Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Aug. 01, 2018
Document and Entity Information
Entity Registrant Name	TUTOR PERINI CORP
Entity Central Index Key	0000077543
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		50,016,328
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Trading Symbol	tpc