Segment Reporting - Reconciliation of Consolidated Operating Income to Adjusted Operating Income (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting, Other Significant Reconciling Item [Line Items]
Operating income (loss) (GAAP measure)			$ (3,931)	$ 3,061	$ 4,128	$ 10,964
Amortization of intangible assets			464	561	1,398	1,730
Opioid litigation charges			5,220	0	5,704	0
Loss on assets held for sale			2,480	0	2,521	0
Gain on sale of subsidiary			0	0	(225)	0
Acquisition-related integration costs			0	20	0	101
Goodwill impairment			0	431	0	431
Acquisition purchase price adjustment outside of measurement period		$ (61)	0	0	0	(61)
Adjusted operating income			$ 4,233	$ 4,073	13,526	$ 13,165
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Payflex \| Health Care Benefits
Segment Reporting, Other Significant Reconciling Item [Line Items]
Gain on sale of subsidiary					$ (225)
Proceeds from divestiture of subsidiary	$ 775

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Business Combination, Purchase Price Adjustment, Outside of Measurement Period

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Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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