Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_AccruedLiabilitiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Commitments and Contingencies (Details Textual) In Millions, unless otherwise specified	12 Months Ended			12 Months Ended
	Dec. 30, 2012 CAD	Dec. 30, 2012 USD ($)	Jan. 01, 2012 USD ($)	Dec. 30, 2012 Maximum [Member]	Dec. 30, 2012 Environmental Reserves [Member] USD ($)
Valuation and Qualifying Accounts Disclosure [Line Items]
Reserves for environmental remediation obligations		$ 3.2
Portion of reserves included in current accrued liabilities		256.7	230.8		0.3
Estimated duration of environmental remediation of all sites				30 years
Lawsuits relief including damages (in excess of $20.0 million CAD)	20.0