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Goodwill and Intangible Assets - Summary of Carrying Amounts of Goodwill and Intangible Assets (Parenthetical) (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Nov. 30, 2022
Dec. 31, 2022
Dec. 31, 2023
Dec. 31, 2021
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Intangible assets ending balance   $ 4,505 $ 4,391 $ 4,264
Goodwill recognized   255    
Manulife TEDA Fund Management [Member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Cash transferred $ 334      
Fair value of joint venture interest valued 321      
Goodwill recognized $ 255      
Percentage of voting equity interests acquired 51.00%      
Manulife TEDA Fund Management [Member] | Indefinite Life Fund Management Contracts [Member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Acquisitions through business combinations, intangible assets other than goodwill $ 185      
Manulife TEDA Fund Management [Member] | Distribution networks [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Acquisitions through business combinations, intangible assets other than goodwill 52      
Manulife TEDA Fund Management [Member] | Finite Life Management Contracts [Member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Acquisitions through business combinations, intangible assets other than goodwill $ 3      
Software [Member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Intangible assets ending balance   1,068 1,102 1,091
Distribution networks [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Intangible assets ending balance   881 834 888
Customer relationships [Member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Intangible assets ending balance   643 582 687
Other [Member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Intangible assets ending balance   52 48 49
Fund management contracts and other [Member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Intangible assets ending balance   1,048 1,034 $ 788
US wealth and asset management [member] | Fund management contracts and other [Member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Intangible assets ending balance   273 273  
Canada wealth and asset management [member] | Fund management contracts and other [Member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Intangible assets ending balance   397 386  
Gross Carrying Value [Member] | Software [Member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Gross carrying amount of finite life intangible assets   2,736 2,955  
Gross Carrying Value [Member] | Distribution networks [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Gross carrying amount of finite life intangible assets   1,517 1,511  
Gross Carrying Value [Member] | Customer relationships [Member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Gross carrying amount of finite life intangible assets   1,146 1,136  
Gross Carrying Value [Member] | Other [Member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]        
Gross carrying amount of finite life intangible assets   $ 136 $ 138