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

Lawsuits, Claims, Commitments, Contingencies and Related Matters (Details Textual) In Millions, unless otherwise specified	3 Months Ended				3 Months Ended
	Mar. 31, 2013 CAD	Mar. 31, 2013 USD ($)	Dec. 30, 2012 USD ($)	Mar. 31, 2013 Environmental Reserves [Member] USD ($)	Mar. 31, 2013 Maximum [Member]
Lawsuits, Claims, Commitments, Contingencies and Related Matters (Additional Textual) [Abstract]
Portion of reserves included in current accrued liabilities		$ 232.9	$ 256.7	$ 0.3
Site Contingency, Estimated Duration of Remediation					30 years
Lawsuits, Claims, Commitments, Contingencies and Related Matters (Textual) [Abstract]
Reserves for environmental remediation obligations		3.2
Lawsuit relief including damages (in excess of $20.0 million CAD)	20.0