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Segment Information - Summary of Reconciliation of Segment Operating Revenues (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	$ 133,974	$ 136,835	$ 133,613
Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	131,748	134,578	126,342
Corporate and other
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	2,479	2,510	7,722
Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating Revenues	$ (253)	$ (253)	$ (451)

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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