivative liability 15.7 19.9    
Recurring [Member] | Commodity derivative contracts [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Derivative Asset 8.7 9.1    
Derivative liability 11.6 5.6    
Recurring [Member] | Equity Securities [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Equity securities 3,023.2 655.6    
Recurring [Member] | Convertible debt securities [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Debt securities 211.5      
Recurring [Member] | Available-for-sale Securities [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Debt securities   16.6    
Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member] | Foreign currency contracts [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Derivative Asset 0.0 0.0    
Derivative liability 0.0 0.0    
Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member] | Commodity derivative contracts [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Derivative Asset 0.0 0.0    
Derivative liability 0.0 0.0    
Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member] | Equity Securities [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Equity securities 0.0 402.4    
Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member] | Convertible debt securities [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Debt securities 0.0      
Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member] | Available-for-sale Securities [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Debt securities   0.0    
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Foreign currency contracts [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Derivative Asset 38.2 40.3    
Derivative liability 15.7 19.9    
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Commodity derivative contracts [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Derivative Asset 8.7 9.1    
Derivative liability 11.6 5.6    
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Equity Securities [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Equity securities 3,023.2 253.2    
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Convertible debt securities [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Debt securities 211.5      
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Available-for-sale Securities [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Debt securities   0.0    
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Foreign currency contracts [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Derivative Asset 0.0 0.0    
Derivative liability 0.0 0.0    
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Commodity derivative contracts [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Derivative Asset 0.0 0.0    
Derivative liability 0.0 0.0    
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Equity securities 0.0 0.0    
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Convertible debt securities [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Debt securities $ 0.0      
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Available-for-sale Securities [Member]        
Fair Value Net Asset (Liability) [Abstract]        
Debt securities   $ 16.6