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Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2018

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Schedule of Net Benefit (Credits) Costs [Table Text Block]

The components of net periodic benefit cost (credit) are as follows:

		Pension Benefits
		Three Months Ended
		March 31,
		2018				2017
		(in millions)
Service cost		$	1.1			$	0.8
Interest cost		6.9				6.8
Expected asset return		(11.5		)		(10.5		)
Amortized loss		2.2				1.7
Curtailment		3.2				—
Net periodic benefit cost (credit)		$	1.9			$	(1.2	)
		Other Postretirement Benefits
		Three Months Ended
		March 31,
		2018				2017
		(in millions)
Service cost		$	0.1			$	0.1
Interest cost		3.1				3.3
Amortized loss		0.2				0.2
Amortized prior service credit		(0.7		)		(0.7		)
Net periodic benefit cost		$	2.7			$	2.9

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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