Financial Commitments (Narrative) (Details) - USD ($)						3 Months Ended	6 Months Ended
Financial Commitments (Narrative) (Details) - USD ($)	Apr. 22, 2024	Apr. 15, 2024	May 02, 2023	Oct. 31, 2022	Aug. 18, 2020	Jun. 30, 2025	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Apr. 20, 2017
Debt Instrument [Line Items]
Repayments of debt							$ 304,865,000	$ 800,819,000
BMO Harris Bank
Debt Instrument [Line Items]
Applicable margin on overdue amounts (as a percent)					2.00%
Unsecured Debt \| BMO Harris Bank
Debt Instrument [Line Items]
Fixed charge coverage ratio (maximum)					2.00
2024 Senior Notes \| Senior Notes \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Redemption price (as a percent)	100.00%
2024 Senior Notes \| Senior Notes \| Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Redemption price (as a percent)	111.875%
Percentage of principal amount redeemed (as a percent)	40.00%
2024 Senior Notes \| Senior Notes \| Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Redemption price (as a percent)	101.00%
2024 Senior Notes \| Senior Notes \| Private Placement
Debt Instrument [Line Items]
Face amount	$ 400,000,000.0
Interest rate	11.875%
2017 Senior Notes \| Senior Notes \| Private Placement
Debt Instrument [Line Items]
Face amount										$ 500,000,000.0
Interest rate										6.875%
2020 Credit Agreement \| BMO Harris Bank
Debt Instrument [Line Items]
Days prior to maturity		90 days
Increase (decrease) in line of credit		$ (5,000,000)
2020 Credit Agreement \| BMO Harris Bank \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis point spread, 1 month interest period			0.11448%
Basis point spread, 3 month interest period			0.26161%
Basis point spread, 6 month interest period			0.42826%
Basis spread on variable rate				1.00%	1.00%
Debt instrument, basis spread on variable rate adjustment				0.10%
2020 Credit Agreement \| BMO Harris Bank \| Federal Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate				0.50%	0.50%
2020 Credit Agreement \| Line of Credit \| BMO Harris Bank
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 425,000,000
Periodic payment principal percentage					0.25%
2020 Credit Agreement \| Term Loan B \| BMO Harris Bank
Debt Instrument [Line Items]
Repayments of debt						$ 121,900,000
Term Loan B \| BMO Harris Bank
Debt Instrument [Line Items]
Weighted-average annual interest rate on borrowings						9.20%	9.20%
Term Loan B \| BMO Harris Bank \| Secured Overnight Financing Rate (SOFR) \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate					4.50%
Term Loan B \| BMO Harris Bank \| Secured Overnight Financing Rate (SOFR) \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate					4.75%
Term Loan B \| BMO Harris Bank \| Base Rate \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate					3.50%
Term Loan B \| BMO Harris Bank \| Base Rate \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate					3.75%
First Lien \| BMO Harris Bank
Debt Instrument [Line Items]
Net leverage ratio (maximum)					1.35
Revolver
Debt Instrument [Line Items]
Unamortized debt issuance costs						$ 1,200,000	$ 1,200,000		$ 1,400,000
Revolver \| BMO Harris Bank
Debt Instrument [Line Items]
Weighted-average annual interest rate on borrowings						10.80%	10.80%
Remaining borrowing capacity						$ 170,000,000.0	$ 170,000,000.0
Revolver \| BMO Harris Bank \| Secured Overnight Financing Rate (SOFR) \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate					4.25%
Revolver \| BMO Harris Bank \| Secured Overnight Financing Rate (SOFR) \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate					4.75%
Revolver \| BMO Harris Bank \| Base Rate \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate					3.25%
Revolver \| BMO Harris Bank \| Base Rate \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate					3.75%
Revolver \| BMO Harris Bank \| Net Leverage Ratio \| Fiscal Quarter December 31, 2022
Debt Instrument [Line Items]
Net leverage ratio (maximum)					3.50
Revolver \| BMO Harris Bank \| Net Leverage Ratio \| Fiscal Quarter March 31, 2023
Debt Instrument [Line Items]
Net leverage ratio (maximum)					3.75
Revolver \| BMO Harris Bank \| Net Leverage Ratio \| Fiscal Quarter June 30, 2023
Debt Instrument [Line Items]
Net leverage ratio (maximum)					3.00
Revolver \| BMO Harris Bank \| Net Leverage Ratio \| Fiscal Quarter September 30, 2023
Debt Instrument [Line Items]
Net leverage ratio (maximum)					2.50
Revolver \| BMO Harris Bank \| Net Leverage Ratio \| Fiscal Quarter December 31, 2023
Debt Instrument [Line Items]
Net leverage ratio (maximum)					2.25
Revolver \| 2020 Credit Agreement \| BMO Harris Bank
Debt Instrument [Line Items]
Increase (decrease) in line of credit					$ 173,500,000
Accordion feature, percentage of LTM EBITDA					50.00%
Revolver \| 2020 Credit Agreement \| Line of Credit \| BMO Harris Bank
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 170,000,000.0			$ 175,000,000.0
Letters of Credit \| 2020 Credit Agreement \| Line of Credit \| BMO Harris Bank
Debt Instrument [Line Items]
Maximum borrowing capacity					75,000,000
Bridge Loan \| 2020 Credit Agreement \| Line of Credit \| BMO Harris Bank
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 10,000,000
Secured Debt \| Unsecured Debt \| BMO Harris Bank \| Junior Lien
Debt Instrument [Line Items]
Total net leverage ratio (maximum)					3.50

TUTOR PERINI CORP 10-Q