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v3.24.3

Consolidated Statements of Income (Loss) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Revenues |  |  |  |
Premiums | $ 1,479.2 | $ 1,431.1 | $ 4,401.0 | $ 4,222.8
Net investment income | 91.8 | 84.2 | 271.9 | 250.5
Net realized and unrealized investment gains (losses): |  |  |  |
Net realized losses from sales and other | (23.5) | (0.9) | (55.2) | (1.9)
Net change in fair value of equity securities | 11.7 | (5.2) | 19.3 | (13.4)
Impairments on investments: |  |  |  |
Credit-related impairments | (0.1) |  | (3.3) | (6.2)
Losses on intent to sell securities | (0.5) |  | (2.2) | (10.3)
Impairments on investments | (0.6) |  | (5.5) | (16.5)
Total net realized and unrealized investment losses | (12.4) | (6.1) | (41.4) | (31.8)
Fees and other income | 6.7 | 7.4 | 21.6 | 23.2
Total revenues | 1,565.3 | 1,516.6 | 4,653.1 | 4,464.7
Losses and expenses |  |  |  |
Losses and loss adjustment expenses | 954.0 | 1,061.5 | 2,896.8 | 3,218.8
Amortization of deferred acquisition costs | 307.8 | 296.6 | 910.3 | 878.1
Interest expense | 8.5 | 8.5 | 25.6 | 25.6
Other operating expenses | 165.3 | 150.9 | 494.1 | 451.3
Total losses and expenses | 1,435.6 | 1,517.5 | 4,326.8 | 4,573.8
Income (loss) from continuing operations before income taxes | 129.7 | (0.9) | 326.3 | (109.1)
Income tax expense (benefit): |  |  |  |
Current | 36.7 | (1.1) | 82.4 | (13.7)
Deferred | (9.1) | (8.0) | (14.1) | (21.6)
Total income tax expense (benefit) | 27.6 | (9.1) | 68.3 | (35.3)
Income (loss) from continuing operations | 102.1 | 8.2 | 258.0 | (73.8)
Discontinued operations (net of taxes): |  |  |  |
Net income (loss) | $ 102.1 | $ 8.6 | $ 258.1 | $ (72.6)
Basic: |  |  |  |
Income (loss) from continuing operations | $ 2.84 | $ 0.23 | $ 7.18 | $ (2.07)
Net income (loss) per share | $ 2.84 | $ 0.24 | $ 7.18 | $ (2.03)
Weighted average shares outstanding | 36.0 | 35.8 | 35.9 | 35.7
Diluted: |  |  |  |
Income (loss) from continuing operations | $ 2.80 | $ 0.23 | $ 7.09 | $ (2.07)
Net income (loss) per share | $ 2.80 | $ 0.24 | $ 7.10 | $ (2.03)
Weighted average shares outstanding | 36.5 | 36.1 | 36.4 | 35.7
Life [Member] |  |  |  |
Discontinued operations (net of taxes): |  |  |  |
Income from discontinued life businesses |  |  | $ 0.1 |
Basic: |  |  |  |
Income from discontinued life businesses | $ 0 | $ 0 | $ 0 | $ 0
Diluted: |  |  |  |
Income from discontinued life businesses |  |  | $ 0.01 |
Chaucer [Member] |  |  |  |
Discontinued operations (net of taxes): |  |  |  |
Income from discontinued life businesses |  | $ 0.4 | $ 0.0 | $ 1.2
Basic: |  |  |  |
Income from discontinued life businesses |  | $ 0.01 |  | $ 0.04
Diluted: |  |  |  |
Income from discontinued life businesses |  | $ 0.01 |  | $ 0.04

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Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=thg_ChaucerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |