v3.26.3
Acquisitions - Aggregate Consideration Paid or Payable and Allocation of Net Assets (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Business Combination [Line Items]    
Goodwill $ 8,081,610 $ 7,317,228
Acquisitions 2026    
Business Combination [Line Items]    
Cash paid or payable 1,290,506  
Value of Quanta common stock issued 299,555  
Contingent consideration 209,605  
Fair value of total consideration transferred or estimated to be transferred 1,799,666  
Cash and cash equivalents 219,797  
Accounts receivable 611,942  
Contract assets 57,405  
Inventories 815  
Prepaid expenses and other current assets 22,278  
Property and equipment 67,369  
Operating lease right-of-use assets 38,316  
Other assets 36,799  
Identifiable intangible assets 772,233  
Current portion of operating lease liabilities (6,306)  
Accounts payable and accrued expenses (364,364)  
Contract liabilities (294,225)  
Operating lease liabilities, net of current portion (32,010)  
Deferred income taxes (25,401)  
Insurance and other non-current liabilities (192)  
Total identifiable net assets 1,104,456  
Goodwill 695,210  
Fair value of net assets acquired $ 1,799,666