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Business Combinations (Narrative) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($)
Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]
Business Combination, Consideration Transferred	$ 4,700
Business Acquisition [Line Items]
Goodwill	3,705
Optum Health
Business Acquisition [Line Items]
Goodwill	$ 3,400

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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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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