Postretirement Benefit Plans - Net Periodic Postretirement Cost Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Service cost	$ 1.1	$ 1.8
Interest cost	6.1	3.5
Pension Plan [Member]
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Net actuarial (gain) loss	3.7	(21.3)	$ (6.4)
Amortization of net actuarial loss	0.0	(1.3)	(1.8)
Foreign currency translation and other	0.1	(1.7)	(2.7)
Total change recognized in other comprehensive income	3.8	(24.3)	(10.9)
Total impact from net periodic postretirement cost and changes in other comprehensive income	7.7	(20.5)	(10.1)
Service cost	0.8	1.2	1.4
Interest cost	3.0	1.3	1.0
Defined Benefit Plan, Amortization of Gain (Loss)	0.0	1.3	1.8
Net periodic postretirement cost	3.8	3.8	4.2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	0.1	0.0	(3.4)	[1]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	3.9	3.8	0.8
Other Postretirement Benefits Plan [Member]
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Net actuarial (gain) loss	(2.9)	(23.3)	(8.2)
Prior service cost	0.0	(8.1)	0.0
Amortization of net actuarial loss	0.0	(1.8)	(2.6)
Amortization of prior service cost	6.0	5.5	5.1
Total change recognized in other comprehensive income	3.1	(27.7)	(5.7)
Total impact from net periodic postretirement cost and changes in other comprehensive income	0.5	(28.6)	(5.7)
Service cost	0.3	0.6	0.7
Interest cost	3.1	2.2	1.8
Defined Benefit Plan, Amortization of Gain (Loss)	0.0	1.8	2.6
Amortization of prior service cost	(6.0)	(5.5)	(5.1)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(2.6)	(0.9)	0.0
International Plan [Member] | Pension Plan [Member]
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Net actuarial (gain) loss	3.4	(18.3)	(6.3)
Amortization of net actuarial loss	0.0	(1.1)	(1.6)
Foreign currency translation and other	0.1	(1.7)	(2.7)
Total change recognized in other comprehensive income	3.5	(21.1)	(10.6)
Total impact from net periodic postretirement cost and changes in other comprehensive income	6.8	(17.8)	(6.9)
Service cost	0.8	1.2	1.4
Interest cost	2.4	1.0	0.7
Defined Benefit Plan, Amortization of Gain (Loss)	0.0	1.1	1.6
Net periodic postretirement cost	3.2	3.3	3.7
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	0.1	0.0	0.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	3.3	3.3	3.7
United States | Pension Plan [Member]
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Net actuarial (gain) loss	0.3	(3.0)	(0.1)
Amortization of net actuarial loss	0.0	(0.2)	(0.2)
Foreign currency translation and other	0.0	0.0	0.0
Total change recognized in other comprehensive income	0.3	(3.2)	(0.3)
Total impact from net periodic postretirement cost and changes in other comprehensive income	0.9	(2.7)	(3.2)
Service cost	0.0	0.0	0.0
Interest cost	0.6	0.3	0.3
Defined Benefit Plan, Amortization of Gain (Loss)	0.0	0.2	0.2
Net periodic postretirement cost	0.6	0.5	0.5
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	0.0	0.0	(3.4)	[1]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 0.6	$ 0.5	$ (2.9)

[1] 2021 includes income of $3.4 from a pricing adjustment associated with the 2020 termination and sale of the U.S. qualified pension plan.