Document and Entity Information	6 Months Ended
	Jun. 30, 2019 shares
Cover page.
Entity Current Reporting Status	Yes
Security Exchange Name	NYSE
Entity Registrant Name	Pentair plc
Title of 12(b) Security	Ordinary Shares, nominal value $0.01 per share
Entity Incorporation, State or Country Code	L2
Document Transition Report	false
Document Quarterly Report	true
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
Entity File Number	001-11625
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
Trading Symbol	PNR
Entity Common Stock, Shares Outstanding	168,049,131
Entity Tax Identification Number	98-1141328
City Area Code	74
Local Phone Number	9421-6154
Entity Interactive Data Current	Yes
Entity Shell Company	false
Country Region	44
Entity Address, Address Line One	Regal House, 70 London Road,
Entity Address, Address Line Two	Twickenham,
Entity Address, City or Town	London,
Entity Address, Country	GB
Entity Address, Postal Zip Code	TW13QS