v3.26.1
Joint Ventures and Variable Interest Entities - Schedule of Financial Information of Consolidated Joint Ventures (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Joint Ventures and Variable Interest Entities [Line Items]            
Current assets $ 6,349,916   $ 6,730,227      
TOTAL ASSETS 12,026,900   12,200,249      
Current liabilities 6,009,650   5,928,816      
TOTAL LIABILITIES 9,627,495   9,504,065      
Total AECOM deficit 2,193,260   2,492,584      
Noncontrolling interests 206,145   203,600      
Total owners’ equity 2,399,405 $ 2,475,428 2,696,184 $ 2,698,605 $ 2,466,287 $ 2,370,410
Total liabilities and owners’ equity 12,026,900   12,200,249      
Consolidated Joint Ventures            
Joint Ventures and Variable Interest Entities [Line Items]            
Current assets 840,000   699,000      
Non-current assets 82,200   84,400      
TOTAL ASSETS 922,200   783,400      
Current liabilities 725,100   591,400      
Non-current liabilities 5,000   5,700      
TOTAL LIABILITIES 730,100   597,100      
Total AECOM deficit (17,000)   (15,900)      
Noncontrolling interests 209,100   202,200      
Total owners’ equity 192,100   186,300      
Total liabilities and owners’ equity $ 922,200   $ 783,400