Postretirement Benefit Plans - Net Periodic Postretirement Cost Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1.1	$ 1.1
Interest cost	5.6	6.1
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.8	0.8	$ 1.2
Interest cost	2.7	3.0	1.3
Defined Benefit Plan, Amortization of Gain (Loss)	0.3	0.0	1.3
Amortization of prior service cost	0.0	0.0	0.0
Net periodic postretirement cost	3.8	3.8	3.8
Settlement charge and other	(0.2)	0.1	0.0
Cost for special termination benefit	0.1	0.0	0.0
Total net periodic postretirement cost	3.7	3.9	3.8
Other changes in plan assets and benefit obligations recognized in other comprehensive income
Net actuarial (gain) loss	(5.6)	3.7	(21.3)
Prior service cost	0.5	0.0	0.0
Amortization of net actuarial loss	(0.2)	0.0	(1.3)
Foreign currency translation and other	(0.4)	0.1	(1.7)
Total change recognized in other comprehensive income	(5.7)	3.8	(24.3)
Total impact from net periodic postretirement cost and changes in other comprehensive income	(2.0)	7.7	(20.5)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.3	0.3	0.6
Interest cost	2.9	3.1	2.2
Defined Benefit Plan, Amortization of Gain (Loss)	0.2	0.0	1.8
Amortization of prior service cost	(5.8)	(6.0)	(5.5)
Net periodic postretirement cost	(2.4)	(2.6)	(0.9)
Gain due to settlement/divestiture	(1.2)	0.0	0.0
Total net periodic postretirement cost	(3.6)	(2.6)	(0.9)
Other changes in plan assets and benefit obligations recognized in other comprehensive income
Net actuarial (gain) loss	(7.0)	(2.9)	(23.3)
Prior service cost	0.0	0.0	(8.1)	[1]
Amortization of net actuarial loss	(0.2)	0.0	(1.8)
Amortization of prior service cost	5.8	6.0	5.5
Recognized actuarial gain (loss) due to divestiture	0.7	0.0	0.0
Total change recognized in other comprehensive income	(0.7)	3.1	(27.7)
Total impact from net periodic postretirement cost and changes in other comprehensive income	(4.3)	0.5	(28.6)
United States | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.0	0.0	0.0
Interest cost	0.5	0.6	0.3
Defined Benefit Plan, Amortization of Gain (Loss)	0.1	0.0	0.2
Amortization of prior service cost	0.0	0.0	0.0
Net periodic postretirement cost	0.6	0.6	0.5
Settlement charge and other	0.0	0.0	0.0
Cost for special termination benefit	0.0	0.0	0.0
Total net periodic postretirement cost	0.6	0.6	0.5
Other changes in plan assets and benefit obligations recognized in other comprehensive income
Net actuarial (gain) loss	(0.4)	0.3	(3.0)
Prior service cost	0.0	0.0	0.0
Amortization of net actuarial loss	(0.1)	0.0	(0.2)
Foreign currency translation and other	0.0	0.0	0.0
Total change recognized in other comprehensive income	(0.5)	0.3	(3.2)
Total impact from net periodic postretirement cost and changes in other comprehensive income	0.1	0.9	(2.7)
International Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.8	0.8	1.2
Interest cost	2.2	2.4	1.0
Defined Benefit Plan, Amortization of Gain (Loss)	0.2	0.0	1.1
Amortization of prior service cost	0.0	0.0	0.0
Net periodic postretirement cost	3.2	3.2	3.3
Settlement charge and other	(0.2)	0.1	0.0
Cost for special termination benefit	0.1	0.0	0.0
Total net periodic postretirement cost	3.1	3.3	3.3
Other changes in plan assets and benefit obligations recognized in other comprehensive income
Net actuarial (gain) loss	(5.2)	3.4	(18.3)
Prior service cost	0.5	0.0	0.0
Amortization of net actuarial loss	(0.1)	0.0	(1.1)
Foreign currency translation and other	(0.4)	0.1	(1.7)
Total change recognized in other comprehensive income	(5.2)	3.5	(21.1)
Total impact from net periodic postretirement cost and changes in other comprehensive income	$ (2.1)	$ 6.8	$ (17.8)

[1] A prior service benefit was recognized in 2022 related to changes to a postretirement medical plan, covering certain unionized employees and retirees within our IP business. The changes closed the plan to new hires and, beginning in 2023, plan participants receive a fixed contribution into a Health Reimbursement account.