$ACM
AECOM Stock $acm

$acm Overview Financials Valuation SEC Filings Company Website

2013 Q4 Form 10-K Financial Statement

#000104746913010484 Filed on November 13, 2013

Income Statement

Concept	2013 Q4	2013 Q3	2013 Q2
Revenue	$1.954B	$2.079B	$2.067B
YoY Change	-3.14%	-0.18%	-1.32%
Cost Of Revenue	$1.876B	$1.939B	$1.936B
YoY Change	-3.27%	0.01%	-2.44%
Gross Profit	$78.20M	$140.2M	$131.8M
YoY Change	0.1%	-2.77%	18.54%
Gross Profit Margin	4.0%	6.74%	6.38%
Selling, General & Admin	$21.60M	$32.60M	$20.00M
YoY Change	-2.26%	69.79%	-3.85%
% of Gross Profit	27.62%	23.25%	15.17%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$22.20M	$23.00M	$23.60M
YoY Change	-7.13%	-11.88%	-9.58%
% of Gross Profit	28.39%	16.41%	17.9%
Operating Expenses	$21.60M	$32.60M	$20.00M
YoY Change	-1.82%	70.68%	-3.85%
Operating Profit	$90.44M	$122.7M	$111.9M
YoY Change	46.03%	-161.63%	8.85%
Interest Expense	$23.50M	$10.20M	$11.70M
YoY Change	115.6%	-7.27%	-10.69%
% of Operating Profit	25.99%	8.31%	10.46%
Other Income/Expense, Net	$17.00K	$1.500M	$1.215M
YoY Change	-97.47%	-25.0%	-19.0%
Pretax Income	$80.03M	$114.0M	$101.4M
YoY Change	54.85%	-154.78%	11.18%
Income Tax	$23.50M	$35.80M	$30.18M
% Of Pretax Income	29.37%	31.4%	29.76%
Net Earnings	$56.40M	$76.50M	$70.76M
YoY Change	47.99%	-134.02%	1.95%
Net Earnings / Revenue	2.89%	3.68%	3.42%
Basic Earnings Per Share	$0.59	$0.78	$0.71
Diluted Earnings Per Share	$0.58	$0.77	$0.70
COMMON SHARES
Basic Shares Outstanding	98.20M shares	98.00M shares	99.26M shares
Diluted Shares Outstanding	97.59M shares	99.70M shares	100.8M shares

Balance Sheet

Concept	2013 Q4	2013 Q3	2013 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$683.0M	$602.0M	$513.0M
YoY Change	15.57%	1.35%	28.89%
Cash & Equivalents	$681.7M	$600.7M	$507.6M
Short-Term Investments	$2.000M	$2.000M	$5.000M
Other Short-Term Assets	$126.9M	$168.7M	$169.2M
YoY Change	-18.97%	19.86%	11.34%
Inventory
Prepaid Expenses
Receivables	$2.410B	$2.342B	$2.341B
Other Receivables	$10.00M	$0.00	$0.00
Total Short-Term Assets	$3.249B	$3.132B	$3.050B
YoY Change	-0.3%	-0.5%	0.09%
LONG-TERM ASSETS
Property, Plant & Equipment	$275.9M	$270.7M	$270.3M
YoY Change	-14.51%	-16.95%	-17.07%
Goodwill	$1.885B	$1.812B	$1.797B
YoY Change	3.73%	2.05%	-14.81%
Intangibles
YoY Change
Long-Term Investments	$53.00M	$106.0M	$84.00M
YoY Change	-38.37%	16.48%	0.0%
Other Assets	$165.0M	$118.5M	$132.7M
YoY Change	56.31%	17.33%	-31.97%
Total Long-Term Assets	$2.589B	$2.534B	$2.490B
YoY Change	1.53%	0.67%	-11.62%
TOTAL ASSETS
Total Short-Term Assets	$3.249B	$3.132B	$3.050B
Total Long-Term Assets	$2.589B	$2.534B	$2.490B
Total Assets	$5.837B	$5.666B	$5.539B
YoY Change	0.51%	0.02%	-5.54%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$803.8M	$725.4M	$711.2M
YoY Change	15.04%	-4.71%	-3.76%
Accrued Expenses	$904.5M	$915.3M	$890.1M
YoY Change	-2.44%	11.39%	13.68%
Deferred Revenue
YoY Change
Short-Term Debt	$33.52M	$29.58M	$12.02M
YoY Change	82.13%	1702.44%	300.8%
Long-Term Debt Due	$57.00M	$55.00M	$1.000M
YoY Change	-70.47%	-65.84%	-99.15%
Total Short-Term Liabilities	$2.160B	$2.054B	$1.942B
YoY Change	-3.29%	-1.2%	-3.16%
LONG-TERM LIABILITIES
Long-Term Debt	$1.113B	$1.089B	$1.135B
YoY Change	8.9%	20.07%	19.35%
Other Long-Term Liabilities	$441.3M	$448.9M	$420.7M
YoY Change	-0.38%	-1.24%	6.24%
Total Long-Term Liabilities	$441.3M	$448.9M	$420.7M
YoY Change	-0.38%	-1.24%	-68.77%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.160B	$2.054B	$1.942B
Total Long-Term Liabilities	$441.3M	$448.9M	$420.7M
Total Liabilities	$3.714B	$3.592B	$3.498B
YoY Change	0.45%	4.4%	2.63%
SHAREHOLDERS EQUITY
Retained Earnings	$503.7M	$472.2M	$457.2M
YoY Change	6.9%	-22.1%
Common Stock	$958.0K	$960.0K	$976.0K
YoY Change	-5.05%	-10.28%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$2.036B	$2.021B	$1.986B
YoY Change
Total Liabilities & Shareholders Equity	$5.837B	$5.666B	$5.539B
YoY Change	0.51%	0.02%	-5.54%

Cashflow Statement

Concept	2013 Q4	2013 Q3	2013 Q2
OPERATING ACTIVITIES
Net Income	$56.40M	$76.50M	$70.76M
YoY Change	47.99%	-134.02%	1.95%
Depreciation, Depletion And Amortization	$22.20M	$23.00M	$23.60M
YoY Change	-7.13%	-11.88%	-9.58%
Cash From Operating Activities	$137.4M	$160.1M	$96.20M
YoY Change	104.77%	-29.28%	-52.38%
INVESTING ACTIVITIES
Capital Expenditures	$20.77M	-$15.00M	-$12.50M
YoY Change	60.7%	-0.66%	-19.87%
Acquisitions	$659.0K
YoY Change	-98.42%
Other Investing Activities	$200.0K	-$14.80M	-$15.20M
YoY Change	-100.51%	-149.01%	-55.81%
Cash From Investing Activities	-$20.50M	-$29.80M	-$27.70M
YoY Change	-60.73%	-297.35%	-44.6%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$26.34M
YoY Change	-84.06%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-33.30M	-42.10M	-180.9M
YoY Change	97.04%	-20.42%	-16.79%
NET CHANGE
Cash From Operating Activities	137.4M	160.1M	96.20M
Cash From Investing Activities	-20.50M	-29.80M	-27.70M
Cash From Financing Activities	-33.30M	-42.10M	-180.9M
Net Change In Cash	83.60M	88.20M	-112.4M
YoY Change	-4280.0%	-53.23%	71.87%
FREE CASH FLOW
Cash From Operating Activities	$137.4M	$160.1M	$96.20M
Capital Expenditures	$20.77M	-$15.00M	-$12.50M
Free Cash Flow	$116.6M	$175.1M	$108.7M
YoY Change	115.28%	-27.49%	-50.05%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013	acm	Fiscal Year Period FiscalYearPeriod	P364D
CY2011	acm	Fiscal Year Period FiscalYearPeriod	P364D
CY2012	acm	Fiscal Year Period FiscalYearPeriod	P364D
CY2013	us-gaap	Fiscal Period FiscalPeriod	<div style="font-size:10.0pt;font-family:Times New Roman;"> <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 2013, 2012 and 2011 each contained 52 weeks and ended on September 27, September 28, and September 30, respectively.</font> </div>
CY2013	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-size:10.0pt;font-family:Times New Roman;"> <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> </div>
CY2013Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	86400000	USD
CY2013	acm	Maximum Period From Acquisition Date To Determine Final Value Of Identifiable Intangible Assets MaximumPeriodFromAcquisitionDateToDetermineFinalValueOfIdentifiableIntangibleAssets	P12M
CY2011	us-gaap	Other Cost Of Services OtherCostOfServices	2900000000	USD
CY2012	us-gaap	Other Cost Of Services OtherCostOfServices	3000000000	USD
CY2013	us-gaap	Other Cost Of Services OtherCostOfServices	3200000000	USD
CY2013	acm	Number Of Major Types Of Cost Plus Contracts NumberOfMajorTypesOfCostPlusContracts	2	item
CY2013	acm	Number Of Types Of Fixed Price Contracts NumberOfTypesOfFixedPriceContracts	2	item
CY2013	acm	Defined Benefit Pension Plan Amortization Of Gains Losses Specified Percentage To Be Exceeded DefinedBenefitPensionPlanAmortizationOfGainsLossesSpecifiedPercentageToBeExceeded	0.10	pure
CY2013	acm	Defined Benefit Pension Plan Amortization Period Of Difference Between Actual Return And Expected Return DefinedBenefitPensionPlanAmortizationPeriodOfDifferenceBetweenActualReturnAndExpectedReturn	P5Y
	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	26600000	shares
	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	23.88
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	635300000	USD
CY2013	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount	364700000	USD
CY2013Q4	acm	Stock Repurchased And Settled In Next Fiscal Quarter StockRepurchasedAndSettledInNextFiscalQuarter	100000	shares
CY2013Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	249800000	USD
CY2013Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	166700000	USD
CY2013Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	83149000	USD
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	22500000	USD
CY2013	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	21200000	USD
CY2013Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	84300000	USD
CY2013Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	15800000	USD
CY2013Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	13100000	USD
CY2013Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	11900000	USD
CY2013Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	8500000	USD
CY2013Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	15100000	USD
CY2012	acm	Finite Lived Intangible Assets Amortization Expense Included Within Equity In Earnings Of Joint Ventures FiniteLivedIntangibleAssetsAmortizationExpenseIncludedWithinEquityInEarningsOfJointVentures	1000000	USD
CY2013	acm	Finite Lived Intangible Assets Amortization Expense Included Within Equity In Earnings Of Joint Ventures FiniteLivedIntangibleAssetsAmortizationExpenseIncludedWithinEquityInEarningsOfJointVentures	200000	USD
CY2013Q3	acm	Billed Receivables Current BilledReceivablesCurrent	1177600000	USD
CY2013Q3	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	1076800000	USD
CY2013Q3	us-gaap	Contract Receivable Retainage Due One Year Or Less ContractReceivableRetainageDueOneYearOrLess	174300000	USD
CY2013Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	2428700000	USD
CY2013Q3	us-gaap	Receivables Net Current ReceivablesNetCurrent	2342262000	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
CY2013	acm	Unbilled Receivables Expected Period For Billing And Collection UnbilledReceivablesExpectedPeriodForBillingAndCollection	P12M
CY2012	acm	Receivables Sold Amount ReceivablesSoldAmount	31200000	USD
CY2013	acm	Receivables Sold Amount ReceivablesSoldAmount	100200000	USD
CY2012	acm	Unbilled Receivables Expected Period For Billing And Collection UnbilledReceivablesExpectedPeriodForBillingAndCollection	P12M
CY2013Q3	us-gaap	Acquired Finite Lived Intangible Asset Amount AcquiredFiniteLivedIntangibleAssetAmount	9400000	USD
CY2013Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Cash Paid BusinessAcquisitionCostOfAcquiredEntityCashPaid	62100000	USD
CY2013Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Liabilities Incurred BusinessAcquisitionCostOfAcquiredEntityLiabilitiesIncurred	5600000	USD
CY2013Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Equity Interests Issued And Issuable BusinessAcquisitionCostOfAcquiredEntityEquityInterestsIssuedAndIssuable	14300000	USD
CY2012Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Cash Paid BusinessAcquisitionCostOfAcquiredEntityCashPaid	14500000	USD
CY2012Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Equity Interests Issued And Issuable BusinessAcquisitionCostOfAcquiredEntityEquityInterestsIssuedAndIssuable	900000	USD
CY2011Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Cash Paid BusinessAcquisitionCostOfAcquiredEntityCashPaid	384800000	USD
CY2011Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Equity Interests Issued And Issuable BusinessAcquisitionCostOfAcquiredEntityEquityInterestsIssuedAndIssuable	68500000	USD
CY2012	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-5800000	USD
CY2012Q3	us-gaap	Goodwill Goodwill	1775352000	USD
CY2012	us-gaap	Goodwill Translation Adjustments GoodwillTranslationAdjustments	20400000	USD
CY2012	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	10500000	USD
CY2012	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	336000000	USD
CY2012	acm	Goodwill Impairment Loss Net Of Tax GoodwillImpairmentLossNetOfTax	317200000	USD
CY2011Q3	us-gaap	Goodwill Goodwill	2086300000	USD
CY2013	us-gaap	Goodwill Translation Adjustments GoodwillTranslationAdjustments	-36200000	USD
CY2013	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	72600000	USD
CY2013Q3	us-gaap	Goodwill Goodwill	1811754000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	242500000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	145500000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	96973000	USD
CY2012Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	676300000	USD
CY2013Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	663100000	USD
CY2012Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	350400000	USD
CY2013Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	392400000	USD
CY2012Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	325917000	USD
CY2013Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	270672000	USD
CY2011	us-gaap	Depreciation Depreciation	73200000	USD
CY2012	us-gaap	Depreciation Depreciation	77100000	USD
CY2013	us-gaap	Depreciation Depreciation	70700000	USD
CY2011	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	-6700000	USD
CY2012	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	-6200000	USD
CY2013	us-gaap	Capitalized Computer Software Amortization CapitalizedComputerSoftwareAmortization	-6400000	USD
CY2011Q3	acm	Unamortized Capitalized Software Costs UnamortizedCapitalizedSoftwareCosts	20900000	USD
CY2012Q3	acm	Unamortized Capitalized Software Costs UnamortizedCapitalizedSoftwareCosts	24100000	USD
CY2013Q3	acm	Unamortized Capitalized Software Costs UnamortizedCapitalizedSoftwareCosts	29600000	USD
CY2013Q3	acm	Number Of Employees In Certain Joint Ventures NumberOfEmployeesInCertainJointVentures	0	item
CY2011	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	6	item
CY2012	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	1	item
CY2013	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	3	item
CY2011Q3	acm	Number Of Businesses Acquired Global Cost And Project Management Consultancy Firms NumberOfBusinessesAcquiredGlobalCostAndProjectManagementConsultancyFirms	4	item
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
CY2013Q3	us-gaap	Business Acquisition Cost Of Acquired Entity Purchase Price BusinessAcquisitionCostOfAcquiredEntityPurchasePrice	82000000	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
CY2011Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Prepaid Expense And Other Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpenseAndOtherAssets	149200000	USD
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Other Noncurrent Assets BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssets	3300000	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
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
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
CY2013Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Cash And Cash Equivalents BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashAndCashEquivalents	20100000	USD
CY2013Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Assets Prepaid Expense And Other Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpenseAndOtherAssets	41500000	USD
CY2013Q3	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Amount BusinessAcquisitionPurchasePriceAllocationGoodwillAmount	72600000	USD
CY2013Q3	us-gaap	Business Acquisition Purchase Price Allocation Amortizable Intangible Assets BusinessAcquisitionPurchasePriceAllocationAmortizableIntangibleAssets	9400000	USD
CY2013Q3	us-gaap	Business Acquisition Purchase Price Allocation Other Noncurrent Assets BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssets	8600000	USD
CY2013Q3	us-gaap	Business Acquisition Purchase Price Allocation Current Liabilities BusinessAcquisitionPurchasePriceAllocationCurrentLiabilities	54900000	USD
CY2013Q3	us-gaap	Business Acquisition Purchase Price Allocation Noncurrent Liabilities BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilities	15300000	USD
CY2013Q3	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired Liabilities Assumed Net BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumedNet	82000000	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
CY2012Q3	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	1069700000	USD
CY2013Q3	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	1173300000	USD
CY2012Q3	us-gaap	Debt Current DebtCurrent	162600000	USD
CY2012Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	907141000	USD
CY2013Q3	us-gaap	Debt Current DebtCurrent	84300000	USD
CY2013Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	1089060000	USD
CY2013Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	38200000	USD
CY2013Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	152900000	USD
CY2013Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	37700000	USD
CY2013Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	600000000	USD
CY2013Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	260200000	USD
CY2013	acm	Debt Instrument Covenant Actual Consolidated Leverage Ratio DebtInstrumentCovenantActualConsolidatedLeverageRatio	2.54	pure
CY2013	acm	Debt Instrument Covenant Maximum Consolidated Leverage Ratio DebtInstrumentCovenantMaximumConsolidatedLeverageRatio	3.0	pure
CY2013	acm	Line Of Credit Facility Interest Rate During Period Net Of Interest Rate Swap LineOfCreditFacilityInterestRateDuringPeriodNetOfInterestRateSwap	0.030	pure
CY2012	acm	Line Of Credit Facility Interest Rate During Period Net Of Interest Rate Swap LineOfCreditFacilityInterestRateDuringPeriodNetOfInterestRateSwap	0.031	pure
CY2011	acm	Line Of Credit Facility Interest Rate During Period Net Of Interest Rate Swap LineOfCreditFacilityInterestRateDuringPeriodNetOfInterestRateSwap	0.033	pure
CY2013Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	1700000	USD
CY2012Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	600000	USD
CY2013Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	5200000	USD
CY2012Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	6700000	USD
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	237400000	USD
CY2013Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	410600000	USD
CY2012Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	415200000	USD
CY2013Q3	acm	Accrued Contract Costs Current AccruedContractCostsCurrent	404200000	USD
CY2012Q3	acm	Accrued Contract Costs Current AccruedContractCostsCurrent	333400000	USD
CY2013Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	100500000	USD
CY2012Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	73100000	USD
CY2013Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	915282000	USD
CY2012Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	821663000	USD
CY2013Q3	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	192700000	USD
CY2012Q3	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	192200000	USD
CY2013Q3	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	60200000	USD
CY2012Q3	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	56300000	USD
CY2013Q3	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	196000000	USD
CY2012Q3	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	206000000	USD
CY2013Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	448920000	USD
CY2012Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	454537000	USD
CY2013Q3	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-2100000	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
CY2013Q3	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-66400000	USD
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	2700000	USD
CY2013Q3	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	192800000	USD
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	178200000	USD
CY2013Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-261299000	USD
CY2013Q3	us-gaap	Liabilities Liabilities	3591529000	USD
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-179173000	USD
CY2012Q3	acm	Accrued Contract Costs Related To Professional Liability Current AccruedContractCostsRelatedToProfessionalLiabilityCurrent	117800000	USD
CY2013Q3	acm	Accrued Contract Costs Related To Professional Liability Current AccruedContractCostsRelatedToProfessionalLiabilityCurrent	121300000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	148000000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	111800000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-89200000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	236200000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	224000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	106700000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	29300000	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	500000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2100000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	12100000	USD
CY2012	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	63300000	USD
CY2011	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	58300000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	94700000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	70900000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-19200000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	38500000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	600000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-8700000	USD
CY2012	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1700000	USD
CY2011	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-600000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-20303000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	29200000	USD
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	92578000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	74416000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	100090000	USD
CY2013	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	30300000	USD
CY2013	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	9900000	USD
CY2013	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	59700000	USD
CY2013	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	99900000	USD
CY2013	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	5800000	USD
CY2013	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-10600000	USD
CY2013	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-2500000	USD
CY2011	us-gaap	Increase Decrease In Deferred Compensation IncreaseDecreaseInDeferredCompensation	-89688000	USD
CY2013	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	117500000	USD
CY2013	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2500000	USD
CY2013	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	13400000	USD
CY2013	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-9900000	USD
CY2013	us-gaap	Profit Loss ProfitLoss	243196000	USD
CY2013	acm	Income Tax Reconciliation Tax Credit Foreign Research And Experimentation IncomeTaxReconciliationTaxCreditForeignResearchAndExperimentation	3900000	USD
CY2013	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-7300000	USD
CY2013	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	5500000	USD
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	acm	Income Tax Reconciliation Tax Audit IncomeTaxReconciliationTaxAudit	2100000	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	101100000	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
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	acm	Income Tax Reconciliation Tax Credit Foreign Research And Experimentation IncomeTaxReconciliationTaxCreditForeignResearchAndExperimentation	6100000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	1900000	USD
CY2011	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-3100000	USD
CY2011	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-3400000	USD
CY2013	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
CY2013	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.007	pure
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.040	pure
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.029	pure
CY2013	acm	Effective Income Tax Rate Reconciliation Tax Credit Foreign Research And Experimentation EffectiveIncomeTaxRateReconciliationTaxCreditForeignResearchAndExperimentation	0.011	pure
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	-0.022	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
CY2012	acm	Effective Income Tax Rate Reconciliation Tax Credit Foreign Research And Experimentation EffectiveIncomeTaxRateReconciliationTaxCreditForeignResearchAndExperimentation	0.333	pure
CY2012	acm	Effective Income Tax Rate Reconciliation Tax Audits EffectiveIncomeTaxRateReconciliationTaxAudits	0.120	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	5.783	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	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
CY2011	acm	Effective Income Tax Rate Reconciliation Tax Credit Foreign Research And Experimentation EffectiveIncomeTaxRateReconciliationTaxCreditForeignResearchAndExperimentation	0.016	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0.005	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.008	pure
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.016	pure
CY2013	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.276	pure
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
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
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
CY2013Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	74700000	USD
CY2013Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	58100000	USD
CY2013Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	54700000	USD
CY2013Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	38300000	USD
CY2013Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	58500000	USD
CY2013Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	56100000	USD
CY2013Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	4200000	USD
CY2013Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	359400000	USD
CY2013Q3	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	139300000	USD
CY2013Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	20100000	USD
CY2013Q3	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	15800000	USD
CY2013Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	175200000	USD
CY2013Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	20800000	USD
CY2013Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	163400000	USD
CY2013Q3	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	283900000	USD
CY2012Q3	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	306600000	USD
CY2013Q3	acm	Tax Credit Carryforward Amount Federal Research And Development TaxCreditCarryforwardAmountFederalResearchAndDevelopment	1800000	USD
CY2013Q3	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	15700000	USD
CY2013Q3	acm	Tax Credit Carryforward Amount California Enterprise Zone Tax Credits TaxCreditCarryforwardAmountCaliforniaEnterpriseZoneTaxCredits	4100000	USD
CY2013Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	338600000	USD
CY2013	acm	Undistributed Earnings From Foreign Subsidiaries UndistributedEarningsFromForeignSubsidiaries	852200000	USD
CY2013Q3	acm	Unrecognized Tax Benefits And Potential Income Tax Penalties And Interest Net Of Related Tax Benefit UnrecognizedTaxBenefitsAndPotentialIncomeTaxPenaltiesAndInterestNetOfRelatedTaxBenefit	60200000	USD
CY2013Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	33500000	USD
CY2011Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	58100000	USD
CY2012Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	55800000	USD
CY2013Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	53700000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	-1600000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	7200000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	3700000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	5600000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	4400000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	-5200000	USD
CY2013	acm	Unrecognized Tax Benefits Increases Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromCurrentPeriodTaxPositions	3800000	USD
CY2012	acm	Unrecognized Tax Benefits Increases Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromCurrentPeriodTaxPositions	4900000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	5900000	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	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	100000	USD
