Johnson Controls 10-Q 29 Apr 16 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Mar. 31, 2016shares
Document and Entity Information [Abstract]
Entity Registrant Name	JOHNSON CONTROLS INC
Entity Central Index Key	53,669
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Trading Symbol	JCI
Amendment Flag	false
Entity Common Stock, Shares Outstanding	648,370,147

Consolidated Statements of Fina

Consolidated Statements of Financial Position - USD ($) $ in Millions	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
Assets
Cash and cash equivalents	$ 358	$ 597	$ 164
Accounts receivable - net	5,987	5,751	5,384
Inventories	2,922	2,377	2,414
Assets held for sale	17	55	1,969
Other current assets	1,774	1,689	1,790
Current assets	11,058	10,469	11,721
Property, plant and equipment - net	6,397	5,870	5,870
Goodwill	7,042	6,824	6,788
Other intangible assets - net	1,576	1,516	1,558
Investments in partially-owned affiliates	2,736	2,143	1,239
Noncurrent assets held for sale	0	0	693
Other noncurrent assets	2,390	2,773	3,091
Total assets	31,199	29,595	30,960
Liabilities and Equity
Short-term debt	1,236	52	1,321
Current portion of long-term debt	647	813	815
Accounts payable	5,360	5,174	4,640
Accrued compensation and benefits	947	1,090	815
Liabilities held for sale	0	42	1,511
Other current liabilities	3,602	3,275	2,807
Current liabilities	11,792	10,446	11,909
Long-term debt	5,143	5,745	5,448
Pension and postretirement benefits	781	767	785
Other noncurrent liabilities	2,364	1,886	1,834
Long-term liabilities	8,288	8,398	8,067
Redeemable noncontrolling interests	237	212	202
Common stock, $1.00 par value	718	717	713
Capital in excess of par value	3,088	3,030	2,895
Retained earnings	10,380	10,838	10,649
Treasury stock, at cost	(3,163)	(3,152)	(2,598)
Accumulated other comprehensive loss	(1,039)	(1,057)	(1,076)
Shareholders' equity attributable to Johnson Controls, Inc.	9,984	10,376	10,583
Noncontrolling interests	898	163	199
Total equity	10,882	10,539	10,782
Total liabilities and equity	$ 31,199	$ 29,595	$ 30,960

Consolidated Statements of Fin3

Consolidated Statements of Financial Position (Parenthetical) - $ / shares	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
Statement of Financial Position [Abstract]
Common stock, par value	$ 1	$ 1	$ 1

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Net sales
Products and systems	[1]	$ 8,161	$ 8,292	$ 16,214	$ 17,015
Services	[1]	870	906	1,746	1,807
Net sales		9,031	9,198	17,960	18,822
Cost of sales
Products and systems	[1]	6,707	7,004	13,404	14,410
Services	[1]	595	621	1,194	1,230
Cost of sales		7,302	7,625	14,598	15,640
Gross profit		1,729	1,573	3,362	3,182
Selling, general and administrative expenses		(1,144)	(975)	(2,226)	(1,980)
Restructuring Charges		(229)	0	(229)	0
Net financing charges		(74)	(69)	(142)	(140)
Equity income		117	82	253	184
Income from continuing operations before income taxes		399	611	1,018	1,246
Income tax provision		868	132	997	250
Net income (loss) from continuing operations		(469)	479	21	996
Income from discontinued operations, net of tax (Note 4)		0	78	0	107
Net income (loss)		(469)	557	21	1,103
Income from continuing operations attributable to noncontrolling interests		61	27	101	63
Income from discontinued operations attributable to noncontrolling interests		0	1	0	4
Net income (loss) attributable to Johnson Controls, Inc.		(530)	529	(80)	1,036
Amounts attributable to Johnson Controls, Inc. common shareholders
Income (loss) from continuing operations		(530)	452	(80)	933
Income from discontinued operations		$ 0	$ 77	$ 0	$ 103
Earnings (loss) per share
Basic earnings (loss) per share from continuing operations		$ (0.82)	$ 0.69	$ (0.12)	$ 1.42
Basic earnings per share from discontinued operations		0	0.12	0	0.16
Basic earnings (loss) per share	[2]	(0.82)	0.81	(0.12)	1.57
Diluted earnings (loss) per share from continuing operations		(0.82)	0.68	(0.12)	1.40
Diluted earnings per share from discontinued operations		0	0.12	0	0.15
Diluted earnings (loss) per share	[2]	$ (0.82)	$ 0.80	$ (0.12)	$ 1.56
[1]	Products and systems consist of Automotive Experience and Power Solutions products and systems and Building Efficiency installed systems. Services are Building Efficiency technical services.
[2]	Certain items do not sum due to rounding

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (469)	$ 557	$ 21	$ 1,103
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	203	(504)	26	(855)
Realized and unrealized gains (losses) on derivatives	5	7	2	(3)
Pension and postretirement plans	0	0	0	(3)
Other comprehensive income (loss)	208	(497)	28	(861)
Total comprehensive income (loss)	(261)	60	49	242
Comprehensive income attributable to noncontrolling interests	90	6	111	45
Comprehensive income (loss) attributable to Johnson Controls, Inc.	$ (351)	$ 54	$ (62)	$ 197

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Operating Activities
Net income (loss) attributable to Johnson Controls, Inc.	$ (530)	$ 529	$ (80)	$ 1,036
Income from continuing operations attributable to noncontrolling interests	61	27	101	63
Income from discontinued operations attributable to noncontrolling interests	0	1	0	4
Net income (loss)	(469)	557	21	1,103
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	219	205	445	429
Pension and postretirement benefit income	(17)	(1)	(34)	(15)
Pension and postretirement contributions	(34)	(28)	(53)	(52)
Equity in earnings of partially-owned affiliates, net of dividends received	(97)	(77)	(207)	(169)
Deferred income taxes	345	152	331	248
Non-cash restructuring and impairment costs	29	0	29	0
Gain on divestitures	0	(200)	0	(200)
Fair value adjustment of equity investment	4	0	4	0
Equity-based compensation	23	25	51	46
Other	4	4	5	(1)
Changes in assets and liabilities, excluding acquisitions and divestitures:
Receivables	(124)	(299)	75	111
Inventories	(98)	(81)	(168)	(101)
Other assets	242	22	134	(107)
Restructuring reserves	141	(68)	67	(145)
Accouns payable and accrued liabilities	83	246	(311)	(456)
Accrued income taxes	391	(97)	240	(491)
Cash provided by operating activities	634	360	621	200
Investing Activities
Capital expenditures	(261)	(294)	(543)	(556)
Sale of property, plant and equipment	5	3	14	17
Acquisition of businesses, net of cash acquired	0	(9)	(133)	(22)
Business divestitures	22	141	40	141
Changes in long-term investments	0	(47)	0	(45)
Other	1	6	5	11
Cash used by investing activities	(233)	(200)	(617)	(454)
Financing Activities
Increase in short-term debt - net	619	267	1,140	1,165
Repayment of long-term debt	(807)	(131)	(814)	(140)
Stock repurchases	0	(210)	0	(810)
Payment of cash dividends	(188)	(171)	(356)	(317)
Proceeds from the exercise of stock options	4	57	20	162
Dividends paid to noncontrolling interests	(73)	(9)	(227)	(20)
Other	(3)	(25)	3	(33)
Cash provided (used) by financing activities	(448)	(222)	(234)	7
Effect of exchange rate changes on cash and cash equivalents	(9)	39	(9)	(18)
Cash held for sale	0	19	0	20
Decrease in cash and cash equivalents	(56)	(4)	(239)	(245)
Cash and cash equivalents at beginning of period	414	168	597	409
Cash and cash equivalents at end of period	$ 358	$ 164	$ 358	$ 164

Financial Statements

Financial Statements	6 Months Ended
	Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Financial Statements	Financial Statements In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments (which include normal recurring adjustments) necessary to present fairly the financial position, results of operations and cash flows for the periods presented. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) have been omitted pursuant to the rules and regulations of the United States Securities and Exchange Commission (SEC). These consolidated financial statements should be read in conjunction with the audited financial statements and notes thereto included in the Johnson Controls, Inc. (the "Company") Annual Report on Form 10-K for the year ended September 30, 2015 filed with the SEC on November 18, 2015, portions of which (including Part I, Item 1. Business, and the following items from Part II of the Annual Report: Item 6. Selected Financial Data, Item 7. Management’s Discussion and Analysis and Item 8. Financial Statements and Supplementary Data) were recast in the Company's Current Report on Form 8-K filed with the SEC on March 3, 2016. The results of operations for the three and six month periods ended March 31, 2016 are not necessarily indicative of results for the Company’s 2016 fiscal year because of seasonal and other factors. The consolidated financial statements include the accounts of Johnson Controls, Inc. and its domestic and non-U.S. subsidiaries that are consolidated in conformity with U.S. GAAP. All significant intercompany transactions have been eliminated. Investments in partially-owned affiliates are accounted for by the equity method when the Company’s interest exceeds 20% and the Company does not have a controlling interest. Under certain criteria as provided for in Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 810, "Consolidation," the Company may consolidate a partially-owned affiliate. To determine whether to consolidate a partially-owned affiliate, the Company first determines if the entity is a variable interest entity (VIE). An entity is considered to be a VIE if it has one of the following characteristics: 1) the entity is thinly capitalized; 2) residual equity holders do not control the entity; 3) equity holders are shielded from economic losses or do not participate fully in the entity’s residual economics; or 4) the entity was established with non-substantive voting rights. If the entity meets one of these characteristics, the Company then determines if it is the primary beneficiary of the VIE. The party with the power to direct activities of the VIE that most significantly impact the VIE’s economic performance and the potential to absorb benefits or losses that could be significant to the VIE is considered the primary beneficiary and consolidates the VIE. If the entity is not considered a VIE, then the Company applies the voting interest model to determine whether or not the Company shall consolidate the partially-owned affiliate. Consolidated VIEs Based upon the criteria set forth in ASC 810, the Company has determined that it was the primary beneficiary in three VIEs for the reporting periods ended March 31, 2016 , September 30, 2015 and March 31, 2015 , as the Company absorbs significant economics of the entities and has the power to direct the activities that are considered most significant to the entities. Two of the VIEs manufacture products in North America for the automotive industry. The Company funds the entities’ short term liquidity needs through revolving credit facilities and has the power to direct the activities that are considered most significant to the entities through its key customer supply relationships. In fiscal 2012, a pre-existing VIE accounted for under the equity method was reorganized into three separate investments as a result of the counterparty exercising its option to put its interest to the Company. The Company acquired additional interests in two of the reorganized group entities. The reorganized group entities are considered to be VIEs as the other owner party has been provided decision making rights but does not have equity at risk. The Company is considered the primary beneficiary of one of the entities due to the Company’s power pertaining to decisions over significant activities of the entity. As such, this VIE has been consolidated within the Company’s consolidated statements of financial position. The impact of consolidation of the entity on the Company’s consolidated statements of income for the three and six month periods ended March 31, 2016 and 2015 was not material. The VIE is named as a co-obligor under a third party debt agreement in the amount of $154 million , maturing in fiscal 2020, under which it could become subject to paying more than its allocated share of the third party debt in the event of bankruptcy of one or more of the other co-obligors. The other co-obligors, all related parties in which the Company is an equity investor, consist of the remaining group entities involved in the reorganization. As part of the overall reorganization transaction, the Company has also provided financial support to the group entities in the form of loans totaling $61 million , which are subordinate to the third party debt agreement. The Company is a significant customer of certain co-obligors, resulting in a remote possibility of loss. Additionally, the Company is subject to a floor guaranty expiring in fiscal 2022; in the event that the other owner party no longer owns any part of the group entities due to sale or transfer, the Company has guaranteed that the proceeds received from the sale or transfer will not be less than $25 million . The Company has partnered with the group entities to design and manufacture battery components for the Power Solutions business. The carrying amounts and classification of assets (none of which are restricted) and liabilities included in the Company’s consolidated statements of financial position for the consolidated VIEs are as follows (in millions): March 31, 2016 September 30, 2015 March 31, 2015 Current assets $ 308 $ 281 $ 269 Noncurrent assets 123 128 134 Total assets $ 431 $ 409 $ 403 Current liabilities $ 225 $ 232 $ 200 Noncurrent liabilities 32 34 35 Total liabilities $ 257 $ 266 $ 235 The Company did not have a significant variable interest in any other consolidated VIEs for the presented reporting periods. Nonconsolidated VIEs As mentioned previously within the "Consolidated VIEs" section above, in fisca1 2012, a pre-existing VIE was reorganized into three separate investments as a result of the counterparty exercising its option to put its interest to the Company. The reorganized group entities are considered to be VIEs as the other owner party has been provided decision making rights but does not have equity at risk. The Company is not considered to be the primary beneficiary of two of the entities as the Company cannot make key operating decisions considered to be most significant to the VIEs. Therefore, the entities are accounted for under the equity method of accounting as the Company’s interest exceeds 20% and the Company does not have a controlling interest. The Company’s maximum exposure to loss includes the partially-owned affiliate investment balance of $64 million , $62 million and $60 million at March 31, 2016 , September 30, 2015 and March 31, 2015 , respectively, as well as the subordinated loan from the Company, third party debt agreement and floor guaranty mentioned previously within the "Consolidated VIEs" section above. Current liabilities due to the VIEs are not material and represent normal course of business trade payables for all presented periods. The Company did not have a significant variable interest in any other unconsolidated VIEs for the presented reporting periods. Retrospective Changes Effective October 1, 2015, the Company reorganized the reportable segments within its Building Efficiency business to align with its new management reporting structure and business activities. Prior to this reorganization, Building Efficiency was comprised of three reportable segments for financial reporting purposes: North America Systems and Service, Asia and Other. As a result of this change, Building Efficiency is now comprised of four reportable segments for financial reporting purposes: Systems and Service North America, Products North America, Asia and Rest of World. Historical information has been revised to reflect the new Building Efficiency reportable segments. Refer to Note 7, "Goodwill and Other Intangible Assets," and Note 18, "Segment Information," of the notes to consolidated financial statements for further information. In November 2015, the FASB issued Accounting Standards Update (ASU) No. 2015-17, "Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes." ASU No. 2015-17 requires that deferred tax liabilities and assets be classified as noncurrent in the consolidated statements of financial position. During the quarter ended December 31, 2015, the Company early adopted ASU No. 2015-17 and applied the change retrospectively to all periods presented. The impact of all adjustments made to the March 31, 2015 consolidated statements of financial position presented is summarized in the following table (in millions): March 31, 2015 Previously Reported Revised Effect of Change Consolidated Statement of Financial Position Other current assets $ 2,262 $ 1,790 $ (472 ) Other noncurrent assets 2,709 3,091 382 Other current liabilities 2,870 2,807 (63 ) Other noncurrent liabilities 1,861 1,834 (27 )

New Accounting Standards

New Accounting Standards	6 Months Ended
	Mar. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Standards	New Accounting Standards In March 2016, the FASB issued ASU No. 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting." ASU No. 2016-09 impacts certain aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities, and classification on the statements of cash flows. ASU No. 2016-09 will be effective for the Company for the quarter ending December 31, 2017, with early adoption permitted. The Company is currently assessing the impact adoption of this guidance will have on its consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-07, "Investments - Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting." ASU No. 2016-07 eliminates the requirement for an investment that qualifies for the use of the equity method of accounting as a result of an increase in the level of ownership or degree of influence to adjust the investment, results of operations and retained earnings retrospectively. ASU No. 2016-07 will be effective prospectively for the Company for increases in the level of ownership interest or degree of influence that result in the adoption of the equity method that occur during or after the quarter ending December 31, 2017, with early adoption permitted. The impact of this guidance for the Company is dependent on any future increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 842)." ASU No. 2016-02 requires recognition of operating leases as lease assets and liabilities on the balance sheet, and disclosure of key information about leasing arrangements. ASU No. 2016-02 will be effective retrospectively for the Company for the quarter ending December 31, 2019, with early adoption permitted. The Company is currently assessing the impact adoption of this guidance will have on its consolidated financial statements. In January 2016, the FASB issued ASU No. 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities." ASU No. 2016-01 amends certain aspects of recognition, measurement, presentation and disclosure of financial instruments. ASU No. 2016-01 will be effective prospectively for the Company for the quarter ending December 31, 2018, with early adoption permitted. The Company is currently assessing the impact adoption of this guidance will have on its consolidated financial statements. In July 2015, the FASB issued ASU No. 2015-11, "Simplifying the Measurement of Inventory." ASU No. 2015-11 requires inventory that is recorded using the first-in, first-out method to be measured at the lower of cost or net realizable value. ASU No. 2015-11 will be effective retrospectively for the Company for the quarter ending December 31, 2017, with early adoption permitted. The adoption of this guidance is not expected to have a significant impact on the Company's consolidated financial statements. In May 2015, the FASB issued ASU No. 2015-07, "Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent)." ASU No. 2015-07 removes the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share practical expedient. Such investments should be disclosed separate from the fair value hierarchy. ASU No. 2015-07 will be effective retrospectively for the Company for the quarter ending December 31, 2016, with early adoption permitted. The adoption of this guidance is not expected to have an impact on the Company's consolidated financial statements but will impact pension asset disclosures. In April 2015, the FASB issued ASU No. 2015-03, "Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs." ASU No. 2015-03 requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of the debt liability. ASU No. 2015-03 will be effective retrospectively for the Company for the quarter ending December 31, 2016, with early adoption permitted. The adoption of this guidance is not expected to have a significant impact on the Company's consolidated financial statements. In February 2015, the FASB issued ASU No. 2015-02, "Consolidation (Topic 810): Amendments to the Consolidation Analysis." ASU No. 2015-02 amends the analysis performed to determine whether a reporting entity should consolidate certain types of legal entities. ASU No. 2015-02 will be effective retrospectively for the Company for the quarter ending December 31, 2016, with early adoption permitted. The Company is currently assessing the impact adoption of this guidance will have on its consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers (Topic 606)." ASU No. 2014-09 clarifies the principles for recognizing revenue when an entity either enters into a contract with customers to transfer goods or services or enters into a contract for the transfer of non-financial assets. The original standard was effective retrospectively for the Company for the quarter ending December 31, 2017; however in August 2015, the FASB issued ASU No. 2015-14, "Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date," which defers the effective date of ASU No. 2014-09 by one-year for all entities. The new standard will become effective retrospectively for the Company for the quarter ending December 31, 2018, with early adoption permitted, but not before the original effective date. Additionally, in March 2016, the FASB issued ASU No. 2016-08, "Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net)," and in April 2016, the FASB issued ASU No. 2016-10, "Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing," which provide additional clarification on certain topics addressed in ASU No. 2014-09. ASU No. 2016-08 and ASU No. 2016-10 follow the same implementation guidelines as ASU No. 2014-09 and ASU No. 2015-14. The Company is currently assessing the impact adoption of this guidance will have on its consolidated financial statements. In April 2014, the FASB issued ASU No. 2014-08, "Presentation of Financial Statements (Topic 205) and Property, Plant and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity." ASU No. 2014-08 limits discontinued operations reporting to situations where the disposal represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results, and requires expanded disclosures for discontinued operations. ASU No. 2014-08 was effective for the Company for the quarter ended December 31, 2015. The adoption of this guidance did not have any impact on the Company's consolidated financial statements as there were no dispositions or disposals during the quarter ended December 31, 2015.

Acquisitions and Divestitures

Acquisitions and Divestitures	6 Months Ended
	Mar. 31, 2016
Business Combinations [Abstract]
Acquisition and Divestitures	Acquisitions and Divestitures On October 1, 2015, the Company formed a joint venture with Hitachi to expand its Building Efficiency product offerings. The Company acquired a 60 percent ownership interest in the new entity for approximately $133 million ( $563 million purchase price less cash acquired of $430 million ). The purchase price, net of cash acquired, was paid as of March 31, 2016. In connection with the acquisition, the Company recorded goodwill of $193 million related to purchase price allocations. The purchase price allocations may be subsequently adjusted to reflect final valuation studies. In the first six months of fiscal 2016, the Company completed one acquisition for a purchase price, net of cash acquired, of $3 million , none of which was paid as of March 31, 2016. The acquisition was not material to the Company's consolidated financial statements. In connection with the acquisition, the Company recorded goodwill of $4 million . The purchase price allocation may be subsequently adjusted to reflect the final valuation study. The acquisition increased the Company's ownership from a noncontrolling to controlling interest. As a result, the Company recorded a non-cash gain of $4 million in equity income for the Building Efficiency Rest of World segment to adjust the Company's existing equity investment in the partially-owned affiliate to fair value. In the first six months of fiscal 2015, the Company completed three acquisitions for a combined purchase price, net of cash acquired, of $47 million , $18 million of which was paid in the six months ended March 31, 2015 . The acquisitions in the aggregate were not material to the Company’s consolidated financial statements. In connection with the acquisitions, the Company recorded goodwill of $9 million . In the first six months of fiscal 2015, the Company adjusted the purchase price allocation of the fiscal 2014 acquisition of Air Distribution Technologies Inc. (ADT). The adjustment was made as a result of a true-up to the purchase price in the amount of $4 million , all of which was paid in the six months ended March 31, 2015 . Also, in connection with this acquisition, the Company recorded additional goodwill of $21 million in fiscal 2015 related to the purchase price allocations. In fiscal 2014, the Company recorded goodwill of $837 million in the Building Efficiency Products North America segment as a result of the ADT acquisition. In the three months ended March 31, 2015, the Company completed the sale of its interests in two GWS joint ventures to Brookfield Asset Management, Inc. The selling price, net of cash divested, was $141 million , all of which was received as of March 31, 2015. In connection with the sale, the Company recorded a $200 million gain, $127 million net of tax, within income from discontinued operations, net of tax on the consolidated statements of income and reduced goodwill in assets held for sale by $20 million . On January 25, 2016, the Company announced that it had entered into a definitive merger agreement (the "Merger Agreement") with Tyco International plc ("Tyco"), an indirect wholly owned subsidiary of Tyco ("Merger Sub") and the other party thereto under which the Company will combine with Tyco, a global fire and security provider. Under the terms of the agreement, which has been unanimously approved by the boards of directors of both parties, each outstanding share of the Company’s common stock, other than shares held by the Company, its subsidiaries, Tyco or Merger Sub, will be converted into the right to receive (subject to proration as described below), at the holder’s election, either: (i) one (1) (the "Exchange Ratio") ordinary share of the combined company (the "Share Consideration"); or (ii) an amount in cash equal to $34.88 (the "Cash Consideration"). Elections will be prorated so that Company shareholders will receive in the aggregate approximately $3.864 billion of cash in the merger. Holders that do not make an election will be treated as having elected to receive the Share Consideration. The Exchange Ratio takes into account the effects of a Tyco share consolidation contemplated by the Merger Agreement whereby, immediately prior to the merger, every issued and unissued ordinary share of Tyco will be consolidated into 0.955 of a share of Tyco. As a result of the merger, the Company's shareholders will own approximately 56 percent of the equity of the combined company, and Tyco shareholders will own approximately 44 percent of the equity of the combined company. The merger is expected to be consummated on or around the end of the Company’s 2016 fiscal year, subject to certain closing conditions, including, among others, (i) the approval and adoption of the Merger Agreement by holders of two thirds of the shares of the Company’s common stock entitled to vote on such matter, (ii) the approval by the Tyco shareholders at a special meeting of the Tyco shareholders (the "Tyco Special Meeting") of (A) the issuance of Tyco shares in connection with the merger, (B) the Tyco share consolidation and (C) the increase in Tyco’s authorized share capital, in each case, by a majority of the votes cast on these matters at the Tyco Special Meeting, and of certain amendments to Tyco’s articles of association, including a change of its name to "Johnson Controls plc," by at least 75% of the votes cast on these matters at the Tyco Special Meeting, (iii) the expiration or termination of any waiting period applicable to the merger under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, the consent of, or filing with, certain specified antitrust authorities, and certain other customary regulatory approvals, and (iv) Tyco’s obtaining the financing required to close the merger on the terms set forth in the Merger Agreement. Under the terms of the Merger Agreement, the combined company will be renamed "Johnson Controls plc," and the shares of the combined company will be listed on the New York Stock Exchange and trade under the symbol "JCI." The Merger Agreement also provides for the combined company to maintain Tyco’s Irish legal domicile and global headquarters in Cork, Ireland and for its primary operational headquarters in North America to be in Milwaukee, Wisconsin. At the effective time of the merger, the board of directors of the combined company will consist of eleven directors, six of whom will be directors of the Company’s board of directors prior to the closing and five of whom will be directors of the Tyco board of directors prior to the closing, comprised of the Company’s and Tyco’s current Chief Executive Officers and nine other directors to be mutually agreed between the Company and Tyco. One of the six directors from the Company’s board of directors prior to the closing shall be elected independent lead director. As of the effective time of the merger, Alex A. Molinaroli, the Company’s current Chairman, President, and Chief Executive Officer, will be appointed as Chairman and Chief Executive Officer of the combined company, and George R. Oliver, Tyco’s current Chief Executive Officer, will serve as President and Chief Operating Officer of the combined company. Mr. Oliver will succeed Mr. Molinaroli as Chief Executive Officer on the 18-month anniversary of the effective time (or such earlier time that Mr. Molinaroli ceases to be Chief Executive Officer). At that time, Mr. Molinaroli will become the Executive Chair, with the executive functions set forth in his employment agreement, and will serve in such role for 12 months . Following such 12-month period (or such earlier time that Mr. Molinaroli ceases to be Chairman) (the "Second Succession Date"), Mr. Oliver will become Chairman and Chief Executive Officer of the combined company. From the effective time until the date that is 3 months after the Second Succession Date, the appointment, removal or replacement of the Chief Executive Officer, Chairman, Executive Chairman, President or Chief Operating Officer of the combined company other than as described in this paragraph would require the affirmative vote of at least 75% of the non-executive directors of the combined company.

Discontinued Operations (Notes)

Discontinued Operations (Notes)	6 Months Ended
	Mar. 31, 2016
Discontinued Operations [Abstract]
Discontinued Operations	4. Discontinued Operations On March 31, 2015, the Company announced that it had reached a definitive agreement to sell the remainder of the GWS business to CBRE Group Inc., subject to regulatory and other approvals. The sale closed on September 1, 2015. The agreement includes a 10 -year strategic relationship between the Company and CBRE. The Company will be the preferred provider of HVAC equipment, building automation systems and related services to the portfolio of real estate and corporate facilities managed globally by CBRE and GWS. The Company also engages GWS for facility management services. The annual cash flows resulting from these activities with the legacy GWS business are not currently significant nor are they expected to become significant in the future. At March 31, 2015, the Company determined that its GWS segment met the criteria to be classified as a discontinued operation. The Company did not allocate any general corporate overhead to discontinued operations. The assets and liabilities of the GWS segment were reflected as held for sale in the consolidated statements of financial position at March 31, 2015 . The following table summarizes the results of GWS, reclassified as discontinued operations for the three and six month periods ended March 31, 2015 (in millions): Three Months Ended Six Months Ended 2015 2015 Net sales $ 803 $ 1,845 Income from discontinued operations before income taxes 227 269 Provision for income taxes on discontinued operations 149 162 Income from discontinued operations attributable to noncontrolling interests, net of tax 1 4 Income from discontinued operations $ 77 $ 103 For the three and six months ended March 31, 2015, the income from discontinued operations before income taxes included a $200 million gain on divestiture of the Company's interest in two GWS joint ventures. For the three and six months ended March 31, 2015, the income from discontinued operations before income taxes included transaction costs of $10 million and $17 million , respectively. For the three and six months ended March 31, 2015 , the effective tax rate was greater than the U.S. federal statutory rate of 35% primarily due to a second quarter discrete non-cash tax charge of $67 million related to the change in the Company's assertion over reinvestment of foreign undistributed earnings as well as the tax consequences of the sale of the GWS joint ventures, partially offset by foreign tax rate differentials. Assets and Liabilities Held for Sale At March 31, 2016, $17 million of certain corporate assets were classified as held for sale. In April 2015, the Company signed an agreement formally establishing the previously announced automotive interiors joint venture with Yanfeng Automotive Trim Systems. The formation of the joint venture closed on July 2, 2015. The assets and liabilities to be contributed to the joint venture met the criteria to be classified as held for sale beginning in the third quarter of fiscal 2014. At March 31, 2015, the Company determined certain product lines of the Automotive Experience Interiors segment that would not be contributed to the aforementioned automotive interiors joint venture also met the criteria to be classified as held for sale. At September 30, 2015, $55 million of assets and $42 million of liabilities related to certain product lines of the Automotive Experience Interiors segment which were not contributed to the automotive interiors joint venture were classified as held for sale. At March 31, 2016 , these product lines no longer met the criteria to be classified as held for sale. The Interiors businesses classified as held for sale did not meet the criteria to be classified as a discontinued operation primarily due to the Company's continuing involvement in these operations following the divestiture. The following table summarizes the carrying value of the Interiors and GWS assets and liabilities held for sale (in millions): March 31, 2015 Interiors Global Workplace Solutions Total Accounts receivable - net $ 583 $ 582 $ 1,165 Inventories 219 6 225 Other current assets 175 80 255 Property, plant and equipment - net 583 26 609 Goodwill 21 216 237 Other intangible assets - net 3 18 21 Investments in partially-owned affiliates 58 — 58 Other noncurrent assets 36 56 92 Assets held for sale $ 1,678 $ 984 $ 2,662 Short-term debt $ 18 $ 1 $ 19 Accounts payable 633 425 1,058 Accrued compensation and benefits 42 71 113 Other current liabilities 165 156 321 Liabilities held for sale $ 858 $ 653 $ 1,511

Percentage-of-Completion Contra

Percentage-of-Completion Contracts	6 Months Ended
	Mar. 31, 2016
Disclosure Percentage Of Completion Contracts Additional Information [Abstract]
Percentage-of-Completion Contracts	Percentage-of-Completion Contracts The Building Efficiency business records certain long-term contracts under the percentage-of-completion method of accounting. Under this method, sales and gross profit are recognized as work is performed based on the relationship between actual costs incurred and total estimated costs at completion. The Company records costs and earnings in excess of billings on uncompleted contracts primarily within accounts receivable - net and billings in excess of costs and earnings on uncompleted contracts primarily within other current liabilities in the consolidated statements of financial position. Costs and earnings in excess of billings related to these contracts were $411 million , $453 million and $462 million at March 31, 2016 , September 30, 2015 and March 31, 2015 , respectively. Billings in excess of costs and earnings related to these contracts were $335 million , $340 million and $397 million at March 31, 2016 , September 30, 2015 and March 31, 2015 , respectively.

Inventories

Inventories	6 Months Ended
	Mar. 31, 2016
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories consisted of the following (in millions): March 31, 2016 September 30, 2015 March 31, 2015 Raw materials and supplies $ 1,241 $ 1,084 $ 1,062 Work-in-process 439 369 391 Finished goods 1,242 924 961 Inventories $ 2,922 $ 2,377 $ 2,414

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets (Notes)	6 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS	Goodwill and Other Intangible Assets Effective October 1, 2015, the Company reorganized the reportable segments within its Building Efficiency business to align with its new management reporting structure and business activities. Historical information has been revised to reflect the new Building Efficiency reportable segments. Refer to Note 18, "Segment Information," of the notes to consolidated financial statements for further information. The changes in the carrying amount of goodwill in each of the Company’s reportable segments for the six month period ended September 30, 2015 and the six month period ended March 31, 2016 were as follows (in millions): Business Acquisitions Business Divestitures Currency Translation and Other March 31, September 30, 2015 2015 Building Efficiency Systems and Service North America $ 982 $ — $ (2 ) $ (2 ) $ 978 Products North America 1,697 13 (14 ) 5 1,701 Asia 402 — — (13 ) 389 Rest of World 296 — — 14 310 Automotive Experience Seating 2,327 — (4 ) 41 2,364 Power Solutions 1,084 — — (2 ) 1,082 Total $ 6,788 $ 13 $ (20 ) $ 43 $ 6,824 Business Acquisitions Business Divestitures Currency Translation and Other September 30, March 31, 2015 2016 Building Efficiency Systems and Service North America $ 978 $ — $ — $ — $ 978 Products North America 1,701 — — — 1,701 Asia 389 193 — (12 ) 570 Rest of World 310 4 — 2 316 Automotive Experience Seating 2,364 — — 26 2,390 Power Solutions 1,082 — — 5 1,087 Total $ 6,824 $ 197 $ — $ 21 $ 7,042 At March 31, 2015, accumulated goodwill impairment charges included $430 million and $47 million related to the Automotive Experience Interiors and Building Efficiency Rest of World - Latin America reporting units, respectively. At October 1, 2015, the Company assessed goodwill for impairment in the Building Efficiency business due to the change in reportable segments as described in Note 18, "Segment Information," of the notes to consolidated financial statements. As a result, the Company performed impairment testing for goodwill under the new segments and determined that the estimated fair value of each reporting unit substantially exceeded its corresponding carrying amount including recorded goodwill, and as such, no impairment existed at October 1, 2015. No reporting unit was determined to be at risk of failing step one of the goodwill impairment test. The Company’s other intangible assets, primarily from business acquisitions valued based on independent appraisals, consisted of (in millions): March 31, 2016 September 30, 2015 March 31, 2015 Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Amortized intangible assets Patented technology $ 47 $ (28 ) $ 19 $ 80 $ (59 ) $ 21 $ 82 $ (58 ) $ 24 Customer relationships 1,013 (238 ) 775 975 (206 ) 769 982 (180 ) 802 Miscellaneous 383 (144 ) 239 307 (123 ) 184 296 (107 ) 189 Total amortized intangible assets 1,443 (410 ) 1,033 1,362 (388 ) 974 1,360 (345 ) 1,015 Unamortized intangible assets Trademarks/trade names 543 — 543 542 — 542 543 — 543 Total intangible assets $ 1,986 $ (410 ) $ 1,576 $ 1,904 $ (388 ) $ 1,516 $ 1,903 $ (345 ) $ 1,558 Amortization of other intangible assets for the three month periods ended March 31, 2016 and 2015 was $24 million and $22 million , respectively. Amortization of other intangible assets for the six month periods ended March 31, 2016 and 2015 was $48 million and $46 million , respectively. Excluding the impact of any future acquisitions, the Company anticipates amortization for fiscal 2017 , 2018 , 2019 , 2020 and 2021 will be approximately $101 million , $99 million , $84 million , $75 million and $64 million per year, respectively.

Product Warranties

Product Warranties	6 Months Ended
	Mar. 31, 2016
Product Warranties Disclosures [Abstract]
Product Warranties	Product Warranties The Company offers warranties to its customers depending upon the specific product and terms of the customer purchase agreement. A typical warranty program requires that the Company replace defective products within a specified time period from the date of sale. The Company records an estimate for future warranty-related costs based on actual historical return rates and other known factors. Based on analysis of return rates and other factors, the Company’s warranty provisions are adjusted as necessary. The Company monitors its warranty activity and adjusts its reserve estimates when it is probable that future warranty costs will be different than those estimates. The Company’s product warranty liability is recorded in the consolidated statements of financial position in other current liabilities if the warranty is less than one year and in other noncurrent liabilities if the warranty extends longer than one year. The changes in the carrying amount of the Company’s total product warranty liability, including extended warranties for which deferred revenue is recorded, for the six months ended March 31, 2016 and 2015 were as follows (in millions): Six Months Ended 2016 2015 Balance at beginning of period $ 300 $ 319 Accruals for warranties issued during the period 157 136 Accruals from acquisition and divestitures 37 — Accruals related to pre-existing warranties (including changes in estimates) 8 (2 ) Settlements made (in cash or in kind) during the period (152 ) (144 ) Currency translation 2 (7 ) Balance at end of period $ 352 $ 302

Significant Restructuring Costs

Significant Restructuring Costs	6 Months Ended
	Mar. 31, 2016
Restructuring Charges [Abstract]
Significant Restructuring Costs	Significant Restructuring and Impairment Costs To better align its resources with its growth strategies and reduce the cost structure of its global operations to address the softness in certain underlying markets, the Company commits to restructuring plans as necessary. In fiscal 2016, the Company committed to a significant restructuring plan (2016 Plan) and recorded $229 million of restructuring and impairment costs in the consolidated statements of income. This is the total amount incurred to date for this restructuring plan. The restructuring actions related to cost reduction initiatives in the Company’s Automotive Experience and Building Efficiency businesses and at Corporate. The costs consist primarily of workforce reductions, plant closures and asset impairments. Of the restructuring and impairment costs recorded, $169 million related to the Automotive Experience Seating segment, $26 million related to the Building Efficiency Asia segment, $16 million related to the Building Efficiency Rest of World segment, $9 million related to the Building Efficiency Products North America segment, $7 million related to Corporate and $2 million related to the Building Efficiency Systems and Service North America segment. The restructuring actions are expected to be substantially complete in fiscal 2017. The following table summarizes the changes in the Company’s 2016 Plan reserve, included within other current liabilities in the consolidated statements of financial position (in millions): Employee Severance and Termination Benefits Long-Lived Asset Impairments Other Currency Total Original Reserve $ 194 $ 29 $ 6 $ — $ 229 Utilized—cash (3 ) — (1 ) — (4 ) Utilized—noncash — (29 ) — 2 (27 ) Balance at March 31, 2016 $ 191 $ — $ 5 $ 2 $ 198 In fiscal 2015, the Company committed to a significant restructuring plan (2015 Plan) and recorded $397 million of restructuring and impairment costs in the consolidated statements of income. This is the total amount incurred to date and the total amount expected to be incurred for this restructuring plan. The restructuring actions related to cost reduction initiatives in the Company’s Automotive Experience, Building Efficiency and Power Solutions businesses and at Corporate. The costs consist primarily of workforce reductions, plant closures and asset impairments. Of the restructuring and impairment costs recorded, $182 million related to the Automotive Experience Seating segment, $166 million related to Corporate, $13 million related to the Building Efficiency Rest of World segment, $11 million related to the Power Solutions segment, $11 million related to the Building Efficiency Asia segment, $11 million related to the Building Efficiency Products North America segment and $3 million related to the Building Efficiency Systems and Service North America segment. The restructuring actions are expected to be substantially complete in fiscal 2016. The following table summarizes the changes in the Company’s 2015 Plan reserve, included within other current liabilities in the consolidated statements of financial position (in millions): Employee Severance and Termination Benefits Long-Lived Asset Impairments Other Currency Total Original Reserve $ 191 $ 183 $ 23 $ — $ 397 Utilized—cash — — — — — Utilized—noncash — (183 ) — — (183 ) Balance at September 30, 2015 $ 191 $ — $ 23 $ — $ 214 Utilized—cash (37 ) — (23 ) — (60 ) Utilized—noncash — — — 2 2 Balance at March 31, 2016 $ 154 $ — $ — $ 2 $ 156 In fiscal 2014, the Company committed to a significant restructuring plan (2014 Plan) and recorded $324 million of restructuring and impairment costs in the consolidated statements of income. This is the total amount incurred to date and the total amount expected to be incurred for this restructuring plan. The restructuring actions related primarily to cost reduction initiatives in the Company’s Automotive Experience, Building Efficiency and Power Solutions businesses and included workforce reductions, plant closures, and asset and goodwill impairments. Of the restructuring and impairment costs recorded, $130 million related to the Automotive Experience Interiors segment, $119 million related to the Building Efficiency Rest of World segment, $29 million related to the Automotive Experience Seating segment, $16 million related to the Power Solutions segment, $12 million related to the Building Efficiency Systems and Service North America segment, $7 million related to the Building Efficiency Products North America segment, $7 million related to Corporate and $4 million related to the Building Efficiency Asia segment. The restructuring actions are expected to be substantially complete in fiscal 2016. Additionally, the Company recorded $53 million of restructuring and impairment costs within discontinued operations related to the Automotive Experience Electronics business in fiscal 2014. The following table summarizes the changes in the Company’s 2014 Plan reserve, included within other current liabilities in the consolidated statements of financial position (in millions): Employee Severance and Termination Benefits Long-Lived Asset Impairments Goodwill Impairment Other Currency Total Original Reserve $ 191 $ 134 $ 47 $ 5 $ — $ 377 Utilized—cash (8 ) — — — — (8 ) Utilized—noncash — (134 ) (47 ) — (6 ) (187 ) Balance at September 30, 2014 $ 183 $ — $ — $ 5 $ (6 ) $ 182 Utilized—cash (65 ) — — (5 ) — (70 ) Utilized—noncash — — — — (13 ) (13 ) Balance at September 30, 2015 $ 118 $ — $ — $ — $ (19 ) $ 99 Utilized—cash (31 ) — — — — (31 ) Utilized—noncash — — — — (2 ) (2 ) Balance at March 31, 2016 $ 87 $ — $ — $ — $ (21 ) $ 66 In fiscal 2013, the Company committed to a significant restructuring plan (2013 Plan) and recorded $903 million of restructuring and impairment costs in the consolidated statements of income. This is the total amount incurred to date and the total amount expected to be incurred for this restructuring plan. The restructuring actions related to cost reduction initiatives in the Company’s Automotive Experience, Building Efficiency and Power Solutions businesses and included workforce reductions, plant closures, and asset and goodwill impairments. Of the restructuring and impairment costs recorded, $560 million related to the Automotive Experience Interiors segment, $152 million related to the Automotive Experience Seating segment, $70 million related to the Building Efficiency Rest of World segment, $36 million related to the Power Solutions segment, $35 million related to the Building Efficiency Systems and Service North America segment, $28 million related to the Building Efficiency Products North America segment, $17 million related to Corporate and $5 million related to the Building Efficiency Asia segment. The restructuring actions are expected to be substantially complete in fiscal 2016. Additionally, the Company recorded $82 million of restructuring costs within discontinued operations, of which $54 million related to the GWS business and $28 million related to the Automotive Experience Electronics business in fiscal 2013. The following table summarizes the changes in the Company’s 2013 Plan reserve, included within other current liabilities in the consolidated statements of financial position (in millions): Employee Severance and Termination Benefits Long-Lived Asset Impairments Goodwill Impairment Other Currency Total Original Reserve $ 392 $ 156 $ 430 $ 7 $ — $ 985 Utilized—cash (26 ) — — — — (26 ) Utilized—noncash — (156 ) (430 ) (4 ) 4 (586 ) Transfer to liabilities held for sale (31 ) — — — — (31 ) Balance at September 30, 2013 $ 335 $ — $ — $ 3 $ 4 $ 342 Utilized—cash (144 ) — — (3 ) — (147 ) Utilized—noncash — — — — (11 ) (11 ) Transfer from liabilities held for sale 31 — — — — 31 Transfer to liabilities held for sale (24 ) — — — — (24 ) Balance at September 30, 2014 $ 198 $ — $ — $ — $ (7 ) $ 191 Utilized—cash (113 ) — — — — (113 ) Utilized—noncash — — — — (10 ) (10 ) Balance at September 30, 2015 $ 85 $ — $ — $ — $ (17 ) $ 68 Utilized—cash (33 ) — — — — (33 ) Utilized—noncash — — — — (1 ) (1 ) Balance at March 31, 2016 $ 52 $ — $ — $ — $ (18 ) $ 34 The $31 million of transfers from liabilities held for sale represent restructuring reserves that were included in liabilities held for sale in the consolidated statements of financial position at September 30, 2013, but were excluded from liabilities held for sale at September 30, 2014 based on transaction negotiations. See Note 4, "Discontinued Operations," of the notes to consolidated financial statements for further information regarding the Company's assets and liabilities held for sale. The Company's fiscal 2016, 2015, 2014 and 2013 restructuring plans included workforce reductions of approximately 17,100 employees ( 10,000 for the Automotive Experience business, 6,100 for the Building Efficiency business, 900 for the Power Solutions business and 100 for Corporate). Restructuring charges associated with employee severance and termination benefits are paid over the severance period granted to each employee or on a lump sum basis in accordance with individual severance agreements. As of March 31, 2016 , approximately 10,400 of the employees have been separated from the Company pursuant to the restructuring plans. In addition, the restructuring plans included twenty-six plant closures ( eighteen for Automotive Experience and eight for Building Efficiency). As of March 31, 2016 , ten of the twenty-six plants have been closed. Company management closely monitors its overall cost structure and continually analyzes each of its businesses for opportunities to consolidate current operations, improve operating efficiencies and locate facilities in low cost countries in close proximity to customers. This ongoing analysis includes a review of its manufacturing, engineering and purchasing operations, as well as the overall global footprint for all its businesses. Because of the importance of new vehicle sales by major automotive manufacturers to operations, the Company is affected by the general business conditions in this industry. Future adverse developments in the automotive industry could impact the Company’s liquidity position, lead to impairment charges and/or require additional restructuring of its operations.

Income Taxes

Income Taxes	6 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes In calculating the provision for income taxes, the Company uses an estimate of the annual effective tax rate based upon the facts and circumstances known at each interim period. On a quarterly basis, the actual effective tax rate is adjusted, as appropriate, based upon changed facts and circumstances, if any, as compared to those forecasted at the beginning of the fiscal year and each interim period thereafter. For the three and six months ended March 31, 2016 , the Company's effective tax rate for continuing operations was 218% and 98% , respectively. The effective rate was higher than the U.S. federal statutory rate of 35% primarily due to the Company’s change in assertion over permanently reinvested earnings as a result of the proposed spin-off of the Automotive Experience business ( $780 million ), the jurisdictional mix of significant restructuring and impairment costs, and the tax impacts of separation costs, partially offset by the benefits of continuing global tax planning initiatives and foreign tax rate differentials. For the three and six months ended March 31, 2015 , the Company's effective tax rate for continuing operations was 22% and 20% , respectively. The effective rate was lower than the U.S. federal statutory rate of 35% primarily due to global tax planning and foreign tax rate differentials, partially offset by a tax law change in Japan. Valuation Allowance The Company reviews the realizability of its deferred tax assets on a quarterly basis, or whenever events or changes in circumstances indicate that a review is required. In determining the requirement for a valuation allowance, the historical and projected financial results of the legal entity or consolidated group recording the net deferred tax asset are considered, along with any other positive or negative evidence. Since future financial results may differ from previous estimates, periodic adjustments to the Company’s valuation allowances may be necessary. Uncertain Tax Positions At September 30, 2015 , the Company had gross tax effected unrecognized tax benefits of $1,235 million , of which $1,180 million , if recognized, would impact the effective tax rate. Total net accrued interest at September 30, 2015 was approximately $41 million (net of tax benefit). The interest and penalties accrued during the six months ended March 31, 2016 and 2015 was not material. The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income tax expense. In the first quarter of fiscal 2015, the Company settled tax audits in multiple jurisdictions. The benefit of those settlements was substantially offset by a net tax provision recorded in the quarter where it was more likely than not that the losses would not be realized. In the U.S., fiscal years 2013 through 2014 are currently under exam by the Internal Revenue Service. Additionally, the Company is currently under exam in the following major foreign jurisdictions: Tax Jurisdiction Tax Years Covered Belgium 2010 - 2012 Brazil 2004 - 2008, 2011 - 2012 Canada 2008 - 2013 France 2002 - 2013 Germany 2007 - 2012 Italy 2006, 2011 Korea 2008 - 2014 Mexico 2011 Spain 2013 United Kingdom 2011 - 2013 It is reasonably possible that certain tax examinations and/or tax litigation will conclude within the next twelve months, the impact of which could be up to a $50 million benefit to tax expense. Impacts of Tax Legislation The "look-through rule," under subpart F of the U.S. Internal Revenue Code, expired for the Company on September 30, 2015. The "look-through rule" had provided an exception to the U.S. taxation of certain income generated by foreign subsidiaries. The rule was extended in December 2015 retroactive to the beginning of the Company’s 2016 fiscal year. The retroactive extension was signed into legislation and was made permanent through the Company's 2020 fiscal year. During the six months ended March 31, 2015, tax legislation was adopted in Japan which reduced its statutory income tax rate. As a result of the law change, the Company recorded income tax expense of $17 million . During the six months ended March 31, 2016 and March 31, 2015 , other tax legislation was adopted in various jurisdictions. These law changes did not have a material impact on the Company's consolidated financial statements. Other Tax Matters In the second quarter of fiscal 2016, the Company provided income tax expense on the foreign undistributed earnings of certain non-U.S. subsidiaries associated with the proposed spin-off of the Automotive Experience business, which resulted in a non-cash tax charge of $780 million . In the second quarter of fiscal 2016, the Company recorded $229 million of significant restructuring and impairment costs. Refer to Note 9, "Significant Restructuring and Impairment Costs," of the notes to consolidated financial statements for additional information. The restructuring costs generated a $17 million tax benefit, which was negatively impacted by the geographic mix, the Company’s current tax position in these jurisdictions and the underlying tax basis in the impaired assets.

Pension and Postretirement Plan

Pension and Postretirement Plans	6 Months Ended
	Mar. 31, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Pension and Postretirement Plans	Pension and Postretirement Plans The components of the Company’s net periodic benefit costs from continuing operations associated with its defined benefit pension and postretirement plans are shown in the tables below in accordance with ASC 715, "Compensation – Retirement Benefits" (in millions): U.S. Pension Plans Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Service cost $ 4 $ 7 $ 8 $ 15 Interest cost 25 31 50 61 Expected return on plan assets (46 ) (45 ) (93 ) (90 ) Net periodic benefit credit $ (17 ) $ (7 ) $ (35 ) $ (14 ) Non-U.S. Pension Plans Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Service cost $ 4 $ 6 $ 9 $ 13 Interest cost 10 12 20 24 Expected return on plan assets (13 ) (13 ) (26 ) (26 ) Net periodic benefit cost $ 1 $ 5 $ 3 $ 11 Postretirement Benefits Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Service cost $ — $ — $ 1 $ 1 Interest cost 2 3 3 5 Expected return on plan assets (2 ) (3 ) (5 ) (6 ) Amortization of prior service credit (1 ) (1 ) (1 ) (1 ) Net periodic benefit credit $ (1 ) $ (1 ) $ (2 ) $ (1 )

Debt and Financing Arrangements

Debt and Financing Arrangements	6 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Debt and Financing Arrangements	Debt and Financing Arrangements In March 2016, the Company entered into a new credit agreement intended to replace its existing credit agreement upon the consummation of the expected merger between the Company and Tyco. The new credit agreement provides for a $2.0 billion revolving credit facility that matures in August 2020, which will become available only upon the consummation of the merger and the satisfaction of certain other closing conditions. In February 2016, the Company entered into a nine -month, $100 million floating rate term loan scheduled to mature in November 2016. Proceeds from the term loan were used for general corporate purposes. In February 2016, the Company terminated a 37 million euro committed revolving credit facility scheduled to mature in September 2016, and subsequently entered into a nine -month, 100 million euro, floating rate term loan scheduled to mature in October 2016. Proceeds from the term loan were used for general corporate purposes. In January 2016, the Company entered into a ten -month, $200 million , floating rate term loan scheduled to mature in October 2016. Proceeds from the term loan were used for general corporate purposes. In January 2016, the Company entered into a ten -month, $125 million , floating rate term loan scheduled to mature in October 2016. Proceeds from the term loan were used for general corporate purposes. In January 2016, the Company entered into a one -year, $90 million , committed revolving credit facility scheduled to mature in January 2017. The Company drew on the full credit facility during the quarter ended March 31, 2016 . Proceeds from the revolving credit facility were used for general corporate purposes. In January 2016, the Company retired $800 million in principal amount, plus accrued interest, of its 5.5% fixed rate notes that matured in January 2016. In November 2015 and December 2015, a $35 million and a $100 million committed revolving credit facility, respectively, expired. The Company entered into a new $35 million committed revolving credit facility scheduled to expire in November 2016 and a new $100 million committed revolving credit facility scheduled to expire in December 2016. As of March 31, 2016, there were no draws on either facility. In December 2015, the Company entered into a nine -month, $125 million , floating rate term loan scheduled to mature in September 2016. Proceeds from the term loan were used for general corporate purposes. In December 2015, the Company entered into a nine -month, $200 million , floating rate term loan scheduled to mature in September 2016. Proceeds from the term loan were used for general corporate purposes. In March 2015, the Company retired $125 million in principal amount, plus accrued interest, of its 7.7% fixed rate notes that matured in March 2015. In February 2015, the Company entered into a seven -month, $150 million , floating rate term loan scheduled to mature in September 2015. Proceeds from the term loan were used for general corporate purposes. The loan was repaid in September 2015. In January 2015, the Company entered into a one -year, $90 million , committed revolving credit facility scheduled to mature in January 2016. The Company drew on the full credit facility during the quarter ended March 31, 2015. Proceeds from the revolving credit facility were used for general corporate purposes. The $90 million was repaid in September 2015. In December 2014, the Company entered into a nine -month, $500 million , floating rate term loan scheduled to mature in September 2015. Proceeds from the term loan were used for general corporate purposes. The loan was repaid in September 2015. In December 2014, the Company entered into a nine -month, $100 million , floating rate term loan scheduled to mature in September 2015. Proceeds from the term loan were used for general corporate purposes. The loan was repaid in September 2015. Net Financing Charges The Company's net financing charges line item in the consolidated statements of income for the three and six month periods ended March 31, 2016 and 2015 contained the following components (in millions): Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Interest expense, net of capitalized interest costs $ 69 $ 72 $ 142 $ 143 Banking fees and bond cost amortization 5 6 13 12 Interest income (3 ) (1 ) (5 ) (4 ) Net foreign exchange results for financing activities 3 (8 ) (8 ) (11 ) Net financing charges $ 74 $ 69 $ 142 $ 140

Earnings Per Share

Earnings Per Share	6 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The Company presents both basic and diluted earnings per share (EPS) amounts. Basic EPS is calculated by dividing net income attributable to Johnson Controls, Inc. by the weighted average number of common shares outstanding during the reporting period. Diluted EPS is calculated by dividing net income attributable to Johnson Controls, Inc. by the weighted average number of common shares and common equivalent shares outstanding during the reporting period that are calculated using the treasury stock method for stock options, unvested restricted stock and unvested performance share awards. The treasury stock method assumes that the Company uses the proceeds from the exercise of stock option awards to repurchase common stock at the average market price during the period. The assumed proceeds under the treasury stock method include the purchase price that the grantee will pay in the future, compensation cost for future service that the Company has not yet recognized and any windfall tax benefits that would be credited to capital in excess of par value when the award generates a tax deduction. If there would be a shortfall resulting in a charge to capital in excess of par value, such an amount would be a reduction of the proceeds. For unvested restricted stock and unvested performance share awards, assumed proceeds under the treasury stock method would include unamortized compensation cost and windfall tax benefits or shortfalls. The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share (in millions): Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Income (Loss) Available to Common Shareholders Income (loss) from continuing operations $ (530 ) $ 452 $ (80 ) $ 933 Income from discontinued operations — 77 — 103 Basic and diluted income (loss) available to common shareholders $ (530 ) $ 529 $ (80 ) $ 1,036 Weighted Average Shares Outstanding Basic weighted average shares outstanding 648.2 654.4 648.0 657.9 Effect of dilutive securities: Stock options, unvested restricted stock and unvested performance share awards — 6.8 — 6.8 Diluted weighted average shares outstanding 648.2 661.2 648.0 664.7 Antidilutive Securities Options to purchase common shares — 0.5 — 0.4 For the three and six months ended March 31, 2016, the total number of potential dilutive shares due to stock options, unvested restricted stock and unvested performance share awards was 3.9 million and 4.5 million , respectively. However, these items were not included in the computation of diluted loss per share for the three and six months ended March 31, 2016, since to do so would decrease the loss per share. During the three months ended March 31, 2016 and 2015 , the Company declared a dividend of $0.29 and $0.26 , respectively, per common share. During the six months ended March 31, 2016 and 2015 , the Company declared two quarterly dividends totaling $0.58 and $0.52 , respectively, per common share. The Company paid all dividends in the month subsequent to the end of each fiscal quarter.

Equity and Noncontrolling Inter

Equity and Noncontrolling Interests	6 Months Ended
	Mar. 31, 2016
Stockholders' Equity Note [Abstract]
Equity and Noncontrolling Interests	Equity and Noncontrolling Interests Other comprehensive income includes activity relating to discontinued operations. The following schedules present changes in consolidated equity attributable to Johnson Controls, Inc. and noncontrolling interests (in millions, net of tax): Three Months Ended March 31, 2016 Three Months Ended March 31, 2015 Equity Attributable to Johnson Controls, Inc. Equity Attributable to Noncontrolling Interests Total Equity Equity Attributable to Johnson Controls, Inc. Equity Attributable to Noncontrolling Interests Total Equity Beginning balance, December 31 $ 10,506 $ 931 $ 11,437 $ 10,823 $ 263 $ 11,086 Total comprehensive income (loss): Net income (loss) (530 ) 50 (480 ) 529 16 545 Foreign currency translation adjustments 175 18 193 (481 ) (3 ) (484 ) Realized and unrealized gains on derivatives 4 1 5 6 — 6 Other comprehensive income (loss) 179 19 198 (475 ) (3 ) (478 ) Comprehensive income (loss) (351 ) 69 (282 ) 54 13 67 Other changes in equity: Cash dividends—common stock (189 ) — (189 ) (170 ) — (170 ) Dividends attributable to noncontrolling interests — (29 ) (29 ) — (8 ) (8 ) Repurchases of common stock — — — (210 ) — (210 ) Change in noncontrolling interest share — (73 ) (73 ) — (69 ) (69 ) Other, including options exercised 18 — 18 86 — 86 Ending balance, March 31 $ 9,984 $ 898 $ 10,882 $ 10,583 $ 199 $ 10,782 Six Months Ended March 31, 2016 Six Months Ended March 31, 2015 Equity Attributable to Johnson Controls, Inc. Equity Attributable to Noncontrolling Interests Total Equity Equity Attributable to Johnson Controls, Inc. Equity Attributable to Noncontrolling Interests Total Equity Beginning balance, September 30 $ 10,376 $ 163 $ 10,539 $ 11,311 $ 251 $ 11,562 Total comprehensive income (loss): Net income (loss) (80 ) 70 (10 ) 1,036 36 1,072 Foreign currency translation adjustments 15 9 24 (832 ) (3 ) (835 ) Realized and unrealized gains (losses) on derivatives 3 1 4 (4 ) — (4 ) Pension and postretirement plans — — — (3 ) — (3 ) Other comprehensive income (loss) 18 10 28 (839 ) (3 ) (842 ) Comprehensive income (loss) (62 ) 80 18 197 33 230 Other changes in equity: Cash dividends—common stock (377 ) — (377 ) (342 ) — (342 ) Dividends attributable to noncontrolling interests — (36 ) (36 ) — (16 ) (16 ) Repurchases of common stock — — — (810 ) — (810 ) Change in noncontrolling interest share — 691 691 — (69 ) (69 ) Other, including options exercised 47 — 47 227 — 227 Ending balance, March 31 $ 9,984 $ 898 $ 10,882 $ 10,583 $ 199 $ 10,782 As previously disclosed, on October 1, 2015, the Company formed a joint venture with Hitachi. In connection with the acquisition, the Company recorded equity attributable to noncontrolling interests of $691 million. In November 2013, the Company's Board of Directors authorized a $3 billion increase in the Company's share repurchase program, which brought the total authorized amount under the repurchase program to $3.65 billion . The share repurchase program does not have an expiration date and may be amended or terminated by the Board of Directors at any time without prior notice. For the three and six month periods ended March 31, 2015 , the Company repurchased approximately $210 million and $810 million of its common shares, respectively. The Company consolidates certain subsidiaries in which the noncontrolling interest party has within its control the right to require the Company to redeem all or a portion of its interest in the subsidiary. The redeemable noncontrolling interests are reported at their estimated redemption value. Any adjustment to the redemption value impacts retained earnings but does not impact net income. Redeemable noncontrolling interests which are redeemable only upon future events, the occurrence of which is not currently probable, are recorded at carrying value. The following schedules present changes in the redeemable noncontrolling interests (in millions): Three Months Ended 2016 2015 Beginning balance, December 31 $ 216 $ 209 Net income 11 12 Foreign currency translation adjustments 10 (20 ) Realized and unrealized gains on derivatives — 1 Ending balance, March 31 $ 237 $ 202 Six Months Ended 2016 2015 Beginning balance, September 30 $ 212 $ 194 Net income 31 31 Foreign currency translation adjustments 2 (20 ) Realized and unrealized gains (losses) on derivatives (2 ) 1 Dividends (6 ) (4 ) Ending balance, March 31 $ 237 $ 202 The following schedules present changes in accumulated other comprehensive income (AOCI) attributable to Johnson Controls, Inc. (in millions, net of tax): Three Months Ended March 31, 2016 2015 Foreign currency translation adjustments Balance at beginning of period $ (1,207 ) $ (599 ) Aggregate adjustment for the period (net of tax effect of $5 and $(4)) 175 (481 ) Balance at end of period (1,032 ) (1,080 ) Realized and unrealized gains (losses) on derivatives Balance at beginning of period (8 ) (6 ) Current period changes in fair value (net of tax effect of $1 and $1) 5 4 Reclassification to income (net of tax effect of $0 and $1) * (1 ) 2 Balance at end of period (4 ) — Pension and postretirement plans Balance at beginning of period (3 ) 4 Reclassification to income (net of tax effect of $0) ** (1 ) (1 ) Other changes (net of tax effect of $0) 1 1 Balance at end of period (3 ) 4 Accumulated other comprehensive loss, end of period $ (1,039 ) $ (1,076 ) Six Months Ended March 31, 2016 2015 Foreign currency translation adjustments Balance at beginning of period $ (1,047 ) $ (248 ) Aggregate adjustment for the period (net of tax effect of $1 and $(2)) 15 (832 ) Balance at end of period (1,032 ) (1,080 ) Realized and unrealized gains (losses) on derivatives Balance at beginning of period (7 ) 4 Current period changes in fair value (net of tax effect of $1 and $(4)) 1 (5 ) Reclassification to income (net of tax effect of $1 and $1) * 2 1 Balance at end of period (4 ) — Pension and postretirement plans Balance at beginning of period (3 ) 7 Reclassification to income (net of tax effect of $0 and $(1)) ** (1 ) (4 ) Other changes (net of tax effect of $0) 1 1 Balance at end of period (3 ) 4 Accumulated other comprehensive loss, end of period $ (1,039 ) $ (1,076 ) * Refer to Note 15, "Derivative Instruments and Hedging Activities," of the notes to consolidated financial statements for disclosure of the line items on the consolidated statements of income affected by reclassifications from AOCI into income related to derivatives. ** Refer to Note 11, "Pension and Postretirement Plans," of the notes to consolidated financial statements for disclosure of the components of the Company's net periodic benefit costs associated with its defined benefit pension and postretirement plans. For the three and six months ended March 31, 2016, the amounts reclassified from AOCI into income for pension and postretirement plans were primarily recorded in selling, general and administrative expenses on the consolidated statements of income. For the three and six months ended March 31, 2015 , the amounts reclassified from AOCI into income for pension and postretirement plans were primarily recorded in selling, general and administrative expenses and income from discontinued operations, net of tax on the consolidated statements of income.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	6 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities The Company selectively uses derivative instruments to reduce market risk associated with changes in foreign currency, commodities, stock-based compensation liabilities and interest rates. Under Company policy, the use of derivatives is restricted to those intended for hedging purposes; the use of any derivative instrument for speculative purposes is strictly prohibited. A description of each type of derivative utilized by the Company to manage risk is included in the following paragraphs. In addition, refer to Note 16, "Fair Value Measurements," of the notes to consolidated financial statements for information related to the fair value measurements and valuation methods utilized by the Company for each derivative type. The Company has global operations and participates in the foreign exchange markets to minimize its risk of loss from fluctuations in foreign currency exchange rates. The Company primarily uses foreign currency exchange contracts to hedge certain of its foreign exchange rate exposures. The Company hedges 70% to 90% of the nominal amount of each of its known foreign exchange transactional exposures. The Company has entered into cross-currency interest rate swaps and foreign currency denominated debt obligations to selectively hedge portions of its net investment in Japan. The currency effects of the cross-currency interest rate swaps and debt obligations are reflected in the AOCI account within shareholders’ equity attributable to Johnson Controls, Inc. where they offset gains and losses recorded on the Company’s net investment in Japan. At March 31, 2016 , the Company had two cross-currency interest rate swaps outstanding totaling 10 billion yen and 37 billion yen of foreign denominated debt outstanding designated as net investment hedges in the Company’s net investment in Japan. At September 30, 2015 and March 31, 2015 , the Company had four cross-currency interest rate swaps outstanding totaling 20 billion yen. The Company did not have any foreign denominated debt outstanding designated as a net investment hedge at September 30, 2015 or March 31, 2015 . The Company uses commodity hedge contracts in the financial derivatives market in cases where commodity price risk cannot be naturally offset or hedged through supply base fixed price contracts. Commodity risks are systematically managed pursuant to policy guidelines. As cash flow hedges, the effective portion of the hedge gains or losses due to changes in fair value are initially recorded as a component of AOCI and are subsequently reclassified into earnings when the hedged transactions, typically sales, occur and affect earnings. Any ineffective portion of the hedge is reflected in the consolidated statements of income. The maturities of the commodity hedge contracts coincide with the expected purchase of the commodities. The Company had the following outstanding contracts to hedge forecasted commodity purchases: Volume Outstanding as of Commodity Units March 31, 2016 September 30, 2015 March 31, 2015 Copper Pounds 7,155,000 14,648,000 7,805,000 Lead Metric Tons 4,595 6,785 10,952 Aluminum Metric Tons 2,785 5,700 1,830 Tin Metric Tons 688 2,080 1,000 The Company selectively uses equity swaps to reduce market risk associated with certain of its stock-based compensation plans, such as its deferred compensation plans. These equity compensation liabilities increase as the Company’s stock price increases and decrease as the Company’s stock price decreases. In contrast, the value of the swap agreement moves in the opposite direction of these liabilities, allowing the Company to fix a portion of the liabilities at a stated amount. As of March 31, 2016 , September 30, 2015 and March 31, 2015 , the Company had hedged approximately 3.8 million , 4.0 million and 4.1 million shares of its common stock, respectively. The Company selectively uses interest rate swaps to reduce market risk associated with changes in interest rates for its fixed-rate bonds. As fair value hedges, the interest rate swaps and related debt balances are valued under a market approach using publicized swap curves. Changes in the fair value of the swap and hedged portion of the debt are recorded in the consolidated statements of income. In the fourth quarter of fiscal 2013, the Company entered into four fixed to floating interest rate swaps totaling $800 million to hedge the coupon of its 5.5% notes that matured in January 2016. In the third quarter of fiscal 2014, the Company entered into four fixed to floating interest rate swaps totaling $400 million to hedge the coupon of its 2.6% notes maturing December 2016, three fixed to floating interest rate swaps totaling $300 million to hedge the coupon of its 1.4% notes maturing November 2017 and one fixed to floating interest rate swap totaling $150 million to hedge the coupon of its 7.125% notes maturing July 2017. There were eight interest rate swaps outstanding as of March 31, 2016 . There were twelve interest rate swaps outstanding as of September 30, 2015 and March 31, 2015 . In September 2005, the Company entered into three forward treasury lock agreements to reduce the market risk associated with changes in interest rates associated with the Company’s anticipated fixed-rate note issuance to finance the acquisition of York International (cash flow hedge). The three forward treasury lock agreements, which had a combined notional amount of $1.3 billion , fixed a portion of the future interest cost for 5-year, 10-year and 30-year notes. The fair value of each treasury lock agreement, or the difference between the treasury lock reference rate and the fixed rate at time of note issuance, is amortized to interest expense over the life of the respective note issuance. In January 2006, in connection with the Company’s debt refinancing, the three forward treasury lock agreements were terminated. The following table presents the location and fair values of derivative instruments and hedging activities included in the Company’s consolidated statements of financial position (in millions): Derivatives and Hedging Activities Designated as Hedging Instruments under ASC 815 Derivatives and Hedging Activities Not Designated as Hedging Instruments under ASC 815 March 31, September 30, March 31, March 31, September 30, March 31, 2016 2015 2015 2016 2015 2015 Other current assets Foreign currency exchange derivatives $ 21 $ 31 $ 50 $ — $ 27 $ 28 Commodity derivatives 1 — — — — — Interest rate swaps — 1 2 — — — Cross-currency interest rate swaps — 5 20 — — — Other noncurrent assets Interest rate swaps 3 5 2 — — — Equity swap — — — 147 164 205 Total assets $ 25 $ 42 $ 74 $ 147 $ 191 $ 233 Other current liabilities Foreign currency exchange derivatives $ 30 $ 37 $ 50 $ 30 $ 26 $ 22 Commodity derivatives 3 7 7 — — — Cross-currency interest rate swaps 7 1 — — — — Current portion of long-term debt Fixed rate debt swapped to floating 403 801 801 — — — Long-term debt Foreign currency denominated debt 329 — — — — — Fixed rate debt swapped to floating 450 855 853 — — — Total liabilities $ 1,222 $ 1,701 $ 1,711 $ 30 $ 26 $ 22 The Company enters into International Swaps and Derivatives Associations (ISDA) master netting agreements with counterparties that permit the net settlement of amounts owed under the derivative contracts. The master netting agreements generally provide for net settlement of all outstanding contracts with a counterparty in the case of an event of default or a termination event. The Company has not elected to offset the fair value positions of the derivative contracts recorded in the consolidated statements of financial position. Collateral is generally not required of the Company or the counterparties under the master netting agreements. As of March 31, 2016 , September 30, 2015 and March 31, 2015 , no cash collateral was received or pledged under the master netting agreements. The gross and net amounts of derivative assets and liabilities were as follows (in millions): Fair Value of Assets Fair Value of Liabilities March 31, September 30, March 31, March 31, September 30, March 31, 2016 2015 2015 2016 2015 2015 Gross amount recognized $ 172 $ 233 $ 307 $ 1,252 $ 1,727 $ 1,733 Gross amount eligible for offsetting (10 ) (8 ) (25 ) (10 ) (8 ) (25 ) Net amount $ 162 $ 225 $ 282 $ 1,242 $ 1,719 $ 1,708 The following tables present the location and amount of the effective portion of gains and losses gross of tax on derivative instruments and related hedge items reclassified from AOCI into the Company’s consolidated statements of income for the three and six months ended March 31, 2016 and 2015 and amounts recorded in AOCI net of tax in the consolidated statements of financial position (in millions): Amount of Gain (Loss) Reclassified from AOCI into Income Derivatives in ASC 815 Cash Flow Hedging Relationships Location of Gain (Loss) Reclassified from AOCI into Income Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Foreign currency exchange derivatives Cost of sales $ 5 $ (2 ) $ 5 $ (1 ) Commodity derivatives Cost of sales (5 ) (2 ) (9 ) (2 ) Forward treasury locks Net financing charges 1 1 1 1 Total $ 1 $ (3 ) $ (3 ) $ (2 ) Derivatives in ASC 815 Cash Flow Hedging Relationships Amount of Gain (Loss) Recognized in AOCI on Derivative March 31, 2016 September 30, 2015 March 31, 2015 Foreign currency exchange derivatives $ (6 ) $ (5 ) $ 1 Commodity derivatives (2 ) (7 ) (6 ) Forward treasury locks 4 5 5 Total $ (4 ) $ (7 ) $ — Amount of Gain (Loss) Recognized in Income on Derivative Derivatives in ASC 815 Fair Value Hedging Relationships Location of Gain (Loss) Recognized in Income on Derivative Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Interest rate swaps Net financing charges $ 2 $ 3 $ (3 ) $ 5 Fixed rate debt swapped to floating Net financing charges (2 ) (3 ) 3 (5 ) Total $ — $ — $ — $ — Amount of Gain (Loss) Recognized in Income on Derivative Derivatives Not Designated as Hedging Instruments under ASC 815 Location of Gain (Loss) Recognized in Income on Derivative Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Foreign currency exchange derivatives Cost of sales $ — $ (1 ) $ (1 ) $ (3 ) Foreign currency exchange derivatives Net financing charges (14 ) 2 (14 ) — Equity swap Selling, general and administrative (2 ) 8 (8 ) 27 Total $ (16 ) $ 9 $ (23 ) $ 24 The amount of losses recognized as cumulative translation adjustment (CTA) within AOCI on the effective portion of outstanding net investment hedges was $17 million at March 31, 2016 . The amount of gains recognized as CTA within AOCI on the effective portion of outstanding net investment hedges were $2 million and $12 million at September 30, 2015 and March 31, 2015 , respectively. For the three and six months ended March 31, 2016 and 2015 , no gains or losses were reclassified from CTA into income for the Company’s outstanding net investment hedges, and no gains or losses were recognized in income for the ineffective portion of cash flow hedges.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements ASC 820, "Fair Value Measurement," defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. ASC 820 also establishes a three-level fair value hierarchy that prioritizes information used in developing assumptions when pricing an asset or liability as follows: Level 1: Observable inputs such as quoted prices in active markets; Level 2: Inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and Level 3: Unobservable inputs where there is little or no market data, which requires the reporting entity to develop its own assumptions. ASC 820 requires the use of observable market data, when available, in making fair value measurements. When inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement. Recurring Fair Value Measurements The following tables present the Company’s fair value hierarchy for those assets and liabilities measured at fair value as of March 31, 2016 , September 30, 2015 and March 31, 2015 (in millions): Fair Value Measurements Using: Total as of March 31, 2016 Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other current assets Foreign currency exchange derivatives $ 21 $ — $ 21 $ — Commodity derivatives 1 — 1 — Other noncurrent assets Interest rate swaps 3 — 3 — Investments in marketable common stock 4 4 — — Equity swap 147 147 — — Total assets $ 176 $ 151 $ 25 $ — Other current liabilities Foreign currency exchange derivatives $ 60 $ — $ 60 $ — Commodity derivatives 3 — 3 — Cross-currency interest rate swaps 7 — 7 — Current portion of long-term debt Fixed rate debt swapped to floating 403 — 403 — Long-term debt Foreign currency denominated debt 329 329 — — Fixed rate debt swapped to floating 450 — 450 — Total liabilities $ 1,252 $ 329 $ 923 $ — Fair Value Measurements Using: Total as of September 30, 2015 Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other current assets Foreign currency exchange derivatives $ 58 $ — $ 58 $ — Interest rate swaps 1 — 1 — Cross-currency interest rate swaps 5 — 5 — Other noncurrent assets Interest rate swaps 5 — 5 — Investments in marketable common stock 4 4 — — Equity swap 164 164 — — Total assets $ 237 $ 168 $ 69 $ — Other current liabilities Foreign currency exchange derivatives $ 63 $ — $ 63 $ — Commodity derivatives 7 — 7 — Cross-currency interest rate swaps 1 — 1 — Current portion of long-term debt Fixed rate debt swapped to floating 801 — 801 — Long-term debt Fixed rate debt swapped to floating 855 — 855 — Total liabilities $ 1,727 $ — $ 1,727 $ — Fair Value Measurements Using: Total as of March 31, 2015 Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other current assets Foreign currency exchange derivatives $ 78 $ — $ 78 $ — Cross-currency interest rate swaps 20 — 20 — Interest rate swaps 2 — 2 — Other noncurrent assets Interest rate swaps 2 — 2 — Investments in marketable common stock 5 5 — — Equity swap 205 205 — — Total assets $ 312 $ 210 $ 102 $ — Other current liabilities Foreign currency exchange derivatives $ 72 $ — $ 72 $ — Commodity derivatives 7 — 7 — Current portion of long-term debt Fixed rate debt swapped to floating 801 — 801 — Long-term debt Fixed rate debt swapped to floating 853 — 853 — Total liabilities $ 1,733 $ — $ 1,733 $ — Valuation Methods Foreign currency exchange derivatives – The Company selectively hedges anticipated transactions that are subject to foreign exchange rate risk primarily using foreign currency exchange hedge contracts. The foreign currency exchange derivatives are valued under a market approach using publicized spot and forward prices. As cash flow hedges under ASC 815, "Derivatives and Hedging," the effective portion of the hedge gains or losses due to changes in fair value are initially recorded as a component of AOCI and are subsequently reclassified into earnings when the hedged transactions occur and affect earnings. Any ineffective portion of the hedge is reflected in the consolidated statements of income. These contracts were highly effective in hedging the variability in future cash flows attributable to changes in currency exchange rates at March 31, 2016 , September 30, 2015 and March 31, 2015 . The fair value of foreign currency exchange derivatives not designated as hedging instruments under ASC 815 are recorded in the consolidated statements of income. Commodity derivatives – The Company selectively hedges anticipated transactions that are subject to commodity price risk, primarily using commodity hedge contracts, to minimize overall price risk associated with the Company’s purchases of lead, copper, tin and aluminum. The commodity derivatives are valued under a market approach using publicized prices, where available, or dealer quotes. As cash flow hedges, the effective portion of the hedge gains or losses due to changes in fair value are initially recorded as a component of AOCI and are subsequently reclassified into earnings when the hedged transactions, typically sales, occur and affect earnings. Any ineffective portion of the hedge is reflected in the consolidated statements of income. These contracts were highly effective in hedging the variability in future cash flows attributable to changes in commodity prices at March 31, 2016 , September 30, 2015 and March 31, 2015 . Interest rate swaps and related debt – The Company selectively uses interest rate swaps to reduce market risk associated with changes in interest rates for its fixed-rate bonds. As fair value hedges, the interest rate swaps and related debt balances are valued under a market approach using publicized swap curves. Changes in the fair value of the swap and hedged portion of the debt are recorded in the consolidated statements of income. In the fourth quarter of fiscal 2013, the Company entered into four fixed to floating interest rate swaps totaling $800 million to hedge the coupon of its 5.5% notes that matured in January 2016. In the third quarter of fiscal 2014, the Company entered into four fixed to floating interest rate swaps totaling $400 million to hedge the coupon of its 2.6% notes maturing December 2016, three fixed to floating interest rate swaps totaling $300 million to hedge the coupon of its 1.4% notes maturing November 2017 and one fixed to floating interest rate swap totaling $150 million to hedge the coupon of its 7.125% notes maturing July 2017. There were eight interest rate swaps outstanding as of March 31, 2016 . There were twelve interest rate swaps outstanding as of September 30, 2015 and March 31, 2015 . Cross-currency interest rate swaps – The Company selectively uses cross-currency interest rate swaps to hedge the foreign currency rate risk associated with certain of its investments in Japan. The cross-currency interest rate swaps are valued using observable market data. Changes in the market value of the swaps are reflected in the CTA component of AOCI where they offset gains and losses recorded on the Company’s net investment in Japan. At March 31, 2016 , the Company had two cross-currency interest rate swaps outstanding totaling 10 billion yen. At September 30, 2015 and March 31, 2015 , the Company had four cross-currency interest rate swaps outstanding totaling 20 billion yen. Foreign currency denominated debt – The Company has entered into a foreign currency denominated debt obligation to selectively hedge portions of its net investment in Japan. The currency effect of the debt obligation is reflected in the CTA component of AOCI where it offsets gains and losses recorded on the Company’s net investment in Japan. The foreign denominated debt obligation is valued under a market approach using publicized spot prices. At March 31, 2016 , the Company had 37 billion yen of foreign denominated debt outstanding designated as net investment hedges in its net investment in Japan. The Company did not have any foreign denominated debt outstanding designated as a net investment hedge at September 30, 2015 or March 31, 2015 . Investments in marketable common stock – The Company invests in certain marketable common stock, which is valued under a market approach using publicized share prices. There were no unrealized gains or losses recorded in AOCI on these investments as of March 31, 2016 , September 30, 2015 and March 31, 2015 . Equity swaps – The Company selectively uses equity swaps to reduce market risk associated with certain of its stock-based compensation plans, such as its deferred compensation plans. The equity swaps are valued under a market approach as the fair value of the swaps is equal to the Company’s stock price at the reporting period date. Changes in fair value of the equity swaps are reflected in the consolidated statements of income within selling, general and administrative expenses. The fair values of cash and cash equivalents, accounts receivable, short-term debt and accounts payable approximate their carrying values. The fair value of long-term debt, which was $6.0 billion , $6.7 billion and $6.8 billion at March 31, 2016 , September 30, 2015 and March 31, 2015 , respectively, was determined primarily using market quotes classified as Level 1 inputs within the ASC 820 fair value hierarchy.

Impairment of Long-Lived Assets

Impairment of Long-Lived Assets (Notes)	6 Months Ended
	Mar. 31, 2016
Disclosure of Impairment of Long-Lived Assets [Abstract]
Asset Impairment Charges [Text Block]	Impairment of Long-Lived Assets The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the asset’s carrying amount may not be recoverable. The Company conducts its long-lived asset impairment analyses in accordance with ASC 360-10-15, "Impairment or Disposal of Long-Lived Assets." ASC 360-10-15 requires the Company to group assets and liabilities at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities and evaluate the asset group against the sum of the undiscounted future cash flows. If the undiscounted cash flows do not indicate the carrying amount of the asset group is recoverable, an impairment charge is measured as the amount by which the carrying amount of the asset group exceeds its fair value based on discounted cash flow analysis or appraisals. In the second quarter of fiscal 2016, the Company concluded it had a triggering event requiring assessment of impairment for certain of its long-lived assets in conjunction with its restructuring actions announced for its Automotive Experience and Building Efficiency businesses and at Corporate. As a result, the Company reviewed the long-lived assets for impairment and recorded a $29 million impairment charge within restructuring and impairment costs on the consolidated statements of income. Of the total impairment charge, $9 million related to the Automotive Experience Seating segment, $8 million related to the Building Efficiency Products North America segment, $5 million related to Corporate assets, $4 million related to the Building Efficiency Asia segment and $3 million related to the Building Efficiency Rest of World segment. Refer to Note 9, "Significant Restructuring and Impairment Costs," of the notes to consolidated financial statements for additional information. The impairments were measured, depending on the asset, under either an income approach utilizing forecasted discounted cash flows or a market approach utilizing an appraisal to determine fair values of the impaired assets. These methods are consistent with the methods the Company employed in prior periods to value other long-lived assets. The inputs utilized in the analyses are classified as Level 3 inputs within the fair value hierarchy as defined in ASC 820, "Fair Value Measurement." The Company concluded it did not have any other significant triggering events requiring assessment of impairment of its long-lived assets at March 31, 2016. At March 31, 2015, the Company concluded it did not have any significant triggering events requiring assessment of impairment of its long-lived assets.

Segment Information

Segment Information	6 Months Ended
	Mar. 31, 2016
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Segment Information	Segment Information Effective October 1, 2015, the Company reorganized the reportable segments within its Building Efficiency business to align with its new management reporting structure and business activities. Prior to this reorganization, Building Efficiency was comprised of three reportable segments for financial reporting purposes: North America Systems and Service, Asia and Other. As a result of this change, Building Efficiency is now comprised of four reportable segments for financial reporting purposes: Systems and Service North America, Products North America, Asia and Rest of World. Historical information has been revised to reflect the new Building Efficiency reportable segments. A summary of the significant Building Efficiency reportable segment changes is as follows: • The North America Unitary Products business, Air Distribution Technologies business and refrigeration systems business, as well as heating, ventilating and air conditioning (HVAC) products installed for Navy and Marine customers, previously included in the "Other" segment, are now part of a new reportable segment named "Products North America." • The building controls parts business in North America, previously included in the "North America Systems and Service" segment, is now part of the "Products North America" segment. • The remainder of the "Other" segment has been renamed "Rest of World." • Certain reportable segment allocation methodologies have been refined for centralized costs such as engineering and headquarters. ASC 280, "Segment Reporting," establishes the standards for reporting information about segments in financial statements. In applying the criteria set forth in ASC 280, the Company has determined that it has seven reportable segments for financial reporting purposes. The Company’s seven reportable segments are presented in the context of its three primary businesses – Building Efficiency, Automotive Experience and Power Solutions. Building Efficiency Building Efficiency designs, produces, markets and installs HVAC and control systems that monitor, automate and integrate critical building segment equipment and conditions including HVAC, fire-safety and security in commercial buildings and in various industrial applications. • Systems and Service North America provides products and services to non-residential building and industrial applications in the North American marketplace. The products and services include HVAC and controls systems, energy efficiency solutions and technical services, including inspection, scheduled maintenance, and repair and replacement of mechanical and control systems. • Products North America designs and produces heating and air conditioning solutions for residential and light commercial applications, and also markets products and refrigeration systems to the replacement and new construction markets in the North American marketplace. Products North America also includes HVAC products installed for Navy and Marine customers globally. • Asia provides HVAC, controls and refrigeration systems and technical services to the Asian marketplace. Asia also includes the Johnson Controls-Hitachi Air Conditioning joint venture, which was formed October 1, 2015. • Rest of World provides HVAC, controls and refrigeration systems and technical services to markets in Europe, the Middle East and Latin America. Automotive Experience Automotive Experience designs and manufactures interior systems and products for passenger cars and light trucks, including vans, pick-up trucks and sport utility/crossover vehicles. • Seating produces automotive seat metal structures and mechanisms, foam, trim, fabric and complete seat systems. • Interiors produces instrument panels, floor consoles and door panels. Power Solutions Power Solutions services both automotive original equipment manufacturers and the battery aftermarket by providing advanced battery technology, coupled with systems engineering, marketing and service expertise. Management evaluates the performance of the segments based primarily on segment income, which represents income from continuing operations before income taxes and noncontrolling interests excluding net financing charges, significant restructuring and impairment costs, and net mark-to-market adjustments on pension and postretirement plans. General corporate and other overhead expenses are allocated to segments in determining segment income. Financial information relating to the Company’s reportable segments is as follows (in millions): Net Sales Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Building Efficiency Systems and Service North America $ 1,034 $ 959 $ 2,018 $ 1,916 Products North America 546 545 1,103 1,103 Asia 1,162 428 2,154 929 Rest of World 408 445 831 926 3,150 2,377 6,106 4,874 Automotive Experience Seating 4,177 4,141 8,263 8,276 Interiors 121 1,092 268 2,240 4,298 5,233 8,531 10,516 Power Solutions 1,583 1,588 3,323 3,432 Total net sales $ 9,031 $ 9,198 $ 17,960 $ 18,822 Segment Income (Loss) Three Months Ended Six Months Ended 2016 2015 2016 2015 Building Efficiency Systems and Service North America $ 88 $ 84 $ 181 $ 148 Products North America 27 49 44 93 Asia 102 26 164 75 Rest of World 4 7 (1 ) 7 221 166 388 323 Automotive Experience Seating 184 229 350 430 Interiors 33 21 45 54 217 250 395 484 Power Solutions 264 264 606 579 Total segment income $ 702 $ 680 $ 1,389 $ 1,386 Restructuring and impairment costs (229 ) — (229 ) — Net financing charges (74 ) (69 ) (142 ) (140 ) Income from continuing operations before income taxes $ 399 $ 611 $ 1,018 $ 1,246

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The Company accrues for potential environmental liabilities when it is probable a liability has been incurred and the amount of the liability is reasonably estimable. Reserves for environmental liabilities totaled $25 million , $23 million and $22 million at March 31, 2016 , September 30, 2015 and March 31, 2015 , respectively. The Company reviews the status of its environmental sites on a quarterly basis and adjusts its reserves accordingly. Such potential liabilities accrued by the Company do not take into consideration possible recoveries of future insurance proceeds. They do, however, take into account the likely share other parties will bear at remediation sites. It is difficult to estimate the Company’s ultimate level of liability at many remediation sites due to the large number of other parties that may be involved, the complexity of determining the relative liability among those parties, the uncertainty as to the nature and scope of the investigations and remediation to be conducted, the uncertainty in the application of law and risk assessment, the various choices and costs associated with diverse technologies that may be used in corrective actions at the sites, and the often quite lengthy periods over which eventual remediation may occur. Nevertheless, the Company does not currently believe that any claims, penalties or costs in connection with known environmental matters will have a material adverse effect on the Company’s financial position, results of operations or cash flows. In addition, the Company has identified asset retirement obligations for environmental matters that are expected to be addressed at the retirement, disposal, removal or abandonment of existing owned facilities, primarily in the Power Solutions and Building Efficiency businesses. At March 31, 2016 , September 30, 2015 and March 31, 2015 , the Company recorded conditional asset retirement obligations of $76 million , $59 million and $64 million , respectively. The Company is involved in various lawsuits, claims and proceedings incident to the operation of its businesses, including those pertaining to product liability, environmental, safety and health, intellectual property, employment, commercial and contractual matters, and various other casualty matters. Although the outcome of litigation cannot be predicted with certainty and some lawsuits, claims or proceedings may be disposed of unfavorably to us, it is management’s opinion that none of these will have a material adverse effect on the Company’s financial position, results of operations or cash flows. Costs related to such matters were not material to the periods presented.

Merger Transaction (Notes)

Merger Transaction (Notes)	6 Months Ended
	Mar. 31, 2016
Merger Transaction [Abstract]
Merger Transaction [Text Block]	Acquisitions and Divestitures On October 1, 2015, the Company formed a joint venture with Hitachi to expand its Building Efficiency product offerings. The Company acquired a 60 percent ownership interest in the new entity for approximately $133 million ( $563 million purchase price less cash acquired of $430 million ). The purchase price, net of cash acquired, was paid as of March 31, 2016. In connection with the acquisition, the Company recorded goodwill of $193 million related to purchase price allocations. The purchase price allocations may be subsequently adjusted to reflect final valuation studies. In the first six months of fiscal 2016, the Company completed one acquisition for a purchase price, net of cash acquired, of $3 million , none of which was paid as of March 31, 2016. The acquisition was not material to the Company's consolidated financial statements. In connection with the acquisition, the Company recorded goodwill of $4 million . The purchase price allocation may be subsequently adjusted to reflect the final valuation study. The acquisition increased the Company's ownership from a noncontrolling to controlling interest. As a result, the Company recorded a non-cash gain of $4 million in equity income for the Building Efficiency Rest of World segment to adjust the Company's existing equity investment in the partially-owned affiliate to fair value. In the first six months of fiscal 2015, the Company completed three acquisitions for a combined purchase price, net of cash acquired, of $47 million , $18 million of which was paid in the six months ended March 31, 2015 . The acquisitions in the aggregate were not material to the Company’s consolidated financial statements. In connection with the acquisitions, the Company recorded goodwill of $9 million . In the first six months of fiscal 2015, the Company adjusted the purchase price allocation of the fiscal 2014 acquisition of Air Distribution Technologies Inc. (ADT). The adjustment was made as a result of a true-up to the purchase price in the amount of $4 million , all of which was paid in the six months ended March 31, 2015 . Also, in connection with this acquisition, the Company recorded additional goodwill of $21 million in fiscal 2015 related to the purchase price allocations. In fiscal 2014, the Company recorded goodwill of $837 million in the Building Efficiency Products North America segment as a result of the ADT acquisition. In the three months ended March 31, 2015, the Company completed the sale of its interests in two GWS joint ventures to Brookfield Asset Management, Inc. The selling price, net of cash divested, was $141 million , all of which was received as of March 31, 2015. In connection with the sale, the Company recorded a $200 million gain, $127 million net of tax, within income from discontinued operations, net of tax on the consolidated statements of income and reduced goodwill in assets held for sale by $20 million . On January 25, 2016, the Company announced that it had entered into a definitive merger agreement (the "Merger Agreement") with Tyco International plc ("Tyco"), an indirect wholly owned subsidiary of Tyco ("Merger Sub") and the other party thereto under which the Company will combine with Tyco, a global fire and security provider. Under the terms of the agreement, which has been unanimously approved by the boards of directors of both parties, each outstanding share of the Company’s common stock, other than shares held by the Company, its subsidiaries, Tyco or Merger Sub, will be converted into the right to receive (subject to proration as described below), at the holder’s election, either: (i) one (1) (the "Exchange Ratio") ordinary share of the combined company (the "Share Consideration"); or (ii) an amount in cash equal to $34.88 (the "Cash Consideration"). Elections will be prorated so that Company shareholders will receive in the aggregate approximately $3.864 billion of cash in the merger. Holders that do not make an election will be treated as having elected to receive the Share Consideration. The Exchange Ratio takes into account the effects of a Tyco share consolidation contemplated by the Merger Agreement whereby, immediately prior to the merger, every issued and unissued ordinary share of Tyco will be consolidated into 0.955 of a share of Tyco. As a result of the merger, the Company's shareholders will own approximately 56 percent of the equity of the combined company, and Tyco shareholders will own approximately 44 percent of the equity of the combined company. The merger is expected to be consummated on or around the end of the Company’s 2016 fiscal year, subject to certain closing conditions, including, among others, (i) the approval and adoption of the Merger Agreement by holders of two thirds of the shares of the Company’s common stock entitled to vote on such matter, (ii) the approval by the Tyco shareholders at a special meeting of the Tyco shareholders (the "Tyco Special Meeting") of (A) the issuance of Tyco shares in connection with the merger, (B) the Tyco share consolidation and (C) the increase in Tyco’s authorized share capital, in each case, by a majority of the votes cast on these matters at the Tyco Special Meeting, and of certain amendments to Tyco’s articles of association, including a change of its name to "Johnson Controls plc," by at least 75% of the votes cast on these matters at the Tyco Special Meeting, (iii) the expiration or termination of any waiting period applicable to the merger under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, the consent of, or filing with, certain specified antitrust authorities, and certain other customary regulatory approvals, and (iv) Tyco’s obtaining the financing required to close the merger on the terms set forth in the Merger Agreement. Under the terms of the Merger Agreement, the combined company will be renamed "Johnson Controls plc," and the shares of the combined company will be listed on the New York Stock Exchange and trade under the symbol "JCI." The Merger Agreement also provides for the combined company to maintain Tyco’s Irish legal domicile and global headquarters in Cork, Ireland and for its primary operational headquarters in North America to be in Milwaukee, Wisconsin. At the effective time of the merger, the board of directors of the combined company will consist of eleven directors, six of whom will be directors of the Company’s board of directors prior to the closing and five of whom will be directors of the Tyco board of directors prior to the closing, comprised of the Company’s and Tyco’s current Chief Executive Officers and nine other directors to be mutually agreed between the Company and Tyco. One of the six directors from the Company’s board of directors prior to the closing shall be elected independent lead director. As of the effective time of the merger, Alex A. Molinaroli, the Company’s current Chairman, President, and Chief Executive Officer, will be appointed as Chairman and Chief Executive Officer of the combined company, and George R. Oliver, Tyco’s current Chief Executive Officer, will serve as President and Chief Operating Officer of the combined company. Mr. Oliver will succeed Mr. Molinaroli as Chief Executive Officer on the 18-month anniversary of the effective time (or such earlier time that Mr. Molinaroli ceases to be Chief Executive Officer). At that time, Mr. Molinaroli will become the Executive Chair, with the executive functions set forth in his employment agreement, and will serve in such role for 12 months . Following such 12-month period (or such earlier time that Mr. Molinaroli ceases to be Chairman) (the "Second Succession Date"), Mr. Oliver will become Chairman and Chief Executive Officer of the combined company. From the effective time until the date that is 3 months after the Second Succession Date, the appointment, removal or replacement of the Chief Executive Officer, Chairman, Executive Chairman, President or Chief Operating Officer of the combined company other than as described in this paragraph would require the affirmative vote of at least 75% of the non-executive directors of the combined company.

Financial Statements (Tables)

Financial Statements (Tables)	6 Months Ended
	Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
New Accounting Pronouncement, Early Adoption [Table Text Block]	The impact of all adjustments made to the March 31, 2015 consolidated statements of financial position presented is summarized in the following table (in millions): March 31, 2015 Previously Reported Revised Effect of Change Consolidated Statement of Financial Position Other current assets $ 2,262 $ 1,790 $ (472 ) Other noncurrent assets 2,709 3,091 382 Other current liabilities 2,870 2,807 (63 ) Other noncurrent liabilities 1,861 1,834 (27 )
Carrying Amounts and Classification of Assets and Liabilities for Consolidated VIEs	The carrying amounts and classification of assets (none of which are restricted) and liabilities included in the Company’s consolidated statements of financial position for the consolidated VIEs are as follows (in millions): March 31, 2016 September 30, 2015 March 31, 2015 Current assets $ 308 $ 281 $ 269 Noncurrent assets 123 128 134 Total assets $ 431 $ 409 $ 403 Current liabilities $ 225 $ 232 $ 200 Noncurrent liabilities 32 34 35 Total liabilities $ 257 $ 266 $ 235

Financial Statements Early Adop

Financial Statements Early Adoption of New Accounting Pronouncement (Tables)	6 Months Ended
	Mar. 31, 2016
New Accounting Pronouncement, Early Adoption [Line Items]
New Accounting Pronouncement, Early Adoption [Table Text Block]	The impact of all adjustments made to the March 31, 2015 consolidated statements of financial position presented is summarized in the following table (in millions): March 31, 2015 Previously Reported Revised Effect of Change Consolidated Statement of Financial Position Other current assets $ 2,262 $ 1,790 $ (472 ) Other noncurrent assets 2,709 3,091 382 Other current liabilities 2,870 2,807 (63 ) Other noncurrent liabilities 1,861 1,834 (27 )

Discontinued Operations (Tables

Discontinued Operations (Tables)	6 Months Ended
	Mar. 31, 2016
Discontinued Operations [Abstract]
Discontinued Operations by Disposal Group - Global Workplace Solutions	The following table summarizes the results of GWS, reclassified as discontinued operations for the three and six month periods ended March 31, 2015 (in millions): Three Months Ended Six Months Ended 2015 2015 Net sales $ 803 $ 1,845 Income from discontinued operations before income taxes 227 269 Provision for income taxes on discontinued operations 149 162 Income from discontinued operations attributable to noncontrolling interests, net of tax 1 4 Income from discontinued operations $ 77 $ 103
Assets and Liabilities Held for Sale, Specific Transactions	The following table summarizes the carrying value of the Interiors and GWS assets and liabilities held for sale (in millions): March 31, 2015 Interiors Global Workplace Solutions Total Accounts receivable - net $ 583 $ 582 $ 1,165 Inventories 219 6 225 Other current assets 175 80 255 Property, plant and equipment - net 583 26 609 Goodwill 21 216 237 Other intangible assets - net 3 18 21 Investments in partially-owned affiliates 58 — 58 Other noncurrent assets 36 56 92 Assets held for sale $ 1,678 $ 984 $ 2,662 Short-term debt $ 18 $ 1 $ 19 Accounts payable 633 425 1,058 Accrued compensation and benefits 42 71 113 Other current liabilities 165 156 321 Liabilities held for sale $ 858 $ 653 $ 1,511

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Mar. 31, 2016
Inventory Disclosure [Abstract]
Inventories	Inventories consisted of the following (in millions): March 31, 2016 September 30, 2015 March 31, 2015 Raw materials and supplies $ 1,241 $ 1,084 $ 1,062 Work-in-process 439 369 391 Finished goods 1,242 924 961 Inventories $ 2,922 $ 2,377 $ 2,414

Goodwill and Other Intangible31

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill in each of the Company’s reportable segments for the six month period ended September 30, 2015 and the six month period ended March 31, 2016 were as follows (in millions): Business Acquisitions Business Divestitures Currency Translation and Other March 31, September 30, 2015 2015 Building Efficiency Systems and Service North America $ 982 $ — $ (2 ) $ (2 ) $ 978 Products North America 1,697 13 (14 ) 5 1,701 Asia 402 — — (13 ) 389 Rest of World 296 — — 14 310 Automotive Experience Seating 2,327 — (4 ) 41 2,364 Power Solutions 1,084 — — (2 ) 1,082 Total $ 6,788 $ 13 $ (20 ) $ 43 $ 6,824 Business Acquisitions Business Divestitures Currency Translation and Other September 30, March 31, 2015 2016 Building Efficiency Systems and Service North America $ 978 $ — $ — $ — $ 978 Products North America 1,701 — — — 1,701 Asia 389 193 — (12 ) 570 Rest of World 310 4 — 2 316 Automotive Experience Seating 2,364 — — 26 2,390 Power Solutions 1,082 — — 5 1,087 Total $ 6,824 $ 197 $ — $ 21 $ 7,042
Other Intangible Assets	The Company’s other intangible assets, primarily from business acquisitions valued based on independent appraisals, consisted of (in millions): March 31, 2016 September 30, 2015 March 31, 2015 Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Amortized intangible assets Patented technology $ 47 $ (28 ) $ 19 $ 80 $ (59 ) $ 21 $ 82 $ (58 ) $ 24 Customer relationships 1,013 (238 ) 775 975 (206 ) 769 982 (180 ) 802 Miscellaneous 383 (144 ) 239 307 (123 ) 184 296 (107 ) 189 Total amortized intangible assets 1,443 (410 ) 1,033 1,362 (388 ) 974 1,360 (345 ) 1,015 Unamortized intangible assets Trademarks/trade names 543 — 543 542 — 542 543 — 543 Total intangible assets $ 1,986 $ (410 ) $ 1,576 $ 1,904 $ (388 ) $ 1,516 $ 1,903 $ (345 ) $ 1,558

Product Warranties (Tables)

Product Warranties (Tables)	6 Months Ended
	Mar. 31, 2016
Product Warranties Disclosures [Abstract]
Changes in Carrying Amount of Product Warranty Liability	The changes in the carrying amount of the Company’s total product warranty liability, including extended warranties for which deferred revenue is recorded, for the six months ended March 31, 2016 and 2015 were as follows (in millions): Six Months Ended 2016 2015 Balance at beginning of period $ 300 $ 319 Accruals for warranties issued during the period 157 136 Accruals from acquisition and divestitures 37 — Accruals related to pre-existing warranties (including changes in estimates) 8 (2 ) Settlements made (in cash or in kind) during the period (152 ) (144 ) Currency translation 2 (7 ) Balance at end of period $ 352 $ 302

Significant Restructuring Cos33

Significant Restructuring Costs Changes in Restructuring Reserve - 2016 Restructuring Plan (Tables)	6 Months Ended
	Mar. 31, 2016
2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]	The following table summarizes the changes in the Company’s 2016 Plan reserve, included within other current liabilities in the consolidated statements of financial position (in millions): Employee Severance and Termination Benefits Long-Lived Asset Impairments Other Currency Total Original Reserve $ 194 $ 29 $ 6 $ — $ 229 Utilized—cash (3 ) — (1 ) — (4 ) Utilized—noncash — (29 ) — 2 (27 ) Balance at March 31, 2016 $ 191 $ — $ 5 $ 2 $ 198

Changes in Restructuring Reserv

Changes in Restructuring Reserve - 2015 Restructuring Plan (Tables)	6 Months Ended
	Mar. 31, 2016
2015 Restructuring Plan [Domain]
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]	The following table summarizes the changes in the Company’s 2015 Plan reserve, included within other current liabilities in the consolidated statements of financial position (in millions): Employee Severance and Termination Benefits Long-Lived Asset Impairments Other Currency Total Original Reserve $ 191 $ 183 $ 23 $ — $ 397 Utilized—cash — — — — — Utilized—noncash — (183 ) — — (183 ) Balance at September 30, 2015 $ 191 $ — $ 23 $ — $ 214 Utilized—cash (37 ) — (23 ) — (60 ) Utilized—noncash — — — 2 2 Balance at March 31, 2016 $ 154 $ — $ — $ 2 $ 156

Significant Restructuring Cos35

Significant Restructuring Costs Changes in Restructuring Reserve - 2014 Restructuring Plan (Tables)	6 Months Ended
	Mar. 31, 2016
2014 Restructuring Plan
Changes in Restructuring Reserve - 2014 Restructuring Plan [Line Items]
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]	The following table summarizes the changes in the Company’s 2014 Plan reserve, included within other current liabilities in the consolidated statements of financial position (in millions): Employee Severance and Termination Benefits Long-Lived Asset Impairments Goodwill Impairment Other Currency Total Original Reserve $ 191 $ 134 $ 47 $ 5 $ — $ 377 Utilized—cash (8 ) — — — — (8 ) Utilized—noncash — (134 ) (47 ) — (6 ) (187 ) Balance at September 30, 2014 $ 183 $ — $ — $ 5 $ (6 ) $ 182 Utilized—cash (65 ) — — (5 ) — (70 ) Utilized—noncash — — — — (13 ) (13 ) Balance at September 30, 2015 $ 118 $ — $ — $ — $ (19 ) $ 99 Utilized—cash (31 ) — — — — (31 ) Utilized—noncash — — — — (2 ) (2 ) Balance at March 31, 2016 $ 87 $ — $ — $ — $ (21 ) $ 66

Significant Restructuring Cos36

Significant Restructuring Costs Changes in Restructuring Reserve - 2013 Restructuring Plan (Tables)	6 Months Ended
	Mar. 31, 2016
2013 Restructuring Plan
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]	The following table summarizes the changes in the Company’s 2013 Plan reserve, included within other current liabilities in the consolidated statements of financial position (in millions): Employee Severance and Termination Benefits Long-Lived Asset Impairments Goodwill Impairment Other Currency Total Original Reserve $ 392 $ 156 $ 430 $ 7 $ — $ 985 Utilized—cash (26 ) — — — — (26 ) Utilized—noncash — (156 ) (430 ) (4 ) 4 (586 ) Transfer to liabilities held for sale (31 ) — — — — (31 ) Balance at September 30, 2013 $ 335 $ — $ — $ 3 $ 4 $ 342 Utilized—cash (144 ) — — (3 ) — (147 ) Utilized—noncash — — — — (11 ) (11 ) Transfer from liabilities held for sale 31 — — — — 31 Transfer to liabilities held for sale (24 ) — — — — (24 ) Balance at September 30, 2014 $ 198 $ — $ — $ — $ (7 ) $ 191 Utilized—cash (113 ) — — — — (113 ) Utilized—noncash — — — — (10 ) (10 ) Balance at September 30, 2015 $ 85 $ — $ — $ — $ (17 ) $ 68 Utilized—cash (33 ) — — — — (33 ) Utilized—noncash — — — — (1 ) (1 ) Balance at March 31, 2016 $ 52 $ — $ — $ — $ (18 ) $ 34

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Tax Jurisdictions and Years Currently under Audit Exam	In the U.S., fiscal years 2013 through 2014 are currently under exam by the Internal Revenue Service. Additionally, the Company is currently under exam in the following major foreign jurisdictions: Tax Jurisdiction Tax Years Covered Belgium 2010 - 2012 Brazil 2004 - 2008, 2011 - 2012 Canada 2008 - 2013 France 2002 - 2013 Germany 2007 - 2012 Italy 2006, 2011 Korea 2008 - 2014 Mexico 2011 Spain 2013 United Kingdom 2011 - 2013

Pension and Postretirement Pl38

Pension and Postretirement Plans (Tables)	6 Months Ended
	Mar. 31, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Components of Net Periodic Benefit Cost	The components of the Company’s net periodic benefit costs from continuing operations associated with its defined benefit pension and postretirement plans are shown in the tables below in accordance with ASC 715, "Compensation – Retirement Benefits" (in millions): U.S. Pension Plans Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Service cost $ 4 $ 7 $ 8 $ 15 Interest cost 25 31 50 61 Expected return on plan assets (46 ) (45 ) (93 ) (90 ) Net periodic benefit credit $ (17 ) $ (7 ) $ (35 ) $ (14 ) Non-U.S. Pension Plans Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Service cost $ 4 $ 6 $ 9 $ 13 Interest cost 10 12 20 24 Expected return on plan assets (13 ) (13 ) (26 ) (26 ) Net periodic benefit cost $ 1 $ 5 $ 3 $ 11 Postretirement Benefits Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Service cost $ — $ — $ 1 $ 1 Interest cost 2 3 3 5 Expected return on plan assets (2 ) (3 ) (5 ) (6 ) Amortization of prior service credit (1 ) (1 ) (1 ) (1 ) Net periodic benefit credit $ (1 ) $ (1 ) $ (2 ) $ (1 )

Debt and Financing Arrangemen39

Debt and Financing Arrangements (Tables)	6 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Components of Net Financing Charges	The Company's net financing charges line item in the consolidated statements of income for the three and six month periods ended March 31, 2016 and 2015 contained the following components (in millions): Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Interest expense, net of capitalized interest costs $ 69 $ 72 $ 142 $ 143 Banking fees and bond cost amortization 5 6 13 12 Interest income (3 ) (1 ) (5 ) (4 ) Net foreign exchange results for financing activities 3 (8 ) (8 ) (11 ) Net financing charges $ 74 $ 69 $ 142 $ 140

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
Earnings Per Share	The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share (in millions): Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Income (Loss) Available to Common Shareholders Income (loss) from continuing operations $ (530 ) $ 452 $ (80 ) $ 933 Income from discontinued operations — 77 — 103 Basic and diluted income (loss) available to common shareholders $ (530 ) $ 529 $ (80 ) $ 1,036 Weighted Average Shares Outstanding Basic weighted average shares outstanding 648.2 654.4 648.0 657.9 Effect of dilutive securities: Stock options, unvested restricted stock and unvested performance share awards — 6.8 — 6.8 Diluted weighted average shares outstanding 648.2 661.2 648.0 664.7 Antidilutive Securities Options to purchase common shares — 0.5 — 0.4

Equity and Noncontrolling Int41

Equity and Noncontrolling Interests (Tables)	6 Months Ended
	Mar. 31, 2016
Stockholders' Equity Note [Abstract]
Equity Attributable to Johnson Controls, Inc. and Noncontrolling Interests	The following schedules present changes in consolidated equity attributable to Johnson Controls, Inc. and noncontrolling interests (in millions, net of tax): Three Months Ended March 31, 2016 Three Months Ended March 31, 2015 Equity Attributable to Johnson Controls, Inc. Equity Attributable to Noncontrolling Interests Total Equity Equity Attributable to Johnson Controls, Inc. Equity Attributable to Noncontrolling Interests Total Equity Beginning balance, December 31 $ 10,506 $ 931 $ 11,437 $ 10,823 $ 263 $ 11,086 Total comprehensive income (loss): Net income (loss) (530 ) 50 (480 ) 529 16 545 Foreign currency translation adjustments 175 18 193 (481 ) (3 ) (484 ) Realized and unrealized gains on derivatives 4 1 5 6 — 6 Other comprehensive income (loss) 179 19 198 (475 ) (3 ) (478 ) Comprehensive income (loss) (351 ) 69 (282 ) 54 13 67 Other changes in equity: Cash dividends—common stock (189 ) — (189 ) (170 ) — (170 ) Dividends attributable to noncontrolling interests — (29 ) (29 ) — (8 ) (8 ) Repurchases of common stock — — — (210 ) — (210 ) Change in noncontrolling interest share — (73 ) (73 ) — (69 ) (69 ) Other, including options exercised 18 — 18 86 — 86 Ending balance, March 31 $ 9,984 $ 898 $ 10,882 $ 10,583 $ 199 $ 10,782 Six Months Ended March 31, 2016 Six Months Ended March 31, 2015 Equity Attributable to Johnson Controls, Inc. Equity Attributable to Noncontrolling Interests Total Equity Equity Attributable to Johnson Controls, Inc. Equity Attributable to Noncontrolling Interests Total Equity Beginning balance, September 30 $ 10,376 $ 163 $ 10,539 $ 11,311 $ 251 $ 11,562 Total comprehensive income (loss): Net income (loss) (80 ) 70 (10 ) 1,036 36 1,072 Foreign currency translation adjustments 15 9 24 (832 ) (3 ) (835 ) Realized and unrealized gains (losses) on derivatives 3 1 4 (4 ) — (4 ) Pension and postretirement plans — — — (3 ) — (3 ) Other comprehensive income (loss) 18 10 28 (839 ) (3 ) (842 ) Comprehensive income (loss) (62 ) 80 18 197 33 230 Other changes in equity: Cash dividends—common stock (377 ) — (377 ) (342 ) — (342 ) Dividends attributable to noncontrolling interests — (36 ) (36 ) — (16 ) (16 ) Repurchases of common stock — — — (810 ) — (810 ) Change in noncontrolling interest share — 691 691 — (69 ) (69 ) Other, including options exercised 47 — 47 227 — 227 Ending balance, March 31 $ 9,984 $ 898 $ 10,882 $ 10,583 $ 199 $ 10,782
Changes in Redeemable Noncontrolling Interests	The following schedules present changes in the redeemable noncontrolling interests (in millions): Three Months Ended 2016 2015 Beginning balance, December 31 $ 216 $ 209 Net income 11 12 Foreign currency translation adjustments 10 (20 ) Realized and unrealized gains on derivatives — 1 Ending balance, March 31 $ 237 $ 202 Six Months Ended 2016 2015 Beginning balance, September 30 $ 212 $ 194 Net income 31 31 Foreign currency translation adjustments 2 (20 ) Realized and unrealized gains (losses) on derivatives (2 ) 1 Dividends (6 ) (4 ) Ending balance, March 31 $ 237 $ 202
Changes in Accumulated Other Comprehensive Income, Net of Tax	The following schedules present changes in accumulated other comprehensive income (AOCI) attributable to Johnson Controls, Inc. (in millions, net of tax): Three Months Ended March 31, 2016 2015 Foreign currency translation adjustments Balance at beginning of period $ (1,207 ) $ (599 ) Aggregate adjustment for the period (net of tax effect of $5 and $(4)) 175 (481 ) Balance at end of period (1,032 ) (1,080 ) Realized and unrealized gains (losses) on derivatives Balance at beginning of period (8 ) (6 ) Current period changes in fair value (net of tax effect of $1 and $1) 5 4 Reclassification to income (net of tax effect of $0 and $1) * (1 ) 2 Balance at end of period (4 ) — Pension and postretirement plans Balance at beginning of period (3 ) 4 Reclassification to income (net of tax effect of $0) ** (1 ) (1 ) Other changes (net of tax effect of $0) 1 1 Balance at end of period (3 ) 4 Accumulated other comprehensive loss, end of period $ (1,039 ) $ (1,076 ) Six Months Ended March 31, 2016 2015 Foreign currency translation adjustments Balance at beginning of period $ (1,047 ) $ (248 ) Aggregate adjustment for the period (net of tax effect of $1 and $(2)) 15 (832 ) Balance at end of period (1,032 ) (1,080 ) Realized and unrealized gains (losses) on derivatives Balance at beginning of period (7 ) 4 Current period changes in fair value (net of tax effect of $1 and $(4)) 1 (5 ) Reclassification to income (net of tax effect of $1 and $1) * 2 1 Balance at end of period (4 ) — Pension and postretirement plans Balance at beginning of period (3 ) 7 Reclassification to income (net of tax effect of $0 and $(1)) ** (1 ) (4 ) Other changes (net of tax effect of $0) 1 1 Balance at end of period (3 ) 4 Accumulated other comprehensive loss, end of period $ (1,039 ) $ (1,076 ) * Refer to Note 15, "Derivative Instruments and Hedging Activities," of the notes to consolidated financial statements for disclosure of the line items on the consolidated statements of income affected by reclassifications from AOCI into income related to derivatives. ** Refer to Note 11, "Pension and Postretirement Plans," of the notes to consolidated financial statements for disclosure of the components of the Company's net periodic benefit costs associated with its defined benefit pension and postretirement plans. For the three and six months ended March 31, 2016, the amounts reclassified from AOCI into income for pension and postretirement plans were primarily recorded in selling, general and administrative expenses on the consolidated statements of income. For the three and six months ended March 31, 2015 , the amounts reclassified from AOCI into income for pension and postretirement plans were primarily recorded in selling, general and administrative expenses and income from discontinued operations, net of tax on the consolidated statements of income.

Derivative Instruments and He42

Derivative Instruments and Hedging Activities (Tables)	6 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Outstanding Commodity Hedge Contracts	The Company had the following outstanding contracts to hedge forecasted commodity purchases: Volume Outstanding as of Commodity Units March 31, 2016 September 30, 2015 March 31, 2015 Copper Pounds 7,155,000 14,648,000 7,805,000 Lead Metric Tons 4,595 6,785 10,952 Aluminum Metric Tons 2,785 5,700 1,830 Tin Metric Tons 688 2,080 1,000
Location and Fair Values of Derivative Instruments and Hedging Activities	The following table presents the location and fair values of derivative instruments and hedging activities included in the Company’s consolidated statements of financial position (in millions): Derivatives and Hedging Activities Designated as Hedging Instruments under ASC 815 Derivatives and Hedging Activities Not Designated as Hedging Instruments under ASC 815 March 31, September 30, March 31, March 31, September 30, March 31, 2016 2015 2015 2016 2015 2015 Other current assets Foreign currency exchange derivatives $ 21 $ 31 $ 50 $ — $ 27 $ 28 Commodity derivatives 1 — — — — — Interest rate swaps — 1 2 — — — Cross-currency interest rate swaps — 5 20 — — — Other noncurrent assets Interest rate swaps 3 5 2 — — — Equity swap — — — 147 164 205 Total assets $ 25 $ 42 $ 74 $ 147 $ 191 $ 233 Other current liabilities Foreign currency exchange derivatives $ 30 $ 37 $ 50 $ 30 $ 26 $ 22 Commodity derivatives 3 7 7 — — — Cross-currency interest rate swaps 7 1 — — — — Current portion of long-term debt Fixed rate debt swapped to floating 403 801 801 — — — Long-term debt Foreign currency denominated debt 329 — — — — — Fixed rate debt swapped to floating 450 855 853 — — — Total liabilities $ 1,222 $ 1,701 $ 1,711 $ 30 $ 26 $ 22
Offsetting Assets and Liabilities	The gross and net amounts of derivative assets and liabilities were as follows (in millions): Fair Value of Assets Fair Value of Liabilities March 31, September 30, March 31, March 31, September 30, March 31, 2016 2015 2015 2016 2015 2015 Gross amount recognized $ 172 $ 233 $ 307 $ 1,252 $ 1,727 $ 1,733 Gross amount eligible for offsetting (10 ) (8 ) (25 ) (10 ) (8 ) (25 ) Net amount $ 162 $ 225 $ 282 $ 1,242 $ 1,719 $ 1,708
Location and Amount of Gains and Losses Gross of Tax on Derivative Instruments and Related Hedge Items	The following tables present the location and amount of the effective portion of gains and losses gross of tax on derivative instruments and related hedge items reclassified from AOCI into the Company’s consolidated statements of income for the three and six months ended March 31, 2016 and 2015 and amounts recorded in AOCI net of tax in the consolidated statements of financial position (in millions): Amount of Gain (Loss) Reclassified from AOCI into Income Derivatives in ASC 815 Cash Flow Hedging Relationships Location of Gain (Loss) Reclassified from AOCI into Income Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Foreign currency exchange derivatives Cost of sales $ 5 $ (2 ) $ 5 $ (1 ) Commodity derivatives Cost of sales (5 ) (2 ) (9 ) (2 ) Forward treasury locks Net financing charges 1 1 1 1 Total $ 1 $ (3 ) $ (3 ) $ (2 ) Derivatives in ASC 815 Cash Flow Hedging Relationships Amount of Gain (Loss) Recognized in AOCI on Derivative March 31, 2016 September 30, 2015 March 31, 2015 Foreign currency exchange derivatives $ (6 ) $ (5 ) $ 1 Commodity derivatives (2 ) (7 ) (6 ) Forward treasury locks 4 5 5 Total $ (4 ) $ (7 ) $ — Amount of Gain (Loss) Recognized in Income on Derivative Derivatives in ASC 815 Fair Value Hedging Relationships Location of Gain (Loss) Recognized in Income on Derivative Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Interest rate swaps Net financing charges $ 2 $ 3 $ (3 ) $ 5 Fixed rate debt swapped to floating Net financing charges (2 ) (3 ) 3 (5 ) Total $ — $ — $ — $ — Amount of Gain (Loss) Recognized in Income on Derivative Derivatives Not Designated as Hedging Instruments under ASC 815 Location of Gain (Loss) Recognized in Income on Derivative Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Foreign currency exchange derivatives Cost of sales $ — $ (1 ) $ (1 ) $ (3 ) Foreign currency exchange derivatives Net financing charges (14 ) 2 (14 ) — Equity swap Selling, general and administrative (2 ) 8 (8 ) 27 Total $ (16 ) $ 9 $ (23 ) $ 24

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value	The following tables present the Company’s fair value hierarchy for those assets and liabilities measured at fair value as of March 31, 2016 , September 30, 2015 and March 31, 2015 (in millions): Fair Value Measurements Using: Total as of March 31, 2016 Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other current assets Foreign currency exchange derivatives $ 21 $ — $ 21 $ — Commodity derivatives 1 — 1 — Other noncurrent assets Interest rate swaps 3 — 3 — Investments in marketable common stock 4 4 — — Equity swap 147 147 — — Total assets $ 176 $ 151 $ 25 $ — Other current liabilities Foreign currency exchange derivatives $ 60 $ — $ 60 $ — Commodity derivatives 3 — 3 — Cross-currency interest rate swaps 7 — 7 — Current portion of long-term debt Fixed rate debt swapped to floating 403 — 403 — Long-term debt Foreign currency denominated debt 329 329 — — Fixed rate debt swapped to floating 450 — 450 — Total liabilities $ 1,252 $ 329 $ 923 $ — Fair Value Measurements Using: Total as of September 30, 2015 Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other current assets Foreign currency exchange derivatives $ 58 $ — $ 58 $ — Interest rate swaps 1 — 1 — Cross-currency interest rate swaps 5 — 5 — Other noncurrent assets Interest rate swaps 5 — 5 — Investments in marketable common stock 4 4 — — Equity swap 164 164 — — Total assets $ 237 $ 168 $ 69 $ — Other current liabilities Foreign currency exchange derivatives $ 63 $ — $ 63 $ — Commodity derivatives 7 — 7 — Cross-currency interest rate swaps 1 — 1 — Current portion of long-term debt Fixed rate debt swapped to floating 801 — 801 — Long-term debt Fixed rate debt swapped to floating 855 — 855 — Total liabilities $ 1,727 $ — $ 1,727 $ — Fair Value Measurements Using: Total as of March 31, 2015 Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other current assets Foreign currency exchange derivatives $ 78 $ — $ 78 $ — Cross-currency interest rate swaps 20 — 20 — Interest rate swaps 2 — 2 — Other noncurrent assets Interest rate swaps 2 — 2 — Investments in marketable common stock 5 5 — — Equity swap 205 205 — — Total assets $ 312 $ 210 $ 102 $ — Other current liabilities Foreign currency exchange derivatives $ 72 $ — $ 72 $ — Commodity derivatives 7 — 7 — Current portion of long-term debt Fixed rate debt swapped to floating 801 — 801 — Long-term debt Fixed rate debt swapped to floating 853 — 853 — Total liabilities $ 1,733 $ — $ 1,733 $ —

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Mar. 31, 2016
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Financial Information Related to Company's Reportable Segments	Financial information relating to the Company’s reportable segments is as follows (in millions): Net Sales Three Months Ended March 31, Six Months Ended March 31, 2016 2015 2016 2015 Building Efficiency Systems and Service North America $ 1,034 $ 959 $ 2,018 $ 1,916 Products North America 546 545 1,103 1,103 Asia 1,162 428 2,154 929 Rest of World 408 445 831 926 3,150 2,377 6,106 4,874 Automotive Experience Seating 4,177 4,141 8,263 8,276 Interiors 121 1,092 268 2,240 4,298 5,233 8,531 10,516 Power Solutions 1,583 1,588 3,323 3,432 Total net sales $ 9,031 $ 9,198 $ 17,960 $ 18,822 Segment Income (Loss) Three Months Ended Six Months Ended 2016 2015 2016 2015 Building Efficiency Systems and Service North America $ 88 $ 84 $ 181 $ 148 Products North America 27 49 44 93 Asia 102 26 164 75 Rest of World 4 7 (1 ) 7 221 166 388 323 Automotive Experience Seating 184 229 350 430 Interiors 33 21 45 54 217 250 395 484 Power Solutions 264 264 606 579 Total segment income $ 702 $ 680 $ 1,389 $ 1,386 Restructuring and impairment costs (229 ) — (229 ) — Net financing charges (74 ) (69 ) (142 ) (140 ) Income from continuing operations before income taxes $ 399 $ 611 $ 1,018 $ 1,246

Financial Statements - Carrying

Financial Statements - Carrying Amounts and Classification of Assets and Liabilities for Consolidated VIEs (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
Variable Interest Entity [Line Items]
Current assets	$ 11,058	$ 10,469	$ 11,721
Current liabilities	11,792	10,446	11,909
Noncurrent liabilities	8,288	8,398	8,067
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Current assets	308	281	269
Noncurrent assets	123	128	134
Total assets	431	409	403
Current liabilities	225	232	200
Noncurrent liabilities	32	34	35
Total liabilities	$ 257	$ 266	$ 235

Financial Statements - Addition

Financial Statements - Additional Information (Detail) $ in Millions	12 Months Ended
	Sep. 30, 2012InterestInvestmentEntity	Mar. 31, 2016USD ($)Entity	Sep. 30, 2015USD ($)Entity	Mar. 31, 2015USD ($)Entity
Financial Statement Details [Line Items]
Number of VIEs where Company is Primary Beneficiary		3	3	3
Interest percentage minimum for investments in partially-owned affiliates to be accounted for by the equity method		20.00%
Number of separate investments a pre-existing VIE was reorganized into	3
Additional interests acquired | InterestInvestment	2
Third party debt agreement | $		$ 154
Loans to partially-owned affiliates | $		61
Floor guarantee | $		25
Number of VIEs in which Company was not primary beneficiary	2
Variable Interest Entity, Not Primary Beneficiary [Member]
Financial Statement Details [Line Items]
Investment balance of the Company's nonconsolidated VIEs | $		$ 64	$ 62	$ 60
Automotive Experience
Financial Statement Details [Line Items]
Number of VIEs where Company is Primary Beneficiary		2
Power Solutions
Financial Statement Details [Line Items]
Number of VIEs where Company is Primary Beneficiary		1

Financial Statements New Accoun

Financial Statements New Accounting Pronouncements, Early Adoption (Details) - USD ($) $ in Millions	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other current assets	$ 1,774	$ 1,689	$ 1,790
Other noncurrent assets	2,390	2,773	3,091
Other current liabilities	3,602	3,275	2,807
Other noncurrent liabilities	$ 2,364	$ 1,886	1,834
Previous Accounting Guidance [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other current assets			2,262
Other noncurrent assets			2,709
Other current liabilities			2,870
Other noncurrent liabilities			1,861
Change in Accounting Estimate, Type [Domain]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other current assets			(472)
Other noncurrent assets			382
Other current liabilities			(63)
Other noncurrent liabilities			$ (27)

Acquisitions and Divestitures -

Acquisitions and Divestitures - Additional Information (Detail) $ in Millions	3 Months Ended			6 Months Ended			12 Months Ended
	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Mar. 31, 2015USD ($)	Mar. 31, 2016USD ($)	Sep. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2014USD ($)
Acquisitions And Discontinued Operations [Line Items]
Cash paid for business acquisition	$ 0		$ 9	$ 133		$ 22
Goodwill recorded in connection with business acquisitions				197	$ 13
Fair value adjustment of equity investment	4		0	4		0
Sales price of divestiture	$ 22		141	40		141
Reduction in goodwill related to business divestitures				$ 0	20
Global Workplace Solutions
Acquisitions And Discontinued Operations [Line Items]
Income from discontinued operations before income taxes			$ 227			$ 269
Individually Immaterial Acquisitions
Acquisitions And Discontinued Operations [Line Items]
Number of acquisitions				1		3
Purchase price, net of cash acquired				$ 3		$ 47
Cash paid for business acquisition				0		18
Goodwill recorded in connection with business acquisitions				4		9
Air Distribution Technologies, Inc.
Acquisitions And Discontinued Operations [Line Items]
Adjustment to purchase price of previous acquisition						4
Goodwill adjustment related to previous acquisition							$ 21
Building Efficiency Asia
Acquisitions And Discontinued Operations [Line Items]
Goodwill recorded in connection with business acquisitions				193	0
Reduction in goodwill related to business divestitures				0	0
Building Efficiency Asia | Hitachi Joint Venture [Member]
Acquisitions And Discontinued Operations [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		60.00%
Payments to Acquire Interest in Joint Venture		$ 133
Purchase Price of Joint Venture		563
Cash Acquired from Acquisition		$ 430
Goodwill recorded in connection with business acquisitions				193
Global Workplace Solutions | Brookfield Johnson Controls
Acquisitions And Discontinued Operations [Line Items]
Number Of Joint Ventures Divested			2
Reduction in goodwill related to business divestitures			$ 20
Proceeds from Divestiture of Interest in Joint Venture			141
Income from discontinued operations before income taxes			200			$ 200
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax			$ 127
Building Efficiency Rest of World [Member]
Acquisitions And Discontinued Operations [Line Items]
Goodwill recorded in connection with business acquisitions				4	0
Reduction in goodwill related to business divestitures				0	0
Building Efficiency Rest of World [Member] | Individually Immaterial Acquisitions
Acquisitions And Discontinued Operations [Line Items]
Fair value adjustment of equity investment				4
Power Solutions
Acquisitions And Discontinued Operations [Line Items]
Goodwill recorded in connection with business acquisitions				0	0
Reduction in goodwill related to business divestitures				0	0
Building Efficiency Products North America
Acquisitions And Discontinued Operations [Line Items]
Goodwill recorded in connection with business acquisitions				0	13
Reduction in goodwill related to business divestitures				$ 0	$ 14
Building Efficiency Products North America | Air Distribution Technologies, Inc.
Acquisitions And Discontinued Operations [Line Items]
Goodwill recorded in connection with business acquisitions								$ 837

Discontinued Operations Discont

Discontinued Operations Discontinued Operations - Additional Information (Details) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)	Sep. 30, 2015USD ($)
Discontinued Operations - Additional Information [Line Items]
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%	35.00%
Assets held for sale	$ 17	$ 1,969	$ 17	$ 1,969	$ 55
Disposal Group, Including Discontinued Operation, Liabilities, Current	$ 0	1,511	$ 0	1,511	42
Global Workplace Solutions
Discontinued Operations - Additional Information [Line Items]
Income from discontinued operations before income taxes		$ 227		269
Ongoing Strategic Relationship		10 years
Automotive Experience Interiors
Discontinued Operations - Additional Information [Line Items]
Assets held for sale					$ 55
Global Workplace Solutions | Brookfield Johnson Controls
Discontinued Operations - Additional Information [Line Items]
Income from discontinued operations before income taxes		$ 200		$ 200
Number Of Joint Ventures Divested		2

Discontinued Operations Disco50

Discontinued Operations Discontinued Operations by Disposal Group - Global Workplace Solutions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Discontinued Operations by Disposal Group - Global Workplace Solutions [Line Items]
Income from discontinued operations attributable to noncontrolling interests, net of tax	$ 0	$ 1	$ 0	$ 4
Income from discontinued operations	$ 0	77	$ 0	103
Global Workplace Solutions
Discontinued Operations by Disposal Group - Global Workplace Solutions [Line Items]
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount		67
Net sales		803		1,845
Income from discontinued operations before income taxes		227		269
Provision for income taxes on discontinued operations		149		162
Income from discontinued operations attributable to noncontrolling interests, net of tax		1		4
Income from discontinued operations		77		103
Global Workplace Solutions
Discontinued Operations by Disposal Group - Global Workplace Solutions [Line Items]
Transaction costs, divestiture related		(10)		(17)
Global Workplace Solutions | Brookfield Johnson Controls
Discontinued Operations by Disposal Group - Global Workplace Solutions [Line Items]
Income from discontinued operations before income taxes		$ 200		$ 200

Discontinued Operations Disco51

Discontinued Operations Discontinued Operations - Assets and Liabilities Held for Sale, Specific Transactions (Details) - USD ($) $ in Millions	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
Assets and Liabilities Held for Sale, Specific Transactions [Line Items]
Assets held for sale	$ 17	$ 55	$ 1,969
Accounts receivable - net			1,165
Inventories			225
Other current assets			255
Property, plant and equipment - net			609
Goodwill			237
Other intangible assets - net			21
Investments in partially-owned affiliates			58
Other noncurrent assets			92
Assets held for sale			2,662
Short-term debt			19
Accounts payable			1,058
Accrued compensation and benefits			113
Other current liabilities			321
Liabilities held for sale			1,511
Interiors
Assets and Liabilities Held for Sale, Specific Transactions [Line Items]
Accounts receivable - net			583
Inventories			219
Other current assets			175
Property, plant and equipment - net			583
Goodwill			21
Other intangible assets - net			3
Investments in partially-owned affiliates			58
Other noncurrent assets			36
Assets held for sale			1,678
Short-term debt			18
Accounts payable			633
Accrued compensation and benefits			42
Other current liabilities			165
Liabilities held for sale			858
Global Workplace Solutions
Assets and Liabilities Held for Sale, Specific Transactions [Line Items]
Accounts receivable - net			582
Inventories			6
Other current assets			80
Property, plant and equipment - net			26
Goodwill			216
Other intangible assets - net			18
Investments in partially-owned affiliates			0
Other noncurrent assets			56
Assets held for sale			984
Short-term debt			1
Accounts payable			425
Accrued compensation and benefits			71
Other current liabilities			156
Liabilities held for sale			$ 653
Corporate Segment
Assets and Liabilities Held for Sale, Specific Transactions [Line Items]
Assets held for sale	$ 17
Automotive Experience Interiors
Assets and Liabilities Held for Sale, Specific Transactions [Line Items]
Assets held for sale		55
Liabilities held for sale		$ 42

Percentage-of-Completion Cont52

Percentage-of-Completion Contracts (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
Disclosure Percentage Of Completion Contracts Additional Information [Abstract]
Costs and earnings in excess of billings related to contracts	$ 411	$ 453	$ 462
Billing in excess of costs and earnings on uncompleted contracts	$ 335	$ 340	$ 397

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 1,241	$ 1,084	$ 1,062
Work-in-process	439	369	391
Finished goods	1,242	924	961
Inventories	$ 2,922	$ 2,377	$ 2,414

Goodwill and Other Intangible54

Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2016	Sep. 30, 2015
Goodwill [Roll Forward]
Beginning Balance	$ 6,824	$ 6,788
Business Acquisitions	197	13
Business Divestitures	0	(20)
Currency Translation and Other	21	43
Ending Balance	7,042	6,824
Building Efficiency Systems and Service North America
Goodwill [Roll Forward]
Beginning Balance	978	982
Business Acquisitions	0	0
Business Divestitures	0	(2)
Currency Translation and Other	0	(2)
Ending Balance	978	978
Building Efficiency Products North America
Goodwill [Roll Forward]
Beginning Balance	1,701	1,697
Business Acquisitions	0	13
Business Divestitures	0	(14)
Currency Translation and Other	0	5
Ending Balance	1,701	1,701
Building Efficiency Asia
Goodwill [Roll Forward]
Beginning Balance	389	402
Business Acquisitions	193	0
Business Divestitures	0	0
Currency Translation and Other	(12)	(13)
Ending Balance	570	389
Building Efficiency Rest of World [Member]
Goodwill [Roll Forward]
Beginning Balance	310	296
Business Acquisitions	4	0
Business Divestitures	0	0
Currency Translation and Other	2	14
Ending Balance	316	310
Seating
Goodwill [Roll Forward]
Beginning Balance	2,364	2,327
Business Acquisitions	0	0
Business Divestitures	0	(4)
Currency Translation and Other	26	41
Ending Balance	2,390	2,364
Power Solutions
Goodwill [Roll Forward]
Beginning Balance	1,082	1,084
Business Acquisitions	0	0
Business Divestitures	0	0
Currency Translation and Other	5	(2)
Ending Balance	$ 1,087	$ 1,082

Goodwill and Other Intangible55

Goodwill and Other Intangible Assets - Goodwill Additional Information (Details) - USD ($) $ in Millions	Oct. 01, 2015	Mar. 31, 2015
Interiors
Goodwill [Line Items]
Accumulated goodwill impairment		$ 430
Building Efficiency Rest of World [Member]
Goodwill [Line Items]
Accumulated goodwill impairment		$ 47
Building Efficiency
Goodwill [Line Items]
Accumulated goodwill impairment	$ 0

Goodwill and Other Intangible56

Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
Intangible Assets [Line Items]
Gross carrying amount, total intangible assets	$ 1,986	$ 1,904	$ 1,903
Net, Total Intangible Assets	1,576	1,516	1,558
Finite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	1,443	1,362	1,360
Accumulated Amortization	(410)	(388)	(345)
Net, Total Amortized Intangible Assets	1,033	974	1,015
Patented Technology
Finite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	47	80	82
Accumulated Amortization	(28)	(59)	(58)
Net, Total Amortized Intangible Assets	19	21	24
Customer Relationships
Finite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	1,013	975	982
Accumulated Amortization	(238)	(206)	(180)
Net, Total Amortized Intangible Assets	775	769	802
Miscellaneous
Finite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	383	307	296
Accumulated Amortization	(144)	(123)	(107)
Net, Total Amortized Intangible Assets	239	184	189
Trademarks
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying Amount, Gross and Net	$ 543	$ 542	$ 543

Goodwill and Other Intangible57

Goodwill and Other Intangible Assets - Other Intangible Assets Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 24	$ 22	$ 48	$ 46
Future amortization expense, 2017	101		101
Future amortization expense, 2018	99		99
Future amortization expense, 2019	84		84
Future amortization expense, 2020	75		75
Future amortization expense, 2021	$ 64		$ 64

Product Warranties - Additional

Product Warranties - Additional Information (Detail)	6 Months Ended
	Mar. 31, 2016
Product Warranties Disclosures [Abstract]
Maximum length, in years, of a product warranty for it to be recorded in other current liabilities	1 year
Minimum length, in years, of a product warranty for it to be recorded in other noncurrent liabilities	1 year

Product Warranties - Changes in

Product Warranties - Changes in Carrying Amount of Product Warranty liability (Detail) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 300	$ 319
Accruals for warranties issued during the period	157	136
Accruals from acquisition and divestitures	37	0
Accruals related to pre-existing warranties (including changes in estimates)	8	(2)
Settlements made (in cash or in kind) during the period	(152)	(144)
Currency translation	2	(7)
Balance at end of period	$ 352	$ 302

Significant Restructuring Cos60

Significant Restructuring Costs Change in Restructuring Reserve - 2016 Restructuring Plan (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 229	$ 0	$ 229	$ 0
2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	229
Payments for Restructuring			(4)
Restructuring Reserve, Settled without Cash			(27)
Restructuring Reserve	198		198
2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					$ 397
Payments for Restructuring			(60)		0
Restructuring Reserve, Settled without Cash			(2)		(183)
Restructuring Reserve	156		156		214
Employee Severance | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	194
Payments for Restructuring			(3)
Restructuring Reserve, Settled without Cash			0
Restructuring Reserve	191		191
Employee Severance | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					191
Payments for Restructuring			(37)		0
Restructuring Reserve, Settled without Cash			0		0
Restructuring Reserve	154		154		191
Fixed Asset Impairment | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	29
Payments for Restructuring			0
Restructuring Reserve, Settled without Cash			(29)
Restructuring Reserve	0		0
Fixed Asset Impairment | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					183
Payments for Restructuring			0		0
Restructuring Reserve, Settled without Cash			0		(183)
Restructuring Reserve	0		0		0
Other Restructuring | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	6
Payments for Restructuring			(1)
Restructuring Reserve, Settled without Cash			0
Restructuring Reserve	5		5
Other Restructuring | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					23
Payments for Restructuring			(23)		0
Restructuring Reserve, Settled without Cash			0		0
Restructuring Reserve	0		0		23
Currency Translation | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0
Payments for Restructuring			0
Restructuring Reserve, Settled without Cash			(2)
Restructuring Reserve	2		2
Currency Translation | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					0
Payments for Restructuring			0		0
Restructuring Reserve, Settled without Cash			(2)		0
Restructuring Reserve	$ 2		2		0
Continuing Operations | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			229
Continuing Operations | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					397
Continuing Operations | Building Efficiency Systems and Service North America | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			2
Continuing Operations | Building Efficiency Systems and Service North America | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					3
Continuing Operations | Automotive Experience Seating [Member] | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			169
Continuing Operations | Automotive Experience Seating [Member] | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					182
Continuing Operations | Building Efficiency Asia | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			26
Continuing Operations | Building Efficiency Asia | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					11
Continuing Operations | Building Efficiency Rest of World [Member] | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			16
Continuing Operations | Building Efficiency Rest of World [Member] | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					13
Continuing Operations | Building Efficiency Products North America | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			9
Continuing Operations | Building Efficiency Products North America | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					11
Continuing Operations | Corporate Segment | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			$ 7
Continuing Operations | Corporate Segment | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					$ 166

Significant Restructuring Cos61

Significant Restructuring Costs Changes in Restructuring Reserve - 2015 Restructuring Plan (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges	$ 229	$ 0	$ 229	$ 0
2015 Restructuring Plan [Domain]
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges					$ 397
Payments for Restructuring			60		0
Restructuring Reserve, Settled without Cash			(2)		(183)
Restructuring Reserve	156		156		214
2015 Restructuring Plan [Domain] | Employee Severance
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges					191
Payments for Restructuring			37		0
Restructuring Reserve, Settled without Cash			0		0
Restructuring Reserve	154		154		191
2015 Restructuring Plan [Domain] | Fixed Asset Impairment
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges					183
Payments for Restructuring			0		0
Restructuring Reserve, Settled without Cash			0		(183)
Restructuring Reserve	0		0		0
2015 Restructuring Plan [Domain] | Other Restructuring
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges					23
Payments for Restructuring			23		0
Restructuring Reserve, Settled without Cash			0		0
Restructuring Reserve	0		0		23
2015 Restructuring Plan [Domain] | Currency Translation
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges					0
Payments for Restructuring			0		0
Restructuring Reserve, Settled without Cash			(2)		0
Restructuring Reserve	$ 2		$ 2		0
Continuing Operations | 2015 Restructuring Plan [Domain]
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges					397
Automotive Experience Seating [Member] | Continuing Operations | 2015 Restructuring Plan [Domain]
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges					182
Corporate Segment | Continuing Operations | 2015 Restructuring Plan [Domain]
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges					166
Building Efficiency Rest of World [Member] | Continuing Operations | 2015 Restructuring Plan [Domain]
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges					13
Power Solutions | Continuing Operations | 2015 Restructuring Plan [Domain]
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges					11
Building Efficiency Asia | Continuing Operations | 2015 Restructuring Plan [Domain]
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges					11
Building Efficiency Systems and Service North America | Continuing Operations | 2015 Restructuring Plan [Domain]
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges					3
Building Efficiency Products North America | Continuing Operations | 2015 Restructuring Plan [Domain]
Changes in Restructuring Reserve - 2015 Restructuring Plan [Line Items]
Restructuring Charges					$ 11

Significant Restructuring Cos62

Significant Restructuring Costs Changes in Restructuring Reserve - 2014 Restructuring Plan (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015	Sep. 30, 2014
Changes in Restructuring Reserve - 2014 Restructuring Plan [Line Items]
Restructuring and impairment costs	$ 229	$ 0	$ 229	$ 0
2014 Restructuring Plan
Changes in Restructuring Reserve - 2014 Restructuring Plan [Line Items]
Restructuring and impairment costs						$ 377
Restructuring Reserve, Beginning Balance			(99)	(182)	$ (182)
Payments for Restructuring			(31)		(70)	(8)
Restructuring Reserve, Settled without Cash			(2)		(13)	(187)
Restructuring Reserve, Ending Balance	(66)		(66)		(99)	(182)
2014 Restructuring Plan | Employee Severance
Changes in Restructuring Reserve - 2014 Restructuring Plan [Line Items]
Restructuring and impairment costs						191
Restructuring Reserve, Beginning Balance			(118)	(183)	(183)
Payments for Restructuring			(31)		(65)	(8)
Restructuring Reserve, Settled without Cash			0		0	0
Restructuring Reserve, Ending Balance	(87)		(87)		(118)	(183)
2014 Restructuring Plan | Fixed Asset Impairment
Changes in Restructuring Reserve - 2014 Restructuring Plan [Line Items]
Restructuring and impairment costs						134
Restructuring Reserve, Beginning Balance			0	0	0
Payments for Restructuring			0		0	0
Restructuring Reserve, Settled without Cash			0		0	(134)
Restructuring Reserve, Ending Balance	0		0		0	0
2014 Restructuring Plan | Goodwill Impairment
Changes in Restructuring Reserve - 2014 Restructuring Plan [Line Items]
Restructuring and impairment costs						47
Restructuring Reserve, Beginning Balance			0	0	0
Payments for Restructuring			0		0	0
Restructuring Reserve, Settled without Cash			0		0	(47)
Restructuring Reserve, Ending Balance	0		0		0	0
2014 Restructuring Plan | Other Restructuring
Changes in Restructuring Reserve - 2014 Restructuring Plan [Line Items]
Restructuring and impairment costs						5
Restructuring Reserve, Beginning Balance			0	(5)	(5)
Payments for Restructuring			0		(5)	0
Restructuring Reserve, Settled without Cash			0		0	0
Restructuring Reserve, Ending Balance	0		0		0	(5)
2014 Restructuring Plan | Currency Translation
Changes in Restructuring Reserve - 2014 Restructuring Plan [Line Items]
Restructuring and impairment costs						0
Restructuring Reserve, Beginning Balance			(19)	$ (6)	(6)
Payments for Restructuring			0		0	0
Restructuring Reserve, Settled without Cash			(2)		(13)	(6)
Restructuring Reserve, Ending Balance	$ (21)		$ (21)		$ (19)	(6)
Continuing Operations | 2014 Restructuring Plan
Changes in Restructuring Reserve - 2014 Restructuring Plan [Line Items]
Restructuring and impairment costs						324
Building Efficiency Systems and Service North America | Continuing Operations | 2014 Restructuring Plan
Changes in Restructuring Reserve - 2014 Restructuring Plan [Line Items]
Restructuring and impairment costs						$ 12

Significant Restructuring Cos63

Significant Restructuring Costs Changes to Restructuring Reserve - 2013 Restructuring Plan (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve	$ (229)	$ 0	$ (229)	$ 0
2013 Restructuring Plan
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve							$ (985)
Restructuring Reserve, Beginning Balance			(68)	(191)	$ (191)	$ (342)
Payments for Restructuring			(33)		(113)	(147)	(26)
Restructuring Reserve, Settled without Cash			(1)		(10)	(11)	(586)
Restructuring Reserve, Ending Balance	(34)		(34)		(68)	(191)	(342)
2013 Restructuring Plan | Employee Severance
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve							(392)
Restructuring Reserve, Beginning Balance			(85)	(198)	(198)	(335)
Payments for Restructuring			(33)		(113)	(144)	(26)
Restructuring Reserve, Settled without Cash			0		0	0	0
Restructuring Reserve, Ending Balance	(52)		(52)		(85)	(198)	(335)
2013 Restructuring Plan | Fixed Asset Impairment
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve							(156)
Restructuring Reserve, Beginning Balance			0	0	0	0
Payments for Restructuring			0		0	0	0
Restructuring Reserve, Settled without Cash			0		0	0	(156)
Restructuring Reserve, Ending Balance	0		0		0	0	0
2013 Restructuring Plan | Goodwill Impairment
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve							(430)
Restructuring Reserve, Beginning Balance			0	0	0	0
Payments for Restructuring			0		0	0	0
Restructuring Reserve, Settled without Cash			0		0	0	(430)
Restructuring Reserve, Ending Balance	0		0		0	0	0
2013 Restructuring Plan | Other Restructuring
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve							(7)
Restructuring Reserve, Beginning Balance			0	0	0	(3)
Payments for Restructuring			0		0	(3)	0
Restructuring Reserve, Settled without Cash			0		0	0	(4)
Restructuring Reserve, Ending Balance	0		0		0	0	(3)
2013 Restructuring Plan | Currency Translation
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve							0
Restructuring Reserve, Beginning Balance			(17)	$ (7)	(7)	(4)
Payments for Restructuring			0		0	0	0
Restructuring Reserve, Settled without Cash			(1)		(10)	(11)	(4)
Restructuring Reserve, Ending Balance	$ (18)		$ (18)		$ (17)	(7)	(4)
Transfer To Held for Sale [Member] | 2013 Restructuring Plan
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve						(24)	(31)
Transfer To Held for Sale [Member] | 2013 Restructuring Plan | Employee Severance
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve						(24)	(31)
Transfer To Held for Sale [Member] | 2013 Restructuring Plan | Fixed Asset Impairment
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve						0	0
Transfer To Held for Sale [Member] | 2013 Restructuring Plan | Goodwill Impairment
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve						0	0
Transfer To Held for Sale [Member] | 2013 Restructuring Plan | Other Restructuring
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve						0	0
Transfer To Held for Sale [Member] | 2013 Restructuring Plan | Currency Translation
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve						0	0
Continuing Operations | 2013 Restructuring Plan
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve							(903)
Continuing Operations | Building Efficiency Products North America | 2013 Restructuring Plan
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve							(28)
Continuing Operations | Building Efficiency Systems and Service North America | 2013 Restructuring Plan
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Original Reserve							$ (35)
Transfer From Held for Sale [Member] | 2013 Restructuring Plan
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Restructuring Reserve, Accrual Adjustment						31
Transfer From Held for Sale [Member] | 2013 Restructuring Plan | Employee Severance
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Restructuring Reserve, Accrual Adjustment						31
Transfer From Held for Sale [Member] | 2013 Restructuring Plan | Fixed Asset Impairment
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Restructuring Reserve, Accrual Adjustment						0
Transfer From Held for Sale [Member] | 2013 Restructuring Plan | Goodwill Impairment
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Restructuring Reserve, Accrual Adjustment						0
Transfer From Held for Sale [Member] | 2013 Restructuring Plan | Other Restructuring
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Restructuring Reserve, Accrual Adjustment						0
Transfer From Held for Sale [Member] | 2013 Restructuring Plan | Currency Translation
Changes to Restructuring Reserve - 2013 Restructuring Plan [Line Items]
Restructuring Reserve, Accrual Adjustment						$ 0

Significant Restructuring Cos64

Significant Restructuring Costs - Additional Information (Detail) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended			42 Months Ended
	Mar. 31, 2016USD ($)EmployeesPlant	Mar. 31, 2015USD ($)	Mar. 31, 2016USD ($)EmployeesPlant	Mar. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2014USD ($)	Sep. 30, 2013USD ($)	Mar. 31, 2016USD ($)EmployeesPlant
Restructuring Cost and Reserve [Line Items]
Original Reserve	$ (229)	$ 0	$ (229)	$ 0
Number of employees to be severed | Employees								17,100
Number of employees severed | Employees	10,400		10,400					10,400
Number of plants to be closed | Plant								26
Plants closed | Plant	10		10					10
Corporate Segment
Restructuring Cost and Reserve [Line Items]
Number of employees to be severed | Employees								100
Automotive Experience
Restructuring Cost and Reserve [Line Items]
Number of employees to be severed | Employees								10,000
Number of plants to be closed | Plant								18
Power Solutions
Restructuring Cost and Reserve [Line Items]
Number of employees to be severed | Employees								900
Building Efficiency
Restructuring Cost and Reserve [Line Items]
Number of employees to be severed | Employees								6,100
Number of plants to be closed | Plant								8
2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			$ (60)		$ 0
Original Reserve					(397)
Restructuring Reserve, Settled without Cash			2		183
Restructuring Reserve	$ 156		156		214			$ 156
2015 Restructuring Plan [Domain] | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve					(397)
2014 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			(31)		(70)	$ (8)
Original Reserve						(377)
Restructuring Reserve, Settled without Cash			2		13	187
Restructuring Reserve	66		66		99	182		66
2014 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve						(324)
2014 Restructuring Plan | Automotive Experience Electronics | Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve						(53)
2013 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			(33)		(113)	(147)	$ (26)
Original Reserve							(985)
Restructuring Reserve, Settled without Cash			1		10	11	586
Restructuring Reserve	34		34		68	191	342	34
2013 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve							(903)
2013 Restructuring Plan | Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve							(82)
2013 Restructuring Plan | Global Workplace Solutions | Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve							(54)
2013 Restructuring Plan | Automotive Experience Electronics | Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve							(28)
Building Efficiency Systems and Service North America | 2015 Restructuring Plan [Domain] | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve					(3)
Building Efficiency Systems and Service North America | 2014 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve						(12)
Building Efficiency Systems and Service North America | 2013 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve							(35)
Building Efficiency Products North America | 2015 Restructuring Plan [Domain] | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve					(11)
Building Efficiency Products North America | 2014 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve						(7)
Building Efficiency Products North America | 2013 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve							(28)
Automotive Experience Interiors | 2014 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve						(130)
Automotive Experience Interiors | 2013 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve							(560)
Automotive Experience Seating [Member] | 2015 Restructuring Plan [Domain] | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve					(182)
Automotive Experience Seating [Member] | 2014 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve						(29)
Automotive Experience Seating [Member] | 2013 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve							(152)
Building Efficiency Rest of World [Member] | 2015 Restructuring Plan [Domain] | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve					(13)
Building Efficiency Rest of World [Member] | 2014 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve						(119)
Building Efficiency Rest of World [Member] | 2013 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve							(70)
Power Solutions | 2015 Restructuring Plan [Domain] | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve					(11)
Power Solutions | 2014 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve						(16)
Power Solutions | 2013 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve							(36)
Corporate Segment | 2015 Restructuring Plan [Domain] | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve					(166)
Corporate Segment | 2014 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve						(7)
Corporate Segment | 2013 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve							(17)
Building Efficiency Asia | 2015 Restructuring Plan [Domain] | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve					(11)
Building Efficiency Asia | 2014 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve						(4)
Building Efficiency Asia | 2013 Restructuring Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Original Reserve							(5)
Employee Severance | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			(37)		0
Original Reserve					(191)
Restructuring Reserve, Settled without Cash			0		0
Restructuring Reserve	154		154		191			154
Employee Severance | 2014 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			(31)		(65)	(8)
Original Reserve						(191)
Restructuring Reserve, Settled without Cash			0		0	0
Restructuring Reserve	87		87		118	183		87
Employee Severance | 2013 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			(33)		(113)	(144)	(26)
Original Reserve							(392)
Restructuring Reserve, Settled without Cash			0		0	0	0
Restructuring Reserve	52		52		85	198	335	52
Fixed Asset Impairment | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			0		0
Original Reserve					(183)
Restructuring Reserve, Settled without Cash			0		183
Restructuring Reserve	0		0		0			0
Fixed Asset Impairment | 2014 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			0		0	0
Original Reserve						(134)
Restructuring Reserve, Settled without Cash			0		0	134
Restructuring Reserve	0		0		0	0		0
Fixed Asset Impairment | 2013 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			0		0	0	0
Original Reserve							(156)
Restructuring Reserve, Settled without Cash			0		0	0	156
Restructuring Reserve	0		0		0	0	0	0
Other Restructuring | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			(23)		0
Original Reserve					(23)
Restructuring Reserve, Settled without Cash			0		0
Restructuring Reserve	0		0		23			0
Other Restructuring | 2014 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			0		(5)	0
Original Reserve						(5)
Restructuring Reserve, Settled without Cash			0		0	0
Restructuring Reserve	0		0		0	5		0
Other Restructuring | 2013 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			0		0	(3)	0
Original Reserve							(7)
Restructuring Reserve, Settled without Cash			0		0	0	4
Restructuring Reserve	0		0		0	0	3	0
Currency Translation | 2015 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			0		0
Original Reserve					0
Restructuring Reserve, Settled without Cash			2		0
Restructuring Reserve	2		2		0			2
Currency Translation | 2014 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			0		0	0
Original Reserve						0
Restructuring Reserve, Settled without Cash			2		13	6
Restructuring Reserve	21		21		19	6		21
Currency Translation | 2013 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			0		0	0	0
Original Reserve							0
Restructuring Reserve, Settled without Cash			1		10	11	4
Restructuring Reserve	$ 18		$ 18		$ 17	$ 7	$ 4	$ 18

Income Taxes - Tax Jurisdiction

Income Taxes - Tax Jurisdictions and Years Currently under Audit Exam (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)
Income Tax Examination [Line Items]
Estimated benefit to tax expense	$ 50
Belgium | Earliest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,010
Belgium | Latest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,012
Canada | Earliest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,008
Canada | Latest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,013
France | Earliest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,002
France | Latest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,013
Germany | Earliest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,007
Germany | Latest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,012
Korea | Earliest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,008
Korea | Latest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,014
Mexico | Earliest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,011
SPAIN | Earliest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,013
United Kingdom | Earliest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,011
United Kingdom | Latest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,013
United States | Earliest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,013
United States | Latest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,014
Examination Period One | Brazil | Earliest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,004
Examination Period One | Brazil | Latest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,008
Examination Period One | Italy
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,006
Examination Period Two | Brazil | Earliest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,011
Examination Period Two | Brazil | Latest tax year under exam
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,012
Examination Period Two | Italy
Income Tax Examination [Line Items]
Tax years currently under audit exam	2,011

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015
Income Taxes, Additional Information [Line Items]
Effective income tax rate	218.00%	22.00%	98.00%	20.00%
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%	35.00%
Gross tax effected unrecognized tax benefits					$ 1,235
Amount of unrecognized tax benefits which may impact effective tax rate					1,180
Total net accrued interest, net of tax benefit					$ 41
Number of months for conclusion of tax exam, appeal or litigation	12 months
Estimated benefit to tax expense	$ 50
Restructuring Charges	229	$ 0	$ 229	$ 0
JAPAN
Income Taxes, Additional Information [Line Items]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount				$ 17
2016 Restructuring Plan [Domain]
Income Taxes, Additional Information [Line Items]
Restructuring Charges	229
Restructuring Charges [Member]
Income Taxes, Additional Information [Line Items]
Unusual or Infrequent, Tax Effect	17
Automotive Experience
Income Taxes, Additional Information [Line Items]
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	$ 780

Pension and Postretirement Pl67

Pension and Postretirement Plans - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
United States Pension Plan of US Entity
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4	$ 7	$ 8	$ 15
Interest cost	25	31	50	61
Expected return on plan assets	(46)	(45)	(93)	(90)
Net periodic benefit cost (credit)	(17)	(7)	(35)	(14)
Foreign Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	6	9	13
Interest cost	10	12	20	24
Expected return on plan assets	(13)	(13)	(26)	(26)
Net periodic benefit cost (credit)	1	5	3	11
Other Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	1	1
Interest cost	2	3	3	5
Expected return on plan assets	(2)	(3)	(5)	(6)
Amortization of prior service credit	(1)	(1)	(1)	(1)
Net periodic benefit cost (credit)	$ (1)	$ (1)	$ (2)	$ (1)

Debt and Financing Arrangemen68

Debt and Financing Arrangements - Additional Information (Detail) € in Millions, $ in Millions	3 Months Ended						12 Months Ended
	Mar. 31, 2016USD ($)	Mar. 31, 2016EUR (€)	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Sep. 30, 2015USD ($)	Mar. 31, 2016EUR (€)
7.7% due 2015
Debt Instrument [Line Items]
Extinguishment of Debt, Amount					$ 125
Debt Instrument, Interest Rate, Stated Percentage					7.70%
150 million USD floating rate term loan maturing in September 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Term					7 months
Short-term Bank Loans and Notes Payable					$ 150
Extinguishment of Debt, Amount				$ 150
$35M revolving credit facility
Debt Instrument [Line Items]
Credit facility, expired			$ 35
Credit facility			35
Credit facility, amount drawn			0
$100M revolving credit facility
Debt Instrument [Line Items]
Credit facility, expired			100
Credit facility	$ 100		100
Credit facility, amount drawn			0
Length of Credit Facility	9 months	9 months
37 Million Euro Revolving Credit Facility [Domain]
Debt Instrument [Line Items]
Credit facility, expired | €		€ 37
100 Million Euro Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility | €								€ 100
Length of Credit Facility	9 months	9 months
200 Million USD floating rate term loan maturing in October 2016 [Domain]
Debt Instrument [Line Items]
Length of Credit Facility	10 months	10 months
100 million USD Floating Rate Term Loan Maturing in October 2016 [Domain]
Debt Instrument [Line Items]
Credit facility	$ 200
125 Million USD floating rate term loan maturing in October 2016 [Domain]
Debt Instrument [Line Items]
Credit facility	$ 125
Length of Credit Facility	10 months	10 months
$500M floating rate term loan, maturing Sep 2015
Debt Instrument [Line Items]
Debt Instrument, Term						9 months
Short-term Bank Loans and Notes Payable						$ 500
Extinguishment of Debt, Amount				500
$100M floating rate term loan, maturing Sep 2015
Debt Instrument [Line Items]
Debt Instrument, Term						9 months
Short-term Bank Loans and Notes Payable						$ 100
Extinguishment of Debt, Amount				$ 100
$125 Million USD floating rate term loan maturing in September 2016 [Domain]
Debt Instrument [Line Items]
Credit facility			$ 125
Length of Credit Facility			9 months
$200 Million USD floating rate term loan maturing in September 2016 [Domain]
Debt Instrument [Line Items]
Credit facility			$ 200
Length of Credit Facility			9 months
90 million USD revolving credit facility [Member]
Debt Instrument [Line Items]
Credit facility	$ 90				$ 90
Debt Instrument, Term					1 year
Credit facility, amount drawn	$ 90
Extinguishment of Debt, Amount							$ 90
Length of Credit Facility	1 year	1 year
5.5% due 2016
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	$ 800
Debt Instrument, Interest Rate, Stated Percentage	5.50%	5.50%
Contingent on consumation of Tyco merger [Domain] | 2.0 billion USD revolving credit facility [Member] [Domain]
Debt Instrument [Line Items]
Credit facility	$ 2,000

Debt and Financing Arrangemen69

Debt and Financing Arrangements - Components of Net Financing Charges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Debt Disclosure [Abstract]
Interest expense, net of capitalized interest costs	$ 69	$ 72	$ 142	$ 143
Banking fees and bond cost amortization	5	6	13	12
Interest income	(3)	(1)	(5)	(4)
Net foreign exchange results for financing activities	3	(8)	(8)	(11)
Net financing charges	$ 74	$ 69	$ 142	$ 140

Earnings Per Share - Earnings P

Earnings Per Share - Earnings Per Share (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Income (loss) from continuing operations	$ (530)	$ 452	$ (80)	$ 933
Income from discontinued operations	0	77	0	103
Basic and diluted income (loss) available to common shareholders	$ 530	$ (529)	$ 80	$ (1,036)
Weighted Average Shares Outstanding
Basic weighted average shares outstanding	648.2	654.4	648	657.9
Effect of dilutive securities:
Stock options and unvested restricted stock	0	6.8	0	6.8
Diluted weighted average shares outstanding	648.2	661.2	648	664.7
Antidilutive Securities
Options to purchase common shares	0	0.5	0	0.4

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Mar. 31, 2016$ / shares	Mar. 31, 2015$ / shares	Mar. 31, 2016Quarter$ / shares	Mar. 31, 2015Quarter$ / shares
Earnings Per Share [Abstract]
Number of potential dilutive shares due to stock options, unvested restricted stock and unvested performance share awards	3.9		4.5
Dividend declared | $ / shares	$ 0.29	$ 0.26	$ 0.58	$ 0.52
Number of quarterly dividends declared | Quarter			2	2

Equity and Noncontrolling Int72

Equity and Noncontrolling Interests - Equity Attributable to Johnson Controls, Inc. and Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			$ 10,376
Beginning balance			163
Beginning balance			10,539
Net income (loss) attributable to Johnson Controls, Inc.	$ (530)	$ 529	(80)	$ 1,036
Foreign currency translation adjustments	203	(504)	26	(855)
Realized and unrealized gains (losses) on derivatives	5	7	2	(3)
Pension and postretirement plans	0	0	0	(3)
Other comprehensive income (loss)	208	(497)	28	(861)
Comprehensive income (loss) attributable to Johnson Controls, Inc.	(351)	54	(62)	197
Comprehensive income attributable to noncontrolling interests	90	6	111	45
Total comprehensive income (loss)	(261)	60	49	242
Ending balance	9,984	10,583	9,984	10,583
Ending balance	898	199	898	199
Ending balance	10,882	10,782	10,882	10,782
Equity Attributable to Johnson Controls, Inc
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	10,506	10,823	10,376	11,311
Net income (loss) attributable to Johnson Controls, Inc.	(530)	529	(80)	1,036
Foreign currency translation adjustments	175	(481)	15	(832)
Realized and unrealized gains (losses) on derivatives	4	6	3	(4)
Pension and postretirement plans			0	(3)
Other comprehensive income (loss)	179	(475)	18	(839)
Comprehensive income (loss) attributable to Johnson Controls, Inc.	(351)	54	(62)	197
Cash dividends - common stock	(189)	(170)	(377)	(342)
Dividends attributable to noncontrolling interests	0	0	0	0
Repurchases of common stock	0	(210)	0	(810)
Change In Noncontrolling Interest Share	0	0	0	0
Other, including options exercised	18	86	47	227
Ending balance	9,984	10,583	9,984	10,583
Nonredeemable Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change In Noncontrolling Interest Share	73	69	691	69
Total Equity Excluding Redeemable Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change In Noncontrolling Interest Share	73	69	691	69
Equity Attributable to Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	931	263	163	251
Income attributable to noncontrolling interests	50	16	70	36
Foreign currency translation adjustments	18	(3)	9	(3)
Realized and unrealized gains (losses) on derivatives	1	0	1	0
Pension and postretirement plans			0	0
Other comprehensive income (loss)	19	(3)	10	(3)
Comprehensive income attributable to noncontrolling interests	69	13	80	33
Cash dividends - common stock	0	0	0	0
Dividends attributable to noncontrolling interests	(29)	(8)	(36)	(16)
Repurchases of common stock	0	0	0	0
Other, including options exercised	0	0	0	0
Ending balance	898	199	898	199
Total Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	11,437	11,086	10,539	11,562
Net income	(480)	545	(10)	1,072
Foreign currency translation adjustments	193	(484)	24	(835)
Realized and unrealized gains (losses) on derivatives	5	6	4	(4)
Pension and postretirement plans			0	(3)
Other comprehensive income (loss)	198	(478)	28	(842)
Total comprehensive income (loss)	(282)	67	18	230
Cash dividends - common stock	(189)	(170)	(377)	(342)
Dividends attributable to noncontrolling interests	(29)	(8)	(36)	(16)
Repurchases of common stock	0	(210)	0	(810)
Other, including options exercised	18	86	47	227
Ending balance	$ 10,882	$ 10,782	$ 10,882	$ 10,782

Equity and Noncontrolling Int73

Equity and Noncontrolling Interests Equity and Noncontrolling Interests - Additional Information (Details) $ in Millions	Dec. 31, 2013USD ($)
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	$ 3,650
Authorization in November 2013
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	$ 3,000

Equity and Noncontrolling Int74

Equity and Noncontrolling Interests - Changes in Redeemable Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Stockholders' Equity Attributable to Redeemable Noncontrolling Interest [Roll Forward]
Beginning balance			$ 212
Ending balance	$ 237	$ 202	237	$ 202
Redeemable Noncontrolling Interests [Member]
Stockholders' Equity Attributable to Redeemable Noncontrolling Interest [Roll Forward]
Beginning balance	216	209	212	194
Net income	11	12	31	31
Foreign currency translation adjustments	10	(20)	2	(20)
Realized and unrealized gains (losses) on derivatives	0	1	(2)	1
Dividends			(6)	(4)
Ending balance	$ 237	$ 202	$ 237	$ 202

Equity and Noncontrolling Int75

Equity and Noncontrolling Interests - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Mar. 31, 2016		Mar. 31, 2015		Mar. 31, 2016	Mar. 31, 2015		Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, end of period		$ (1,039)		$ (1,076)		$ (1,039)	$ (1,076)		$ (1,057)
Realized and unrealized gains (losses) on derivatives
Current period changes in fair value		5		7		2	(3)
Foreign Currency Translation Adjustments
Foreign currency translation adjustments
Balance at beginning of period		(1,207)		(599)		(1,047)	(248)
Aggregate adjustment for the period		175		(481)		15	(832)
Balance at end of period		(1,032)		(1,080)		(1,032)	(1,080)
Aggregate adjustment for period, tax		5		(4)		1	(2)
Realized and Unrealized Gains (Losses) on Derivatives
Realized and unrealized gains (losses) on derivatives
Balance at beginning of period		(8)		(6)		(7)	4
Current period changes in fair value		5		4		1	(5)
Reclassification to income		(1)		2		2	1
Balance at end of period		(4)		0		(4)	0
Current period changes in fair value, derivatives, tax		1		1		1	(4)
Reclassification to income, derivatives, tax		0	[1]	1	[1]	1	1	[1]
Pension And Postretirement Plans
Pension and postretirement plans
Balance at beginning of period		(3)		4		(3)	7
Reclassification to income		(1)		(1)		(1)	(4)
Pension and postretirement plans		(1)		(1)		(1)	(1)
Balance at end of period		(3)		4		(3)	4
Reclassification to income, pension and postretirement, tax	[2]	0		0		0	(1)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Parent		$ 0		$ 0		$ 0	$ 0
[1]	Refer to Note 15, "Derivative Instruments and Hedging Activities," of the notes to consolidated financial statements for disclosure of the line items on the consolidated statements of income affected by reclassifications from AOCI into income related to derivatives
[2]	Refer to Note 11, "Pension and Postretirement Plans," of the notes to consolidated financial statements for disclosure of the components of the Company's net periodic benefit costs associated with its defined benefit pension and postretirement plans. For the three and six months ended March 31, 2016, the amounts reclassified from AOCI into income for pension and postretirement plans were primarily recorded in selling, general and administrative expenses on the consolidated statements of income. For the three and six months ended March 31, 2015, the amounts reclassified from AOCI into income for pension and postretirement plans were primarily recorded in selling, general and administrative expenses and income from discontinued operations, net of tax on the consolidated statements of income.

Derivative Instruments and He76

Derivative Instruments and Hedging Activities - Outstanding commodity hedge contracts (Detail)	Mar. 31, 2016Tlb	Sep. 30, 2015Tlb	Mar. 31, 2015Tlb
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Pounds of Copper | lb	7,155,000	14,648,000	7,805,000
Metric Tons of Lead	4,595	6,785	10,952
Metric Tons of Aluminum	2,785	5,700	1,830
Metric Tons of Tin	688	2,080	1,000

Derivative Instruments and He77

Derivative Instruments and Hedging Activities - Location and Fair Values of Derivative Instruments and Hedging Activities (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
Derivative Instruments [Line Items]
Derivative assets	$ 172	$ 233	$ 307
Derivative liabilities	1,252	1,727	1,733
Designated as Hedging Instrument
Derivative Instruments [Line Items]
Derivative assets	25	42	74
Derivative liabilities	1,222	1,701	1,711
Designated as Hedging Instrument | Other Current Assets | Foreign Currency Exchange Derivatives
Derivative Instruments [Line Items]
Derivative assets	21	31	50
Designated as Hedging Instrument | Other Current Assets | Commodity Derivatives
Derivative Instruments [Line Items]
Derivative assets	1	0	0
Designated as Hedging Instrument | Other Current Assets | Interest Rate Swaps
Derivative Instruments [Line Items]
Derivative assets	0	1	2
Designated as Hedging Instrument | Other Current Assets | Cross-Currency Interest Rate Swaps
Derivative Instruments [Line Items]
Derivative assets	0	5	20
Designated as Hedging Instrument | Other Noncurrent Assets | Interest Rate Swaps
Derivative Instruments [Line Items]
Derivative assets	3	5	2
Designated as Hedging Instrument | Other Noncurrent Assets | Equity swap
Derivative Instruments [Line Items]
Derivative assets	0	0	0
Designated as Hedging Instrument | Other Current Liabilities | Foreign Currency Exchange Derivatives
Derivative Instruments [Line Items]
Derivative liabilities	30	37	50
Designated as Hedging Instrument | Other Current Liabilities | Commodity Derivatives
Derivative Instruments [Line Items]
Derivative liabilities	3	7	7
Designated as Hedging Instrument | Other Current Liabilities | Cross-Currency Interest Rate Swaps
Derivative Instruments [Line Items]
Derivative liabilities	7	1	0
Designated as Hedging Instrument | Current Portion of Long-Term Debt | Fixed Rate Debt Swapped to Floating
Derivative Instruments [Line Items]
Derivative liabilities	403	801	801
Designated as Hedging Instrument | Long-Term Debt | Fixed Rate Debt Swapped to Floating
Derivative Instruments [Line Items]
Derivative liabilities	450	855	853
Designated as Hedging Instrument | Long-Term Debt | Foreign Currency Denominated Debt [Member]
Derivative Instruments [Line Items]
Derivative liabilities	329	0	0
Not Designated as Hedging Instrument
Derivative Instruments [Line Items]
Derivative assets	147	191	233
Derivative liabilities	30	26	22
Not Designated as Hedging Instrument | Other Current Assets | Foreign Currency Exchange Derivatives
Derivative Instruments [Line Items]
Derivative assets	0	27	28
Not Designated as Hedging Instrument | Other Current Assets | Commodity Derivatives
Derivative Instruments [Line Items]
Derivative assets	0	0	0
Not Designated as Hedging Instrument | Other Current Assets | Interest Rate Swaps
Derivative Instruments [Line Items]
Derivative assets	0	0	0
Not Designated as Hedging Instrument | Other Current Assets | Cross-Currency Interest Rate Swaps
Derivative Instruments [Line Items]
Derivative assets	0	0	0
Not Designated as Hedging Instrument | Other Noncurrent Assets | Interest Rate Swaps
Derivative Instruments [Line Items]
Derivative assets	0	0	0
Not Designated as Hedging Instrument | Other Noncurrent Assets | Equity swap
Derivative Instruments [Line Items]
Derivative assets	147	164	205
Not Designated as Hedging Instrument | Other Current Liabilities | Foreign Currency Exchange Derivatives
Derivative Instruments [Line Items]
Derivative liabilities	30	26	22
Not Designated as Hedging Instrument | Other Current Liabilities | Commodity Derivatives
Derivative Instruments [Line Items]
Derivative liabilities	0	0	0
Not Designated as Hedging Instrument | Other Current Liabilities | Cross-Currency Interest Rate Swaps
Derivative Instruments [Line Items]
Derivative liabilities	0	0	0
Not Designated as Hedging Instrument | Current Portion of Long-Term Debt | Fixed Rate Debt Swapped to Floating
Derivative Instruments [Line Items]
Derivative liabilities	0	0	0
Not Designated as Hedging Instrument | Long-Term Debt | Fixed Rate Debt Swapped to Floating
Derivative Instruments [Line Items]
Derivative liabilities	0	0	0
Not Designated as Hedging Instrument | Long-Term Debt | Foreign Currency Denominated Debt [Member]
Derivative Instruments [Line Items]
Derivative liabilities	$ 0	$ 0	$ 0

Derivative Instruments and He78

Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities - Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
Offsetting Derivative Assets and Liabilities [Abstract]
Gross amount recognized, derivative assets	$ 172	$ 233	$ 307
Gross amount recognized, derivative liabilities	1,252	1,727	1,733
Gross amount eligible for offsetting, derivative assets	(10)	(8)	(25)
Gross amount eligible for offsetting, derivative liabilities	(10)	(8)	(25)
Net derivative amount, derivative assets	162	225	282
Net derivative amount, derivative liabilities	$ 1,242	$ 1,719	$ 1,708

Derivative Instruments and He79

Derivative Instruments and Hedging Activities - Location and Amount of Gains and Losses on Derivative Instruments and Related Hedge Items (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Gain (Loss) Recognized in Income, Derivative not Recognized as Hedge	$ (16)	$ 9	$ (23)	$ 24
Foreign Currency Exchange Derivatives | Cost of Sales
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Gain (Loss) Recognized in Income, Derivative not Recognized as Hedge	0	(1)	(1)	(3)
Foreign Currency Exchange Derivatives | Net Financing Charges
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Gain (Loss) Recognized in Income, Derivative not Recognized as Hedge	(14)	2	(14)	0
Equity swap | Selling, General And Administrative
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Gain (Loss) Recognized in Income, Derivative not Recognized as Hedge	(2)	8	(8)	27
Cash Flow Hedging
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Amount of Gain (Loss) Reclassified from AOCI into Income	1	(3)	(3)	(2)
Amount of Gain (Loss) Recognized in AOCI on Derivative	(4)	0	(4)	0	$ (7)
Cash Flow Hedging | Foreign Currency Exchange Derivatives
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Amount of Gain (Loss) Recognized in AOCI on Derivative	(6)	1	(6)	1	(5)
Cash Flow Hedging | Foreign Currency Exchange Derivatives | Cost of Sales
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Amount of Gain (Loss) Reclassified from AOCI into Income	5	(2)	5	(1)
Cash Flow Hedging | Commodity Derivatives
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Amount of Gain (Loss) Recognized in AOCI on Derivative	(2)	(6)	(2)	(6)	(7)
Cash Flow Hedging | Commodity Derivatives | Cost of Sales
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Amount of Gain (Loss) Reclassified from AOCI into Income	(5)	(2)	(9)	(2)
Cash Flow Hedging | Treasury Lock
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Amount of Gain (Loss) Recognized in AOCI on Derivative	4	5	4	5	$ 5
Cash Flow Hedging | Treasury Lock | Net Financing Charges
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Amount of Gain (Loss) Reclassified from AOCI into Income	1	1	1	1
Fair Value Hedging
Fair Value Hedge [Abstract]
Gain (Loss) Recognized in Income, Fair Value Hedge	0	0	0	0
Fair Value Hedging | Interest Rate Swaps | Net Financing Charges
Fair Value Hedge [Abstract]
Gain (Loss) Recognized in Income, Fair Value Hedge	2	3	(3)	5
Fair Value Hedging | Fixed Rate Debt Swapped to Floating | Net Financing Charges
Fair Value Hedge [Abstract]
Gain (Loss) Recognized in Income, Fair Value Hedge	$ (2)	$ (3)	$ 3	$ (5)

Derivative Instruments and He80

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

Derivative Instruments and He81

Derivative Instruments and Hedging Activities - Additional Information (Detail) ¥ in Billions	3 Months Ended			6 Months Ended
	Mar. 31, 2016USD ($)Swap	Mar. 31, 2015USD ($)Swap	Sep. 30, 2005USD ($)Agreement	Mar. 31, 2016USD ($)Swap	Mar. 31, 2015USD ($)Swap	Mar. 31, 2016JPY (¥)Swap	Sep. 30, 2015USD ($)Swap	Sep. 30, 2015JPY (¥)Swap	Mar. 31, 2015JPY (¥)Swap	Mar. 31, 2006Agreement
Derivative [Line Items]
Hedge percentage for foreign exchange transactional exposures, Minimum				70.00%
Hedge percentage for foreign exchange transactional exposures, Maximum				90.00%
Number of fixed to floating interest rate swaps outstanding | Swap	8	12		8	12	8	12	12	12
Number of forward treasury lock agreements | Agreement			3
Notional amount of forward treasury lock agreements, total			$ 1,300,000,000
Types Of Notes Forward Treasury Lock Agreements Fixed Portion Of Future Interest Cost			5-year, 10-year and 30-year notes
Number of forward treasury lock agreements terminated | Agreement										3
Collateral posted	$ 0	$ 0		$ 0	$ 0		$ 0
Amount of gains (losses) recognized in CTA on the effective portion of outstanding net investment hedges	17,000,000	12,000,000		17,000,000	12,000,000		$ 2,000,000
Gains (losses) reclassified from CTA to income for the Company's outstanding net investment hedges	0	0		0	0
Gains (losses) recognized in income for the ineffective portion of cash flow hedges	$ 0	$ 0		$ 0	$ 0
Cross-Currency Interest Rate Swaps
Derivative [Line Items]
Number of fixed to floating interest rate swaps outstanding | Swap	2	4		2	4	2	4	4	4
Cross-currency interest rate swaps outstanding | ¥						¥ 10		¥ 20	¥ 20
Foreign Currency Denominated Debt [Member]
Derivative [Line Items]
Cross-currency interest rate swaps outstanding | ¥						¥ 37		¥ 0	¥ 0
Common stock shares
Derivative [Line Items]
Derivative, Amount of Hedged Item	$ 3,800,000	$ 4,100,000		$ 3,800,000	$ 4,100,000		$ 4,000,000

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	$ 176	$ 237	$ 312
Liabilities, Fair Value Disclosure, Recurring	1,252	1,727	1,733
Other Current Assets | Foreign Currency Exchange Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	21	58	78
Other Current Assets | Cross-Currency Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring		5	20
Other Current Assets | Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring		1	2
Other Current Assets | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	1
Other Noncurrent Assets | Common stock shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	4	4	5
Other Noncurrent Assets | Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	3	5	2
Other Noncurrent Assets | Equity swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	147	164	205
Other Current Liabilities | Foreign Currency Exchange Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	60	63	72
Other Current Liabilities | Cross-Currency Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	7	1
Other Current Liabilities | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	3	7	7
Current Portion of Long-Term Debt | Fixed Rate Debt Swapped to Floating
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	403	801	801
Long-Term Debt | Fixed Rate Debt Swapped to Floating
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	450	855	853
Long-Term Debt | Foreign Currency Denominated Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	329
Quoted Prices in Active Markets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	151	168	210
Liabilities, Fair Value Disclosure, Recurring	329	0	0
Quoted Prices in Active Markets (Level 1) | Other Current Assets | Foreign Currency Exchange Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0	0
Quoted Prices in Active Markets (Level 1) | Other Current Assets | Cross-Currency Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring		0	0
Quoted Prices in Active Markets (Level 1) | Other Current Assets | Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring		0	0
Quoted Prices in Active Markets (Level 1) | Other Current Assets | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0
Quoted Prices in Active Markets (Level 1) | Other Noncurrent Assets | Common stock shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	4	4	5
Quoted Prices in Active Markets (Level 1) | Other Noncurrent Assets | Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0	0
Quoted Prices in Active Markets (Level 1) | Other Noncurrent Assets | Equity swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	147	164	205
Quoted Prices in Active Markets (Level 1) | Other Current Liabilities | Foreign Currency Exchange Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	0	0	0
Quoted Prices in Active Markets (Level 1) | Other Current Liabilities | Cross-Currency Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	0	0
Quoted Prices in Active Markets (Level 1) | Other Current Liabilities | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	0	0	0
Quoted Prices in Active Markets (Level 1) | Current Portion of Long-Term Debt | Fixed Rate Debt Swapped to Floating
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	0	0	0
Quoted Prices in Active Markets (Level 1) | Long-Term Debt | Fixed Rate Debt Swapped to Floating
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	0	0	0
Quoted Prices in Active Markets (Level 1) | Long-Term Debt | Foreign Currency Denominated Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	329
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	25	69	102
Liabilities, Fair Value Disclosure, Recurring	923	1,727	1,733
Significant Other Observable Inputs (Level 2) | Other Current Assets | Foreign Currency Exchange Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	21	58	78
Significant Other Observable Inputs (Level 2) | Other Current Assets | Cross-Currency Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring		5	20
Significant Other Observable Inputs (Level 2) | Other Current Assets | Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring		1	2
Significant Other Observable Inputs (Level 2) | Other Current Assets | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	1
Significant Other Observable Inputs (Level 2) | Other Noncurrent Assets | Common stock shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0	0
Significant Other Observable Inputs (Level 2) | Other Noncurrent Assets | Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	3	5	2
Significant Other Observable Inputs (Level 2) | Other Noncurrent Assets | Equity swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0	0
Significant Other Observable Inputs (Level 2) | Other Current Liabilities | Foreign Currency Exchange Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	60	63	72
Significant Other Observable Inputs (Level 2) | Other Current Liabilities | Cross-Currency Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	7	1
Significant Other Observable Inputs (Level 2) | Other Current Liabilities | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	3	7	7
Significant Other Observable Inputs (Level 2) | Current Portion of Long-Term Debt | Fixed Rate Debt Swapped to Floating
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	403	801	801
Significant Other Observable Inputs (Level 2) | Long-Term Debt | Fixed Rate Debt Swapped to Floating
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	450	855	853
Significant Other Observable Inputs (Level 2) | Long-Term Debt | Foreign Currency Denominated Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0	0
Liabilities, Fair Value Disclosure, Recurring	0	0	0
Significant Unobservable Inputs (Level 3) | Other Current Assets | Foreign Currency Exchange Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0	0
Significant Unobservable Inputs (Level 3) | Other Current Assets | Cross-Currency Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring		0	0
Significant Unobservable Inputs (Level 3) | Other Current Assets | Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring		0	0
Significant Unobservable Inputs (Level 3) | Other Current Assets | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0
Significant Unobservable Inputs (Level 3) | Other Noncurrent Assets | Common stock shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0	0
Significant Unobservable Inputs (Level 3) | Other Noncurrent Assets | Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0	0
Significant Unobservable Inputs (Level 3) | Other Noncurrent Assets | Equity swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Recurring	0	0	0
Significant Unobservable Inputs (Level 3) | Other Current Liabilities | Foreign Currency Exchange Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	0	0	0
Significant Unobservable Inputs (Level 3) | Other Current Liabilities | Cross-Currency Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	0	0
Significant Unobservable Inputs (Level 3) | Other Current Liabilities | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	0	0	0
Significant Unobservable Inputs (Level 3) | Current Portion of Long-Term Debt | Fixed Rate Debt Swapped to Floating
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	0	0	0
Significant Unobservable Inputs (Level 3) | Long-Term Debt | Fixed Rate Debt Swapped to Floating
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	0	$ 0	$ 0
Significant Unobservable Inputs (Level 3) | Long-Term Debt | Foreign Currency Denominated Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Recurring	$ 0

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Measurements - Fixed Rate Bonds (Details) $ in Millions	Mar. 31, 2016Swap	Sep. 30, 2015Swap	Mar. 31, 2015Swap	Jun. 30, 2014USD ($)Swap	Sep. 30, 2013USD ($)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

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) ¥ in Billions	Mar. 31, 2016USD ($)Swap	Mar. 31, 2016JPY (¥)Swap	Sep. 30, 2015USD ($)Swap	Sep. 30, 2015JPY (¥)Swap	Mar. 31, 2015USD ($)Swap	Mar. 31, 2015JPY (¥)Swap
Derivative [Line Items]
Number of Interest Rate Derivatives Held | Swap	8	8	12	12	12	12
Fair value of long term debt	$ 6,000,000,000		$ 6,700,000,000		$ 6,800,000,000
Unrealized Gains
Derivative [Line Items]
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	0		0		0
Unrealized Losses [Member]
Derivative [Line Items]
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	$ 0		$ 0		$ 0
Cross-Currency Interest Rate Swaps
Derivative [Line Items]
Cross-currency interest rate swaps outstanding | ¥		¥ 10		¥ 20		¥ 20
Number of Interest Rate Derivatives Held | Swap	2	2	4	4	4	4
Foreign Currency Denominated Debt [Member]
Derivative [Line Items]
Cross-currency interest rate swaps outstanding | ¥		¥ 37		¥ 0		¥ 0

Impairment of Long-Lived Asse85

Impairment of Long-Lived Assets (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)
Impairment of Long Lived Assets [Line Items]
Tangible and Intangible Asset Impairment Charges	$ 29
Corporate Segment
Impairment of Long Lived Assets [Line Items]
Tangible and Intangible Asset Impairment Charges	5
Building Efficiency Products North America
Impairment of Long Lived Assets [Line Items]
Tangible and Intangible Asset Impairment Charges	8
Automotive Experience Seating [Member]
Impairment of Long Lived Assets [Line Items]
Tangible and Intangible Asset Impairment Charges	9
Asia [Member]
Impairment of Long Lived Assets [Line Items]
Tangible and Intangible Asset Impairment Charges	4
Building Efficiency Rest of World [Member]
Impairment of Long Lived Assets [Line Items]
Tangible and Intangible Asset Impairment Charges	$ 3

Segment Information - Additiona

Segment Information - Additional Information (Detail)	6 Months Ended	12 Months Ended
	Mar. 31, 2016BusinessSegment	Sep. 30, 2015Segment
Segment Reporting Information [Line Items]
Number of primary businesses | Business	3
Number of reportable segments	7
Building Efficiency
Segment Reporting Information [Line Items]
Number of reportable segments	4	3

Segment Information - Financial

Segment Information - Financial Information Related to Company's Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 9,031	$ 9,198	$ 17,960	$ 18,822
Segment Income	702	680	1,389	1,386
Restructuring and impairment costs	229	0	229	0
Net financing charges	(74)	(69)	(142)	(140)
Income from continuing operations before income taxes	399	611	1,018	1,246
Power Solutions
Segment Reporting Information [Line Items]
Net sales	1,583	1,588	3,323	3,432
Segment Income	264	264	606	579
Building Efficiency
Segment Reporting Information [Line Items]
Net sales	3,150	2,377	6,106	4,874
Segment Income	221	166	388	323
Building Efficiency | Building Efficiency Products North America
Segment Reporting Information [Line Items]
Net sales	546	545	1,103	1,103
Segment Income	27	49	44	93
Building Efficiency | Building Efficiency Systems and Service North America
Segment Reporting Information [Line Items]
Net sales	1,034	959	2,018	1,916
Segment Income	88	84	181	148
Building Efficiency | Building Efficiency Asia
Segment Reporting Information [Line Items]
Net sales	1,162	428	2,154	929
Segment Income	102	26	164	75
Building Efficiency | Building Efficiency Rest of World [Member]
Segment Reporting Information [Line Items]
Net sales	408	445	831	926
Segment Income	4	7	(1)	7
Automotive Experience
Segment Reporting Information [Line Items]
Net sales	4,298	5,233	8,531	10,516
Segment Income	217	250	395	484
Automotive Experience | Seating
Segment Reporting Information [Line Items]
Net sales	4,177	4,141	8,263	8,276
Segment Income	184	229	350	430
Automotive Experience | Interiors
Segment Reporting Information [Line Items]
Net sales	121	1,092	268	2,240
Segment Income	$ 33	$ 21	$ 45	$ 54

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Reserves for environmental liabilities	$ 25	$ 23	$ 22
Conditional asset retirement obligations	$ 76	$ 59	$ 64

Merger Transaction Merger Trans

Merger Transaction Merger Transaction (Details)	6 Months Ended
	Mar. 31, 2016USD ($)$ / shares
Merger Transaction [Abstract]
Cash consideration election option for the Company's shareholders at time of merger	$ 34.88
Amount JCI shareholders to receive at time of merger | $	$ 3,864,000,000
Merger, issued and unissued ordinary share of Tyco at time of Merger	$ 0.955
Ownership Percentage of New Entity, JCI shareholders	56.00%
Ownership Percentage of New Entity, Tyco Shareholders	44.00%
Shareholder votes needed to approve merger	75.00%
Combined Company, Board of Directors Post Merger	11
Combined Company, Board of Directors from JCI Prior to Merger	6
Combined Company, Board of Directors from Tyco Prior to Merger	5
Combined Company, Board of Directors Mutually Agreed Upon, Prior to Merger	9
Combined Company, Board of Director serving as Independent Lead Director from JCI, Prior to Merger	1
Period for which Alex Molinaroli will serve as Chairman and CEO of Combined Company	18-month
Period for which Alex Molinaroli will serve as Executive Chair of the Combined Company, Following his time as Chairman and CEO	12 months
Period after the Second Succession Date in which the non-executive directors of the combined company can vote for Chairmand and CEO	3 months
Affirmative Votes Needed to Affirm Chairman and CEO	75.00%