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Total Invested Assets and Related Net Investment Income - Assets and Liabilities Carried at Fair Value on a Recurring Basis by Hierarchy (Details) - CAD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets $ 333,241 $ 323,608 $ 349,144
Liabilities 309,041 300,721 326,938
Notional amount 162,948 157,035 174,499
Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 14,145 14,421  
Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 40,455 36,832  
Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 54,600 51,253  
Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 299,023 290,188  
Liabilities 114,192 107,265  
Recurring fair value measurement | Obligations for securities borrowing      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 223 73  
Recurring fair value measurement | Derivative liabilities – FVTPL      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 1,311 2,351  
Recurring fair value measurement | Investment contract liabilities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 109,411 102,153  
Recurring fair value measurement | Other liabilities – obligations for securities borrowing      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 3,247 2,688  
Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 34,996 40,936  
Liabilities 13 10  
Level 1 | Recurring fair value measurement | Obligations for securities borrowing      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 3 0  
Level 1 | Recurring fair value measurement | Derivative liabilities – FVTPL      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 10 10  
Level 1 | Recurring fair value measurement | Investment contract liabilities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 0 0  
Level 1 | Recurring fair value measurement | Other liabilities – obligations for securities borrowing      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 0 0  
Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 245,063 230,277  
Liabilities 4,768 5,102  
Level 2 | Recurring fair value measurement | Obligations for securities borrowing      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 220 73  
Level 2 | Recurring fair value measurement | Derivative liabilities – FVTPL      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 1,301 2,341  
Level 2 | Recurring fair value measurement | Investment contract liabilities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 0 0  
Level 2 | Recurring fair value measurement | Other liabilities – obligations for securities borrowing      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 3,247 2,688  
Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 18,964 18,975  
Liabilities 109,411 102,153  
Notional amount 18,964 18,975 26,013
Level 3 | Recurring fair value measurement | Obligations for securities borrowing      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 0 0  
Level 3 | Recurring fair value measurement | Derivative liabilities – FVTPL      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 0 0  
Level 3 | Recurring fair value measurement | Investment contract liabilities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 109,411 102,153  
Level 3 | Recurring fair value measurement | Other liabilities – obligations for securities borrowing      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 0 0  
Canadian federal government      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 6,010 5,611  
Canadian provincial and municipal government      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 14,251 13,665  
Corporate      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 40,129 41,310  
Debt securities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 75,493 75,902  
Retail | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,558 2,819  
Office | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,754 3,014  
Multi-family residential | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 4,839 5,014  
Industrial | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,954 2,665  
Other | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,040 909  
Cash, cash equivalents and short-term securities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 13,173 11,219  
Cash, cash equivalents and short-term securities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 13,173 11,219  
Cash, cash equivalents and short-term securities | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 12,316 10,622  
Cash, cash equivalents and short-term securities | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 857 597  
Cash, cash equivalents and short-term securities | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 0 0  
Equity securities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 7,138 7,148  
Derivative investments      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,183 2,095  
Derivative investments | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 2,183 2,095  
Derivative investments | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 23 37  
Derivative investments | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 2,160 2,058  
Derivative investments | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 0 0  
Other financial invested assets | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 6,883 6,538  
Other financial invested assets | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 608 789  
Other financial invested assets | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 201 194  
Other financial invested assets | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 6,074 5,555  
Other financial invested assets (CLOs)      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 3,478 2,880  
Other financial invested assets (CLOs) | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 3,478 2,880  
Other financial invested assets (CLOs) | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 0 0  
Other financial invested assets (CLOs) | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 3,478 2,880  
Other financial invested assets (CLOs) | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 0 0  
Investment properties | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 9,723 10,102  
Investment properties | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 0 0  
Investment properties | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 0 0  
Investment properties | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 9,723 10,102  
Total invested assets measured at fair value | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 170,571 164,896  
Total invested assets measured at fair value | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 18,382 17,003  
Total invested assets measured at fair value | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 133,566 129,549  
Total invested assets measured at fair value | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 18,623 18,344  
Investments for account of segregated fund holders | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 128,452 125,292  
Investments for account of segregated fund holders | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 16,614 23,933  
Investments for account of segregated fund holders | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 111,497 100,728  
Investments for account of segregated fund holders | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 341 631  
FVTPL | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 12,060 11,952  
FVTPL | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 38,492 35,256  
FVTPL | Recurring fair value measurement | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 38,492 35,256  
FVTPL | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 50,552 47,208  
FVTPL | Level 1 | Recurring fair value measurement | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Level 1 | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Level 2 | Recurring fair value measurement | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 36,448 33,217  
FVTPL | Level 2 | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 48,496 45,154  
FVTPL | Level 3 | Recurring fair value measurement | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,044 2,039  
FVTPL | Level 3 | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,056 2,054  
FVTPL | Canadian federal government      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 5,161 3,696  
FVTPL | Canadian federal government | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 5,161 3,696  
FVTPL | Canadian federal government | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Canadian federal government | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 5,147 3,684  
FVTPL | Canadian federal government | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 14 12  
FVTPL | Canadian provincial and municipal government      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 13,694 12,612  
FVTPL | Canadian provincial and municipal government | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 13,694 12,612  
FVTPL | Canadian provincial and municipal government | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Canadian provincial and municipal government | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 13,694 12,612  
FVTPL | Canadian provincial and municipal government | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | U.S. government and agency | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 712 759  
FVTPL | U.S. government and agency | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 564 650  
FVTPL | U.S. government and agency | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 148 109  
FVTPL | U.S. government and agency | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Other foreign government | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 3,329 3,755  
FVTPL | Other foreign government | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Other foreign government | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 3,329 3,755  
FVTPL | Other foreign government | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Corporate      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 32,149 32,862  
FVTPL | Corporate | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 32,149 32,862  
FVTPL | Corporate | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Corporate | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 31,809 32,566  
FVTPL | Corporate | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 340 296  
FVTPL | Corporate | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,034 1,912  
FVTPL | Corporate | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Corporate | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,029 1,856  
FVTPL | Corporate | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 5 56  
FVTPL | Residential mortgage-backed securities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,335 2,323  
FVTPL | Residential mortgage-backed securities | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Residential mortgage-backed securities | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,335 2,323  
FVTPL | Residential mortgage-backed securities | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Collateralized debt obligations | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 188 189  
FVTPL | Collateralized debt obligations | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Collateralized debt obligations | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 188 189  
FVTPL | Collateralized debt obligations | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Other | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,578 1,249  
FVTPL | Other | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Other | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,535 1,219  
FVTPL | Other | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 43 30  
FVTPL | Debt securities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 61,180 59,357  
FVTPL | Debt securities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 61,180 59,357  
Notional amount 61,180 59,357  
FVTPL | Debt securities | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 564 650  
Notional amount 564 650  
FVTPL | Debt securities | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 60,214 58,313  
Notional amount 60,214 58,313  
FVTPL | Debt securities | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 402 394  
Notional amount 402 394  
FVTPL | Retail | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,536 2,779  
FVTPL | Retail | Level 1 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Retail | Level 2 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,524 2,764  
FVTPL | Retail | Level 3 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 12 15  
FVTPL | Office | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,717 2,958  
FVTPL | Office | Level 1 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Office | Level 2 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,717 2,958  
FVTPL | Office | Level 3 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Multi-family residential | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,986 2,915  
FVTPL | Multi-family residential | Level 1 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Multi-family residential | Level 2 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,986 2,915  
FVTPL | Multi-family residential | Level 3 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Industrial | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,804 2,482  
FVTPL | Industrial | Level 1 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Industrial | Level 2 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,804 2,482  
FVTPL | Industrial | Level 3 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Other | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,017 818  
FVTPL | Other | Level 1 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Other | Level 2 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,017 818  
FVTPL | Other | Level 3 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVTPL | Equity securities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 7,070 7,148  
FVTPL | Equity securities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 7,070 7,148  
FVTPL | Equity securities | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 4,220 4,133  
FVTPL | Equity securities | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 2,737 2,844  
FVTPL | Equity securities | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 113 171  
FVTPL | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 50,552 47,208  
FVTPL | Mortgages and loans | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 50,552 47,208  
FVTPL | Mortgages and loans | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 0 0  
FVTPL | Mortgages and loans | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 48,496 45,154  
FVTPL | Mortgages and loans | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 2,056 2,054  
FVTPL | Other financial invested assets      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 6,883 6,538  
FVOCI | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 291 528  
FVOCI | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,657 1,276  
FVOCI | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,948    
FVOCI | Recurring fair value measurement | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,657 1,276  
FVOCI | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,948 1,804  
FVOCI | Level 1 | Recurring fair value measurement | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Level 1 | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Level 2 | Recurring fair value measurement | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,657 1,260  
FVOCI | Level 2 | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,948 1,788  
FVOCI | Level 3 | Recurring fair value measurement | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 16  
FVOCI | Level 3 | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 16  
FVOCI | Canadian federal government      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 849 1,915  
FVOCI | Canadian federal government | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 849 1,915  
FVOCI | Canadian federal government | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Canadian federal government | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 849 1,915  
FVOCI | Canadian federal government | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Canadian provincial and municipal government      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 557 1,053  
FVOCI | Canadian provincial and municipal government | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 557 1,053  
FVOCI | Canadian provincial and municipal government | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Canadian provincial and municipal government | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 557 1,053  
FVOCI | Canadian provincial and municipal government | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | U.S. government and agency | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 658 778  
FVOCI | U.S. government and agency | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 651 772  
FVOCI | U.S. government and agency | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 7 6  
FVOCI | U.S. government and agency | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Other foreign government | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 473 869  
FVOCI | Other foreign government | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Other foreign government | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 462 858  
FVOCI | Other foreign government | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 11 11  
FVOCI | Corporate      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 7,980 8,448  
FVOCI | Corporate | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 7,980 8,448  
FVOCI | Corporate | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Corporate | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 7,905 8,415  
FVOCI | Corporate | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 75 33  
FVOCI | Corporate | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,017 965  
FVOCI | Corporate | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Corporate | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,017 965  
FVOCI | Corporate | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Residential mortgage-backed securities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 944 722  
FVOCI | Residential mortgage-backed securities | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Residential mortgage-backed securities | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 944 722  
FVOCI | Residential mortgage-backed securities | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Collateralized debt obligations | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 780 857  
FVOCI | Collateralized debt obligations | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Collateralized debt obligations | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 767 857  
FVOCI | Collateralized debt obligations | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 13 0  
FVOCI | Other | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,055 938  
FVOCI | Other | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Other | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 967 930  
FVOCI | Other | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 88 8  
FVOCI | Debt securities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 14,313 16,545  
FVOCI | Debt securities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 14,313 16,545  
Notional amount 14,313 16,545  
FVOCI | Debt securities | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 651 772  
Notional amount 651 772  
FVOCI | Debt securities | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 13,475 15,721  
Notional amount 13,475 15,721  
FVOCI | Debt securities | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 187 52  
Notional amount 187 52  
FVOCI | Retail | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 22 40  
FVOCI | Retail | Level 1 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Retail | Level 2 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 22 40  
FVOCI | Retail | Level 3 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Office | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 37 51  
FVOCI | Office | Level 1 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Office | Level 2 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 37 51  
FVOCI | Office | Level 3 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Multi-family residential | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 83 197  
FVOCI | Multi-family residential | Level 1 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Multi-family residential | Level 2 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 83 197  
FVOCI | Multi-family residential | Level 3 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Industrial | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 149 178  
FVOCI | Industrial | Level 1 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Industrial | Level 2 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 149 178  
FVOCI | Industrial | Level 3 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Other | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 62  
FVOCI | Other | Level 1 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Other | Level 2 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 62  
FVOCI | Other | Level 3 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 0  
FVOCI | Equity securities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 68 0  
FVOCI | Equity securities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 68  
FVOCI | Equity securities | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 0  
FVOCI | Equity securities | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 0  
FVOCI | Equity securities | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 68  
FVOCI | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,948 1,804  
FVOCI | Mortgages and loans | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 1,948 1,804  
FVOCI | Mortgages and loans | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 0 0  
FVOCI | Mortgages and loans | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 1,948 1,788  
FVOCI | Mortgages and loans | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 0 16  
Debt securities | FVTPL | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 402 394 152
Debt securities | FVOCI | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 187 52 53
Equity securities | FVTPL | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 113 101 170
Equity securities | FVOCI | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 68 70  
Mortgages and loans | FVTPL | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,056 2,054 12,251
Mortgages and loans | FVOCI | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 16 17
Other financial invested assets | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 6,074 5,555 3,650
Investment properties | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 9,723 10,102 9,109
Total invested assets measured at fair value | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 18,623 18,344 25,402
Investments for account of segregated fund holders | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount $ 341 $ 631 $ 611