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Recent Authoritative Accounting Guidance (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Stockholders' Equity Attributable to Parent | $ 3,073.8 | $ 1,986.6 | $ 1,959.8 | $ 2,013.9
Off-Balance Sheet, Credit Loss, Liability | 16.2 | 3.8 | 3.7 |
Retained Earnings [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Stockholders' Equity Attributable to Parent | $ 1,072.7 | $ 1,052.6 | $ 962.1 | $ 953.6

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