Other Liabilities - Other Liabilities by Type (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Compensation and benefits	$ 3,281	$ 6,889
Income tax-related liabilities	3,172	2,947
Operating lease liabilities	2,289	2,385
Noncontrolling interests	1,122	1,713
Employee interests in consolidated funds	71	81
Accrued expenses and other	8,359	7,636
Total	$ 18,294	$ 21,651