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Variable interest entities (Details)
In Millions, unless otherwise specified
12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Mar. 31, 2011
JPY (¥)
Mar. 31, 2010
JPY (¥)
Mar. 31, 2009
JPY (¥)
May 31, 2011
Mar. 31, 2008
JPY (¥)
Jan. 31, 2010
Mexican Subsidiary [Member]
JPY (¥)
Mar. 31, 2010
Mexican Subsidiary [Member]
JPY (¥)
Jan. 31, 2009
Mexican Subsidiary [Member]
JPY (¥)
Mar. 31, 2011
Subsidiaries [Member]
USD ($)
Mar. 31, 2011
Subsidiaries [Member]
JPY (¥)
Mar. 31, 2011
Variable Interest Entity, Not the Primary Beneficiary [Member]
USD ($)
Mar. 31, 2011
Variable Interest Entity, Not the Primary Beneficiary [Member]
JPY (¥)
Mar. 31, 2011
Variable Interest Entity [Member]
USD ($)
Mar. 31, 2011
Variable Interest Entity [Member]
JPY (¥)
Mar. 31, 2011
Variable Interest Entity [Member]
Guarantee of Indebtedness of Others [Member]
USD ($)
Mar. 31, 2011
Variable Interest Entity [Member]
Market Value Guarantee [Member]
USD ($)
Mar. 31, 2011
Sony's U.S. based music publishing subsidiary [Member]
JPY (¥)
Assets [Abstract]                                  
Cash and cash equivalents ¥ 1,014,412 ¥ 1,191,608 ¥ 660,789   ¥ 1,086,431                       ¥ 4,862
Account receivables, net                                 227
Other current assets                                 20,603
Property, plant and equipment, net 924,868 1,007,951                       14,837     863
Intangibles, net 391,122 378,917                             57,895
Goodwill 469,005 438,869 443,958                           12,689
Other 460,054 475,985                             7,574
Total assets 12,924,988 12,866,114                       104,713     104,713
Liabilities [Abstract]                                  
Accounts payable and accrued expenses                                 32,034
Other current liabilities 430,488 376,340                             2,619
Other 226,952 188,088                             1,893
Total liabilities 9,969,086 9,580,559                       36,546     36,546
Variable Interest Entities (Textuals) [Abstract]                                  
Maximum sale price to obligate company for shortfall                         255        
Absolute amount company obligated to pay for minimum guarantee                               214  
Value of building for purchase during lease term                         255        
Property, plant and equipment, net 924,868 1,007,951                       14,837     863
Long-term debt                           21,236      
Guaranteed annual dividend for third party investor                         17.5        
Guarantee for minimum offer to creditor of third party investor                             303    
Ownership interest of third party investors in music publishing subsidiary                         50.00% 50.00%      
Minimum fair value of assets held by trust                         303        
Total assets 12,924,988 12,866,114                       104,713     104,713
Total liabilities 9,969,086 9,580,559                       36,546     36,546
Joint venture agreement for acquiring international distribution rights                     12            
Purchase commitment excluding long term commitment quantity acquired       12                          
Amount of financing capitalized for joint venture agreement                     406            
Amount of financing contributed by subsidiary determined as primary beneficiary                     11            
Amount of financing contributed by unrelated third party investors                     95            
Amount of financing funded through bank credit facility                     300            
Film costs related to international distribution rights acquired from VIE                   67              
Participation liabilities due to VIE                   1,098              
Number of films to be financed under two agreements with VIEs                 19                
Amount received under two agreements with VIEs to fund production or acquisition cost of films                 565                
Commitment received from third VIE to fund production or acquisition cost of films on revolving basis                 525                
Number of films released                   18              
Amount funded by third VIE                 554                
Ownership interest sold in subsidiary           90.00%                      
Sold other assets including machinery and equipment 18,743 15,671 153,439     4,520                      
Sold inventories               5,619                  
Received in connection with sale of controlling interest in subsidiary             11,189                    
Loss in connection with sale of controlling interest in subsidiary             1,664                    
Accounts receivable-non trade                       21,953          
Accounts payable                       ¥ 20,853