XML 72 R56.htm IDEA: XBRL DOCUMENT v3.24.0.1
Business Combinations - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Feb. 28, 2023
Dec. 31, 2023
AMP Capital Investors International Holdings Limited    
Business Acquisition [Line Items]    
Acquisition price $ 314.3  
Investment Management Contracts    
Business Acquisition [Line Items]    
Discount rate for projected net cash flow (as a percent)   8.00%
Investor relationships    
Business Acquisition [Line Items]    
Useful life (in years)   12 years
Discount rate for projected net cash flow (as a percent)   14.00%
Minimum | Investment Management Contracts    
Business Acquisition [Line Items]    
Useful life (in years)   1 year
Maximum | Investment Management Contracts    
Business Acquisition [Line Items]    
Useful life (in years)   4 years