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Segments - Schedule of Operating Segment Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 34,072	$ 31,974	$ 27,771
Medicaid
Segment Reporting Information [Line Items]
Revenues	27,707	25,783	21,231
Medicare
Segment Reporting Information [Line Items]
Revenues	4,227	3,824	3,379
Marketplace
Segment Reporting Information [Line Items]
Revenues	2,062	2,296	3,091
Other
Segment Reporting Information [Line Items]
Revenues	$ 76	$ 71	$ 70

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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