Affordable Care Act - Additional information (Details) $ in Millions	6 Months Ended
Jun. 30, 2023 USD ($)
Affordable Care Act [Abstract]
Risk adjustment, increase to net receivables	$ 240
Risk adjustment and reinsurance pre-tax benefit	$ (196)

Affordable Care Act, Risk Adjustment And Reinsurance, Pre-Tax Expense (Benefit)

No definition available.

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Namespace Prefix:	cnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration