Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

No definition available.

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Segment Information Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	11 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended
	Dec. 29, 2012 segment	Dec. 31, 2011 Successor	Dec. 29, 2012 Successor	Jan. 28, 2011 Predecessor	Jan. 01, 2011 Predecessor	Dec. 29, 2012 Customer Concentration Risk Sales Revenue, Goods, Net customer
Segment Reporting Information [Line Items]
Number of operating segments	4
Number of major customers						1
Export sales		$ 37.9	$ 32.1	$ 3.0	$ 33.5