Medical Costs Payable, Incurred and Paid Medical Cost Development (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Changes in premium deficiency and loss contracts reserves | $ 672 | ||
| Acquisitions | 32 | ||
| Medical costs payable included within businesses held for sale | (489) | $ (179) | $ 0 |
| Health Insurance Product Line [Member] | |||
| Net Incurred Medical Costs | 578,685 | ||
| Net Cumulative Medical Payments | (539,453) | ||
| Net remaining outstanding liabilities prior to 2024 | 562 | ||
| Total Medical costs payable | 39,337 | ||
| Health Insurance Product Line [Member] | Short-duration Insurance Contracts, Accident Year 2024 [Member] | |||
| Net Incurred Medical Costs | 264,550 | 264,885 | |
| Net Cumulative Medical Payments | (262,318) | $ (231,890) | |
| Health Insurance Product Line [Member] | Short-duration Insurance Contracts, Accident Year 2025 [Member] | |||
| Net Incurred Medical Costs | 313,463 | ||
| Net Cumulative Medical Payments | $ (277,135) |