The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities.

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+ Details

Contingencies and Other (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended					9 Months Ended
	Oct. 01, 2011	Oct. 01, 2011 Kleen Products LLC v. Packaging Corp. of America (N.D. Ill.) [Member]	Oct. 01, 2011 Putative Class Action Lawsuits [Member]	Sep. 14, 2011 Putative Class Action Lawsuits [Member]	Aug. 16, 2011 Putative Class Action Lawsuits [Member]	Oct. 01, 2011 Bogalusa Incident [Member]
Loss Contingencies [Line Items]
Number of defendants named		8
Number of similar complaints filed and consolidated		4
Number of lawsuits filed				4	3
Number of lawsuits pending in the Delaware Court of Chancery			2
Release of remaining litigation reserve	$ 3
Site Contingency [Line Items]
Costs related to clean-up activities						$ 5