SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Patient Accounts Receivable Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Dec. 31, 2023
Concentration Risk [Line Items]
Accounts receivable derived from Medicare	55.00%	69.00%
Net service revenue period of care payment rate (days)	30 days
Percentage of patient receivables outstanding	10.00%
Historical collection rate from Medicare	99.00%
Change Healthcare
Concentration Risk [Line Items]
Increase (Decrease) in Accounts and Other Receivables	$ 60.0
Payor Concentration Risk \| Accounts Receivable \| Single Payor
Concentration Risk [Line Items]
Concentration risk (percent)	13.00%

Accounts Receivable, Portion Derived From Medicare

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Historical collection rate from Medicare.

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Description containing the number of days from the date the request for anticipated payment was received in which the final bill must be submitted to Medicare.

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Percentage of patient receivables outstanding.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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The increase (decrease) during the reporting period in the amount due from customers for the credit sale of goods and services; includes accounts receivable and other types of receivables.

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