XML 44 R34.htm IDEA: XBRL DOCUMENT
v3.23.2

Stockholders' Equity and Earnings Per Common Share (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2023
Stockholders' Equity and Earnings Per Common Share [Abstract] |
Schedule of Basic and Diluted Earnings Per Share | Net income per common share is determined as follows:
| Three Months Ended June 30 |  | Six Months Ended June 30
| 2023 |  | 2022 |  | 2023 |  | 2022
| (in millions of dollars, except share data)
Numerator |  |  |  |  |  |  |
Net Income | $ | 392.9 |  |  | $ | 367.3 |  |  | $ | 751.2 |  |  | $ | 607.7 |
Denominator (000s) |  |  |  |  |  |  |
Weighted Average Common Shares - Basic | 197,180.4 |  |  | 201,151.7 |  |  | 197,641.3 |  |  | 201,888.8 |
Dilution for Assumed Exercises of Nonvested Stock Awards | 956.1 |  |  | 1,280.0 |  |  | 1,182.5 |  |  | 1,077.7 |
Weighted Average Common Shares - Assuming Dilution | 198,136.5 |  |  | 202,431.7 |  |  | 198,823.8 |  |  | 202,966.5 |
Net Income Per Common Share |  |  |  |  |  |  |
Basic | $ | 1.99 |  |  | $ | 1.83 |  |  | $ | 3.80 |  |  | $ | 3.01 |
Assuming Dilution | $ | 1.98 |  |  | $ | 1.81 |  |  | $ | 3.78 |  |  | $ | 2.99 |
Treasury Stock Transactions | Common stock repurchases, which are accounted for using the cost method and classified as treasury stock until otherwise retired, were as follows:
| Three Months Ended June 30 |  | Six Months Ended June 30 |
| 2023 |  | 2022 |  | 2023 |  | 2022 |  |
| (in millions)
Shares Repurchased | 1.1 |  |  | 1.8 |  |  | 2.4 |  |  | 3.1 |  |  |
Cost of Shares Repurchased 1 | $ | 47.0 |  |  | $ | 57.4 |  |  | $ | 100.6 |  |  | $ | 94.9 |  |  |
1Includes $0.1 million of commissions for the three and six months ended June 30, 2023 and $0.1 million of commission for the three and six months ended June 30, 2022. There was $0.4 million and $0.5 million of excise tax for the three and six months ended June 30, 2023, respectively. There were no excise taxes during the three and six months ended June 30, 2022.

X
- Definition Stockholders' Equity and Earnings Per Common Share [Abstract] + References No definition available. + Details
Name: | unm_StockholdersEquityandEarningsPerCommonShareAbstract
Namespace Prefix: | unm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481520/505-30-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481520/505-30-50-3 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481520/505-30-50-4 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481549/505-30-45-1 + Details
Name: | us-gaap_ScheduleOfTreasuryStockByClassTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration