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Medical Costs Payable, Incurred and Paid Medical Cost Development (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Acquisitions (dispositions), net | $ (755) |  |
Medical costs payable included within businesses held for sale | (179) | $ 0 | $ 0
Health Insurance Product Line [Member] |  |  |
Net Incurred Medical Costs | 507,041 |  |
Net Cumulative Medical Payments | (472,002) |  |
Net remaining outstanding liabilities prior to 2023 | 119 |  |
Total Medical costs payable | 34,224 |  |
Health Insurance Product Line [Member] | Short-duration Insurance Contracts, Accident Year 2023 [Member] |  |  |
Net Incurred Medical Costs | 242,156 | 242,734 |
Net Cumulative Medical Payments | (240,112) | $ (211,380) |
Health Insurance Product Line [Member] | Short-duration Insurance Contracts, Accident Year 2024 [Member] |  |  |
Net Incurred Medical Costs | 264,885 |  |
Net Cumulative Medical Payments | $ (231,890) |  |

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- Definition Amount, after reinsurance, of paid claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 9E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-9E Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-4B + Details
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- Definition Undiscounted amount, after reinsurance, of incurred claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 9E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-9E Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-4B + Details
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