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Segment Financial Information (Narrative) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($) reportableSegments	Dec. 31, 2021 USD ($)
Statement [Line Items]
Number of Reportable Segments | reportableSegments	4
Assets	$ 243,064	$ 212,206
Goodwill	8,393
Optumhealth
Statement [Line Items]
Assets	67,800	60,500
Goodwill	4,500
OptumRx
Statement [Line Items]
Assets	47,200	$ 40,200
Goodwill	$ 3,800

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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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