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Number of acquisitions which increased Company's ownership from noncontrolling to controlling interest

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Number of businesses divested.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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-Publisher FASB

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In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

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Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The number of businesses acquired by the entity during the period.

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The net cash inflow or outflow associated with the aggregate amount of adjustment to the purchase price of a previous acquisition.

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-Publisher FASB

-Name Accounting Standards Codification

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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Acquisitions and Divestitures - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013 Acquisition	Sep. 30, 2014	Mar. 31, 2015
Acquisitions And Discontinued Operations [Line Items]
Cash paid for business acquisition	$ 13	$ 128
Goodwill recorded in connection with business acquisitions	14us-gaap_GoodwillAcquiredDuringPeriod		875us-gaap_GoodwillAcquiredDuringPeriod
Aggregate non-cash gain recorded due to acquisition	0	19
Number of divestitures		1jci_NumberOfBusinessesDivested
Sales price of divestiture	0	13
Gain (loss) on business divestitures - net		9us-gaap_GainLossOnSaleOfBusiness
Reduction in goodwill related to business divestitures	9	0	265
Individually Immaterial Acquisitions
Acquisitions And Discontinued Operations [Line Items]
Number of acquisitions	2	2
Purchase price, net of cash acquired	38	128
Cash paid for business acquisition	9
Goodwill recorded in connection with business acquisitions	9	102
Adjustment to purchase price of previous acquisition	4
Goodwill adjustment related to previous acquisition	5	2
Number of acquisitions which increased Company's ownership from noncontrolling to controlling interest		1
Aggregate non-cash gain recorded due to acquisition		19
Subsequent Event
Acquisitions And Discontinued Operations [Line Items]
Sales price of divestiture				$ 200