v2.4.0.6
Reportable Segments and Reconciliation to Consolidated Net Income (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Mar. 31, 2012
Segment Reporting Information [Line Items]        
Net sales $ 16,070 $ 13,185    
Segment operating expenses 15,629 [1] 12,787 [1]    
Stock-based compensation (229) (160) (901) (605)
Other operating income (expense), net (31) [2] (46) [2]    
Income (loss) from operations 181 192    
Total non-operating income (expense) (100) (108)    
Benefit (provision) for income taxes 18 (43)    
Equity-method investment activity, net of tax (17) 89    
Net income 82 130 (87) 561
North America
        
Segment Reporting Information [Line Items]        
Net sales 9,391 7,427    
Segment operating expenses 8,934 [1] 7,078 [1]    
International
        
Segment Reporting Information [Line Items]        
Net sales 6,679 5,758    
Segment operating expenses 6,695 [1] 5,709 [1]    
Operating Segments
        
Segment Reporting Information [Line Items]        
Income (loss) from operations 441 398    
Operating Segments | North America
        
Segment Reporting Information [Line Items]        
Income (loss) from operations 457 349    
Operating Segments | International
        
Segment Reporting Information [Line Items]        
Income (loss) from operations $ (16) $ 49    
[1] Represents operating expenses, excluding stock-based compensation and "Other operating expense (income), net," which are not allocated to segments.
[2] Includes stock-based compensation as follows: Fulfillment $ 61 $ 37 Marketing 16 12 Technology and content 120 85 General and administrative 32 26