XML 65 R55.htm IDEA: XBRL DOCUMENT v3.23.1
Investment and Other Income, net - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Other Income and Expenses [Abstract]        
Net gains (losses) recognized on equity securities measured at fair value and trading debt securities $ 13.1 $ (29.2) $ 78.2 $ (34.5)