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The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. 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A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase (decrease) in deferred hedging gains or losses. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 14 Stock-based compensation expense: 3 us-gaap_ShareBasedCompensationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 15 Non-employee director stock awards (in shares) 4 aye_StockIssuedDuringPeriodSharesDirectorStockAward aye false na duration Represents the number of shares issued during the period for non-employee director stock awards. false false false false false false false false false false false terselabel false 1 false true false false 18907 18907 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Represents the number of shares issued during the period for non-employee director stock awards. 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No authoritative reference available. false 17 Stock options 4 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 0 0 true false false 2 false true false false 5600000 5.6 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 5600000 5.6 true false false 7 false true false false 0 0 true false false 8 false true false false 5600000 5.6 false false false xbrli:monetaryItemType monetary This element represents the amount of recognized share-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). 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No authoritative reference available. false 19 Restricted shares (in shares) 4 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross us-gaap true na duration No definition available. false false false false false false false false false false false false 1 false true false false 17850 17850 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards. 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The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. 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The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 4 -Subparagraph c, d Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 52 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 17, 19, 24 false 10 Cash flow hedges, net of tax 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false -33700000 -33.7 true false false 6 false true false false -33700000 -33.7 true false false 7 false true false false 0 0 true false false 8 false true false false -33700000 -33.7 false false false xbrli:monetaryItemType monetary Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase (decrease) in deferred hedging gains or losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14, 17, 20, 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 31, 46 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 46 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 24 -Subparagraph b Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14, 17, 20, 24, 26 false 11 Equity contribution to PATH, LLC by AEP 3 aye_EquityContributionToNoncontrollingInterests aye false debit duration Equity contribution to PATH, LLC by AEP false false false false false false false false false false false terselabel false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 0 0 true false false 7 false true false false 6600000 6.6 true false false 8 false true false false 6600000 6.6 false false false xbrli:monetaryItemType monetary Equity contribution to PATH, LLC by AEP No authoritative reference available. false 13 Dividends on common stock 3 us-gaap_DividendsCommonStock us-gaap true debit duration No definition available. false false false false false false false false false false true negated false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false -25400000 -25.4 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false -25400000 -25.4 true false false 7 false true false false 0 0 true false false 8 false true false false -25400000 -25.4 false false false xbrli:monetaryItemType monetary Aggregate cash, stock, and paid-in-kind dividends declared for common shareholders during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 14 Stock-based compensation expense: 3 us-gaap_ShareBasedCompensationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 15 Non-employee director stock awards (in shares) 4 aye_StockIssuedDuringPeriodSharesDirectorStockAward aye false na duration Represents the number of shares issued during the period for non-employee director stock awards. false false false false false false false false false false false terselabel false 1 false true false false 3000 3000 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Represents the number of shares issued during the period for non-employee director stock awards. No authoritative reference available. false 16 Non-employee director stock awards 4 aye_StockIssuedDuringPeriodValueDirectorStockAward aye false credit duration Par value stock issued during the period as a result of the issuance of non-employee director stock awards. false false false false false false false false false false false terselabel false 1 false true false false 0 0 true false false 2 false true false false 200000 0.2 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 200000 0.2 true false false 7 false true false false 0 0 true false false 8 false true false false 200000 0.2 false false false xbrli:monetaryItemType monetary Par value stock issued during the period as a result of the issuance of non-employee director stock awards. No authoritative reference available. false 17 Stock options 4 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 0 0 true false false 2 false true false false 1700000 1.7 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 1700000 1.7 true false false 7 false true false false 0 0 true false false 8 false true false false 1700000 1.7 false false false xbrli:monetaryItemType monetary This element represents the amount of recognized share-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 39 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A91 false 18 Performance shares 4 aye_NonVestedStockUnitAndPerformanceBasedAwardCompensation aye false credit duration Non-vested stock unit and performance-based award compensation. false false false false false false false false false false false terselabel false 1 false true false false 0 0 true false false 2 false true false false 1400000 1.4 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 1400000 1.4 true false false 7 false true false false 0 0 true false false 8 false true false false 1400000 1.4 false false false xbrli:monetaryItemType monetary Non-vested stock unit and performance-based award compensation. No authoritative reference available. false 21 Exercise of stock options (in shares) 3 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 33060 33060 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Number of shares issued during the period as a result of the exercise of stock options. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 false 22 Exercise of stock options 3 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0 0 true false false 2 false true false false 400000 0.4 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 400000 0.4 true false false 7 false true false false 0 0 true false false 8 false true false false 400000 0.4 false false false xbrli:monetaryItemType monetary Value stock issued during the period as a result of the exercise of stock options. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 false 27 Settlement of stock units (in shares) 3 aye_SettlementOfStockUnits aye false na duration Settlement of stock units false false false false false false false false false false false terselabel false 1 false true false false 3573 3573 true false false 2 false true false false 0 0 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 0 0 true false false 7 false true false false 0 0 true false false 8 false true false false 0 0 false false false xbrli:sharesItemType shares Settlement of stock units No authoritative reference available. false 28 Share-based excess tax benefits 3 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0 0 true false false 2 false true false false -19700000 -19.7 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false -19700000 -19.7 true false false 7 false true false false 0 0 true false false 8 false true false false -19700000 -19.7 false false false xbrli:monetaryItemType monetary Tax benefit associated with any share-based compensation plan other than an employee stock ownership plan (ESOP). The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. Includes any resulting tax benefit that exceeds the previously recognized deferred tax asset (excess tax benefits). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 62 false 29 Balance (in shares) at Sep. 30, 2009 3 aye_SharesOutstanding aye false na instant Number of shares of stock held by shareholders. false false false true false false false false false true false periodendlabel instant 2009-09-30T00:00:00 0001-01-01T00:00:00 false 1 false true false false 169522224 169522224 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Number of shares of stock held by shareholders. No authoritative reference available. false 30 Balance at Sep. 30, 2009 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant No definition available. false false false true false false false false false true false periodendlabel instant 2009-09-30T00:00:00 0001-01-01T00:00:00 false 1 false true false false 211900000 211.9 true false false 2 false true false false 1965900000 1965.9 true false false 3 false true false false 938900000 938.9 true false false 4 false true false false -1800000 -1.8 true false false 5 false true false false -66500000 -66.5 true false false 6 false true false false 3048400000 3048.4 true false false 7 false true false false 12600000 12.6 true false false 8 false true false false 3061000000 3061.0 false false false xbrli:monetaryItemType monetary Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 25 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 26 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A false 5 Balance (in shares) at Dec. 31, 2009 3 aye_SharesOutstanding aye false na instant Number of shares of stock held by shareholders. false false false true false false false false true false false periodstartlabel instant 2010-01-01T00:00:00 0001-01-01T00:00:00 false 1 false true false false 169569604 169569604 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Number of shares of stock held by shareholders. No authoritative reference available. false 6 Balance at Dec. 31, 2009 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant No definition available. false false false true false false false false true false false periodstartlabel instant 2010-01-01T00:00:00 0001-01-01T00:00:00 false 1 false true false false 212000000 212.0 true false false 2 false true false false 1970200000 1970.2 true false false 3 false true false false 1022700000 1022.7 true false false 4 false true false false -1800000 -1.8 true false false 5 false true false false -89900000 -89.9 true false false 6 false true false false 3113200000 3113.2 true false false 7 false true false false 14900000 14.9 true false false 8 false true false false 3128100000 3128.1 false false false xbrli:monetaryItemType monetary Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 25 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 26 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A false 7 Net income 3 us-gaap_ProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false 323500000 323.5 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 323500000 323.5 true false false 7 false true false false 0 0 true false false 8 false true false false 323500000 323.5 false false false xbrli:monetaryItemType monetary The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) false 8 Amortization - pension and OBEB plans, net of tax 3 us-gaap_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 2500000 2.5 true false false 6 false true false false 2500000 2.5 true false false 7 false true false false 0 0 true false false 8 false true false false 2500000 2.5 false false false xbrli:monetaryItemType monetary The adjustment out of other comprehensive income for prior service costs recognized as a component of net period benefit cost during the period, after tax. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 4 -Subparagraph c, d Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 52 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 17, 19, 24 false 9 Adjustment to unamortized OPEB plan actuarial loss, net of tax 3 aye_OtherComprehensiveIncomeAdjustmentToUnamortizedOtherPostEmploymentBenefitPlanActuarialLossNetOfTax aye false credit duration Other Comprehensive Income, Adjustment to unamortized other post employment benefit plan actuarial loss, net of tax false false false false false false false false false false false verboselabel false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 7400000 7.4 true false false 6 false true false false 7400000 7.4 true false false 7 false true false false 0 0 true false false 8 false true false false 7400000 7.4 false false false xbrli:monetaryItemType monetary Other Comprehensive Income, Adjustment to unamortized other post employment benefit plan actuarial loss, net of tax No authoritative reference available. false 10 Cash flow hedges, net of tax 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 46900000 46.9 true false false 6 false true false false 46900000 46.9 true false false 7 false true false false 0 0 true false false 8 false true false false 46900000 46.9 false false false xbrli:monetaryItemType monetary Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase (decrease) in deferred hedging gains or losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14, 17, 20, 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 31, 46 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 46 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 24 -Subparagraph b Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14, 17, 20, 24, 26 false 12 Deconsolidation of PATH WV 3 aye_ConsolidationsDeconsolidationsOfNoncontrollingInterests aye false debit duration Consolidations deconsolidations of noncontrolling interests false false false false false false false false false false true negated false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 0 0 true false false 7 false true false false -14900000 -14.9 true false false 8 false true false false -14900000 -14.9 false false false xbrli:monetaryItemType monetary Consolidations deconsolidations of noncontrolling interests No authoritative reference available. false 13 Dividends on common stock 3 us-gaap_DividendsCommonStock us-gaap true debit duration No definition available. false false false false false false false false false false true negated false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false -76300000 -76.3 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false -76300000 -76.3 true false false 7 false true false false 0 0 true false false 8 false true false false -76300000 -76.3 false false false xbrli:monetaryItemType monetary Aggregate cash, stock, and paid-in-kind dividends declared for common shareholders during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 14 Stock-based compensation expense: 3 us-gaap_ShareBasedCompensationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 15 Non-employee director stock awards (in shares) 4 aye_StockIssuedDuringPeriodSharesDirectorStockAward aye false na duration Represents the number of shares issued during the period for non-employee director stock awards. false false false false false false false false false false false terselabel false 1 false true false false 9000 9000 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Represents the number of shares issued during the period for non-employee director stock awards. No authoritative reference available. false 16 Non-employee director stock awards 4 aye_StockIssuedDuringPeriodValueDirectorStockAward aye false credit duration Par value stock issued during the period as a result of the issuance of non-employee director stock awards. false false false false false false false false false false false terselabel false 1 false true false false 0 0 true false false 2 false true false false 600000 0.6 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 600000 0.6 true false false 7 false true false false 0 0 true false false 8 false true false false 600000 0.6 false false false xbrli:monetaryItemType monetary Par value stock issued during the period as a result of the issuance of non-employee director stock awards. No authoritative reference available. false 17 Stock options 4 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 0 0 true false false 2 false true false false 6500000 6.5 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 6500000 6.5 true false false 7 false true false false 0 0 true false false 8 false true false false 6500000 6.5 false false false xbrli:monetaryItemType monetary This element represents the amount of recognized share-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 39 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A91 false 18 Performance shares 4 aye_NonVestedStockUnitAndPerformanceBasedAwardCompensation aye false credit duration Non-vested stock unit and performance-based award compensation. false false false false false false false false false false false terselabel false 1 false true false false 0 0 true false false 2 false true false false 10200000 10.2 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 10200000 10.2 true false false 7 false true false false 0 0 true false false 8 false true false false 10200000 10.2 false false false xbrli:monetaryItemType monetary Non-vested stock unit and performance-based award compensation. No authoritative reference available. false 19 Restricted shares (in shares) 4 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross us-gaap true na duration No definition available. false false false false false false false false false false false false 1 false true false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4, 5 false 20 Restricted shares 4 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 0 0 true false false 2 false true false false 300000 0.3 true false false 3 false true false false 0 0 true false false 4 false true false false -100000 -0.1 true false false 5 false true false false 0 0 true false false 6 false true false false 200000 0.2 true false false 7 false true false false 0 0 true false false 8 false true false false 200000 0.2 false false false xbrli:monetaryItemType monetary Aggregate value of stock related to Restricted Stock Awards issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 false 21 Exercise of stock options (in shares) 3 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 51250 51250 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Number of shares issued during the period as a result of the exercise of stock options. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 false 22 Exercise of stock options 3 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 100000 0.1 true false false 2 false true false false 700000 0.7 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 800000 0.8 true false false 7 false true false false 0 0 true false false 8 false true false false 800000 0.8 false false false xbrli:monetaryItemType monetary Value stock issued during the period as a result of the exercise of stock options. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 false 23 Issuance of performance shares (in shares) 3 aye_IssuanceOfPerformanceSharesInShares aye false na duration Issuance of performance shares false false false false false false false false false false false label false 1 false true false false 309798 309798 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Issuance of performance shares No authoritative reference available. false 24 Issuance of performance shares 3 aye_IssuanceOfPerformanceShares aye false credit duration Issuance of performance shares false false false false false false false false false false false label false 1 false true false false 400000 0.4 true false false 2 false true false false -4400000 -4.4 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false -4000000 -4.0 true false false 7 false true false false 0 0 true false false 8 false true false false -4000000 -4.0 false false false xbrli:monetaryItemType monetary Issuance of performance shares No authoritative reference available. false 25 Purchase of treasury shares (in shares) 3 us-gaap_TreasuryStockSharesAcquired us-gaap true na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -3642 -3642 true false false 2 false true false false 0 0 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 0 0 true false false 7 false true false false 0 0 true false false 8 false true false false 0 0 false false false xbrli:sharesItemType shares Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 false 29 Balance (in shares) at Sep. 30, 2010 3 aye_SharesOutstanding aye false na instant Number of shares of stock held by shareholders. false false false true false false false false false true false periodendlabel instant 2010-09-30T00:00:00 0001-01-01T00:00:00 false 1 false true false false 169936010 169936010 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Number of shares of stock held by shareholders. No authoritative reference available. false 30 Balance at Sep. 30, 2010 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant No definition available. false false false true false false false false false true false periodendlabel instant 2010-09-30T00:00:00 0001-01-01T00:00:00 false 1 false true false false 212500000 212.5 true false false 2 false true false false 1984100000 1984.1 true false false 3 false true false false 1269900000 1269.9 true false false 4 false true false false -1900000 -1.9 true false false 5 false true false false -33100000 -33.1 true false false 6 false true false false 3431500000 3431.5 true false false 7 false true false false 0 0 true false false 8 false true false false 3431500000 3431.5 false false false xbrli:monetaryItemType monetary Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 25 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 26 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A false 5 Balance (in shares) at Jun. 30, 2010 3 aye_SharesOutstanding aye false na instant Number of shares of stock held by shareholders. false false false true false false false false true false false periodstartlabel instant 2010-07-01T00:00:00 0001-01-01T00:00:00 false 1 false true false false 169614706 169614706 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Number of shares of stock held by shareholders. No authoritative reference available. false 6 Balance at Jun. 30, 2010 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant No definition available. false false false true false false false false true false false periodstartlabel instant 2010-07-01T00:00:00 0001-01-01T00:00:00 false 1 false true false false 212100000 212.1 true false false 2 false true false false 1979600000 1979.6 true false false 3 false true false false 1180200000 1180.2 true false false 4 false true false false -1800000 -1.8 true false false 5 false true false false -64200000 -64.2 true false false 6 false true false false 3305900000 3305.9 true false false 7 false true false false 0 0 true false false 8 false true false false 3305900000 3305.9 false false false xbrli:monetaryItemType monetary Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 25 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 26 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A false 7 Net income 3 us-gaap_ProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false 115100000 115.1 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 115100000 115.1 true false false 7 false true false false 0 0 true false false 8 false true false false 115100000 115.1 false false false xbrli:monetaryItemType monetary The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) false 8 Amortization - pension and OBEB plans, net of tax 3 us-gaap_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 1000000 1.0 true false false 6 false true false false 1000000 1.0 true false false 7 false true false false 0 0 true false false 8 false true false false 1000000 1.0 false false false xbrli:monetaryItemType monetary The adjustment out of other comprehensive income for prior service costs recognized as a component of net period benefit cost during the period, after tax. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 4 -Subparagraph c, d Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 52 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 17, 19, 24 false 9 Adjustment to unamortized OPEB plan actuarial loss, net of tax 3 aye_OtherComprehensiveIncomeAdjustmentToUnamortizedOtherPostEmploymentBenefitPlanActuarialLossNetOfTax aye false credit duration Other Comprehensive Income, Adjustment to unamortized other post employment benefit plan actuarial loss, net of tax false false false false false false false false false false false verboselabel false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 7800000 7.8 true false false 6 false true false false 7800000 7.8 true false false 7 false true false false 0 0 true false false 8 false true false false 7800000 7.8 false false false xbrli:monetaryItemType monetary Other Comprehensive Income, Adjustment to unamortized other post employment benefit plan actuarial loss, net of tax No authoritative reference available. false 10 Cash flow hedges, net of tax 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 22400000 22.4 true false false 6 false true false false 22400000 22.4 true false false 7 false true false false 0 0 true false false 8 false true false false 22400000 22.4 false false false xbrli:monetaryItemType monetary Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase (decrease) in deferred hedging gains or losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14, 17, 20, 26 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 31, 46 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 46 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 24 -Subparagraph b Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14, 17, 20, 24, 26 false 13 Dividends on common stock 3 us-gaap_DividendsCommonStock us-gaap true debit duration No definition available. false false false false false false false false false false true negated false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false -25500000 -25.5 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false -25500000 -25.5 true false false 7 false true false false 0 0 true false false 8 false true false false -25500000 -25.5 false false false xbrli:monetaryItemType monetary Aggregate cash, stock, and paid-in-kind dividends declared for common shareholders during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 14 Stock-based compensation expense: 3 us-gaap_ShareBasedCompensationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 15 Non-employee director stock awards (in shares) 4 aye_StockIssuedDuringPeriodSharesDirectorStockAward aye false na duration Represents the number of shares issued during the period for non-employee director stock awards. false false false false false false false false false false false terselabel false 1 false true false false 3000 3000 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Represents the number of shares issued during the period for non-employee director stock awards. No authoritative reference available. false 16 Non-employee director stock awards 4 aye_StockIssuedDuringPeriodValueDirectorStockAward aye false credit duration Par value stock issued during the period as a result of the issuance of non-employee director stock awards. false false false false false false false false false false false terselabel false 1 false true false false 0 0 true false false 2 false true false false 200000 0.2 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 200000 0.2 true false false 7 false true false false 0 0 true false false 8 false true false false 200000 0.2 false false false xbrli:monetaryItemType monetary Par value stock issued during the period as a result of the issuance of non-employee director stock awards. No authoritative reference available. false 17 Stock options 4 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 0 0 true false false 2 false true false false 3800000 3.8 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 3800000 3.8 true false false 7 false true false false 0 0 true false false 8 false true false false 3800000 3.8 false false false xbrli:monetaryItemType monetary This element represents the amount of recognized share-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 39 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A91 false 18 Performance shares 4 aye_NonVestedStockUnitAndPerformanceBasedAwardCompensation aye false credit duration Non-vested stock unit and performance-based award compensation. false false false false false false false false false false false terselabel false 1 false true false false 0 0 true false false 2 false true false false 4500000 4.5 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 4500000 4.5 true false false 7 false true false false 0 0 true false false 8 false