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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, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets $ 370,721 $ 333,241  
Liabilities 344,592 309,041  
Notional amount 178,698 162,948  
Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 14,438 14,145  
Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 43,181 40,455  
Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 57,619 54,600  
Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 334,913 299,023  
Liabilities 136,033 114,192  
Recurring fair value measurement | Obligations for securities borrowing      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 239 223  
Recurring fair value measurement | Derivative liabilities – FVTPL      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 2,077 1,311  
Recurring fair value measurement | Other financial liabilities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 5,028 3,247  
Recurring fair value measurement | Investment contract liabilities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 128,689 109,411  
Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 38,682 34,996  
Liabilities 32 13  
Level 1 | Recurring fair value measurement | Obligations for securities borrowing      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 4 3  
Level 1 | Recurring fair value measurement | Derivative liabilities – FVTPL      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 28 10  
Level 1 | Recurring fair value measurement | Other financial liabilities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 0 0  
Level 1 | 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      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 276,336 245,063  
Liabilities 7,312 4,768  
Level 2 | Recurring fair value measurement | Obligations for securities borrowing      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 235 220  
Level 2 | Recurring fair value measurement | Derivative liabilities – FVTPL      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 2,049 1,301  
Level 2 | Recurring fair value measurement | Other financial liabilities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 5,028 3,247  
Level 2 | Recurring fair value measurement | Investment contract liabilities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Liabilities 0 0  
Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 19,895 18,964  
Liabilities 128,689 109,411  
Notional amount 19,895 18,964 $ 18,975
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 | Other financial liabilities      
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 128,689 109,411  
Canadian federal government      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 7,537 6,010  
Canadian provincial and municipal government      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 15,655 14,251  
Corporate      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 41,013 40,129  
Debt securities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 81,955 75,493  
Retail | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,567 2,558  
Office | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,633 2,754  
Multi-family residential | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 4,499 4,839  
Industrial | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 3,683 2,954  
Other | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,056 1,040  
Cash, cash equivalents and short-term securities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 13,873 13,173  
Cash, cash equivalents and short-term securities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 13,873 13,173  
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 13,243 12,316  
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 630 857  
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 9,974 7,138  
Derivatives      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,971 2,183  
Derivatives | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 1,971 2,183  
Derivatives | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 28 23  
Derivatives | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 1,943 2,160  
Derivatives | 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 7,950 6,883  
Other financial invested assets | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 859 608  
Other financial invested assets | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 211 201  
Other financial invested assets | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 6,880 6,074  
Other financial invested assets (CLOs)      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 5,356 3,478  
Other financial invested assets (CLOs) | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 5,356 3,478  
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 5,356 3,478  
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 9,290 9,723  
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 9,290 9,723  
Total invested assets measured at fair value | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 186,127 170,571  
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 21,429 18,382  
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 145,262 133,566  
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 19,436 18,623  
Investments for account of segregated fund holders | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 148,786 128,452  
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 17,253 16,614  
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 131,074 111,497  
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 459 341  
FVTPL | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 12,466 12,060  
FVTPL | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 40,767 38,492  
FVTPL | Recurring fair value measurement | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 40,767 38,492  
FVTPL | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 53,233 50,552  
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 38,491 36,448  
FVTPL | Level 2 | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 50,933 48,496  
FVTPL | Level 3 | Recurring fair value measurement | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,276 2,044  
FVTPL | Level 3 | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,300 2,056  
FVTPL | Canadian federal government      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 6,803 5,161  
FVTPL | Canadian federal government | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 6,803 5,161  
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 6,790 5,147  
FVTPL | Canadian federal government | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 13 14  
FVTPL | Canadian provincial and municipal government      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 15,302 13,694  
FVTPL | Canadian provincial and municipal government | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 15,302 13,694  
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 15,302 13,694  
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 626 712  
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 463 564  
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 163 148  
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 3,796 3,329  
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 3,762 3,329  
FVTPL | Other foreign government | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 34 0  
FVTPL | Corporate      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 33,394 32,149  
FVTPL | Corporate | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 33,394 32,149  
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 32,929 31,809  
FVTPL | Corporate | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 465 340  
FVTPL | Corporate | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,163 2,034  
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 2,163 2,029  
FVTPL | Corporate | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 5  
FVTPL | Residential mortgage-backed securities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 3,539 2,335  
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 3,539 2,335  
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 353 188  
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 352 188  
FVTPL | Collateralized debt obligations | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1 0  
FVTPL | Other | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,130 1,578  
