v3.26.1
Fair Value of Financial Instruments (Schedule of Assets and Liabilities, Measured at Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents [1] $ 25.7 $ 22.8
Restricted cash and cash equivalents [1] 525.7 477.9
Debt Securities, Available-for-sale [2] 109.4 106.2
Loans receivable, net [1] 9,002.7 8,974.1
Revolving secured lines of credit [1] 219.6 107.3
Secured financing [1] 5,134.3 5,225.3
Senior notes [1] 1,105.3 1,131.4
Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents [1] 25.7 22.8
Restricted cash and cash equivalents [1] 525.7 477.9
Debt Securities, Available-for-sale [2] 88.4 84.7
Loans receivable, net [1] 0.0 0.0
Secured financing [1] 3,483.2 3,825.1
Senior notes [1] 1,105.3 1,131.4
Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-sale [2] 21.0 21.5
Loans receivable, net [1] 0.0 0.0
Revolving secured lines of credit [1] 219.6 107.3
Secured financing [1] 1,651.1 1,400.2
Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans receivable, net [1] $ 9,002.7 $ 8,974.1
[1] Measured at amortized cost with fair value disclosed.
[2] Measured at fair value on a recurring basis.