Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Revenue	$ 8,218,180	$ 8,037,374	$ 6,545,791
Cost of revenue	7,796,321	7,570,672	6,115,520
Gross profit	421,859	466,702	430,271
Equity in earnings of joint ventures	48,650	44,819	20,987
General and administrative expenses	(80,903)	(90,298)	(110,463)
Goodwill impairment	(336,000)
Income from operations	53,606	421,223	340,795
Other income	8,973	3,368	10,250
Interest expense, net	(45,096)	(40,411)	(9,928)
Income from continuing operations before income tax expense	17,483	384,180	341,117
Income tax expense	74,416	100,090	91,696
(Loss) income from continuing operations	(56,933)	284,090	249,421
Discontinued operations, net of tax			(77)
Net (loss) income	(56,933)	284,090	249,344
Noncontrolling interests in income of consolidated subsidiaries, net of tax	(1,634)	(8,290)	(12,457)
Net (loss) income attributable to AECOM	(58,567)	275,800	236,887
Net (loss) income allocation:
Preferred stock dividend		2	127
Net (loss) income attributable to common stockholders	(58,567)	275,798	236,760
Net (loss) income attributable to AECOM	$ (58,567)	$ 275,800	$ 236,887
Net (loss) income attributable to AECOM per share:
Basic (in dollars per share)	$ (0.52)	$ 2.35	$ 2.07
Diluted (in dollars per share)	$ (0.52)	$ 2.33	$ 2.05
Weighted average shares outstanding:
Basic (in shares)	111,875	117,396	114,344
Diluted (in shares)	111,875	118,345	115,463