Amount of credit facility retired.

No definition available.

Name:	jci_AmountOfCreditFacilityRetired
Namespace Prefix:	jci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Length of Credit Facility

+ References

No definition available.

+ Details

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Namespace Prefix:	jci_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

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

- 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

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

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

Name:	us-gaap_ExtinguishmentOfDebtAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Maximum amount borrowed under the credit facility at any time during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Line-of-Credit Arrangement
-URI http://asc.fasb.org/extlink&oid=6517033

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20
-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
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-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Balance Type:	credit
Period Type:	duration

Debt and Financing Arrangements Financing Arrangements (Details) ¥ in Billions	3 Months Ended							6 Months Ended	12 Months Ended
	Sep. 30, 2015 USD ($)	Jun. 30, 2015 EUR (€)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2013 EUR (€)	Mar. 31, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2015 EUR (€)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 EUR (€)	Jun. 30, 2015 JPY (¥)	Sep. 30, 2014 EUR (€)
135 million USD revolving credit facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period											$ 0
Amount of credit facility	$ 135,000,000								$ 135,000,000
185 million USD revolving credit facility
Debt Instrument [Line Items]
Amount of credit facility											185,000,000
1.4% Due in 2018
Debt Instrument [Line Items]
Long-term Debt	303,000,000								303,000,000		298,000,000
Proceeds from Issuance of Unsecured Debt					$ 300,000,000
Debt instrument, face amount	$ 300,000,000								$ 300,000,000		$ 300,000,000
Interest rate on notes	1.40%				1.40%				1.40%		1.40%	1.40%		1.40%
3.625% Due in 2024
Debt Instrument [Line Items]
Long-term Debt	$ 500,000,000								$ 500,000,000		$ 500,000,000
Proceeds from Issuance of Unsecured Debt					$ 500,000,000
Debt instrument, face amount	$ 500,000,000								$ 500,000,000		$ 500,000,000
Interest rate on notes	3.625%				3.625%				3.625%		3.625%	3.625%		3.625%
237 Million Euro Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period \| €										€ 0
Amount of credit facility \| €												€ 237,000,000		€ 237,000,000
4.625% Due in 2044
Debt Instrument [Line Items]
Long-term Debt	$ 447,000,000								$ 447,000,000		$ 447,000,000
Proceeds from Issuance of Unsecured Debt					$ 450,000,000
Debt instrument, face amount	$ 450,000,000								$ 450,000,000		$ 450,000,000
Interest rate on notes	4.625%				4.625%				4.625%		4.625%	4.625%		4.625%
4.95% Due in 2064
Debt Instrument [Line Items]
Long-term Debt	$ 449,000,000								$ 449,000,000		$ 449,000,000
Proceeds from Issuance of Unsecured Debt					$ 450,000,000
Debt instrument, face amount	$ 450,000,000								$ 450,000,000		$ 450,000,000
Interest rate on notes	4.95%				4.95%				4.95%		4.95%	4.95%		4.95%
1.75 % Due in 2014
Debt Instrument [Line Items]
Debt retired, amount								$ 450,000,000
Interest rate on notes						1.75%		1.75%
Floating Rate Notes Due in 2014
Debt Instrument [Line Items]
Debt retired, amount								$ 350,000,000
Revolving Credit Facility Expiring September 2015
Debt Instrument [Line Items]
Debt retired, amount				$ 50,000,000
Revolving Credit Facility Expiring September 2015 \| 50 Million USD Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period
Floating Rate Credit Facility Expiring December 2014
Debt Instrument [Line Items]
Debt retired, amount					$ 150,000,000
Floating Rate Credit Facility Expiring December 2019
Debt Instrument [Line Items]
Line of Credit, Current \| €							€ 220,000,000
Amount of credit facility \| €							€ 220,000,000
Length of Credit Facility							5 years
Committed Five-year Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period									$ 0		$ 0
Amount of credit facility	$ 2,500,000,000								2,500,000,000
Length of Credit Facility	5 years
Air Distribution Technologies, Inc.
Debt Instrument [Line Items]
Debt instrument, face amount	$ 1,700,000,000								1,700,000,000
Floating Rate Credit Facility
Debt Instrument [Line Items]
Amount Of Credit Facility Retired											150,000,000
90 million USD revolving credit facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period			$ 90,000,000
Debt Instrument, Term			1 year
Amount of credit facility			$ 90,000,000
Debt retired, amount									90,000,000
500 million USD floating rate term loan maturing in September 2015
Debt Instrument [Line Items]
Debt retired, amount									500,000,000
150 million USD floating rate term loan maturing in September 2015
Debt Instrument [Line Items]
Debt retired, amount									150,000,000
70 million euro floating rate credit facility
Debt Instrument [Line Items]
Repayments of Lines of Credit \| €		€ 32,000,000
Amount of credit facility \| €		€ 70,000,000
100 million USD floating rate term loan maturing in September 2015
Debt Instrument [Line Items]
Debt retired, amount									$ 100,000,000
37 billion yen floating rate syndicated term loan maturing in June 2020
Debt Instrument [Line Items]
Debt Instrument, Term		5 years
Long-term Debt \| ¥													¥ 37
Floating Rate Credit Facility Expiring December 2014
Debt Instrument [Line Items]
Amount of credit facility						$ 150,000,000		$ 150,000,000
Length of Credit Facility						9 months
7.7 % Due in 2015
Debt Instrument [Line Items]
Debt retired, amount			$ 125,000,000
Interest rate on notes			7.70%
Revolving Credit Facility Expiring September 2014
Debt Instrument [Line Items]
Amount Of Credit Facility Retired											$ 500,000,000