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Business Combinations (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
	Oct. 03, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Combination, Separately Recognized Transactions [Line Items]
Cash received from dispositions		$ 3,414	$ 15	$ 221
Change Healthcare Claim Editing Business
Business Combination, Separately Recognized Transactions [Line Items]
Cash received from dispositions		2,200
Other Dispositions
Business Combination, Separately Recognized Transactions [Line Items]
Cash received from dispositions		1,200
Carrying Value of Disposition		600
Change Healthcare
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Consideration Transferred	$ 13,900
Other Acquisitions
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Consideration Transferred		$ 8,800

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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