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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Statement of Comprehensive Income [Abstract]        
Unrealized (loss) gain arising during the period, net of tax benefit (provision) $ (4.6) $ 4.7 $ 1.5 $ 8.5
Tax provision of reclassification adjustment 2.3 2.1 7.0 5.8
Tax provision related to the reclassification of cash flow items $ 0.0 $ 0.0 $ 0.1 $ 1.0