v3.25.1
Cover
Apr. 24, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Apr. 24, 2025
Entity File Number 001-42161
Entity Registrant Name Smurfit Westrock plc
Entity Central Index Key 0002005951
Entity Tax Identification Number 98-1776979
Entity Incorporation, State or Country Code L2
Entity Address, Address Line One Beech Hill
Entity Address, Address Line Two Clonskeagh
Entity Address, City or Town Dublin 4
Entity Address, Country IE
Entity Address, Postal Zip Code D04 N2R2
City Area Code 353
Local Phone Number 1 202 7000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Ordinary shares, par value $0.001 per share
Trading Symbol SW
Security Exchange Name NYSE
Entity Emerging Growth Company false