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Fair Value Measurements Fair Value of Financial Instrument Assumptions (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Sep. 18, 2024
Feb. 10, 2024
Revolving Credit Facility [Member]      
Fair Value of Financial Instrument Assumptions [Line Items]      
Line of Credit Facility, Current Borrowing Capacity $ 650.0    
Line of Credit Facility, Maximum Borrowing Capacity $ 800.0    
Line of Credit Facility, Initiation Date Jul. 18, 2013    
Basis point spread on variable rate under Credit Facility 1.75%    
JPM Master Repurchase Agreement Initiation Date      
Fair Value of Financial Instrument Assumptions [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity $ 300.0 $ 270.0 $ 240.0
Line of Credit Facility, Initiation Date Oct. 24, 2023