XML 111 R81.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Employee Stock Purchase and Stock Incentive Plans - Stock Issuance Activity Under the ESPP (Details) - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2022 | Oct. 01, 2021 | Oct. 02, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Discount (percent) available to employees on the purchase of common stock | 5.00% |  |
Aggregate Purchase Price Paid for Shares Sold (in shares) | $ 38,648,000 | $ 32,149,000 | $ 27,813,000
Aggregate Number of Shares Sold (in shares) | 302,429 | 287,587 | 333,078
Number of remaining shares reserved for issuance (in shares) | 4,487,176 |  |
ESPP's |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of remaining shares reserved for issuance (in shares) | 2,875,448 |  |

X
- Definition Aggregate Number Of Shares Sold + References No definition available. + Details
Name: | jec_AggregateNumberOfSharesSold
Namespace Prefix: | jec_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate Purchase Price Paid For Shares Sold + References No definition available. + Details
Name: | jec_AggregatePurchasePricePaidForSharesSold
Namespace Prefix: | jec_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Employee Right To Purchase Stock At Discount Rate + References No definition available. + Details
Name: | jec_EmployeeRightToPurchaseStockAtDiscountRate
Namespace Prefix: | jec_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis=jec_EmployeeStockPurchasePlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |