Unsecured Borrowings - Unsecured Long-Term Borrowings (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 347,963	$ 285,500
Unsecured long-term borrowings at fair value	144,703	112,683
Unsecured long-term borrowings for which the firm did not elect the fair value option	203,260	172,820
Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Unsecured long-term borrowings	206,200	$ 177,670
Unsecured Debt
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 347,963
Minimum \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	0.25%	0.25%
Maximum \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	7.99%	7.25%
Weighted Average \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	4.07%	3.92%
U.S. Dollar
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 253,566	$ 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	4.49%	4.32%
Non-U.S. Dollar
Debt Instrument [Line Items]
Unsecured long-term borrowings	$ 94,397	$ 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	7.99%	7.25%
Non-U.S. Dollar \| Weighted Average \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	2.63%	2.22%

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

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