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v3.23.3

Debt (Schedule of Principal Debt Outstanding) (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Instrument [Line Items] |  |  |
Principal Outstanding |  | $ 4,968.5 | $ 4,616.5
Unamortized Debt Issuance Costs |  | (25.0) | (22.4)
Unamortized Discount |  | 2.7 | 3.4
Carrying Amount |  | 4,940.8 | 4,590.7
Revolving Secured Line of Credit [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal Outstanding | [1] | 102.1 | 30.9
Unamortized Debt Issuance Costs | [1] | 0.0 | 0.0
Unamortized Discount | [1] | 0.0 | 0.0
Carrying Amount | [1] | 102.1 | 30.9
Secured Financings [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal Outstanding | [2] | 4,057.9 | 3,776.7
Unamortized Debt Issuance Costs | [2] | (21.0) | (16.9)
Unamortized Discount | [2] | 2.7 | 3.4
Carrying Amount | [2] | 4,034.2 | 3,756.4
Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal Outstanding |  | 800.0 | 800.0
Unamortized Debt Issuance Costs |  | (4.0) | (5.5)
Unamortized Discount |  | 0.0 | 0.0
Carrying Amount |  | 796.0 | 794.5
Mortgages [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal Outstanding |  | 8.5 | 8.9
Unamortized Debt Issuance Costs |  | 0.0 | 0.0
Unamortized Discount |  | 0.0 | 0.0
Carrying Amount |  | 8.5 | 8.9
Other Assets [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Unamortized Debt Issuance Costs |  | $ (4.6) | $ (3.9)
[1] | Excludes deferred debt issuance cost s of $4.6 million and $3.9 million as of September 30, 2023 and December 31, 2022, respectively, which are included in other assets.
[2] | Warehouse facilities and Term ABS financings.

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