[Line Items] for Fair Value Measurements, Fixed Rate Bonds [Table]

No definition available.

Name:	jci_FairValueMeasurementsFixedRateBondsLineItems
Namespace Prefix:	jci_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ 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 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of the hedged item as of the balance sheet date related to the derivative. For example, the hedged balance on a debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeAmountOfHedgedItem
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of interest rate derivative instruments held by the entity at the reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959

+ Details

Name:	us-gaap_NumberOfInterestRateDerivativesHeld
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=jci_FivePointFivePercentDueTwoThousandSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=jci_TwoPointSixPercentDueTwoThousandSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=jci_OnePointFourPercentDueTwoThousandEighteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=jci_SevenPointOneTwoFivePercentDueTwoThousandSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Fair Value Measurements Fair Value Measurements - Fixed Rate Bonds (Details) $ in Millions	Mar. 31, 2016 Swap	Sep. 30, 2015 Swap	Mar. 31, 2015 Swap	Jun. 30, 2014 USD ($) Swap	Sep. 30, 2013 USD ($) Swap
Fair Value Measurements, Fixed Rate Bonds [Line Items]
Number of Interest Rate Derivatives Held	8	12	12
5.5% due 2016 \| Interest Rate Swaps
Fair Value Measurements, Fixed Rate Bonds [Line Items]
Derivative, Amount of Hedged Item \| $					$ 800
Debt Instrument, Interest Rate, Stated Percentage					5.50%
Number of Interest Rate Derivatives Held					4
2.6% due 2017 \| Interest Rate Swaps
Fair Value Measurements, Fixed Rate Bonds [Line Items]
Derivative, Amount of Hedged Item \| $				$ 400
Debt Instrument, Interest Rate, Stated Percentage				2.60%
Number of Interest Rate Derivatives Held				4
1.4% due 2018 \| Interest Rate Swaps
Fair Value Measurements, Fixed Rate Bonds [Line Items]
Derivative, Amount of Hedged Item \| $				$ 300
Debt Instrument, Interest Rate, Stated Percentage				1.40%
Number of Interest Rate Derivatives Held				3
7.125% due 2017 \| Interest Rate Swaps
Fair Value Measurements, Fixed Rate Bonds [Line Items]
Derivative, Amount of Hedged Item \| $				$ 150
Debt Instrument, Interest Rate, Stated Percentage				7.125%
Number of Interest Rate Derivatives Held				1