$ACM
AECOM Stock $acm

$acm Overview Financials Valuation SEC Filings Company Website

2012 Form 10-K Financial Statement

#000104746912010679 Filed on November 19, 2012

Income Statement

Concept	2012	2011 Q3	2011 Q2
Revenue	$8.218B	$2.118B	$2.047B
YoY Change	2.25%	15.83%	25.17%
Cost Of Revenue	$7.796B	$1.978B	$1.926B
YoY Change	2.98%	16.04%	26.67%
Gross Profit	$421.9M	$140.4M	$121.2M
YoY Change	-9.61%	12.95%	5.3%
Gross Profit Margin	5.13%	6.63%	5.92%
Selling, General & Admin	$85.00M	$19.90M	$23.60M
YoY Change	-5.56%	-38.58%	-16.61%
% of Gross Profit	20.15%	14.17%	19.47%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$103.0M	$25.10M	$28.00M
YoY Change	-6.65%	18.4%	62.79%
% of Gross Profit	24.41%	17.88%	23.1%
Operating Expenses	$86.00M	$19.80M	$23.50M
YoY Change	-4.44%	-38.89%	-16.96%
Operating Profit	$53.61M	$133.6M	$110.0M
YoY Change	-87.27%	45.38%	26.73%
Interest Expense	$46.73M	$10.10M	$10.40M
YoY Change	11.12%	461.11%	116.67%
% of Operating Profit	87.17%	7.56%	9.45%
Other Income/Expense, Net	$10.60M	$1.300M	-$1.700M
YoY Change	111.72%	-81.43%	466.67%
Pretax Income	$17.48M	$124.8M	$97.90M
YoY Change	-95.45%	23.93%	7.23%
Income Tax	$74.42M	$36.40M	$23.90M
% Of Pretax Income	425.65%	29.17%	24.41%
Net Earnings	-$58.57M	$87.40M	$73.80M
YoY Change	-121.24%	28.91%	13.89%
Net Earnings / Revenue	-0.71%	4.13%	3.61%
Basic Earnings Per Share	-$0.52	$0.75	$0.63
Diluted Earnings Per Share	-$0.52	$0.75	$0.62
COMMON SHARES
Basic Shares Outstanding	111.9M shares	116.4M shares	117.9M shares
Diluted Shares Outstanding	111.9M shares	117.1M shares	118.9M shares

Balance Sheet

Concept	2012	2011 Q3	2011 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$594.0M	$457.0M	$381.0M
YoY Change	29.98%	-25.45%	29.59%
Cash & Equivalents	$594.0M	$456.9M	$381.0M
Short-Term Investments
Other Short-Term Assets	$158.0M	$100.6M	$130.0M
YoY Change	46.3%	-38.67%	-28.18%
Inventory
Prepaid Expenses
Receivables	$2.396B	$2.380B	$2.474B
Other Receivables	$0.00	$45.00M	$107.0M
Total Short-Term Assets	$3.147B	$2.990B	$3.092B
YoY Change	5.25%	1.5%	30.03%
LONG-TERM ASSETS
Property, Plant & Equipment	$326.0M	$323.8M	$303.0M
YoY Change	0.62%	25.03%	34.07%
Goodwill		$2.086B
YoY Change		23.42%
Intangibles
YoY Change
Long-Term Investments	$91.00M	$71.00M	$84.00M
YoY Change	28.17%	33.96%	154.55%
Other Assets	$228.0M	$115.9M	$158.0M
YoY Change	14.57%	-37.36%	4.64%
Total Long-Term Assets	$2.518B	$2.799B	$2.795B
YoY Change	-10.04%	21.87%	72.32%
TOTAL ASSETS
Total Short-Term Assets	$3.147B	$2.990B	$3.092B
Total Long-Term Assets	$2.518B	$2.799B	$2.795B
Total Assets	$5.665B	$5.789B	$5.887B
YoY Change	-2.14%	10.42%	47.18%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$761.0M	$679.1M	$596.0M
YoY Change	12.08%	15.3%	49.75%
Accrued Expenses	$822.0M	$792.7M	$828.0M
YoY Change	3.66%	-12.22%	2.6%
Deferred Revenue
YoY Change
Short-Term Debt	$2.000M	$6.570M	$19.00M
YoY Change	-71.43%	228.5%	216.67%
Long-Term Debt Due	$161.0M	$11.00M	$12.00M
YoY Change	1363.64%	-21.43%	20.0%
Total Short-Term Liabilities	$2.078B	$1.814B	$1.818B
YoY Change	14.55%	-2.03%	16.09%
LONG-TERM LIABILITIES
Long-Term Debt	$907.0M	$1.145B	$1.165B
YoY Change	-20.79%	25.14%	569.54%
Other Long-Term Liabilities	$455.0M	$435.0M	$367.0M
YoY Change	4.6%	29.09%	50.41%
Total Long-Term Liabilities	$1.362B	$435.0M	$1.532B
YoY Change	-13.8%	-65.25%	266.51%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.078B	$1.814B	$1.818B
Total Long-Term Liabilities	$1.362B	$435.0M	$1.532B
Total Liabilities	$3.495B	$3.394B	$3.405B
YoY Change	1.3%	7.65%	67.82%
SHAREHOLDERS EQUITY
Retained Earnings		$826.9M
YoY Change
Common Stock		$1.132M
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$2.169B	$2.340B	$2.481B
YoY Change
Total Liabilities & Shareholders Equity	$5.665B	$5.789B	$5.887B
YoY Change	-2.14%	10.42%	47.18%

Cashflow Statement

Concept	2012	2011 Q3	2011 Q2
OPERATING ACTIVITIES
Net Income	-$58.57M	$87.40M	$73.80M
YoY Change	-121.24%	28.91%	13.89%
Depreciation, Depletion And Amortization	$103.0M	$25.10M	$28.00M
YoY Change	-6.65%	18.4%	62.79%
Cash From Operating Activities	$433.4M	$262.1M	$15.90M
YoY Change	228.27%	128.11%	-87.79%
INVESTING ACTIVITIES
Capital Expenditures	$62.87M	-$30.70M	-$15.20M
YoY Change	-19.38%	-7.81%	97.4%
Acquisitions	$12.57M
YoY Change	-96.56%
Other Investing Activities	-$10.90M	-$9.500M	$700.0K
YoY Change	-96.83%	-98.13%	-102.45%
Cash From Investing Activities	-$73.77M	-$40.30M	-$14.40M
YoY Change	-82.51%	-92.55%	-60.33%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$138.9M
YoY Change	63.46%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$237.6M	-129.5M	-27.00M
YoY Change	-272.86%	-117.66%	-3957.14%
NET CHANGE
Cash From Operating Activities	$433.4M	262.1M	15.90M
Cash From Investing Activities	-$73.77M	-40.30M	-14.40M
Cash From Financing Activities	-$237.6M	-129.5M	-27.00M
Net Change In Cash	$122.0M	92.30M	-25.50M
YoY Change	-180.01%	-69.93%	-126.96%
FREE CASH FLOW
Cash From Operating Activities	$433.4M	$262.1M	$15.90M
Capital Expenditures	$62.87M	-$30.70M	-$15.20M
Free Cash Flow	$370.5M	$292.8M	$31.10M
YoY Change	585.8%	97.57%	-77.45%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2011Q3	us-gaap	Stockholders Equity StockholdersEquity	2339711000	USD
CY2011Q3	us-gaap	Minority Interest MinorityInterest	55426000	USD
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.166	pure
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	4.257	pure
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	29300000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2100000	USD
CY2011Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-187574000	USD
CY2011Q3	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Amount BusinessAcquisitionPurchasePriceAllocationGoodwillAmount	405200000	USD
CY2010Q3	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Amount BusinessAcquisitionPurchasePriceAllocationGoodwillAmount	618100000	USD
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Amortizable Intangible Assets BusinessAcquisitionPurchasePriceAllocationAmortizableIntangibleAssets	1500000	USD
CY2011Q3	us-gaap	Business Acquisition Purchase Price Allocation Amortizable Intangible Assets BusinessAcquisitionPurchasePriceAllocationAmortizableIntangibleAssets	44300000	USD
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Other Noncurrent Assets BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssets	3300000	USD
CY2011Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2395137000	USD
CY2011Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5789328000	USD
CY2012Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5664568000	USD
CY2012Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2224488000	USD
CY2012Q3	us-gaap	Stockholders Equity StockholdersEquity	2169464000	USD
CY2012Q3	us-gaap	Liabilities Liabilities	3440080000	USD
CY2012Q3	us-gaap	Liabilities Current LiabilitiesCurrent	2078402000	USD
CY2011Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	323826000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	82966000	USD
CY2011Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	71124000	USD
CY2011Q3	us-gaap	Goodwill Goodwill	2086330000	USD
CY2011Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	119140000	USD
CY2011Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	115876000	USD
CY2011Q3	us-gaap	Assets Assets	5789328000	USD
CY2012Q3	us-gaap	Assets Current AssetsCurrent	3147293000	USD
CY2012Q3	us-gaap	Assets Assets	5664568000	USD
CY2012Q3	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2011Q3	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2012Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2011Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2011Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2012Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2011Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	107041003	shares
CY2012Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	107041003	shares
CY2011Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	113248337	shares
CY2011Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	113248337	shares
CY2012Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20	shares
CY2011Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20	shares
CY2012Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	3	shares
CY2012Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	3	shares
CY2011Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	3	shares
CY2011Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	3	shares
CY2011	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	8037374000	USD
CY2010	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	6545791000	USD
CY2011	us-gaap	Cost Of Services CostOfServices	7570672000	USD
CY2010	us-gaap	Cost Of Services CostOfServices	6115520000	USD
CY2011	us-gaap	Gross Profit GrossProfit	466702000	USD
CY2010	us-gaap	Gross Profit GrossProfit	430271000	USD
CY2011	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	44819000	USD
CY2010	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	20987000	USD
CY2011	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	90298000	USD
CY2010	us-gaap	Interest Expense InterestExpense	9928000	USD
CY2011	acm	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	384180000	USD
CY2010	acm	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	341117000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	100090000	USD
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	91696000	USD
CY2011	us-gaap	Profit Loss ProfitLoss	284090000	USD
CY2010	us-gaap	Profit Loss ProfitLoss	249344000	USD
CY2011	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	8290000	USD
CY2010	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	12457000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	275800000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	236887000	USD
CY2011	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	-2000	USD
CY2010	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	-127000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	275798000	USD
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	236760000	USD
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	117396000	shares
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	114344000	shares
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	118345000	shares
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	115463000	shares
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.35
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.33
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.07
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.05
CY2012	us-gaap	Net Income Loss NetIncomeLoss	-58567000	USD
CY2012	us-gaap	Profit Loss ProfitLoss	-56933000	USD
CY2012	acm	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	17483000	USD
CY2012	us-gaap	Gross Profit GrossProfit	421859000	USD
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	111875000	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	111875000	shares
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.52
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.52
CY2009Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1754405000	USD
CY2010Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2138469000	USD
CY2010	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	32142000	USD
CY2011	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-45609000	USD
CY2012	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	53895000	USD
CY2010	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	34219000	USD
CY2011	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-5556000	USD
CY2012	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	41778000	USD
CY2010	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	1131000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	248398000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	244037000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-48532000	USD
CY2010	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	79302000	USD
CY2011	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	88531000	USD
CY2012	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	18631000	USD
CY2010	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	17171000	USD
CY2011	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	167044000	USD
CY2012	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	169454000	USD
CY2010	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	10310000	USD
CY2011	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	6280000	USD
CY2012	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	4541000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	17306000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	61248000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	-350000	USD
CY2010	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	34606000	USD
CY2011	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	24937000	USD
CY2012	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	26551000	USD
CY2010	us-gaap	Minority Interest In Net Income Loss Other Minority Interests MinorityInterestInNetIncomeLossOtherMinorityInterests	-4801000	USD
CY2011	us-gaap	Minority Interest In Net Income Loss Other Minority Interests MinorityInterestInNetIncomeLossOtherMinorityInterests	20000	USD
CY2012	us-gaap	Minority Interest In Net Income Loss Other Minority Interests MinorityInterestInNetIncomeLossOtherMinorityInterests	753000	USD
CY2010	us-gaap	Minority Interest Increase From Stock Issuance MinorityInterestIncreaseFromStockIssuance	17488000	USD
CY2011	us-gaap	Minority Interest Increase From Stock Issuance MinorityInterestIncreaseFromStockIssuance	1700000	USD
CY2010	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	10976000	USD
CY2011	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	3001000	USD
CY2012	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	1283000	USD
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	110306000	USD
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	78899000	USD
CY2011	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	36628000	USD
CY2010	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	234247000	USD
CY2010	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	8319000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	24937000	USD
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	34606000	USD
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	61248000	USD
CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	17306000	USD
CY2011	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	7251000	USD
CY2010	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-11419000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	29200000	USD
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	21840000	USD
CY2011	us-gaap	Other Noncash Expense OtherNoncashExpense	3052000	USD
CY2010	us-gaap	Other Noncash Expense OtherNoncashExpense	-2335000	USD
CY2011	us-gaap	Increase Decrease In Deferred Compensation IncreaseDecreaseInDeferredCompensation	-89688000	USD
CY2011	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	89052000	USD
CY2011	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-39599000	USD
CY2010	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	17001000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	76144000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	57037000	USD
CY2011	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-67975000	USD
CY2010	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	20837000	USD
CY2011	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-58551000	USD
CY2010	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-21793000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-40456000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	19732000	USD
CY2011	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-12904000	USD
CY2010	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-25502000	USD
CY2011	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	365540000	USD
CY2010	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	559355000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	132012000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	162862000	USD
CY2011	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	2434000	USD
CY2010	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	29794000	USD
CY2011	acm	Receipts From Payments To Joint Ventures And Other Investments ReceiptsFromPaymentsToJointVenturesAndOtherInvestments	-23398000	USD
CY2010	acm	Receipts From Payments To Joint Ventures And Other Investments ReceiptsFromPaymentsToJointVenturesAndOtherInvestments	8349000	USD
CY2011	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	22683000	USD
CY2010	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	24825000	USD
CY2011	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	65261000	USD
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	77991000	USD
CY2010	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	68490000	USD
CY2011	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	2863906000	USD
CY2010	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	1985000000	USD
CY2011	us-gaap	Repayments Of Debt RepaymentsOfDebt	2640649000	USD
CY2010	us-gaap	Repayments Of Debt RepaymentsOfDebt	1234880000	USD
CY2011	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	59324000	USD
CY2011	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	59324000	USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	15020000	USD
CY2010	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	3502000	USD
CY2011	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	6280000	USD
CY2010	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	10310000	USD
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	167044000	USD
CY2010	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	17171000	USD
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	61248000	USD
CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	17306000	USD
CY2011	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-1301000	USD
CY2010	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	6512000	USD
CY2011	acm	Equity Issued To Settle Liabilities Non Cash EquityIssuedToSettleLiabilitiesNonCash	5058000	USD
CY2010	acm	Equity Issued To Settle Liabilities Non Cash EquityIssuedToSettleLiabilitiesNonCash	10500000	USD
CY2011	us-gaap	Interest Paid InterestPaid	36624000	USD
CY2010	us-gaap	Interest Paid InterestPaid	8642000	USD
CY2011	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	37991000	USD
CY2010	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	63616000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	433352000	USD
CY2009Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	290777000	USD
CY2010Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	612857000	USD
CY2012Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	593776000	USD
CY2010Q3	us-gaap	Business Acquisition Equity Interest Issued Or Issuable Value Assigned BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned	65300000	USD
CY2011Q3	us-gaap	Business Acquisition Equity Interest Issued Or Issuable Value Assigned BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned	68453000	USD
CY2012Q3	us-gaap	Business Acquisition Equity Interest Issued Or Issuable Value Assigned BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned	857000	USD
CY2012	dei	Entity Registrant Name EntityRegistrantName	AECOM TECHNOLOGY CORP
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0000868857
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-09-30
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--09-30
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	108078563	shares
CY2012Q1	dei	Entity Public Float EntityPublicFloat	2100000000	USD
CY2011Q3	acm	Cash And Cash Equivalents General CashAndCashEquivalentsGeneral	349868000	USD
CY2011Q3	acm	Cash In Consolidated Joint Ventures CashInConsolidatedJointVentures	107072000	USD
CY2011Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	456940000	USD
CY2011Q3	us-gaap	Receivables Net Current ReceivablesNetCurrent	2380181000	USD
CY2011Q3	us-gaap	Other Assets Current OtherAssetsCurrent	100575000	USD
CY2011Q3	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	45239000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	7131000	USD
CY2011Q3	us-gaap	Assets Current AssetsCurrent	2990066000	USD
CY2010	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	110463000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	421223000	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	340795000	USD
CY2011	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	3368000	USD
CY2010	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	10250000	USD
CY2011	us-gaap	Interest Expense InterestExpense	40411000	USD
CY2011Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	6570000	USD
CY2011Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	679111000	USD
CY2011Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	792690000	USD
CY2011Q3	us-gaap	Billings In Excess Of Cost BillingsInExcessOfCost	324899000	USD
CY2011Q3	us-gaap	Liabilities Current LiabilitiesCurrent	1814446000	USD
CY2011Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	435022000	USD
CY2011Q3	us-gaap	Liabilities Liabilities	3394191000	USD
CY2011Q3	us-gaap	Common Stock Value CommonStockValue	1132000	USD
CY2011Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1699207000	USD
CY2011Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	826946000	USD
CY2012	us-gaap	Fiscal Period FiscalPeriod	<table style="font-size:10pt; font-family:'Times New Roman',times,serif;"> <tr> <td><font size="2"><b><i>Fiscal Year</i></b></font><font size="2">—The Company reports results of operations based on 52 or 53-week periods ending on the Friday nearest September 30. For clarity of presentation, all periods are presented as if the year ended on September 30. Fiscal years 2012, 2011 and 2010 each contained 52 weeks and ended on September 28, September 30, and October 1, respectively</font></td></tr></table>
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<table style="font-size:10pt; font-family:'Times New Roman',times,serif;"> <tr> <td><font size="2"><b><i> Use of Estimates</i></b></font><font size="2">—The preparation of financial statements in conformity with accounting principles generally accepted in the United States (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The more significant estimates affecting amounts reported in the consolidated financial statements relate to revenues under long-term contracts and self-insurance accruals. Actual results could differ from those estimates. </font></td></tr></table>
CY2012	us-gaap	Other Cost Of Services OtherCostOfServices	3000000000	USD
CY2011	us-gaap	Other Cost Of Services OtherCostOfServices	2900000000	USD
CY2010	us-gaap	Other Cost Of Services OtherCostOfServices	2300000000	USD
CY2012	acm	Number Of Major Types Of Cost Plus Contracts NumberOfMajorTypesOfCostPlusContracts	2	item
CY2012	acm	Number Of Types Of Fixed Price Contracts NumberOfTypesOfFixedPriceContracts	2	item
CY2012	acm	Defined Benefit Pension Plan Amortization Period Of Difference Between Actual Return And Expected Return DefinedBenefitPensionPlanAmortizationPeriodOfDifferenceBetweenActualReturnAndExpectedReturn	P5Y
CY2012	acm	Defined Benefit Pension Plan Amortization Of Gains Losses Specified Percentage To Be Exceeded DefinedBenefitPensionPlanAmortizationOfGainsLossesSpecifiedPercentageToBeExceeded	0.10	pure
CY2011Q3	us-gaap	Stock Repurchase Program Authorized Amount StockRepurchaseProgramAuthorizedAmount	200000000	USD
CY2011Q3	acm	Stock Repurchased Under Accelerated Share Repurchase Agreement StockRepurchasedUnderAcceleratedShareRepurchaseAgreement	100000000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	96973000	USD
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	22500000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	18300000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	17000000	USD
CY2011Q3	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	4300000	shares
CY2012Q1	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	4800000	shares
CY2012Q1	acm	Stock Repurchased During Period Average Price Per Share StockRepurchasedDuringPeriodAveragePricePerShare	20.97
CY2012Q2	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	4400000	shares
CY2012Q2	acm	Stock Repurchased And Retired During Period Average Price Per Share StockRepurchasedAndRetiredDuringPeriodAveragePricePerShare	22.59
CY2012Q2	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	100000000	USD
CY2012	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	1	item
CY2011	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	6	item
CY2010	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	6	item
CY2011Q3	acm	Number Of Businesses Acquired Global Cost And Project Management Consultancy Firms NumberOfBusinessesAcquiredGlobalCostAndProjectManagementConsultancyFirms	4	item
CY2010Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Purchase Price BusinessAcquisitionCostOfAcquiredEntityPurchasePrice	768000000	USD
CY2011Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Purchase Price BusinessAcquisitionCostOfAcquiredEntityPurchasePrice	453300000	USD
CY2012Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Purchase Price BusinessAcquisitionCostOfAcquiredEntityPurchasePrice	15400000	USD
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Cash And Cash Equivalents BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashAndCashEquivalents	1900000	USD
CY2011Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Cash And Cash Equivalents BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashAndCashEquivalents	19300000	USD
CY2010Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Cash And Cash Equivalents BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashAndCashEquivalents	143300000	USD
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Prepaid Expense And Other Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpenseAndOtherAssets	7800000	USD
CY2011Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Prepaid Expense And Other Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpenseAndOtherAssets	149200000	USD
CY2010Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Prepaid Expense And Other Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpenseAndOtherAssets	212500000	USD
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Amount BusinessAcquisitionPurchasePriceAllocationGoodwillAmount	10500000	USD
CY2010Q3	us-gaap	Business Acquisition Purchase Price Allocation Amortizable Intangible Assets BusinessAcquisitionPurchasePriceAllocationAmortizableIntangibleAssets	63600000	USD
CY2011Q3	us-gaap	Business Acquisition Purchase Price Allocation Other Noncurrent Assets BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssets	51500000	USD
CY2010Q3	us-gaap	Business Acquisition Purchase Price Allocation Other Noncurrent Assets BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssets	33100000	USD
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Liabilities BusinessAcquisitionPurchasePriceAllocationCurrentLiabilities	8800000	USD
CY2011Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Liabilities BusinessAcquisitionPurchasePriceAllocationCurrentLiabilities	140500000	USD
CY2010Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Liabilities BusinessAcquisitionPurchasePriceAllocationCurrentLiabilities	265400000	USD
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Noncurrent Liabilities BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilities	800000	USD
CY2011Q3	us-gaap	Business Acquisition Purchase Price Allocation Noncurrent Liabilities BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilities	75700000	USD
CY2010Q3	us-gaap	Business Acquisition Purchase Price Allocation Noncurrent Liabilities BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilities	37200000	USD
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired Liabilities Assumed Net BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumedNet	15400000	USD
CY2011Q3	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired Liabilities Assumed Net BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumedNet	453300000	USD
CY2010Q3	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired Liabilities Assumed Net BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumedNet	768000000	USD
CY2012Q3	us-gaap	Acquired Finite Lived Intangible Asset Amount AcquiredFiniteLivedIntangibleAssetAmount	1500000	USD
CY2011Q3	us-gaap	Acquired Finite Lived Intangible Asset Amount AcquiredFiniteLivedIntangibleAssetAmount	44300000	USD
CY2010Q3	us-gaap	Acquired Finite Lived Intangible Asset Amount AcquiredFiniteLivedIntangibleAssetAmount	63600000	USD
CY2010Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Cash Paid BusinessAcquisitionCostOfAcquiredEntityCashPaid	702700000	USD
CY2011Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Cash Paid BusinessAcquisitionCostOfAcquiredEntityCashPaid	384800000	USD
CY2012Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Cash Paid BusinessAcquisitionCostOfAcquiredEntityCashPaid	14500000	USD
CY2010Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Equity Interests Issued And Issuable BusinessAcquisitionCostOfAcquiredEntityEquityInterestsIssuedAndIssuable	65300000	USD
CY2011Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Equity Interests Issued And Issuable BusinessAcquisitionCostOfAcquiredEntityEquityInterestsIssuedAndIssuable	68500000	USD
CY2012Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Equity Interests Issued And Issuable BusinessAcquisitionCostOfAcquiredEntityEquityInterestsIssuedAndIssuable	900000	USD
CY2012	acm	Maximum Period From Acquisition Date To Determine Final Value Of Identifiable Intangible Assets MaximumPeriodFromAcquisitionDateToDetermineFinalValueOfIdentifiableIntangibleAssets	P12M
CY2010Q3	us-gaap	Goodwill Goodwill	1690400000	USD
