Consolidated Comprehensive Income Statement - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 3,226	$ 2,435	$ 9,805	$ 7,689
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	284	(149)	(31)	(240)
Change in net unrealized gains (losses) on available-for-sale securities	723	(366)	900	125
Pension and other	3	(1)	16	(3)
Change in net debt valuation adjustment	(175)	(414)	(463)	(960)
Net change in cash flow hedges	34	(3)	6	(16)
Total other comprehensive income (loss)	869	(933)	428	(1,094)
Comprehensive income	4,095	1,502	10,233	6,595
Net income applicable to noncontrolling interests	38	27	129	119
Other comprehensive income (loss) applicable to noncontrolling interests	95	(31)	(7)	(145)
Comprehensive income applicable to Morgan Stanley	$ 3,962	$ 1,506	$ 10,111	$ 6,621