Unsecured Borrowings - Unsecured Long-Term Borrowings (Detail) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 285,500	$ 242,634
Unsecured long-term borrowings at fair value	112,683	89,189
Unsecured long-term borrowings for which the firm did not elect the fair value option	172,820	153,440
Group Inc.
Debt Instrument [Line Items]
Unsecured long-term borrowings	189,569	167,523
Subsidiaries
Debt Instrument [Line Items]
Unsecured long-term borrowings	95,931	75,111
Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Unsecured long-term borrowings	177,670	$ 156,310
Unsecured Debt
Debt Instrument [Line Items]
Unsecured long-term borrowings	285,500
Unsecured Debt \| Group Inc.
Debt Instrument [Line Items]
Unsecured long-term borrowings	189,569
Unsecured Debt \| Subsidiaries
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 95,931
Minimum \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	0.25%	0.25%
Maximum \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	7.25%	7.25%
Weighted Average \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	3.92%	3.76%
U.S. Dollar
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 212,561	$ 183,841
U.S. Dollar \| Group Inc.
Debt Instrument [Line Items]
Unsecured long-term borrowings	151,533	134,094
U.S. Dollar \| Subsidiaries
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 61,028	$ 49,747
U.S. Dollar \| Minimum \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	1.43%	0.86%
U.S. Dollar \| Maximum \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	6.75%	6.75%
U.S. Dollar \| Weighted Average \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	4.32%	4.10%
Non-U.S. Dollar
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 72,939	$ 58,793
Non-U.S. Dollar \| Group Inc.
Debt Instrument [Line Items]
Unsecured long-term borrowings	38,036	33,429
Non-U.S. Dollar \| Subsidiaries
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 34,903	$ 25,364
Non-U.S. Dollar \| Minimum \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	0.25%	0.25%
Non-U.S. Dollar \| Maximum \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	7.25%	7.25%
Non-U.S. Dollar \| Weighted Average \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	2.22%	2.04%

Unsecured long-term borrowings for which the firm did not elect the fair value option.

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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