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Document And Entity Information
Dec. 09, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Dec. 09, 2025
Entity Registrant Name AMPCO-PITTSBURGH CORPORATION
Entity Central Index Key 0000006176
Entity Emerging Growth Company false
Entity File Number 1-898
Entity Incorporation, State or Country Code PA
Entity Tax Identification Number 25-1117717
Entity Address, Address Line One 726 Bell Avenue
Entity Address, Address Line Two Suite 301
Entity Address, City or Town Carnegie
Entity Address, State or Province PA
Entity Address, Postal Zip Code 15106
City Area Code 412
Local Phone Number 456-4400
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $1 par value
Trading Symbol AP
Security Exchange Name NYSE