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Organization, Basis of Presentation and Significant Accounting Policies - Schedule of Change in Presentation Within Consolidated Statements of Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Cash flows from operating activities
Settlement activity, net		$ 0.0
All other operating activities		369.3
Net cash provided by operating activities	$ 410.3	369.3
Cash flows from financing activities
Settlement activity, net	(58.0)	(14.4)
All other financing activities		950.6
Net cash provided by financing activities	$ 2,591.2	936.2
As Previously Reported
Cash flows from operating activities
Settlement activity, net		(14.4)
All other operating activities		369.3
Net cash provided by operating activities		354.9
Cash flows from financing activities
Settlement activity, net		0.0
All other financing activities		950.6
Net cash provided by financing activities		950.6
Adjustment
Cash flows from operating activities
Settlement activity, net		14.4
All other operating activities		0.0
Net cash provided by operating activities		14.4
Cash flows from financing activities
Settlement activity, net		(14.4)
All other financing activities		0.0
Net cash provided by financing activities		$ (14.4)

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