XML 92 R82.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Segment Information - Additional Information (Detail) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 Segment | Jun. 30, 2018 Segment Business | Jun. 30, 2017 Segment
Segment Reporting Information [Line Items] |  |  |
Number of primary businesses | Business |  | 2 |
Number of reportable segments |  | 5 |
Building Technologies & Solutions |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of reportable segments | 4 |  | 5

X
- Definition Number of primary businesses. + References No definition available. + Details
Name: | jci_NumberOfPrimaryBusinesses
Namespace Prefix: | jci_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
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_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | jci_PrimaryBusinessInformationByPrimaryBusinessAxis=jci_BuildingTechnologiesSolutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |