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Commitments and Contingencies - Summary of Condensed Consolidated Statements of Financial Position for MFC and MFLP (Detail) - CAD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Invested assets | $ 353,664 | $ 334,222 |
Total other assets | 83,398 | 71,004 |
Segregated funds net assets | 313,209 | 324,307 |
Insurance contract liabilities | 328,654 | 304,605 | $ 297,505
Investment contract liabilities | 3,265 | 3,126 |
Segregated funds net liabilities | 313,209 | 324,307 |
Total other liabilities | 57,992 | 55,332 |
MFC [Member] |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Invested assets | 21 | 21 |
Total other assets | 54,346 | 48,688 |
Total other liabilities | 8,403 | 7,696 |
MLI consolidated [Member] |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Invested assets | 353,632 | 334,191 |
Total other assets | 83,523 | 71,180 |
Segregated funds net assets | 313,209 | 324,307 |
Insurance contract liabilities | 328,654 | 304,605 |
Investment contract liabilities | 3,265 | 3,126 |
Segregated funds net liabilities | 313,209 | 324,307 |
Total other liabilities | 50,043 | 48,145 |
Other subsidiaries of MFC on a combined basis [Member] |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Invested assets | 11 | 10 |
Total other assets | 3 | 4 |
Consolidating adjustments [Member] |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Total other assets | (54,474) | (48,868) |
Total other liabilities | (454) | (509) |
Manulife Finance (Delaware), L.P.[Member] |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Invested assets | 11 | 5 |
Total other assets | 1,059 | 1,033 |
Total other liabilities | $ 833 | $ 831 |

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