The Company and Significant Accounting Policies (Straight-line Method Depreciation Expense, Useful Life) (Details)	12 Months Ended
Dec. 31, 2011 years
Stores and other buildings [Member]
Useful life, minimum (in years)	7
Useful life, maximum (in years)	40
Fixtures and equipment [Member]
Useful life, minimum (in years)	3
Useful life, maximum (in years)	15

The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration