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Statutory Capital Requirements and Dividend Restrictions	12 Months Ended
	Dec. 31, 2018
Statutory Capital Requirements And Dividend Restrictions [Abstract]
Statutory Capital Requirements and Dividend Restriction	Statutory Capital Requirements and Dividend Restrictions Various state laws require Centene's regulated subsidiaries to maintain minimum capital levels specified by each state and restrict the amount of dividends that may be paid without prior regulatory approval. At December 31, 2018 and 2017, Centene's subsidiaries had aggregate statutory capital and surplus of $7,259 million and $5,153 million, respectively, compared with the required minimum aggregate statutory capital and surplus of $3,279 million and $2,251 million, respectively. As of December 31, 2018, the amount of capital and surplus or net worth that was unavailable for the payment of dividends or return of capital to the Company was $3,279 million in the aggregate.