Quarterly report pursuant to Section 13 or 15(d)

Equity Method Investments (Details Textual)

v3.20.2
Equity Method Investments (Details Textual)
$ / shares in Units, $ in Millions, $ in Millions
 1 Months Ended 3 Months Ended
May 31, 2020
USD ($)
May 01, 2020
USD ($)
May 01, 2020
CAD ($)
$ / shares
Jun. 27, 2019
CAD ($)
$ / shares
shares
Nov. 01, 2018
USD ($)
Nov. 01, 2018
CAD ($)
$ / shares
shares
Jun. 30, 2020
May 31, 2020
USD ($)
May 31, 2019
USD ($)
May 31, 2020
$ / shares
Feb. 29, 2020
$ / shares
Nov. 30, 2017
shares
Schedule of Equity Method Investments [Line Items]                        
Payments to acquire investments | $               $ 213.4 $ 20.0      
Net gain (loss) recognized in income (loss) | $               $ (52.7) (19.7)      
Common shares to be repurchased for cancellation under share repurchase credit feature       27,378,866                
Canopy Equity Method Investment [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Equity method investment, ownership percentage 35.20%   38.60%     36.60%   35.20%     35.30%  
Equity in earnings (losses) of equity method investees and related activities | $               $ (377.6) $ (106.0)      
Fair value of equity method investment | $ $ 2,499.2             2,499.2        
Equity method investment, difference between carrying amount and underlying equity | $ 168.3             168.3        
May 2020 Canopy Investment [Member] | Foreign currency contracts [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Net gain (loss) recognized in income (loss) | $               $ (7.5)        
Acreage                        
Schedule of Equity Method Investments [Line Items]                        
Ownership percentage subject to fixed exchange ratio               100.00%        
Acreage | Subsequent Event [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Ownership percentage subject to fixed exchange ratio             70.00%          
New Tranche B Warrants and New Tranche C Warrants [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Warrant reduction due to open market or private agreement purchases       20,000,000                
New Tranche B Warrants and New Tranche C Warrants [Member] | Maximum [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Dollar value of common shares to be repurchased for cancellation under share repurchase credit feature | $       $ 1,583.0                
November 2017 Canopy Investment [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Cost method investment, ownership percentage                       9.90%
Equity securities [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Payments to acquire investments   $ 173.9 $ 245.0   $ 3,869.9 $ 5,078.7            
Common Stock [Member] | November 2018 Canopy Investment [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of common shares acquired           104,500,000            
Common Stock [Member] | November 2017 Canopy Investment [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of common shares acquired                       18,900,000
Warrant [Member] | Canopy Warrants [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Payments to acquire investments | $ $ 5,600.0                      
Warrant [Member] | November 2017 Canopy Warrants [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of common shares to be acquired upon exercise of warrants                       18,900,000
Exercise price of warrants, C$ per share | $ / shares     $ 12.98                  
Warrant [Member] | November 2017 Canopy Warrants [Member] | Significant Other Observable Inputs (Level 2) [Member] | Closing stock price [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Warrants outstanding, measurement input, C$ per share | $ / shares     $ 21.43               $ 25.17  
Warrant [Member] | November 2018 Canopy Warrants [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of common shares to be acquired upon exercise of warrants           139,700,000            
Warrant [Member] | Tranche A Warrants [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of common shares to be acquired upon exercise of warrants           88,500,000            
Exercise price of warrants, C$ per share | $ / shares           $ 50.40            
Warrant [Member] | Tranche B Warrants [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of common shares to be acquired upon exercise of warrants           51,200,000            
Warrant [Member] | New November 2018 Canopy Warrants [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of common shares to be acquired upon exercise of warrants       139,700,000                
Warrant [Member] | New Tranche A Warrants [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of common shares to be acquired upon exercise of warrants       88,500,000                
Exercise price of warrants, C$ per share | $ / shares       $ 50.40                
Warrant [Member] | New Tranche A Warrants [Member] | Significant Other Observable Inputs (Level 2) [Member] | Closing stock price [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Warrants outstanding, measurement input, C$ per share | $ / shares                   $ 24.21 25.17  
Warrant [Member] | New Tranche B Warrants [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of common shares to be acquired upon exercise of warrants       38,400,000                
Exercise price of warrants, C$ per share | $ / shares       $ 76.68                
Warrant [Member] | New Tranche B Warrants [Member] | Significant Other Observable Inputs (Level 2) [Member] | Closing stock price [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Warrants outstanding, measurement input, C$ per share | $ / shares                   $ 24.21 $ 25.17  
Warrant [Member] | New Tranche C Warrants [Member]                        
Schedule of Equity Method Investments [Line Items]                        
Number of common shares to be acquired upon exercise of warrants       12,800,000