v3.26.1
Cover
Apr. 30, 2026
Cover [Abstract]  
Document Type 8-K
Document Period End Date Apr. 30, 2026
Entity Registrant Name GARRETT MOTION INC.
Entity Incorporation, State or Country Code DE
Entity File Number 1-38636
Entity Tax Identification Number 82-4873189
Entity Address, Country CH
Entity Address, City or Town Rolle
Entity Address, City or Town La Pièce 16
Entity Address, Postal Zip Code 1180
City Area Code 734
Local Phone Number 392 5500
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Amendment Flag false
Entity Central Index Key 0001735707
Entity Addresses [Line Items]  
Entity Address, City or Town Rolle
Entity Address, City or Town La Pièce 16
Entity Address, Postal Zip Code 1180
Entity Address, Country CH
Other Address  
Cover [Abstract]  
Entity Address, City or Town Plymouth
Entity Address, City or Town 47548 Halyard Drive
Entity Address, Postal Zip Code 48170
Entity Address, State or Province MI
Entity Addresses [Line Items]  
Entity Address, City or Town Plymouth
Entity Address, City or Town 47548 Halyard Drive
Entity Address, State or Province MI
Entity Address, Postal Zip Code 48170