true false false 4500000 4.5 false false false xbrli:monetaryItemType monetary Non-vested stock unit and performance-based award compensation. No authoritative reference available. false 19 Restricted shares (in shares) 4 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross us-gaap true na duration No definition available. false false false false false false false false false false false false 1 false true false false 0 0 true false false 2 false false false false 0 0   true false false 3 false false false false 0 0   true false false 4 false false false false 0 0   true false false 5 false false false false 0 0   true false false 6 false false false false 0 0   true false false 7 false false false false 0 0   true false false 8 false false false false 0 0   false false false xbrli:sharesItemType shares Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4, 5 false 20 Restricted shares 4 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 0 0 true false false 2 false true false false 200000 0.2 true false false 3 false true false false 0 0 true false false 4 false true false false -100000 -0.1 true false false 5 false true false false 0 0 true false false 6 false true false false 100000 0.1 true false false 7 false true false false 0 0 true false false 8 false true false false 100000 0.1 false false false xbrli:monetaryItemType monetary Aggregate value of stock related to Restricted Stock Awards issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 false 21 Exercise of stock options (in shares) 3 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 12148 12148 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Number of shares issued during the period as a result of the exercise of stock options. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 false 22 Exercise of stock options 3 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0 0 true false false 2 false true false false 200000 0.2 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 200000 0.2 true false false 7 false true false false 0 0 true false false 8 false true false false 200000 0.2 false false false xbrli:monetaryItemType monetary Value stock issued during the period as a result of the exercise of stock options. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 false 23 Issuance of performance shares (in shares) 3 aye_IssuanceOfPerformanceSharesInShares aye false na duration Issuance of performance shares false false false false false false false false false false false label false 1 false true false false 309798 309798 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Issuance of performance shares No authoritative reference available. false 24 Issuance of performance shares 3 aye_IssuanceOfPerformanceShares aye false credit duration Issuance of performance shares false false false false false false false false false false false label false 1 false true false false 400000 0.4 true false false 2 false true false false -4400000 -4.4 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false -4000000 -4.0 true false false 7 false true false false 0 0 true false false 8 false true false false -4000000 -4.0 false false false xbrli:monetaryItemType monetary Issuance of performance shares No authoritative reference available. false 25 Purchase of treasury shares (in shares) 3 us-gaap_TreasuryStockSharesAcquired us-gaap true na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -3642 -3642 true false false 2 false true false false 0 0 true false false 3 false true false false 0 0 true false false 4 false true false false 0 0 true false false 5 false true false false 0 0 true false false 6 false true false false 0 0 true false false 7 false true false false 0 0 true false false 8 false true false false 0 0 false false false xbrli:sharesItemType shares Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 false 26 Other 3 aye_Rounding aye false credit duration Rounding false false false false false false false false false false false terselabel false 1 false true false false 0 0 true false false 2 false true false false 0 0 true false false 3 false true false false 100000 0.1 true false false 4 false true false false 0 0 true false false 5 false true false false -100000 -0.1 true false false 6 false true false false 0 0 true false false 7 false true false false 0 0 true false false 8 false true false false 0 0 false false false xbrli:monetaryItemType monetary Rounding No authoritative reference available. false 29 Balance (in shares) at Sep. 30, 2010 3 aye_SharesOutstanding aye false na instant Number of shares of stock held by shareholders. false false false true false false false false false true false periodendlabel instant 2010-09-30T00:00:00 0001-01-01T00:00:00 false 1 false true false false 169936010 169936010 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 false false false xbrli:sharesItemType shares Number of shares of stock held by shareholders. No authoritative reference available. false 30 Balance at Sep. 30, 2010 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant No definition available. false false false true false false false false false true false periodendlabel instant 2010-09-30T00:00:00 0001-01-01T00:00:00 false 1 true true false false 212500000 212.5 true false false 2 true true false false 1984100000 1984.1 true false false 3 true true false false 1269900000 1269.9 true false false 4 true true false false -1900000 -1.9 true false false 5 true true false false -33100000 -33.1 true false false 6 true true false false 3431500000 3431.5 true false false 7 true true false false 0 0 true false false 8 true true false false 3431500000 3431.5 false false false xbrli:monetaryItemType monetary Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 25 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 26 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A false 8 81 false HundredThousands NoRounding UnKnown false true