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Organization and Operations	12 Months Ended
	Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Operations	Organization and Operations Centene Corporation, or the Company, is a leading provider of government-sponsored healthcare. Centene's focus is on improving health and health care for low-income populations with complex needs. The Company provides access to high-quality healthcare, innovative programs and a wide range of health solutions that help families and individuals get well, stay well and be well. The Company operates in four segments: (1) a Medicaid segment, (2) a Medicare segment, (3) a Commercial segment and (4) an Other segment. The Medicaid, Medicare and Commercial segments primarily represent the government-sponsored or subsidized programs under which the Company offers managed healthcare services. Specifically, the Medicaid segment includes the Temporary Assistance for Needy Families (TANF) program, Medicaid Expansion programs, the Aged, Blind or Disabled (ABD) program, the Children's Health Insurance Program (CHIP), Long-Term Services and Supports (LTSS), Foster Care, Medicare-Medicaid Plans (MMP), which cover beneficiaries who are dually eligible for Medicaid and Medicare and other state-based programs. The Medicare segment includes Medicare Advantage, Medicare Supplement, Dual Eligible Special Needs Plans (D-SNPs) and Medicare Prescription Drug Plans (PDPs), also known as Medicare Part D. The Commercial segment includes the Health Insurance Marketplace product along with individual, small group and large group commercial health insurance products. The Other segment includes the Company's pharmacy operations, Envolve Benefit Options' vision and dental services, clinical healthcare, behavioral health, international operations and corporate management company, among others. The Company's international businesses, Operose Health Group (Operose Health) and Circle Health Group (Circle Health), which were included in the Other segment, were divested in December 2023 and January 2024, respectively.

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- Definition

The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 275
-Publisher FASB
-URI https://asc.fasb.org/275/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-SubTopic 10
-Topic 275
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-1

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