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Share Capital and Warrants - Additional Information (Detail) - $ / shares
 3 Months Ended 9 Months Ended 60 Months Ended
Dec. 29, 2021
Sep. 29, 2021
Mar. 31, 2021
Sep. 30, 2021
Mar. 30, 2026
Dec. 31, 2020
Disclosure of classes of share capital [Line Items]            
Maximum percentage of preferred stock upon issuance or outstanding of common stock       20.00%    
Stock Option Plan            
Disclosure of classes of share capital [Line Items]            
Shares available for future issuance (in shares)       30,000,000   27,000,000
Preferred Shares            
Disclosure of classes of share capital [Line Items]            
Shares outstanding (in shares)       36,000,000   0
Preferred Shares | Series 1 First Preferred Shares            
Disclosure of classes of share capital [Line Items]            
Preference shares converted from Series 1 to Series 2     274,000      
Redeemable preferred shares, conversion term     5 years      
Dividend Rate     2.40% 2.58% 2.58%  
Shares outstanding (in shares)       10,740,000    
Preferred Shares | Series 1 First Preferred Shares | Government of Canada Bond            
Disclosure of classes of share capital [Line Items]            
Dividend Rate         0.85%  
Dividend rate, basis spread     1.73%      
Preferred Shares | Series 2 First Preferred Shares            
Disclosure of classes of share capital [Line Items]            
Dividend Rate 1.92% 1.84%   1.92%    
Preference shares converted from Series 2 to Series 1     578,000      
Shares outstanding (in shares)       1,260,000    
Preferred Shares | Series 2 First Preferred Shares | Government of Canada Bond            
Disclosure of classes of share capital [Line Items]            
Dividend rate, basis spread     1.73%      
Preferred Shares | Series 3 First Preferred Shares            
Disclosure of classes of share capital [Line Items]            
Redeemable preferred shares, conversion term       5 years    
Dividend Rate       4.69%    
Dividend yield, term two       5 years    
Shares outstanding (in shares)       10,000,000    
Preferred Shares | Series 3 First Preferred Shares | Government of Canada Bond            
Disclosure of classes of share capital [Line Items]            
Dividend rate, basis spread       3.13%    
Preferred Shares | Series 3 First Preferred Shares | 90-Day Government of Canada Treasury Bills            
Disclosure of classes of share capital [Line Items]            
Dividend rate, basis spread       3.13%    
Preferred Shares | Series 5 First Preferred Shares            
Disclosure of classes of share capital [Line Items]            
Redeemable preferred shares, conversion term       5 years    
Dividend Rate       4.59%    
Dividend yield, term two       5 years    
Shares outstanding (in shares)       8,000,000    
Preferred Shares | Series 5 First Preferred Shares | Government of Canada Bond            
Disclosure of classes of share capital [Line Items]            
Dividend rate, basis spread       3.57%    
Preferred Shares | Series 5 First Preferred Shares | 90-Day Government of Canada Treasury Bills            
Disclosure of classes of share capital [Line Items]            
Dividend rate, basis spread       3.57%    
Preferred Shares | Series 7 First Preferred Shares            
Disclosure of classes of share capital [Line Items]            
Redeemable preferred shares, conversion term       5 years    
Dividend Rate       3.94%    
Dividend yield, term two       5 years    
Shares outstanding (in shares)       6,000,000    
Preferred Shares | Series 7 First Preferred Shares | Government of Canada Bond            
Disclosure of classes of share capital [Line Items]            
Dividend rate, basis spread       3.52%    
Preferred Shares | Series 7 First Preferred Shares | 90-Day Government of Canada Treasury Bills            
Disclosure of classes of share capital [Line Items]            
Dividend rate, basis spread       3.52%    
Second Preferred Shares            
Disclosure of classes of share capital [Line Items]            
Shares outstanding (in shares)       0   0
Share Purchase Warrants            
Disclosure of classes of share capital [Line Items]            
Shares outstanding (in shares)       65,219,000   0
Exercise price of warrants issued (in CAD per share)       $ 6.54