v3.24.1.u1
Consolidated Investment Products - Schedule of Balances of CIPs (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Sep. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Assets [Abstract]            
Receivables $ 1,449.6   $ 1,348.4      
Investments, at fair value 899.7   872.8      
Total Assets 32,907.7   30,121.2      
Liabilities [Abstract]            
Accounts payable and accrued expenses 573.7   530.0      
Debt 3,041.0   3,052.8      
Other liabilities 1,414.8   1,286.2      
Total liabilities 18,072.1   16,547.3      
Redeemable Noncontrolling Interests 1,253.9   1,026.1      
Stockholders' Equity [Abstract]            
Franklin Resources, Inc.’s interests 12,861.1   11,916.9      
Nonredeemable noncontrolling interests 720.6   630.9      
Total stockholders’ equity 13,581.7 $ 12,637.6 12,547.8 $ 12,442.6 $ 12,555.5 $ 12,298.9
Total Liabilities, Redeemable Noncontrolling Interests and Stockholders’ Equity 32,907.7   30,121.2      
CIPs [Member]            
Assets [Abstract]            
Cash and cash equivalents 824.1   716.0      
Receivables 185.6   166.7      
Investments, at fair value 11,149.1   9,637.2      
Total Assets 12,158.8   10,519.9      
Liabilities [Abstract]            
Accounts payable and accrued expenses 744.4   349.7      
Debt 9,131.0   8,231.8      
Other liabilities 49.2   25.1      
Total liabilities 9,924.6   8,606.6      
Redeemable Noncontrolling Interests 643.5 $ 555.3 580.1 $ 445.6 $ 1,379.7 $ 942.2
Stockholders' Equity [Abstract]            
Franklin Resources, Inc.’s interests 1,255.5   1,033.9      
Nonredeemable noncontrolling interests 335.2   299.3      
Total stockholders’ equity 1,590.7   1,333.2      
Total Liabilities, Redeemable Noncontrolling Interests and Stockholders’ Equity $ 12,158.8   $ 10,519.9