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Medical Claims Liability - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Insurance [Abstract]
Amounts recorded as an adjustment to premium revenues related to minimum MLR and return of premium programs	$ 243	$ 382	$ 198
Segment Reporting Information [Line Items]
Premium deficiency reserve liability	(158)	250
Medicare
Segment Reporting Information [Line Items]
Premium deficiency reserve liability	$ (158)	$ 250

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- Definition

Amounts Recorded As An Adjustment To Premium Revenues Related To Minimum MLR And Return Of Premium Programs

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No definition available.

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- Definition

Premium Deficiency Reserve Liability

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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