CY2012	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-5800000	USD
CY2011	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	12100000	USD
CY2012	us-gaap	Goodwill Translation Adjustments GoodwillTranslationAdjustments	20400000	USD
CY2011	us-gaap	Goodwill Translation Adjustments GoodwillTranslationAdjustments	-21400000	USD
CY2012	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	10500000	USD
CY2011	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	405200000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	242500000	USD
CY2011Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	242100000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	145500000	USD
CY2011Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	123000000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	15500000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	12800000	USD
CY2011	acm	Finite Lived Intangible Assets Amortization Expense Included Within Equity In Earnings Of Joint Ventures FiniteLivedIntangibleAssetsAmortizationExpenseIncludedWithinEquityInEarningsOfJointVentures	3100000	USD
CY2012	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	63300000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	94700000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-19200000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0600000	USD
CY2012	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1700000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-20303000	USD
CY2010	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	13600000	USD
CY2010	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	100000	USD
CY2010	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	200000	USD
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-77000	USD
CY2012Q3	acm	Billed Receivables Current BilledReceivablesCurrent	1207000000	USD
CY2012Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	1145100000	USD
CY2012Q3	us-gaap	Contract Receivable Retainage Due One Year Or Less ContractReceivableRetainageDueOneYearOrLess	156600000	USD
CY2012Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	2508700000	USD
CY2012Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	112800000	USD
CY2012Q3	us-gaap	Receivables Net Current ReceivablesNetCurrent	2395881000	USD
CY2011Q3	acm	Billed Receivables Current BilledReceivablesCurrent	1256300000	USD
CY2011Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	1133600000	USD
CY2011Q3	us-gaap	Contract Receivable Retainage Due One Year Or Less ContractReceivableRetainageDueOneYearOrLess	110500000	USD
CY2011Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	2500400000	USD
CY2011Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	120200000	USD
CY2012	acm	Unbilled Receivables Expected Period For Billing And Collection UnbilledReceivablesExpectedPeriodForBillingAndCollection	P12M
CY2011	acm	Unbilled Receivables Expected Period For Billing And Collection UnbilledReceivablesExpectedPeriodForBillingAndCollection	P12M
CY2012Q3	acm	Accounts Receivable Concentration Risk Minimum Percentage AccountsReceivableConcentrationRiskMinimumPercentage	0.10	pure
CY2011Q3	acm	Accounts Receivable Concentration Risk Minimum Percentage AccountsReceivableConcentrationRiskMinimumPercentage	0.10	pure
CY2012Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	676300000	USD
CY2011Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	648100000	USD
CY2012Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	350400000	USD
CY2011Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	324300000	USD
CY2012Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	325917000	USD
CY2012	us-gaap	Depreciation Depreciation	77100000	USD
CY2011	us-gaap	Depreciation Depreciation	73200000	USD
CY2010	us-gaap	Depreciation Depreciation	59300000	USD
CY2012	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	-6200000	USD
CY2011	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	-6700000	USD
CY2010	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	-5800000	USD
CY2012Q3	acm	Unamortized Capitalized Software Costs UnamortizedCapitalizedSoftwareCosts	24100000	USD
CY2011Q3	acm	Unamortized Capitalized Software Costs UnamortizedCapitalizedSoftwareCosts	20900000	USD
CY2010Q3	acm	Unamortized Capitalized Software Costs UnamortizedCapitalizedSoftwareCosts	20700000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	74416000	USD
CY2012Q3	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	1059300000	USD
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	237400000	USD
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.009	pure
CY2011	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.261	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.063	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.234	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-1.451	pure
CY2012Q3	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	201600000	USD
CY2012Q3	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	175700000	USD
CY2012Q3	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	139600000	USD
CY2012Q3	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	122100000	USD
CY2012Q3	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	100400000	USD
CY2012Q3	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	319900000	USD
CY2012Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear	162600000	USD
CY2012Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	152100000	USD
CY2012Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	151700000	USD
CY2012Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	325800000	USD
CY2012Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1600000	USD
CY2012Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	275900000	USD
CY2012	acm	Debt Instrument Covenant Actual Consolidated Leverage Ratio DebtInstrumentCovenantActualConsolidatedLeverageRatio	2.15	pure
CY2012	acm	Debt Instrument Covenant Maximum Consolidated Leverage Ratio DebtInstrumentCovenantMaximumConsolidatedLeverageRatio	3.0	pure
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	254500000	USD
CY2010	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	211300000	USD
CY2010Q4	acm	Deferred Compensation Arrangement Restricted Stock Units Settled Due To Termination Of Plan DeferredCompensationArrangementRestrictedStockUnitsSettledDueToTerminationOfPlan	6300000	shares
CY2010Q3	acm	Deferred Compensation Liability Settled Due To Termination Of Plan DeferredCompensationLiabilitySettledDueToTerminationOfPlan	88800000	USD
CY2010Q3	acm	Assets Held In Trust Current Net AssetsHeldInTrustCurrentNet	67200000	USD
CY2012	acm	Defined Contribution And Compensation Plan Compensation Expense DefinedContributionAndCompensationPlanCompensationExpense	15900000	USD
CY2011	acm	Defined Contribution And Compensation Plan Compensation Expense DefinedContributionAndCompensationPlanCompensationExpense	17200000	USD
CY2010	acm	Defined Contribution And Compensation Plan Compensation Expense DefinedContributionAndCompensationPlanCompensationExpense	15800000	USD
CY2012	acm	Effective Income Tax Rate Reconciliation Tax Credit Foreign Research And Experimentation EffectiveIncomeTaxRateReconciliationTaxCreditForeignResearchAndExperimentation	-0.333	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	-0.234	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.027	pure
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	500000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	12100000	USD
CY2011	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	58300000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	70900000	USD
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	15900000	USD
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	7200000	USD
CY2010	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	46800000	USD
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	69900000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	38500000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-8700000	USD
CY2011	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-600000	USD
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	15400000	USD
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	500000	USD
CY2010	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	5900000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	134500000	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6900000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	11100000	USD
CY2011	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-19500000	USD
CY2011	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-3400000	USD
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	119400000	USD
CY2010	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	7300000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	21100000	USD
CY2010	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-400000	USD
CY2010	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1900000	USD
CY2010	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.021	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.062	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.001	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.005	pure
CY2010	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.269	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.018	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.029	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.050	pure
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6100000	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1100000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	4100000	USD
CY2012	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-25400000	USD
CY2012	acm	Income Tax Reconciliation Tax Credit Foreign Research And Experimentation IncomeTaxReconciliationTaxCreditForeignResearchAndExperimentation	5800000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-4100000	USD
CY2012	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	500000	USD
CY2012	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	2900000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	87900000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	55700000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	50100000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	37500000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	53900000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	64400000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1800000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	351300000	USD
CY2011Q3	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	169500000	USD
CY2011Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	32300000	USD
CY2011Q3	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	29100000	USD
CY2011Q3	acm	Deferred Tax Liabilities State Taxes DeferredTaxLiabilitiesStateTaxes	3700000	USD
CY2011Q3	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	8800000	USD
CY2011Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	243400000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	17800000	USD
CY2011Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	90100000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	77600000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	57000000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	50200000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	42400000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	58700000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	86500000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	4000000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	376400000	USD
CY2012Q3	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	167800000	USD
CY2012Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	18800000	USD
CY2012Q3	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	21400000	USD
CY2012Q3	acm	Deferred Tax Liabilities State Taxes DeferredTaxLiabilitiesStateTaxes	3800000	USD
CY2012Q3	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	1600000	USD
CY2012Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	213400000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	19200000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	143800000	USD
CY2012Q3	acm	Tax Credit Carryforward Amount Federal Research And Development TaxCreditCarryforwardAmountFederalResearchAndDevelopment	12700000	USD
CY2012Q3	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	11500000	USD
CY2012	acm	Undistributed Earnings From Foreign Subsidiaries UndistributedEarningsFromForeignSubsidiaries	797400000	USD
CY2012Q3	acm	Unrecognized Tax Benefits And Potential Income Tax Penalties And Interest Net Of Related Tax Benefit UnrecognizedTaxBenefitsAndPotentialIncomeTaxPenaltiesAndInterestNetOfRelatedTaxBenefit	56300000	USD
CY2012Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	50800000	USD
CY2012Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	55800000	USD
CY2010Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	70500000	USD
CY2011Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	58100000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	5300000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	3700000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	13700000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	4400000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	-2900000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	-5200000	USD
CY2012	acm	Unrecognized Tax Benefits Increases Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromCurrentPeriodTaxPositions	4900000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	6000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1300000	USD
CY2012Q3	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	9600000	USD
CY2012Q3	acm	Tax Credit Carryforward Amount California Enterprise Zone Tax Credits TaxCreditCarryforwardAmountCaliforniaEnterpriseZoneTaxCredits	2000000	USD
CY2011	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	900000	shares
CY2010	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1200000	shares
CY2011	acm	Gross Profit As Percentage Of Sales Revenue Services Net GrossProfitAsPercentageOfSalesRevenueServicesNet	0.058	pure
CY2011	acm	Gross Profit As Percentage Of Sales Revenue Services Net Of Other Direct Costs GrossProfitAsPercentageOfSalesRevenueServicesNetOfOtherDirectCosts	0.090	pure
CY2010Q3	us-gaap	Assets Assets	5242900000	USD
CY2010	acm	Gross Profit As Percentage Of Sales Revenue Services Net GrossProfitAsPercentageOfSalesRevenueServicesNet	0.066	pure
CY2010	acm	Gross Profit As Percentage Of Sales Revenue Services Net Of Other Direct Costs GrossProfitAsPercentageOfSalesRevenueServicesNetOfOtherDirectCosts	0.102	pure
CY2012	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	8218180000	USD
CY2012	acm	Sales Revenue Services Net Of Other Direct Costs SalesRevenueServicesNetOfOtherDirectCosts	5183900000	USD
CY2012	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	48650000	USD
CY2012	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	80903000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	53606000	USD
CY2012	acm	Gross Profit As Percentage Of Sales Revenue Services Net GrossProfitAsPercentageOfSalesRevenueServicesNet	0.051	pure
CY2012	acm	Gross Profit As Percentage Of Sales Revenue Services Net Of Other Direct Costs GrossProfitAsPercentageOfSalesRevenueServicesNetOfOtherDirectCosts	0.081	pure
CY2011Q3	us-gaap	Noncurrent Assets NoncurrentAssets	2716300000	USD
CY2010Q3	us-gaap	Noncurrent Assets NoncurrentAssets	2191400000	USD
CY2012Q3	us-gaap	Noncurrent Assets NoncurrentAssets	2390300000	USD
CY2010Q4	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	1936200000	USD
CY2010Q4	us-gaap	Cost Of Services CostOfServices	1830900000	USD
CY2010Q4	us-gaap	Gross Profit GrossProfit	105300000	USD
CY2010Q4	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	8100000	USD
CY2010Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	23200000	USD
CY2010Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	90200000	USD
CY2010Q4	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	2300000	USD
CY2010Q4	us-gaap	Interest Expense InterestExpense	9900000	USD
CY2010Q4	acm	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	82600000	USD
CY2010Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20500000	USD
CY2010Q4	us-gaap	Profit Loss ProfitLoss	62100000	USD
CY2010Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5200000	USD
CY2010Q4	us-gaap	Net Income Loss NetIncomeLoss	56900000	USD
CY2010Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.48
CY2010Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
CY2010Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	118000000	shares
CY2010Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	119100000	shares
CY2011Q1	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	1936400000	USD
CY2011Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	110000000	USD
CY2011Q2	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	2046700000	USD
CY2011Q3	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	2118100000	USD
CY2011Q1	us-gaap	Cost Of Services CostOfServices	1836600000	USD
CY2011Q2	us-gaap	Cost Of Services CostOfServices	1925500000	USD
CY2011Q3	us-gaap	Cost Of Services CostOfServices	1977700000	USD
CY2011Q1	us-gaap	Gross Profit GrossProfit	99800000	USD
CY2011Q2	us-gaap	Gross Profit GrossProfit	121200000	USD
CY2011Q3	us-gaap	Gross Profit GrossProfit	140400000	USD
CY2011Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	11300000	USD
CY2011Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	12300000	USD
CY2011Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	13100000	USD
CY2011Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	23700000	USD
CY2011Q2	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	23500000	USD
CY2011Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	19900000	USD
CY2011Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	87400000	USD
CY2011Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	133600000	USD
CY2011Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1500000	USD
CY2011Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1700000	USD
CY2011Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1300000	USD
CY2011Q1	us-gaap	Interest Expense InterestExpense	10000000	USD
CY2011Q2	us-gaap	Interest Expense InterestExpense	10400000	USD
CY2011Q3	us-gaap	Interest Expense InterestExpense	10100000	USD
CY2011Q1	acm	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	78900000	USD
CY2011Q2	acm	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	97900000	USD
CY2011Q3	acm	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	124800000	USD
CY2011Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19300000	USD
CY2011Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23900000	USD
CY2011Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36400000	USD
CY2011Q1	us-gaap	Profit Loss ProfitLoss	59600000	USD
CY2011Q2	us-gaap	Profit Loss ProfitLoss	74000000	USD
CY2011Q3	us-gaap	Profit Loss ProfitLoss	88400000	USD
CY2011Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1900000	USD
CY2011Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	200000	USD
CY2011Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1000000	USD
CY2011Q1	us-gaap	Net Income Loss NetIncomeLoss	57700000	USD
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	73800000	USD
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	87400000	USD
CY2011Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
CY2011Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.63
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.75
CY2011Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.49
CY2011Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.62
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.75
CY2011Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	117300000	shares
CY2011Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	117900000	shares
CY2011Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	116400000	shares
CY2011Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	118300000	shares
CY2011Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	118900000	shares
CY2011Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	117100000	shares
CY2011Q4	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	2029200000	USD
CY2012Q1	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	2010900000	USD
CY2012Q2	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	2095200000	USD
CY2012Q3	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	2082900000	USD
CY2011Q4	us-gaap	Cost Of Services CostOfServices	1938900000	USD
CY2012Q1	us-gaap	Cost Of Services CostOfServices	1934700000	USD
CY2012Q2	us-gaap	Cost Of Services CostOfServices	1984000000	USD
CY2012Q3	us-gaap	Cost Of Services CostOfServices	1938700000	USD
CY2011Q4	us-gaap	Gross Profit GrossProfit	90300000	USD
CY2012Q1	us-gaap	Gross Profit GrossProfit	76200000	USD
CY2012Q2	us-gaap	Gross Profit GrossProfit	111200000	USD
CY2012Q3	us-gaap	Gross Profit GrossProfit	144200000	USD
CY2011Q4	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	9000000	USD
CY2012Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	16900000	USD
CY2012Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	12300000	USD
CY2012Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	10400000	USD
CY2011Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	22600000	USD
CY2012Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	19900000	USD
CY2012Q2	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	20700000	USD
CY2012Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	17700000	USD
CY2011Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	76700000	USD
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	73200000	USD
CY2012Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	102800000	USD
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-199100000	USD
CY2011Q4	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1900000	USD
CY2012Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	4400000	USD
CY2012Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1100000	USD
CY2012Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1600000	USD
CY2011Q4	us-gaap	Interest Expense InterestExpense	10600000	USD
CY2012Q1	us-gaap	Interest Expense InterestExpense	11200000	USD
CY2012Q2	us-gaap	Interest Expense InterestExpense	12700000	USD
CY2012Q3	us-gaap	Interest Expense InterestExpense	10600000	USD
CY2011Q4	acm	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	68000000	USD
CY2012Q1	acm	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	66400000	USD
CY2012Q2	acm	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	91200000	USD
CY2012Q3	acm	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	-208100000	USD
CY2011Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19600000	USD
CY2012Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16700000	USD
CY2012Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	21400000	USD
CY2012Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16700000	USD
CY2011Q4	us-gaap	Profit Loss ProfitLoss	48400000	USD
CY2012Q1	us-gaap	Profit Loss ProfitLoss	49700000	USD
CY2012Q2	us-gaap	Profit Loss ProfitLoss	69800000	USD
CY2012Q3	us-gaap	Profit Loss ProfitLoss	-224800000	USD
CY2011Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	500000	USD
CY2012Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	700000	USD
CY2012Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	400000	USD
CY2011Q4	us-gaap	Net Income Loss NetIncomeLoss	47900000	USD
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	49000000	USD
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	69400000	USD
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	-224900000	USD
CY2011Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.42
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.43
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.63
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.05
CY2011Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.42
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.43
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.63
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.05
CY2011Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	114000000	shares
CY2012Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	113400000	shares
CY2012Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	110200000	shares
CY2012Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	110000000	shares
CY2011Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	114600000	shares
CY2012Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	114300000	shares
CY2012Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	110800000	shares
CY2012Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	110000000	shares
CY2012Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	415200000	USD
CY2012Q3	acm	Accrued Contract Costs Current AccruedContractCostsCurrent	333400000	USD
CY2012Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	73100000	USD
CY2012Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	821663000	USD
CY2011Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	417300000	USD
CY2011Q3	acm	Accrued Contract Costs Current AccruedContractCostsCurrent	320200000	USD
CY2011Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	55200000	USD
CY2012Q3	acm	Accrued Contract Costs Related To Professional Liability Current AccruedContractCostsRelatedToProfessionalLiabilityCurrent	117800000	USD
CY2011Q3	acm	Accrued Contract Costs Related To Professional Liability Current AccruedContractCostsRelatedToProfessionalLiabilityCurrent	118400000	USD
CY2012Q3	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	192200000	USD
CY2012Q3	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	56300000	USD
CY2012Q3	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	206000000	USD
CY2012Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	454537000	USD
CY2011Q3	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	166500000	USD
CY2011Q3	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	61100000	USD
CY2011Q3	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	207400000	USD
