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DEBT - Senior Notes - 4.000% (Details) - Senior Notes - Senior Notes – 4.000% - USD ($)
$ in Millions
Mar. 17, 2021
Sep. 30, 2021
Sep. 30, 2020
Debt Instrument [Line Items]      
Proceed from issuance of unsecured debt $ 500.0    
Interest rate (percent) 4.00% 4.00% 4.00%