Income Taxes (Income Tax Provision (benefit) and Effective Tax Rate) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$ (205.5)	$ 41.6	$ (203.5)	$ 110.7
Effective tax rate, percent	(211.20%)	(12.30%)	(212.20%)	(95.40%)