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Information Provided in Connection with Investments in Deferred Annuity Contracts and SignatureNotes Issued or Assumed by John Hancock Life Insurance Company (U.S.A.) - Summary of Condensed Consolidated Statement of Income (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Insurance service result |  |
Insurance revenue | $ 23,972 | $ 23,118
Insurance service expenses | (19,382) | (19,335)
Net expenses from reinsurance contracts held | (613) | (623)
Total insurance service result | 3,977 | 3,160
Investment result |  |
Net investment income (loss) | 18,021 | 337
Insurance/reinsurance finance income (expenses) | (14,628) | (6,307)
Other investment result | (435) | (399)
Total investment result | 2,958 | (6,369)
Other revenue | 6,746 | 6,186
Other expenses | (5,675) | (5,064)
Interest expenses | (1,554) | (1,051)
Net income (loss) before income taxes | 6,452 | (3,138)
Income tax (expenses) recoveries | (845) | 1,159
Net income (loss) after income taxes | 5,607 | (1,979)
Equity in net income (loss) of unconsolidated subsidiaries | 0 |
Net income (loss) | 5,607 | (1,979)
Net income (loss) attributed to: |  |
Non-controlling interests | 144 | 121
Participating policyholders | 360 | (167)
Shareholders and other equity holders | 5,103 | (1,933)
Net income | 5,607 | (1,979)
Consolidation adjustments [Member] |  |
Insurance service result |  |
Insurance revenue | (1,640) | (1,588)
Insurance service expenses | 1,741 | 3,734
Net expenses from reinsurance contracts held | (123) | (334)
Total insurance service result | (22) | 1,812
Investment result |  |
Net investment income (loss) | (1,028) | (945)
Insurance/reinsurance finance income (expenses) | 88 | (1,606)
Other investment result | (103) | (9)
Total investment result | (1,043) | (2,560)
Other revenue | (442) | (464)
Other expenses | 268 | 274
Interest expenses | 1,239 | 938
Net income (loss) before income taxes | 0 |
Income tax (expenses) recoveries | 0 |
Net income (loss) after income taxes | 0 |
Equity in net income (loss) of unconsolidated subsidiaries | (6,552) | 2,110
Net income (loss) | (6,552) | 2,110
Net income (loss) attributed to: |  |
Non-controlling interests | 0 |
Participating policyholders | 74 | 75
Shareholders and other equity holders | (6,626) | 2,035
Net income | (6,552) | 2,110
MFC (Guarantor) [Member] |  |
Insurance service result |  |
Insurance revenue | 0 |
Insurance service expenses | 0 |
Net expenses from reinsurance contracts held | 0 |
Total insurance service result | 0 |
Investment result |  |
Net investment income (loss) | 638 | 554
Insurance/reinsurance finance income (expenses) | 0 |
Other investment result | 0 |
Total investment result | 638 | 554
Other revenue | 14 | (36)
Other expenses | (55) | (42)
Interest expenses | (433) | (439)
Net income (loss) before income taxes | 164 | 37
Income tax (expenses) recoveries | 7 | 32
Net income (loss) after income taxes | 171 | 69
Equity in net income (loss) of unconsolidated subsidiaries | 4,932 | (2,002)
Net income (loss) | 5,103 | (1,933)
Net income (loss) attributed to: |  |
Non-controlling interests | 0 |
Participating policyholders | 0 |
Shareholders and other equity holders | 5,103 | (1,933)
Net income | 5,103 | (1,933)
JHUSA (Issuer) [Member] |  |
Insurance service result |  |
Insurance revenue | 9,858 | 9,946
Insurance service expenses | (8,928) | (10,652)
Net expenses from reinsurance contracts held | (315) | (570)
Total insurance service result | 615 | (1,276)
Investment result |  |
Net investment income (loss) | 4,232 | (53)
Insurance/reinsurance finance income (expenses) | (4,723) | (325)
Other investment result | 100 | 36
Total investment result | (391) | (342)
Other revenue | 790 | 505
Other expenses | (1,112) | (841)
Interest expenses | (79) | (54)
Net income (loss) before income taxes | (177) | (2,008)
Income tax (expenses) recoveries | 175 | 624
Net income (loss) after income taxes | (2) | (1,384)
Equity in net income (loss) of unconsolidated subsidiaries | 811 | 638
Net income (loss) | 809 | (746)
Net income (loss) attributed to: |  |
Non-controlling interests | 0 |
Participating policyholders | (74) | (530)
Shareholders and other equity holders | 883 | (216)
Net income | 809 | (746)
Other subsidiaries [Member] |  |
Insurance service result |  |
Insurance revenue | 15,754 | 14,760
Insurance service expenses | (12,195) | (12,417)
Net expenses from reinsurance contracts held | (175) | 281
Total insurance service result | 3,384 | 2,624
Investment result |  |
Net investment income (loss) | 14,179 | 781
Insurance/reinsurance finance income (expenses) | (9,993) | (4,376)
Other investment result | (432) | (426)
Total investment result | 3,754 | (4,021)
Other revenue | 6,384 | 6,181
Other expenses | (4,776) | (4,455)
Interest expenses | (2,281) | (1,496)
Net income (loss) before income taxes | 6,465 | (1,167)
Income tax (expenses) recoveries | (1,027) | 503
Net income (loss) after income taxes | 5,438 | (664)
Equity in net income (loss) of unconsolidated subsidiaries | 809 | (746)
Net income (loss) | 6,247 | (1,410)
Net income (loss) attributed to: |  |
Non-controlling interests | 144 | 121
Participating policyholders | 360 | 288
Shareholders and other equity holders | 5,743 | (1,819)
Net income | $ 6,247 | $ (1,410)

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Namespace Prefix: | mfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Profit loss attributable to participating policyholders. + References No definition available. + Details
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Namespace Prefix: | mfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
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