Employee Benefits Schedule of Net Benefit Costs (Tables)

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

Net Periodic Cost

The components of net periodic benefit cost and key assumptions are listed below.

	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
Years ended December 31,	2023		2022		2021		2023		2022		2021		2023		2022		2021
Service cost	$	0.0	$	0.0	$	0.0	$	2.2	$	4.6	$	4.5	$	0.0	$	0.0	$	0.0
Interest cost	4.0		2.8		2.9		15.6		8.9		8.0		0.9		0.6		0.7
Expected return on plan assets	(4.0)		(4.7)		(5.6)		(17.0)		(19.8)		(20.8)		0.0		0.0		0.0
Curtailment and settlement	0.0		0.0		1.5		(0.3)		0.0		(0.9)		0.0		0.0		0.0
Amortization of:
Prior service cost (credit)	0.1		0.0		0.0		0.1		0.1		0.1		0.0		0.0		0.0
Net actuarial losses	1.6		1.4		1.7		5.0		4.4		6.7		0.0		0.4		0.9
Net periodic cost	$	1.7	$	(0.5)	$	0.5	$	5.6	$	(1.8)	$	(2.4)	$	0.9	$	1.0	$	1.6

Assumptions

	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
Years ended December 31,	2023		2022		2021		2023		2022		2021		2023		2022		2021
Net periodic cost
Discount rate	5.65	%	2.95	%	2.60	%	4.62	%	1.86	%	1.35	%	5.65	%	2.90	%	2.50	%
Rate of compensation increase	N/A		N/A		N/A		2.80	%	2.65	%	2.47	%	N/A		N/A		N/A
Expected return on plan assets	6.00	%	5.00	%	5.75	%	5.62	%	4.47	%	4.47	%	N/A		N/A		N/A
Interest crediting rates	5.10	%	5.10	%	5.10	%	1.50	%	1.50	%	1.50	%	N/A		N/A		N/A
Benefit obligation
Discount rate	5.40	%	5.65	%	2.95	%	4.32	%	4.62	%	1.86	%	5.40	%	5.65	%	2.90	%
Rate of compensation increase	N/A		N/A		N/A		3.35	%	2.80	%	2.65	%	N/A		N/A		N/A
Interest crediting rates	5.10	%	5.10	%	5.10	%	1.50	%	1.50	%	1.50	%	N/A		N/A		N/A
Healthcare cost trend rate assumed for next year
Initial rate (weighted-average)													6.50	%	6.75	%	6.50	%
Year ultimate rate is reached													2030		2030		2028
Ultimate rate													5.00	%	5.00	%	5.00	%