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Fair Value Disclosure And Measurement (Detail)
In Thousands, unless otherwise specified
12 Months Ended 12 Months Ended
Dec. 31, 2012
USD ($)
Dec. 31, 2012
CNY
Dec. 31, 2011
CNY
Dec. 31, 2010
CNY
Dec. 31, 2012
Time Deposits
USD ($)
Dec. 31, 2012
Time Deposits
CNY
Dec. 31, 2011
Time Deposits
CNY
Dec. 31, 2012
Money Market Fund
USD ($)
Dec. 31, 2012
Money Market Fund
CNY
Dec. 31, 2011
Money Market Fund
CNY
Dec. 31, 2012
Fair Value, Inputs, Level 1
CNY
Dec. 31, 2011
Fair Value, Inputs, Level 1
CNY
Dec. 31, 2012
Fair Value, Inputs, Level 1
Money Market Fund
CNY
Dec. 31, 2011
Fair Value, Inputs, Level 1
Money Market Fund
CNY
Dec. 31, 2012
Fair Value, Inputs, Level 2
CNY
Dec. 31, 2011
Fair Value, Inputs, Level 2
CNY
Dec. 31, 2012
Fair Value, Inputs, Level 2
Time Deposits
CNY
Dec. 31, 2011
Fair Value, Inputs, Level 2
Time Deposits
CNY
Dec. 31, 2012
Fair Value, Inputs, Level 3
CNY
Dec. 31, 2011
Fair Value, Inputs, Level 3
CNY
Dec. 31, 2012
Short-term Investments
Fixed-rate Investments
USD ($)
Dec. 31, 2012
Short-term Investments
Fixed-rate Investments
CNY
Dec. 31, 2011
Short-term Investments
Fixed-rate Investments
CNY
Dec. 31, 2011
Short-term Investments
Adjustable-rate Investments
CNY
Dec. 31, 2012
Short-term Investments
Fair Value, Inputs, Level 2
Fixed-rate Investments
CNY
Dec. 31, 2011
Short-term Investments
Fair Value, Inputs, Level 2
Fixed-rate Investments
CNY
Dec. 31, 2011
Short-term Investments
Fair Value, Inputs, Level 2
Adjustable-rate Investments
CNY
Dec. 31, 2012
Long Term Investments
Fixed-rate Investments
USD ($)
Dec. 31, 2012
Long Term Investments
Fixed-rate Investments
CNY
Dec. 31, 2012
Long Term Investments
Fair Value, Inputs, Level 2
Fixed-rate Investments
CNY
Dec. 31, 2012
Fair Value, Measurements, Recurring
Short-term Investments
Fixed-rate Investments
USD ($)
Dec. 31, 2012
Fair Value, Measurements, Recurring
Short-term Investments
Fixed-rate Investments
CNY
Dec. 31, 2012
Fair Value, Measurements, Recurring
Short-term Investments
Adjustable-rate Investments
USD ($)
Dec. 31, 2012
Fair Value, Measurements, Recurring
Short-term Investments
Adjustable-rate Investments
CNY
Dec. 31, 2011
Fair Value, Measurements, Recurring
Short-term Investments
Adjustable-rate Investments
CNY
Dec. 31, 2012
Fair Value, Measurements, Recurring
Short-term Investments
Fair Value, Inputs, Level 2
Fixed-rate Investments
CNY
Dec. 31, 2012
Fair Value, Measurements, Recurring
Short-term Investments
Fair Value, Inputs, Level 2
Adjustable-rate Investments
CNY
Dec. 31, 2011
Fair Value, Measurements, Recurring
Short-term Investments
Fair Value, Inputs, Level 2
Adjustable-rate Investments
CNY
Dec. 31, 2012
Fair Value, Measurements, Nonrecurring
USD ($)
Dec. 31, 2012
Fair Value, Measurements, Nonrecurring
CNY
Dec. 31, 2011
Fair Value, Measurements, Nonrecurring
CNY
Dec. 31, 2012
Fair Value, Measurements, Nonrecurring
Fair Value, Inputs, Level 3
CNY
Dec. 31, 2011
Fair Value, Measurements, Nonrecurring
Fair Value, Inputs, Level 3
CNY
Cash equivalents                                                                                      
Cash equivalents         $ 487,062 3,034,443 2,419,726 $ 779,165 4,854,278 192,324     4,854,278 192,324     3,034,443 2,419,726                                                  
Short-term investments                                                                                      
Held-to-maturity securities                                         2,742,533 17,086,252 9,834,275 100,027 17,086,252 9,834,275 100,027 82,601 514,614 514,614                          
Available-for-sale securities                                                                                      
Available-for-sale securities                                                             564,100 3,514,399 2,740 17,073 102,682 3,514,399 17,073 102,682          
Long-term investments                                                                                      
Held-to-maturity securities                                         2,742,533 17,086,252 9,834,275 100,027 17,086,252 9,834,275 100,027 82,601 514,614 514,614                          
Long-term notes payable 1,512,060 9,420,285                 9,420,285                                                                
Non-recurring                                                                                      
Long-term investments                                                                             0 0 0 0 0
Intangible assets                                                                                 0   0
Goodwill                                                                                 0   0
Total assets measured at fair value 566,840 3,531,472 102,682               0 0     3,531,472 102,682     0 0                                              
Long-term investments, losses (27,155) (169,180) (47,886) 0                                                                     (27,155) (169,180) (47,886)    
Intangible assets, losses                                                                                 (8,040)    
Goodwill, losses 0 0 (113,011)                                                                           (113,011)    
Total losses $ (27,155) (169,180) (168,937)