Employee Benefits Schedule of Net Benefit Costs (Tables)

12 Months Ended

Dec. 31, 2017

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

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,	2017			2016			2015			2017			2016			2015			2017			2016			2015
Service cost	$	0.0		$	0.0		$	0.0		$	4.9		$	6.7		$	11.1		$	0.0		$	0.0		$	0.0
Interest cost	5.1			5.9			0.3			13.5			15.1			18.9			1.3			1.5			1.5
Expected return on plan assets	(6.2		)	(6.6		)	(7.6		)	(17.7		)	(18.7		)	(20.6		)	0.0			0.0			0.0
Settlement and curtailment losses (gains)	0.0			0.0			0.0			6.8			0.4			(0.2		)	0.0			0.0			0.0
Amortization of:
Prior service cost (credit)	0.0			0.0			0.0			0.1			0.1			0.1			(0.2		)	(0.2		)	(0.1		)
Net actuarial losses	1.5			1.3			6.5			5.5			4.2			4.1			0.0			0.0			0.0
Net periodic cost	$	0.4		$	0.6		$	(0.8	)	$	13.1		$	7.8		$	13.4		$	1.1		$	1.3		$	1.4

Assumptions

	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
Years ended December 31,	2017		2016		2015		2017		2016		2015		2017		2016		2015
Net periodic cost
Discount rate	4.20	%	4.80	%	4.15	%	2.52	%	3.61	%	3.41	%	4.05	%	4.65	%	4.00	%
Rate of compensation increase	N/A		N/A		N/A		2.36	%	3.18	%	2.99	%	N/A		N/A		N/A
Expected return on plan assets	7.00	%	7.00	%	7.00	%	4.66	%	5.38	%	5.01	%	N/A		N/A		N/A
Benefit obligation
Discount rate	3.70	%	4.20	%	4.80	%	2.36	%	2.52	%	3.61	%	3.65	%	4.05	%	4.65	%
Rate of compensation increase	N/A		N/A		N/A		2.37	%	2.36	%	3.25	%	N/A		N/A		N/A
Health care cost trend rate assumed for next year
Initial rate (weighted-average)													6.50	%	6.75	%	7.00	%
Year ultimate rate is reached													2024		2024		2024
Ultimate rate													5.00	%	5.00	%	5.00	%