Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Apr. 01, 2019	Jun. 30, 2018
Document And Entity Information
Entity Registrant Name	UNITED STATES ANTIMONY CORP
Entity Central Index Key	0000101538
Document Type	10-K/A
Document Period End Date	Dec. 31, 2018
Amendment Flag	true
Amendment Description	To update financials.
Current Fiscal Year End Date	--12-31
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Shell Company	false
Entity Public Float			$ 23,523,836
Entity Common Stock, Shares Outstanding		68,427,171
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2018