Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2023	May 04, 2023
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Entity Registrant Name	AMPCO-PITTSBURGH CORP
Entity Central Index Key	0000006176
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		19,403,519
Entity File Number	1-898
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
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	PA
Document Quarterly Report	true
Document Transition Report	false
Common Stock [Member]
Document Information [Line Items]
Trading Symbol	AP
Title of 12(b) Security	Common Stock, $1 par value
Security Exchange Name	NYSE
Series A Warrants [Member]
Document Information [Line Items]
Trading Symbol	AP WS
Title of 12(b) Security	Series A Warrants to purchase shares of Common Stock
Security Exchange Name	NYSEAMER