XML 96 R80.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Pension and Other Postretirement Benefit Plans - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 28, 2018 | Sep. 29, 2017 | Sep. 30, 2016
Defined Benefit Plan Disclosure [Line Items] |  |  |
Loss (gain) on pension plan changes | $ 5,414 | $ (9,955) | $ 0
Total Other Non-current Assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Restricted investments |  | 7,700 |
Employee loans receivable |  | 2,200 |
SG&A Expense |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
One-time, non-cash benefit |  | 9,900 |
U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Curtailments/settlements/plan amendments | $ (9,434) | 0 |
Period of annual average returns used in return on plan assets simulation model (in years) | 20 years |  |
Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Curtailments/settlements/plan amendments | $ (5,496) | $ (228) |
Non-U.S. Plans | Sverdrup and Ireland |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Loss (gain) on pension plan changes | $ 5,400 |  |

X
- Definition Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment, Settlements and Plan Amendments 1 + References No definition available. + Details
Name: | jec_DefinedBenefitPlanBenefitObligationIncreaseDecreaseforCurtailmentSettlementsandPlanAmendments1
Namespace Prefix: | jec_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Defined Benefit Plan Period Of Annual Average Returns Used In Return On Plan Assets Simulation Model + References No definition available. + Details
Name: | jec_DefinedBenefitPlanPeriodOfAnnualAverageReturnsUsedInReturnOnPlanAssetsSimulationModel
Namespace Prefix: | jec_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition One Time Non Cash Employee Benefit + References No definition available. + Details
Name: | jec_OneTimeNonCashEmployeeBenefit
Namespace Prefix: | jec_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amounts due from an Entity employee, not to include stockholders or officers, which are usually due after 1 year (or 1 business cycle). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(a)(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(11)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864 + Details
Name: | us-gaap_DueFromEmployeesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of cost (reversal of cost) for pension benefits. Excludes other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(2)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(4)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_PensionExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet. + References No definition available. + Details
Name: | us-gaap_RestrictedInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=jec_SverdrupandIrelandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |