Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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 210.5-02.13)

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

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 13

-Subparagraph a

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 7

Name:	us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Fixed Assets (Detail) In Thousands, unless otherwise specified	Dec. 31, 2014 USD ($)	Dec. 31, 2014 CNY	Dec. 31, 2013 CNY	Dec. 31, 2014 Computer equipment USD ($)	Dec. 31, 2014 Computer equipment CNY	Dec. 31, 2013 Computer equipment CNY	Dec. 31, 2014 Office building USD ($)	Dec. 31, 2014 Office building CNY	Dec. 31, 2013 Office building CNY	Dec. 31, 2014 Office building related facility, machinery and equipment USD ($)	Dec. 31, 2014 Office building related facility, machinery and equipment CNY	Dec. 31, 2013 Office building related facility, machinery and equipment CNY	Dec. 31, 2014 Vehicles USD ($)	Dec. 31, 2014 Vehicles CNY	Dec. 31, 2013 Vehicles CNY	Dec. 31, 2014 Office equipment USD ($)	Dec. 31, 2014 Office equipment CNY	Dec. 31, 2013 Office equipment CNY	Dec. 31, 2014 Leasehold improvements USD ($)	Dec. 31, 2014 Leasehold improvements CNY	Dec. 31, 2013 Leasehold improvements CNY	Dec. 31, 2014 Construction in Progress USD ($)	Dec. 31, 2014 Construction in Progress CNY	Dec. 31, 2013 Construction in Progress CNY
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,350,619us-gaap_PropertyPlantAndEquipmentGross	14,584,658us-gaap_PropertyPlantAndEquipmentGross	9,322,110us-gaap_PropertyPlantAndEquipmentGross	$ 1,573,719	9,764,297	6,562,127	$ 286,344	1,776,651	911,482	$ 93,024	577,178	158,174	$ 4,732	29,363	14,996	$ 55,193	342,452	242,065	$ 50,136	311,076	234,180	$ 287,471	1,783,641	1,199,086
Accumulated depreciation	(947,569)	(5,879,294)	(3,951,842)
Fixed assets, net	$ 1,403,050us-gaap_PropertyPlantAndEquipmentNet	8,705,364us-gaap_PropertyPlantAndEquipmentNet	5,370,268us-gaap_PropertyPlantAndEquipmentNet