Other Expense, Net (Tables)

12 Months Ended

Dec. 31, 2014

Other Income and Expenses [Abstract]

Components of Other (Income) Expense

The components of other expense, net, were as follows (in millions):

	Year Ended December 31
	2014		2013		2012
Integration-related and other costs (a)	$	20.0	$	17.4	$	—
Class action lawsuit settlement (b)	17.6		—		—
DeRidder restructuring (c)	7.3		—		—
Pension curtailment charges (d)	—		10.9		—
Acquisition-related costs (e)	—		17.2		—
Asset disposals and write-offs	10.1		13.2		10.8
Other	2.3		0.3		1.0
Total	$	57.3	$	59.0	$	11.8

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(a) Includes Boise acquisition integration-related and other costs, which primarily relate to severance, retention, travel, and professional fees.

(b) Includes $17.6 million of costs for the settlement of the Kleen Products LLC v Packaging Corp. of America et al class action lawsuit. See Note 20, Commitments, Guarantees, Indemnifications, and Legal Proceedings, for more information.

(c) Costs relate primarily to the conversion of the No. 3 newsprint machine at our DeRidder, Louisiana, mill to produce lightweight linerboard and corrugating medium, and our exit from the newsprint business in September 2014.

(d) Includes $10.9 million of non-cash pension curtailment charges related to pension plan changes in which certain hourly corrugated plant and containerboard mill employees will transition from a defined benefit pension plan to a defined contribution (401k) plan.

(e) Includes $17.2 million of acquisition-related costs, primarily for professional fees related to transaction-advisory services and expenses related to financing the acquisition of Boise.