Other Liabilities - Other Liabilities by Type (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Compensation and benefits	$ 7,233	$ 6,889
Income tax-related liabilities	3,111	2,947
Operating lease liabilities	2,268	2,385
Noncontrolling interests	1,668	1,713
Employee interests in consolidated funds	53	81
Accrued expenses and other	8,832	7,636
Total	$ 23,165	$ 21,651