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Credit Facility (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Line of Credit Facility [Line Items]          
Long-term Line of Credit, Noncurrent, Net of Debt Issuance Costs $ 1,591.4   $ 1,591.4   $ 1,213.8
Line of Credit Facility, Maximum Borrowing Capacity 52.9   52.9    
Letters of Credit Outstanding, Amount 0.4   0.4    
Uncommitted Facility, Maximum Borrowing Capacity 400.0   400.0    
Line of Credit [Member]          
Line of Credit Facility [Line Items]          
Unamortized Debt Issuance Expense 8.6   8.6   11.2
Long-term Line of Credit, Noncurrent, Net of Debt Issuance Costs 1,591.4   1,591.4   $ 1,213.8
Line of Credit Facility, Maximum Borrowing Capacity 3,350.0   3,350.0    
Line of Credit Facility, Average Outstanding Amount $ 2,011.9 $ 1,599.8 $ 2,017.0 $ 1,295.9  
Pricing on the Facility based on market rates     ("SOFR") plus 0.875% to 1.35%    
Description of Variable Rate Basis     SOFR    
Basis spread on variable rate (in hundredths)     0.98%    
Line of Credit Facility, Interest Rate During Period 6.10% 3.20% 5.80% 2.20%