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Goodwill and Intangible Assets, Net - Balances of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning balance	$ 1,241	$ 1,115
Acquisitions and measurement period adjustments	430	126
Ending balance	1,671	1,241
Medicaid
Goodwill [Roll Forward]
Beginning balance	994	899
Acquisitions and measurement period adjustments	0	95
Ending balance	994	994
Medicare
Goodwill [Roll Forward]
Beginning balance	203	172
Acquisitions and measurement period adjustments	430	31
Ending balance	633	203
Other
Goodwill [Roll Forward]
Beginning balance	44	44
Acquisitions and measurement period adjustments	0	0
Ending balance	$ 44	$ 44

X

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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X

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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- Definition

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