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Segment Financial Information (Narrative) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($) reportableSegments	Dec. 31, 2022 USD ($)
Statement [Line Items]
Number of Reportable Segments | reportableSegments	4
Assets	$ 282,063	$ 245,705
Goodwill	8,073
Optum Health
Statement [Line Items]
Assets	86,900	$ 69,000
Goodwill	$ 7,300

X

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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