v3.26.3
Business Segment Information - Additional Information (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
segment
distributionChannel
Sep. 30, 2025
Segment Reporting [Abstract]        
Number of operating segments | segment     1  
Number of reportable segments not disclosed     one  
Number of distribution channels | distributionChannel     3  
Revenue Benchmark | Product Concentration Risk | Japan | Location, Statement of Income, Balance [Axis]: us-gaap:RevenuesNetOfInterestExpense        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]        
Concentration risk 10.00% 13.00% 10.00% 12.00%