Commitments and Contingencies (Details)	Dec. 29, 2012	Mar. 30, 2013 Total Number of Employees Employees represented under collective bargaining agreements Corydon, Indiana
Federal Trade Commissions Litigation
Microporous revenues as percent of consolidated revenues	10.00%
Microporous operating income as percent of consolidated operating income	13.00%
Microporous assets as percent of consolidated assets, maximum	5.00%
Collective Bargaining Agreements
Concentration risk (as a percent)		3.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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