Consolidated Statement of Changes in Total Equity - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings		Employee Stock Trusts	Accumulated Other Comprehensive Income (Loss)	Common Stock Held in Treasury at Cost	Common Stock Issued to Employee Stock Trusts	Noncontrolling Interests
Beginning balance at Dec. 31, 2020		$ 9,250	$ 20	$ 25,546	$ 78,694		$ 3,043	$ (1,962)	$ (9,767)	$ (3,043)	$ 1,368
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of preferred stock		(1,500)
Share-based award activity				292			725		1,037	(725)
Issuance of common stock for the acquisition of Eaton Vance				2,185					3,132
Other net increases (decreases)				7	(7)						(65)
Net income applicable to Morgan Stanley	$ 7,631				7,631
Preferred stock dividends	(241)				(241)	[1]
Common stock dividends	(1,286)				(1,286)	[1]
Net change in Accumulated other comprehensive income (loss)	(621)							(561)			(60)
Repurchases of common stock and employee tax withholdings									(5,600)
Net income applicable to noncontrolling interests	49										49
Ending balance at Jun. 30, 2021	108,162	7,750	20	28,030	84,791		3,768	(2,523)	(11,198)	(3,768)	1,292
Beginning balance at Mar. 31, 2021		7,750	20	27,406	82,034		3,861	(2,754)	(8,197)	(3,861)	1,329
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of preferred stock		0
Share-based award activity				624			(93)		17	93
Issuance of common stock for the acquisition of Eaton Vance				0					0
Other net increases (decreases)				0	0						(39)
Net income applicable to Morgan Stanley	3,511				3,511
Preferred stock dividends	(103)				(103)	[1]
Common stock dividends	(651)				(651)	[1]
Net change in Accumulated other comprehensive income (loss)	232							231			1
Repurchases of common stock and employee tax withholdings									(3,018)
Net income applicable to noncontrolling interests	1										1
Ending balance at Jun. 30, 2021	108,162	7,750	20	28,030	84,791		3,768	(2,523)	(11,198)	(3,768)	1,292
Beginning balance at Dec. 31, 2021	106,598	7,750	20	28,841	89,432		3,955	(3,102)	(17,500)	(3,955)	1,157
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of preferred stock		0
Share-based award activity				(448)			945		1,582	(945)
Issuance of common stock for the acquisition of Eaton Vance				0					0
Other net increases (decreases)				1	(3)						(56)
Net income applicable to Morgan Stanley	6,161				6,161
Preferred stock dividends	(228)				(228)	[1]
Common stock dividends	(2,473)				(2,473)	[1]
Net change in Accumulated other comprehensive income (loss)	(2,044)							(1,919)			(125)
Repurchases of common stock and employee tax withholdings									(6,518)
Net income applicable to noncontrolling interests	90										90
Ending balance at Jun. 30, 2022	102,662	7,750	20	28,394	92,889		4,900	(5,021)	(22,436)	(4,900)	1,066
Beginning balance at Mar. 31, 2022		7,750	20	28,007	91,722		4,975	(4,902)	(19,696)	(4,975)	1,174
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Redemption of preferred stock		0
Share-based award activity				386			(75)		97	75
Issuance of common stock for the acquisition of Eaton Vance				0					0
Other net increases (decreases)				1	(3)						(59)
Net income applicable to Morgan Stanley	2,495				2,495
Preferred stock dividends	(104)				(104)	[1]
Common stock dividends	(1,221)				(1,221)	[1]
Net change in Accumulated other comprehensive income (loss)	(209)							(119)			(90)
Repurchases of common stock and employee tax withholdings									(2,837)
Net income applicable to noncontrolling interests	41										41
Ending balance at Jun. 30, 2022	$ 102,662	$ 7,750	$ 20	$ 28,394	$ 92,889		$ 4,900	$ (5,021)	$ (22,436)	$ (4,900)	$ 1,066

[1] See Note 16 for information regarding dividends per share for each class of stock.