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Business Optimization Initiatives
 6 Months Ended
Jun. 30, 2022
Business Optimization Initiatives [Abstract]  
Business Optimization Initiatives Business Optimization Initiatives
Provided below is a summary of the activity, by reportable segment, related to the liability for employee termination costs previously incurred in connection with our enterprise-wide business optimization initiatives introduced in 2020.
Commercial & Specialty BusinessGovernment BusinessIngenioRxOtherTotal
2020 Business Optimization Initiatives
Employee termination costs:
Liability for employee termination costs at January 1, 2022$61 $57 $1 $3 $122 
Payments(10)(10)— — (20)
Liability for employee termination costs at June 30, 2022
$51 $47 $1 $3 $102