XML 51 R40.htm IDEA: XBRL DOCUMENT v3.24.2.u1
Investments Equity Securities (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Schedule of Equity Securities and Other [Line Items]    
Equity Securities, FV-NI, Cost $ 134.4 $ 125.9
Equity Securities, FV-NI 232.6 211.2
Industrial and Miscellaneous [Member]    
Schedule of Equity Securities and Other [Line Items]    
Equity Securities, FV-NI, Cost 111.5 104.4
Equity Securities, FV-NI 202.5 181.7
Other [Member]    
Schedule of Equity Securities and Other [Line Items]    
Equity Securities, FV-NI, Cost 22.9 21.5
Equity Securities, FV-NI $ 30.1 $ 29.5