Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2011	Feb. 16, 2012	Jun. 30, 2011
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Trading Symbol	PII
Entity Registrant Name	Polaris Industries Inc/MN
Entity Central Index Key	0000931015
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		68,457,255
Entity Public Float			$ 3,710,299,000