Document and Entity Information (USD $)	12 Months Ended
	Mar. 31, 2014	Nov. 10, 2014	Dec. 31, 2013	Sep. 27, 2013	Dec. 31, 2012
Document and Entity Information
Entity Registrant Name	LOGITECH INTERNATIONAL SA
Entity Central Index Key	0001032975
Document Type	10-K
Document Period End Date	Mar. 31, 2014
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 2,200,000,000	$ 1,324,236,669	$ 1,200,000,000
Entity Common Stock, Shares Outstanding		163,259,279
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY