Segment Reporting - Reconciliation of Consolidated Operating Income to Adjusted Operating Income (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting [Abstract]
Operating income (GAAP measure)	$ 3,045	$ 3,234	$ 5,316	$ 6,680
Amortization of intangible assets	507	485	1,015	887
Net realized capital losses	90	98	108	203
Acquisition-related transaction and integration costs	102	157	162	200
Opioid litigation charges	0	0	100	0
Restructuring charge	0	496	0	496
Office real estate optimization charges	0	11	0	36
Loss on assets held for sale	0	0	0	349
Adjusted operating income	$ 3,744	$ 4,481	$ 6,701	$ 8,851

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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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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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

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The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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

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Amount of realized gain (loss) on investment.

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Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

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