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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Statement of Comprehensive Income [Abstract]    
Net income $ 752.4 $ 588.2
Change in unrealized gains on marketable securities:    
Unrealized gains arising during the period, net of tax 21.3 37.8
Gains reclassified into earnings, net of tax 0.1 [1]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Total 21.4 37.8
Change in unrealized gains (losses) on cash flow hedges:    
Unrealized gains (losses) arising during the period, net of tax 36.8 (3.1)
Gains (losses) reclassified into earnings, net of tax (15.2) 3.3
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Total 21.6 0.2
Other comprehensive income, net of tax 43.0 38.0
Comprehensive income $ 795.4 $ 626.2
[1] Represents an amount lower than $0.1