v3.26.1
Cover
Sep. 02, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Sep. 02, 2026
Entity File Number 001-35971
Entity Registrant Name Allegion plc
Entity Central Index Key 0001579241
Entity Tax Identification Number 98-1108930
Entity Incorporation, State or Country Code L2
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, Country IE
Entity Address, Postal Zip Code D07 X324
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
Ordinary shares, par value $0.01 per share  
Title of 12(b) Security Ordinary shares, par value $0.01 per share
Trading Symbol ALLE
Security Exchange Name NYSE
3.500% Senior Notes due 2029  
Title of 12(b) Security 3.500% Senior Notes due 2029
Trading Symbol ALLE 3 ½
Security Exchange Name NYSE