Retirement Benefits - Schedule of Components of Pension and Other Benefit Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 0.5	$ 0.6	$ 0.6
Interest cost	35.2	33.4	35.2
Expected return on plan assets	(28.6)	(30.8)	(28.1)
Amortization of prior service cost	0.4	0.4	0.4
Amortization of actuarial losses (gains)	11.3	9.9	10.4
Curtailment and settlement losses	0.0	0.0	0.0
Net periodic benefit cost	18.8	13.5	18.5
Changes recognized in other comprehensive loss (income), before tax:
Current year net actuarial (gain) loss	(16.7)	31.0	(4.6)
Current year prior service credit	0.0	0.0	0.0
Amortization of prior service (cost)	(0.4)	(0.4)	(0.4)
Amortization of net actuarial (losses) gains	(11.3)	(9.9)	(10.4)
Currency impact	2.6	(0.5)	1.8
Settlement adjustment	0.0	0.0	0.0
Curtailment adjustments	0.0	0.0	0.0
Total recognized in other comprehensive loss	(25.8)	20.2	(13.6)
TOTAL RECOGNIZED IN NET PERIODIC PENSION COST AND OTHER COMPREHENSIVE LOSS	(7.0)	33.7	4.9
Other Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	0.0	0.0	0.0
Interest cost	0.7	0.8	0.8
Expected return on plan assets	0.0	0.0	0.0
Amortization of prior service cost	0.0	0.0	0.0
Amortization of actuarial losses (gains)	(0.6)	(0.4)	(0.5)
Curtailment and settlement losses	0.0	0.0	0.0
Net periodic benefit cost	0.1	0.4	0.3
Changes recognized in other comprehensive loss (income), before tax:
Current year net actuarial (gain) loss	(1.4)	(1.8)	0.3
Current year prior service credit	0.0	0.0	0.0
Amortization of prior service (cost)	0.0	0.0	0.0
Amortization of net actuarial (losses) gains	0.6	0.4	0.6
Currency impact	0.0	0.0	0.0
Settlement adjustment	0.0	0.0	0.0
Curtailment adjustments	0.0	0.0	0.0
Total recognized in other comprehensive loss	(0.8)	(1.4)	0.9
TOTAL RECOGNIZED IN NET PERIODIC PENSION COST AND OTHER COMPREHENSIVE LOSS	$ (0.7)	$ (1.0)	$ 1.2