Accumulated Other Comprehensive Income (Loss) - Changes in Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Abstract]
Foreign currency translation adjustment, pre-tax amount	$ 38.5	$ (49.9)	$ (6.1)
Foreign currency translation adjustment, tax (expense) benefit	0.0	0.0	0.0
Foreign currency translation adjustments, net-of-tax amount	38.5	(49.9)	(6.1)
Pension plans:
Net actuarial gains (losses) and prior service costs arising during the period, pre-tax amount	10.8	39.5	5.1
Net actuarial gains (losses) and prior service costs arising during the period, tax (expense) benefit	(2.9)	(9.7)	(1.4)
Net actuarial gains (losses) and prior service costs arising during the period, net-of-tax amount	7.9	29.8	3.7
Amortization of net actuarial (gains) losses and prior service costs, pre-tax amount	0.7	1.1	2.5
Amortization of net actuarial (gains) losses and prior service costs, tax (expense) benefit	(0.2)	(0.3)	(0.6)
Amortization of net actuarial (gains) losses and prior service costs, net-of-tax amount	0.5	0.8	1.9
Unrealized gains (losses) on cash flow hedges, pre-tax amount	(0.5)	0.4	(4.5)
Unrealized gains (losses) on cash flow hedges, tax (expense) benefit	0.1	(0.1)	1.2
Unrealized gains (losses) on cash flow hedges, net-of-tax amount	(0.4)	0.3	(3.3)
Total other comprehensive income (loss), pre-tax amount	49.5	(8.9)	(3.0)
Total other comprehensive income (loss), tax	(3.0)	(10.1)	(0.8)
Total other comprehensive income (loss), net of tax	$ 46.5	$ (19.0)	$ (3.8)