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| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE BANK OF NEW YORK MELLON SERVES AS DIRECTED TRUSTEE OF THIS TRUST. THE PLAN SPONSOR IS ALLEGHENY LUDLUM, LLC. THE PLAN IS ADMINISTERED BY THE PLAN SPONSOR IN ACCORDANCE WITH THE TERMS OF THE TRUST AGREEMENT. AS SUCH, THE VEBA DOES NOT HAVE A GOVERNING BODY THAT EXERCISES DISCRETION. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | A COMPLETE ELECTRONIC COPY OF THE ORGANIZATION'S FORM 990 WAS PROVIDED TO THE TRUSTEE FOR REVIEW PRIOR TO FILING WITH THE IRS. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | THESE QUESTIONS ARE NOT APPLICABLE TO THE TRUST. ADDITIONALLY, THE TRUST DOES NOT HAVE ANY EMPLOYEES, THEREFORE, NO PROCESSES RELATED TO EMPLOYEE COMPENSATION ARE IN PLACE. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | AS A 501(C)(9) ORGANIZATION, THIS TRUST IS NOT REQUIRED TO MAKE THE DOCUMENTS REFERENCED IN QUESTION 19 AVAILABLE TO THE GENERAL PUBLIC. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | AVERAGE HOURS PER WEEK DEVOTED TO POSITION: AS TRUSTEE, THE BANK OF NEW YORK MELLON PROVIDES ADMINISTRATIVE SERVICES SUCH AS ACTING AS INVESTMENT MANAGER FOR ALC COLLECTIVE BARGAINED VEBA. THESE SERVICES REQUIRE NUMEROUS INDIVIDUAL BANK EMPLOYEES' INVOLVEMENT IN THE ACTIVITIES OF THE ORGANIZATION AND THUS CANNOT BE QUANTIFIED ON AN HOURLY BASIS, BUT ARE CALCULATED BASED UPON FACTORS SUCH AS THE MARKET VALUE OF THE ACCOUNT AND IN ACCORDANCE WITH THE BANK OF NEW YORK MELLON'S AGREEMENT WITH ALLEGHENY LUDLUM, LLC. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 5 | MODIFIED CASH BASIS |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION A, LINES 1A & B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PART VI, SECTIONS A & B, LINES 8, 12-15 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | FORM 990, PART VI, SECTION C, LINE 19 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | FORM 990, PART VII, SECTION A, LINE 1A, COLUMN (B) |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 5 | FORM 990, PART XII, LINE 1 |
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| ReturnHeader/BuildTS | 0 | 2019-02-21 02:37:17Z |
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| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | C/O THE BNYM PO BOX 535007 |
| ReturnHeader/Filer/USAddress/CityNm | 0 | PITTSBURGH |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | PA |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 152535007 |
| ReturnHeader/FilingSecurityInformation/AtSubmissionCreationDeviceId | 0 | 0B7856F93E1FE286AA9E05E777D02CCD0323C704 |
| ReturnHeader/FilingSecurityInformation/AtSubmissionFilingDeviceId | 0 | 0B7856F93E1FE286AA9E05E777D02CCD0323C704 |
| ReturnHeader/FilingSecurityInformation/FederalOriginalSubmissionId | 0 | 25553720183175000009 |
| ReturnHeader/FilingSecurityInformation/FederalOriginalSubmissionIdDt | 0 | 2018-11-13 |
| ReturnHeader/FilingSecurityInformation/FilingLicenseTypeCd | 0 | P |
| ReturnHeader/FilingSecurityInformation/IPAddress/IPv4AddressTxt | 0 | 164.57.159.253 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt | 0 | ERNST & YOUNG US LLP |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt | 0 | 2100 ONE PPG PLACE |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm | 0 | PITTSBURGH |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd | 0 | PA |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd | 0 | 15222 |
| ReturnHeader/PreparerPersonGrp/PhoneNum | 0 | 4126447800 |
| ReturnHeader/PreparerPersonGrp/PreparerPersonNm | 0 | EILEEN WEBB |
| ReturnHeader/ReturnTs | 0 | 2018-11-13T13:15:16-06:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990 |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2017-01-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2017-12-31 |
| ReturnHeader/TaxYr | 0 | 2017 |