Fair Value Measurements - Summary of Financial Assets and Liabilities Carried at Fair Value (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets at fair value	$ 650,966	$ 715,812
Total assets	$ 1,441,799	$ 1,463,988
Total level 3 financial assets divided by total assets	1.80%	1.60%
Total level 3 financial assets divided by total financial assets at fair value	4.00%	3.40%
Total financial liabilities at fair value	$ 447,584	$ 491,557
Total liabilities	$ 1,324,610	$ 1,354,062
Total level 3 financial liabilities divided by total liabilities	1.70%	2.20%
Total level 3 financial liabilities divided by total financial liabilities at fair value	5.10%	5.90%
Counterparty and cash collateral netting
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets at fair value	$ (57,855)	$ (66,041)
Total financial liabilities at fair value	(47,884)	(51,269)
Investments in funds at NAV
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets at fair value	2,941	3,469
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets at fair value	194,698	255,774
Total financial liabilities at fair value	119,578	110,030
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets at fair value	485,134	498,527
Total financial liabilities at fair value	353,060	403,627
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets at fair value	26,048	24,083
Total financial liabilities at fair value	$ 22,830	$ 29,169