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Retirement Plan
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12 Months Ended |
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Dec. 31, 2014
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| Retirement Plan [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 $12 million, $9 million and $7 million during the years ended December 31, 2014, 2013 and 2012, respectively. |