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Liability for Future Policy Benefit, Activity (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Future Policy Benefits |  | $ 38,017.0 | $ 36,806.4 |  |
Unum US |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 2,442.7 | 2,431.4 | $ 2,071.1 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance beginning of year |  | 2,566.0 | 2,486.9 | 2,166.0 |
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change |  |  | (86.5) | (58.7) | $ 185.7
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (60.8) | (69.6) | (90.2)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 2,418.7 | 2,358.6 | 2,261.5
Liability for Future Policy Benefit, Expected Net Premium, Issuance |  | 555.1 | 485.0 | 486.5 |
Liability for Future Policy Benefit, Expected Net Premium, Interest Income |  | 94.6 | 91.0 | 77.2 |
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected |  | (388.6) | (368.6) | (338.3) |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance end of period |  | 2,679.8 | 2,566.0 | 2,486.9 |
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax |  | (57.8) | (123.3) | (55.5) |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period |  | 2,622.0 | 2,442.7 | 2,431.4 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 11,030.0 | 11,752.5 | 11,698.2 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of year |  | 11,565.8 | 11,949.5 | 12,177.3 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  | (232.7) | (197.2) | 77.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (145.3) | (309.1) | (377.2)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 11,187.8 | 11,443.2 | 11,877.9
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance | [1] | 2,042.3 | 1,991.0 | 2,007.7 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense |  | 402.9 | 415.8 | 442.1 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment |  | (2,267.1) | (2,284.2) | (2,378.2) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period |  | 11,365.9 | 11,565.8 | 11,949.5 |
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax |  | (298.6) | (535.8) | (197.0) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of period |  | 11,067.3 | 11,030.0 | 11,752.5 |
Liability for Future Policy Benefit, before Reinsurance, before Other |  | 8,445.3 | 8,587.3 | 9,321.1 |
Liability for Future Policy Benefit, Other |  | 32.2 | 30.4 | 31.6 |
Liability for Future Policy Benefit, before Reinsurance, after Other |  | 8,477.5 | 8,617.7 | 9,352.7 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 421.6 | 194.0 | 208.6 |
Liability for Future Policy Benefit, after Reinsurance |  | 8,055.9 | 8,423.7 | 9,144.1 |
Gross premiums or assessments |  | 6,799.0 | 6,547.1 | 6,263.2 |
interest accretion |  | 308.3 | 324.8 | 364.9 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  | 17,453.4 | 17,621.3 | 17,926.6 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance |  | 12,029.3 | 11,657.3 | 11,175.4 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance |  | $ 8,176.2 | $ 8,027.2 | $ 7,830.4 |
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate |  | 4.40% | 4.30% | 4.20% |
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate |  | 4.50% | 4.90% | 4.50% |
Liability for Future Policy Benefit, Weighted-Average Duration |  | 7 years | 7 years 1 month 6 days | 7 years |
Future Policy Benefits | [2] | $ 8,477.5 | $ 8,617.7 | $ 9,352.7 |
Unum International |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 276.1 | 270.3 | 197.1 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance beginning of year |  | 314.2 | 298.4 | 246.8 |
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change |  |  | (7.8) | (5.9) | (5.1)
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | 6.2 | 19.9 | 17.1
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 312.6 | 312.4 | 258.8
Liability for Future Policy Benefit, Expected Net Premium, Issuance |  | 37.6 | 34.4 | 23.5 |
Liability for Future Policy Benefit, Expected Net Premium, Interest Income |  | 13.4 | 11.4 | 9.4 |
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected |  | (33.3) | (28.5) | (23.0) |
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change |  | 47.7 | (15.5) | 29.7 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance end of period |  | 378.0 | 314.2 | 298.4 |
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax |  | (25.2) | (38.1) | (28.1) |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period |  | 352.8 | 276.1 | 270.3 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 2,391.6 | 2,527.4 | 2,231.4 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of year |  | 2,641.5 | 2,687.1 | 2,495.5 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  | (15.1) | 0.1 | 17.7
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (10.5) | (20.5) | 1.3