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 2,126 1,535  
FVTPL | Other | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 4 43  
FVTPL | Debt securities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 68,106 61,180  
FVTPL | Debt securities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 68,106 61,180  
Notional amount 68,106 61,180  
FVTPL | Debt securities | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 463 564  
Notional amount 463 564  
FVTPL | Debt securities | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 67,126 60,214  
Notional amount 67,126 60,214  
FVTPL | Debt securities | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 517 402  
Notional amount 517 402  
FVTPL | Retail | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,484 2,536  
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 2,472 2,524  
FVTPL | Retail | Level 3 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 12 12  
FVTPL | Office | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,614 2,717  
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 2,602 2,717  
FVTPL | Office | Level 3 | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 12 0  
FVTPL | Multi-family residential | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,887 2,986  
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 2,887 2,986  
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 3,447 2,804  
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 3,447 2,804  
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 1,034 1,017  
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 1,034 1,017  
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 9,900 7,070  
FVTPL | Equity securities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 9,900 7,070  
FVTPL | Equity securities | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 6,331 4,220  
FVTPL | Equity securities | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 3,358 2,737  
FVTPL | Equity securities | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 211 113  
FVTPL | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 53,233 50,552  
FVTPL | Mortgages and loans | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 53,233 50,552  
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 50,933 48,496  
FVTPL | Mortgages and loans | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 2,300 2,056  
FVTPL | Other financial invested assets      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 7,950 6,883  
FVOCI | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 417 291  
FVOCI | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,108 1,657  
FVOCI | Recurring fair value measurement | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,108 1,657  
FVOCI | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,525 1,948  
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 2,095 1,657  
FVOCI | Level 2 | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,512 1,948  
FVOCI | Level 3 | Recurring fair value measurement | Loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 13 0  
FVOCI | Level 3 | Recurring fair value measurement | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 13 0  
FVOCI | Canadian federal government      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 734 849  
FVOCI | Canadian federal government | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 734 849  
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 734 849  
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 353 557  
FVOCI | Canadian provincial and municipal government | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 353 557  
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 353 557  
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 509 658  
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 501 651  
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 8 7  
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 413 473  
FVOCI | Other foreign government | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 4 0  
FVOCI | Other foreign government | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 397 462  
FVOCI | Other foreign government | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 12 11  
FVOCI | Corporate      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 7,619 7,980  
FVOCI | Corporate | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 7,619 7,980  
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 7,529 7,905  
FVOCI | Corporate | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 90 75  
FVOCI | Corporate | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,084 1,017  
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 1,084 1,017  
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 1,170 944  
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 1,159 944  
FVOCI | Residential mortgage-backed securities | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 11 0  
FVOCI | Collateralized debt obligations | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 711 780  
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 673 767  
FVOCI | Collateralized debt obligations | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 38 13  
FVOCI | Other | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 1,256 1,055  
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 1,256 967  
FVOCI | Other | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 0 88  
FVOCI | Debt securities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 13,849 14,313  
FVOCI | Debt securities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 13,849 14,313  
Notional amount 13,849 14,313  
FVOCI | Debt securities | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 505 651  
Notional amount 505 651  
FVOCI | Debt securities | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 13,193 13,475  
Notional amount 13,193 13,475  
FVOCI | Debt securities | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 151 187  
Notional amount 151 187  
FVOCI | Retail | Recurring fair value measurement | Mortgages      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 83 22  
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 83 22  
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 19 37  
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 19 37  
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 79 83  
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 79 83  
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 236 149  
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 236 149  
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 | Equity securities      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 74 68  
FVOCI | Equity securities | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 74 68  
FVOCI | Equity securities | Level 1 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 0 0  
FVOCI | Equity securities | Level 2 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 0 0  
FVOCI | Equity securities | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 74 68  
FVOCI | Mortgages and loans      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 2,525 1,948  
FVOCI | Mortgages and loans | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 2,525 1,948  
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 2,512 1,948  
FVOCI | Mortgages and loans | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Assets 13 0  
Debt securities | FVTPL | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 517 402 394
Debt securities | FVOCI | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 151 187 52
Equity securities | FVTPL | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 211 113 101
Equity securities | FVOCI | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 74 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 2,300 2,056 2,054
Mortgages and loans | FVOCI | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 13 0 16
Other financial invested assets | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 6,880 6,074 5,555
Investment properties | Level 3 | Recurring fair value measurement      
Disclosure Of Fair Value Measurement of Assets and Liabilities [Line Items]      
Notional amount 9,290 9,723 10,102
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 19,436 18,623 18,344
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 $ 459 $ 341 $ 631