XML 38 R28.htm IDEA: XBRL DOCUMENT
v3.23.1

Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | Components of our accumulated other comprehensive loss, after tax, and related changes are as follows:
| Net Unrealized Gain (Loss) on Securities |  | Effect of Change in Discount Rate Assumptions on the LFPB 1 |  | Net Gain (Loss) on Hedges |  | Foreign Currency Translation Adjustment |  | Unrecognized Pension and Postretirement Benefit Costs |  | Total
| (in millions of dollars)
Balance at December 31, 2022 | $ | (3,028.4) |  |  | $ | 313.9 |  |  | $ | (9.6) |  |  | $ | (390.1) |  |  | $ | (334.1) |  |  | $ | (3,448.3) |
Other Comprehensive Income (Loss) Before Reclassifications | 823.4 |  |  | (573.9) |  |  | 25.6 |  |  | 24.7 |  |  | (6.7) |  |  | 293.1 |
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss | (0.2) |  |  | — |  |  | (8.2) |  |  | — |  |  | 1.3 |  |  | (7.1) |
Net Other Comprehensive Income (Loss) | 823.2 |  |  | (573.9) |  |  | 17.4 |  |  | 24.7 |  |  | (5.4) |  |  | 286.0 |
Balance at March 31, 2023 | $ | (2,205.2) |  |  | $ | (260.0) |  |  | $ | 7.8 |  |  | $ | (365.4) |  |  | $ | (339.5) |  |  | $ | (3,162.3) |
Balance at December 31, 2021 | $ | 4,014.4 |  |  | $ | (8,570.7) |  |  | $ | 61.8 |  |  | $ | (274.1) |  |  | $ | (396.0) |  |  | $ | (5,164.6) |
Other Comprehensive Income (Loss) Before Reclassifications | (2,903.8) |  |  | 3,658.1 |  |  | 0.4 |  |  | (32.0) |  |  | 1.1 |  |  | 723.8 |
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss | 10.0 |  |  | — |  |  | (10.8) |  |  | — |  |  | 3.1 |  |  | 2.3 |
Net Other Comprehensive Income (Loss) | (2,893.8) |  |  | 3,658.1 |  |  | (10.4) |  |  | (32.0) |  |  | 4.2 |  |  | 726.1 |
Balance at March 31, 2022 | $ | 1,120.6 |  |  | $ | (4,912.6) |  |  | $ | 51.4 |  |  | $ | (306.1) |  |  | $ | (391.8) |  |  | $ | (4,438.5) |
1 Liability for Future Policy Benefits |  |  |  |  |  |  |  |  |  |  |
Effect of Change in Discount Rate Assumptions on the Liability for Future Policy Benefits | The effect of change in discount rate assumptions on the liability for future policy benefits consists of the following components:
|  | March 31 |  | December 31 |  |
|  | 2023 |  | 2022 |  | Change
|  | (in millions of dollars)
Future Policy Benefits |  | $ | (437.9) |  |  | $ | 445.0 |  |  | $ | (882.9) |
Reinsurance Recoverable |  | (592.3) |  |  | (748.4) |  |  | 156.1 |
Income Tax |  | 770.2 |  |  | 617.3 |  |  | 152.9 |
Total |  | $ | (260.0) |  |  | $ | 313.9 |  |  | $ | (573.9) |
|  | March 31 |  | December 31 |  |
|  | 2022 |  | 2021 |  | Change
|  | (in millions of dollars)
Future Policy Benefits |  | $ | (7,168.8) |  |  | $ | (12,565.6) |  |  | $ | 5,396.8 |
Reinsurance Recoverable |  | 236.6 |  |  | 992.5 |  |  | (755.9) |
Income Tax |  | 2,019.6 |  |  | 3,002.4 |  |  | (982.8) |
Total |  | $ | (4,912.6) |  |  | $ | (8,570.7) |  |  | $ | 3,658.1 |
Schedule of Reclassification out of Accumulated Other Comprehensive Income (Loss) | Amounts reclassified from accumulated other comprehensive loss were recognized in our consolidated statements of income as follows:
|  | Three Months Ended March 31
|  | 2023 |  | 2022
|  | (in millions of dollars)
Net Unrealized Gain (Loss) on Securities |  |  |  |
Net Investment Gain (Loss) |  |  |  |
Net Gain (Loss) on Sales of Fixed Maturity Securities |  | $ | 0.3 |  |  | $ | (8.5) |
Credit Losses on Fixed Maturity Securities |  | — |  |  | (4.1) |
|  | 0.3 |  |  | (12.6) |
Income Tax Expense (Benefit) |  | 0.1 |  |  | (2.6) |
Total |  | $ | 0.2 |  |  | $ | (10.0) |
Net Gain (Loss) on Hedges |  |  |  |
Net Investment Income |  |  |  |
Gain on Interest Rate Swaps |  | $ | 10.4 |  |  | $ | 13.4 |
Gain on Foreign Exchange Contracts |  | — |  |  | 0.3 |
|  | 10.4 |  |  | 13.7 |
Income Tax Expense |  | 2.2 |  |  | 2.9 |
Total |  | $ | 8.2 |  |  | $ | 10.8 |
Unrecognized Pension and Postretirement Benefit Costs |  |  |  |
Other Expenses |  |  |  |
Amortization of Net Actuarial Loss |  | $ | (1.8) |  |  | $ | (4.0) |
Amortization of Prior Service Credit |  | 0.1 |  |  | 0.1 |
|  | (1.7) |  |  | (3.9) |
Income Tax Benefit |  | (0.4) |  |  | (0.8) |
Total |  | $ | (1.3) |  |  | $ | (3.1) |

X
- Definition Effect of Change in Discount Rate Assumptions on the Liability for Future Policy Benefits + References No definition available. + Details
Name: | unm_EffectOfChangeInDiscountRateAssumptionsOnTheLiabilityForFuturePolicyBenefitsTableTextBlock
Namespace Prefix: | unm_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
Name: | us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481674/830-30-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481694/830-30-45-20 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration