XML 118 R84.htm IDEA: XBRL DOCUMENT v3.22.0.1
Insurance Contract Liabilities and Reinsurance Assets - Additional Information (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Nov. 15, 2021
Jul. 01, 2020
Dec. 31, 2021
Dec. 31, 2020
Disclosure of insurance contract liabilities and reinsurance assets [line items]        
Fair value of assets backing net insurance contract liabilities excluding reinsurance assets     $ 354,587 $ 350,264
Fair value of assets backing capital and other liabilities     571,431 543,273
Change in insurance and investment contract liabilities     287 563
Change in net income attributed to shareholders (post-tax)     (41) (198)
Increase of reinsurance assets     754 (2,374)
John Hancock Life Insurance Company [Member]        
Disclosure of insurance contract liabilities and reinsurance assets [line items]        
Coinsurance transaction estimated after tax gain $ 750      
John Hancock Life Insurance Company USA [Member]        
Disclosure of insurance contract liabilities and reinsurance assets [line items]        
Ceded premiums   $ 3,300    
Increase of reinsurance assets   3,400    
Coinsurance, after tax gain   $ 262    
Jackson National Life Insurance Company [member]        
Disclosure of insurance contract liabilities and reinsurance assets [line items]        
Coinsurance, after tax gain     40  
Mortality and morbidity updates [member]        
Disclosure of insurance contract liabilities and reinsurance assets [line items]        
Change in insurance and investment contract liabilities     350 (304)
Change in net income attributed to shareholders (post-tax)     (257) 232
Lapses and policyholder behavior [member]        
Disclosure of insurance contract liabilities and reinsurance assets [line items]        
Change in insurance and investment contract liabilities     686 893
Change in net income attributed to shareholders (post-tax)     (534) (682)
Lapses and policyholder behavior [member] | U.S. [member]        
Disclosure of insurance contract liabilities and reinsurance assets [line items]        
Change in net income attributed to shareholders (post-tax)     504  
Investment return assumptions [member]        
Disclosure of insurance contract liabilities and reinsurance assets [line items]        
Change in insurance and investment contract liabilities     (257) (212)
Change in net income attributed to shareholders (post-tax)     168 31
Coinsurance, after tax gain     31  
Other updates [member]        
Disclosure of insurance contract liabilities and reinsurance assets [line items]        
Change in insurance and investment contract liabilities     110 228
Change in net income attributed to shareholders (post-tax)     119 190
Expense Updates [Member]        
Disclosure of insurance contract liabilities and reinsurance assets [line items]        
Change in insurance and investment contract liabilities     (653)  
Change in net income attributed to shareholders (post-tax)     503  
Gain To net income attributed to shareholders after tax due to scale benefits     263  
Gain To net income attributed to shareholders after tax due to reallocation of expenses and efficiency initiatives     $ 256  
Bottom of range [Member]        
Disclosure of insurance contract liabilities and reinsurance assets [line items]        
Percentage provision for adverse deviation assumptions not specifically provided     0.00%  
Top of range [Member]        
Disclosure of insurance contract liabilities and reinsurance assets [line items]        
Percentage provision for adverse deviation assumptions not specifically provided     20.00%  
MLI and John Hancock Life Insurance Company [Member]        
Disclosure of insurance contract liabilities and reinsurance assets [line items]        
Assets and insurance contract liabilities related to closed blocks participating policies     $ 29,000 $ 29,480