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Borrowings (Details) - USD ($)
Dec. 31, 2024
Jun. 30, 2024
Debt Instrument [Line Items]    
Borrowings $ 600,000,000 $ 599,000,000
Revolving Credit Agreement    
Debt Instrument [Line Items]    
Limit on revolving credit facility 1,000,000,000.0  
Sub-limit for maximum amount of letters of credit issuable under revolving credit facility 150,000,000  
Borrowings outstanding 0  
Senior Notes | Three Point Zero Five Percentage Due Two Thousand Twenty Five    
Debt Instrument [Line Items]    
Borrowings $ 600,000,000  
Debt instrument interest rate 3.05%