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Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Line Items]
Impairment loss		$ (6,723)
Impairment charge			$ 7,311	$ 13	$ 529
Amortization expense			685	$ 692	$ 718
Disposal Group, Held-for-Sale, Not Discontinued Operations | Magellan Health
Goodwill [Line Items]
Impairment loss	$ (513)
Intangible assets, current	$ 140		140
Impairment charge			$ 55

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