CY2013Q3	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	7300000	USD
CY2013Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	2700000	USD
CY2012	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	700000	shares
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	111875000	shares
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	100618000	shares
CY2013	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1300000	shares
CY2013	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	101942000	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	111875000	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	117396000	shares
CY2011	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	900000	shares
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	118345000	shares
CY2013	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	item
CY2013	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-70441000	USD
CY2013	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	8153495000	USD
CY2013	acm	Sales Revenue Services Net Of Other Direct Costs SalesRevenueServicesNetOfOtherDirectCosts	4977000000	USD
CY2013	us-gaap	Gross Profit GrossProfit	449988000	USD
CY2013	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	24319000	USD
CY2013	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	97318000	USD
CY2013	us-gaap	Operating Income Loss OperatingIncomeLoss	376989000	USD
CY2013	acm	Gross Profit As Percentage Of Sales Revenue Services Net GrossProfitAsPercentageOfSalesRevenueServicesNet	0.055	pure
CY2013	acm	Gross Profit As Percentage Of Sales Revenue Services Net Of Other Direct Costs GrossProfitAsPercentageOfSalesRevenueServicesNetOfOtherDirectCosts	0.090	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	Gross Profit GrossProfit	421859000	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
CY2011	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	8037374000	USD
CY2011	acm	Sales Revenue Services Net Of Other Direct Costs SalesRevenueServicesNetOfOtherDirectCosts	5180800000	USD
CY2011	us-gaap	Gross Profit GrossProfit	466702000	USD
CY2011	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	44819000	USD
CY2011	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	90298000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	421223000	USD
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
CY2013Q3	us-gaap	Assets Assets	5665623000	USD
CY2012Q3	us-gaap	Assets Assets	5664568000	USD
CY2011Q3	us-gaap	Assets Assets	5789300000	USD
CY2013	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	3522000	USD
CY2011Q3	us-gaap	Noncurrent Assets NoncurrentAssets	2716300000	USD
CY2012Q3	us-gaap	Noncurrent Assets NoncurrentAssets	2390300000	USD
CY2013Q3	us-gaap	Noncurrent Assets NoncurrentAssets	2390500000	USD
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
CY2013Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	18700000	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	2300000	USD
CY2012Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	4800000	USD
CY2012Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1500000	USD
CY2012Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	2000000	USD
CY2011Q4	us-gaap	Interest Expense InterestExpense	11000000	USD
CY2012Q1	us-gaap	Interest Expense InterestExpense	11600000	USD
CY2012Q2	us-gaap	Interest Expense InterestExpense	13100000	USD
CY2012Q3	us-gaap	Interest Expense InterestExpense	11000000	USD
CY2013Q2	us-gaap	Cost Of Services CostOfServices	1935700000	USD
CY2013Q3	us-gaap	Cost Of Services CostOfServices	1938900000	USD
CY2012Q4	us-gaap	Gross Profit GrossProfit	78100000	USD
CY2013Q1	us-gaap	Gross Profit GrossProfit	99900000	USD
CY2013Q2	us-gaap	Gross Profit GrossProfit	131800000	USD
CY2013Q3	us-gaap	Gross Profit GrossProfit	140200000	USD
CY2012Q4	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	5900000	USD
CY2013Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	7900000	USD
CY2013Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	4100000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-83455000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	8401000	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
CY2012Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	100000	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
CY2012Q4	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	2017300000	USD
CY2013Q1	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	1989600000	USD
CY2013Q2	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	2067500000	USD
CY2013Q3	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	2079100000	USD
CY2012Q4	us-gaap	Cost Of Services CostOfServices	1939200000	USD
CY2013Q1	us-gaap	Cost Of Services CostOfServices	1889700000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-40053000	USD
CY2013Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	6400000	USD
CY2012Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	22100000	USD
CY2013Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	27300000	USD
CY2013Q2	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	24000000	USD
CY2013Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	23900000	USD
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.36
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.54
CY2013Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.71
CY2013Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.78
CY2012Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	61900000	USD
CY2013Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	80500000	USD
CY2013Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	111900000	USD
CY2013Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	122700000	USD
CY2012Q4	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	700000	USD
CY2013Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	100000	USD
CY2013Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1200000	USD
CY2013Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1500000	USD
CY2012Q4	us-gaap	Interest Expense InterestExpense	10900000	USD
CY2013Q1	us-gaap	Interest Expense InterestExpense	11900000	USD
CY2013Q2	us-gaap	Interest Expense InterestExpense	11700000	USD
CY2013Q3	us-gaap	Interest Expense InterestExpense	10200000	USD
CY2012Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12700000	USD
CY2013Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14000000	USD
CY2013Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	30100000	USD
CY2013Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	35800000	USD
CY2012Q4	us-gaap	Profit Loss ProfitLoss	39000000	USD
CY2013Q1	us-gaap	Profit Loss ProfitLoss	54700000	USD
CY2013Q2	us-gaap	Profit Loss ProfitLoss	71300000	USD
CY2013Q3	us-gaap	Profit Loss ProfitLoss	78200000	USD
CY2012Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	900000	USD
CY2013Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	900000	USD
CY2013Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	500000	USD
CY2013Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1700000	USD
CY2012Q4	us-gaap	Net Income Loss NetIncomeLoss	38100000	USD
CY2013Q1	us-gaap	Net Income Loss NetIncomeLoss	53800000	USD
CY2013Q2	us-gaap	Net Income Loss NetIncomeLoss	70800000	USD
CY2013Q3	us-gaap	Net Income Loss NetIncomeLoss	76500000	USD
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.36
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.53
CY2013Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.70
CY2013Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.77
CY2012Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	104800000	shares
CY2013Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	100400000	shares
CY2013Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	99300000	shares
CY2013Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	98000000	shares
CY2012Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	105500000	shares
CY2013Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	101800000	shares
CY2013Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	100800000	shares
CY2013Q3	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	186600000	USD
CY2013Q3	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	156700000	USD
CY2013Q3	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	135200000	USD
CY2013Q3	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	111500000	USD
CY2013Q3	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	94900000	USD
CY2013Q3	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	291900000	USD
CY2013Q3	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	976800000	USD
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	254500000	USD
CY2013	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	225400000	USD
CY2013Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	99700000	shares
CY2013Q3	acm	Cash And Cash Equivalents General CashAndCashEquivalentsGeneral	450328000	USD
CY2012Q3	acm	Cash And Cash Equivalents General CashAndCashEquivalentsGeneral	456983000	USD
CY2013Q3	acm	Cash In Consolidated Joint Ventures CashInConsolidatedJointVentures	150349000	USD
CY2012Q3	acm	Cash In Consolidated Joint Ventures CashInConsolidatedJointVentures	136793000	USD
CY2013Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	600677000	USD
CY2012Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	593776000	USD
CY2013Q3	us-gaap	Other Assets Current OtherAssetsCurrent	168714000	USD
CY2012Q3	us-gaap	Other Assets Current OtherAssetsCurrent	140764000	USD
CY2013Q3	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	19949000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	16872000	USD
CY2013Q3	us-gaap	Assets Current AssetsCurrent	3131602000	USD
CY2012Q3	us-gaap	Assets Current AssetsCurrent	3147293000	USD
CY2013Q3	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	143478000	USD
CY2012Q3	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	126948000	USD
CY2013Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	80045000	USD
CY2012Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	91049000	USD
CY2013Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	144923000	USD
CY2012Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	101036000	USD
CY2013Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	29578000	USD
CY2012Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	1641000	USD
CY2013Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	725389000	USD
CY2012Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	761211000	USD
CY2013Q3	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	6127000	USD
CY2012Q3	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	12641000	USD
CY2013Q3	us-gaap	Billings In Excess Of Cost BillingsInExcessOfCost	322486000	USD
CY2012Q3	us-gaap	Billings In Excess Of Cost BillingsInExcessOfCost	320296000	USD
CY2013Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	54687000	USD
CY2012Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	160950000	USD
CY2013Q3	us-gaap	Liabilities Current LiabilitiesCurrent	2053549000	USD
CY2012Q3	us-gaap	Liabilities Current LiabilitiesCurrent	2078402000	USD
CY2012Q3	us-gaap	Liabilities Liabilities	3440080000	USD
CY2013Q3	us-gaap	Common Stock Value CommonStockValue	960000	USD
CY2012Q3	us-gaap	Common Stock Value CommonStockValue	1070000	USD
CY2013Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1809627000	USD
CY2012Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1741478000	USD
CY2013Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	472155000	USD
CY2012Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	606089000	USD
CY2013Q3	us-gaap	Stockholders Equity StockholdersEquity	2021443000	USD
CY2012Q3	us-gaap	Stockholders Equity StockholdersEquity	2169464000	USD
CY2013Q3	us-gaap	Minority Interest MinorityInterest	52651000	USD
CY2012Q3	us-gaap	Minority Interest MinorityInterest	55024000	USD
CY2013Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2074094000	USD
CY2012Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2224488000	USD
CY2013Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5665623000	USD
CY2012Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5664568000	USD
CY2012Q3	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2013Q3	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2012Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20	shares
CY2012Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20	shares
CY2013Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	2	shares
CY2013Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	2	shares
CY2012Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	3	shares
CY2012Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	3	shares
CY2013Q3	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	1.00
CY2012Q3	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	1.00
CY2013Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2012Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2013Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2013Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	96016358	shares
CY2012Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	107041003	shares
CY2013Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	96016358	shares
CY2012Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	107041003	shares
CY2013	us-gaap	Cost Of Services CostOfServices	7703507000	USD
CY2012	us-gaap	Cost Of Services CostOfServices	7796321000	USD
CY2011	us-gaap	Cost Of Services CostOfServices	7570672000	USD
CY2012	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	10603000	USD
CY2011	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	5008000	USD
CY2013	us-gaap	Interest Expense InterestExpense	44737000	USD
CY2012	us-gaap	Interest Expense InterestExpense	46726000	USD
CY2011	us-gaap	Interest Expense InterestExpense	42051000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	335774000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	17483000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	384180000	USD
CY2012	us-gaap	Profit Loss ProfitLoss	-56933000	USD
CY2011	us-gaap	Profit Loss ProfitLoss	284090000	USD
CY2013	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3953000	USD
CY2012	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1634000	USD
CY2011	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	8290000	USD
CY2013	us-gaap	Net Income Loss NetIncomeLoss	239243000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	-58567000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	275800000	USD
CY2011	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	2000	USD
CY2013	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	239243000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-58567000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	275798000	USD
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.38
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.52
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.35
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.35
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.52
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.33
CY2012	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	53895000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-45609000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-260000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-5043000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	1828000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	1327000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	1568000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-3716000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	14582000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	41778000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-5556000	USD
