Consolidated Company-Sponsored Investment Funds - Offsetting of Derivative Assets and Liabilities (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Derivative Asset [Abstract]
Net Amounts of Assets Presented in the Statement of Financial Condition	$ 12,985,000	$ 20,941,000
Cash Collateral	(5,500,000)	(10,400,000)
Derivative Liability [Abstract]
Net Amounts of Liabilities Presented in the Statement of Financial Condition	17,615,000	14,944,000
Cash Collateral Pledged	(10,300,000)	(5,200,000)
VIEs
Derivative Asset [Abstract]
Gross Amounts of Recognized Assets	20,077,000	101,000
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	20,077,000	101,000
Financial Instruments	0	0
Cash Collateral	0	(2,000)
Derivative Asset, Fair Value, Amount Offset Against Collateral	20,077,000	99,000
Derivative Liability [Abstract]
Gross Amounts of Recognized Liabilities	20,084,000	85,000
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	20,084,000	85,000
Financial Instruments	0	0
Cash Collateral Pledged	(492,000)	(85,000)
Net Amount	19,592,000	0
VOEs
Derivative Asset [Abstract]
Gross Amounts of Recognized Assets		11,483,000
Gross Amounts Offset in the Statement of Financial Condition		0
Net Amounts of Assets Presented in the Statement of Financial Condition		11,483,000
Financial Instruments		0
Cash Collateral	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral		11,483,000
Derivative Liability [Abstract]
Cash Collateral Pledged	$ 0	$ 0