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Postretirement and Other Benefits (Tables)

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Net Pension Benefit Costs

The components of net pension and OPEB benefit costs for U.S. employees and net pension benefit costs for French employees during the three or nine months ended September 30, 2018 and 2017 were as follows ($ in millions):

	Three Months Ended September 30,
	U.S. Pension Benefits								French Pension Benefits								U.S. OPEB Benefits
	2018				2017				2018				2017				2018				2017
Service cost	$	—			$	—			$	0.2			$	0.3			$	—			$	—
Interest cost	1.0				1.2				0.1				0.1				—				—
Expected return on plan assets	(1.5		)		(1.6		)		—				—				—				—
Amortizations and other	0.7				0.6				0.2				0.3				0.1				0.1
Net periodic benefit cost	$	0.2			$	0.2			$	0.5			$	0.7			$	0.1			$	0.1

	Nine Months Ended September 30,
	U.S. Pension Benefits								French Pension Benefits								U.S. OPEB Benefits
	2018				2017				2018				2017				2018				2017
Service cost	$	—			$	—			$	0.8			$	0.8			$	—			$	—
Interest cost	3.2				3.6				0.3				0.3				—				—
Expected return on plan assets	(4.4		)		(4.8		)		(0.1		)		(0.1		)		—				—
Amortizations and other	2.4				2.4				0.6				0.9				0.2				0.2
Net periodic benefit cost	$	1.2			$	1.2			$	1.6			$	1.9			$	0.2			$	0.2

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- References

No definition available.

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- Definition

Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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