Quarterly report pursuant to Section 13 or 15(d)

Equity Method Investments - Narrative (Details)

v3.20.4
Equity Method Investments - Narrative (Details)
$ / shares in Units, $ in Millions, $ in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Nov. 30, 2020
USD ($)
May 01, 2020
USD ($)
May 01, 2020
CAD ($)
$ / shares
Jun. 30, 2019
USD ($)
shares
Jun. 30, 2019
CAD ($)
shares
Nov. 01, 2018
USD ($)
shares
Nov. 01, 2018
CAD ($)
shares
Dec. 31, 2020
CAD ($)
shares
Nov. 30, 2020
USD ($)
Nov. 30, 2019
USD ($)
Nov. 30, 2020
USD ($)
Nov. 30, 2019
USD ($)
Sep. 01, 2020
Aug. 31, 2020
Feb. 29, 2020
Nov. 30, 2017
shares
Schedule of Equity Method Investments [Line Items]                                
Payments to acquire investments                     $ 217.4 $ 33.7        
Net gain (loss) recognized in income (loss)                 $ 11.0 $ 4.6 $ (18.4) (31.1)        
Common shares to be repurchased for cancellation under share repurchase credit feature (in shares) | shares       27,378,866 27,378,866                      
Maximum | Subsequent event | Canopy Equity Method Investment                                
Schedule of Equity Method Investments [Line Items]                                
Estimate pre-tax loss from facility closures               $ 400.0                
Minimum | Subsequent event | Canopy Equity Method Investment                                
Schedule of Equity Method Investments [Line Items]                                
Estimate pre-tax loss from facility closures               350.0                
Canopy Equity Method Investment                                
Schedule of Equity Method Investments [Line Items]                                
Equity method investment, ownership percentage 38.20%   38.60%     36.60% 36.60%   38.20%   38.20%       35.30%  
Equity in earnings (losses) from Canopy and related activities                 $ (12.4) $ 46.2 $ (421.0) $ (544.2)        
Fair value of equity method investment $ 4,083.5               $ 4,083.5   4,083.5          
Canopy Equity Method Investment | Subsequent event                                
Schedule of Equity Method Investments [Line Items]                                
Cash consideration transferred form Canopy divestiture               $ 115.0                
Shares issued from Canopy ownership divestiture (in shares) | shares               3,750,000                
Canopy Equity Method Investment | Maximum | Subsequent event                                
Schedule of Equity Method Investments [Line Items]                                
Equity in earnings (losses) from Canopy and related activities               $ 155.0                
Canopy Equity Method Investment | Minimum | Subsequent event                                
Schedule of Equity Method Investments [Line Items]                                
Equity in earnings (losses) from Canopy and related activities               $ 130.0                
May 2020 Canopy Investment | Foreign currency contracts                                
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                         70.00% 100.00%    
Ownership percentage subject to floating exchange ratio                         30.00%      
New November 2018 Canopy Warrants                                
Schedule of Equity Method Investments [Line Items]                                
Equity in earnings (losses) from Canopy and related activities       $ (409.0)                        
Tranche B Warrants and Tranche C Warrants                                
Schedule of Equity Method Investments [Line Items]                                
Warrant reduction due to open market or private agreement purchases (in shares) | shares       20,000,000 20,000,000                      
Tranche B Warrants and Tranche C Warrants | Maximum                                
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                                
Schedule of Equity Method Investments [Line Items]                                
Cost method investment, ownership percentage                               9.90%
Equity securities                                
Schedule of Equity Method Investments [Line Items]                                
Payments to acquire investments   $ 173.9 $ 245.0     $ 3,869.9 $ 5,078.7                  
Common Stock | November 2018 Canopy Investment                                
Schedule of Equity Method Investments [Line Items]                                
Number of common shares acquired (in shares) | shares           104,500,000 104,500,000                  
Common Stock | November 2017 Canopy Investment                                
Schedule of Equity Method Investments [Line Items]                                
Number of common shares acquired (in shares) | shares                               18,900,000
Warrant | Canopy Warrants [Member]                                
Schedule of Equity Method Investments [Line Items]                                
Payments to acquire investments $ 6,100.0                              
Warrant | November 2017 Canopy Warrants                                
Schedule of Equity Method Investments [Line Items]                                
Number of common shares to be acquired upon exercise of warrants (in shares) | shares                               18,900,000
Exercise price of warrants (in C$ per share) | $ / shares     $ 12.98                          
Warrant | November 2018 Canopy Warrants                                
Schedule of Equity Method Investments [Line Items]                                
Number of common shares to be acquired upon exercise of warrants (in shares) | shares           139,700,000 139,700,000                  
Warrant | Tranche A Warrants                                
Schedule of Equity Method Investments [Line Items]                                
Number of common shares to be acquired upon exercise of warrants (in shares) | shares       88,500,000 88,500,000                      
Warrant | Tranche B Warrants                                
Schedule of Equity Method Investments [Line Items]                                
Number of common shares to be acquired upon exercise of warrants (in shares) | shares       38,400,000 38,400,000                      
Warrant | Tranche C Warrants                                
Schedule of Equity Method Investments [Line Items]                                
Number of common shares to be acquired upon exercise of warrants (in shares) | shares       12,800,000 12,800,000