v3.26.1
Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Statement of Comprehensive Income [Abstract]        
Net (loss) income $ (82,888) $ 159,737 $ 200,912 $ 498,481
Other comprehensive (loss) income, net of tax:        
Net unrealized gain (loss) on derivatives, net of tax 1,093 (3,769) 1,350 (1,816)
Foreign currency translation adjustments 13,957 85,389 4,222 14,394
Pension adjustments, net of tax (1,968) (13,263) 4,162 (4,868)
Other comprehensive income, net of tax 13,082 68,357 9,734 7,710
Comprehensive (loss) income, net of tax (69,806) 228,094 210,646 506,191
Noncontrolling interests in comprehensive income of consolidated subsidiaries, net of tax (3,913) (28,862) (33,200) (56,979)
Comprehensive (loss) income attributable to AECOM, net of tax $ (73,719) $ 199,232 $ 177,446 $ 449,212