Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Fair Value of Financial Instruments - Recurring Basis Measurements (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2020
Aug. 31, 2019
Feb. 29, 2020
Fair Value, Net Asset (Liability) [Abstract]            
Debt securities   $ 764.0   $ 764.0   $ 1,117.1
Debt and Equity Securities, Unrealized Gain (Loss), Excluding Other-than-temporary Impairment [Abstract]            
Unrealized net gain (loss) on securities measured at fair value   (47.6) $ (839.1) (244.9) $ (1,666.6)  
Warrant | 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 (316.7) (61.8) (450.8)  
Warrant | 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 $ 1,176.0 (57.6) (473.6) (180.6) (1,134.4)  
Canopy 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   10.0 $ (48.8) (2.5) $ (81.4)  
Recurring | Foreign currency contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative asset   16.9   16.9   96.3
Derivative liability   64.5   64.5   34.4
Recurring | Commodity derivative contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative asset   5.5   5.5   0.6
Derivative liability   31.0   31.0   40.9
Recurring | Interest rate swap contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative liability           0.8
Recurring | Treasury lock contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative liability           7.6
Recurring | Equity securities            
Fair Value, Net Asset (Liability) [Abstract]            
Equity securities   635.9   635.9   991.5
Recurring | Canopy Debt Securities            
Fair Value, Net Asset (Liability) [Abstract]            
Debt securities   128.1   128.1   125.6
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) | Interest rate swap contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative liability           0.0
Recurring | Quoted Prices in Active Markets (Level 1) | Treasury lock contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative liability           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) | Canopy 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   16.9   16.9   96.3
Derivative liability   64.5   64.5   34.4
Recurring | Significant Other Observable Inputs (Level 2) | Commodity derivative contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative asset   5.5   5.5   0.6
Derivative liability   31.0   31.0   40.9
Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swap contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative liability           0.8
Recurring | Significant Other Observable Inputs (Level 2) | Treasury lock contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative liability           7.6
Recurring | Significant Other Observable Inputs (Level 2) | Equity securities            
Fair Value, Net Asset (Liability) [Abstract]            
Equity securities   635.9   635.9   991.5
Recurring | Significant Other Observable Inputs (Level 2) | Canopy Debt Securities            
Fair Value, Net Asset (Liability) [Abstract]            
Debt securities   128.1   128.1   125.6
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) | Interest rate swap contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative liability           0.0
Recurring | Significant Unobservable Inputs (Level 3) | Treasury lock contracts            
Fair Value, Net Asset (Liability) [Abstract]            
Derivative liability           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) | Canopy Debt Securities            
Fair Value, Net Asset (Liability) [Abstract]            
Debt securities   $ 0.0   $ 0.0   $ 0.0