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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Statement of Comprehensive Income [Abstract]        
Unrealized gain (loss) arising during the period, tax provision $ 1.6 $ 5.0 $ 6.1 $ 2.8
Tax provision of reclassification adjustment 2.3 1.0 4.7 2.8
Tax provision related to the reclassification of cashflow items $ 0.0 $ 0.0 $ 0.1 $ 1.0