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DESCRIPTION OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)
$ in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
segment
Dec. 31, 2025
USD ($)
Product Information [Line Items]    
Number of reportable segments | segment 1  
Prepayments offsetting accrued health insurance costs $ 66 $ 62
ERTC receivables 334 384
ERTC distributed 22 19
Health Care    
Product Information [Line Items]    
Prepayments offsetting accrued health insurance costs $ 81 $ 87
Non-US | Revenue | Foreign Sales    
Product Information [Line Items]    
Percent of concentration risk (less than) 1.00%