Segment Reporting - Reconciliation of Consolidated Operating Income to Adjusted Operating Income (Details) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
Jun. 01, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting [Abstract]
Operating income (GAAP measure)		$ 3,234	$ 4,669	$ 6,680	$ 8,214
Amortization of intangible assets		485	460	887	922
Net realized capital losses		98	98	203	173
Acquisition-related integration costs		157	0	200	0
Restructuring charge		496	0	496	0
Office real estate optimization charges		11	0	36	0
Loss on assets held for sale		0	0	349	41
Gain on sale of subsidiary		0	(225)	0	(225)
Opioid litigation charge		0	0	0	484
Adjusted operating income		$ 4,481	$ 5,002	$ 8,851	$ 9,609
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Payflex \| Health Care Benefits
Segment Reporting, Other Significant Reconciling Item [Line Items]
Proceeds from divestiture of subsidiary	$ 775

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Office Real Estate Optimization Charges - Related to the abandonment of leased real estate and the related right-of-use assets and property and equipment

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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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Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.

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The net result for the period of deducting operating expenses from operating revenues.

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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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Amount of realized gain (loss) on investment.

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