Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Jun. 27, 2015
Document Information [Line Items]
Entity Registrant Name	PENTAIR PLC
Entity Central Index Key	0000077360
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Amendment Flag	false
Trading Symbol	PNR
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Common Stock, Shares Outstanding	180,455,693
Entity Public Float		$ 11,256,593,708