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Dispositions and Held for Sale (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Feb. 06, 2024
Disposition and Held for Sale [Line Items]
Loss on sale of subsidiary and subsidiaries held for sale	$ (8,310)	$ 0	$ 0
Gains on dispositions and other strategic transactions	3,333	489	$ 588
Equity Method Investments	3,800	$ 1,400
Brazil Disposal Group
Disposition and Held for Sale [Line Items]
Foreign Currency Translation Loss	(4,100)
Loss on sale of subsidiary and subsidiaries held for sale	(7,100)
Total assets				$ 4,924
Businesses Held for Sale
Disposition and Held for Sale [Line Items]
Loss on sale of subsidiary and subsidiaries held for sale	(1,200)
Foreign currency translation loss	(855)
Total assets	894
Dispositions and other Strategic Transactions
Disposition and Held for Sale [Line Items]
Noncash or Part Noncash Divestiture, Amount of Consideration Received	3,000
Equity Method Investments	1,900
Total assets	1,000
Future Repurchase Obligations	3,400
Put and Call Options	630
Dispositions and other Strategic Transactions | Operating Expense
Disposition and Held for Sale [Line Items]
Gains on dispositions and other strategic transactions	3,300
Dispositions and other Strategic Transactions | Optum Health
Disposition and Held for Sale [Line Items]
Gains on dispositions and other strategic transactions	1,400
Dispositions and other Strategic Transactions | UnitedHealthcare
Disposition and Held for Sale [Line Items]
Gains on dispositions and other strategic transactions	1,100
Dispositions and other Strategic Transactions | Optum Insight
Disposition and Held for Sale [Line Items]
Gains on dispositions and other strategic transactions	$ 800

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