Retirement Benefits - Schedule of Change in Benefit Obligations and Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Benefits
Change in benefit obligation
Benefit obligation at beginning of year	$ 674.9	$ 670.8
Service cost	0.6	0.6	$ 0.9
Interest cost	33.4	35.2	28.0
Plan participants’ contributions	0.0	0.0
Amendments	0.0	0.0
Actuarial loss/(gain)	5.4	18.1
Currency impact	(1.8)	3.2
Other	0.0	(0.1)
Benefits paid	(55.4)	(52.9)
Benefit obligation at end of year	657.1	674.9	670.8
Change in plan assets
Fair value of plan assets at beginning of year	543.1	515.4
Actual return on plan assets	5.2	50.8
Employer contributions	8.2	26.5
Plan participants’ contributions	0.0	0.0
Currency impact	(2.1)	3.3
Benefits paid	(55.4)	(52.9)
Fair value of plan assets at end of year	499.0	543.1	515.4
FUNDED STATUS	(158.1)	(131.8)
Amounts recognized in the consolidated balance sheet consist of:
Prepaid pensions (included in Other long-term assets)	15.5	10.0
Accrued benefit liability (short-term and long-term)	(173.6)	(141.8)
NET AMOUNT RECOGNIZED IN THE CONSOLIDATED BALANCE SHEET	(158.1)	(131.8)
Amounts recognized in Accumulated other comprehensive loss (income) consist of:
Net actuarial loss (gain)	251.6	231.1
Prior service cost (credit)	5.6	6.0
NET AMOUNT RECOGNIZED IN ACCUMULATED OTHER COMPREHENSIVE LOSS	257.2	237.1
Other Benefits
Change in benefit obligation
Benefit obligation at beginning of year	16.1	15.9
Service cost	0.0	0.0	0.0
Interest cost	0.8	0.8	0.5
Plan participants’ contributions	0.0	0.0
Amendments	0.0	0.0
Actuarial loss/(gain)	(1.8)	0.3
Currency impact	0.0	0.0
Other	0.0	0.0
Benefits paid	(0.9)	(0.9)
Benefit obligation at end of year	14.2	16.1	15.9
Change in plan assets
Fair value of plan assets at beginning of year	0.0	0.0
Actual return on plan assets	0.0	0.0
Employer contributions	0.9	0.9
Plan participants’ contributions	0.0	0.0
Currency impact	0.0	0.0
Benefits paid	(0.9)	(0.9)
Fair value of plan assets at end of year	0.0	0.0	$ 0.0
FUNDED STATUS	(14.2)	(16.1)
Amounts recognized in the consolidated balance sheet consist of:
Prepaid pensions (included in Other long-term assets)	0.0	0.0
Accrued benefit liability (short-term and long-term)	(14.2)	(16.1)
NET AMOUNT RECOGNIZED IN THE CONSOLIDATED BALANCE SHEET	(14.2)	(16.1)
Amounts recognized in Accumulated other comprehensive loss (income) consist of:
Net actuarial loss (gain)	(6.1)	(4.7)
Prior service cost (credit)	0.0	0.0
NET AMOUNT RECOGNIZED IN ACCUMULATED OTHER COMPREHENSIVE LOSS	$ (6.1)	$ (4.7)