Fair Value Measurements - Summary of Financial Assets and Liabilities Carried at Fair Value (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets at fair value	$ 694,838	$ 738,615	$ 715,812
Total assets	$ 1,555,994	$ 1,601,224	$ 1,463,988
Total level 3 financial assets divided by total assets	1.90%	1.80%	1.60%
Total level 3 financial assets divided by total financial assets at fair value	4.20%	3.90%	3.40%
Total financial liabilities at fair value	$ 534,964	$ 578,312	$ 491,557
Total liabilities	$ 1,436,704	$ 1,483,353	$ 1,354,062
Total level 3 financial liabilities divided by total liabilities	1.60%	1.60%	2.20%
Total level 3 financial liabilities divided by total financial liabilities at fair value	4.30%	4.20%	5.90%
Counterparty and cash collateral netting
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets at fair value	$ (77,707)	$ (70,198)	$ (66,041)
Total financial liabilities at fair value	(60,573)	(50,926)	(51,269)
Investments in funds at NAV
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets at fair value	2,971	3,045	3,469
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets at fair value	249,307	249,974	255,774
Total financial liabilities at fair value	137,956	168,941	110,030
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets at fair value	490,992	526,910	498,527
Total financial liabilities at fair value	434,313	435,827	403,627
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets at fair value	29,275	28,884	24,083
Total financial liabilities at fair value	$ 23,268	$ 24,470	$ 29,169