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	2700000	USD
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	178200000	USD
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-179173000	USD
CY2011Q3	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-51100000	USD
CY2011Q3	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	136500000	USD
CY2011	acm	Unrecognized Tax Benefits Increases Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromCurrentPeriodTaxPositions	4900000	USD
CY2012Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	100000	USD
CY2011Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	100000	USD
CY2011Q3	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	10500000	USD
CY2012Q3	acm	Cash In Consolidated Joint Ventures CashInConsolidatedJointVentures	136793000	USD
CY2012Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	1641000	USD
CY2012Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	600000	USD
CY2012Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	6700000	USD
CY2011Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	800000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	11600000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	21800000	USD
CY2012	acm	Reporting Segments Number ReportingSegmentsNumber	2	segment
CY2011	acm	Sales Revenue Services Net Of Other Direct Costs SalesRevenueServicesNetOfOtherDirectCosts	5180800000	USD
CY2010	acm	Sales Revenue Services Net Of Other Direct Costs SalesRevenueServicesNetOfOtherDirectCosts	4205800000	USD
CY2012	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	336000000	USD
CY2012	acm	Fiscal Year Period FiscalYearPeriod	P364D
CY2011	acm	Fiscal Year Period FiscalYearPeriod	P364D
CY2010	acm	Fiscal Year Period FiscalYearPeriod	P364D
CY2012	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-56933000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	284090000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	249421000	USD
CY2010	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-4227000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	132012000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	158635000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-421917000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-614527000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-73773000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	137460000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	770579000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-237614000	USD
CY2011	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-3472000	USD
CY2010	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	7393000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-155917000	USD
CY2012Q3	us-gaap	Other Assets Current OtherAssetsCurrent	140764000	USD
CY2012	acm	Receivables Sold Amount ReceivablesSoldAmount	31200000	USD
CY2011Q3	us-gaap	Debt Current DebtCurrent	17800000	USD
CY2012Q3	us-gaap	Debt Current DebtCurrent	162600000	USD
CY2012Q3	acm	Cash And Cash Equivalents General CashAndCashEquivalentsGeneral	456983000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	16872000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	126948000	USD
CY2012Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	91049000	USD
CY2012Q3	us-gaap	Goodwill Goodwill	1775352000	USD
CY2012Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	101036000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	322080000	USD
CY2012Q3	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	1.00
CY2011Q3	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	1.00
CY2011Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	11176000	USD
CY2012Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	160950000	USD
CY2011Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1144723000	USD
CY2012Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	907141000	USD
CY2011Q3	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	1162500000	USD
CY2012Q3	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	1069700000	USD
CY2012Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	761211000	USD
CY2012Q3	us-gaap	Billings In Excess Of Cost BillingsInExcessOfCost	320296000	USD
CY2012Q3	us-gaap	Common Stock Value CommonStockValue	1070000	USD
CY2012Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1741478000	USD
CY2012Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	606089000	USD
CY2012Q3	us-gaap	Minority Interest MinorityInterest	55024000	USD
CY2012	us-gaap	Cost Of Services CostOfServices	7796321000	USD
CY2012	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	8973000	USD
CY2012	us-gaap	Interest Expense InterestExpense	45096000	USD
CY2012	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1634000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-58567000	USD
CY2012	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	-3716000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	102974000	USD
CY2012	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	26401000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	26551000	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	1254000	USD
CY2012	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-9735000	USD
CY2012	us-gaap	Other Noncash Expense OtherNoncashExpense	-5286000	USD
CY2012	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	21544000	USD
CY2012	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-11363000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	80999000	USD
CY2012	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	14682000	USD
CY2012	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-5376000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-28180000	USD
CY2012	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	12173000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	433352000	USD
CY2012	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	12571000	USD
CY2012	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	2647000	USD
CY2012	acm	Receipts From Payments To Joint Ventures And Other Investments ReceiptsFromPaymentsToJointVenturesAndOtherInvestments	-2846000	USD
CY2012	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	87000	USD
CY2012	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	1958000	USD
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	62874000	USD
CY2012	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	1454861000	USD
CY2012	us-gaap	Repayments Of Debt RepaymentsOfDebt	1550996000	USD
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	13760000	USD
CY2012	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	4541000	USD
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	159751000	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1254000	USD
CY2012	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-1283000	USD
CY2012	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	14871000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	136836000	USD
CY2012	acm	Equity Issued To Settle Liabilities Non Cash EquityIssuedToSettleLiabilitiesNonCash	4016000	USD
CY2012	us-gaap	Interest Paid InterestPaid	39044000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	167300000	USD
CY2012	acm	Finite Lived Intangible Assets Amortization Expense Included Within Equity In Earnings Of Joint Ventures FiniteLivedIntangibleAssetsAmortizationExpenseIncludedWithinEquityInEarningsOfJointVentures	1000000	USD
CY2012Q3	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	12641000	USD
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-3700000	USD

Files In Submission

Name	View Source	Status
0001047469-12-010679-index-headers.html	Edgar Link	pending
0001047469-12-010679-index.html	Edgar Link	pending
0001047469-12-010679.txt	Edgar Link	pending
0001047469-12-010679-xbrl.zip	Edgar Link	pending
a2211878z10-k.htm	Edgar Link	pending
a2211878zex-21_1.htm	Edgar Link	pending
a2211878zex-23_1.htm	Edgar Link	pending
a2211878zex-31_1.htm	Edgar Link	pending
a2211878zex-31_2.htm	Edgar Link	pending
a2211878zex-32.htm	Edgar Link	pending
acm-20120930.xml	Edgar Link	completed
acm-20120930.xsd	Edgar Link	pending
acm-20120930_cal.xml	Edgar Link	unprocessable
acm-20120930_def.xml	Edgar Link	unprocessable
acm-20120930_lab.xml	Edgar Link	unprocessable
acm-20120930_pre.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
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$ACM
AECOM Stock $acm

2012 Form 10-K Financial Statement

#000104746912010679 Filed on November 19, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ACM AECOM Stock $acm

2012 Form 10-K Financial Statement

#000104746912010679 Filed on November 19, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ACM
AECOM Stock $acm