Consolidated Comprehensive Income Statement - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 3,117	$ 2,221	$ 6,579	$ 5,254
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(142)	(111)	(315)	(91)
Change in net unrealized gains (losses) on available-for-sale securities	109	(21)	177	491
Pension and other	9	(1)	13	(2)
Change in net debt valuation adjustment	275	(531)	(288)	(546)
Net change in cash flow hedges	0	(20)	(28)	(13)
Total other comprehensive income (loss)	251	(684)	(441)	(161)
Comprehensive income	3,368	1,537	6,138	5,093
Net income applicable to noncontrolling interests	41	39	91	92
Other comprehensive income (loss) applicable to noncontrolling interests	(46)	(95)	(102)	(114)
Comprehensive income applicable to Morgan Stanley	$ 3,373	$ 1,593	$ 6,149	$ 5,115