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Retirement Plan
12 Months Ended
Dec. 31, 2018
Retirement Benefits [Abstract]  
Retirement Plan
Retirement Plan
 
Centene has a defined contribution plan which covers substantially all employees who are at least twenty-one years of age. Under the plan, eligible employees may contribute a percentage of their base salary, subject to certain limitations. Centene may elect to match a portion of the employee's contribution. Company expense related to matching contributions to the plan was $53 million, $42 million and $37 million during the years ended December 31, 2018, 2017 and 2016, respectively.