Segment Reporting - Reconciliation of Consolidated Operating Income to Adjusted Operating Income (Details) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
Sep. 30, 2024 store	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)
Segment Reporting [Abstract]
Operating income (GAAP measure)		$ 832	$ 3,690	$ 6,148	$ 10,370
Amortization of intangible assets		507	509	1,522	1,396
Net realized capital (gains) losses		(19)	142	89	345
Acquisition-related transaction and integration costs		41	94	203	294
Restructuring charges		1,169	11	1,169	507
Office real estate optimization charges		17	10	17	46
Opioid litigation charges		0	0	100	0
Loss on assets held for sale		0	0	0	349
Adjusted operating income		$ 2,547	$ 4,456	$ 9,248	$ 13,307
Number of estimated store closures \| store	271

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Number Of Stores, Planned Closure

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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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