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v3.23.1

Accounting Developments (Details) $ / shares in Units, $ in Millions | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2023 USD ($) $ / shares | Mar. 31, 2022 USD ($) $ / shares | Mar. 31, 2022 USD ($) $ / shares | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Jan. 01, 2021 USD ($) | Dec. 31, 2020 USD ($)
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  | $ (3,162.3) | $ (4,438.5) |  | $ (4,438.5) |  | $ (3,448.3) |  | $ (5,164.6) | $ 4,166.0 |  |  |
Other Comprehensive Income (Loss), Net of Tax |  | 286.0 | 726.1 |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefits |  | 39,351.5 | 46,474.7 | [1] | 46,474.7 | [1] | 38,577.1 | [2] |  |  |  |  |
Policyholders' Account Balances |  | 5,709.6 | 5,772.3 | [1] | 5,772.3 | [1] | 5,740.2 | [2] |  |  |  |  |
Unearned Premiums |  | 451.6 | 444.8 |  | 444.8 |  | 365.5 |  |  |  |  |  |
Deferred Income Tax |  | 23.8 | 104.5 |  | 104.5 |  | 25.2 |  |  |  |  |  |
Liabilities |  | 53,176.4 | 60,878.0 |  | 60,878.0 |  | 52,413.5 |  |  |  |  |  |
Accumulated Other Comprehensive Loss |  | (3,162.3) | (4,438.5) |  | (4,438.5) |  | (3,448.3) |  | (5,164.6) |  |  |  |
Retained Earnings |  | 13,430.4 | 12,166.9 |  | 12,166.9 |  | 13,141.3 |  | 11,989.4 |  |  |  |
Stockholders' Equity Attributable to Parent |  | 9,247.4 | 6,887.8 |  | 6,887.8 |  | 8,735.0 |  |  |  |  |  |
Deferred Acquisition Costs |  | 2,602.4 | 2,464.3 |  | 2,464.3 |  | 2,560.0 |  |  |  |  | $ 2,272.6 |
Deferred Income Tax Assets, Net |  | 489.8 | 889.8 |  | 889.8 |  | 586.0 |  |  |  |  |  |
Other Assets |  | 1,677.2 | 1,704.9 | [3] | 1,704.9 | [3] | 1,666.6 |  |  |  |  |  |
Total Assets |  | 62,423.8 | 67,765.8 |  | 67,765.8 |  | 61,148.5 |  |  |  |  |  |
Policy and Contract Benefits |  |  | 0.0 | [1] | 0.0 | [1] | 0.0 | [2] |  |  |  |  |
Reserves for Future Policy and Contract Benefits |  |  | 0.0 | [1] | 0.0 | [1] | 0.0 | [2] |  |  |  |  |
Reinsurance Recoverable (net of allowance for credit losses of $3.9; $1.7) |  | 9,628.7 | 10,939.5 |  | $ 10,939.5 |  | 9,608.0 |  |  |  |  |  |
Amortization of Deferred Acquisition Costs |  | 115.9 | 103.6 |  |  |  |  |  |  |  |  |  |
Other Expenses |  | 273.2 | 240.5 |  |  |  |  |  |  |  |  |  |
Deferred |  | 27.4 | (28.0) |  |  |  |  |  |  |  |  |  |
Net Income |  | 358.3 | 240.4 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Receivables |  | 89.9 | 246.2 |  |  |  |  |  |  |  |  |  |
Change in Deferred Acquisition Costs |  | (41.8) | (38.2) |  |  |  |  |  |  |  |  |  |
Change in Insurance Reserves and Liabilities |  | (119.6) | 27.5 |  |  |  |  |  |  |  |  |  |
Change in Income Taxes |  | 76.2 | 54.4 |  |  |  |  |  |  |  |  |  |
Amortization of the Cost of Reinsurance |  | 11.0 | 13.4 |  |  |  |  |  |  |  |  |  |
Change in the Effect of Discount Rate Assumptions on the Liability for Future Policy Benefits, Net of Reinsurance (net of tax expense (benefit) of $(152.9); $982.8) | [4] |  | 0.0 |  |  |  |  |  |  |  |  |  |
Change in the Effect of Discount Rate Assumptions on the Liability for Future Policy Benefits, Net of Reinsurance (net of tax expense (benefit) of $(152.9); $982.8) |  | (573.9) | 3,658.1 | [4] |  |  |  |  |  |  |  |  |
Change in Foreign Currency Translation Adjustment (net of tax expense (benefit) of $(0.2); $0.9) |  | 24.7 | (32.0) |  |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss) |  | $ 644.3 | $ 966.5 |  |  |  |  |  |  |  |  |  |
Basic Earnings Per Share | (per share) |  | $ 1.81 | $ 1.19 |  | $ 1.19 |  |  |  |  |  |  |  |
Diluted Earnings Per Share | (per share) |  | $ 1.80 | $ 1.18 |  | $ 1.18 |  |  |  |  |  |  |  |
Premium Income |  | $ 2,459.3 | $ 2,401.4 |  |  |  |  |  |  |  |  |  |
Benefits and Change in Reserves for Future Benefits |  | 1,882.1 | 1,983.0 |  |  |  |  |  |  |  |  |  |
Policy Benefits - Remeasurement Gain |  | (145.7) | (68.8) |  |  |  |  |  |  |  |  |  |
Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefits |  | 39,351.5 | 46,474.7 |  | $ 46,474.7 |  |  |  |  |  |  |  |
Policyholders' Account Balances |  | 5,709.6 | 5,772.3 |  | 5,772.3 |  | 5,598.6 |  | 5,679.6 |  |  |  |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 8,148.2 | 9,424.6 |  | 9,424.6 |  |  |  |  | 10,496.0 | [5] |  |
Liability for Future Policy Benefit, after Reinsurance |  | 30,975.9 | 36,826.5 |  | 36,826.5 |  |  |  |  | 45,089.4 |  |  |
Deferred Acquisition Costs |  | 2,602.4 | 2,464.3 |  | 2,464.3 |  | 2,560.0 |  | 2,427.4 |  |  |  |
Amortization of Deferred Acquisition Costs |  | 115.9 | 103.6 |  |  |  |  |  |  |  |  |  |
Premium Income |  | 2,459.3 | 2,401.4 |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  | 39,124.1 | 46,251.1 |  | 46,251.1 |  |  |  |  |  |  | 45,704.4 | [6]
Previously Reported [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  | 10,871.0 |
Other Comprehensive Income (Loss), Net of Tax |  |  | (934.2) |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefits |  |  | 0.0 | [1] | 0.0 | [1] | 0.0 | [2] |  |  |  |  |
Policyholders' Account Balances |  |  | 0.0 | [1] | 0.0 | [1] | 0.0 | [2] |  |  |  |  |
Unearned Premiums |  |  | 431.9 |  | 431.9 |  | 352.7 |  |  |  |  |  |
Deferred Income Tax |  |  | 202.8 |  | 202.8 |  | 9.2 |  |  |  |  |  |
Liabilities |  |  | 55,848.6 |  | 55,848.6 |  | 52,237.4 |  |  |  |  |  |
Accumulated Other Comprehensive Loss |  |  | (580.1) |  | (580.1) |  | (2,756.6) |  | 354.1 |  |  |  |
Retained Earnings |  |  | 12,043.8 |  | 12,043.8 |  | 12,912.1 |  | 11,853.2 |  |  |  |
Stockholders' Equity Attributable to Parent |  |  | 10,623.1 |  | 10,623.1 |  | 9,197.5 |  |  |  |  |  |
Deferred Acquisition Costs |  |  | 2,229.2 |  | 2,229.2 |  | 2,252.3 |  |  |  |  |  |
Deferred Income Tax Assets, Net |  |  | 0.0 |  | 0.0 |  | 449.8 |  |  |  |  |  |
Other Assets |  |  | 1,834.9 | [3] | 1,834.9 | [3] | 1,786.3 |  |  |  |  |  |
Total Assets |  |  | 66,471.7 |  | 66,471.7 |  | 61,434.9 |  |  |  |  |  |
Policy and Contract Benefits |  |  | 1,874.2 | [1] | 1,874.2 | [1] | 1,839.8 | [2] |  |  |  |  |
Reserves for Future Policy and Contract Benefits |  |  | 45,258.0 | [1] | 45,258.0 | [1] | 42,330.2 | [2] |  |  |  |  |
Reinsurance Recoverable (net of allowance for credit losses of $3.9; $1.7) |  |  | 10,640.3 |  | $ 10,640.3 |  | 10,218.6 |  |  |  |  |  |
Amortization of Deferred Acquisition Costs |  |  | 156.1 |  |  |  |  |  |  |  |  |  |
Other Expenses |  |  | 243.8 |  |  |  |  |  |  |  |  |  |
Deferred |  |  | (24.7) |  |  |  |  |  |  |  |  |  |
Net Income |  |  | 253.5 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Receivables |  |  | 239.2 |  |  |  |  |  |  |  |  |  |
Change in Deferred Acquisition Costs |  |  | 14.3 |  |  |  |  |  |  |  |  |  |
Change in Insurance Reserves and Liabilities |  |  | (38.3) |  |  |  |  |  |  |  |  |  |
Change in Income Taxes |  |  | 58.3 |  |  |  |  |  |  |  |  |  |
Amortization of the Cost of Reinsurance |  |  | 16.7 |  |  |  |  |  |  |  |  |  |
Change in the Effect of Discount Rate Assumptions on the Liability for Future Policy Benefits, Net of Reinsurance (net of tax expense (benefit) of $(152.9); $982.8) | [4] |  | 1,997.7 |  |  |  |  |  |  |  |  |  |
Change in the Effect of Discount Rate Assumptions on the Liability for Future Policy Benefits, Net of Reinsurance (net of tax expense (benefit) of $(152.9); $982.8) | [4] |  | 0.0 |  |  |  |  |  |  |  |  |  |
Change in Foreign Currency Translation Adjustment (net of tax expense (benefit) of $(0.2); $0.9) |  |  | (31.9) |  |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss) |  |  | (680.7) |  |  |  |  |  |  |  |  |  |
Basic Earnings Per Share | $ / shares |  |  |  |  | $ 1.25 |  |  |  |  |  |  |  |
Diluted Earnings Per Share | $ / shares |  |  |  |  | $ 1.25 |  |  |  |  |  |  |  |
Premium Income |  |  | 2,403.3 |  |  |  |  |  |  |  |  |  |
Benefits and Change in Reserves for Future Benefits |  |  | 1,843.9 |  |  |  |  |  |  |  |  |  |
Policy Benefits - Remeasurement Gain |  |  | 0.0 |  |  |  |  |  |  |  |  |  |
Revision of Prior Period, Accounting Standards Update, Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  | (6,705.0) |  |  |
Accounting Standards Update 2018-12 | Revision of Prior Period, Accounting Standards Update, Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax |  |  | 1,660.3 |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefits |  |  | 46,474.7 | [1] | $ 46,474.7 | [1] | 38,577.1 | [2] |  |  |  |  |
Policyholders' Account Balances |  |  | 5,772.3 | [1] | 5,772.3 | [1] | 5,740.2 | [2] |  |  |  |  |
Unearned Premiums |  |  | 12.9 |  | 12.9 |  | 12.8 |  |  |  |  |  |
Deferred Income Tax |  |  | (98.3) |  | (98.3) |  | 16.0 |  |  |  |  |  |
Liabilities |  |  | 5,029.4 |  | 5,029.4 |  | 176.1 |  |  |  |  |  |
Accumulated Other Comprehensive Loss |  |  | (3,858.4) |  | (3,858.4) |  | (691.7) |  | (5,518.7) |  |  |  |
Retained Earnings |  |  | 123.1 |  | 123.1 |  | 229.2 |  | 136.2 |  |  |  |
Stockholders' Equity Attributable to Parent |  |  | (3,735.3) |  | (3,735.3) |  | (462.5) |  |  |  |  |  |
Deferred Acquisition Costs |  |  | 235.1 |  | 235.1 |  | 307.7 |  |  |  |  |  |
Deferred Income Tax Assets, Net |  |  | 889.8 |  | 889.8 |  | 136.2 |  |  |  |  |  |
Other Assets |  |  | (130.0) | [3] | (130.0) | [3] | (119.7) |  |  |  |  |  |
Total Assets |  |  | 1,294.1 |  | 1,294.1 |  | (286.4) |  |  |  |  |  |
Policy and Contract Benefits |  |  | (1,874.2) | [1] | (1,874.2) | [1] | (1,839.8) | [2] |  |  |  |  |
Reserves for Future Policy and Contract Benefits |  |  | (45,258.0) | [1] | (45,258.0) | [1] | (42,330.2) | [2] |  |  |  |  |
Reinsurance Recoverable (net of allowance for credit losses of $3.9; $1.7) |  |  | 299.2 |  | $ 299.2 |  | (610.6) |  |  |  |  |  |
Amortization of Deferred Acquisition Costs |  |  | (52.5) |  |  |  |  |  |  |  |  |  |
Other Expenses |  |  | (3.3) |  |  |  |  |  |  |  |  |  |
Deferred |  |  | (3.3) |  |  |  |  |  |  |  |  |  |
Net Income |  |  | (13.1) |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Receivables |  |  | 7.0 |  |  |  |  |  |  |  |  |  |
Change in Deferred Acquisition Costs |  |  | (52.5) |  |  |  |  |  |  |  |  |  |
Change in Insurance Reserves and Liabilities |  |  | 65.8 |  |  |  |  |  |  |  |  |  |
Change in Income Taxes |  |  | (3.9) |  |  |  |  |  |  |  |  |  |
Amortization of the Cost of Reinsurance |  |  | (3.3) |  |  |  |  |  |  |  |  |  |
Change in the Effect of Discount Rate Assumptions on the Liability for Future Policy Benefits, Net of Reinsurance (net of tax expense (benefit) of $(152.9); $982.8) | [4] |  | (1,997.7) |  |  |  |  |  |  |  |  |  |
Change in the Effect of Discount Rate Assumptions on the Liability for Future Policy Benefits, Net of Reinsurance (net of tax expense (benefit) of $(152.9); $982.8) | [4] |  | 3,658.1 |  |  |  |  |  |  |  |  |  |
Change in Foreign Currency Translation Adjustment (net of tax expense (benefit) of $(0.2); $0.9) |  |  | (0.1) |  |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss) |  |  | 1,647.2 |  |  |  |  |  |  |  |  |  |
Basic Earnings Per Share | $ / shares |  |  |  |  | $ (0.06) |  |  |  |  |  |  |  |
Diluted Earnings Per Share | $ / shares |  |  |  |  | $ (0.07) |  |  |  |  |  |  |  |
Premium Income |  |  | (1.9) |  |  |  |  |  |  |  |  |  |
Benefits and Change in Reserves for Future Benefits |  |  | 139.1 |  |  |  |  |  |  |  |  |  |
Policy Benefits - Remeasurement Gain |  |  | (68.8) |  |  |  |  |  |  |  |  |  |
Unum US |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefits | [7] | 9,671.3 | 11,093.3 |  | $ 11,093.3 |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 255.8 | 308.2 |  | 308.2 |  |  |  |  | 357.7 | [5] |  |
Liability for Future Policy Benefit, after Reinsurance |  | 9,415.5 | 10,785.1 |  | 10,785.1 |  |  |  |  | 12,503.7 |  |  |
Deferred Acquisition Costs |  | 1,198.3 | 1,164.3 |  | 1,164.3 |  | 1,185.1 |  | 1,152.9 |  |  | 1,168.7 |
Amortization of Deferred Acquisition Costs |  | 65.8 | 56.9 |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  | 9,671.3 | 11,093.3 |  | 11,093.3 |  |  |  |  |  |  | 12,184.6 | [6]
Unum US | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets |  | 16,085.8 |  |  |  |  | 16,356.3 |  |  |  |  |  |
Premium Income |  | 1,609.6 | 1,543.0 |  |  |  |  |  |  |  |  |  |
Unum US | Group Disability |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 42.5 | 58.0 |  | 58.0 |  |  |  |  | 58.3 |  |  |
Liability for Future Policy Benefit, after Reinsurance |  | 5,456.8 | 6,256.5 |  | 6,256.5 |  |  |  |  | 7,237.4 |  |  |
Deferred Acquisition Costs |  | 62.5 | 62.5 |  | 62.5 |  | 61.0 |  | 60.9 |  |  |  |
Amortization of Deferred Acquisition Costs |  | 13.1 | 11.1 |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  | 5,499.3 | 6,314.5 |  | 6,314.5 |  |  |  |  |  |  | 7,409.0 |
Unum US | Group Life and AD&D |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 5.6 | 4.7 |  | 4.7 |  |  |  |  | 3.0 |  |  |
Liability for Future Policy Benefit, after Reinsurance |  | 928.9 | 1,026.8 |  | 1,026.8 |  |  |  |  | 1,124.3 |  |  |
Deferred Acquisition Costs |  | 49.3 | 53.6 |  | 53.6 |  | 49.3 |  | 53.9 |  |  |  |
Amortization of Deferred Acquisition Costs |  | 9.8 | 9.4 |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  | 934.5 | 1,031.5 |  | 1,031.5 |  |  |  |  |  |  | 1,123.9 |
Unum US | Individual Disability |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 195.2 | 216.8 |  | 216.8 |  |  |  |  | 260.6 |  |  |
Liability for Future Policy Benefit, after Reinsurance |  | 1,864.9 | 2,124.7 |  | 2,124.7 |  |  |  |  | 2,507.1 |  |  |
Deferred Acquisition Costs |  | 472.4 | 447.0 |  | 447.0 |  | 464.4 |  | 441.8 |  |  |  |
Amortization of Deferred Acquisition Costs |  | 13.3 | 12.3 |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  | 2,060.1 | 2,341.5 |  | 2,341.5 |  |  |  |  |  |  | 2,485.3 |
Unum US | Voluntary Benefits |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Policyholders' Account Balances |  | 677.2 | 680.6 |  | 680.6 |  | 586.8 |  | 598.7 |  |  |  |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 12.5 | 28.7 |  | 28.7 |  |  |  |  | 35.7 |  |  |
Liability for Future Policy Benefit, after Reinsurance |  | 1,164.9 | 1,377.1 |  | 1,377.1 |  |  |  |  | 1,623.5 |  |  |
Deferred Acquisition Costs |  | 604.2 | 593.3 |  | 593.3 |  | 601.0 |  | 588.6 |  |  |  |
Amortization of Deferred Acquisition Costs |  | 27.1 | 21.9 |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  | 1,177.4 | 1,405.8 |  | 1,405.8 |  |  |  |  |  |  | 1,154.9 |
Unum US | Voluntary Benefits | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Premium Income |  | 214.5 | 218.6 |  |  |  |  |  |  |  |  |  |
Unum US | Dental and Vision |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  |  |  |  |  |  |  |  |  | 0.1 |  |  |
Liability for Future Policy Benefit, after Reinsurance |  |  |  |  |  |  |  |  |  | 11.4 |  |  |
Deferred Acquisition Costs |  | 9.9 | 7.9 |  | 7.9 |  | 9.4 |  | 7.7 |  |  |  |
Amortization of Deferred Acquisition Costs |  | 2.5 | 2.2 |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  |  |  |  |  |  |  |  |  |  |  | 11.5 |
Unum US | Dental and Vision | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Premium Income |  | 69.3 | 70.6 |  |  |  |  |  |  |  |  |  |
Colonial Life |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefits |  | 1,942.1 | 2,236.7 |  | 2,236.7 |  |  |  |  |  |  |  |
Policyholders' Account Balances |  | 867.5 | 869.5 |  | 869.5 |  | 852.4 |  | 849.2 |  |  |  |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 0.8 | 1.9 |  | 1.9 |  |  |  |  | 4.4 | [5] |  |
Liability for Future Policy Benefit, after Reinsurance |  | 1,941.3 | 2,234.8 |  | 2,234.8 |  |  |  |  | 2,524.2 |  |  |
Deferred Acquisition Costs |  | 1,364.8 | 1,263.5 |  | 1,263.5 |  | 1,337.9 |  | 1,238.1 |  |  | 1,071.9 |
Amortization of Deferred Acquisition Costs |  | 48.3 | 44.6 |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  | 1,942.1 | 2,236.7 |  | 2,236.7 |  |  |  |  |  |  | 1,977.2 | [6]
Colonial Life | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets |  | 4,678.8 |  |  |  |  | 4,575.0 |  |  |  |  |  |
Premium Income |  | 429.5 | 430.7 |  |  |  |  |  |  |  |  |  |
Unum International |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefits |  | 2,148.6 | 2,592.1 |  | 2,592.1 |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 74.7 | 101.0 |  | 101.0 |  |  |  |  | 132.5 | [5] |  |
Liability for Future Policy Benefit, after Reinsurance |  | 2,073.9 | 2,491.1 |  | 2,491.1 |  |  |  |  | 3,070.9 |  |  |
Deferred Acquisition Costs |  | 39.3 | 36.5 |  | 36.5 |  | 37.0 |  | 36.4 |  |  | 32.0 |
Amortization of Deferred Acquisition Costs |  | 1.8 | 2.1 |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  | 2,148.6 | 2,592.1 |  | 2,592.1 |  |  |  |  |  |  | 2,969.8 | [6]
Unum International | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets |  | 3,237.7 |  |  |  |  | 3,129.4 |  |  |  |  |  |
Premium Income |  | 188.6 | 187.8 |  |  |  |  |  |  |  |  |  |
Closed Block |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefits |  | 25,362.1 | 30,329.0 |  | 30,329.0 |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 7,816.8 | 9,013.4 |  | 9,013.4 |  |  |  |  | 10,001.4 | [5] |  |
Liability for Future Policy Benefit, after Reinsurance |  | 17,545.3 | 21,315.6 |  | 21,315.6 |  |  |  |  | 26,990.6 |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  | 25,362.1 | 30,329.0 |  | 30,329.0 |  |  |  |  |  |  | 28,572.8 | [6]
Closed Block | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets |  | 34,472.5 |  |  |  |  | 33,776.6 |  |  |  |  |  |
Premium Income |  | 231.6 | 239.9 |  |  |  |  |  |  |  |  |  |
Closed Block | Long-term Care |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 5.6 | 6.7 |  | 6.7 |  |  |  |  | 44.4 |  |  |
Liability for Future Policy Benefit, after Reinsurance |  | 15,393.1 | 18,826.9 |  | 18,826.9 |  |  |  |  | 22,696.5 |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  | 15,398.7 | 18,833.6 |  | 18,833.6 |  |  |  |  |  |  | 16,283.4 |
Closed Block | Long-term Care | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Premium Income |  | 175.1 | 174.8 |  |  |  |  |  |  |  |  |  |
Closed Block | Other Insurance Product Line |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Policyholders' Account Balances |  | 4,164.9 | 4,222.2 |  | 4,222.2 |  | 4,159.4 |  | 4,231.7 |  |  |  |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  | 7,811.2 | 9,006.7 |  | 9,006.7 |  |  |  |  | 9,957.0 |  |  |
Liability for Future Policy Benefit, after Reinsurance |  | 2,152.2 | 2,488.7 |  | 2,488.7 |  |  |  |  | 4,294.1 |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  | 9,963.4 | 11,495.4 |  | 11,495.4 |  |  |  |  |  |  | 12,289.4 |
Closed Block | Other Insurance Product Line | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Premium Income |  | 56.5 | 65.1 |  |  |  |  |  |  |  |  |  |
Retained Earnings |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  | 11,249.0 |  |  |
Stockholders' Equity Attributable to Parent |  | 13,430.4 | 12,166.9 |  | 12,166.9 |  |  |  |  |  |  |  |
Net Income |  | 358.3 | 240.4 |  |  |  |  |  |  |  |  |  |
Retained Earnings | Previously Reported [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  | 11,269.6 |
Stockholders' Equity Attributable to Parent |  |  |  |  |  |  | 13,141.3 |  | 11,853.2 |  |  |  |
Retained Earnings | Revision of Prior Period, Accounting Standards Update, Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  | (20.6) |  |  |
Retained Earnings | Accounting Standards Update 2018-12 | Revision of Prior Period, Accounting Standards Update, Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent |  |  |  |  |  |  | 0.0 |  | 136.2 |  |  |  |
Additional Paid-in Capital |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  | (6,310.2) |  |  |
Stockholders' Equity Attributable to Parent |  | 2,431.8 | 2,395.8 |  | 2,395.8 |  | 2,441.0 |  | 2,408.1 |  |  |  |
Additional Paid-in Capital | Previously Reported [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  | $ 374.2 |
Additional Paid-in Capital | Revision of Prior Period, Accounting Standards Update, Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  | (6,684.4) |  |  |
Accumulated Other Comprehensive Loss |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax |  | 286.0 | 726.1 |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent |  | $ (3,162.3) | $ (4,438.5) |  | $ (4,438.5) |  | (3,448.3) |  | (5,164.6) |  |  |  |
Accumulated Other Comprehensive Loss | Previously Reported [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent |  |  |  |  |  |  | (3,448.3) |  | 354.1 |  |  |  |
Accumulated Other Comprehensive Loss | Accounting Standards Update 2018-12 | Revision of Prior Period, Accounting Standards Update, Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent |  |  |  |  |  |  | 0.0 |  | (5,518.7) |  |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2018-12 |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Removal of Shadow Adjustments, DAC |  |  |  |  |  |  |  |  |  | 85.1 |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2018-12 | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Removal of Shadow Adjustments, LFPB | [8] |  |  |  |  |  |  |  |  | (6,225.6) |  |  |
Adjustments for Loss Contracts | [9] |  |  |  |  |  |  |  |  | 34.9 |  |  |
Effect of Change in Discount Rate Assumptions |  |  |  |  |  |  |  |  |  | 16,084.6 |  |  |
Other increase (decrease) | [10] |  |  |  |  |  |  |  |  | (12.9) |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Unum US | Accounting Standards Update 2018-12 |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Removal of Shadow Adjustments, LFPB | [8] |  |  |  |  |  |  |  |  | (1,569.7) |  |  |
Adjustments for Loss Contracts | [9] |  |  |  |  |  |  |  |  | 0.0 |  |  |
Effect of Change in Discount Rate Assumptions |  |  |  |  |  |  |  |  |  | 2,251.8 |  |  |
Other increase (decrease) | [10] |  |  |  |  |  |  |  |  | (5.3) |  |  |
Removal of Shadow Adjustments, DAC | [11] |  |  |  |  |  |  |  |  | 12.3 |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Unum US | Accounting Standards Update 2018-12 | Group Disability |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Removal of Shadow Adjustments, LFPB |  |  |  |  |  |  |  |  |  | (1,025.2) |  |  |
Effect of Change in Discount Rate Assumptions |  |  |  |  |  |  |  |  |  | 911.9 |  |  |
Other increase (decrease) |  |  |  |  |  |  |  |  |  | 0.0 |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Unum US | Accounting Standards Update 2018-12 | Group Life and AD&D |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Removal of Shadow Adjustments, LFPB |  |  |  |  |  |  |  |  |  | (88.5) |  |  |
Effect of Change in Discount Rate Assumptions |  |  |  |  |  |  |  |  |  | 91.9 |  |  |
Other increase (decrease) |  |  |  |  |  |  |  |  |  | 0.0 |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Unum US | Accounting Standards Update 2018-12 | Individual Disability |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Removal of Shadow Adjustments, LFPB |  |  |  |  |  |  |  |  |  | (446.1) |  |  |
Effect of Change in Discount Rate Assumptions |  |  |  |  |  |  |  |  |  | 728.5 |  |  |
Other increase (decrease) |  |  |  |  |  |  |  |  |  | 0.0 |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Unum US | Accounting Standards Update 2018-12 | Voluntary Benefits |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Removal of Shadow Adjustments, LFPB |  |  |  |  |  |  |  |  |  | (9.9) |  |  |
Effect of Change in Discount Rate Assumptions |  |  |  |  |  |  |  |  |  | 519.5 |  |  |
Other increase (decrease) |  |  |  |  |  |  |  |  |  | (5.3) |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Unum US | Accounting Standards Update 2018-12 | Dental and Vision |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Removal of Shadow Adjustments, LFPB |  |  |  |  |  |  |  |  |  | 0.0 |  |  |
Effect of Change in Discount Rate Assumptions |  |  |  |  |  |  |  |  |  | 0.0 |  |  |
Other increase (decrease) |  |  |  |  |  |  |  |  |  | 0.0 |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Colonial Life | Accounting Standards Update 2018-12 |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Removal of Shadow Adjustments, LFPB | [8] |  |  |  |  |  |  |  |  | (44.5) |  |  |
Adjustments for Loss Contracts | [9] |  |  |  |  |  |  |  |  | 34.9 |  |  |
Effect of Change in Discount Rate Assumptions |  |  |  |  |  |  |  |  |  | 568.6 |  |  |
Other increase (decrease) | [10] |  |  |  |  |  |  |  |  | (7.6) |  |  |
Removal of Shadow Adjustments, DAC |  |  |  |  |  |  |  |  |  | 72.8 |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Unum International | Accounting Standards Update 2018-12 |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Removal of Shadow Adjustments, LFPB | [8] |  |  |  |  |  |  |  |  | (545.8) |  |  |
Adjustments for Loss Contracts | [9] |  |  |  |  |  |  |  |  | 0.0 |  |  |
Effect of Change in Discount Rate Assumptions |  |  |  |  |  |  |  |  |  | 779.4 |  |  |
Other increase (decrease) | [10] |  |  |  |  |  |  |  |  | 0.0 |  |  |
Removal of Shadow Adjustments, DAC |  |  |  |  |  |  |  |  |  | 0.0 |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Closed Block | Accounting Standards Update 2018-12 |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Removal of Shadow Adjustments, LFPB | [8] |  |  |  |  |  |  |  |  | (4,065.6) |  |  |
Adjustments for Loss Contracts | [9] |  |  |  |  |  |  |  |  | 0.0 |  |  |
Effect of Change in Discount Rate Assumptions |  |  |  |  |  |  |  |  |  | 12,484.8 |  |  |
Other increase (decrease) | [10] |  |  |  |  |  |  |  |  | 0.0 |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Closed Block | Accounting Standards Update 2018-12 | Long-term Care |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Removal of Shadow Adjustments, LFPB |  |  |  |  |  |  |  |  |  | (3,465.4) |  |  |
Effect of Change in Discount Rate Assumptions |  |  |  |  |  |  |  |  |  | 9,922.9 |  |  |
Cumulative Effect, Period of Adoption, Adjustment | Closed Block | Accounting Standards Update 2018-12 | Other Insurance Product Line |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Removal of Shadow Adjustments, LFPB |  |  |  |  |  |  |  |  |  | (600.2) |  |  |
Effect of Change in Discount Rate Assumptions |  |  |  |  |  |  |  |  |  | 2,561.9 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Acquisition Costs |  |  |  |  |  |  |  |  |  | 2,357.7 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  |  |  |  |  |  |  |  |  | 55,585.4 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Unum US |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Acquisition Costs |  |  |  |  |  |  |  |  |  | 1,181.0 |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  |  |  |  |  |  |  |  |  | 12,861.4 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Unum US | Group Disability |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  |  |  |  |  |  |  |  |  | 7,295.7 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Unum US | Group Life and AD&D |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  |  |  |  |  |  |  |  |  | 1,127.3 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Unum US | Individual Disability |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  |  |  |  |  |  |  |  |  | 2,767.7 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Unum US | Voluntary Benefits |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  |  |  |  |  |  |  |  |  | 1,659.2 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Unum US | Dental and Vision |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  |  |  |  |  |  |  |  |  | 11.5 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Colonial Life |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Acquisition Costs |  |  |  |  |  |  |  |  |  | 1,144.7 |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  |  |  |  |  |  |  |  |  | 2,528.6 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Unum International |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Acquisition Costs |  |  |  |  |  |  |  |  |  | 32.0 |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  |  |  |  |  |  |  |  |  | 3,203.4 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Closed Block |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  |  |  |  |  |  |  |  |  | 36,992.0 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Closed Block | Long-term Care |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  |  |  |  |  |  |  |  |  | 22,740.9 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Closed Block | Other Insurance Product Line |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for Future Policy Benefit, before Reinsurance, after other |  |  |  |  |  |  |  |  |  | $ 14,251.1 |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance | Retained Earnings | Accounting Standards Update 2018-12 |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Effect on Opening Balance in Period of Adoption [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent |  |  |  |  |  |  | $ 13,141.3 |  | $ 11,989.4 |  |  |  |
[1] | 2 We previously reported policy and contract benefits and reserves for future policy and contract benefits liabilities in our consolidated balance sheet as of March 31, 2022 of $1,874.2 million and $45,258.0 million, respectively, resulting in total policyholder liabilities of $47,132.2 million. These balances were reclassified into new line items, future policy benefits and policyholders' account balances, which would have reported balances of $41,368.2 million and $5,764.0 million, respectively, as of March 31, 2022, resulting in total policyholder liabilities of $47,132.2 million under the historical accounting method.
[2] | 1 We previously reported policy and contract benefits and reserves for future policy and contract benefits liabilities in our consolidated balance sheet as of December 31, 2022 of $1,839.8 million and $42,330.2 million, respectively, resulting in total policyholder liabilities of $44,170.0 million. These balances were reclassified into new line items, future policy benefits and policyholders' account balances, which would have reported balances of $38,443.2 million and $5,726.8 million, respectively, as of December 31, 2022, resulting in total policyholder liabilities of $44,170.0 million under the historical accounting method.
[3] | 1 The change in other assets is driven by the cost of reinsurance associated with the second phase of our Closed Block individual disability reinsurance transaction which was completed in the first quarter of 2021. In accordance with the provisions of the ASU related to non-contemporaneous reinsurance, we were then required to establish the ceded reserves using an upper-medium grade fixed-income instrument as of the reinsurance transaction date in March 2021 which resulted in higher ceded reserves compared to that which was reported historically.
[4] | 1 Previously disclosed as Benefits and Change in Reserves for Future Benefits
[5] | 5 These amounts represent the portion of reinsurance recoverable related to the liability for future policy benefits. These amounts include the adjustments for the removal of shadow adjustments and for the effect of change in discount rate assumptions for the liability for future policy benefits ceded to third party reinsurers.
[6] | 1 We previously reported policy and contract benefits and reserves for future policy and contract benefits liabilities in our consolidated balance sheet as of December 31, 2020 of $1,855.4 million and $49,653.0 million, respectively, resulting in total policyholder liabilities of $51,508.4 million. These balances were reclassified into new line items, future policy benefits and policyholders' account balances, which would have reported balances of $45,704.4 million and $5,804.0 million as of December 31, 2020, respectively, resulting in total policyholder liabilities of $51,508.4 million under the historical accounting method. These balances were reclassified to more closely align with the new disclosure requirements of ASU 2018-12.
[7] | 1 Unum US excludes dental & vision and medical stop-loss product lines 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.
[8] | 2 Shadow adjustments represent the adjustments related to unrealized investment gains and losses previously included in the reserves balance prior to the adoption of ASU 2018-12.
[9] | 3 Adjustment for loss contracts represents the adjustment for those cohorts whose net premium ratio exceeded 100 percent as of the transition date. For those cohorts, the net premiums were set equal to the gross premiums and the difference was recorded as a transition adjustment to the liability for future policy benefits.
[10] | 4 This amount reflects the effect of the reclassification of certain unearned premium. This amount was reclassified to more closely align with the presentation of liabilities under ASU 2018-12 and had no impact to stockholders' equity.
[11] | 1 The $12.3 million removal of shadow adjustments is related to the Unum US voluntary benefits product line.

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