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v3.25.4

Premium Income by Major Line of Business within Each Segment (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Segment Reporting Information |  |  |
Premium Income | $ 10,831.0 | $ 10,497.4 | $ 10,046.0
Accident, Sickness, and Disability |  |  |
Segment Reporting Information |  |  |
Premium Income | 7,756.4 | 7,640.2 | 7,398.5
Life |  |  |
Segment Reporting Information |  |  |
Premium Income | 3,074.6 | 2,857.2 | 2,647.5
Operating Segments |  |  |
Segment Reporting Information |  |  |
Premium Income | 10,831.0 | 10,497.4 | 10,046.0
Operating Segments | Unum US |  |  |
Segment Reporting Information |  |  |
Premium Income | 7,083.5 | 6,883.2 | 6,579.2
Operating Segments | Unum US | Group Long-term Disability |  |  |
Segment Reporting Information |  |  |
Premium Income | 2,011.1 | 2,086.1 | 2,057.2
Operating Segments | Unum US | Group Short-term Disability |  |  |
Segment Reporting Information |  |  |
Premium Income | 1,138.4 | 1,084.0 | 1,012.3
Operating Segments | Unum US | Group Life |  |  |
Segment Reporting Information |  |  |
Premium Income | 1,871.1 | 1,784.7 | 1,679.0
Operating Segments | Unum US | Accidental Death & Dismemberment |  |  |
Segment Reporting Information |  |  |
Premium Income | 195.6 | 186.1 | 175.5
Operating Segments | Unum US | Voluntary Benefits |  |  |
Segment Reporting Information |  |  |
Premium Income | 927.4 | 879.2 | 850.1
Operating Segments | Unum US | Individual Disability |  |  |
Segment Reporting Information |  |  |
Premium Income | 615.1 | 566.0 | 527.0
Operating Segments | Unum US | Dental and Vision |  |  |
Segment Reporting Information |  |  |
Premium Income | 324.8 | 297.1 | 278.1
Operating Segments | Unum International |  |  |
Segment Reporting Information |  |  |
Premium Income | 1,082.8 | 949.5 | 825.2
Operating Segments | Unum International | Group Long-term Disability |  |  |
Segment Reporting Information |  |  |
Premium Income | 427.5 | 418.0 | 396.1
Operating Segments | Unum International | Group Life |  |  |
Segment Reporting Information |  |  |
Premium Income | 275.7 | 211.3 | 169.3
Operating Segments | Unum International | Supplemental |  |  |
Segment Reporting Information |  |  |
Premium Income | 184.2 | 165.6 | 141.5
Operating Segments | Unum International | Unum Poland |  |  |
Segment Reporting Information |  |  |
Premium Income | 195.4 | 154.6 | 118.3
Operating Segments | Colonial Life |  |  |
Segment Reporting Information |  |  |
Premium Income | 1,839.1 | 1,783.9 | 1,726.1
Operating Segments | Colonial Life | Accident, Sickness, and Disability |  |  |
Segment Reporting Information |  |  |
Premium Income | 993.5 | 969.5 | 946.1
Operating Segments | Colonial Life | Life |  |  |
Segment Reporting Information |  |  |
Premium Income | 483.6 | 458.0 | 426.5
Operating Segments | Colonial Life | Cancer and Critical Illness Colonial |  |  |
Segment Reporting Information |  |  |
Premium Income | 362.0 | 356.4 | 353.5
Operating Segments | Closed Block |  |  |
Segment Reporting Information |  |  |
Premium Income | 825.6 | 880.8 | 915.5
Operating Segments | Closed Block | Long-term Care |  |  |
Segment Reporting Information |  |  |
Premium Income | 670.8 | 696.1 | 696.0
Operating Segments | Closed Block | Other Insurance Product Line |  |  |
Segment Reporting Information |  |  |
Premium Income | $ 154.8 | $ 184.7 | $ 219.5

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