v3.25.4
Other Assets and Leases - Narrative (Details)
Dec. 31, 2025
Morgan Stanley MUFG Securities Co., Ltd.  
Equity Method Investments  
Voting/ economic interest (as a percent) 40.00%
Morgan Stanley MUFG Securities Co., Ltd. | IS  
Equity Method Investments  
Voting/ economic interest (as a percent) 51.00%
Morgan Stanley MUFG Securities Co., Ltd. | MUFG  
Equity Method Investments  
Voting/ economic interest (as a percent) 60.00%
Mitsubishi UFJ Morgan Stanley Securities Co., Ltd  
Equity Method Investments  
Voting/ economic interest (as a percent) 40.00%