Document and Entity Information	3 Months Ended
	Mar. 31, 2019 shares
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
Entity Emerging Growth Company	false
Entity Small Business	false
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Trading Symbol	PNR
Entity Common Stock, Shares Outstanding	171,891,940