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Revenue Recognition and Deferred Revenue (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Contract with Customer, Liability, Revenue Recognized $ 1    
Revenue from Contract with Customer, Excluding Assessed Tax 9 $ 7  
Contract with Customer, Receivable, after Allowance for Credit Loss 3   $ 2
Contract with Customer, Asset, after Allowance for Credit Loss 6   4
Contract with Customer, Liability 1   $ 1
Contract with Customer, Performance Obligation Satisfied in Previous Period 4 3  
Employer Stop Loss      
Revenue from Contract with Customer, Excluding Assessed Tax 4 3  
Affinity Products      
Revenue from Contract with Customer, Excluding Assessed Tax 5 4  
Other Income From Revenue From Contract with Customer      
Revenue from Contract with Customer, Excluding Assessed Tax $ 0 $ 0  
Minimum [Member]      
Employee Stop Loss Time When Base Commissions Recognized Begin and End In Months 17    
Maximum [Member]      
Employee Stop Loss Time When Base Commissions Recognized Begin and End In Months 20