CY2013	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	159741000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-48532000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	244037000	USD
CY2013	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	2624000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	1634000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	8290000	USD
CY2013	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	157117000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-50166000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	235747000	USD
CY2011	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	3001000	USD
CY2011	us-gaap	Minority Interest Increase From Stock Issuance MinorityInterestIncreaseFromStockIssuance	1700000	USD
CY2011	us-gaap	Minority Interest In Net Income Loss Other Minority Interests MinorityInterestInNetIncomeLossOtherMinorityInterests	20000	USD
CY2011	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	24937000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	61248000	USD
CY2011	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	6280000	USD
CY2011	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	167044000	USD
CY2011	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	88531000	USD
CY2011Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2395137000	USD
CY2012	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	1283000	USD
CY2012	us-gaap	Minority Interest In Net Income Loss Other Minority Interests MinorityInterestInNetIncomeLossOtherMinorityInterests	753000	USD
CY2012	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	26551000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	-350000	USD
CY2012	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	4541000	USD
CY2012	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	169454000	USD
CY2012	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	18631000	USD
CY2013	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	19906000	USD
CY2013	us-gaap	Minority Interest Increase From Stock Issuance MinorityInterestIncreaseFromStockIssuance	1421000	USD
CY2013	us-gaap	Minority Interest In Net Income Loss Other Minority Interests MinorityInterestInNetIncomeLossOtherMinorityInterests	-13488000	USD
CY2013	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	32611000	USD
CY2013	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	1239000	USD
CY2013	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	14365000	USD
CY2013	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	381704000	USD
CY2013	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	28351000	USD
CY2010Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2138469000	USD
CY2013	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	94406000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	102974000	USD
CY2013	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-92152000	USD
CY2013	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	31159000	USD
CY2012	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	26401000	USD
CY2011	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	36628000	USD
CY2013	us-gaap	Share Based Compensation ShareBasedCompensation	32611000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	26551000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	24937000	USD
CY2013	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	1754000	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	1254000	USD
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	61248000	USD
CY2013	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	16061000	USD
CY2012	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-9735000	USD
CY2011	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	7251000	USD
CY2013	us-gaap	Other Noncash Expense OtherNoncashExpense	1821000	USD
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	110306000	USD
CY2012	us-gaap	Other Noncash Expense OtherNoncashExpense	-5286000	USD
CY2011	us-gaap	Other Noncash Expense OtherNoncashExpense	3052000	USD
CY2012	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	21544000	USD
CY2011	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	89052000	USD
CY2013	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	21836000	USD
CY2012	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-11363000	USD
CY2011	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-39599000	USD
CY2013	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-47019000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	80999000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	76144000	USD
CY2013	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	71125000	USD
CY2012	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	14682000	USD
CY2011	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-67975000	USD
CY2013	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-12945000	USD
CY2012	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-5376000	USD
CY2011	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-58551000	USD
CY2013	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-19027000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-28180000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-40456000	USD
CY2013	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-7701000	USD
CY2012	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	12173000	USD
CY2011	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-12904000	USD
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	408598000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	433352000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	132012000	USD
CY2013	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	42005000	USD
CY2012	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	12571000	USD
CY2011	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	365540000	USD
CY2012	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	2647000	USD
CY2011	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	2434000	USD
CY2013	acm	Receipts From Payments To Joint Ventures And Other Investments ReceiptsFromPaymentsToJointVenturesAndOtherInvestments	2781000	USD
CY2012	acm	Receipts From Payments To Joint Ventures And Other Investments ReceiptsFromPaymentsToJointVenturesAndOtherInvestments	-2846000	USD
CY2011	acm	Receipts From Payments To Joint Ventures And Other Investments ReceiptsFromPaymentsToJointVenturesAndOtherInvestments	-23398000	USD
CY2013	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	50873000	USD
CY2012	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	87000	USD
CY2011	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	22683000	USD
CY2012	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	1958000	USD
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	77991000	USD
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-139490000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-73773000	USD
CY2012	us-gaap	Repayments Of Debt RepaymentsOfDebt	1550996000	USD
CY2011	us-gaap	Repayments Of Debt RepaymentsOfDebt	2640649000	USD
CY2011	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	59324000	USD
CY2011	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	65261000	USD
CY2013	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	52117000	USD
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	62874000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-421917000	USD
CY2013	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	2278465000	USD
CY2012	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	1454861000	USD
CY2011	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	2863906000	USD
CY2013	us-gaap	Repayments Of Debt RepaymentsOfDebt	2156399000	USD
CY2011	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	59324000	USD
CY2013	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	14029000	USD
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	13760000	USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	15020000	USD
CY2013	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	14365000	USD
CY2012	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	4541000	USD
CY2011	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	6280000	USD
CY2013	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	379718000	USD
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	152666000	USD
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	100000000	USD
CY2013	acm	Payments For Other Repurchase Of Common Stock PaymentsForOtherRepurchaseOfCommonStock	8383000	USD
CY2012	acm	Payments For Other Repurchase Of Common Stock PaymentsForOtherRepurchaseOfCommonStock	7085000	USD
CY2011	acm	Payments For Other Repurchase Of Common Stock PaymentsForOtherRepurchaseOfCommonStock	67044000	USD
CY2013	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1754000	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1254000	USD
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	61248000	USD
CY2013	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-18486000	USD
CY2012	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-1283000	USD
CY2011	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-1301000	USD
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-254373000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-237614000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	137460000	USD
CY2013	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	-7834000	USD
CY2012	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	14871000	USD
CY2011	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	-3472000	USD
CY2013	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	6901000	USD
CY2012	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	136836000	USD
CY2011	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	-155917000	USD
CY2012	acm	Equity Issued To Settle Liabilities Non Cash EquityIssuedToSettleLiabilitiesNonCash	4016000	USD
CY2011	acm	Equity Issued To Settle Liabilities Non Cash EquityIssuedToSettleLiabilitiesNonCash	5058000	USD
CY2013	us-gaap	Interest Paid InterestPaid	37342000	USD
CY2012	us-gaap	Interest Paid InterestPaid	39044000	USD
CY2011	us-gaap	Interest Paid InterestPaid	36624000	USD
CY2012	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	38482000	USD
CY2011	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	37991000	USD
CY2011Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	456940000	USD
CY2010Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	612857000	USD
CY2013Q3	us-gaap	Business Acquisition Equity Interest Issued Or Issuable Value Assigned BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned	14322000	USD
CY2012Q3	us-gaap	Business Acquisition Equity Interest Issued Or Issuable Value Assigned BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned	857000	USD
CY2011Q3	us-gaap	Business Acquisition Equity Interest Issued Or Issuable Value Assigned BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned	68453000	USD
CY2013	dei	Entity Registrant Name EntityRegistrantName	AECOM TECHNOLOGY CORP
CY2013	dei	Entity Central Index Key EntityCentralIndexKey	0000868857
CY2013	dei	Document Type DocumentType	10-K
CY2013	dei	Document Period End Date DocumentPeriodEndDate	2013-09-30
CY2013	dei	Amendment Flag AmendmentFlag	false
CY2013	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--09-30
CY2013	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2013	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2013	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
CY2013	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2013	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2013	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2013Q1	dei	Entity Public Float EntityPublicFloat	2300000000	USD
CY2013Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	98196114	shares
CY2013Q3	acm	Deferred Tax Assets Additional Valuation Allowance Provided DeferredTaxAssetsAdditionalValuationAllowanceProvided	53700000	USD
CY2012	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	0	USD
CY2013	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	115508000	USD
CY2012Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	336000000	USD
CY2013	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	2724000	USD
CY2013	acm	Defined Contribution And Compensation Plan Compensation Expense DefinedContributionAndCompensationPlanCompensationExpense	14600000	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
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-7210000	USD
CY2011Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	68000000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	66400000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	91200000	USD
CY2012Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-208100000	USD
CY2012Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	51700000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	68700000	USD
CY2013Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	101400000	USD
CY2013Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	114000000	USD
CY2012Q3	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue
CY2013Q3	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue
CY2012	acm	Number Of Reporting Units NumberOfReportingUnits	2	item
CY2011Q3	acm	Stock Repurchase Program Additional Authorized Amount StockRepurchaseProgramAdditionalAuthorizedAmount	200000000	USD
CY2012Q3	acm	Stock Repurchase Program Additional Authorized Amount StockRepurchaseProgramAdditionalAuthorizedAmount	300000000	USD
CY2013Q1	acm	Stock Repurchase Program Additional Authorized Amount StockRepurchaseProgramAdditionalAuthorizedAmount	500000000	USD
CY2013Q3	acm	Tax Credit Carryforward Amount Federal Foreign Tax Credits TaxCreditCarryforwardAmountFederalForeignTaxCredits	16800000	USD
CY2013	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1600000	USD
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.005	pure
CY2013Q3	acm	Deferred Tax Assets Investment In Noncontrolled Affiliates DeferredTaxAssetsInvestmentInNoncontrolledAffiliates	13900000	USD
CY2013Q3	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	900000	USD
CY2012Q3	acm	Unrecognized Tax Benefits And Potential Income Tax Penalties And Interest Net Of Related Tax Benefit UnrecognizedTaxBenefitsAndPotentialIncomeTaxPenaltiesAndInterestNetOfRelatedTaxBenefit	56300000	USD

Files In Submission

Name	View Source	Status
0001047469-13-010484-index-headers.html	Edgar Link	pending
0001047469-13-010484-index.html	Edgar Link	pending
0001047469-13-010484.txt	Edgar Link	pending
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a2217354zex-31_1.htm	Edgar Link	pending
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acm-20130930.xml	Edgar Link	completed
acm-20130930.xsd	Edgar Link	pending
acm-20130930_cal.xml	Edgar Link	unprocessable
acm-20130930_def.xml	Edgar Link	unprocessable
acm-20130930_lab.xml	Edgar Link	unprocessable
acm-20130930_pre.xml	Edgar Link	unprocessable
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Financial_Report.xls	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
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Show.js	Edgar Link	pending

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$ACM
AECOM Stock $acm

2013 Q4 Form 10-K Financial Statement

#000104746913010484 Filed on November 13, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ACM AECOM Stock $acm

2013 Q4 Form 10-K Financial Statement

#000104746913010484 Filed on November 13, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ACM
AECOM Stock $acm