XML 150 R121.htm IDEA: XBRL DOCUMENT
v3.20.2

Contractual Guarantees, Litigation, Investigations, and Insurance (Details) |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 27, 2019 USD ($) | Aug. 30, 2019 USD ($) | Aug. 31, 2017 USD ($) | Oct. 02, 2020 USD ($) case | Sep. 27, 2019 USD ($) | Sep. 28, 2018 USD ($) | Sep. 28, 2012 MW
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Selling, general and administrative expenses |  |  |  | $ 2,050,695,000 | $ 2,072,177,000 | $ 1,771,107,000 |
Nui Phao Mining Company |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Litigation settlement amount awarded to other party |  | $ 130,000,000.0 |  |  |  |  |
Selling, general and administrative expenses | $ 40,000,000.0 |  |  | $ 40,000,000.0 |  |  |
JKC Australia L N G Pty Limited | Pending Litigation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Damages sought |  |  | $ 1,700,000,000 |  |  |  |
General Electric And G E Electrical International Incorporation | Pending Litigation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Plant capacity (in MW) | MW |  |  |  |  |  |  | 360
General Electric And G E Electrical International Incorporation | Pending Litigation | Minimum |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Damages sought |  |  | $ 530,000,000.0 |  |  |  |
Kingston Power Plant of the TVA, Primary Case Greg Adkisson, ET AL v. Jacobs Engineering Group Inc. |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Number of cases | case |  |  |  | 6 |  |  |
Kingston Power Plant of the TVA, Secondary Case No. 3:13CV-505-TAV-HBG |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Number of cases | case |  |  |  | 10 |  |  |

X
- Definition Public Utility, Plant Capacity + References No definition available. + Details
Name: | jec_PublicUtilityPlantCapacity
Namespace Prefix: | jec_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount awarded to other party in judgment or settlement of litigation. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix: | us-gaap_
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_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 + Details
Name: | us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
Name: | us-gaap_SellingGeneralAndAdministrativeExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_LitigationCaseAxis=jec_NuiPhaoMiningCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=jec_JKCAustraliaLNGPtyLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=jec_GeneralElectricAndGEElectricalInternationalIncorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=jec_KingstonPowerPlantoftheTVAPrimaryCaseGregAdkissonETALv.JacobsEngineeringGroupInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=jec_KingstonPowerPlantOfTheTVASecondaryCaseNo313CV505TAVHBGMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |