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REPORTING ENTITY (Details) - Premiums and services revenue - Government contracts concentration risk
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Federal government contracts      
Concentration Risk [Line Items]      
Concentration risk (percent) 83.00% 83.00% 82.00%
CMS, coverage for individual Medicare Advantage members in Florida      
Concentration Risk [Line Items]      
Concentration risk (percent) 15.00%