Pension and Other Postemployment Benefits (Tables)

12 Months Ended

Dec. 31, 2023

Defined Benefit Pension Plans [Member]

Net Periodic Benefit Expense

Net periodic benefit expense:

	Year Ended December 31,
	2023		2022		2021
Service cost	$	2.4	$	2.8	$	5.2
Interest cost	11.1		5.6		4.2
Expected return on plan assets	(0.3)		(1.4)		(1.5)
Amortization of prior service cost	0.3		0.4		0.8
Amortization of actuarial loss	0.7		4.0		9.3
	$	14.2	$	11.4	$	18.0

Weighted Average Assumptions Used to Determine Net Periodic Benefit Expense

Weighted average assumptions:

	Year Ended December 31,
	2023		2022		2021
Discount rate	4.7	%	2.1	%	1.4	%
Compensation increases	2.6	%	2.6	%	2.7	%
Expected return on plan assets	1.5	%	1.6	%	5.0	%

Change in Benefit Obligation, Fair Value of Plan Assets, Funded Status and Balance Sheet Classification of Defined Benefit Pension Plans

Change in benefit obligation and fair value of plan assets:

	December 31,
	2023		2022
Benefit Obligation:
January 1	$	228.6	$	289.4
Service cost	2.4		2.8
Interest cost	11.1		5.6
Amendments, curtailments and settlements	(0.4)		(0.1)
Actuarial (gain) loss	(2.1)		(52.2)
Benefits paid	(12.4)		(10.9)
Foreign currency translation	(2.9)		(6.0)
December 31	$	224.3	$	228.6
Fair Value of Plan Assets:
January 1	$	44.0	$	63.0
Actual return on plan assets	3.9		(14.3)
Employer contributions	8.8		8.2
Benefits paid	(12.4)		(10.9)
Foreign currency translation and other	1.2		(2.0)
December 31	$	45.5	$	44.0

Funded status and balance sheet classification:

	December 31,
	2023		2022
Funded Status	$	(178.8)	$	(184.6)
Other assets	$	2.1	$	2.4
Other current liabilities	(8.6)		(7.5)
Long-term liabilities	(172.3)		(179.5)
	$	(178.8)	$	(184.6)

Plans with Benefit Obligations in Excess of Plan Assets

Plans with benefit obligations in excess of plan assets:

	December 31,
	2023		2022
Benefit obligation	$	(215.5)	$	(221.2)
Plan assets	34.7		34.2
	$	(180.8)	$	(187.0)

Weighted Average Assumptions Used to Determine Benefit Obligation

Weighted average assumptions:

	December 31,
	2023		2022
Discount rate	4.6	%	4.4	%
Compensation increases	3.5	%	3.5	%

Estimated Benefits Expected to be Paid

At December 31, 2023, the estimated benefits expected to be paid over the next 10 years:

2024	$	12.2
2025	17.0
2026	17.1
2027	17.8
2028	22.2
2029 - 2033	89.6

Postemployment Arrangements [Member]

Net Periodic Benefit Expense

Net periodic benefit expense:

	Year Ended December 31,
	2023		2022		2021
Service cost	$	3.4	$	4.5	$	4.8
Interest cost	5.7		2.6		2.1
Amortization of prior service cost	3.8		3.8		4.1
Amortization of actuarial loss	—		2.5		3.9
Total Net Periodic Benefit Expense	$	12.9	$	13.4	$	14.9

Weighted Average Assumptions Used to Determine Net Periodic Benefit Expense

Weighted average assumptions:

	Year Ended December 31,
	2023		2022		2021
Discount rate	4.7	%	1.8	%	1.4	%
Compensation increases	3.5	%	3.5	%	3.5	%

Change in Benefit Obligation, Fair Value of Plan Assets, Funded Status and Balance Sheet Classification of Defined Benefit Pension Plans

Benefit obligation and balance sheet classification:

	December 31,
	2023		2022
January 1	$	130.8	$	153.0
Service cost	3.4		4.5
Interest cost	5.7		2.6
Amendments	6.9		5.8
Actuarial (gain) loss	6.3		(24.7)
Benefits paid	(10.9)		(10.4)
December 31	$	142.2	$	130.8

Other current liabilities	$	11.9	$	10.5
Long-term liabilities	130.3		120.3
Total Benefit Obligation	$	142.2	$	130.8

Weighted Average Assumptions Used to Determine Benefit Obligation

Weighted average assumptions:

	December 31,
	2023		2022
Discount rate	4.6	%	4.8	%
Compensation increases	3.5	%	3.5	%

Estimated Benefits Expected to be Paid

At December 31, 2023, the estimated benefits expected to be paid over the next 10 years:

2024	$	11.9
2025	13.2
2026	13.4
2027	13.5
2028	13.1
2029 - 2033	52.9