v2.4.0.6

Summary of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Overall Contribution by Giant Network, VIE, and Its Subsidiaries as well as Company and Other Entities within Group to Group's Total Net Income and Total Comprehensive Income | The following table represents the overall contribution by our Giant Network, the VIE, and its subsidiaries as well as the Company and other entities within the Group to the Group’s total net income and total comprehensive income:
|  | For year ended December 31, |
|  | 2010 |  |  | 2011 |
|  | RMB |  |  | RMB |
Net income (loss) attributable to the Company’s shareholders |  |  |  |  |  |  |  |
Giant Network and its subsidiaries |  |  | 1,091,837,769 |  |  |  | 1,515,790,079 |
The Company and other entities within the Group |  |  | (280,649,936 | ) |  |  | (635,823,205 | )
|  |  | 811,187,833 |  |  |  | 879,966,874 |
Other comprehensive loss |  |  |  |  |  |  |  |
Giant Network and its subsidiaries |  |  | — |  |  |  | — |
The Company and other entities within the Group |  |  | (87,734,291 | ) |  |  | (100,725,366 | )
|  |  | (87,734,291 | ) |  |  | (100,725,366 | )
Comprehensive income |  |  | 723,453,542 |  |  |  | 779,241,508 |
Estimated Useful Lives for Depreciation Computed Using Straight-line Method | Property and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the following estimated useful lives:
Computer equipment |  | 5 years
Leasehold improvements |  | Over the shorter of the lease term or the estimated useful lives of the assets
Furniture and fixtures |  | 5 years
Motor vehicles |  | 5 years
Property |  | 42 years

X
- Definition Tabular disclosure of the contribution by the Variable Interest Entity (VIE) and its subsidiaries and other entities within the company to the total net income (loss) attributable to the Company's shareholders and total comprehensive income of the company. + References No definition available. + Details
Name: | ga_ScheduleOfNetIncomeAndComprehensiveIncomeBetweenVariableInterestEntitiesSubsidiariesAndOtherEntitiesWithinCompanyTableTextBlock
Namespace Prefix: | ga_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services 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. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph b -Article 5 Reference 4: 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 + Details
Name: | us-gaap_PropertyPlantAndEquipmentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration