XML 91 R75.htm IDEA: XBRL DOCUMENT
v3.20.4

Derivative Instruments and Hedging Activities - Net Investment Hedges (Detail) - Foreign Currency Denominated Debt [Member] € in Millions, ¥ in Billions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 EUR (€) | Dec. 31, 2020 JPY (¥) | Sep. 30, 2020 EUR (€) | Sep. 30, 2020 JPY (¥)
888 million euro net investment hedge [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount | € 888 |  | € 888 |
500 million euro net investment hedge [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount | 500 |  | 500 |
500 million euro net investment hedge #2 [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount | 500 |  | 500 |
423 million euro net investment hedge [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount | 423 |  | 423 |
54 million euro net investment hedge [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount | € 54 |  | € 54 |
25 billion yen net investment hedge [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount | ¥ |  | ¥ 25 |  | ¥ 25

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

X
- Definition Nominal or face amount used to calculate payments on a nonderivative instrument. + References No definition available. + Details
Name: | us-gaap_NotionalAmountOfNonderivativeInstruments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=jci_A888MillionEuroNetInvestmentHedgeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=jci_ForeignCurrencyDenominatedDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=jci_A500MillionEuroNetInvestmentHedgeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=jci_A500MillionEuroNetInvestmentHedge2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=jci_A423millioneuronetinvestmenthedgeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=jci_A54millioneuronetinvestmenthedgeMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=jci_A25BillionYenNetInvestmentHedgeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |