Comprehensive Income (Changes in AOCI) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Changes in AOCI by component (net of tax) [Roll Forward]
Beginning balance	$ (93.7)
Ending balance	(48.5)	$ (93.7)
Total stockholders' equity	1,163.1	962.1	$ 393.0	$ (203.1)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Changes in AOCI by component (net of tax) [Roll Forward]
Other comprehensive income (loss) before reclassifications	35.5	(0.2)
Amounts reclassified from AOCL	(16.1)	0.7
Net other comprehensive income (loss)	19.4	0.5
Total stockholders' equity	17.9	(1.5)	(2.0)
AOCI, Equity Method Investment, Parent
Changes in AOCI by component (net of tax) [Roll Forward]
Other comprehensive income (loss) before reclassifications	(0.2)	(0.2)
Amounts reclassified from AOCL	0.0	0.0
Net other comprehensive income (loss)	(0.2)	(0.2)
Total stockholders' equity	0.2	0.4	0.6
Defined Benefit Plan Items [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Other comprehensive income (loss) before reclassifications	(2.5)	(2.9)
Amounts reclassified from AOCL	1.4	1.4
Net other comprehensive income (loss)	(1.1)	(1.5)
Total stockholders' equity	(46.8)	(45.7)	(44.2)
Foreign Currency Translation Adjustments [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Other comprehensive income (loss) before reclassifications	28.4	(35.6)
Amounts reclassified from AOCL	(1.3)	0.0
Net other comprehensive income (loss)	27.1	(35.6)
Total stockholders' equity	(19.8)	(46.9)	(11.3)
Accumulated Other Comprehensive Income (Loss) [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Other comprehensive income (loss) before reclassifications	61.2	(38.9)
Amounts reclassified from AOCL	(16.0)	2.1
Net other comprehensive income (loss)	45.2	(36.8)
Total stockholders' equity	$ (48.5)	$ (93.7)	$ (56.9)	$ (90.6)