Document and Entity Information	12 Months Ended
	Mar. 31, 2012
Document Information [Line Items]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Mar. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Trading Symbol	SNE
Entity Registrant Name	SONY CORP
Entity Central Index Key	0000313838
Current Fiscal Year End Date	--03-31