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 2,615.9 | 2,666.7 | 2,514.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance | [3] | 424.0 | 379.0 | 335.2 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense |  | 74.0 | 67.9 | 63.5 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment |  | (433.0) | (409.3) | (388.3) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change |  | 242.5 | (62.8) | 162.2 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period |  | 2,923.4 | 2,641.5 | 2,687.1 |
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax |  | (224.4) | (249.9) | (159.7) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of period |  | 2,699.0 | 2,391.6 | 2,527.4 |
Liability for Future Policy Benefit, before Reinsurance, before Other |  | 2,346.2 | 2,115.5 | 2,257.1 |
Liability for Future Policy Benefit, Other |  | 49.8 | 40.7 | 36.1 |
Liability for Future Policy Benefit, before Reinsurance, after Other |  | 2,396.0 | 2,156.2 | 2,293.2 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 70.4 | 67.9 | 78.7 |
Liability for Future Policy Benefit, after Reinsurance |  | 2,325.6 | 2,088.3 | 2,214.5 |
Gross premiums or assessments |  | 1,061.5 | 957.1 | 849.0 |
interest accretion |  | 60.6 | 56.5 | 54.1 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  | 4,723.8 | 4,258.2 | 4,261.1 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance |  | 1,652.7 | 1,295.7 | 1,196.6 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance |  | $ 1,030.3 | $ 823.4 | $ 778.6 |
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate |  | 4.10% | 4.10% | 4.00% |
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate |  | 4.90% | 5.10% | 4.60% |
Liability for Future Policy Benefit, Weighted-Average Duration |  | 8 years 9 months 18 days | 8 years 9 months 18 days | 8 years 7 months 6 days |
Future Policy Benefits |  | $ 2,396.0 | $ 2,156.2 | $ 2,293.2 |
Colonial Life |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 3,553.3 | 3,592.6 | 3,745.4 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance beginning of year |  | 3,793.8 | 3,754.3 | 4,046.4 |
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change |  |  | 0.7 | (7.9) | (322.7)
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (48.9) | (57.3) | (53.5)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 3,745.6 | 3,689.1 | 3,670.2
Liability for Future Policy Benefit, Expected Net Premium, Issuance |  | 564.5 | 555.9 | 544.9 |
Liability for Future Policy Benefit, Expected Net Premium, Interest Income |  | 138.4 | 132.8 | 122.7 |
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected |  | (597.6) | (584.0) | (583.5) |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance end of period |  | 3,850.9 | 3,793.8 | 3,754.3 |
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax |  | (141.9) | (240.5) | (161.7) |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period |  | 3,709.0 | 3,553.3 | 3,592.6 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 5,434.9 | 5,566.0 | 5,581.1 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of year |  | 6,026.2 | 5,925.2 | 6,163.9 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  | (7.6) | (52.7) | (402.9)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (71.9) | (92.2) | (52.0)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 5,946.7 | 5,780.3 | 5,709.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance |  | 617.9 | 610.8 | 605.9 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense |  | 233.8 | 224.4 | 211.3 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment |  | (619.0) | (589.3) | (601.0) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period |  | 6,179.4 | 6,026.2 | 5,925.2 |
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax |  | (469.0) | (591.3) | (359.2) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of period |  | 5,710.4 | 5,434.9 | 5,566.0 |
Liability for Future Policy Benefit, before Reinsurance, before Other |  | 2,001.4 | 1,881.6 | 1,973.4 |
Liability for Future Policy Benefit, Other |  | 30.6 | 22.6 | 24.4 |
Liability for Future Policy Benefit, before Reinsurance, after Other |  | 2,032.0 | 1,904.2 | 1,997.8 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 1.3 | 0.9 | 1.8 |
Liability for Future Policy Benefit, after Reinsurance |  | 2,030.7 | 1,903.3 | 1,996.0 |
Gross premiums or assessments |  | 1,778.3 | 1,718.9 | 1,658.6 |
interest accretion |  | 95.4 | 91.6 | 88.6 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  | 11,058.1 | 10,409.4 | 9,796.7 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance |  | 13,212.6 | 12,618.4 | 11,903.1 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance |  | $ 9,336.4 | $ 9,049.4 | $ 8,702.2 |
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate |  | 4.50% | 4.40% | 4.30% |
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate |  | 5.30% | 5.50% | 4.80% |
Liability for Future Policy Benefit, Weighted-Average Duration |  | 17 years 7 months 6 days | 17 years 3 months 18 days | 17 years |
Future Policy Benefits |  | $ 2,032.0 | $ 1,904.2 | $ 1,997.8 |
Closed Block |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 7,658.5 | 8,123.5 | 6,412.6 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance beginning of year |  | 7,592.9 | 7,703.6 | 6,236.1 |
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change |  |  | 255.3 | 145.5 | 1,641.3
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (119.6) | (41.2) | 44.1
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 7,728.6 | 7,807.9 | 7,921.5
Liability for Future Policy Benefit, Expected Net Premium, Interest Income |  | 392.0 | 401.8 | 374.7 |
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected |  | (636.3) | (616.8) | (592.6) |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance end of period |  | 7,484.3 | 7,592.9 | 7,703.6 |
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax |  | 248.4 | 65.6 | 419.9 |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period |  | 7,732.7 | 7,658.5 | 8,123.5 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 30,063.6 | 32,577.7 | 29,418.7 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of year |  | 30,544.7 | 30,743.9 | 28,852.3 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  | 971.3 | 1.3 | 2,009.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (20.1) | 85.7 | 117.1
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 31,495.9 | 30,830.9 | 30,978.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance | [4] | 80.4 | 101.2 | 123.4 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense |  | 1,551.1 | 1,545.0 | 1,510.3 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment |  | (1,957.6) | (1,932.4) | (1,868.6) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period |  | 31,169.8 | 30,544.7 | 30,743.9 |
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax |  | 36.6 | (481.1) | 1,833.8 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of period |  | 31,206.4 | 30,063.6 | 32,577.7 |
Liability for Future Policy Benefit, before Reinsurance, before Other |  | 23,473.7 | 22,405.1 | 24,454.2 |
Liability for Future Policy Benefit, Other | [5] | 1,449.5 | 1,498.0 | 1,661.2 |
Liability for Future Policy Benefit, before Reinsurance, after Other |  | 24,923.2 | 23,903.1 | 26,115.4 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 9,825.0 | 6,775.9 | 7,466.9 |
Liability for Future Policy Benefit, after Reinsurance |  | 15,098.2 | 17,127.2 | 18,648.5 |
Gross premiums or assessments |  | 865.7 | 884.4 | 919.9 |
interest accretion |  | 1,159.1 | 1,143.2 | 1,135.6 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  | 69,478.9 | 71,145.2 | 73,341.4 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance |  | 12,601.0 | 13,767.1 | 14,486.4 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance |  | $ 7,673.0 | $ 8,029.1 | $ 8,241.7 |
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate |  | 5.30% | 5.30% | 5.20% |
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate |  | 5.40% | 5.50% | 4.90% |
Liability for Future Policy Benefit, Weighted-Average Duration |  | 12 years 4 months 24 days | 12 years 10 months 24 days | 13 years 2 months 12 days |
Future Policy Benefits | [2] | $ 24,923.2 | $ 23,903.1 | $ 26,115.4 |
Other Products |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Future Policy Benefits | [2] | 188.3 | 225.2 | 250.3 |
Group Disability | Unum US |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance beginning of year |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change |  |  | 0.0 | 0.0 | 0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | 0.0 | 0.0 | 0.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 0.0 | 0.0 | 0.0
Liability for Future Policy Benefit, Expected Net Premium, Issuance |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Interest Income |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance end of period |  | 0.0 | 0.0 | 0.0 |
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 4,735.8 | 5,147.4 | 5,533.3 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of year |  | 4,907.5 | 5,277.1 | 5,793.1 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  | (93.0) | (76.4) | (100.2)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (43.6) | (168.9) | (204.0)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 4,770.9 | 5,031.8 | 5,488.9
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance | [1] | 1,081.9 | 1,093.2 | 1,094.5 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense |  | 136.7 | 151.3 | 171.2 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment |  | (1,332.6) | (1,368.8) | (1,477.5) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period |  | 4,656.9 | 4,907.5 | 5,277.1 |
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax |  | (68.8) | (171.7) | (129.7) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of period |  | 4,588.1 | 4,735.8 | 5,147.4 |
Liability for Future Policy Benefit, before Reinsurance, before Other |  | 4,588.1 | 4,735.8 | 5,147.4 |
Liability for Future Policy Benefit, Other |  | 0.2 | 0.4 | 0.2 |
Liability for Future Policy Benefit, before Reinsurance, after Other |  | 4,588.3 | 4,736.2 | 5,147.6 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 24.8 | 26.4 | 30.7 |
Liability for Future Policy Benefit, after Reinsurance |  | 4,563.5 | 4,709.8 | 5,116.9 |
Gross premiums or assessments |  | 3,149.9 | 3,070.4 | 2,958.7 |
interest accretion |  | 136.7 | 151.3 | 171.2 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  | 5,634.4 | 5,953.3 | 6,376.6 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance |  | $ 0.0 | $ 0.0 | $ 0.0 |
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate |  | 4.30% | 4.20% | 4.00% |
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate |  | 4.40% | 4.90% | 4.60% |
Liability for Future Policy Benefit, Weighted-Average Duration |  | 4 years | 4 years 2 months 12 days | 4 years 3 months 18 days |
Group Life and AD&D | Unum US |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year |  | $ 0.0 | $ 0.0 | $ 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance beginning of year |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change |  |  | 0.0 | 0.0 | 0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | 0.0 | 0.0 | 0.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 0.0 | 0.0 | 0.0
Liability for Future Policy Benefit, Expected Net Premium, Issuance |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Interest Income |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance end of period |  | 0.0 | 0.0 | 0.0 |
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 835.2 | 922.0 | 972.6 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of year |  | 852.6 | 936.5 | 998.5 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  | (7.1) | (17.0) | 0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (44.9) | (53.1) | (37.0)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 800.6 | 866.4 | 961.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance | [1] | 363.1 | 375.4 | 394.2 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense |  | 16.3 | 17.7 | 20.0 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment |  | (372.5) | (406.9) | (439.2) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period |  | 807.5 | 852.6 | 936.5 |
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax |  | (5.9) | (17.4) | (14.5) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of period |  | 801.6 | 835.2 | 922.0 |
Liability for Future Policy Benefit, before Reinsurance, before Other |  | 801.6 | 835.2 | 922.0 |
Liability for Future Policy Benefit, Other |  | 0.8 | 0.8 | 1.0 |
Liability for Future Policy Benefit, before Reinsurance, after Other |  | 802.4 | 836.0 | 923.0 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 6.0 | 5.3 | 7.2 |
Liability for Future Policy Benefit, after Reinsurance |  | 796.4 | 830.7 | 915.8 |
Gross premiums or assessments |  | 2,097.2 | 1,996.0 | 1,878.0 |
interest accretion |  | 16.3 | 17.7 | 20.0 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  | 910.7 | 964.5 | 1,063.2 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance |  | $ 0.0 | $ 0.0 | $ 0.0 |
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate |  | 2.40% | 2.30% | 2.20% |
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate |  | 2.50% | 2.70% | 2.60% |
Liability for Future Policy Benefit, Weighted-Average Duration |  | 2 years 3 months 18 days | 2 years 4 months 24 days | 2 years 7 months 6 days |
Voluntary Benefits | Unum US |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year |  | $ 1,240.2 | $ 1,134.7 | $ 868.2 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance beginning of year |  | 1,335.3 | 1,192.5 | 937.9 |
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change |  |  | (29.6) | 41.5 | 180.7
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (41.4) | (66.2) | (79.8)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 1,264.3 | 1,167.8 | 1,038.8
Liability for Future Policy Benefit, Expected Net Premium, Issuance |  | 351.6 | 316.3 | 288.6 |
Liability for Future Policy Benefit, Expected Net Premium, Interest Income |  | 45.7 | 39.4 | 29.0 |
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected |  | (214.3) | (188.2) | (163.9) |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance end of period |  | 1,447.3 | 1,335.3 | 1,192.5 |
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax |  | (61.8) | (95.1) | (57.8) |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period |  | 1,385.5 | 1,240.2 | 1,134.7 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 2,362.5 | 2,334.5 | 1,999.5 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of year |  | 2,614.6 | 2,422.0 | 2,141.2 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  | (40.8) | 51.6 | 170.1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (36.5) | (68.0) | (90.9)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 2,537.3 | 2,405.6 | 2,220.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance | [1] | 375.3 | 339.3 | 303.7 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense |  | 106.6 | 97.7 | 86.2 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment |  | (268.1) | (228.0) | (188.3) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period |  | 2,751.1 | 2,614.6 | 2,422.0 |
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax |  | (214.2) | (252.1) | (87.5) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of period |  | 2,536.9 | 2,362.5 | 2,334.5 |
Liability for Future Policy Benefit, before Reinsurance, before Other |  | 1,151.4 | 1,122.3 | 1,199.8 |
Liability for Future Policy Benefit, Other |  | 4.1 | 2.8 | 2.6 |
Liability for Future Policy Benefit, before Reinsurance, after Other |  | 1,155.5 | 1,125.1 | 1,202.4 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 12.9 | 13.0 | 14.0 |
Liability for Future Policy Benefit, after Reinsurance |  | 1,142.6 | 1,112.1 | 1,188.4 |
Gross premiums or assessments |  | 871.9 | 821.7 | 789.9 |
interest accretion |  | 60.9 | 58.3 | 57.2 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  | 5,838.3 | 5,590.6 | 5,173.1 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance |  | 6,205.6 | 5,799.1 | 5,450.6 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance |  | $ 3,975.5 | $ 3,815.4 | $ 3,717.5 |
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate |  | 5.00% | 5.00% | 5.00% |
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate |  | 5.50% | 5.50% | 4.90% |
Liability for Future Policy Benefit, Weighted-Average Duration |  | 18 years 1 month 6 days | 18 years 3 months 18 days | 18 years 1 month 6 days |
Individual Disability | Unum US |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year |  | $ 1,202.5 | $ 1,296.7 | $ 1,202.9 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance beginning of year |  | 1,230.7 | 1,294.4 | 1,228.1 |
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change |  |  | (56.9) | (100.2) | 5.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (19.4) | (3.4) | (10.4)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 1,154.4 | 1,190.8 | 1,222.7
Liability for Future Policy Benefit, Expected Net Premium, Issuance |  | 203.5 | 168.7 | 197.9 |
Liability for Future Policy Benefit, Expected Net Premium, Interest Income |  | 48.9 | 51.6 | 48.2 |
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected |  | (174.3) | (180.4) | (174.4) |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance end of period |  | 1,232.5 | 1,230.7 | 1,294.4 |
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax |  | 4.0 | (28.2) | 2.3 |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period |  | 1,236.5 | 1,202.5 | 1,296.7 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 3,096.5 | 3,348.6 | 3,192.8 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of year |  | 3,191.1 | 3,313.9 | 3,244.5 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  | (91.8) | (155.4) | 7.9
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (20.3) | (19.1) | (45.3)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 3,079.0 | 3,139.4 | 3,207.1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance | [1] | 222.0 | 183.1 | 215.3 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense |  | 143.3 | 149.1 | 164.7 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment |  | (293.9) | (280.5) | (273.2) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period |  | 3,150.4 | 3,191.1 | 3,313.9 |
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax |  | (9.7) | (94.6) | 34.7 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of period |  | 3,140.7 | 3,096.5 | 3,348.6 |
Liability for Future Policy Benefit, before Reinsurance, before Other |  | 1,904.2 | 1,894.0 | 2,051.9 |
Liability for Future Policy Benefit, Other |  | 27.1 | 26.4 | 27.8 |
Liability for Future Policy Benefit, before Reinsurance, after Other |  | 1,931.3 | 1,920.4 | 2,079.7 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 377.9 | 149.3 | 156.7 |
Liability for Future Policy Benefit, after Reinsurance |  | 1,553.4 | 1,771.1 | 1,923.0 |
Gross premiums or assessments |  | 680.0 | 659.0 | 636.6 |
interest accretion |  | 94.4 | 97.5 | 116.5 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  | 5,070.0 | 5,112.9 | 5,313.7 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance |  | 5,823.7 | 5,858.2 | 5,724.8 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance |  | $ 4,200.7 | $ 4,211.8 | $ 4,112.9 |
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate |  | 5.20% | 5.10% | 5.10% |
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate |  | 4.90% | 5.30% | 4.80% |
Liability for Future Policy Benefit, Weighted-Average Duration |  | 9 years 4 months 24 days | 9 years 4 months 24 days | 9 years 7 months 6 days |
Long-term Care | Closed Block |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year |  | $ 7,658.5 | $ 8,123.5 | $ 6,412.6 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance beginning of year |  | 7,592.9 | 7,703.6 | 6,236.1 |
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change |  |  | 255.3 | 145.5 | 1,641.3
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (119.6) | (41.2) | 44.1
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 7,728.6 | 7,807.9 | 7,921.5
Liability for Future Policy Benefit, Expected Net Premium, Interest Income |  | 392.0 | 401.8 | 374.7 |
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected |  | (636.3) | (616.8) | (592.6) |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance end of period |  | 7,484.3 | 7,592.9 | 7,703.6 |
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax |  | 248.4 | 65.6 | 419.9 |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period |  | 7,732.7 | 7,658.5 | 8,123.5 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 22,925.2 | 24,697.7 | 21,199.9 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of year |  | 22,953.7 | 22,649.3 | 20,221.6 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  | 974.6 | (4.1) | 2,009.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | 16.9 | 68.3 | 113.1
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 23,945.2 | 22,713.5 | 22,344.1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance | [4] | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense |  | 1,228.1 | 1,199.8 | 1,151.4 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment |  | (1,059.7) | (959.6) | (846.2) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period |  | 24,113.6 | 22,953.7 | 22,649.3 |
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax |  | 307.0 | (28.5) | 2,048.4 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of period |  | 24,420.6 | 22,925.2 | 24,697.7 |
Liability for Future Policy Benefit, before Reinsurance, before Other |  | 16,687.9 | 15,266.7 | 16,574.2 |
Liability for Future Policy Benefit, Other | [5] | 4.1 | 1.7 | 23.1 |
Liability for Future Policy Benefit, before Reinsurance, after Other |  | 16,692.0 | 15,268.4 | 16,597.3 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 3,369.4 | 4.2 | 4.5 |
Liability for Future Policy Benefit, after Reinsurance |  | 13,322.6 | 15,264.2 | 16,592.8 |
Gross premiums or assessments |  | 707.2 | 696.2 | 696.1 |
interest accretion |  | 836.1 | 798.0 | 776.7 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  | 59,239.1 | 60,051.5 | 61,447.7 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance |  | 12,601.0 | 13,767.1 | 14,486.4 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance |  | $ 7,673.0 | $ 8,029.1 | $ 8,241.7 |
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate |  | 5.60% | 5.60% | 5.60% |
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate |  | 5.50% | 5.60% | 5.00% |
Liability for Future Policy Benefit, Weighted-Average Duration |  | 14 years 8 months 12 days | 15 years 8 months 12 days | 16 years 4 months 24 days |
Other Insurance Product Line | Closed Block |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year |  | $ 0.0 | $ 0.0 | $ 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance beginning of year |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change |  |  | 0.0 | 0.0 | 0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | 0.0 | 0.0 | 0.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 0.0 | 0.0 | 0.0
Liability for Future Policy Benefit, Expected Net Premium, Interest Income |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance end of period |  | 0.0 | 0.0 | 0.0 |
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 7,138.4 | 7,880.0 | 8,218.8 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of year |  | 7,591.0 | 8,094.6 | 8,630.7 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  | (3.3) | 5.4 | 0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (37.0) | 17.4 | 4.0
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 7,550.7 | 8,117.4 | 8,634.7
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance | [4] | 80.4 | 101.2 | 123.4 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense |  | 323.0 | 345.2 | 358.9 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment |  | (897.9) | (972.8) | (1,022.4) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period |  | 7,056.2 | 7,591.0 | 8,094.6 |
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax |  | (270.4) | (452.6) | (214.6) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of period |  | 6,785.8 | 7,138.4 | 7,880.0 |
Liability for Future Policy Benefit, before Reinsurance, before Other |  | 6,785.8 | 7,138.4 | 7,880.0 |
Liability for Future Policy Benefit, Other | [5] | 1,445.4 | 1,496.3 | 1,638.1 |
Liability for Future Policy Benefit, before Reinsurance, after Other |  | 8,231.2 | 8,634.7 | 9,518.1 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 6,455.6 | 6,771.7 | 7,462.4 |
Liability for Future Policy Benefit, after Reinsurance |  | 1,775.6 | 1,863.0 | 2,055.7 |
Gross premiums or assessments |  | 158.5 | 188.2 | 223.8 |
interest accretion |  | 323.0 | 345.2 | 358.9 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  | 10,239.8 | 11,093.7 | 11,893.7 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance |  | 0.0 | 0.0 | 0.0 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance |  | $ 0.0 | $ 0.0 | $ 0.0 |
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate |  | 4.60% | 4.60% | 4.60% |
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate |  | 5.00% | 5.40% | 4.90% |
Liability for Future Policy Benefit, Weighted-Average Duration |  | 7 years 1 month 6 days | 7 years 2 months 12 days | 7 years 3 months 18 days |
Operating Segments |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year |  | $ 13,930.6 | $ 14,417.8 | $ 12,426.2 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance beginning of year |  | 14,266.9 | 14,243.2 | 12,695.3 |
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change |  |  | 161.7 | 73.0 | 1,499.2
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (223.1) | (148.2) | (82.5)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 14,205.5 | 14,168.0 | 14,112.0
Liability for Future Policy Benefit, Expected Net Premium, Issuance |  | 1,157.2 | 1,075.3 | 1,054.9 |
Liability for Future Policy Benefit, Expected Net Premium, Interest Income |  | 638.4 | 637.0 | 584.0 |
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected |  | (1,655.8) | (1,597.9) | (1,537.4) |
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change |  | 47.7 | (15.5) | 29.7 |
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance end of period |  | 14,393.0 | 14,266.9 | 14,243.2 |
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax |  | 23.5 | (336.3) | 174.6 |
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period |  | 14,416.5 | 13,930.6 | 14,417.8 |
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance beginning of year |  | 48,920.1 | 52,423.6 | 48,929.4 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of year |  | 50,778.2 | 51,305.7 | 49,689.0 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  | 715.9 | (248.5) | 1,702.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience |  |  | (247.8) | (336.1) | (310.8)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change |  |  | 51,246.3 | 50,721.1 | $ 51,080.2
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance | [6] | 3,164.6 | 3,082.0 | 3,072.2 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense |  | 2,261.8 | 2,253.1 | 2,227.2 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment |  | (5,276.7) | (5,215.2) | (5,236.1) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change |  | 242.5 | (62.8) | 162.2 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period |  | 51,638.5 | 50,778.2 | 51,305.7 |
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax |  | (955.4) | (1,858.1) | 1,117.9 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of period |  | 50,683.1 | 48,920.1 | 52,423.6 |
Liability for Future Policy Benefit, before Reinsurance, before Other |  | 36,266.6 | 34,989.5 | 38,005.8 |
Liability for Future Policy Benefit, Other | [7] | 1,562.1 | 1,591.7 | 1,753.3 |
Liability for Future Policy Benefit, before Reinsurance, after Other |  | 37,828.7 | 36,581.2 | 39,759.1 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 10,318.3 | 7,038.7 | 7,756.1 |
Liability for Future Policy Benefit, after Reinsurance |  | 27,510.4 | 29,542.5 | 32,003.0 |
Gross premiums or assessments |  | 10,504.5 | 10,107.5 | 9,690.7 |
interest accretion |  | 1,623.4 | 1,616.1 | 1,643.2 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  | 102,714.2 | 103,434.1 | 105,325.8 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance |  | 39,495.6 | 39,338.5 | 38,761.5 |
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance |  | $ 26,215.9 | $ 25,929.1 | $ 25,552.9 |
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate |  | 5.00% | 4.90% | 4.80% |
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate |  | 5.10% | 5.30% | 4.80% |
Liability for Future Policy Benefit, Weighted-Average Duration |  | 11 years 2 months 12 days | 11 years 4 months 24 days | 11 years 6 months |
Future Policy Benefits |  | $ 38,017.0 | $ 36,806.4 | $ 40,009.4 |
[1] | 1 Issuances include new policy issuances for most product lines. Issuances for Unum US group disability and Unum US group life and AD&D represents new claim incurrals.
[2] | 1 Unum US excludes the dental and vision product line and medical stop-loss products, Unum International excludes certain products in our supplemental product line and Closed Block excludes our participating fund account, which represents policies issued by one of our subsidiaries prior to its 1986 conversion from a mutual stock life insurance company. The liabilities associated with these products are included within Other products.
[3] | 1 Issuances for Unum International primarily represent new claim incurrals.
[4] | 1 Issuances for Closed Block - All Other represents new claim incurrals.
[5] | 2 Other for Closed Block - All Other primarily includes our closed block group pension products and certain of our ceded closed block individual life products.
[6] | 1 Issuances include new policy issuances for most product lines. For our Unum US group disability, Unum US group life and AD&D and Closed Block - All Other product lines and certain of our Unum International product lines, this line represents new claim incurrals.
[7] | 2 Other primarily relates to our Closed Block - All Other product line.

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