XML 78 R68.htm IDEA: XBRL DOCUMENT
v3.23.1

Policyholder Account Balance, Guaranteed Minimum Crediting (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Mar. 31, 2022
--- | --- | ---
Operating Segments |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | $ 5,565.6 | $ 5,630.3
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Operating Segments |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 5,338.5 | 5,410.7
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Operating Segments |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 220.6 | 213.1
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Operating Segments |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 6.5 | 6.5
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Operating Segments |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance |  |
Colonial Life |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 851.7 | 848.9
Colonial Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 851.7 | 848.9
Colonial Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 845.6 | 843.1
Colonial Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 6.1 | 5.8
Colonial Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Colonial Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Other Insurance Product Line | Closed Block |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 4,131.5 | 4,187.0
Other Insurance Product Line | Closed Block | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 4,095.7 | 4,151.7
Other Insurance Product Line | Closed Block | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 29.3 | 28.8
Other Insurance Product Line | Closed Block | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 6.5 | 6.5
Other Insurance Product Line | Closed Block | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 1,547.2 | 1,806.1
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 1,511.4 | 1,770.8
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 29.3 | 28.8
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 6.5 | 6.5
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 27.0 | 29.3
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 27.0 | 29.3
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 2,371.6 | 2,193.7
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 2,371.6 | 2,193.7
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 185.7 | 157.9
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 185.7 | 157.9
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Voluntary Benefits | Unum US |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 582.4 | 594.4
Voluntary Benefits | Unum US | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 397.2 | 415.9
Voluntary Benefits | Unum US | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 185.2 | 178.5
Voluntary Benefits | Unum US | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Voluntary Benefits | Unum US | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 93.1 | 96.6
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 93.1 | 96.6
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 456.0 | 463.0
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 270.8 | 284.5
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 185.2 | 178.5
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 33.3 | 34.8
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 33.3 | 34.8
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | 0.0 | 0.0
Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, before Reserves in excess of Account Balance | $ 0.0 | $ 0.0
Maximum | Colonial Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 5.00%
Maximum | Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 5.99%
Maximum | Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 8.99%
Maximum | Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 11.99%
Maximum | Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 15.00%
Maximum | Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 3.99%
Maximum | Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 4.99%
Maximum | Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 6.00%
Minimum | Colonial Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 4.00%
Minimum | Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 3.00%
Minimum | Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 6.00%
Minimum | Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 9.00%
Minimum | Other Insurance Product Line | Closed Block | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 12.00%
Minimum | Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 3.00%
Minimum | Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 4.00%
Minimum | Voluntary Benefits | Unum US | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |
Policyholder Account Balance, Guaranteed Minimum Credit Rating |  | 5.00%

X
- Definition Policyholder Account Balance, before Reserves in excess of Account Balance + References No definition available. + Details
Name: | unm_PolicyholderAccountBalanceBeforeReservesInExcessOfAccountBalance
Namespace Prefix: | unm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Guaranteed minimum crediting rate on policyholder account balance. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29F -Publisher FASB -URI https://asc.fasb.org//1943274/2147480046/944-40-55-29F Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-7A + Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditRating
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29F -Publisher FASB -URI https://asc.fasb.org//1943274/2147480046/944-40-55-29F Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-7A + Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateAxis=us-gaap_PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateAxis=us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateAxis=us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0150Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateAxis=us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0151AndGreaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis=unm_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0400And0500Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=unm_ColonialLifeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_OtherInsuranceProductLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=unm_ClosedBlockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis=unm_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0300And0599Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis=unm_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0600And0899Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis=unm_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0900And1199Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis=unm_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom1200And1500Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=unm_VoluntaryBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=unm_UnumUsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis=us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0300To0399Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis=unm_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0400And0499Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis=unm_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0500And0600Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |