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Restructuring and Other Costs, Before Tax (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 48 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and other costs | $ 0 | $ 3 | $ 1 | $ 3 |
Hartford Next Program |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and other costs | 0 | 3 | 1 | 3 | $ 125
Employee Severance | Hartford Next Program |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and other costs | 0 | 0 | 0 | (3) | 35
Information Technology | Hartford Next Program |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and other costs | 0 | 1 | 0 | 2 | 25
Professional fees and other expenses | Hartford Next Program |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and other costs | 0 | $ 2 | 1 | $ 4 | 65
Other Operating Income (Expense) [Member] | Hartford Next Program |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and Related Cost, Expected Cost | 126 |  | 126 |  | 126
Other Operating Income (Expense) [Member] | Employee Severance | Hartford Next Program |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and Related Cost, Expected Cost | 35 |  | 35 |  | 35
Other Operating Income (Expense) [Member] | Information Technology | Hartford Next Program |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and Related Cost, Expected Cost | 25 |  | 25 |  | 25
Other Operating Income (Expense) [Member] | Professional fees and other expenses | Hartford Next Program |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring and Related Cost, Expected Cost | $ 66 |  | $ 66 |  | $ 66

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- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4.d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4.b.1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 + Details
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