v3.26.1
Cover
Jun. 04, 2026
Entity Information [Line Items]  
Central Index Key 0001579241
Entity Incorporation, State or Country Code L2
Document Type 8-K
Registrant Name Allegion plc
Country Region 353
City Area Code 1
Local Phone Number 6833399
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity File Number 001-35971
Entity Tax Identification Number 98-1108930
Amendment Flag false
Document Period End Date Jun. 04, 2026
Entity Address, Address Line One Unit No. 233
Entity Address, Address Line Two The Capel Building
Entity Address, Address Line Three Mary's Abbey
Entity Address, City or Town Dublin 7
Entity Address, Postal Zip Code D07 X324
Entity Address, Country IE
Common Stock [Member]  
Entity Information [Line Items]  
Title of 12(b) Security Ordinary shares, par value $0.01 per share
Trading Symbol ALLE
Security Exchange Name NYSE
Three Point Five Percent Senior Notes Due 2029 [Member]  
Entity Information [Line Items]  
Title of 12(b) Security 3.500% Senior Notes due 2029
Trading Symbol ALLE 3 ½
Security Exchange Name NYSE