Cover	3 Months Ended
	Mar. 31, 2022 shares
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-11625
Entity Registrant Name	Pentair plc
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0000077360
Entity Incorporation, State or Country Code	L2
Entity Tax Identification Number	98-1141328
Entity Address, Address Line One	Regal House, 70 London Road,
Entity Address, Address Line Two	Twickenham,
Entity Address, City or Town	London,
Entity Address, Postal Zip Code	TW13QS
Entity Address, Country	GB
Country Region	44
City Area Code	74
Local Phone Number	9421-6154
Title of 12(b) Security	Ordinary Shares, nominal value $0.01 per share
Trading Symbol	PNR
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Amendment Flag	false
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	165,399,674