Unsecured Borrowings - Unsecured Long-Term Borrowings (Detail) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 315,426	$ 285,500
Unsecured long-term borrowings at fair value	125,666	112,683
Unsecured long-term borrowings for which the firm did not elect the fair value option	189,760	172,820
Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Unsecured long-term borrowings	191,140	$ 177,670
Unsecured Debt
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 315,426
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	3.94%	3.92%
U.S. Dollar
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 230,070	$ 212,561
U.S. Dollar \| Minimum \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	1.54%	1.43%
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	4.39%	4.32%
Non-U.S. Dollar
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 85,356	$ 72,939
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	2.37%	2.22%

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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