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Segregated Funds - Summary of Changes in Segregated Funds Net Assets (Detail) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Net policyholder cash flow |  |
Deposits from policyholders | $ 38,898 | $ 38,561
Net transfers to general fund | (1,515) | (1,000)
Payments to policyholders | (44,818) | (49,372)
Net policyholder cash flow | (7,435) | (11,811)
Investment related |  |
Interest and dividends | 16,775 | 18,872
Net realized and unrealized investment gains (losses) | 24,514 | 37,643
Investment related | 41,289 | 56,515
Other |  |
Management and administration fees | (3,942) | (3,926)
Impact of changes in foreign exchange rates | (5,580) | (10,897)
Other | (9,522) | (14,823)
Net additions | 24,332 | 29,881
Segregated funds net assets, beginning of year | 343,477 | 313,596
Segregated funds net assets, end of year | $ 367,809 | $ 343,477

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