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REVENUE RECOGNITION (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Percentage of net revenues	100.00%	100.00%	100.00%	100.00%
Net accounts receivable	100.00%		100.00%		100.00%
DIS business
Segment Reporting Information [Line Items]
Percentage of net revenues	98.00%	97.00%	98.00%	97.00%
Net accounts receivable	98.00%		98.00%		98.00%
DIS business | Healthcare Insurers
Segment Reporting Information [Line Items]
Percentage of net revenues	39.00%	41.00%	39.00%	40.00%
Net accounts receivable	29.00%		29.00%		26.00%
DIS business | Healthcare Insurers | Fee-for-service
Segment Reporting Information [Line Items]
Percentage of net revenues	37.00%	38.00%	36.00%	37.00%
DIS business | Healthcare Insurers | Capitated
Segment Reporting Information [Line Items]
Percentage of net revenues	2.00%	3.00%	3.00%	3.00%
DIS business | Government payers (principally fee-for-service)
Segment Reporting Information [Line Items]
Percentage of net revenues	16.00%	13.00%	16.00%	12.00%
Net accounts receivable	9.00%		9.00%		7.00%
DIS business | Client Payers
Segment Reporting Information [Line Items]
Percentage of net revenues	31.00%	33.00%	31.00%	33.00%
Net accounts receivable	41.00%		41.00%		45.00%
DIS business | Patients (including coinsurance and deductible responsibilities)
Segment Reporting Information [Line Items]
Percentage of net revenues	12.00%	10.00%	12.00%	12.00%
Net accounts receivable	19.00%		19.00%		20.00%
DIS business | Minimum
Segment Reporting Information [Line Items]
Percentage of net revenues	97.00%	97.00%	97.00%	97.00%
All other operating segments | DS Businesses
Segment Reporting Information [Line Items]
Percentage of net revenues	2.00%	3.00%	2.00%	3.00%
Net accounts receivable	2.00%		2.00%		2.00%

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