Document and Entity Information	6 Months Ended
	Jun. 29, 2013
Document Information [Line Items]
Entity Registrant Name	PENTAIR LTD
Entity Central Index Key	0000077360
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 29, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Amendment Flag	false
Trading Symbol	PNR
Entity Common Stock, Shares Outstanding	199,150,131