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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2019
Feb. 21, 2020
Jun. 28, 2019
Document and Entity Information [Abstract]      
Entity Registrant Name Tutor Perini Corporation    
Entity Central Index Key 0000077543    
Document Type 10-K    
Document Period End Date Dec. 31, 2019    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 549,519,663
Entity Common Stock, Shares Outstanding   50,298,607  
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Trading Symbol TPC    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Document Annual Report true    
Document Transition Report false    
Entity File Number 1-6314    
Entity Incorporation, State or Country Code MA    
Entity Tax Identification Number 04-1717070    
Entity Address, Address Line One 15901 Olden Street    
Entity Address, City or Town Sylmar    
Entity Address, Postal Zip Code 91342    
Entity Address, State or Province CA    
City Area Code 818    
Local Phone Number 362-8391    
Title of 12(b) Security Common Stock, $1.00 par value    
Security Exchange Name NYSE    
Entity Interactive Data Current Yes    
Documents Incorporated by Reference [Text Block] Documents Incorporated by Reference

The information required by Part III of this Annual Report on Form 10-K, to the extent not set forth herein, is incorporated herein by reference to the registrant’s definitive proxy statement relating to the Annual Meeting of Shareholders to be held in 2020, which definitive proxy statement shall be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this Annual Report on Form 10-K relates.