Annual report pursuant to Section 13 and 15(d)

Fair Value of Financial Instruments - Fair Value Measurement Inputs (Details)

v3.23.1
Fair Value of Financial Instruments - Fair Value Measurement Inputs (Details)
$ / shares in Units, $ in Millions
 1 Months Ended 12 Months Ended
Feb. 28, 2022
$ / shares
Feb. 28, 2021
Jun. 30, 2018
Feb. 28, 2023
CAD ($)
$ / shares
shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Common shares to be repurchased for cancellation under share repurchase credit feature (in shares) | shares       27,378,866
Convertible debt securities [Member] | Unsecured debt        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Weighted average remaining term     5 years  
Tranche B Warrants and Tranche C Warrants | Maximum        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Dollar value of common shares to be repurchased for cancellation under share repurchase credit feature | $       $ 1,583.0
Significant Other Observable Inputs (Level 2) | Warrants | Tranche A Warrants | Exercise price        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Warrants outstanding, measurement input (in CAD per share) $ 50.40     $ 50.40
Significant Other Observable Inputs (Level 2) | Warrants | Tranche A Warrants | Valuation date stock price        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Warrants outstanding, measurement input (in CAD per share) $ 9.04     $ 3.17
Significant Other Observable Inputs (Level 2) | Warrants | Tranche A Warrants | Remaining term        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Warrants outstanding, term 1 year 8 months 12 days     8 months 12 days
Significant Other Observable Inputs (Level 2) | Warrants | Tranche A Warrants | Expected volatility        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Warrants outstanding, measurement input, decimal 0.750     1.000
Significant Other Observable Inputs (Level 2) | Warrants | Tranche A Warrants | Risk-free interest rate        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Warrants outstanding, measurement input, decimal 0.014     0.046
Significant Other Observable Inputs (Level 2) | Warrants | Tranche A Warrants | Expected dividend yield        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Warrants outstanding, measurement input, decimal 0.000     0.000
Significant Other Observable Inputs (Level 2) | Warrants | Tranche B Warrants | Exercise price        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Warrants outstanding, measurement input (in CAD per share) $ 76.68     $ 76.68
Significant Other Observable Inputs (Level 2) | Warrants | Tranche B Warrants | Valuation date stock price        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Warrants outstanding, measurement input (in CAD per share) $ 9.04     $ 3.17
Significant Other Observable Inputs (Level 2) | Warrants | Tranche B Warrants | Remaining term        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Warrants outstanding, term 4 years 8 months 12 days     3 years 8 months 12 days
Significant Other Observable Inputs (Level 2) | Warrants | Tranche B Warrants | Expected volatility        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Warrants outstanding, measurement input, decimal 0.750     1.000
Significant Other Observable Inputs (Level 2) | Warrants | Tranche B Warrants | Risk-free interest rate        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Warrants outstanding, measurement input, decimal 0.017     0.037
Significant Other Observable Inputs (Level 2) | Warrants | Tranche B Warrants | Expected dividend yield        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Warrants outstanding, measurement input, decimal 0.000     0.000
Significant Other Observable Inputs (Level 2) | Convertible debt securities [Member] | Conversion price        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Debt instrument, measurement input (in CAD per share) $ 48.17     $ 48.17
Significant Other Observable Inputs (Level 2) | Convertible debt securities [Member] | Valuation date stock price        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Debt instrument, measurement input (in CAD per share) $ 9.04     $ 3.17
Significant Other Observable Inputs (Level 2) | Convertible debt securities [Member] | Remaining term        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Weighted average remaining term 4 months 24 days 1 year 4 months 24 days    
Significant Other Observable Inputs (Level 2) | Convertible debt securities [Member] | Expected volatility        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Debt instrument, measurement input, decimal 0.750     1.000
Significant Other Observable Inputs (Level 2) | Convertible debt securities [Member] | Risk-free interest rate        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Debt instrument, measurement input, decimal 0.014     0.046
Significant Other Observable Inputs (Level 2) | Convertible debt securities [Member] | Expected dividend yield        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Debt instrument, measurement input, decimal 0.000     0.000