Document and Entity Information	12 Months Ended
	Dec. 31, 2019 shares
Document And Entity Information [Abstract]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Voluntary Filers	No
Entity Emerging Growth Company	false
Entity Registrant Name	Teekay Offshore Partners L.P.
Entity Central Index Key	0001382298
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding	411,148,991