Deferred Compensation Plans and Carried Interest Compensation - PSU Fair Value on Award Date (Details) - PSUs - $ / shares	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
MS Adjusted ROTCE/ROE
Share-based Payment Awards
Fair value per PSU on award date (in dollars per share)	$ 74.87	$ 57.05	$ 43.29
Relative MS TSR
Share-based Payment Awards
Fair value per PSU on award date (in dollars per share)	$ 83.70	$ 65.31	$ 48.28

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration