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Medical Costs Payable (Tables) | 12 Months Ended
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Dec. 31, 2024
Insurance [Abstract] |
Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] | The following table shows the components of the change in medical costs payable for the years ended December 31:
(in millions) |  | 2024 |  | 2023 |  | 2022
Medical costs payable, beginning of period |  | $ | 32,395 |  |  | $ | 29,056 |  |  | $ | 24,483 |
Acquisitions (dispositions), net |  | (755) |  |  | 1 |  |  | 308 |
Reported medical costs: |  |  |  |  |  |
Current year |  | 264,885 |  |  | 242,734 |  |  | 211,252 |
Prior years |  | (700) |  |  | (840) |  |  | (410) |
Total reported medical costs |  | 264,185 |  |  | 241,894 |  |  | 210,842 |
Medical payments: |  |  |  |  |  |
Payments for current year |  | (231,890) |  |  | (211,380) |  |  | (184,049) |
Payments for prior years |  | (29,532) |  |  | (27,176) |  |  | (22,528) |
Total medical payments |  | (261,422) |  |  | (238,556) |  |  | (206,577) |
Less: medical costs payable included within businesses held for sale |  | (179) |  |  | — |  |  | — |
Medical costs payable, end of period |  | $ | 34,224 |  |  | $ | 32,395 |  |  | $ | 29,056 |
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Table Text Block] | The following is information about incurred and paid medical cost development as of December 31, 2024:
|  | Net Incurred Medical Costs
(in millions) |  | For the Years Ended December 31,
Year |  | 2023 |  | 2024
2023 |  | $ | 242,734 |  |  | $ | 242,156 |
2024 |  |  |  | 264,885 |
Total |  |  |  | $ | 507,041 |
|  | Net Cumulative Medical Payments
(in millions) |  | For the Years Ended December 31,
Year |  | 2023 |  | 2024
2023 |  | $ | (211,380) |  |  | $ | (240,112) |
2024 |  |  |  | (231,890) |
Total |  |  |  | (472,002) |
Net remaining outstanding liabilities prior to 2023 |  |  |  | 119 |
Acquisitions (dispositions), net |  |  |  | (755) |
Medical costs payable included within businesses held for sale |  |  |  | (179) |
Total medical costs payable |  |  |  | $ | 34,224 |

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- Definition Tabular disclosure of the activity in the reserve for settling insured claims and expenses incurred in the claims settlement process for the period. The estimated liability includes the amount of money that will be required for future payments of (a) claims that have been reported to the insurer, (b) claims related to insured events that have occurred but that have not been reported to the insurer as of the date the liability is estimated, and (c) claim adjustment expenses. Claim adjustment expenses include costs incurred in the claim settlement process such as legal fees; outside adjuster fees; and costs to record, process, and adjust claims. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 + Details
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- Definition Tabular disclosure for the reconciliation of claims development to the liability for unpaid claims and claim adjustment expense for short-duration insurance contracts. + 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/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-4C + Details
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