Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details 1)

v3.10.0.1
Fair Value of Financial Instruments (Details 1)
$ in Millions, $ in Millions
3 Months Ended 9 Months Ended
Nov. 30, 2018
USD ($)
Nov. 30, 2017
USD ($)
Nov. 30, 2018
USD ($)
Nov. 30, 2017
USD ($)
Nov. 01, 2018
CAD ($)
Feb. 28, 2018
USD ($)
Fair Value, Net Asset (Liability) [Abstract]            
Debt securities $ 2,048.1   $ 2,048.1     $ 672.2
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]            
Unrealized net gain (loss) on securities measured at fair value (163.9) $ 216.8 786.5 $ 216.8    
Equity securities [Member]            
Fair Value, Net Asset (Liability) [Abstract]            
Equity securities 1,881.2   1,881.2     655.6
Equity securities [Member] | November 2017 Canopy Investment [Member]            
Fair Value, Net Asset (Liability) [Abstract]            
Equity securities 0.0   0.0     402.4
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]            
Unrealized net gain (loss) on securities measured at fair value (168.5) 139.7 292.5 139.7    
Warrant [Member] | November 2017 Canopy Warrants [Member]            
Fair Value, Net Asset (Liability) [Abstract]            
Equity securities 476.8   476.8     253.2
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]            
Unrealized net gain (loss) on securities measured at fair value (212.4) 77.1 223.5 77.1    
Warrant [Member] | November 2018 Canopy Warrants [Member]            
Fair Value, Net Asset (Liability) [Abstract]            
Equity securities 1,404.4   1,404.4   $ 2,131.3 0.0
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]            
Unrealized net gain (loss) on securities measured at fair value 257.6 0.0 257.6 0.0    
Convertible debt securities [Member]            
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]            
Unrealized net gain (loss) on securities measured at fair value (40.6) $ 0.0 12.9 $ 0.0    
Recurring [Member] | Foreign currency contracts [Member]            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative asset 11.3   11.3     40.3
Derivative liability 67.5   67.5     19.9
Recurring [Member] | Commodity derivative contracts [Member]            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative asset 8.3   8.3     9.1
Derivative liability 17.2   17.2     5.6
Recurring [Member] | Equity securities [Member]            
Fair Value, Net Asset (Liability) [Abstract]            
Equity securities 1,881.2   1,881.2     655.6
Recurring [Member] | Convertible debt securities [Member]            
Fair Value, Net Asset (Liability) [Abstract]            
Debt securities 166.9   166.9      
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     0.0
Derivative liability 0.0   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     0.0
Derivative liability 0.0   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   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   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 11.3   11.3     40.3
Derivative liability 67.5   67.5     19.9
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Commodity derivative contracts [Member]            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative asset 8.3   8.3     9.1
Derivative liability 17.2   17.2     5.6
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Equity securities [Member]            
Fair Value, Net Asset (Liability) [Abstract]            
Equity securities 1,881.2   1,881.2     253.2
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Convertible debt securities [Member]            
Fair Value, Net Asset (Liability) [Abstract]            
Debt securities 166.9   166.9      
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     0.0
Derivative liability 0.0   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     0.0
Derivative liability 0.0   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     0.0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Convertible debt securities [Member]            
Fair Value, Net Asset (Liability) [Abstract]            
Debt securities $ 0.0   $ 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