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ACCOUNTS RECEIVABLE - Schedule of Estimated Costs for Charity Care and Self-Pay Patients (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Accounts receivable and allowance for doubtful accounts |  |  |  |
Estimated costs of caring | $ 144 | $ 157 | $ 421 | $ 474
Uninsured patients |  |  |  |
Accounts receivable and allowance for doubtful accounts |  |  |  |
Estimated costs of caring | 99 | 135 | 317 | 406
Charity care patients |  |  |  |
Accounts receivable and allowance for doubtful accounts |  |  |  |
Estimated costs of caring | $ 45 | $ 22 | $ 104 | $ 68

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