Accounting Policies, by Policy (Policies)	6 Months Ended
Jun. 30, 2012
Basis of Accounting, Policy [Policy Text Block]	On January 1, 2012, we changed from a traditional month-end calendar close cycle to a 4-4-5 calendar close methodology. Under this new methodology, each quarter (formerly comprised of 3 calendar months) is comprised of 13 weeks, which includes two 4-week months and one 5-week month.

Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).

No definition available.

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