Collateralized Agreements and Financings - Offsetting Arrangements (Detail) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Collateralized Agreements And Financings [Abstract]
Resale agreements, Gross carrying value	$ 379,024	$ 313,924
Resale agreements, Counterparty Netting	(249,238)	(133,862)
Resale agreements	129,786	180,062
Resale agreements, Amounts not offset	(126,443)	(176,390)
Resale agreements	3,343	3,672
Securities borrowed, Gross carrying value	236,515	205,259
Securities borrowed, Counterparty Netting	(18,807)	(10,614)
Securities borrowed	217,708	194,645
Securities borrowed, Amounts not offset	(210,450)	(187,474)
Securities borrowed	7,258	7,171
Repurchase agreements, Gross carrying value	467,035	408,242
Repurchase agreements, Counterparty Netting	(249,238)	(133,862)
Repurchase agreements	217,797	274,380
Repurchase agreements, Amounts not offset	(215,016)	(270,150)
Repurchase agreements	2,781	4,230
Securities loaned, Gross carrying value	76,416	66,674
Securities loaned, Counterparty Netting	(18,807)	(10,614)
Securities loaned	57,609	56,060
Securities loaned, Amounts not offset	(57,400)	(55,910)
Securities loaned	$ 209	$ 150

Collateralized agreements and financings.

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