Retirement Plan	12 Months Ended
Dec. 31, 2024
Retirement Benefits [Abstract]
Retirement Plan	Retirement Plan Centene has a defined contribution plan which covers substantially all team members who are at least 21 years of age. Under the plan, eligible team members 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 $136 million, $131 million and $133 million during the years ended December 31, 2024, 2023 and 2022, respectively.

The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans.

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-Topic 710
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 712
-Name Accounting Standards Codification
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-Topic 715
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/715/tableOfContent

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-Topic 718
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/718/tableOfContent

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