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v3.25.1

Segment Information - Reconciliation of Other Items from Segments to Consolidated (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting Information [Line Items] |  |
Deferred Policy Acquisition Costs, Amortization Expense | $ 607 | $ 545
Insurance operating costs and other expense | 1,352 | 1,283
Amortization of other intangible assets | 18 | 18
Benefits, Losses and Expenses | 6,027 | 5,508
Policyholder Benefits and Claims Incurred, Net | 4,000 | 3,611
Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Deferred Policy Acquisition Costs, Amortization Expense | 607 | 545
Amortization of other intangible assets | 18 | 18
Benefits, Losses and Expenses | 5,944 | 5,424
Operating Segments [Member] | P&C Business Insurance |  |
Segment Reporting Information [Line Items] |  |
Prior accident year development [1] | (83) | (56)
Deferred Policy Acquisition Costs, Amortization Expense | 531 | 476
Insurance operating costs and other expense | 512 | 487
Amortization of other intangible assets | 7 | 7
Policyholder Dividends, Expense | 10 | 10
Benefits, Losses and Expenses | 3,148 | 2,758
Operating Segments [Member] | P&C Personal Insurance |  |
Segment Reporting Information [Line Items] |  |
Prior accident year development [1] | (39) | (7)
Deferred Policy Acquisition Costs, Amortization Expense | 68 | 60
Insurance operating costs and other expense | 182 | 153
Amortization of other intangible assets | 1 | 1
Benefits, Losses and Expenses | 962 | 834
Operating Segments [Member] | Property & Casualty Other Operations [Member] |  |
Segment Reporting Information [Line Items] |  |
Prior accident year development [1] | 0 | 7
Deferred Policy Acquisition Costs, Amortization Expense | 0 | 0
Insurance operating costs and other expense | 2 | 2
Amortization of other intangible assets | 0 | 0
Benefits, Losses and Expenses | 2 | 9
Operating Segments [Member] | Employee Benefits [Member] |  |
Segment Reporting Information [Line Items] |  |
Deferred Policy Acquisition Costs, Amortization Expense | 8 | 9
Insurance operating costs and other expense | 406 | 397
Amortization of other intangible assets | 10 | 10
Benefits, Losses and Expenses | 1,623 | 1,620
Operating Segments [Member] | Employee Benefits [Member] | Disability Insurance Policy [Member] |  |
Segment Reporting Information [Line Items] |  |
Policyholder Benefits and Claims Incurred, Net | 621 | 624
Operating Segments [Member] | Employee Benefits [Member] | Life Insurance Product Line [Member] |  |
Segment Reporting Information [Line Items] |  |
Policyholder Benefits and Claims Incurred, Net | 519 | 533
Operating Segments [Member] | Employee Benefits [Member] | Insurance, Other [Member] |  |
Segment Reporting Information [Line Items] |  |
Policyholder Benefits and Claims Incurred, Net | 59 | 47
Operating Segments [Member] | Hartford Funds [Member] |  |
Segment Reporting Information [Line Items] |  |
Deferred Policy Acquisition Costs, Amortization Expense | 0 | 0
Amortization of other intangible assets | 0 | 0
Benefits, Losses and Expenses | 209 | 203
Investment Company, General Partner, Advisory Service Allocation | 73 | 69
Employee Benefits and Share-Based Compensation | 39 | 35
Selling Expense | 73 | 73
Other General and Administrative Expense | 24 | 26
Non-Catastrophe [Member] | Operating Segments [Member] | P&C Business Insurance |  |
Segment Reporting Information [Line Items] |  |
Current accident year | 1,891 | 1,725
Non-Catastrophe [Member] | Operating Segments [Member] | P&C Personal Insurance |  |
Segment Reporting Information [Line Items] |  |
Current accident year | 563 | 575
Catastrophe | Operating Segments [Member] | P&C Business Insurance |  |
Segment Reporting Information [Line Items] |  |
Current accident year | 280 | 109
Catastrophe | Operating Segments [Member] | P&C Personal Insurance |  |
Segment Reporting Information [Line Items] |  |
Current accident year | $ 187 | $ 52

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482686/350-30-45-2 + Details
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