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

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- Definition

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

+ References

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-Topic 210
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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.

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No definition available.

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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
-Section 45
-Paragraph 15
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Debt and Financing Arrangements Financing Arrangements (Details)	1 Months Ended	3 Months Ended	12 Months Ended
	Jul. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2020 EUR (€)	Sep. 30, 2020 EUR (€)
$500 million due March 2020 [Member]
Debt Instrument [Line Items]
Repayments of Debt		$ 500,000,000
Interest rate on notes		5.00%
$300 million bank term loan [Member]
Debt Instrument [Line Items]
Repayments of Debt	$ 300,000,000
$275 million bank term loan [Member]
Debt Instrument [Line Items]
Repayments of Debt			$ 275,000,000
$675 million European financing arrangements due September 2020 [Member]
Debt Instrument [Line Items]
Repayments of Debt			675,000,000
$750 Million Euro Notes Due December 2020 [Member]
Debt Instrument [Line Items]
Repayments of Debt \| €				€ 750,000,000
Johnson Controls International plc [Member] \| Three Point Six Two Five Percent Due Two Thousand Twenty Four [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			$ 453,000,000
Interest rate on notes			3.625%		3.625%
Johnson Controls International plc [Member] \| Four Point Nine Five Percent Due Two Thousand Sixty Four [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			$ 341,000,000
Interest rate on notes			4.95%		4.95%
Johnson Controls International plc [Member] \| Zero Point Zero Percent Due Two Thousand Twenty-One [Member]
Debt Instrument [Line Items]
Debt instrument, face amount \| €					€ 750,000,000
Interest rate on notes			0.00%		0.00%
Johnson Controls International plc (JCI) and Tyco Fire & Security Finance S.C.A. (TFSCA) \| Zero Point Three Seven Five Percent Due Two Thousand Twenty Seven
Debt Instrument [Line Items]
Debt instrument, face amount \| €					€ 500,000,000
Interest rate on notes			0.375%		0.375%
Johnson Controls International plc (JCI) and Tyco Fire & Security Finance S.C.A. (TFSCA) \| One Point Zero Percent Due Two Thousand Thirty Two
Debt Instrument [Line Items]
Debt instrument, face amount \| €					€ 500,000,000
Interest rate on notes			1.00%		1.00%
Johnson Controls International plc (JCI) and Tyco Fire & Security Finance S.C.A. (TFSCA) \| One Point Seven Five Percent Due Two Thousand Thirty
Debt Instrument [Line Items]
Debt instrument, face amount			$ 625,000,000
Interest rate on notes			1.75%		1.75%