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Financing Agreement - Summary of Activity Under Credit Arrangements, Excluding Acquired Borrowings (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Debt Disclosure [Abstract] |  |  |
Total borrowings as of December 31 | $ 1,990.9 | $ 1,726.0 | $ 1,365.0
Average outstanding borrowings during year | 2,074.9 | 1,500.4 | 1,879.7
Maximum outstanding borrowings during year | $ 2,300.0 | $ 1,903.0 | $ 2,370.6
Weighted-average interest rate as of December 31 | 5.33% | 1.77% | 2.30%

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