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PRINCIPAL ACCOUNTING POLICIES (Details 4) | 12 Months Ended
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Dec. 31, 2013
Building | Minimum |
Property, equipment and software |
Estimated useful life | 20 years
Building | Maximum |
Property, equipment and software |
Estimated useful life | 30 years
Website-related equipment |
Property, equipment and software |
Estimated useful life | 5 years
Computer equipment | Minimum |
Property, equipment and software |
Estimated useful life | 3 years
Computer equipment | Maximum |
Property, equipment and software |
Estimated useful life | 5 years
Furniture and fixtures | Minimum |
Property, equipment and software |
Estimated useful life | 3 years
Furniture and fixtures | Maximum |
Property, equipment and software |
Estimated useful life | 5 years
Software | Minimum |
Property, equipment and software |
Estimated useful life | 3 years
Software | Maximum |
Property, equipment and software |
Estimated useful life | 5 years

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- Details
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Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration