Johnson Controls International (JCI) 10-Q 1 Aug 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	9 Months Ended
	Jun. 30, 2019shares
Document and Entity Information [Abstract]
Document Transition Report	false
Document Quarterly Report	true
Title of 12(b) Security	Ordinary Shares, Par Value $0.01
Entity Incorporation, State or Country Code	L2
Entity Registrant Name	JOHNSON CONTROLS INTERNATIONAL PLC
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Central Index Key	0000833444
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Entity File Number	001-13836
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Trading Symbol	JCI
Amendment Flag	false
Entity Common Stock, Shares Outstanding	795,706,564
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Tax Identification Number	98-0390500
Entity Address, Address Line One	One Albert Quay,
Entity Address, City or Town	Cork,
Entity Address, Country	IE
City Area Code	(353)
Local Phone Number	21-423-5000
Security Exchange Name	NYSE
Entity Shell Company	false
Entity Address, Postal Zip Code	T12 X8N6

Consolidated Statements of Fina

Consolidated Statements of Financial Position - USD ($) $ in Millions	Jun. 30, 2019	Sep. 30, 2018
Assets
Cash and cash equivalents	$ 3,685	$ 185
Accounts receivable - net	6,033	5,622
Inventories	2,050	1,819
Assets held for sale	95	3,015
Other current assets	1,179	1,182
Current assets	13,042	11,823
Property, plant and equipment - net	3,282	3,300
Goodwill	18,312	18,381
Other intangible assets - net	5,739	6,187
Investments in partially-owned affiliates	848	848
Noncurrent assets held for sale	59	5,188
Other noncurrent assets	1,787	3,070
Total assets	43,069	48,797
Liabilities and Equity
Short-term debt	20	1,306
Current portion of long-term debt	501	1
Accounts payable	3,671	3,407
Accrued compensation and benefits	781	1,021
Deferred revenue	1,389	1,326
Liabilities held for sale	46	1,791
Other current liabilities	2,834	2,398
Current liabilities	9,242	11,250
Long-term debt	6,804	9,623
Pension and postretirement benefits	493	616
Noncurrent liabilities held for sale	0	207
Other noncurrent liabilities	5,121	4,643
Long-term liabilities	12,418	15,089
Commitments and contingencies (Note 20)
Ordinary shares, $0.01 par value	9	10
Ordinary A shares, €1.00 par value	0	0
Preferred shares, $0.01 par value	0	0
Ordinary shares held in treasury, at cost	(2,168)	(1,053)
Capital in excess of par value	16,720	16,549
Retained earnings	6,366	6,604
Accumulated other comprehensive loss	(564)	(946)
Shareholders' equity attributable to Johnson Controls	20,363	21,164
Noncontrolling interests	1,046	1,294
Total equity	21,409	22,458
Total liabilities and equity	$ 43,069	$ 48,797

Consolidated Statements of Fi_2

Consolidated Statements of Financial Position (Parenthetical)	Jun. 30, 2019€ / shares	Jun. 30, 2019$ / shares	Sep. 30, 2018€ / shares	Sep. 30, 2018$ / shares
Ordinary shares, par value		$ 0.01		$ 0.01
Preferred shares, par value		$ 0.01		$ 0.01
Common Class A [Member]
Ordinary shares, par value | € / shares	€ 1		€ 1

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019		Jun. 30, 2018
Net sales		$ 6,451	$ 6,282	$ 17,694		$ 17,217
Cost of sales		4,307	4,194	11,981		11,607
Gross profit		2,144	2,088	5,713		5,610
Selling, general and administrative expenses		(1,388)	(1,441)	(4,284)		(4,250)
Restructuring and impairment costs		(235)	0	(235)		(154)
Net financing charges		(119)	(95)	(302)		(304)
Equity income		62	55	137		129
Income from continuing operations before income taxes		464	607	1,029		1,031
Income tax provision		239	61	394		314
Income from continuing operations		225	546	635		717
Income from discontinued operations, net of tax (Note 4)		4,051	258	4,598		841
Net income		4,276	804	5,233		1,558
Income from continuing operations attributable to noncontrolling interests		84	72	147		134
Income from discontinued operations attributable to noncontrolling interests		0	9	24		33
Net income attributable to Johnson Controls		4,192	723	5,062		1,391
Amounts attributable to Johnson Controls ordinary shareholders
Income from continuing operations		141	474	488		583
Income from discontinued operations		$ 4,051	$ 249	$ 4,574		$ 808
Earnings per share
Basic earnings per share from continuing operations		$ 0.16	$ 0.51	$ 0.54		$ 0.63
Basic earnings per share from discontinued operations		4.65	0.27	5.09		0.87
Basic earnings per share		4.81	0.78	5.63	[1]	1.50	[1]
Diluted earnings per share from continuing operations		0.16	0.51	0.54		0.63
Diluted earnings per share from discontinued operations		4.63	0.27	5.07		0.87
Diluted earnings per share	[1]	$ 4.79	$ 0.78	$ 5.61		$ 1.49
Products and Systems [Member]
Net sales		$ 4,896	$ 4,727	$ 13,058		$ 12,694
Cost of sales		3,380	3,324	9,233		9,082
Services [Member]
Net sales		1,555	1,555	4,636		4,523
Cost of sales		$ 927	$ 870	$ 2,748		$ 2,525
[1]	Certain items do not sum due to rounding.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 4,276	$ 804	$ 5,233	$ 1,558
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	(94)	(614)	(95)	(331)
Realized and unrealized gains (losses) on derivatives	(9)	1	10	(10)
Realized and unrealized losses on marketable securities	0	0	0	(2)
Other comprehensive loss	(103)	(613)	(85)	(343)
Total comprehensive income	4,173	191	5,148	1,215
Comprehensive income attributable to noncontrolling interests	76	22	179	159
Comprehensive income attributable to Johnson Controls	$ 4,097	$ 169	$ 4,969	$ 1,056

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating Activities of Continuing Operations
Net income from continuing operations attributable to Johnson Controls	$ 488	$ 583
Income from continuing operations attributable to noncontrolling interests	147	134
Income from discontinued operations attributable to noncontrolling interests	24	33
Income from continuing operations	635	717
Adjustments to reconcile net income from continuing operations to cash provided by operating activities:
Depreciation and amortization	625	649
Pension and postretirement benefit income	(85)	(108)
Pension and postretirement contributions	(51)	(53)
Equity in earnings of partially-owned affiliates, net of dividends received	6	(84)
Deferred income taxes	382	(78)
Non-cash restructuring and impairment charges	235	28
Gain on Scott Safety business divestiture	0	(114)
Equity-based compensation	66	77
Other - net	42	(6)
Changes in assets and liabilities, excluding acquisitions and divestitures:
Accounts receivable	(494)	(454)
Inventories	(289)	(211)
Other assets	(62)	(245)
Restructuring reserves	(84)	(55)
Accounts payable and accrued liabilities	(36)	268
Accrued income taxes	(179)	366
Cash provided by operating activities from continuing operations	711	697
Investing Activities of Continuing Operations
Capital expenditures	(401)	(481)
Sale of property, plant and equipment	15	23
Acquisition of businesses, net of cash acquired	(16)	(24)
Business divestitures, net of cash divested	12	2,101
Proceeds (payments) for equity swap	14	(15)
Changes in long-term investments	13	(3)
Cash provided (used) by investing activities from continuing operations	(363)	1,601
Financing Activities of Continuing Operations
Increase (decrease) in short-term debt - net	(1,286)	347
Increase in long-term debt	0	886
Repayment of long-term debt	(2,333)	(2,743)
Debt financing costs	0	(4)
Stock repurchases	(5,122)	(255)
Payment of cash dividends	(712)	(714)
Proceeds from the exercise of stock options	111	39
Employee equity-based compensation withholding taxes	(26)	(38)
Dividends paid to noncontrolling interests	(132)	(43)
Cash used by financing activities from continuing operations	(9,500)	(2,525)
Cash Provided by Operating Activities, Discontinued Operations	117	567
Cash Provided (Used) by Investing Activities, Discontinued Operations	12,580	(312)
Cash Used by Financing Activities, Discontinued Operations	(35)	(3)
Net Cash Provided by Discontinued Operations	12,662	252
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations	(24)	(84)
Change in cash held for sale	15	13
Increase (decrease) in Cash, Cash Equivalents and Restricted Cash	3,501	(46)
Cash, cash equivalents and restricted cash at beginning of period	200	332
Cash, cash equivalents and restricted cash at end of period	3,701	286
Less: Restricted Cash	16	19
Cash and cash equivalents at end of period	$ 3,685	$ 267

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity Attributable to Johnson Controls Ordinary Shareholders Consolidated Statements of Shareholders' Equity Attributable to Johnson Controls Ordinary Shareholders - USD ($) $ in Millions	Total	Ordinary Shares	Capital in excess of par value	Retained Earnings	Treasury Stock, at Cost	Accumulated Other Comprehensive Loss	Power Solutions	Power SolutionsOrdinary Shares	Power SolutionsCapital in excess of par value	Power SolutionsRetained Earnings	Power SolutionsTreasury Stock, at Cost	Power SolutionsAccumulated Other Comprehensive Loss
Beginning balance at Sep. 30, 2017	$ 20,447	$ 9	$ 16,390	$ 5,231	$ (710)	$ (473)
Comprehensive income (loss)	1,056	0	0	1,391	0	(335)
Cash dividends - ordinary shares	(722)	0	0	(722)	0	0
Repurchase of ordinary shares	(255)	0	0	0	(255)	0
Accounting Pronouncement | Adoption of ASU 2016-09	179	0	0	179	0	0
Accounting Pronouncement | Adoption of ASU 2016-01						0
Other, including options exercised	68	0	111	(4)	(39)	0
Ending balance at Jun. 30, 2018	20,773	9	16,501	6,075	(1,004)	(808)
Beginning balance at Mar. 31, 2018	20,874	9	16,471	5,594	(946)	(254)
Comprehensive income (loss)	169	0	0	723	0	(554)
Cash dividends - ordinary shares	(240)	0	0	(240)	0	0
Repurchase of ordinary shares	(56)	0	0	0	(56)	0
Other, including options exercised	26	0	30	(2)	(2)	0
Ending balance at Jun. 30, 2018	20,773	9	16,501	6,075	(1,004)	(808)
Beginning balance at Sep. 30, 2018	21,164	10	16,549	6,604	(1,053)	(946)
Comprehensive income (loss)	4,969	0	0	5,062	0	(93)
Cash dividends - ordinary shares	(683)	0	0	(683)	0	0
Repurchases and retirements of ordinary shares	(5,122)
Repurchase of ordinary shares	(1,087)		0		(1,087)	0
Stock Repurchased and Retired During Period, Value	(4,035)	(1)		(4,034)
Divestiture of Power Solutions							$ 483	$ 0	$ 0	$ 0	$ 0	$ 483
Accounting Pronouncement | Adoption of ASC 606	(45)	0	0	(45)	0	0
Accounting Pronouncement | Adoption of ASU 2016-01	0	0	0	8	0	(8)
Accounting Pronouncement | Adoption of ASU 2016-16	(546)	0	0	(546)	0	0
Other, including options exercised	143	0	171	0	(28)	0
Ending balance at Jun. 30, 2019	20,363	9	16,720	6,366	(2,168)	(564)
Beginning balance at Mar. 31, 2019	20,036	10	16,640	6,416	(2,078)	(952)
Comprehensive income (loss)	4,097	0	0	4,192	0	(95)
Cash dividends - ordinary shares	(208)	0	0	(208)	0	0
Repurchases and retirements of ordinary shares	(4,122)
Repurchase of ordinary shares	(87)		0		(87)	0
Stock Repurchased and Retired During Period, Value		(1)		(4,034)
Divestiture of Power Solutions							$ 483	$ 0	$ 0	$ 0	$ 0	$ 483
Other, including options exercised	77	0	80	0	(3)	0
Ending balance at Jun. 30, 2019	$ 20,363	$ 9	$ 16,720	$ 6,366	$ (2,168)	$ (564)

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity Attributable to Johnson Controls Ordinary Shareholders Consolidated Statements of Shareholders' Equity Attributable to Johnson Controls Ordinary Shareholders (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Dividend declared	$ 0.26	$ 0.26	$ 0.78	$ 0.78
Retained Earnings
Dividend declared	$ 0.26	$ 0.26	$ 0.78	$ 0.78

Financial Statements

Financial Statements	9 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Financial Statements	Financial Statements The consolidated financial statements include the consolidated accounts of Johnson Controls International plc, a corporation organized under the laws of Ireland, and its subsidiaries (Johnson Controls International plc and all its subsidiaries, hereinafter collectively referred to as the "Company" or "Johnson Controls"). In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments (which include normal recurring adjustments) necessary to state 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 Company's Annual Report on Form 10-K for the year ended September 30, 2018 filed with the SEC on November 20, 2018. The results of operations for the three and nine month periods ended June 30, 2019 are not necessarily indicative of results for the Company’s 2019 fiscal year because of seasonal and other factors. Nature of Operations Johnson Controls International plc, headquartered in Cork, Ireland, is a global diversified technology and multi industrial leader serving a wide range of customers in more than 150 countries. The Company creates intelligent buildings, efficient energy solutions and integrated infrastructure that work seamlessly together to deliver on the promise of smart cities and communities. The Company is committed to helping its customers win and creating greater value for all of its stakeholders through its strategic focus on buildings. The Company is a global market leader in engineering, developing, manufacturing and installing building products and systems around the world, including heating, ventilating, air-conditioning ("HVAC") equipment, HVAC controls, energy-management systems, security systems, fire detection systems and fire suppression solutions. The Company further serves customers by providing technical services (in the HVAC, security and fire-protection space), energy-management consulting and data-driven solutions via its data-enabled business. Finally, the Company has a strong presence in the North American residential air conditioning and heating systems market and is a global market leader in industrial refrigeration products. Principles of Consolidation The consolidated financial statements include the consolidated accounts of Johnson Controls International plc and its subsidiaries that are consolidated in conformity with U.S. GAAP. All significant intercompany transactions have been eliminated. The results of companies acquired or disposed of during the year are included in the consolidated financial statements from the effective date of acquisition or up to the date of disposal. 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. The Company did not have a significant variable interest in any consolidated or nonconsolidated VIEs in its continuing operations for the presented reporting periods. Restricted Cash At June 30, 2019 , the Company held restricted cash of approximately $16 million , all of which was recorded within other current assets in the consolidated statements of financial position. These amounts were related to cash restricted for payment of asbestos liabilities. At September 30, 2018 , the Company held restricted cash of approximately $15 million , of which $6 million was recorded within other current assets in the consolidated statements of financial position and $9 million was recorded within other noncurrent assets in the consolidated statements of financial position. Retrospective Changes During the first quarter of fiscal 2019, the Company determined that its Power Solutions business met the criteria to be classified as a discontinued operation, which required retrospective application to financial information for all periods presented. Refer to Note 4, "Discontinued Operations" of the notes to consolidated financial statements for further information regarding the Company's discontinued operations. In November 2016, the FASB issued Accounting Standards Update ("ASU") No. 2016-18, "Statement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Issues Task Force)." The ASU requires amounts generally described as restricted cash and restricted cash equivalents to be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. ASU No. 2016-18 was effective retrospectively for the quarter ended December 31, 2018. The impact of this guidance did not have a significant impact on the Company's consolidated financial statements for the periods presented. In August 2016, the FASB issued ASU No. 2016-15, "Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments." ASU No. 2016-15 provides clarification guidance on eight specific cash flow presentation issues in order to reduce the diversity in practice. ASU No. 2016-15 was effective retrospectively for the Company for the quarter ending December 31, 2018. The adoption of this guidance had an impact on the presentation of equity swap funding and settlement activities since the activity changed from an operating activity to an investing activity.

New Accounting Standards

New Accounting Standards	9 Months Ended
	Jun. 30, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Standards	New Accounting Standards Recently Adopted Accounting Pronouncements On August 17, 2018, the SEC issued the final rule under SEC Release No. 33-10532, "Disclosure Update and Simplification," that amends certain of its disclosure requirements that have become redundant, duplicative, overlapping, outdated or superseded. The final rule extends to interim periods the annual disclosure requirement of presenting changes in each caption of stockholders' equity and the amount of dividends per share. These disclosures are required to be provided for the current and comparative interim periods. As a result, the Company has included the Consolidated Statements of Shareholders' Equity Attributable to Johnson Controls Ordinary Shareholders for the three and nine month periods ended June 30, 2019 and 2018 in this quarterly report on Form 10-Q. In March 2018, the FASB issued ASU No. 2018-05, "Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118," to add various SEC paragraphs pursuant to the issuance of SEC Staff Accounting Bulletin No. 118 ("SAB 118") to ASC 740 "Income Taxes." SAB 118 was issued by the SEC in December 2017 to provide immediate guidance for accounting implications of U.S. Tax Reform under the "Tax Cuts and Jobs Act" in the period of enactment. SAB 118 provides for a provisional one year measurement period for entities to finalize their accounting for certain income tax effects related to the "Tax Cuts and Jobs Act." The Company applied this guidance to its consolidated financial statements and related disclosures beginning in the first quarter of fiscal 2018. In the first quarter of fiscal 2019, the Company completed its analysis of all enactment-date income tax effects of the U.S. tax law change. Refer to Note 9, "Income Taxes," of the notes to consolidated financial statements for further information. In March 2017, the FASB issued ASU No. 2017-07, "Compensation—Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost." The ASU requires the service cost component of net periodic benefit cost to be presented with other compensation costs. The other components of net periodic benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. The ASU also allows only the service cost component of net periodic benefit cost to be eligible for capitalization. ASU No. 2017-07 was effective for the quarter ended December 31, 2018. The guidance was effective retrospectively except for the capitalization of the service cost component which was applied prospectively. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements as the Company does not present a subtotal of income from operations within its consolidated statements of income. In October 2016, the FASB issued ASU No. 2016-16, "Accounting for Income Taxes: Intra-Entity Asset Transfers of Assets Other than Inventory." The ASU requires the tax effects of all intra-entity sales of assets other than inventory to be recognized in the period in which the transaction occurs. The guidance was effective for the Company for the quarter ending December 31, 2018. The changes were applied by means of a cumulative-effect adjustment which resulted in a reduction to retained earnings and other noncurrent assets of $546 million . 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, including marketable securities. Additionally in February 2018, the FASB issued ASU No. 2018-03, "Technical Corrections and Improvements to Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities," which provides additional clarification on certain topics addressed in ASU No. 2016-01. ASU No. 2016-01 and ASU No. 2018-03 were effective for the Company for the quarter ending December 31, 2018. The changes were applied by means of a cumulative-effect adjustment which resulted in an increase to retained earnings of $8 million . The new standard requires the mark-to-market of marketable securities investments previously recorded within accumulated other comprehensive income on the statement of financial position be recorded in the statement of income on a prospective basis beginning as of the adoption date. As these restricted investments do not relate to the underlying operating performance of its business, the Company’s definition of segment earnings excludes the mark-to-market adjustments beginning in the first quarter of fiscal 2019. Refer to Note 18, "Segment Information," of the notes to consolidated financial statements for further information. In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers (Topic 606)." ASU No. 2014-09 and its related amendments (collectively, the “New Revenue Standard”) clarify 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 Company adopted the New Revenue Standard on October 1, 2018 using a modified retrospective approach. Under the New Revenue Standard, revenue recognition is mostly consistent with the previous guidance, with the exception of the Power Solutions business, which is now reported as a discontinued operation beginning in the first quarter of fiscal 2019. Within the Power Solutions business, certain customers return battery cores which are now included in the transaction price as noncash consideration. The New Revenue Standard did not have a material impact on the Company’s consolidated statements of financial position, consolidated statements of income or its consolidated statements of cash flows. As of October 1, 2018, the Company applied the New Revenue Standard to contracts that were not completed as of this date and recognized a cumulative-effect adjustment of a reduction to retained earnings of $45 million , which relates primarily to deferred revenue recorded for certain battery core returns that represent a material right provided to customers. The prior period comparative information has not been restated and continues to be reported under the previous guidance. The impact of adoption of the New Revenue Standard to the Company's consolidated statement of income for the nine months ended June 30, 2019 for continuing operations was an increase to net sales of approximately $1 million , with the impact to income before taxes of less than $1 million . The impact of adoption of the New Revenue Standard to the Company's consolidated statement of income for the three and nine months ended June 30, 2019 for discontinued operations was an increase to net sales of $77 million and $667 million , respectively, with the impact to income from discontinued operations, net of tax, of approximately $1 million and $26 million , respectively. The impact of adoption of the New Revenue Standard to the Company's consolidated statement of financial position as of June 30, 2019 is as follows (in millions): June 30, 2019 As reported Under previous accounting guidance Impact from adopting the New Revenue Standard Consolidated Statement of Financial Position Assets Accounts receivable - net $ 6,033 $ 6,065 $ (32 ) Inventories 2,050 2,064 (14 ) Other current assets 1,179 1,204 (25 ) Property, plant and equipment - net 3,282 3,242 40 Other noncurrent assets 1,787 1,758 29 Liabilities and Equity Deferred revenue 1,389 1,380 9 Retained earnings 6,366 6,377 (11 ) Recently Issued Accounting Pronouncements 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. The original standard was effective retrospectively for the Company for the quarter ending December 31, 2019 with early adoption permitted; however in July 2018 the FASB issued ASU No. 2018-11, "Leases (Topic 842): Targeted Improvements," which provides an additional transition method that permits changes to be applied by means of a cumulative-effect adjustment recorded in retained earnings as of the beginning of the fiscal year of adoption. The Company has elected this transition method at the adoption date of October 1, 2019. The FASB further amended Topic 842 by issuing ASU No. 2018-01, "Leases (Topic 842): Land Easement Practical Expedient for Transition to Topic 842," which provides an optional transition practical expedient for existing or expired land easements that were not previously recorded as leases, ASU No. 2018-10, "Codification Improvements to Topic 842, Leases," ASU No. 2018-20, "Leases (Topic 842): Narrow-Scope Improvements for Lessors," and ASU No. 2019-01, "Leases (Topic 842): Codification Improvements." The Company is in the process of populating its leases into new lease accounting software and designing and implementing new processes and controls for the accounting for leases under the new guidance. The Company is the lessee under various agreements for facilities and equipment that are currently accounted for as operating leases. The new guidance will require the Company to record operating leases on the balance sheet with a right-of-use asset and corresponding liability for future payment obligations. The Company is finalizing its assessment of the impact adoption of this guidance will have on its consolidated financial statements. The Company expects the new guidance will have a material impact on its consolidated statements of financial position for the addition of right-of-use assets and lease liabilities, but the Company does not expect it to have a material impact on its consolidated statements of income and its consolidated statements of cash flows. Other recently issued accounting pronouncements are not expected to have a material impact on the Company's consolidated financial statements.

Acquisitions and Divestitures

Acquisitions and Divestitures	9 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Acquisition and Divestitures	Acquisitions and Divestitures On April 30, 2019, the Company completed the sale of its Power Solutions business to BCP Acquisitions LLC for a purchase price of $13.2 billion . The net cash proceeds after tax and transaction-related expenses were $11.6 billion . In connection with the sale, the Company recorded a gain, net of transaction and other costs, of $5.2 billion ( $4.0 billion after tax), subject to post-closing working capital and net debt adjustments, within income from discontinued operations, net of tax, in the consolidated statements of income. During the first quarter of fiscal 2019, the Company determined that its Power Solutions business met the criteria to be classified as a discontinued operation and, as a result, Power Solutions' historical financial results are reflected in the Company's consolidated financial statements as a discontinued operation. Refer to Note 4, "Discontinued Operations," of the notes to consolidated financial statements for further disclosure related to the Company's discontinued operations. During the first nine months of fiscal 2019, the Company completed certain divestitures within the Global Products and Building Solutions EMEA/LA businesses. The combined selling price was $18 million , $12 million of which was received as of June 30, 2019. In connection with the sale, the Company reduced goodwill by $1 million within the Building Solutions EMEA/LA segment. The divestitures were not material to the Company's consolidated financial statements. During the first nine months of fiscal 2019, the Company completed certain acquisitions for a combined purchase price of $16 million , all of which was paid as of June 30, 2019. The acquisitions were not material to the Company's consolidated financial statements. In connection with the acquisitions, the Company recorded goodwill of $9 million within the Global Products segment and $1 million within the Building Solutions EMEA/LA segment. During the first nine months of fiscal 2018, the Company completed certain acquisitions for a combined purchase price of $24 million , all of which was paid as of June 30, 2018. The acquisitions were not material to the Company’s consolidated financial statements. In connection with the acquisitions, the Company recorded goodwill of $12 million within the Global Products segment. In the second quarter of fiscal 2018, the Company completed the sale of a certain Global Products business. The selling price was $103 million , all of which was received in the three months ended March 31, 2018. In connection with the sale, the Company reduced goodwill by $20 million . The divestiture was not material to the Company's consolidated financial statements. In the first quarter of fiscal 2018, the Company completed the sale of its Scott Safety business to 3M Company. The selling price, net of cash divested, was $2.0 billion , all of which was received as of December 31, 2017. In connection with the sale, the Company recorded a pre-tax gain of $114 million within selling, general and administrative expenses in the consolidated statements of income and reduced goodwill in the consolidated statements of financial position by $1.2 billion . The gain, net of tax, recorded was $84 million . Net cash proceeds from the transaction of approximately $1.9 billion were used to repay a significant portion of the Tyco International Holding S.a.r.L.'s ("TSarl") $4.0 billion

Discontinued Operations (Notes)

Discontinued Operations (Notes)	9 Months Ended
	Jun. 30, 2019
Discontinued Operations [Abstract]
Discontinued Operations	Discontinued Operations On November 13, 2018, the Company entered into a Stock and Asset Purchase Agreement (“Purchase Agreement”) with BCP Acquisitions LLC (“Purchaser”). The Purchaser is a newly-formed entity controlled by investment funds managed by Brookfield Capital Partners LLC. Pursuant to the Purchase Agreement, on the terms and subject to the conditions therein, the Company agreed to sell, and Purchaser agreed to acquire, the Company’s Power Solutions business for a purchase price of $13.2 billion . The transaction closed on April 30, 2019 with net cash proceeds of $11.6 billion after tax and transaction-related expenses. During the first quarter of fiscal 2019, the Company determined that its Power Solutions business met the criteria to be classified as a discontinued operation and, as a result, Power Solutions' historical financial results are reflected in the Company's consolidated financial statements as a discontinued operation, and assets and liabilities were retrospectively reclassified as assets and liabilities held for sale. The Company did not allocate any general corporate overhead to discontinued operations. The following table summarizes the results of Power Solutions reclassified as discontinued operations for the three and nine month periods ended June 30, 2019 and 2018 (in millions). As the Power Solutions sale occurred on April 30, 2019, there is only one month of Power Solutions results included in the three month period ended June 30, 2019, and only seven months included in the nine month period ended June 30, 2019. Three Months Ended Nine Months Ended 2019 2018 2019 2018 Net sales $ 562 $ 1,838 $ 5,001 $ 5,813 Income from discontinued operations before income taxes 5,315 303 6,039 978 Provision for income taxes on discontinued operations (1,264 ) (45 ) (1,441 ) (137 ) Income from discontinued operations attributable to noncontrolling interests, net of tax — (9 ) (24 ) (33 ) Income from discontinued operations $ 4,051 $ 249 $ 4,574 $ 808 For the three months ended June 30, 2019 , income from discontinued operations before income taxes included a gain on sale of the Power Solutions business, net of transaction and other costs, of $5.2 billion and a favorable impact of $21 million for ceasing depreciation and amortization expense as the business was held for sale. For the nine months ended June 30, 2019 , income from discontinued operations before income taxes included a gain on sale of the Power Solutions business, net of transaction and other costs, of $5.2 billion and a favorable impact of $117 million for ceasing depreciation and amortization expense as the business was held for sale. For the three and nine months ended June 30, 2019 , the effective tax rate was more than the Irish statutory rate of 12.5% primarily due to the tax impacts of the divestiture of the Power Solutions business and tax rate differentials. For the three and nine months ended June 30, 2018 , the effective tax rate was more than the Irish statutory rate of 12.5% primarily due to tax rate differentials. Assets and Liabilities Held for Sale The following table summarizes the carrying value of the Power Solutions assets and liabilities held for sale at September 30, 2018 (in millions): September 30, 2018 Cash $ 15 Accounts receivable - net 1,443 Inventories 1,405 Other current assets 152 Assets held for sale $ 3,015 Property, plant and equipment - net $ 2,871 Goodwill 1,092 Other intangible assets - net 161 Investments in partially-owned affiliates 453 Other noncurrent assets 611 Noncurrent assets held for sale $ 5,188 Short-term debt $ 9 Current portion of long-term debt 25 Accounts payable 1,237 Accrued compensation and benefits 125 Other current liabilities 395 Liabilities held for sale $ 1,791 Long-term debt $ 31 Pension and postretirement benefits 101 Other noncurrent liabilities 75 Noncurrent liabilities held for sale $ 207 During the third quarter of fiscal 2019, the Company determined that a business within its Global Products segment met the criteria to be classified as held for sale. The assets and liabilities of this business are presented as held for sale in the consolidated statements of financial position as of June 30, 2019. Assets and liabilities held for sale are required to be recorded at the lower of carrying value or fair value less any costs to sell. Accordingly, the Company recorded an impairment charge of $235 million within restructuring and impairment costs in the consolidated statements of income in the third quarter of fiscal 2019 to write down the carrying value of the assets held for sale to fair value less any costs to sell. Refer to Note 17, "Impairment of Long-Lived Assets" of the notes to consolidated financial statements for further information regarding the impairment charge. The divestiture of the business held for sale could result in a gain or loss on sale to the extent the ultimate selling price differs from the current carrying value of the net assets recorded. The business did not meet the criteria to be classified as a discontinued operation as the divestiture of the business will not have a major effect on the Company's operations and financial results.

Revenue Recognition (Notes)

Revenue Recognition (Notes)	9 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Revenue Recognition The Company designs, manufactures and installs building products and systems around the world, including HVAC equipment, HVAC controls, energy-management systems, security systems, fire detection systems and fire suppression solutions. The Company also provides energy efficiency solutions and technical services, including inspection, scheduled maintenance, and repair and replacement of mechanical and control systems. The Company recognizes revenue from certain long-term contracts to design, manufacture and install building products and systems as well as unscheduled repair or replacement services on an over time basis, with progress towards completion measured using a cost-to-cost input method based on the relationship between actual costs incurred and total estimated costs at completion. The cost-to-cost input method is used as it best depicts the transfer of control to the customer that occurs as the Company incurs costs. Changes to the original estimates may be required during the life of the contract and such estimates are reviewed monthly. If contract modifications result in additional goods or services that are distinct from those transferred before the modification, they are accounted for prospectively as if the Company entered into a new contract. If the goods or services in the modification are not distinct from those in the original contract, sales and gross profit are adjusted using the cumulative catch-up method for revisions in estimated total contract costs and contract values. Estimated losses are recorded when identified. The Company elected the practical expedient which permits the promised amount of consideration to not be adjusted for the effects of a significant financing component as at contract inception the Company expects to receive the payment within the twelve months of transfer of goods or services. The Company enters into extended warranties and long-term service and maintenance agreements with certain customers. For these arrangements, revenue is recognized over time on a straight-line basis over the respective contract term. The Company also sells certain HVAC and refrigeration products and services in bundled arrangements with multiple performance obligations, such as equipment, commissioning, service labor and extended warranties. Approximately four to twelve months separate the timing of the first deliverable until the last piece of equipment is delivered, and there may be extended warranty arrangements with duration of one to five years commencing upon the end of the standard warranty period. In addition, the Company sells security monitoring systems that may have multiple performance obligations, including equipment, installation, monitoring services and maintenance agreements. Revenues associated with sale of equipment and related installations are recognized over time on a cost-to-cost input method, while the revenue for monitoring and maintenance services are recognized over time as services are rendered. The transaction price is allocated to each performance obligation based on the relative selling price method. In order to estimate relative selling price, market data and transfer price studies are utilized. If the standalone selling price is not directly observable, the Company estimates the standalone selling price using an adjusted market assessment approach or expected cost plus margin approach. Revenue recognized for security monitoring equipment and installation is limited to the lesser of their allocated amounts under the estimated selling price hierarchy or the non-contingent up-front consideration received at the time of installation, since collection of future amounts under the arrangement with the customer is contingent upon the delivery of monitoring and maintenance services. For transactions in which the Company retains ownership of the subscriber system asset, fees for monitoring and maintenance services are recognized over time on a straight-line basis over the contract term. Non-refundable fees received in connection with the initiation of a monitoring contract, along with associated direct and incremental selling costs, are deferred and amortized over the estimated life of the contract. In all other cases, the Company recognizes revenue at the point in time when control over the goods or services transfers to the customer. The Company considers the contractual consideration payable by the customer and assess variable consideration that may affect the total transaction price, including discounts, rebates, refunds, credits or other similar sources of variable consideration, when determining the transaction price of each contract. The Company includes variable consideration in the estimated transaction price when it is probable that significant reversal of revenue recognized would not occur when the uncertainty associated with variable consideration is subsequently resolved. These estimates are based on the amount of consideration that the Company expects to be entitled to. Shipping and handling costs billed to customers are included in sales and the related costs are included in cost of sales when control transfers to the customer. The Company has elected to present amounts collected from customers for sales and other taxes net of the related amounts remitted. Disaggregated Revenue The following table presents the Company's revenues disaggregated by segment and by product versus services revenue for the three and nine months ended June 30, 2019 (in millions): Three Months Ended Nine Months Ended Products & Systems Services Total Products & Systems Services Total Building Solutions North America $ 1,494 $ 833 $ 2,327 $ 4,202 $ 2,428 $ 6,630 Building Solutions EMEA/LA 464 458 922 1,297 1,410 2,707 Building Solutions Asia Pacific 427 264 691 1,134 798 1,932 Global Products 2,511 — 2,511 6,425 — 6,425 Total $ 4,896 $ 1,555 $ 6,451 $ 13,058 $ 4,636 $ 17,694 The following table presents further disaggregation of Global Products segment revenues by product type for the three and nine months ended June 30, 2019 (in millions): Three Months Ended June 30, Nine Months Ended 2019 2019 Building Management $ 342 $ 943 HVAC & Refrigeration Equipment 1,869 4,628 Specialty 300 854 Total Global Products $ 2,511 $ 6,425 Contract Balances Contract assets relate to the Company’s right to consideration for performance obligations satisfied but not billed and consist of unbilled receivable and costs in excess of billings. Contract liabilities relate to customer payments received in advance of satisfaction of performance obligations under the contract. Contract liabilities consist of deferred revenue. Contract balances are classified as assets or liabilities on a contract-by-contract basis at the end of each reporting period. The following table presents the location and amount of contract balances in the Company's consolidated statements of financial position (in millions): Location of contract balances June 30, 2019 October 1, 2018 Contract assets - current Accounts receivable - net $ 1,428 $ 1,261 Contract assets - noncurrent Other noncurrent assets 85 85 Contract liabilities - current Deferred revenue (1,389 ) (1,335 ) Contract liabilities - noncurrent Other noncurrent liabilities (125 ) (113 ) Total $ (1 ) $ (102 ) For the three and nine months ended June 30, 2019 , the Company recognized revenue of $130 million and $1,056 million , respectively, that was included in the beginning of period contract liability balance. Performance Obligations A performance obligation is a distinct good, service, or a bundle of goods and services promised in a contract. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. When contracts with customers require significant and complex integration, contain goods or services which are highly interdependent or interrelated, or are goods or services which significantly modify or customize other promises in the contracts and, therefore, are not distinct, then the entire contract is accounted for as a single performance obligation. For any contracts with multiple performance obligations, the contract’s transaction price is allocated to each performance obligation based on the estimated relative standalone selling price of each distinct good or service in the contract. For product sales, each product sold to a customer typically represents a distinct performance obligation. Performance obligations are satisfied as of a point in time or over time. Performance obligations are supported by contracts with customers, providing a framework for the nature of the distinct goods, services, or bundle of goods and services. The timing of satisfying the performance obligation is typically indicated by the terms of the contract. As of June 30, 2019 , the aggregate amount of the transaction price allocated to remaining performance obligations was approximately $14.2 billion , of which approximately 60% is expected to be recognized as revenue over the next two years. The remaining performance obligations expected to be recognized in revenue beyond two years primarily relate to large, multi-purpose contracts to construct hospitals, schools and other governmental buildings, which include services to be performed over the building's lifetime, with initial contract terms of 25 to 35 years. Future contract modifications could affect both the timing and the amount of the remaining performance obligations. The Company has applied the practical expedient for certain revenue streams to exclude the value of remaining performance obligations for contracts with an original expected duration of one year or less. Costs to Obtain or Fulfill a Contract The Company recognizes the incremental costs incurred to obtain or fulfill a contract with a customer as an asset when these costs are recoverable. These costs consist primarily of sales commissions and bid/proposal costs. Costs to obtain or fulfill a contract are capitalized and amortized to revenue over the period of contract performance. As of June 30, 2019 , the Company recorded the costs to obtain or fulfill a contract of $190 million , of which $100 million is recorded within other current assets and $90 million is recorded within other noncurrent assets in the consolidated statements of financial position. During the three and nine months ended June 30, 2019 , the Company recognized amortization expense of $50 million and $119 million , respectively related to costs to obtain or fulfill a contract. There were no impairment losses recognized in the three and nine months ended June 30, 2019

Inventories

Inventories	9 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories consisted of the following (in millions): June 30, 2019 September 30, 2018 Raw materials and supplies $ 685 $ 606 Work-in-process 215 155 Finished goods 1,150 1,058 Inventories $ 2,050 $ 1,819

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets (Notes)	9 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS	Goodwill and Other Intangible Assets The changes in the carrying amount of goodwill in each of the Company’s reportable segments for the nine month period ended June 30, 2019 were as follows (in millions): Business Acquisitions Business Divestitures Currency Translation and Other September 30, June 30, 2018 2019 Building Solutions North America $ 9,603 $ — $ — $ (5 ) $ 9,598 Building Solutions EMEA/LA 1,950 1 (1 ) (40 ) 1,910 Building Solutions Asia Pacific 1,235 — — (9 ) 1,226 Global Products 5,593 9 (22 ) (2 ) 5,578 Total $ 18,381 $ 10 $ (23 ) $ (56 ) $ 18,312 The fiscal 2019 Global Products business divestiture amount includes $22 million of goodwill transferred to noncurrent assets held for sale on the consolidated statements of financial position related to plans to dispose of a business within the Global Products segment. At September 30, 2018 , accumulated goodwill impairment charges included $47 million related to the Building Solutions EMEA/LA - Latin America reporting unit. The Company’s other intangible assets, primarily from business acquisitions valued based on independent appraisals, consisted of (in millions): June 30, 2019 September 30, 2018 Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Amortized intangible assets Technology $ 1,316 $ (342 ) $ 974 $ 1,317 $ (251 ) $ 1,066 Customer relationships 2,745 (714 ) 2,031 2,941 (599 ) 2,342 Miscellaneous 566 (228 ) 338 458 (185 ) 273 Total amortized intangible assets 4,627 (1,284 ) 3,343 4,716 (1,035 ) 3,681 Unamortized intangible assets Trademarks/trade names 2,306 — 2,306 2,386 — 2,386 Miscellaneous 90 — 90 120 — 120 2,396 — 2,396 2,506 — 2,506 Total intangible assets $ 7,023 $ (1,284 ) $ 5,739 $ 7,222 $ (1,035 ) $ 6,187 Amortization of other intangible assets included within continuing operations for the three month periods ended June 30, 2019 and 2018 was $93 million and $98 million , respectively. Amortization of other intangible assets included within continuing operations for the nine month periods ended June 30, 2019 and 2018 was $288 million and $282 million , respectively. Excluding the impact of any future acquisitions, the Company anticipates amortization for fiscal 2020, 2021, 2022, 2023 and 2024 will be approximately $399 million , $389 million , $378 million , $365 million and $352 million per year, respectively.

Significant Restructuring Costs

Significant Restructuring Costs	9 Months Ended
	Jun. 30, 2019
Restructuring Charges [Abstract]
Significant Restructuring and Impairment Costs	Significant Restructuring and Impairment Costs To better align its resources with its growth strategies and reduce the cost structure of its global operations in certain underlying markets, the Company commits to restructuring plans as necessary. In fiscal 2018, the Company committed to a significant restructuring plan (2018 Plan) and recorded $255 million of restructuring and impairment costs for continuing operations in the consolidated statements of income. This was 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 Building Technologies & Solutions businesses and at Corporate. The costs consist primarily of workforce reductions, plant closures and asset impairments. Of the restructuring and impairment costs recorded, $113 million related to the Global Products segment, $56 million related to the Building Solutions EMEA/LA segment, $50 million related to Corporate, $20 million related to the Building Solutions North America segment and $16 million related to the Building Solutions Asia Pacific segment. The restructuring actions are expected to be substantially complete in 2020. Additionally, the Company recorded $8 million of restructuring and impairment costs related to Power Solutions in fiscal 2018. This is reported within discontinued operations. The following table summarizes the changes in the Company’s 2018 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 Total Original reserve $ 209 $ 42 $ 12 $ 263 Utilized—cash (45 ) — (2 ) (47 ) Utilized—noncash — (42 ) — (42 ) Balance at September 30, 2018 $ 164 $ — $ 10 $ 174 Utilized—cash (59 ) — (5 ) (64 ) Transfer to liabilities held for sale (4 ) — — (4 ) Balance at June 30, 2019 $ 101 $ — $ 5 $ 106 In fiscal 2017, the Company committed to a significant restructuring plan (2017 Plan) and recorded $347 million of restructuring and impairment costs for continuing operations in the consolidated statements of income. This was 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 Building Technologies & Solutions businesses and at Corporate. The costs consist primarily of workforce reductions, plant closures and asset impairments. Of the restructuring and impairment costs recorded, $166 million related to Corporate, $74 million related to the Building Solutions EMEA/LA segment, $59 million related to the Building Solutions North America segment, $32 million related to the Global Products segment and $16 million related to the Building Solutions Asia Pacific segment. The restructuring actions are expected to be substantially complete in fiscal 2019. Additionally, the Company recorded $20 million of restructuring and impairment costs related to Power Solutions in fiscal 2017. This is reported within discontinued operations. The following table summarizes the changes in the Company’s 2017 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 $ 276 $ 77 $ 14 $ — $ 367 Utilized—cash (75 ) — — — (75 ) Utilized—noncash — (77 ) (1 ) — (78 ) Adjustment to restructuring reserves 25 — — — 25 Balance at September 30, 2017 $ 226 $ — $ 13 $ — $ 239 Utilized—cash (152 ) — (6 ) — (158 ) Utilized—noncash — — — (1 ) (1 ) Balance at September 30, 2018 $ 74 $ — $ 7 $ (1 ) $ 80 Utilized—cash (5 ) — (1 ) — (6 ) Utilized—noncash — — — (2 ) (2 ) Transfer to liabilities held for sale (3 ) — — — (3 ) Balance at June 30, 2019 $ 66 $ — $ 6 $ (3 ) $ 69 In fiscal 2016, the Company committed to a significant restructuring plan (2016 Plan) and recorded $222 million of restructuring and impairment costs for continuing operations in the consolidated statements of income. This was 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 Building Technologies & Solutions businesses and at Corporate. The costs consist primarily of workforce reductions, plant closures, asset impairments and change-in-control payments. Of the restructuring and impairment costs recorded, $161 million related to Corporate, $44 million related to the Global Products segment and $17 million related to the Building Solutions EMEA/LA segment. The restructuring actions are expected to be substantially complete in fiscal 2019. Included in the reserve is $56 million of committed restructuring actions taken by Tyco for liabilities assumed as part of the Tyco acquisition. Additionally, the Company recorded $398 million of restructuring and impairment costs related to Adient and Power Solutions in fiscal 2016. This is reported within discontinued operations. 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 $ 368 $ 190 $ 62 $ — $ 620 Acquired Tyco restructuring reserves 78 — — — 78 Utilized—cash (32 ) — — — (32 ) Utilized—noncash — (190 ) (32 ) 1 (221 ) Balance at September 30, 2016 $ 414 $ — $ 30 $ 1 $ 445 Adient spin-off impact (194 ) — (22 ) — (216 ) Utilized—cash (86 ) — (2 ) — (88 ) Utilized—noncash — — — 1 1 Adjustment to restructuring reserves (25 ) — — — (25 ) Transfer to liabilities held for sale (3 ) — — — (3 ) Adjustment to acquired Tyco restructuring reserves (22 ) — — — (22 ) Balance at September 30, 2017 $ 84 $ — $ 6 $ 2 $ 92 Utilized—cash (17 ) — (2 ) — (19 ) Balance at September 30, 2018 $ 67 $ — $ 4 $ 2 $ 73 Utilized—cash (14 ) — — — (14 ) Balance at June 30, 2019 $ 53 $ — $ 4 $ 2 $ 59 The Company's fiscal 2018, 2017 and 2016 restructuring plans included workforce reductions of approximately 11,300 employees ( 9,100 for the Building Technologies & Solutions business and 2,200 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 June 30, 2019 , approximately 5,200 of the employees have been separated from the Company pursuant to the restructuring plans. In addition, the restructuring plans included twelve plant closures in the Building Technologies & Solutions business. As of June 30, 2019 , ten of the twelve plants have been closed.

Income Taxes

Income Taxes	9 Months Ended
	Jun. 30, 2019
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. The statutory tax rate in Ireland is being used as a comparison since the Company is domiciled in Ireland. For the three months ended June 30, 2019 , the Company's effective tax rate for continuing operations was 52% and was higher than the statutory tax rate of 12.5% primarily due to a discrete tax charge related to newly enacted regulations related to U.S. Tax Reform, non-U.S. tax audit reserve adjustments and tax rate differentials, partially offset by a tax indemnification reserve release, the tax benefits of an asset held for sale impairment charge and continuing global tax planning initiatives. For the nine months ended June 30, 2019 , the Company's effective tax rate for continuing operations was 38% and was higher than the statutory tax rate of 12.5% primarily due to valuation allowance adjustments as a result of tax law changes, a discrete tax charge related to newly enacted regulations related to U.S. Tax Reform, non-U.S. tax audit reserve adjustments and tax rate differentials, partially offset by a tax indemnification reserve release, the tax benefits of an asset held for sale impairment charge and continuing global tax planning initiatives. For the three months ended June 30, 2018 , the Company's effective tax rate for continuing operations was 10% and was lower than the statutory tax rate of 12.5% primarily due to the benefits of continuing global tax planning initiatives. For the nine months ended June 30, 2018 , the Company's effective tax rate for continuing operations was 30% and was higher than the statutory tax rate of 12.5% primarily due to the discrete net impacts of U.S. Tax Reform, the tax impact of the divestiture of the Scott Safety business and tax rate differentials, partially offset by the benefits of continuing global tax planning initiatives and tax audit closures. 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. In the first quarter of fiscal 2019, as a result of changes to U.S. tax law, the Company recorded a discrete tax charge of $76 million related to valuation allowances on certain U.S. deferred tax assets. Uncertain Tax Positions At September 30, 2018 , the Company had gross tax effected unrecognized tax benefits of $2,358 million , of which $2,225 million , if recognized, would impact the effective tax rate. Total net accrued interest at September 30, 2018 was approximately $119 million (net of tax benefit). The interest and penalties accrued during the nine months ended June 30, 2019 was approximately $49 million (net of tax benefit). Interest and penalties accrued during the nine months ended June 30, 2018 were immaterial. The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income tax expense. In the third quarter of fiscal 2019, the Company recorded a discrete charge of $199 million related to newly enacted regulations related to U.S. Tax Reform which impacted the Company's reserves for uncertain tax positions. In the third quarter of fiscal 2019, the Company recorded a discrete charge of $27 million related to non-U.S. tax examinations. In the first quarter of fiscal 2018, tax audit resolutions resulted in a $25 million net benefit to income tax expense. In the U.S., fiscal years 2015 through 2016 are currently under exam by the Internal Revenue Service ("IRS") for certain legal entities. Additionally, the Company is currently under exam in the following major non-U.S. jurisdictions: Tax Jurisdiction Tax Years Covered Belgium 2015 - 2017 China 2008 - 2016 France 2010 - 2012; 2015 - 2016 Germany 2007 - 2016 Japan 2015 - 2018 United Kingdom 2012 - 2015 It is reasonably possible that certain tax examinations and/or tax litigation will conclude within the next twelve months, which could have a material impact on tax expense. Based upon the circumstances surrounding these examinations, the impact is not currently quantifiable. Impacts of Tax Legislation On December 22, 2017, the “Tax Cuts and Jobs Act” (H.R. 1) was enacted and significantly revised U.S. corporate income tax by, among other things, lowering corporate income tax rates, imposing a one-time transition tax on deemed repatriated earnings of non-U.S. subsidiaries, and implementing a territorial tax system and various base erosion minimum tax provisions. In connection with the Company’s analysis of the impact of the U.S. tax law changes, the Company recorded a provisional net tax charge of $108 million during fiscal 2018 consistent with guidance prescribed by Staff Accounting Bulletin 118. This provisional net tax charge arises from a benefit of $108 million due to the remeasurement of U.S. deferred tax assets and liabilities, offset by the Company’s tax charge relating to the one-time transition tax on deemed repatriated earnings, inclusive of all relevant taxes, of $216 million . The Company’s estimated benefit of the remeasurement of U.S. deferred tax assets and liabilities increased from $101 million as of December 31, 2017 to $108 million as of September 30, 2018 due to calculation refinement of the Company’s estimated impact. The Company remeasured certain deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future, which is generally 21% or the blended fiscal 2018 rate of 24.5% . The Company’s tax charge for transition tax decreased from $305 million as of December 31, 2017 to $216 million as of September 30, 2018 due to further analysis of the Company’s post-1986 non-U.S. earnings and profits (“E&P”) previously deferred from U.S. federal taxation and refinement of the estimated impact of tax law changes. In the first quarter of fiscal 2019, the Company completed its analysis of all enactment-date income tax effects of the U.S. tax law change with no further adjustment to the provisional amounts recorded as of September 30, 2018. During the nine months ended June 30, 2019 and 2018 , 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 third quarter of fiscal 2019, the Company recorded a $235 million impairment charge related to assets held for sale. Refer to Note 17, "Impairment of Long-Lived Assets," of the notes to consolidated financial statements for further information regarding the impairment charge. The impairment charge generated a $53 million tax benefit. In the third quarter of fiscal 2019, the Company released a $226 million tax indemnification reserve. Refer to Note 19, "Guarantees," of the notes to consolidated financial statements for further information regarding the reserve release. The reserve release generated no income tax expense. In the first quarter of fiscal 2018, the Company completed the sale of its Scott Safety business to 3M Company. Refer to Note 3, "Acquisitions and Divestitures," of the notes to consolidated financial statements for additional information. In connection with the sale, the Company recorded a pre-tax gain of $114 million and income tax expense of $30 million . In the first quarter of fiscal 2018, the Company recorded $154 million of significant restructuring and impairment costs. Refer to Note 8, "Significant Restructuring and Impairment Costs," of the notes to consolidated financial statements for additional information. The restructuring costs generated a $23 million tax benefit, which reflects the Company’s current tax position in these jurisdictions.

Pension and Postretirement Plan

Pension and Postretirement Plans	9 Months Ended
	Jun. 30, 2019
Defined Benefit Plan [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, which are primarily recorded in selling, general and administrative expenses in the consolidated statements of income, are shown in the tables below in accordance with ASC 715, "Compensation – Retirement Benefits" (in millions): U.S. Pension Plans Three Months Ended June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Service cost $ — $ — $ — $ 1 Interest cost 25 23 75 69 Expected return on plan assets (46 ) (49 ) (138 ) (149 ) Net periodic benefit credit $ (21 ) $ (26 ) $ (63 ) $ (79 ) Non-U.S. Pension Plans Three Months Ended June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Service cost $ 5 $ 6 $ 16 $ 17 Interest cost 14 14 40 42 Expected return on plan assets (26 ) (29 ) (78 ) (86 ) Settlement loss — — 1 — Net periodic benefit credit $ (7 ) $ (9 ) $ (21 ) $ (27 ) Postretirement Benefits Three Months Ended June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Service cost $ — $ — $ 1 $ 1 Interest cost 2 1 5 4 Expected return on plan assets (2 ) (2 ) (7 ) (7 ) Net periodic benefit credit $ — $ (1 ) $ (1 ) $ (2 )

Debt and Financing Arrangements

Debt and Financing Arrangements	9 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Debt and Financing Arrangements	Debt and Financing Arrangements In June 2019, TSarl, a subsidiary of the Company, terminated its $1.25 billion committed revolving credit facility scheduled to expire in August 2020. In connection with the termination, the Company repaid all of the outstanding obligations in respect of principal, interest and fees under the credit facility. In relation to the termination of the credit facility, TSarl completed all of its obligations under the Term Loan Credit Agreement, dated as of March 10, 2016 (the "Term Facility") by repaying all of the outstanding obligations under the term facility, which included $364 million term loan scheduled to mature in March 2020. Other debt held at TSarl as of March 31, 2019 was also repaid, including a 364 -day $250 million floating rate term loan scheduled to mature in March 2020 and an 18-month 215 million euro floating rate euro term loan scheduled to mature in July 2019. No amounts remain outstanding on the $4.0 billion TSarl merger-related debt as of June 30, 2019. In June 2019, the Company repurchased at par, $2.5 million of its 5.25% fixed rate notes, plus accrued interest, scheduled to mature in 2041. In May 2019, the Company completed the debt tender offer to purchase up to $1.5 billion in aggregate principal amount of certain of its outstanding notes for $1.6 billion total consideration. The Company recognized a loss on the extinguishment of debt of $60 million , which was recorded within net financing charges in the consolidated statements of income. In May 2019, the Company repaid 10 billion yen of the 35 billion yen five-year syndicated floating rate term loan, plus accrued interest, scheduled to mature in September 2022. In April 2019, the Company repurchased at a discount, 4.7 million euro of its 1.375% fixed rate euro notes, plus accrued interest, scheduled to mature in 2025. In March 2019, a 364 -day $250 million committed revolving credit facility expired. The Company entered into a new $250 million committed revolving credit facility scheduled to expire in March 2020. As of June 30, 2019 there were no draws on the facility. In February 2019, the Company repurchased at a discount, $12 million of its 3.9% fixed rate notes, plus accrued interest, scheduled to mature in 2026. In February 2019, a 364 -day $150 million committed revolving credit facility expired. The Company entered into a new $150 million committed revolving credit facility scheduled to expire in February 2020. As of June 30, 2019 there were no draws on the facility. In February 2019, a 364 -day $150 million committed revolving credit facility expired. The Company entered into a new $150 million committed revolving credit facility scheduled to expire in February 2020. As of June 30, 2019 there were no draws on the facility. In January 2019, the Company entered into a $750 million term loan due the earlier of January 2020 or five business days from the closing on the sale of the Power Solutions business. Proceeds from the term loan were used for general corporate purposes. Following the sale of the Power Solutions business, the loan was repaid in May 2019. In January 2019, a 364 -day $200 million committed revolving credit facility expired. The Company entered into a new $350 million committed revolving credit facility scheduled to expire in January 2020. As of June 30, 2019 there were no draws on the facility. Net Financing Charges The Company's net financing charges line item in the consolidated statements of income for the three and nine months ended June 30, 2019 and 2018 contained the following components (in millions): Three Months Ended June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Interest expense, net of capitalized interest costs $ 81 $ 106 $ 269 $ 307 Banking fees and bond cost amortization 7 8 20 23 Loss on debt extinguishment 60 — 60 — Interest income (28 ) (5 ) (41 ) (13 ) Net foreign exchange results for financing activities (1 ) (14 ) (6 ) (13 ) Net financing charges $ 119 $ 95 $ 302 $ 304

Stock-Based Compensation (Notes

Stock-Based Compensation (Notes)	9 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation During September 2016, the Board of Directors of the Company approved amendments to the Johnson Controls International plc 2012 Share and Incentive Plan (the "Plan"). The types of awards authorized by the Plan comprise of stock options, stock appreciation rights, performance shares, performance units and other stock-based compensation awards. The Compensation Committee of the Company's Board of Directors determines the types of awards to be granted to individual participants and the terms and conditions of the awards. Awards are typically granted annually in the Company’s fiscal first quarter. A summary of the stock-based awards granted during the nine month periods ended June 30, 2019 and 2018 is presented below: Nine Months Ended June 30, 2019 2018 Number Granted Weighted Average Grant Date Fair Value Number Granted Weighted Average Grant Date Fair Value Stock options 1,741,510 $ 5.56 1,376,807 $ 7.04 Restricted stock/units 2,334,423 33.50 2,188,131 37.26 Performance shares 583,989 36.28 496,478 36.31 Stock Options Stock options are granted with an exercise price equal to the market price of the Company’s stock at the date of grant. Stock option awards typically vest between two and three years after the grant date and expire ten years from the grant date. The fair value of each option is estimated on the date of grant using a Black-Scholes option valuation model that uses the assumptions noted in the following table. The expected life of options represents the period of time that options granted are expected to be outstanding, assessed separately for executives and non-executives. The risk-free interest rate for periods during the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. For fiscal 2019 and fiscal 2018, the expected volatility is based on the historical volatility of the Company’s stock since October 2016 blended with the historical volatility of certain peer companies’ stock prior to October 2016 over the most recent period corresponding to the expected life as of the grant date. The expected dividend yield is based on the expected annual dividend as a percentage of the market value of the Company’s ordinary shares as of the grant date. The Company uses historical data to estimate option exercises and employee terminations within the valuation model. Nine Months Ended 2019 2018 Expected life of option (years) 6.4 6.5 Risk-free interest rate 2.77% 2.28% Expected volatility of the Company’s stock 21.8% 23.7% Expected dividend yield on the Company’s stock 3.29% 2.78% Restricted (Nonvested) Stock / Units The Plan provides for the award of restricted stock or restricted stock units to certain employees. These awards are typically share settled unless the employee is a non-U.S. employee or elects to defer settlement until retirement at which point the award would be settled in cash. Restricted awards typically vest over a period of three years from the grant date. The Plan allows for different vesting terms on specific grants with approval by the Board of Directors. The fair value of each share-settled restricted award is based on the closing market value of the Company’s ordinary shares on the date of grant. The fair value of each cash-settled restricted award is recalculated at the end of each reporting period based on the closing market value of the Company's ordinary shares at the end of the reporting period, and the liability and expense are adjusted based on the new fair value. Performance Share Awards The Plan permits the grant of performance-based share unit ("PSU") awards. The PSUs are generally contingent on the achievement of pre-determined performance goals over a performance period of three years as well as on the award holder's continuous employment until the vesting date. The PSUs are also indexed to the achievement of specified levels of total shareholder return versus a peer group over the performance period. Each PSU that is earned will be settled with shares of the Company's ordinary shares following the completion of the performance period, unless the award holder elected to defer a portion or all of the award until retirement which would then be settled in cash. The fair value of each PSU is estimated on the date of grant with the use of a Monte Carlo simulation that uses the assumptions noted in the following table. The risk-free interest rate for periods during the contractual life of the PSU is based on the U.S. Treasury yield curve in effect at the time of grant. For fiscal 2019 and fiscal 2018, the expected volatility is based on the historical volatility of the Company’s stock since October 2016 blended with the historical volatility of certain peer companies’ stock prior to October 2016 over the most recent three-year period as of the grant date. Nine Months Ended 2019 2018 Risk-free interest rate 2.76% 1.92% Expected volatility of the Company’s stock 22.9% 21.7%

Earnings Per Share

Earnings Per Share	9 Months Ended
	Jun. 30, 2019
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 by the weighted average number of ordinary shares outstanding during the reporting period. Diluted EPS is calculated by dividing net income attributable to Johnson Controls by the weighted average number of ordinary shares and ordinary 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 ordinary shares 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 and compensation cost for future service that the Company has not yet recognized. For unvested restricted stock and unvested performance share awards, assumed proceeds under the treasury stock method would include unamortized compensation cost. The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share (in millions): Three Months Ended June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Income Available to Ordinary Shareholders Income from continuing operations $ 141 $ 474 $ 488 $ 583 Income from discontinued operations 4,051 249 4,574 808 Basic and diluted income available to shareholders $ 4,192 $ 723 $ 5,062 $ 1,391 Weighted Average Shares Outstanding Basic weighted average shares outstanding 870.9 925.6 898.4 926.0 Effect of dilutive securities: Stock options, unvested restricted stock and unvested performance share awards 4.3 5.1 3.8 6.1 Diluted weighted average shares outstanding 875.2 930.7 902.2 932.1 Antidilutive Securities Options to purchase shares 0.7 2.1 1.9 1.5 During the three months ended June 30, 2019 and 2018 , the Company declared dividends of $0.26 per share. During the nine months ended June 30, 2019 and 2018 , the Company declared dividends of $0.78 per 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	9 Months Ended
	Jun. 30, 2019
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 and noncontrolling interests (in millions, net of tax): Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Equity Attributable to Johnson Controls International plc Equity Attributable to Noncontrolling Interests Total Equity Equity Attributable to Johnson Controls International plc Equity Attributable to Noncontrolling Interests Total Equity Beginning balance, March 31, $ 20,036 $ 1,265 $ 21,301 $ 20,874 $ 1,006 $ 21,880 Total comprehensive income: Net income 4,192 84 4,276 723 71 794 Foreign currency translation adjustments (90 ) (4 ) (94 ) (557 ) (44 ) (601 ) Realized and unrealized gains (losses) on derivatives (5 ) (4 ) (9 ) 3 (1 ) 2 Other comprehensive loss (95 ) (8 ) (103 ) (554 ) (45 ) (599 ) Comprehensive income 4,097 76 4,173 169 26 195 Other changes in equity: Cash dividends—ordinary shares (208 ) — (208 ) (240 ) — (240 ) Repurchases and retirements of ordinary shares (4,122 ) — (4,122 ) (56 ) — (56 ) Change in noncontrolling interest share — — — — 4 4 Divestiture of Power Solutions 483 (295 ) 188 — — — Other, including options exercised 77 — 77 26 — 26 Ending balance, June 30 $ 20,363 $ 1,046 $ 21,409 $ 20,773 $ 1,036 $ 21,809 Nine Months Ended June 30, 2019 Nine Months Ended June 30, 2018 Equity Attributable to Johnson Controls International plc Equity Attributable to Noncontrolling Interests Total Equity Equity Attributable to Johnson Controls International plc Equity Attributable to Noncontrolling Interests Total Equity Beginning balance, September 30, $ 21,164 $ 1,294 $ 22,458 $ 20,447 $ 920 $ 21,367 Total comprehensive income: Net income 5,062 171 5,233 1,391 132 1,523 Foreign currency translation adjustments (103 ) 8 (95 ) (331 ) 3 (328 ) Realized and unrealized gains (losses) on derivatives 10 — 10 (2 ) 1 (1 ) Realized and unrealized losses on marketable securities — — — (2 ) — (2 ) Other comprehensive income (loss) (93 ) 8 (85 ) (335 ) 4 (331 ) Comprehensive income 4,969 179 5,148 1,056 136 1,192 Other changes in equity: Cash dividends—ordinary shares (683 ) — (683 ) (722 ) — (722 ) Dividends attributable to noncontrolling interests — (132 ) (132 ) — (43 ) (43 ) Repurchases and retirements of ordinary shares (5,122 ) — (5,122 ) (255 ) — (255 ) Change in noncontrolling interest share — — — — 23 23 Divestiture of Power Solutions 483 (295 ) 188 — — — Adoption of ASC 606 (45 ) — (45 ) — — — Adoption of ASU 2016-16 (546 ) — (546 ) — — — Adoption of ASU 2016-09 — — — 179 — 179 Other, including options exercised 143 — 143 68 — 68 Ending balance, June 30 $ 20,363 $ 1,046 $ 21,409 $ 20,773 $ 1,036 $ 21,809 As previously disclosed, during the quarter ended December 31, 2018, the Company adopted ASC 606, "Revenue from Contracts with Customers." As a result, the Company recorded $45 million to beginning retained earnings, which relates primarily to deferred revenue recorded for the Power Solutions business for certain battery core returns that represent a material right provided to customers. As previously disclosed, during the quarter ended December 31, 2018, the Company adopted ASU 2016-16, "Accounting for Income Taxes: Intra-Entity Asset Transfers of Assets Other Than Inventory." As a result, the Company recognized deferred taxes of $546 million related to the tax effects of all intra-entity sales of assets other than inventory on a modified retrospective basis through a cumulative-effect adjustment to retained earnings as of October 1, 2018. As previously disclosed, during the quarter ended December 31, 2017, the Company adopted ASU No. 2016-09, "Compensation - Stock Compensation (Topic 718) Improvements to Employee Share-Based Payment Accounting." As a result, the Company recognized deferred tax assets of $179 million related to certain operating loss carryforwards resulting from the exercise of employee stock options and restricted stock vestings on a modified retrospective basis through a cumulative-effect adjustment to retained earnings as of October 1, 2017. Following the Tyco Merger, the Company adopted, subject to the ongoing existence of sufficient distributable reserves, the existing Tyco International plc $1 billion share repurchase program in September 2016. In December 2017, the Company's Board of Directors approved a $1 billion increase to its share repurchase authorization. In November 2018, the Company's Board of Directors approved an additional $1 billion increase to its share repurchase authorization. In March 2019, the Company's Board of Directors approved an additional $8.5 billion increase to its share repurchase authorization, subject to the completion of the previously announced sale of the Company's Power Solutions business, which closed on April 30, 2019. 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. On May 1, 2019, the Company announced a "modified Dutch auction" tender offer for up to $4.0 billion of its ordinary shares with a price range between $36.00 and $40.00 per share. The tender offer expired on May 31, 2019. Through the tender offer, the Company accepted for payment 102 million shares at a purchase price of $39.25 per share, for a total of approximately $4,035 million , including fees and commissions. The shares purchased through the tender offer were immediately retired. Ordinary shares were reduced by the number of shares retired at $0.01 par value per share. The excess purchase price over par value was recorded in retained earnings in the consolidated statements of financial position. In addition to the equity tender offer described above, the Company repurchased $87 million and $1,087 million of its ordinary shares, respectively, during the three and nine months ended June 30, 2019 . For the three and nine months ended June 30, 2018 , the Company repurchased $56 million and $255 million of its ordinary shares, respectively. As of June 30, 2019 , approximately $5.4 billion remains available under the share repurchase program. 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. Beginning in the fourth quarter of fiscal 2018, the Company does not have any subsidiaries for which the noncontrolling interest party has within their control the right to require the Company to redeem any portion of its interests. The following schedule present changes in the redeemable noncontrolling interests for the three and nine months ended June 30, 2018 (in millions): Three Months Ended June 30, 2018 Beginning balance, March 31, 2018 $ 235 Net income 10 Foreign currency translation adjustments (13 ) Realized and unrealized losses on derivatives (1 ) Ending balance, June 30, 2018 $ 231 Nine Months Ended June 30, 2018 Beginning balance, September 30, 2017 $ 211 Net income 35 Foreign currency translation adjustments (3 ) Realized and unrealized losses on derivatives (9 ) Dividends (3 ) Ending balance, June 30, 2018 $ 231 The following schedules present changes in accumulated other comprehensive income ("AOCI") attributable to Johnson Controls (in millions, net of tax): Three Months Ended June 30, 2019 2018 Foreign currency translation adjustments ("CTA") Balance at beginning of period $ (952 ) $ (255 ) Divestiture of Power Solutions 479 — Aggregate adjustment for the period (net of tax effect of $0) (90 ) (557 ) Balance at end of period (563 ) (812 ) Realized and unrealized gains (losses) on derivatives Balance at beginning of period 2 1 Divestiture of Power Solutions (net of tax effect of $1 and $0) 4 — Current period changes in fair value (net of tax effect of $(3) and $1) (4 ) 5 Reclassification to income (net of tax effect of $0 and $(2)) ** (1 ) (2 ) Balance at end of period 1 4 Realized and unrealized gains (losses) on marketable securities Balance at beginning of period — 2 Current period changes in fair value (net of tax effect of $0) — 1 Reclassification to income (net of tax effect of $0 and $(1)) — (1 ) Balance at end of period — 2 Pension and postretirement plans Balance at beginning of period (2 ) (2 ) Other changes — — Balance at end of period (2 ) (2 ) Accumulated other comprehensive loss, end of period $ (564 ) $ (808 ) Nine Months Ended June 30, 2019 2018 CTA Balance at beginning of period $ (939 ) $ (481 ) Divestiture of Power Solutions 479 — Aggregate adjustment for the period (net of tax effect of $0 and $1) * (103 ) (331 ) Balance at end of period (563 ) (812 ) Realized and unrealized gains (losses) on derivatives Balance at beginning of period (13 ) 6 Divestiture of Power Solutions (net of tax effect of $1 and $0) 4 — Current period changes in fair value (net of tax effect of $1 and $2) 4 7 Reclassification to income (net of tax effect of $3 and $(4)) ** 6 (9 ) Balance at end of period 1 4 Realized and unrealized gains (losses) on marketable securities Balance at beginning of period 8 4 Adoption of ASU 2016-01 *** (8 ) — Current period changes in fair value (net of tax effect of $0) — (1 ) Reclassification to income (net of tax effect of $(1)) **** — (1 ) Balance at end of period — 2 Pension and postretirement plans Balance at beginning of period (2 ) (2 ) Other changes — — Balance at end of period (2 ) (2 ) Accumulated other comprehensive loss, end of period $ (564 ) $ (808 ) * During the nine months ended June 30, 2018, $12 million of cumulative CTA was recognized as part of the divestiture-related gain recognized as part of the divestiture of Scott Safety. ** Refer to Note 15, "Derivative Instruments and Hedging Activities," of the notes to consolidated financial statements for disclosure of the line items in the consolidated statements of income affected by reclassifications from AOCI into income related to derivatives. *** As previously disclosed, during the quarter ended December 31, 2018, the Company adopted ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities." As a result the Company reclassified $8 million of unrealized gains on marketable securities to retained earnings as of October 1, 2018. **** During the nine months ended June 30, 2018, the Company sold certain marketable common stock for approximately $3 million . As a result, the Company recorded $2 million of realized gains within selling, general and administrative expenses.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	9 Months Ended
	Jun. 30, 2019
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. Cash Flow Hedges 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 selectively hedges anticipated transactions that are subject to foreign exchange rate risk primarily using foreign currency exchange hedge contracts. The Company hedges 70% to 90% of the nominal amount of each of its known foreign exchange transactional exposures. As cash flow hedges under ASC 815, "Derivatives and Hedging," 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. These contracts were highly effective in hedging the variability in future cash flows attributable to changes in currency exchange rates during the three and nine months ended June 30, 2019 and 2018 . 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, aluminum and polypropylene 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 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. The maturities of the commodity hedge contracts coincide with the expected purchase of the commodities. These contracts were highly effective in hedging the variability in future cash flows attributable to changes in commodity prices during the three and nine months ended June 30, 2019 and 2018 . The Company had the following outstanding contracts to hedge forecasted commodity purchases for continuing and discontinued operations (in metric tons): Volume Outstanding as of Commodity June 30, 2019 September 30, 2018 Copper 3,357 3,175 Polypropylene — 15,868 Lead — 49,066 Aluminum 4,649 3,381 Tin — 3,076 Net Investment Hedges The Company enters into foreign currency denominated debt obligations to selectively hedge portions of its net investment in non-U.S. subsidiaries. The currency effects of the debt obligations are reflected in the AOCI account within shareholders’ equity attributable to Johnson Controls ordinary shareholders where they offset currency gains and losses recorded on the Company’s net investments globally. At June 30, 2019 , the Company had 888 million euro, 750 million euro, 423 million euro and 54 million euro in bonds designated as net investment hedges in the Company's net investment in Europe and 25 billion yen of foreign denominated debt designated as net investment hedge in the Company's net investment in Japan. Also, at September 30, 2018 , the Company had one billion euro, 750 million euro, 423 million euro and 58 million euro in bonds and a 215 million euro term loan designated as net investment hedges in the Company's net investment in Europe and 35 billion yen of foreign denominated debt designated as net investment hedge in the Company's net investment in Japan. Derivatives Not Designated as Hedging Instruments 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 June 30, 2019 , the Company hedged approximately 1.4 million shares of its ordinary shares, which have a cost basis of $60 million . As of September 30, 2018 , the Company hedged approximately 1.8 million shares of its ordinary shares, which have a cost basis of $73 million . The Company also holds certain foreign currency forward contracts which do not qualify for hedge accounting treatment. The change in fair value of foreign currency exchange derivatives not designated as hedging instruments under ASC 815 are recorded in the consolidated statements of income. Fair Value of Derivative Instruments 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 June 30, September 30, June 30, September 30, 2019 2018 2019 2018 Other current assets Foreign currency exchange derivatives $ 4 $ 6 $ 6 $ 10 Commodity derivatives — 1 — — Other noncurrent assets Equity swap — — 59 63 Total assets $ 4 $ 7 $ 65 $ 73 Other current liabilities Foreign currency exchange derivatives $ 6 $ 10 $ 1 $ 2 Commodity derivatives 1 2 — — Liabilities held for sale Commodity derivatives — 12 — — Long-term debt Foreign currency denominated debt 2,640 3,149 — — Total liabilities $ 2,647 $ 3,173 $ 1 $ 2 Counterparty Credit Risk The use of derivative financial instruments exposes the Company to counterparty credit risk. The Company has established policies and procedures to limit the potential for counterparty credit risk, including establishing limits for credit exposure and continually assessing the creditworthiness of counterparties. As a matter of practice, the Company deals with major banks worldwide having strong investment grade long-term credit ratings. To further reduce the risk of loss, the Company generally enters into International Swaps and Derivatives Association ("ISDA") master netting agreements with substantially all of its counterparties. The Company's derivative contracts do not contain any credit risk related contingent features and do not require collateral or other security to be furnished by the Company or the counterparties. The Company's exposure to credit risk associated with its derivative instruments is measured on an individual counterparty basis, as well as by groups of counterparties that share similar attributes. The Company does not anticipate any non-performance by any of its counterparties, and the concentration of risk with financial institutions does not present significant credit risk to the Company. The Company enters into 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 June 30, 2019 and September 30, 2018 , 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 June 30, September 30, June 30, September 30, 2019 2018 2019 2018 Gross amount recognized $ 69 $ 80 $ 2,648 $ 3,175 Gross amount eligible for offsetting (6 ) (12 ) (6 ) (12 ) Net amount $ 63 $ 68 $ 2,642 $ 3,163 Derivatives Impact on the Statements of Income and Statements of Comprehensive Income The following table presents the pre-tax gains (losses) recorded in other comprehensive income (loss) related to cash flow hedges for the three and nine months ended June 30, 2019 and 2018 (in millions): Derivatives in ASC 815 Cash Flow Hedging Relationships Three Months Ended June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Foreign currency exchange derivatives $ (2 ) $ 6 $ 7 $ 7 Commodity derivatives (5 ) — (2 ) 2 Total $ (7 ) $ 6 $ 5 $ 9 The following table presents the location and amount of the pre-tax gains (losses) on cash flow hedges reclassified from AOCI into the Company’s consolidated statements of income for the three and nine months ended June 30, 2019 and 2018 (in millions): Derivatives in ASC 815 Cash Flow Hedging Relationships Location of Gain (Loss) Reclassified from AOCI into Income Three Months Ended Nine Months Ended 2019 2018 2019 2018 Foreign currency exchange derivatives Cost of sales $ 2 $ 1 $ 4 $ — Foreign currency exchange derivatives Income from discontinued operations — 1 — 2 Commodity derivatives Cost of sales — — (3 ) 3 Commodity derivatives Income from discontinued operations (1 ) 2 (10 ) 8 Total $ 1 $ 4 $ (9 ) $ 13 The following table presents the location and amount of pre-tax gains (losses) on derivatives not designated as hedging instruments recognized in the Company’s consolidated statements of income for the three and nine months ended June 30, 2019 and 2018 (in millions): 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 June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Foreign currency exchange derivatives Cost of sales $ (3 ) $ (4 ) $ (9 ) $ (5 ) Foreign currency exchange derivatives Net financing charges (18 ) (32 ) (42 ) (29 ) Foreign currency exchange derivatives Income from discontinued operations (2 ) 5 52 4 Equity swap Selling, general and administrative 7 (3 ) 10 (10 ) Total $ (16 ) $ (34 ) $ 11 $ (40 ) The pre-tax gains (losses) recorded in CTA within other comprehensive income (loss) related to net investment hedges were $(36) million and $165 million for the three months ended June 30, 2019 and 2018 , respectively. The pre-tax gains (losses) recorded in CTA within other comprehensive income (loss) related to net investment hedges were $48 million and $29 million for the nine months ended June 30, 2019 and 2018 , respectively. For the three and nine months ended June 30, 2019 and 2018 , no gains or losses were reclassified from CTA into income for the Company’s outstanding net investment hedges.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Jun. 30, 2019
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 for identical assets or liabilities; Level 2: Quoted prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or 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 June 30, 2019 and September 30, 2018 (in millions): Fair Value Measurements Using: Total as of June 30, 2019 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 $ 10 $ — $ 10 $ — Exchange traded funds (fixed income) 1 19 19 — — Other noncurrent assets Investments in marketable common stock 1 1 — — Deferred compensation plan assets 69 69 — — Exchange traded funds (fixed income) 1 138 138 — — Exchange traded funds (equity) 1 115 115 — — Equity swap 59 — 59 — Total assets $ 411 $ 342 $ 69 $ — Other current liabilities Foreign currency exchange derivatives $ 7 $ — $ 7 $ — Commodity derivatives 1 — 1 — Total liabilities $ 8 $ — $ 8 $ — Fair Value Measurements Using: Total as of September 30, 2018 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 $ 16 $ — $ 16 $ — Commodity derivatives 1 — 1 — Exchange traded funds (fixed income) 1 14 14 — — Other noncurrent assets Investments in marketable common stock 1 1 — — Deferred compensation plan assets 100 100 — — Exchange traded funds (fixed income) 1 148 148 — — Exchange traded funds (equity) 1 119 119 — — Equity swap 63 — 63 — Noncurrent assets held for sale Investments in marketable common stock 3 3 — — Total assets $ 465 $ 385 $ 80 $ — Other current liabilities Foreign currency exchange derivatives $ 12 $ — $ 12 $ — Commodity derivatives 2 — 2 — Liabilities held for sale Commodity derivatives 12 — 12 — Total liabilities $ 26 $ — $ 26 $ — 1 Classified as restricted investments for payment of asbestos liabilities. See Note 20, "Commitments and Contingencies," of the notes to consolidated financial statements for further details. Valuation Methods Foreign currency exchange derivatives : The foreign currency exchange derivatives are valued under a market approach using publicized spot and forward prices. Commodity derivatives : The commodity derivatives are valued under a market approach using publicized prices, where available, or dealer quotes. Equity swaps : 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. Deferred compensation plan assets : Assets held in the deferred compensation plans will be used to pay benefits under certain of the Company's non-qualified deferred compensation plans. The investments primarily consist of mutual funds which are publicly traded on stock exchanges and are valued using a market approach based on the quoted market prices. During the three and nine months ended June 30, 2019 , the Company recognized no unrealized gains/losses and unrealized losses of $2 million , respectively, in the consolidated statements of income on these investments that were still held as of June 30, 2019 , where they offset unrealized gains and losses on the related deferred compensation plan liability. Investments in marketable common stock and exchange traded funds : Investments in marketable common stock and exchange traded funds are valued using a market approach based on the quoted market prices, where available, or broker/dealer quotes of identical or comparable instruments. During the three and nine months ended June 30, 2019 , the Company recognized unrealized gains of $9 million and $8 million , respectively, in the consolidated statements of income on these investments that were still held as of June 30, 2019 , all of which related to restricted investments. Refer to Note 20, "Commitments and Contingencies," of the notes to consolidated financial statements for further information. 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 was $7.5 billion at June 30, 2019 and $9.6 billion at September 30, 2018 . The fair value of public debt was $7.3 billion at June 30, 2019 and $8.6 billion at September 30, 2018 , which was determined primarily using market quotes classified as Level 1 inputs within the ASC 820 fair value hierarchy. The fair value of other long-term debt was $0.2 billion at June 30, 2019 and $1.0 billion at September 30, 2018 , which was determined based on quoted market prices for similar instruments classified as Level 2 inputs within the ASC 820 fair value hierarchy.

Impairment of Long-Lived Assets

Impairment of Long-Lived Assets (Notes)	9 Months Ended
	Jun. 30, 2019
Disclosure of Impairment of Long-Lived Assets [Abstract]
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets The Company reviews long-lived assets, including tangible assets and other intangible assets with definitive lives, 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 350-30, "General Intangibles Other than Goodwill" and ASC 985-20, "Costs of software to be sold, leased, or marketed." 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. ASC 350-30 requires intangible assets acquired in a business combination that are used in research and development activities to be considered indefinite lived until the completion or abandonment of the associated research and development efforts. During the period that those assets are considered indefinite lived, they shall not be amortized but shall be tested for impairment annually and more frequently if events or changes in circumstances indicate that it is more likely than not that the asset is impaired. If the carrying amount of an intangible asset exceeds its fair value, an entity shall recognize an impairment loss in an amount equal to that excess. ASC 985-20 requires the unamortized capitalized costs of a computer software product be compared to the net realizable value of that product. The amount by which the unamortized capitalized costs of a computer software product exceed the net realizable value of that asset shall be written off. During the third quarter of fiscal 2019, the Company concluded it had a triggering event requiring assessment of impairment for certain of its long-lived assets in conjunction with the plans to dispose of a business within its Global Products segment that met the criteria to be classified as held for sale. Assets and liabilities held for sale are required to be recorded at the lower of carrying value or fair value less any costs to sell. Accordingly, the Company recorded an impairment charge of $235 million within restructuring and impairment costs in the consolidated statements of income in the third quarter of fiscal 2019 to write down the carrying value of the assets held for sale to fair value less any costs to sell. 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." In the first quarter of fiscal 2018, 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 in fiscal 2018. As a result, the Company reviewed the long-lived assets for impairment and recorded $28 million of asset impairment charges within restructuring and impairment costs in the consolidated statements of income. Of the total impairment charges, $23 million related to the Global Products segment and $5 million related to Corporate assets. In addition, the Company recorded $2 million of asset impairments within discontinued operations related to the Power Solutions segment in the first quarter of fiscal 2018. Refer to Note 8, "Significant Restructuring and Impairment Costs," of the notes to consolidated financial statements for additional information. The impairments were measured under a market approach utilizing an appraisal to determine fair values of the impaired assets. This method is 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." At June 30, 2019 and 2018 , the Company concluded it did not have any other triggering events requiring assessment of impairment of its long-lived assets.

Segment Information

Segment Information	9 Months Ended
	Jun. 30, 2019
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Segment Information	Segment Information four reportable segments for financial reporting purposes. • Building Solutions North America designs, sells, installs, and services HVAC and controls systems, integrated electronic security systems (including monitoring), and integrated fire detection and suppression systems for commercial, industrial, retail, small business, institutional and governmental customers in North America. Building Solutions North America also provides energy efficiency solutions and technical services, including inspection, scheduled maintenance, and repair and replacement of mechanical and control systems, to non-residential building and industrial applications in the North American marketplace. • Building Solutions EMEA/LA designs, sells, installs, and services HVAC, controls, refrigeration, integrated electronic security, integrated fire detection and suppression systems, and provides technical services to markets in Europe, the Middle East, Africa and Latin America. • Building Solutions Asia Pacific designs, sells, installs, and services HVAC, controls, refrigeration, integrated electronic security, integrated fire detection and suppression systems, and provides technical services to the Asia Pacific marketplace. • Global Products designs and produces heating and air conditioning for residential and commercial applications, and markets products and refrigeration systems to replacement and new construction market customers globally. The Global Products business also designs, manufactures and sells fire protection and security products, including intrusion security, anti-theft devices, and access control and video management systems, for commercial, industrial, retail, residential, small business, institutional and governmental customers worldwide. Global Products also includes the Johnson Controls-Hitachi joint venture. During the first quarter of fiscal 2019, the Company determined that the Power Solutions business met the criteria to be classified as a discontinued operation, which required retrospective application to financial information for all periods presented. Refer to Note 4, "Discontinued Operations," of the notes to consolidated financial statements for further information regarding the Company's discontinued operations. On October 1, 2018, the Company adopted ASU No. 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities." The new standard requires the mark-to-market of marketable securities investments previously recorded within accumulated other comprehensive income on the statement of financial position be recorded in the statement of income on a prospective basis beginning as of the adoption date. As these restricted investments do not relate to the underlying operating performance of its business, the Company’s definition of segment earnings excludes the mark-to-market adjustments beginning in the first quarter of fiscal 2019. Management evaluates the performance of its business segments primarily on segment earnings before interest, taxes and amortization ("EBITA"), which represents income from continuing operations before income taxes and noncontrolling interests, excluding general corporate expenses, intangible asset amortization, net financing charges, restructuring and impairment costs, and the net mark-to-market adjustments related to pension and postretirement plans and restricted asbestos investments. Financial information relating to the Company’s reportable segments is as follows (in millions): Net Sales Three Months Ended Nine Months Ended 2019 2018 2019 2018 Building Solutions North America $ 2,327 $ 2,246 $ 6,630 $ 6,355 Building Solutions EMEA/LA 922 926 2,707 2,748 Building Solutions Asia Pacific 691 681 1,932 1,864 Global Products 2,511 2,429 6,425 6,250 Total net sales $ 6,451 $ 6,282 $ 17,694 $ 17,217 Segment EBITA Three Months Ended Nine Months Ended 2019 2018 2019 2018 Building Solutions North America $ 300 $ 314 $ 807 $ 780 Building Solutions EMEA/LA 101 96 258 242 Building Solutions Asia Pacific 98 97 240 242 Global Products 333 435 774 949 Total segment EBITA $ 832 $ 942 $ 2,079 $ 2,213 Corporate expenses $ 70 $ (142 ) $ (233 ) $ (442 ) Amortization of intangible assets (93 ) (98 ) (288 ) (282 ) Restructuring and impairment costs (235 ) — (235 ) (154 ) Net mark-to-market adjustments 9 — 8 — Net financing charges (119 ) (95 ) (302 ) (304 ) Income from continuing operations before income taxes $ 464 $ 607 $ 1,029 $ 1,031

Guarantees

Guarantees	9 Months Ended
	Jun. 30, 2019
Guarantees [Abstract]
Guarantees	Guarantees Certain of the Company's subsidiaries at the business segment level have guaranteed the performance of third-parties and provided financial guarantees for uncompleted work and financial commitments. The terms of these guarantees vary with end dates ranging from the current fiscal year through the completion of such transactions and would typically be triggered in the event of nonperformance. Performance under the guarantees, if required, would not have a material effect on the Company's financial position, results of operations or cash flows. 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 for continuing operations is recorded in the consolidated statements of financial position in deferred revenue or 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 for continuing operations, including extended warranties for which deferred revenue is recorded, for the nine months ended June 30, 2019 and 2018 were as follows (in millions): Nine Months Ended 2019 2018 Balance at beginning of period $ 315 $ 323 Accruals for warranties issued during the period 85 73 Accruals from acquisition and divestitures 2 1 Accruals related to pre-existing warranties (20 ) (21 ) Settlements made (in cash or in kind) during the period (79 ) (67 ) Currency translation 1 — Balance at end of period $ 304 $ 309 As a result of the Tyco merger in the fourth quarter of fiscal 2016, the Company recorded, as part of the acquired liabilities of Tyco, $290 million of post sale contingent tax indemnification liabilities. The liabilities are recorded at fair value and relate to certain tax related matters borne by the buyer of previously divested subsidiaries of Tyco which Tyco has indemnified certain parties and the amounts are probable of being paid. At September 30, 2018, the Company recorded liabilities of $255 million , of which $235 million was related to prior divested businesses and the remainder relates to Tyco’s tax sharing agreements from its 2007 and 2012 spin-off transactions. These are certain guarantees or indemnifications extended among Tyco, Medtronic, TE Connectivity, ADT and Pentair in accordance with the terms of the 2007 and 2012 separation and tax sharing agreements. In the third quarter of fiscal 2019, the majority of tax indemnification liabilities were resolved including a $226 million release as a result of changes to the likelihood of payments due to the expiration of certain statute of limitations.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Environmental Matters 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. As of June 30, 2019 , reserves for environmental liabilities for continuing operations totaled $163 million , of which $52 million was recorded within other current liabilities and $111 million was recorded within other noncurrent liabilities in the consolidated statements of financial position. Reserves for environmental liabilities for continuing operations totaled $37 million at September 30, 2018 , of which $10 million was recorded within other current liabilities and $27 million was recorded within other noncurrent liabilities in the consolidated statements of financial position. Tyco Fire Products L.P. (“Tyco Fire Products”), in coordination with the Wisconsin Department of Natural Resources ("WDNR"), has been conducting an environmental assessment of its Fire Technology Center ("FTC") located in Marinette, Wisconsin and surrounding areas in the City of Marinette and Town of Peshtigo, Wisconsin. In connection with the assessment, perfluorooctane sulfonate ("PFOS") and perfluorooctanoic acid ("PFOA") and/or other per- and poly fluorinated substances ("PFAS") have been detected at the FTC and in groundwater and surface water outside of the boundaries of the FTC. Tyco Fire Products continues to investigate the extent of potential migration of these compounds and is working closely with WDNR to address these issues insofar as they related to this migration. The increase in reserves as of June 30, 2019 includes $140 million related to remediation efforts to be undertaken to address contamination relating to fire-fighting foams containing PFAS compounds at or near the FTC, as well as the continued remediation of arsenic and other contaminants at the Tyco Fire Products Stanton Street manufacturing facility also located in Marinette, Wisconsin (the “Stanton Street Facility”). The Company is not able to estimate a possible loss or range of loss in excess of the established accruals at this time. A substantial portion of the increased reserves relates to remediation resulting from the use of fire-fighting foams containing PFAS at the FTC. The use of fire-fighting foams at the FTC was primarily for training and testing purposes in order to ensure that such products sold by the Company’s affiliates, Chemguard, Inc. ("Chemguard") and Tyco Fire Products, were effective at suppressing high intensity fires that may occur at military installations, airports or elsewhere. The reserve was recorded in the quarter ended June 30, 2019 following a comprehensive review by independent environmental consultants related to the presence of PFAS at or near the FTC, as well as remediation discussions with the WDNR. Tyco Fire Products has been engaged in remediation activities at the Stanton Street Facility since 1990. Its corporate predecessor, Ansul Incorporated (“Ansul”) manufactured arsenic-based agricultural herbicides at the Stanton Street Facility, which resulted in significant arsenic contamination of soil and groundwater on the site and in parts of the adjoining Menominee River. In 2009, Ansul entered into an Administrative Consent Order (the "Consent Order") with the U.S. Environmental Protection Agency to address the presence of arsenic at the site. Under this agreement, Tyco Fire Products’ principal obligations are to contain the arsenic contamination on the site, pump and treat on-site groundwater, dredge, treat and properly dispose of contaminated sediments in the adjoining river areas, and monitor contamination levels on an ongoing basis. Activities completed under the Consent Order since 2009 include the installation of a subsurface barrier wall around the facility to contain contaminated groundwater, the installation of a groundwater extraction and treatment system and the dredging and offsite disposal of treated river sediment. The increase in the reserve related to the Stanton Street Facility was recorded following a further review of the Consent Order, which resulted in the identification of several structural upgrades needed to preserve the effectiveness of prior remediation efforts. Potential environmental 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. It is possible that technological, regulatory or enforcement developments, the results of additional environmental studies or other factors could change the Company's expectations with respect to future charges and cash outlays, and such changes could be material to the Company's future results of operations, financial condition or cash flows. Nevertheless, the Company does not currently believe that any claims, penalties or costs in addition to the amounts accrued 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. At June 30, 2019 and September 30, 2018 , the Company recorded conditional asset retirement obligations for continuing operations of $30 million and $29 million , respectively. Asbestos Matters The Company and certain of its subsidiaries, along with numerous other third parties, are named as defendants in personal injury lawsuits based on alleged exposure to asbestos containing materials. These cases have typically involved product liability claims based primarily on allegations of manufacture, sale or distribution of industrial products that either contained asbestos or were used with asbestos containing components. As of June 30, 2019 , the Company's estimated asbestos related net liability recorded on a discounted basis within the Company's consolidated statements of financial position was $167 million . The net liability within the consolidated statements of financial position was comprised of a liability for pending and future claims and related defense costs of $538 million , of which $55 million was recorded in other current liabilities and $483 million was recorded in other noncurrent liabilities. The Company also maintained separate cash, investments and receivables related to insurance recoveries within the consolidated statements of financial position of $371 million , of which $49 million was recorded in other current assets, and $322 million was recorded in other noncurrent assets. Assets included $16 million of cash and $272 million of investments, which have all been designated as restricted. In connection with the recognition of liabilities for asbestos-related matters, the Company records asbestos-related insurance recoveries that are probable; the amount of such recoveries recorded at June 30, 2019 was $83 million . As of September 30, 2018 , the Company's estimated asbestos related net liability recorded on a discounted basis within the Company's consolidated statements of financial position was $173 million . The net liability within the consolidated statements of financial position was comprised of a liability for pending and future claims and related defense costs of $550 million , of which $55 million was recorded in other current liabilities and $495 million was recorded in other noncurrent liabilities. The Company also maintained separate cash, investments and receivables related to insurance recoveries within the consolidated statements of financial position of $377 million , of which $33 million was recorded in other current assets, and $344 million was recorded in other noncurrent assets. Assets included $6 million of cash and $281 million of investments, which have all been designated as restricted. In connection with the recognition of liabilities for asbestos-related matters, the Company records asbestos-related insurance recoveries that are probable; the amount of such recoveries recorded at September 30, 2018 was $90 million . The Company's estimate of the liability and corresponding insurance recovery for pending and future claims and defense costs is based on the Company's historical claim experience, and estimates of the number and resolution cost of potential future claims that may be filed and is discounted to present value from 2068 (which is the Company's reasonable best estimate of the actuarially determined time period through which asbestos-related claims will be filed against Company affiliates). Asbestos related defense costs are included in the asbestos liability. The Company's legal strategy for resolving claims also impacts these estimates. The Company considers various trends and developments in evaluating the period of time (the look-back period) over which historical claim and settlement experience is used to estimate and value claims reasonably projected to be made through 2068. At least annually, the Company assesses the sufficiency of its estimated liability for pending and future claims and defense costs by evaluating actual experience regarding claims filed, settled and dismissed, and amounts paid in settlements. In addition to claims and settlement experience, the Company considers additional quantitative and qualitative factors such as changes in legislation, the legal environment, and the Company's defense strategy. The Company also evaluates the recoverability of its insurance receivable on an annual basis. The Company evaluates all of these factors and determines whether a change in the estimate of its liability for pending and future claims and defense costs or insurance receivable is warranted. The amounts recorded by the Company for asbestos-related liabilities and insurance-related assets are based on the Company's strategies for resolving its asbestos claims, currently available information, and a number of estimates and assumptions. Key variables and assumptions include the number and type of new claims that are filed each year, the average cost of resolution of claims, the identity of defendants, the resolution of coverage issues with insurance carriers, amount of insurance, and the solvency risk with respect to the Company's insurance carriers. Many of these factors are closely linked, such that a change in one variable or assumption will impact one or more of the others, and no single variable or assumption predominately influences the determination of the Company's asbestos-related liabilities and insurance-related assets. Furthermore, predictions with respect to these variables are subject to greater uncertainty in the later portion of the projection period. Other factors that may affect the Company's liability and cash payments for asbestos-related matters include uncertainties surrounding the litigation process from jurisdiction to jurisdiction and from case to case, reforms of state or federal tort legislation and the applicability of insurance policies among subsidiaries. As a result, actual liabilities or insurance recoveries could be significantly higher or lower than those recorded if assumptions used in the Company's calculations vary significantly from actual results. Insurable Liabilities The Company records liabilities for its workers' compensation, product, general, property and auto liabilities. The determination of these liabilities and related expenses is dependent on claims experience. For most of these liabilities, claims incurred but not yet reported are estimated by utilizing actuarial valuations based upon historical claims experience. At June 30, 2019 and September 30, 2018 , the insurable liabilities totaled $451 million and $417 million , respectively, of which $118 million and $95 million was recorded within other current liabilities, $22 million and $22 million was recorded within accrued compensation and benefits, and $311 million and $300 million was recorded within other noncurrent liabilities in the consolidated statements of financial position, respectively. The Company records receivables from third party insurers when recovery has been determined to be probable. The amount of such receivables recorded at June 30, 2019 and September 30, 2018 were $26 million , of which $6 million was recorded within other current assets and $20 million was recorded within other noncurrent assets, respectively. The Company maintains captive insurance companies to manage its insurable liabilities. Aqueous Film-Forming Foam ("AFFF") Litigation Two of our subsidiaries, Chemguard and Tyco Fire Products, have been named, along with other defendant manufacturers, in a number of class action and other lawsuits relating to the use of fire-fighting foam products by the U.S. Department of Defense (the "DOD") and others for fire suppression purposes and related training exercises. Plaintiffs generally allege that the firefighting foam products manufactured by defendants contain or break down into the chemicals PFOS and PFOA and/or other PFAS compounds and that the use of these products by others at various airbases, airports and other sites resulted in the release of these chemicals into the environment and ultimately into communities’ drinking water supplies neighboring those airports, airbases and other sites. PFOA, PFOS, and other PFAS compounds are being studied by the United States Environmental Protection Agency ("EPA") and other environmental and health agencies and researchers. The EPA has not issued regulatory limits, however; while those studies continue, the EPA has issued a health advisory level for PFOA and PFOS in drinking water. Both PFOA and PFOS are types of synthetic chemical compounds that have been present in firefighting foam. However, both are also present in many existing consumer products. According to EPA, PFOA and PFOS have been used to make carpets, clothing, fabrics for furniture, paper packaging for food and other materials (e.g., cookware) that are resistant to water, grease or stains. Plaintiffs generally seek compensatory damages, including damages for alleged personal injuries, medical monitoring, and alleged diminution in property values, and also seek punitive damages and injunctive relief to address remediation of the alleged contamination. In September of 2018, the Company filed a Petition for Multidistrict Litigation with the United States Judicial Panel on Multidistrict Litigation (“JPML”) seeking to consolidate all existing and future federal cases into one jurisdiction. On December 7, 2018, the JPML issued an order transferring various AFFF cases to a multi-district litigation (“MDL”) before the United States District Court for the District of South Carolina. Additional cases have been identified for transfer to the MDL. AFFF Putative Class Actions Chemguard and Tyco Fire Products are named in 23 putative class actions in federal and state courts in Colorado, Delaware, Florida, Massachusetts, New York, Pennsylvania, Washington New Hampshire, and Michigan. Each of these cases has been transferred to the MDL. The following putative class actions were filed in fiscal year 2019: • Grubb v. The 3M Company et al. , filed October 30, 2018 in the United States District Court, District of Delaware. • County of Dutchess v. The 3M Company et al., filed October 12, 2018 in the United States District Court, Southern District of New York. • Battisti et al. v. The 3M Company et al. , filed December 20, 2018 in the United States District Court, Middle District of Florida. • Jackson et al. v. The 3M Company et al. , filed February 5, 2019 in the United States District Court, Western District of Washington. • Smith et al. v. The 3M Company et al. , filed May 24, 2019 in the United States District Court, District of New Hampshire. • Cadrette et al. v. The 3M Company et al. , filed May 24, 2019 in the United States District Court, Eastern District of Michigan. AFFF Individual or Mass Actions There are approximately 60 individual or “mass” actions pending in federal court in Colorado (41 cases), New York (4 cases), Pennsylvania (11 cases), New Mexico (2 cases) and South Carolina (2 cases) against Chemguard and Tyco Fire Products and other defendants in which the plaintiffs generally seek compensatory damages, including damages for alleged personal injuries, medical monitoring, and alleged diminution in property values. The cases involve approximately 7,000 plaintiffs in Colorado, approximately 126 plaintiffs in New York, 15 plaintiffs in Pennsylvania and two plaintiffs in New Mexico. These matters have been transferred to or directly-filed in the MDL. The Company is also on notice of approximately 660 other possible individual product liability claims and three possible municipal claims by filings made in Pennsylvania state court, but complaints have not been filed in those matters, but the Company anticipates that they soon will be. AFFF Municipal Cases Chemguard and Tyco Fire Products are also defendants in 23 cases in federal and state courts involving municipal or water provider plaintiffs in Alaska, Arizona, Florida, Massachusetts, New Jersey, New York, Maryland, Ohio and South Carolina. These municipal plaintiffs generally allege that the use of the defendants’ fire-fighting foam products at fire training academies, municipal airports, Air National Guard bases, or Navy bases released PFOS and PFOA into public water supply wells, allegedly requiring remediation of public property. All of these cases have been transferred to the MDL. The following municipal actions were filed in fiscal year 2019: • Dutchess County v. The 3M Company et al. filed October 12, 2018 (removed to the United States District Court, Southern District of New York) and styled as a class action. • City of Dayton v. The 3M Company et al., filed October 3, 2018 in the United States District Court, Southern District of Ohio. • City of Stuart v. The 3M Company et al., filed October 18, 2018 in the United States District Court, Southern District of Florida. • City of Tucson and Town of Marana v. The 3M Company et al., filed November 8, 2018 in the Superior Court of the State of Arizona, County of Pima (removed to the United States District Court for the District of Arizona). • New Jersey-American Water Company, Inc. v. The 3M Company et al., filed November 8, 2018 in the United States District Court for the District of New Jersey. • Village of Farmingdale v. The 3M Company et al., filed December 19, 2018 in the Supreme Court of the State of New York, County of Nassau (removed to the United States District Court for the Eastern District of New York). • Town of East Hampton v. The 3M Company et al. , filed December 28, 2018 in the Supreme Court of the State of New York, County of Suffolk. • Ridgewood Water v. The 3M Company et al. , filed February 25, 2019, in the Superior Court of the State of New Jersey, Bergen County (removed to the United States District Court for the District of New Jersey). • Atlantic City Municipal Utilities Authority v. The 3M Company et al. , filed April 10, 2019 in the United States District Court, District of New Jersey. • Town of Vienna v. The 3M Company et al. , filed March 30, 2019 in the United States District Court, District of Maryland. • New York American Water Company, Inc. v. The 3M Company et al. , filed April 11, 2019 in the United States District Court, Eastern District of New York. • City of Fairbanks v. The 3M Company et al. , filed April 26, 2019 in the United States District Court, District of Alaska. • County of Westchester v. The 3M Company et al. , filed May 24, 2019 in the United States District Court, Southern District of New York. • Diane Hebrank et al. v. City of Newburgh v. The 3M Company et al. , third-party complaint filed June 10, 2019, in the Supreme Court of New York, Orange County. • California-American Water v. The 3M Company et al. , direct-filed on June 21, 2019 in the MDL pending in the United States District Court, District of South Carolina. • City of Sioux Falls v. The 3M Company et al. , direct-filed on June 26, 2019 in the MDL pending in the United States District Court, District of South Carolina. • Sioux Falls Regional Airport Authority v. The 3M Company et al. , direct-filed on June 28, 2019 in the MDL pending in the United States District Court, District of South Carolina. In May 2018, the Company was also notified by the Widefield Water and Sanitation District in Colorado Springs, Colorado that it may assert claims regarding its remediation costs in connection with PFOS and PFOA contamination allegedly resulting from the use of those products at the Peterson Air Force Base. In addition, three water districts in Pennsylvania, Horsham Water and Sewer Authority, Warminster Municipal Authority, and Warrington Township have filed praecipes for summons against Chemguard and Tyco Fire Products and other AFFF manufacturers relating to alleged PFOS and PFOA contamination. These praecipes are not active suits, but have the effect of tolling the statute of limitations. State Attorneys General Litigation related to AFFF In June 2018, the State of New York filed a lawsuit in New York state court (State of New York v. The 3M Company et al., No. 904029-18 (N.Y. Sup. Ct., Albany County)) against a number of manufacturers, including affiliates of the Company, with respect to alleged PFOS and PFOA contamination purportedly resulting from firefighting foams used at locations across New York, including Stewart Air National Guard Base in Newburgh and Gabreski Air National Guard Base in Southampton, Plattsburgh Air Force Base in Plattsburgh, Griffiss Air Force Base in Rome, and unspecified “other” sites throughout the State. The lawsuit seeks to recover costs and natural resource damages associated with contamination at these sites. This suit has been removed to the United States District Court for the Northern District of New York and transferred to the MDL. In February 2019, the State of New York filed a second lawsuit in New York state court (State of New York v. The 3M Company et al., (N.Y. Sup. Ct., Albany County)), against a number of manufacturers, including affiliates of the Company, with respect to alleged PFOS and PFOA contamination purportedly resulting from firefighting foams used at additional locations across New York. This suit has been removed to the United States District Court for the Northern District of New York and tagged for transfer to the MDL. In July 2019, the State of New York filed a third lawsuit in New York state court ( State of New York v. The 3M Company et al. , (N.Y. Sup. Ct., Albany County)), against a number of manufacturers, including affiliates of the Company, with respect to alleged PFOS and PFOA contamination purportedly resulting from firefighting foams used at further additional locations across New York. This third complaint has not been served. In January 2019, the State of Ohio filed a lawsuit in Ohio state court (State of Ohio v. The 3M Company et al., No. G-4801-CI-021804752 -000 (Court of Common Pleas of Lucas County, Ohio)) against a number of manufacturers, including affiliates of the Company, with respect to PFOS and PFOA contamination allegedly resulting from the use of firefighting foams at various specified and unspecified locations across Ohio. The lawsuit seeks to recover costs and natural resource damages associated with the contamination. This lawsuit has been removed to the United States District Court for the Northern District of Ohio and transferred to the MDL. In addition, in May and June 2019, three other states filed lawsuits in their respective state courts against a number of manufacturers, including affiliates of the Company, with respect to PFOS and PFOA contamination allegedly resulting from the use of firefighting foams at various specified and unspecified locations across their jurisdictions ( State of New Hampshire v. The 3M Company et al. ; State of Vermont v. The 3M Company et al .; State of New Jersey v. The 3M Company et al .). The State of New Jersey action has been removed to the United State District Court for the District of New Jersey and tagged for transfer to the MDL. The State of Vermont and State of New Hampshire actions were recently served. AFFF Matters Related to the Tyco Fire Products Fire Technology Center in Marinette, Wisconsin Tyco Fire Products and Chemguard are defendants in one lawsuit in Marinette County, Wisconsin alleging damages due to the historical use of AFFF products at Tyco’s Fire Technology Center in Marinette, Wisconsin. The putative class action, Joan & Richard Campbell for themselves and on behalf of other similarly situated v. Tyco Fire Products LP and Chemguard Inc., et al. (Marinette County Circuit Court, filed Dec. 17, 2018) alleges PFOA/PFOS contaminated groundwater migrated off Tyco’s property and into residential drinking water wells causing both personal injuries and property damage to the plaintiffs; Tyco and Chemguard removed this case to the United States District Court for the Eastern District of Wisconsin and it has been transferred to the MDL. A second lawsuit, Duane and Janell Goldsmith individually and on behalf of H.G. and K.G v. Tyco Fire Products LP and Chemguard Inc., et al. (Marinette County Circuit Court, filed Dec. 17, 2018) was also filed by a family alleging personal injuries due to contaminated groundwater; this case has been dismissed without prejudice. The Company is vigorously defending the above AFFF matters and believes that it has meritorious defenses to class certification and the claims asserted. However, there are numerous factual and legal issues to be resolved in connection with these claims, and it is extremely difficult to predict the outcome or ultimate financial exposure, if any, represented by these matters, but there can be no assurance that any such exposure will not be material. The Company is also pursuing insurance coverage for these matters. Bosch Litigation On March 15, 2019, a German subsidiary of the Company received a complaint from Robert Bosch GmbH (“Bosch”), filed in a German court. The complaint relates to an automotive starter batteries joint venture in which the Company and Bosch were 80/20 parties to this joint venture. At the time the complaint was filed, JCI’s ownership interest in the joint venture was to be transferred to entities controlled by the Purchaser upon consummation of the previously announced sale of the Company’s Power Solutions business. The complaint alleges that certain internal Company reorganization transactions were not in compliance with the arrangements relating to such joint venture. The complaint seeks a declaration that such internal reorganization transactions are void. In the alternative, the complaint seeks a declaration of damages that represent an alleged difference between (i) the value ascribed to the joint venture interests in connection with the Power Solutions sale and (ii) the value that was assigned to those interests in connection with such internal reorganization transactions. The Company believes that it has several strong defenses to the substance of the complaint and that the complaint substantially overstates any reasonable valuation of the joint venture interests. The Company does not believe the complaint has merit, and intends to defend it vigorously. While litigation is inherently uncertain, the Company believes that any ultimate liability that may arise from this proceeding would be immaterial to its business, financial condition and results of operations. Under the previously announced Stock and Asset Purchase Agreement dated November 13, 2018 between the Company and the Purchaser, the Company has agreed to indemnify the Purchaser for any damages that could arise from this litigation. Other Matters 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.

Related Party Transactions (Not

Related Party Transactions (Notes)	9 Months Ended
	Jun. 30, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions In the ordinary course of business, the Company enters into transactions with related parties, such as equity affiliates. Such transactions consist of facility management services, the sale or purchase of goods and other arrangements. The net sales to and purchases from related parties included in the consolidated statements of income for continuing operations were $65 million and $27 million , respectively, for the three months ended June 30, 2019 ; and $65 million and $19 million , respectively, for the three months ended June 30, 2018 . The net sales to and purchases from related parties included in the consolidated statements of income for continuing operations were $162 million and $57 million , respectively, for the nine months ended June 30, 2019 ; and $169 million and $43 million , respectively, for the nine months ended June 30, 2018 . The following table sets forth the amount of accounts receivable due from and payable to related parties in the consolidated statements of financial position for continuing operations (in millions): June 30, 2019 September 30, 2018 Receivable from related parties $ 55 $ 36 Payable to related parties 8 18

Revenue Recognition (Policies)

Revenue Recognition (Policies)	9 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue Recognition, Policy [Policy Text Block]	The Company designs, manufactures and installs building products and systems around the world, including HVAC equipment, HVAC controls, energy-management systems, security systems, fire detection systems and fire suppression solutions. The Company also provides energy efficiency solutions and technical services, including inspection, scheduled maintenance, and repair and replacement of mechanical and control systems. The Company recognizes revenue from certain long-term contracts to design, manufacture and install building products and systems as well as unscheduled repair or replacement services on an over time basis, with progress towards completion measured using a cost-to-cost input method based on the relationship between actual costs incurred and total estimated costs at completion. The cost-to-cost input method is used as it best depicts the transfer of control to the customer that occurs as the Company incurs costs. Changes to the original estimates may be required during the life of the contract and such estimates are reviewed monthly. If contract modifications result in additional goods or services that are distinct from those transferred before the modification, they are accounted for prospectively as if the Company entered into a new contract. If the goods or services in the modification are not distinct from those in the original contract, sales and gross profit are adjusted using the cumulative catch-up method for revisions in estimated total contract costs and contract values. Estimated losses are recorded when identified. The Company elected the practical expedient which permits the promised amount of consideration to not be adjusted for the effects of a significant financing component as at contract inception the Company expects to receive the payment within the twelve months of transfer of goods or services. The Company enters into extended warranties and long-term service and maintenance agreements with certain customers. For these arrangements, revenue is recognized over time on a straight-line basis over the respective contract term. The Company also sells certain HVAC and refrigeration products and services in bundled arrangements with multiple performance obligations, such as equipment, commissioning, service labor and extended warranties. Approximately four to twelve months separate the timing of the first deliverable until the last piece of equipment is delivered, and there may be extended warranty arrangements with duration of one to five years commencing upon the end of the standard warranty period. In addition, the Company sells security monitoring systems that may have multiple performance obligations, including equipment, installation, monitoring services and maintenance agreements. Revenues associated with sale of equipment and related installations are recognized over time on a cost-to-cost input method, while the revenue for monitoring and maintenance services are recognized over time as services are rendered. The transaction price is allocated to each performance obligation based on the relative selling price method. In order to estimate relative selling price, market data and transfer price studies are utilized. If the standalone selling price is not directly observable, the Company estimates the standalone selling price using an adjusted market assessment approach or expected cost plus margin approach. Revenue recognized for security monitoring equipment and installation is limited to the lesser of their allocated amounts under the estimated selling price hierarchy or the non-contingent up-front consideration received at the time of installation, since collection of future amounts under the arrangement with the customer is contingent upon the delivery of monitoring and maintenance services. For transactions in which the Company retains ownership of the subscriber system asset, fees for monitoring and maintenance services are recognized over time on a straight-line basis over the contract term. Non-refundable fees received in connection with the initiation of a monitoring contract, along with associated direct and incremental selling costs, are deferred and amortized over the estimated life of the contract. In all other cases, the Company recognizes revenue at the point in time when control over the goods or services transfers to the customer. The Company considers the contractual consideration payable by the customer and assess variable consideration that may affect the total transaction price, including discounts, rebates, refunds, credits or other similar sources of variable consideration, when determining the transaction price of each contract. The Company includes variable consideration in the estimated transaction price when it is probable that significant reversal of revenue recognized would not occur when the uncertainty associated with variable consideration is subsequently resolved. These estimates are based on the amount of consideration that the Company expects to be entitled to. Shipping and handling costs billed to customers are included in sales and the related costs are included in cost of sales when control transfers to the customer. The Company has elected to present amounts collected from customers for sales and other taxes net of the related amounts remitted.

New Accounting Standards New Ac

New Accounting Standards New Accounting Pronouncements (Tables)	9 Months Ended
	Jun. 30, 2019
Accounting Changes and Error Corrections [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	The impact of adoption of the New Revenue Standard to the Company's consolidated statement of financial position as of June 30, 2019 is as follows (in millions): June 30, 2019 As reported Under previous accounting guidance Impact from adopting the New Revenue Standard Consolidated Statement of Financial Position Assets Accounts receivable - net $ 6,033 $ 6,065 $ (32 ) Inventories 2,050 2,064 (14 ) Other current assets 1,179 1,204 (25 ) Property, plant and equipment - net 3,282 3,242 40 Other noncurrent assets 1,787 1,758 29 Liabilities and Equity Deferred revenue 1,389 1,380 9 Retained earnings 6,366 6,377 (11 )

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Jun. 30, 2019
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Groups, Including Discontinued Operations [Table Text Block]	The following table summarizes the carrying value of the Power Solutions assets and liabilities held for sale at September 30, 2018 (in millions): September 30, 2018 Cash $ 15 Accounts receivable - net 1,443 Inventories 1,405 Other current assets 152 Assets held for sale $ 3,015 Property, plant and equipment - net $ 2,871 Goodwill 1,092 Other intangible assets - net 161 Investments in partially-owned affiliates 453 Other noncurrent assets 611 Noncurrent assets held for sale $ 5,188 Short-term debt $ 9 Current portion of long-term debt 25 Accounts payable 1,237 Accrued compensation and benefits 125 Other current liabilities 395 Liabilities held for sale $ 1,791 Long-term debt $ 31 Pension and postretirement benefits 101 Other noncurrent liabilities 75 Noncurrent liabilities held for sale $ 207
Power Solutions | Discontinued Operations, Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operations, Income Statement Disclosures [Table Text Block]	The following table summarizes the results of Power Solutions reclassified as discontinued operations for the three and nine month periods ended June 30, 2019 and 2018 (in millions). As the Power Solutions sale occurred on April 30, 2019, there is only one month of Power Solutions results included in the three month period ended June 30, 2019, and only seven months included in the nine month period ended June 30, 2019. Three Months Ended Nine Months Ended 2019 2018 2019 2018 Net sales $ 562 $ 1,838 $ 5,001 $ 5,813 Income from discontinued operations before income taxes 5,315 303 6,039 978 Provision for income taxes on discontinued operations (1,264 ) (45 ) (1,441 ) (137 ) Income from discontinued operations attributable to noncontrolling interests, net of tax — (9 ) (24 ) (33 ) Income from discontinued operations $ 4,051 $ 249 $ 4,574 $ 808

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	The following table presents the Company's revenues disaggregated by segment and by product versus services revenue for the three and nine months ended June 30, 2019 (in millions): Three Months Ended Nine Months Ended Products & Systems Services Total Products & Systems Services Total Building Solutions North America $ 1,494 $ 833 $ 2,327 $ 4,202 $ 2,428 $ 6,630 Building Solutions EMEA/LA 464 458 922 1,297 1,410 2,707 Building Solutions Asia Pacific 427 264 691 1,134 798 1,932 Global Products 2,511 — 2,511 6,425 — 6,425 Total $ 4,896 $ 1,555 $ 6,451 $ 13,058 $ 4,636 $ 17,694 The following table presents further disaggregation of Global Products segment revenues by product type for the three and nine months ended June 30, 2019 (in millions): Three Months Ended June 30, Nine Months Ended 2019 2019 Building Management $ 342 $ 943 HVAC & Refrigeration Equipment 1,869 4,628 Specialty 300 854 Total Global Products $ 2,511 $ 6,425
Contract with Customer, Asset and Liability [Table Text Block]	The following table presents the location and amount of contract balances in the Company's consolidated statements of financial position (in millions): Location of contract balances June 30, 2019 October 1, 2018 Contract assets - current Accounts receivable - net $ 1,428 $ 1,261 Contract assets - noncurrent Other noncurrent assets 85 85 Contract liabilities - current Deferred revenue (1,389 ) (1,335 ) Contract liabilities - noncurrent Other noncurrent liabilities (125 ) (113 ) Total $ (1 ) $ (102 )

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Inventories	Inventories consisted of the following (in millions): June 30, 2019 September 30, 2018 Raw materials and supplies $ 685 $ 606 Work-in-process 215 155 Finished goods 1,150 1,058 Inventories $ 2,050 $ 1,819

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Jun. 30, 2019
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 nine month period ended June 30, 2019 were as follows (in millions): Business Acquisitions Business Divestitures Currency Translation and Other September 30, June 30, 2018 2019 Building Solutions North America $ 9,603 $ — $ — $ (5 ) $ 9,598 Building Solutions EMEA/LA 1,950 1 (1 ) (40 ) 1,910 Building Solutions Asia Pacific 1,235 — — (9 ) 1,226 Global Products 5,593 9 (22 ) (2 ) 5,578 Total $ 18,381 $ 10 $ (23 ) $ (56 ) $ 18,312
Other Intangible Assets	The Company’s other intangible assets, primarily from business acquisitions valued based on independent appraisals, consisted of (in millions): June 30, 2019 September 30, 2018 Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Amortized intangible assets Technology $ 1,316 $ (342 ) $ 974 $ 1,317 $ (251 ) $ 1,066 Customer relationships 2,745 (714 ) 2,031 2,941 (599 ) 2,342 Miscellaneous 566 (228 ) 338 458 (185 ) 273 Total amortized intangible assets 4,627 (1,284 ) 3,343 4,716 (1,035 ) 3,681 Unamortized intangible assets Trademarks/trade names 2,306 — 2,306 2,386 — 2,386 Miscellaneous 90 — 90 120 — 120 2,396 — 2,396 2,506 — 2,506 Total intangible assets $ 7,023 $ (1,284 ) $ 5,739 $ 7,222 $ (1,035 ) $ 6,187

Significant Restructuring Cos_2

Significant Restructuring Costs Change in Restructuring Reserve - 2018 Restructuring Plan (Tables)	9 Months Ended
	Jun. 30, 2019
2018 Restructuring Plan
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 2018 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 Total Original reserve $ 209 $ 42 $ 12 $ 263 Utilized—cash (45 ) — (2 ) (47 ) Utilized—noncash — (42 ) — (42 ) Balance at September 30, 2018 $ 164 $ — $ 10 $ 174 Utilized—cash (59 ) — (5 ) (64 ) Transfer to liabilities held for sale (4 ) — — (4 ) Balance at June 30, 2019 $ 101 $ — $ 5 $ 106

Significant Restructuring Cos_3

Significant Restructuring Costs Changes in Restructuring Reserve - 2017 Restructuring Plan (Tables)	9 Months Ended
	Jun. 30, 2019
2017 Restructuring Plan
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 2017 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 $ 276 $ 77 $ 14 $ — $ 367 Utilized—cash (75 ) — — — (75 ) Utilized—noncash — (77 ) (1 ) — (78 ) Adjustment to restructuring reserves 25 — — — 25 Balance at September 30, 2017 $ 226 $ — $ 13 $ — $ 239 Utilized—cash (152 ) — (6 ) — (158 ) Utilized—noncash — — — (1 ) (1 ) Balance at September 30, 2018 $ 74 $ — $ 7 $ (1 ) $ 80 Utilized—cash (5 ) — (1 ) — (6 ) Utilized—noncash — — — (2 ) (2 ) Transfer to liabilities held for sale (3 ) — — — (3 ) Balance at June 30, 2019 $ 66 $ — $ 6 $ (3 ) $ 69

Significant Restructuring Cos_4

Significant Restructuring Costs Changes in Restructuring Reserve - 2016 Restructuring Plan (Tables)	9 Months Ended
	Jun. 30, 2019
2016 Restructuring Plan [Member]
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 $ 368 $ 190 $ 62 $ — $ 620 Acquired Tyco restructuring reserves 78 — — — 78 Utilized—cash (32 ) — — — (32 ) Utilized—noncash — (190 ) (32 ) 1 (221 ) Balance at September 30, 2016 $ 414 $ — $ 30 $ 1 $ 445 Adient spin-off impact (194 ) — (22 ) — (216 ) Utilized—cash (86 ) — (2 ) — (88 ) Utilized—noncash — — — 1 1 Adjustment to restructuring reserves (25 ) — — — (25 ) Transfer to liabilities held for sale (3 ) — — — (3 ) Adjustment to acquired Tyco restructuring reserves (22 ) — — — (22 ) Balance at September 30, 2017 $ 84 $ — $ 6 $ 2 $ 92 Utilized—cash (17 ) — (2 ) — (19 ) Balance at September 30, 2018 $ 67 $ — $ 4 $ 2 $ 73 Utilized—cash (14 ) — — — (14 ) Balance at June 30, 2019 $ 53 $ — $ 4 $ 2 $ 59

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Tax Jurisdictions and Years Currently under Audit Exam	In the U.S., fiscal years 2015 through 2016 are currently under exam by the Internal Revenue Service ("IRS") for certain legal entities. Additionally, the Company is currently under exam in the following major non-U.S. jurisdictions: Tax Jurisdiction Tax Years Covered Belgium 2015 - 2017 China 2008 - 2016 France 2010 - 2012; 2015 - 2016 Germany 2007 - 2016 Japan 2015 - 2018 United Kingdom 2012 - 2015

Pension and Postretirement Pl_2

Pension and Postretirement Plans (Tables)	9 Months Ended
	Jun. 30, 2019
Defined Benefit Plan [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, which are primarily recorded in selling, general and administrative expenses in the consolidated statements of income, are shown in the tables below in accordance with ASC 715, "Compensation – Retirement Benefits" (in millions): U.S. Pension Plans Three Months Ended June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Service cost $ — $ — $ — $ 1 Interest cost 25 23 75 69 Expected return on plan assets (46 ) (49 ) (138 ) (149 ) Net periodic benefit credit $ (21 ) $ (26 ) $ (63 ) $ (79 ) Non-U.S. Pension Plans Three Months Ended June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Service cost $ 5 $ 6 $ 16 $ 17 Interest cost 14 14 40 42 Expected return on plan assets (26 ) (29 ) (78 ) (86 ) Settlement loss — — 1 — Net periodic benefit credit $ (7 ) $ (9 ) $ (21 ) $ (27 ) Postretirement Benefits Three Months Ended June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Service cost $ — $ — $ 1 $ 1 Interest cost 2 1 5 4 Expected return on plan assets (2 ) (2 ) (7 ) (7 ) Net periodic benefit credit $ — $ (1 ) $ (1 ) $ (2 )

Debt and Financing Arrangemen_2

Debt and Financing Arrangements (Tables)	9 Months Ended
	Jun. 30, 2019
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 nine months ended June 30, 2019 and 2018 contained the following components (in millions): Three Months Ended June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Interest expense, net of capitalized interest costs $ 81 $ 106 $ 269 $ 307 Banking fees and bond cost amortization 7 8 20 23 Loss on debt extinguishment 60 — 60 — Interest income (28 ) (5 ) (41 ) (13 ) Net foreign exchange results for financing activities (1 ) (14 ) (6 ) (13 ) Net financing charges $ 119 $ 95 $ 302 $ 304

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Activity [Table Text Block]	A summary of the stock-based awards granted during the nine month periods ended June 30, 2019 and 2018 is presented below: Nine Months Ended June 30, 2019 2018 Number Granted Weighted Average Grant Date Fair Value Number Granted Weighted Average Grant Date Fair Value Stock options 1,741,510 $ 5.56 1,376,807 $ 7.04 Restricted stock/units 2,334,423 33.50 2,188,131 37.26 Performance shares 583,989 36.28 496,478 36.31
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Nine Months Ended 2019 2018 Expected life of option (years) 6.4 6.5 Risk-free interest rate 2.77% 2.28% Expected volatility of the Company’s stock 21.8% 23.7% Expected dividend yield on the Company’s stock 3.29% 2.78%
Schedule of share-based payment award, performance share, valuation assumptions [Table Text Block]	Nine Months Ended 2019 2018 Risk-free interest rate 2.76% 1.92% Expected volatility of the Company’s stock 22.9% 21.7%

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Jun. 30, 2019
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 June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Income Available to Ordinary Shareholders Income from continuing operations $ 141 $ 474 $ 488 $ 583 Income from discontinued operations 4,051 249 4,574 808 Basic and diluted income available to shareholders $ 4,192 $ 723 $ 5,062 $ 1,391 Weighted Average Shares Outstanding Basic weighted average shares outstanding 870.9 925.6 898.4 926.0 Effect of dilutive securities: Stock options, unvested restricted stock and unvested performance share awards 4.3 5.1 3.8 6.1 Diluted weighted average shares outstanding 875.2 930.7 902.2 932.1 Antidilutive Securities Options to purchase shares 0.7 2.1 1.9 1.5

Equity and Noncontrolling Int_2

Equity and Noncontrolling Interests (Tables)	9 Months Ended
	Jun. 30, 2019
Stockholders' Equity Note [Abstract]
Equity Attributable to Johnson Controls and Noncontrolling Interests	The following schedules present changes in consolidated equity attributable to Johnson Controls and noncontrolling interests (in millions, net of tax): Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Equity Attributable to Johnson Controls International plc Equity Attributable to Noncontrolling Interests Total Equity Equity Attributable to Johnson Controls International plc Equity Attributable to Noncontrolling Interests Total Equity Beginning balance, March 31, $ 20,036 $ 1,265 $ 21,301 $ 20,874 $ 1,006 $ 21,880 Total comprehensive income: Net income 4,192 84 4,276 723 71 794 Foreign currency translation adjustments (90 ) (4 ) (94 ) (557 ) (44 ) (601 ) Realized and unrealized gains (losses) on derivatives (5 ) (4 ) (9 ) 3 (1 ) 2 Other comprehensive loss (95 ) (8 ) (103 ) (554 ) (45 ) (599 ) Comprehensive income 4,097 76 4,173 169 26 195 Other changes in equity: Cash dividends—ordinary shares (208 ) — (208 ) (240 ) — (240 ) Repurchases and retirements of ordinary shares (4,122 ) — (4,122 ) (56 ) — (56 ) Change in noncontrolling interest share — — — — 4 4 Divestiture of Power Solutions 483 (295 ) 188 — — — Other, including options exercised 77 — 77 26 — 26 Ending balance, June 30 $ 20,363 $ 1,046 $ 21,409 $ 20,773 $ 1,036 $ 21,809 Nine Months Ended June 30, 2019 Nine Months Ended June 30, 2018 Equity Attributable to Johnson Controls International plc Equity Attributable to Noncontrolling Interests Total Equity Equity Attributable to Johnson Controls International plc Equity Attributable to Noncontrolling Interests Total Equity Beginning balance, September 30, $ 21,164 $ 1,294 $ 22,458 $ 20,447 $ 920 $ 21,367 Total comprehensive income: Net income 5,062 171 5,233 1,391 132 1,523 Foreign currency translation adjustments (103 ) 8 (95 ) (331 ) 3 (328 ) Realized and unrealized gains (losses) on derivatives 10 — 10 (2 ) 1 (1 ) Realized and unrealized losses on marketable securities — — — (2 ) — (2 ) Other comprehensive income (loss) (93 ) 8 (85 ) (335 ) 4 (331 ) Comprehensive income 4,969 179 5,148 1,056 136 1,192 Other changes in equity: Cash dividends—ordinary shares (683 ) — (683 ) (722 ) — (722 ) Dividends attributable to noncontrolling interests — (132 ) (132 ) — (43 ) (43 ) Repurchases and retirements of ordinary shares (5,122 ) — (5,122 ) (255 ) — (255 ) Change in noncontrolling interest share — — — — 23 23 Divestiture of Power Solutions 483 (295 ) 188 — — — Adoption of ASC 606 (45 ) — (45 ) — — — Adoption of ASU 2016-16 (546 ) — (546 ) — — — Adoption of ASU 2016-09 — — — 179 — 179 Other, including options exercised 143 — 143 68 — 68 Ending balance, June 30 $ 20,363 $ 1,046 $ 21,409 $ 20,773 $ 1,036 $ 21,809
Changes in Redeemable Noncontrolling Interests	The following schedule present changes in the redeemable noncontrolling interests for the three and nine months ended June 30, 2018 (in millions): Three Months Ended June 30, 2018 Beginning balance, March 31, 2018 $ 235 Net income 10 Foreign currency translation adjustments (13 ) Realized and unrealized losses on derivatives (1 ) Ending balance, June 30, 2018 $ 231 Nine Months Ended June 30, 2018 Beginning balance, September 30, 2017 $ 211 Net income 35 Foreign currency translation adjustments (3 ) Realized and unrealized losses on derivatives (9 ) Dividends (3 ) Ending balance, June 30, 2018 $ 231
Changes in Accumulated Other Comprehensive Income, Net of Tax	The following schedules present changes in accumulated other comprehensive income ("AOCI") attributable to Johnson Controls (in millions, net of tax): Three Months Ended June 30, 2019 2018 Foreign currency translation adjustments ("CTA") Balance at beginning of period $ (952 ) $ (255 ) Divestiture of Power Solutions 479 — Aggregate adjustment for the period (net of tax effect of $0) (90 ) (557 ) Balance at end of period (563 ) (812 ) Realized and unrealized gains (losses) on derivatives Balance at beginning of period 2 1 Divestiture of Power Solutions (net of tax effect of $1 and $0) 4 — Current period changes in fair value (net of tax effect of $(3) and $1) (4 ) 5 Reclassification to income (net of tax effect of $0 and $(2)) ** (1 ) (2 ) Balance at end of period 1 4 Realized and unrealized gains (losses) on marketable securities Balance at beginning of period — 2 Current period changes in fair value (net of tax effect of $0) — 1 Reclassification to income (net of tax effect of $0 and $(1)) — (1 ) Balance at end of period — 2 Pension and postretirement plans Balance at beginning of period (2 ) (2 ) Other changes — — Balance at end of period (2 ) (2 ) Accumulated other comprehensive loss, end of period $ (564 ) $ (808 ) Nine Months Ended June 30, 2019 2018 CTA Balance at beginning of period $ (939 ) $ (481 ) Divestiture of Power Solutions 479 — Aggregate adjustment for the period (net of tax effect of $0 and $1) * (103 ) (331 ) Balance at end of period (563 ) (812 ) Realized and unrealized gains (losses) on derivatives Balance at beginning of period (13 ) 6 Divestiture of Power Solutions (net of tax effect of $1 and $0) 4 — Current period changes in fair value (net of tax effect of $1 and $2) 4 7 Reclassification to income (net of tax effect of $3 and $(4)) ** 6 (9 ) Balance at end of period 1 4 Realized and unrealized gains (losses) on marketable securities Balance at beginning of period 8 4 Adoption of ASU 2016-01 *** (8 ) — Current period changes in fair value (net of tax effect of $0) — (1 ) Reclassification to income (net of tax effect of $(1)) **** — (1 ) Balance at end of period — 2 Pension and postretirement plans Balance at beginning of period (2 ) (2 ) Other changes — — Balance at end of period (2 ) (2 ) Accumulated other comprehensive loss, end of period $ (564 ) $ (808 ) * During the nine months ended June 30, 2018, $12 million of cumulative CTA was recognized as part of the divestiture-related gain recognized as part of the divestiture of Scott Safety. ** Refer to Note 15, "Derivative Instruments and Hedging Activities," of the notes to consolidated financial statements for disclosure of the line items in the consolidated statements of income affected by reclassifications from AOCI into income related to derivatives. *** As previously disclosed, during the quarter ended December 31, 2018, the Company adopted ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities." As a result the Company reclassified $8 million of unrealized gains on marketable securities to retained earnings as of October 1, 2018. **** During the nine months ended June 30, 2018, the Company sold certain marketable common stock for approximately $3 million . As a result, the Company recorded $2 million of realized gains within selling, general and administrative expenses.

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
	Jun. 30, 2019
Derivative Instruments [Line Items]
Outstanding Commodity Hedge Contracts	The Company had the following outstanding contracts to hedge forecasted commodity purchases for continuing and discontinued operations (in metric tons): Volume Outstanding as of Commodity June 30, 2019 September 30, 2018 Copper 3,357 3,175 Polypropylene — 15,868 Lead — 49,066 Aluminum 4,649 3,381 Tin — 3,076
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 June 30, September 30, June 30, September 30, 2019 2018 2019 2018 Other current assets Foreign currency exchange derivatives $ 4 $ 6 $ 6 $ 10 Commodity derivatives — 1 — — Other noncurrent assets Equity swap — — 59 63 Total assets $ 4 $ 7 $ 65 $ 73 Other current liabilities Foreign currency exchange derivatives $ 6 $ 10 $ 1 $ 2 Commodity derivatives 1 2 — — Liabilities held for sale Commodity derivatives — 12 — — Long-term debt Foreign currency denominated debt 2,640 3,149 — — Total liabilities $ 2,647 $ 3,173 $ 1 $ 2
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 June 30, September 30, June 30, September 30, 2019 2018 2019 2018 Gross amount recognized $ 69 $ 80 $ 2,648 $ 3,175 Gross amount eligible for offsetting (6 ) (12 ) (6 ) (12 ) Net amount $ 63 $ 68 $ 2,642 $ 3,163
Location and Amount of Gains and Losses Gross of Tax on Derivative Instruments and Related Hedge Items	The following table presents the pre-tax gains (losses) recorded in other comprehensive income (loss) related to cash flow hedges for the three and nine months ended June 30, 2019 and 2018 (in millions): Derivatives in ASC 815 Cash Flow Hedging Relationships Three Months Ended June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Foreign currency exchange derivatives $ (2 ) $ 6 $ 7 $ 7 Commodity derivatives (5 ) — (2 ) 2 Total $ (7 ) $ 6 $ 5 $ 9 The following table presents the location and amount of the pre-tax gains (losses) on cash flow hedges reclassified from AOCI into the Company’s consolidated statements of income for the three and nine months ended June 30, 2019 and 2018 (in millions): Derivatives in ASC 815 Cash Flow Hedging Relationships Location of Gain (Loss) Reclassified from AOCI into Income Three Months Ended Nine Months Ended 2019 2018 2019 2018 Foreign currency exchange derivatives Cost of sales $ 2 $ 1 $ 4 $ — Foreign currency exchange derivatives Income from discontinued operations — 1 — 2 Commodity derivatives Cost of sales — — (3 ) 3 Commodity derivatives Income from discontinued operations (1 ) 2 (10 ) 8 Total $ 1 $ 4 $ (9 ) $ 13 The following table presents the location and amount of pre-tax gains (losses) on derivatives not designated as hedging instruments recognized in the Company’s consolidated statements of income for the three and nine months ended June 30, 2019 and 2018 (in millions): 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 June 30, Nine Months Ended June 30, 2019 2018 2019 2018 Foreign currency exchange derivatives Cost of sales $ (3 ) $ (4 ) $ (9 ) $ (5 ) Foreign currency exchange derivatives Net financing charges (18 ) (32 ) (42 ) (29 ) Foreign currency exchange derivatives Income from discontinued operations (2 ) 5 52 4 Equity swap Selling, general and administrative 7 (3 ) 10 (10 ) Total $ (16 ) $ (34 ) $ 11 $ (40 )

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Jun. 30, 2019
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 June 30, 2019 and September 30, 2018 (in millions): Fair Value Measurements Using: Total as of June 30, 2019 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 $ 10 $ — $ 10 $ — Exchange traded funds (fixed income) 1 19 19 — — Other noncurrent assets Investments in marketable common stock 1 1 — — Deferred compensation plan assets 69 69 — — Exchange traded funds (fixed income) 1 138 138 — — Exchange traded funds (equity) 1 115 115 — — Equity swap 59 — 59 — Total assets $ 411 $ 342 $ 69 $ — Other current liabilities Foreign currency exchange derivatives $ 7 $ — $ 7 $ — Commodity derivatives 1 — 1 — Total liabilities $ 8 $ — $ 8 $ — Fair Value Measurements Using: Total as of September 30, 2018 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 $ 16 $ — $ 16 $ — Commodity derivatives 1 — 1 — Exchange traded funds (fixed income) 1 14 14 — — Other noncurrent assets Investments in marketable common stock 1 1 — — Deferred compensation plan assets 100 100 — — Exchange traded funds (fixed income) 1 148 148 — — Exchange traded funds (equity) 1 119 119 — — Equity swap 63 — 63 — Noncurrent assets held for sale Investments in marketable common stock 3 3 — — Total assets $ 465 $ 385 $ 80 $ — Other current liabilities Foreign currency exchange derivatives $ 12 $ — $ 12 $ — Commodity derivatives 2 — 2 — Liabilities held for sale Commodity derivatives 12 — 12 — Total liabilities $ 26 $ — $ 26 $ —

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Jun. 30, 2019
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 Nine Months Ended 2019 2018 2019 2018 Building Solutions North America $ 2,327 $ 2,246 $ 6,630 $ 6,355 Building Solutions EMEA/LA 922 926 2,707 2,748 Building Solutions Asia Pacific 691 681 1,932 1,864 Global Products 2,511 2,429 6,425 6,250 Total net sales $ 6,451 $ 6,282 $ 17,694 $ 17,217 Segment EBITA Three Months Ended Nine Months Ended 2019 2018 2019 2018 Building Solutions North America $ 300 $ 314 $ 807 $ 780 Building Solutions EMEA/LA 101 96 258 242 Building Solutions Asia Pacific 98 97 240 242 Global Products 333 435 774 949 Total segment EBITA $ 832 $ 942 $ 2,079 $ 2,213 Corporate expenses $ 70 $ (142 ) $ (233 ) $ (442 ) Amortization of intangible assets (93 ) (98 ) (288 ) (282 ) Restructuring and impairment costs (235 ) — (235 ) (154 ) Net mark-to-market adjustments 9 — 8 — Net financing charges (119 ) (95 ) (302 ) (304 ) Income from continuing operations before income taxes $ 464 $ 607 $ 1,029 $ 1,031

Guarantees (Tables)

Guarantees (Tables)	9 Months Ended
	Jun. 30, 2019
Guarantees [Abstract]
Changes in Carrying Amount of Product Warranty Liability	The changes in the carrying amount of the Company’s total product warranty liability for continuing operations, including extended warranties for which deferred revenue is recorded, for the nine months ended June 30, 2019 and 2018 were as follows (in millions): Nine Months Ended 2019 2018 Balance at beginning of period $ 315 $ 323 Accruals for warranties issued during the period 85 73 Accruals from acquisition and divestitures 2 1 Accruals related to pre-existing warranties (20 ) (21 ) Settlements made (in cash or in kind) during the period (79 ) (67 ) Currency translation 1 — Balance at end of period $ 304 $ 309

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Jun. 30, 2019
Related Party Transactions [Abstract]
Schedule of Related Party Transactions [Table Text Block]	The following table sets forth the amount of accounts receivable due from and payable to related parties in the consolidated statements of financial position for continuing operations (in millions): June 30, 2019 September 30, 2018 Receivable from related parties $ 55 $ 36 Payable to related parties 8 18

Financial Statements - Addition

Financial Statements - Additional Information (Detail) $ in Millions	Jun. 30, 2019USD ($)	Sep. 30, 2018USD ($)
Financial Statement Details [Line Items]
Number of Countries in which Entity Operates	150
Interest percentage minimum for investments in partially-owned affiliates to be accounted for by the equity method	20.00%
Restricted Cash and Cash Equivalents	$ 16	$ 15
Restricted Cash and Investments, Current		6
Restricted Cash and Cash Equivalents, Noncurrent		$ 9

New Accounting Standards Recent

New Accounting Standards Recently Adopted Accounting Pronouncements (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income from discontinued operations, net of tax (Note 4)	$ 4,051		$ 258	$ 4,598	$ 841
Revenue, Net	6,451		6,282	17,694	17,217
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	464		$ 607	1,029	$ 1,031
Accounts receivable - net	6,033			6,033		$ 5,622
Inventories	2,050			2,050		1,819
Assets held for sale	95			95		3,015
Other current assets	1,179			1,179		1,182
Property, plant and equipment - net	3,282			3,282		3,300
Noncurrent assets held for sale	59			59		5,188
Other noncurrent assets	1,787			1,787		3,070
Deferred revenue	1,389			1,389		1,326
Liabilities held for sale	46			46		1,791
Retained earnings	6,366			6,366		$ 6,604
Accounting Standards Update 2016-16 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax				546
Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax				0
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax				45
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts receivable - net	(32)			(32)
Inventories	(14)			(14)
Other current assets	(25)			(25)
Property, plant and equipment - net	40			40
Other noncurrent assets	29			29
Deferred revenue	9			9
Retained earnings	(11)			(11)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue, Net				1
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest				1
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Power Solutions | Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	77			667
Income from discontinued operations, net of tax (Note 4)	1			26
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts receivable - net	6,065			6,065
Inventories	2,064			2,064
Other current assets	1,204			1,204
Property, plant and equipment - net	3,242			3,242
Other noncurrent assets	1,758			1,758
Deferred revenue	1,380			1,380
Retained earnings	$ 6,377			6,377
Retained Earnings | Accounting Standards Update 2016-16 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax				546
Retained Earnings | Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax		$ (8)		(8)
Retained Earnings | Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax				$ 45

Acquisitions and Divestitures -

Acquisitions and Divestitures - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2019	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2016
Acquisitions And Discontinued Operations [Line Items]
Cash paid for business acquisition				$ 16	$ 24
Goodwill, Acquired During Period				10
Proceeds from business divestitures, net of cash divested				12	2,101
Reduction in goodwill related to business divestitures				23
Purchase price, net of cash acquired				16
Power Solutions
Acquisitions And Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	$ 13,200			13,200
Disposal Group, Discontinued Operations, Consideration, net	11,600			11,600
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	5,200			5,200
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	4,000
Scott Safety business [Member]
Acquisitions And Discontinued Operations [Line Items]
Proceeds from business divestitures, net of cash divested			$ 2,000
Reduction in goodwill related to business divestitures			1,200
Gain on sale of Scott Safety business			114
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax			84
Business Divestitures, Not Specific [Member]
Acquisitions And Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	$ 18			18
Proceeds from business divestitures, net of cash divested				12
Global Products | Business Divestitures, Not Specific [Member]
Acquisitions And Discontinued Operations [Line Items]
Proceeds from business divestitures, net of cash divested		$ 103
Reduction in goodwill related to business divestitures		$ 20
Global Products | Individually Immaterial Acquisitions
Acquisitions And Discontinued Operations [Line Items]
Cash paid for business acquisition					24
Goodwill, Acquired During Period				9	$ 12
Building Solutions EMEA/LA | Business Divestitures, Not Specific [Member]
Acquisitions And Discontinued Operations [Line Items]
Reduction in goodwill related to business divestitures				1
Building Solutions EMEA/LA | Individually Immaterial Acquisitions
Acquisitions And Discontinued Operations [Line Items]
Goodwill, Acquired During Period				$ 1
Tyco International Holding S.a.r.L. (TSarL) [Member]
Acquisitions And Discontinued Operations [Line Items]
Repayments of Debt			$ 1,900
Long-term Debt						$ 4,000

Discontinued Operations Discont

Discontinued Operations Discontinued Operations, Income Statement Disclosures (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations attributable to noncontrolling interests	$ 0		$ 9	$ 24	$ 33
Income from discontinued operations	$ 4,051		249	4,574	$ 808
Ireland statutory income tax rate	12.50%				12.50%
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount		$ 76
Discontinued Operations, Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 562		1,838	5,001	$ 5,813
Income from discontinued operations before income taxes	5,315		303	6,039	978
Provision for income taxes on discontinued operations	(1,264)		(45)	(1,441)	(137)
Income from discontinued operations attributable to noncontrolling interests	0		(9)	(24)	(33)
Income from discontinued operations	4,051		$ 249	4,574	$ 808
Power Solutions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	5,200			5,200
Proceeds from Divestiture of Businesses	13,200			13,200
Depreciation and Amortization, Discontinued Operations	21			117
Disposal Group, Discontinued Operations, Consideration, net	$ 11,600			$ 11,600

Discontinued Operations Disposa

Discontinued Operations Disposal Group - Assets Held For Sale (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2019	Sep. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale	$ 95	$ 3,015
Noncurrent assets held for sale	59	5,188
Liabilities held for sale	46	1,791
Noncurrent liabilities held for sale	0	207
Global Products
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of Long-Lived Assets to be Disposed of	$ 235
Power Solutions | Power Solutions | Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash		15
Accounts receivable - net		1,443
Inventories		1,405
Other current assets		152
Assets held for sale		3,015
Property, plant and equipment - net		2,871
Goodwill		1,092
Other intangible assets - net		161
Investments in Partially-Owed Affiliates		453
Other noncurrent assets		611
Noncurrent assets held for sale		5,188
Short-term debt		9
Current portion of long-term debt		25
Accounts payable		1,237
Accrued compensation and benefits		125
Other current liabilities		395
Liabilities held for sale		1,791
Long-term debt		31
Pension and postretirement benefits		101
Other noncurrent liabilities		75
Noncurrent liabilities held for sale		$ 207

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Oct. 01, 2018	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue, Net	$ 6,451,000,000	$ 6,282,000,000	$ 17,694,000,000	$ 17,217,000,000
Deferred revenue	(1,389,000,000)		(1,389,000,000)			$ (1,326,000,000)
Contract with Customer Asset Liability Net	(1,000,000)		(1,000,000)		$ (102,000,000)
Contract with Customer, Liability, Revenue Recognized	130,000,000		1,056,000,000
Revenue, Remaining Performance Obligation, Amount	$ 14,200,000,000		$ 14,200,000,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Explanation	60.00%		60.00%
Capitalized Contract Cost, Gross	$ 190,000,000		$ 190,000,000
Capitalized Contract Cost, Amortization	50,000,000		119,000,000
Capitalized Contract Cost, Impairment Loss			0
Products and Systems [Domain]
Disaggregation of Revenue [Line Items]
Revenue, Net	4,896,000,000		13,058,000,000
Services [Domain]
Disaggregation of Revenue [Line Items]
Revenue, Net	1,555,000,000		4,636,000,000
Building Solutions North America
Disaggregation of Revenue [Line Items]
Revenue, Net	2,327,000,000		6,630,000,000
Building Solutions North America | Products and Systems [Domain]
Disaggregation of Revenue [Line Items]
Revenue, Net	1,494,000,000		4,202,000,000
Building Solutions North America | Services [Domain]
Disaggregation of Revenue [Line Items]
Revenue, Net	833,000,000		2,428,000,000
Building Solutions EMEA/LA
Disaggregation of Revenue [Line Items]
Revenue, Net	922,000,000		2,707,000,000
Building Solutions EMEA/LA | Products and Systems [Domain]
Disaggregation of Revenue [Line Items]
Revenue, Net	464,000,000		1,297,000,000
Building Solutions EMEA/LA | Services [Domain]
Disaggregation of Revenue [Line Items]
Revenue, Net	458,000,000		1,410,000,000
Building Solutions Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, Net	691,000,000		1,932,000,000
Building Solutions Asia Pacific | Products and Systems [Domain]
Disaggregation of Revenue [Line Items]
Revenue, Net	427,000,000		1,134,000,000
Building Solutions Asia Pacific | Services [Domain]
Disaggregation of Revenue [Line Items]
Revenue, Net	264,000,000		798,000,000
Global Products
Disaggregation of Revenue [Line Items]
Revenue, Net	2,511,000,000		6,425,000,000
Global Products | Global Products- Building Management [Domain]
Disaggregation of Revenue [Line Items]
Revenue, Net	342,000,000		943,000,000
Global Products | Global Products- HVAC & Refrigeration Equipment [Domain]
Disaggregation of Revenue [Line Items]
Revenue, Net	1,869,000,000		4,628,000,000
Global Products | Global Products- Specialty [Domain]
Disaggregation of Revenue [Line Items]
Revenue, Net	300,000,000		854,000,000
Global Products | Products and Systems [Domain]
Disaggregation of Revenue [Line Items]
Revenue, Net	2,511,000,000		6,425,000,000
Global Products | Services [Domain]
Disaggregation of Revenue [Line Items]
Revenue, Net	0		0
Other Current Assets
Disaggregation of Revenue [Line Items]
Capitalized Contract Cost, Gross	100,000,000		100,000,000
Accounts Receivable [Member]
Disaggregation of Revenue [Line Items]
Contract with Customer, Asset, Net, Current	1,428,000,000		1,428,000,000		1,261,000,000
Other Noncurrent Assets
Disaggregation of Revenue [Line Items]
Contract with Customer, Asset, Net, Noncurrent	85,000,000		85,000,000		85,000,000
Capitalized Contract Cost, Gross	90,000,000		90,000,000
Deferred Revenue [Member]
Disaggregation of Revenue [Line Items]
Deferred revenue	(1,389,000,000)		(1,389,000,000)		(1,335,000,000)
Other Noncurrent Liabilities [Member]
Disaggregation of Revenue [Line Items]
Contract with Customer, Liability, Noncurrent	$ (125,000,000)		$ (125,000,000)		$ (113,000,000)

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Sep. 30, 2018
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 685	$ 606
Work-in-process	215	155
Finished goods	1,150	1,058
Inventories	$ 2,050	$ 1,819

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Details) $ in Millions	9 Months Ended
	Jun. 30, 2019USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 18,381
Business Acquisitions	10
Business Divestitures	(23)
Currency Translation and Other	(56)
Ending Balance	18,312
Building Technologies & Solutions | Building Solutions North America
Goodwill [Roll Forward]
Beginning Balance	9,603
Business Acquisitions	0
Business Divestitures	0
Currency Translation and Other	(5)
Ending Balance	9,598
Building Technologies & Solutions | Building Solutions EMEA/LA
Goodwill [Roll Forward]
Beginning Balance	1,950
Business Acquisitions	1
Business Divestitures	(1)
Currency Translation and Other	(40)
Ending Balance	1,910
Building Technologies & Solutions | Building Solutions Asia Pacific
Goodwill [Roll Forward]
Beginning Balance	1,235
Business Acquisitions	0
Business Divestitures	0
Currency Translation and Other	(9)
Ending Balance	1,226
Building Technologies & Solutions | Global Products
Goodwill [Roll Forward]
Beginning Balance	5,593
Business Acquisitions	9
Business Divestitures	(22)
Currency Translation and Other	(2)
Ending Balance	$ 5,578

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Goodwill Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2019	Sep. 30, 2018
Building Solutions EMEA/LA
Goodwill [Line Items]
Accumulated goodwill impairment		$ 47
Global Products
Goodwill [Line Items]
Goodwill, Transfers	$ 22

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2019	Sep. 30, 2018
Intangible Assets [Line Items]
Gross carrying amount, total intangible assets	$ 7,023	$ 7,222
Net, Total Intangible Assets	5,739	6,187
Finite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	4,627	4,716
Accumulated Amortization	(1,284)	(1,035)
Net, Total Amortized Intangible Assets	3,343	3,681
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying Amount, Gross and Net	2,396	2,506
Patented Technology
Finite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	1,316	1,317
Accumulated Amortization	(342)	(251)
Net, Total Amortized Intangible Assets	974	1,066
Customer Relationships
Finite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	2,745	2,941
Accumulated Amortization	(714)	(599)
Net, Total Amortized Intangible Assets	2,031	2,342
Miscellaneous
Finite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount	566	458
Accumulated Amortization	(228)	(185)
Net, Total Amortized Intangible Assets	338	273
Trademarks/trade names
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying Amount, Gross and Net	2,306	2,386
Miscellaneous
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying Amount, Gross and Net	$ 90	$ 120

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Other Intangible Assets Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 93	$ 98	$ 288	$ 282
Future amortization expense, 2020	399		399
Future amortization expense, 2021	389		389
Future amortization expense, 2022	378		378
Future amortization expense, 2023	365		365
Future amortization expense, 2024	$ 352		$ 352

Significant Restructuring Cos_5

Significant Restructuring Costs Change in Restructuring Reserve - 2018 Restructuring Plan (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	$ 235	$ 0	$ 154	$ 235	$ 154
2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs						$ 263
Restructuring Reserve, Settled without Cash						(42)
Restructuring Reserve	106			106		174
Payments for Restructuring				(64)		(47)
Employee Severance | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs						209
Restructuring Reserve, Settled without Cash						0
Restructuring Reserve	101			101		164
Payments for Restructuring				(59)		(45)
Fixed Asset Impairment | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs						42
Restructuring Reserve, Settled without Cash						(42)
Restructuring Reserve	0			0		0
Payments for Restructuring				0		0
Other Restructuring | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs						12
Restructuring Reserve, Settled without Cash						0
Restructuring Reserve	$ 5			5		10
Payments for Restructuring				(5)		(2)
Global Products | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs						113
Building Solutions EMEA/LA | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs						56
Corporate Segment | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs						50
Building Solutions Asia Pacific | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs						16
Building Solutions North America | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs						20
Continuing Operations | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs						255
Discontinued Operations | Power Solutions | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs						$ 8
Transfer To Held for Sale [Member] | Power Solutions | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash				(4)
Transfer To Held for Sale [Member] | Power Solutions | Employee Severance | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash				(4)
Transfer To Held for Sale [Member] | Power Solutions | Fixed Asset Impairment | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash				0
Transfer To Held for Sale [Member] | Power Solutions | Other Restructuring | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash				$ 0

Significant Restructuring Cos_6

Significant Restructuring Costs Change in Restructuring Reserve - 2017 Restructuring Plan (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	$ 235	$ 0	$ 154	$ 235	$ 154
2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs							$ 367
Payments for Restructuring				(6)		$ (158)	(75)
Restructuring Reserve, Settled without Cash				(2)		(1)	(78)
Adjustment to restructuring reserves							25
Restructuring Reserve	69			69		80	239
Employee Severance | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs							276
Payments for Restructuring				(5)		(152)	(75)
Restructuring Reserve, Settled without Cash				0		0	0
Adjustment to restructuring reserves							25
Restructuring Reserve	66			66		74	226
Fixed Asset Impairment | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs							77
Payments for Restructuring				0		0	0
Restructuring Reserve, Settled without Cash				0		0	(77)
Adjustment to restructuring reserves							0
Restructuring Reserve	0			0		0	0
Other Restructuring | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs							14
Payments for Restructuring				(1)		(6)	0
Restructuring Reserve, Settled without Cash				0		0	(1)
Adjustment to restructuring reserves							0
Restructuring Reserve	6			6		7	13
Currency Translation | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs							0
Payments for Restructuring				0		0	0
Restructuring Reserve, Settled without Cash				(2)		(1)	0
Adjustment to restructuring reserves							0
Restructuring Reserve	$ (3)			(3)		$ (1)	0
Corporate Segment | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs							166
Building Technologies & Solutions EMEA LA [Member] | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs							74
Building Solutions North America | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs							59
Building Solutions Asia Pacific | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs							16
Global Products | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs							32
Continuing Operations | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs							347
Power Solutions | Transfer To Held for Sale [Member] | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash				(3)
Power Solutions | Transfer To Held for Sale [Member] | Employee Severance | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash				(3)
Power Solutions | Transfer To Held for Sale [Member] | Fixed Asset Impairment | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash				0
Power Solutions | Transfer To Held for Sale [Member] | Other Restructuring | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash				0
Power Solutions | Transfer To Held for Sale [Member] | Currency Translation | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash				$ 0
Power Solutions | Discontinued Operations | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs							$ 20

Significant Restructuring Cos_7

Significant Restructuring Costs Change in Restructuring Reserve - 2016 Restructuring Plan (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	$ 235	$ 0	$ 154	$ 235	$ 154
2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								$ 222
2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								620
Restructuring Reserve	59			59		$ 73	$ 92	445
Payments for Restructuring				(14)		(19)	(88)	(32)
Restructuring Reserve, Settled without Cash							1	(221)
Adjustment to restructuring reserves							(25)
Employee Severance | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								368
Restructuring Reserve	53			53		67	84	414
Payments for Restructuring				(14)		(17)	(86)	(32)
Restructuring Reserve, Settled without Cash							0	0
Adjustment to restructuring reserves							(25)
Fixed Asset Impairment | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								190
Restructuring Reserve	0			0		0	0	0
Payments for Restructuring				0		0	0	0
Restructuring Reserve, Settled without Cash							0	(190)
Adjustment to restructuring reserves							0
Other Restructuring | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								62
Restructuring Reserve	4			4		4	6	30
Payments for Restructuring				0		(2)	(2)	0
Restructuring Reserve, Settled without Cash							0	(32)
Adjustment to restructuring reserves							0
Currency Translation | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								0
Restructuring Reserve	$ 2			2		2	2	1
Payments for Restructuring				$ 0		$ 0	0	0
Restructuring Reserve, Settled without Cash							1	1
Adjustment to restructuring reserves							0
Tyco merger [Member] | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								78
Restructuring Reserve								56
Restructuring Reserve, Settled without Cash							(22)
Tyco merger [Member] | Employee Severance | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								78
Restructuring Reserve, Settled without Cash							(22)
Tyco merger [Member] | Fixed Asset Impairment | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								0
Restructuring Reserve, Settled without Cash							0
Tyco merger [Member] | Other Restructuring | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								0
Restructuring Reserve, Settled without Cash							0
Tyco merger [Member] | Currency Translation | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								0
Restructuring Reserve, Settled without Cash							0
Building Solutions EMEA/LA | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								17
Corporate Segment | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								161
Global Products | 2016 Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								44
Adient spin-off [Member] | Transfer To Held for Sale [Member] | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash							(216)
Adient spin-off [Member] | Transfer To Held for Sale [Member] | Employee Severance | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash							(194)
Adient spin-off [Member] | Transfer To Held for Sale [Member] | Fixed Asset Impairment | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash							0
Adient spin-off [Member] | Transfer To Held for Sale [Member] | Other Restructuring | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash							(22)
Adient spin-off [Member] | Transfer To Held for Sale [Member] | Currency Translation | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash							0
Scott Safety business [Member] | Transfer To Held for Sale [Member] | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash							(3)
Scott Safety business [Member] | Transfer To Held for Sale [Member] | Employee Severance | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash							(3)
Scott Safety business [Member] | Transfer To Held for Sale [Member] | Fixed Asset Impairment | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash							0
Scott Safety business [Member] | Transfer To Held for Sale [Member] | Other Restructuring | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash							0
Scott Safety business [Member] | Transfer To Held for Sale [Member] | Currency Translation | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash							$ 0
Power Solutions and Adient [Member] | Discontinued Operations | 2016 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs								$ 398

Significant Restructuring Cos_8

Significant Restructuring Costs - Additional Information (Detail) $ in Millions	3 Months Ended			9 Months Ended		36 Months Ended
	Jun. 30, 2019USD ($)PlantEmployees	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)	Jun. 30, 2019USD ($)PlantEmployees	Jun. 30, 2018USD ($)	Sep. 30, 2018PlantEmployees
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs | $	$ 235	$ 0	$ 154	$ 235	$ 154
Number of employees to be severed						11,300
Number of employees severed	5,200			5,200
Number of plants to be closed | Plant						12
Plants closed | Plant	10			10
Building Technologies & Solutions
Restructuring Cost and Reserve [Line Items]
Number of employees to be severed						9,100
Number of plants to be closed | Plant						12
Corporate Segment
Restructuring Cost and Reserve [Line Items]
Number of employees to be severed						2,200

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018	Sep. 30, 2016
Income Taxes, Additional Information [Line Items]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ 199						$ 108
Income tax provision	$ 239		$ 61		$ 394	$ 314	$ (108)
Expected Rate on Deferred Tax Reversals	21.00%						24.50%
Effective income tax rate	52.00%		10.00%		38.00%	30.00%
Ireland statutory income tax rate	12.50%					12.50%
Gross tax effected unrecognized tax benefits							$ 2,358
Amount of unrecognized tax benefits which may impact effective tax rate							2,225
Total net accrued interest, net of tax benefit							$ 119
Income Tax Examination, Penalties and Interest Accrued	$ 49				$ 49
Estimated benefit to tax expense	27
Restructuring and impairment costs	235		$ 0	$ 154	235	$ 154
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount		$ 76
Release of tax indemnification reserve	226
Net actuarial gain					$ 8	$ 0
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Restructuring Charges, Amount				23
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities				25
2016 Restructuring Plan [Member]
Income Taxes, Additional Information [Line Items]
Restructuring and impairment costs								$ 620
2016 Restructuring Plan [Domain]
Income Taxes, Additional Information [Line Items]
Restructuring and impairment costs								222
Global Products
Income Taxes, Additional Information [Line Items]
Impairment of Long-Lived Assets to be Disposed of	235
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	$ 53
Global Products | 2016 Restructuring Plan [Domain]
Income Taxes, Additional Information [Line Items]
Restructuring and impairment costs								$ 44
Scott Safety business [Member]
Income Taxes, Additional Information [Line Items]
Gain on sale of Scott Safety business				114
Tax effect of gain on sale of Scott Safety business				$ 30
IRELAND
Income Taxes, Additional Information [Line Items]
Ireland statutory income tax rate	12.50%		12.50%		12.50%	12.50%

Income Taxes - Tax Jurisdiction

Income Taxes - Tax Jurisdictions and Years Currently under Audit Exam (Details)	9 Months Ended
	Jun. 30, 2019
UNITED STATES
Income Tax Examination [Line Items]
Tax years currently under audit exam	2015 2016
BELGIUM
Income Tax Examination [Line Items]
Tax years currently under audit exam	2015 2016 2017
CHINA
Income Tax Examination [Line Items]
Tax years currently under audit exam	2008 2009 2010 2011 2012 2013 2014 2015 2016
France
Income Tax Examination [Line Items]
Tax years currently under audit exam	2010 2011 2012 2015 2016
Germany
Income Tax Examination [Line Items]
Tax years currently under audit exam	2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
JAPAN
Income Tax Examination [Line Items]
Tax years currently under audit exam	2015 2016 2017 2018
United Kingdom
Income Tax Examination [Line Items]
Tax years currently under audit exam	2012 2013 2014 2015

Income Taxes Changes in Tax Leg

Income Taxes Changes in Tax Legislation and Statutory Tax Rates (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018
Change in Tax Legislation and Statutory Tax Rates [Line Items]
Income tax provision	$ 239	$ 61		$ 394	$ 314	$ (108)
Transition Tax on Deemed Repatriated Earnings [Member]
Change in Tax Legislation and Statutory Tax Rates [Line Items]
Income tax provision			$ 305			216
Remeasurement of U.S. deferred tax assets and liabilities [Member]
Change in Tax Legislation and Statutory Tax Rates [Line Items]
Income tax provision			$ (101)			$ (108)

Pension and Postretirement Pl_3

Pension and Postretirement Plans - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (gain) loss			$ (8)	$ 0
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	1	1
Interest cost	2	1	5	4
Expected return on plan assets	(2)	(2)	(7)	(7)
Net periodic benefit credit	0	(1)	(1)	(2)
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	1
Interest cost	25	23	75	69
Expected return on plan assets	(46)	(49)	(138)	(149)
Net periodic benefit credit	(21)	(26)	(63)	(79)
Non-U.S. | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	6	16	17
Interest cost	14	14	40	42
Expected return on plan assets	(26)	(29)	(78)	(86)
Settlement (gain) loss	0	0	1	0
Net periodic benefit credit	$ (7)	$ (9)	$ (21)	$ (27)

Debt and Financing Arrangemen_3

Debt and Financing Arrangements - Additional Information (Detail) € in Millions, $ in Millions, ¥ in Billions	3 Months Ended				9 Months Ended
	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2019EUR (€)	Jun. 30, 2019JPY (¥)	Jun. 30, 2018USD ($)	Jun. 30, 2019EUR (€)	Mar. 31, 2019JPY (¥)	Sep. 30, 2016USD ($)
Debt Instrument [Line Items]
Debt tender offer to purchase up to $1.5 billion in aggregate principal	$ 1,500
Total Consideration of Debt Tender Offer	1,600
Gain (Loss) on Extinguishment of Debt	60		$ 0		$ 60			$ 0
Notes Payable to Banks [Member] | 5.25 percent due 2041 [Domain]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	$ 2.5				$ 2.5
Debt Instrument, Interest Rate, Stated Percentage	5.25%				5.25%				5.25%
Notes Payable to Banks [Member] | Floating rate term loan [Domain]
Debt Instrument [Line Items]
Repayments of Debt | ¥							¥ 10
Debt Instrument, Face Amount | ¥										¥ 35
Notes Payable to Banks [Member] | 1.375 percent due 2025 [Domain]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount | €									€ 4.7
Debt Instrument, Interest Rate, Stated Percentage	1.375%				1.375%				1.375%
Notes Payable to Banks [Member] | 3.9 percent due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount		$ 12
Debt Instrument, Interest Rate, Stated Percentage		3.90%								3.90%
Tyco International Holding S.a.r.L. (TSarL) [Member]
Debt Instrument [Line Items]
Repayments of Debt				$ 1,900
Long-term Debt											$ 4,000
Tyco International Holding S.a.r.L. (TSarL) [Member] | Notes Payable to Banks [Member] | $364 million due March 2020 [Domain]
Debt Instrument [Line Items]
Repayments of Debt					$ 364
Tyco International Holding S.a.r.L. (TSarL) [Member] | Notes Payable to Banks [Member] | $250 million USD expiring in Mar 2020 [Member]
Debt Instrument [Line Items]
Repayments of Debt					250
Tyco International Holding S.a.r.L. (TSarL) [Member] | Notes Payable to Banks [Member] | 215 million euro floating due July 2019 [Domain]
Debt Instrument [Line Items]
Repayments of Debt | €						€ 215
Notes Payable to Banks [Member] | $750 million term loan due earlier of Jan 2020 or 5 days after PS Close [Member]
Debt Instrument [Line Items]
Repayments of Debt					$ 750
Revolving Credit Facility [Member] | Floating rate term loan [Domain]
Debt Instrument [Line Items]
Debt Instrument, Term	5 years
Revolving Credit Facility [Member] | 250 million USD maturing in Mar 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Term		364 days
Line of Credit Facility, Borrowing Capacity, Expired		$ 250
Revolving Credit Facility [Member] | $250 million USD expiring in Mar 2020 [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 250
Revolving Credit Facility [Member] | 150 million USD maturing in Feb 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Term		364 days
Line of Credit Facility, Borrowing Capacity, Expired		$ 150
Revolving Credit Facility [Member] | $150 million USD expiring in February 2020 [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 150
Revolving Credit Facility [Member] | 200 million USD maturing in Jan 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Term		364 days
Line of Credit Facility, Borrowing Capacity, Expired		$ 200
Revolving Credit Facility [Member] | $350 million USD expiring in Jan 2020 [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 350
Revolving Credit Facility [Member] | Tyco International Holding S.a.r.L. (TSarL) [Member] | $1.25 billion due August 2020 [Domain]
Debt Instrument [Line Items]
Line of Credit, Borrowing Capacity, Terminated	$ 1,250
Revolving Credit Facility [Member] | Tyco International Holding S.a.r.L. (TSarL) [Member] | $250 million USD expiring in Mar 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Term		364 days

Debt and Financing Arrangemen_4

Debt and Financing Arrangements - Components of Net Financing Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Debt Disclosure [Abstract]
Interest expense, net of capitalized interest costs	$ 81	$ 106	$ 269	$ 307
Banking fees and bond cost amortization	7	8	20	23
Loss on debt extinguishment	60	0	60	0
Interest income	(28)	(5)	(41)	(13)
Net foreign exchange results for financing activities	(1)	(14)	(6)	(13)
Net financing charges	$ 119	$ 95	$ 302	$ 304

Stock-Based Compensation (Detai

Stock-Based Compensation (Details) - $ / shares	9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life of option (years)	6 years 4 months 24 days	6 years 6 months
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, number granted	1,741,510	1,376,807
Stock options, weighted average grant date fair value	$ 5.56	$ 7.04
Risk-free interest rate	2.77%	2.28%
Expected volatility of the Company's stock	21.80%	23.70%
Expected dividend yield on the Company's stock	3.29%	2.78%
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Stock options | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	2 years
Stock options | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Restricted stock/units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Equity instruments other than options, number granted	2,334,423	2,188,131
Equity instruments other than options, weighted average grant date fair value	$ 33.50	$ 37.26
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Equity instruments other than options, number granted	583,989	496,478
Equity instruments other than options, weighted average grant date fair value	$ 36.28	$ 36.31
Risk-free interest rate	2.76%	1.92%
Expected volatility of the Company's stock	22.90%	21.70%

Earnings Per Share - Earnings P

Earnings Per Share - Earnings Per Share (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Income from continuing operations	$ 141	$ 474	$ 488	$ 583
Loss from discontinued operations	4,051	249	4,574	808
Basic and diluted income available to shareholders	$ 4,192	$ 723	$ 5,062	$ 1,391
Weighted Average Shares Outstanding
Basic weighted average shares outstanding	870.9	925.6	898.4	926
Effect of dilutive securities:
Stock options, unvested restricted stock and unvested performance share awards	4.3	5.1	3.8	6.1
Diluted weighted average shares outstanding	875.2	930.7	902.2	932.1
Antidilutive Securities
Options to purchase shares	0.7	2.1	1.9	1.5

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - $ / shares	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Dividend declared	$ 0.26	$ 0.26	$ 0.78	$ 0.78

Equity and Noncontrolling Int_3

Equity and Noncontrolling Interests - Equity Attributable to Johnson Controls and Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 20,036	$ 21,164	$ 20,874	$ 21,164	$ 20,447
Beginning balance		1,294		1,294
Beginning balance		22,458		22,458
Net income (loss) attributable to Johnson Controls	4,192		723	5,062	1,391
Foreign currency translation adjustments	(90)		(557)
Foreign currency translation adjustments	(94)		(614)	(95)	(331)
Realized and unrealized gains (losses) on derivatives	(9)		1	10	(10)
Realized and unrealized losses on marketable securities	0		0	0	(2)
Other comprehensive loss	(103)		(613)	(85)	(343)
Comprehensive income attributable to Johnson Controls	4,097		169	4,969	1,056
Comprehensive income attributable to noncontrolling interests	76		22	179	159
Total comprehensive income	4,173		191	5,148	1,215
Cash dividends - ordinary shares	(208)		(240)	(683)	(722)
Repurchases and retirements of ordinary shares	(4,122)			(5,122)
Repurchase of ordinary shares	87		56	1,087	255
Other, including options exercised	77		26	143	68
Ending balance	20,363		20,773	20,363	20,773
Ending balance	1,046			1,046
Ending balance	21,409			21,409
Equity Attributable to Johnson Controls
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	20,036	21,164	20,874	21,164	20,447
Net income (loss) attributable to Johnson Controls	4,192		723	5,062	1,391
Foreign currency translation adjustments	(90)		(557)		(331)
Foreign currency translation adjustments				(103)
Realized and unrealized gains (losses) on derivatives	(5)		3	10	(2)
Realized and unrealized losses on marketable securities				0	(2)
Other comprehensive income (loss)	(95)		(554)	(93)	(335)
Comprehensive income attributable to Johnson Controls	4,097		169	4,969	1,056
Cash dividends - ordinary shares	(208)		(240)	(683)	(722)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders				0	0
Repurchases and retirements of ordinary shares	(4,122)			(5,122)
Repurchase of ordinary shares			56		255
Change In noncontrolling interest share	0		0	0	0
Shareholders' equity, divestiture of Power Solutions	483			483
Divestiture of Power Solutions			0		0
Other, including options exercised	77		26	143	68
Ending balance	20,363		20,773	20,363	20,773
Equity Attributable to Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,265	1,294	1,006	1,294	920
Income attributable to noncontrolling interests	84		71	171	132
Foreign currency translation adjustments	(4)		(44)	8	3
Realized and unrealized gains on derivatives	(4)		(1)	0	1
Realized and unrealized gains on marketable securities				0	0
Other comprehensive income (loss)	(8)		(45)	8	4
Comprehensive income attributable to noncontrolling interests	76		26	179	136
Cash dividends - ordinary shares	0		0	0	0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders				(132)	(43)
Repurchase of ordinary shares	0		0	0	0
Change In noncontrolling interest share	0		4	0	23
Shareholders' equity, divestiture of Power Solutions	(295)			295
Divestiture of Power Solutions			0		0
Other, including options exercised	0		0	0	0
Ending balance	1,046		1,036	1,046	1,036
Total Equity Excluding Redeemable Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	21,301	22,458	21,880	22,458	21,367
Net income	4,276		794	5,233	1,523
Foreign currency translation adjustments	(94)		(601)	(95)	(328)
Realized and unrealized gains (losses) on derivatives	(9)		2	10	(1)
Realized and unrealized losses on marketable securities				0	(2)
Other comprehensive loss	(103)		(599)	(85)	(331)
Total comprehensive income	4,173		195	5,148	1,192
Cash dividends - ordinary shares	(208)		(240)	(683)	(722)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders				(132)	(43)
Repurchases and retirements of ordinary shares	(4,122)			(5,122)
Repurchase of ordinary shares			56		255
Change In noncontrolling interest share	0		4	0	23
Shareholders' equity, divestiture of Power Solutions	188			188
Divestiture of Power Solutions			0		0
Other, including options exercised	77		26	143	68
Ending balance	$ 21,409		$ 21,809	21,409	21,809
Accounting Standards Update 2016-09 [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect on Retained Earnings, Net of Tax					179
Accounting Standards Update 2016-09 [Member] | Equity Attributable to Johnson Controls
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect on Retained Earnings, Net of Tax				0	179
Accounting Standards Update 2016-09 [Member] | Equity Attributable to Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect on Retained Earnings, Net of Tax				0	0
Accounting Standards Update 2016-09 [Member] | Total Equity Excluding Redeemable Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect on Retained Earnings, Net of Tax				0	179
Accounting Standards Update 2016-16 [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect on Retained Earnings, Net of Tax				(546)
Accounting Standards Update 2016-16 [Member] | Equity Attributable to Johnson Controls
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect on Retained Earnings, Net of Tax		(546)		(546)	0
Accounting Standards Update 2016-16 [Member] | Equity Attributable to Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect on Retained Earnings, Net of Tax				0	0
Accounting Standards Update 2016-16 [Member] | Total Equity Excluding Redeemable Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect on Retained Earnings, Net of Tax				(546)	0
Accounting Standards Update 2014-09 [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect on Retained Earnings, Net of Tax				(45)
Accounting Standards Update 2014-09 [Member] | Equity Attributable to Johnson Controls
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect on Retained Earnings, Net of Tax		$ (45)		(45)	0
Accounting Standards Update 2014-09 [Member] | Equity Attributable to Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect on Retained Earnings, Net of Tax				0	0
Accounting Standards Update 2014-09 [Member] | Total Equity Excluding Redeemable Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect on Retained Earnings, Net of Tax				$ (45)	$ 0

Equity and Noncontrolling Int_4

Equity and Noncontrolling Interests Equity and Noncontrolling Interests - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				9 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018	May 01, 2019	Mar. 31, 2019	Sep. 30, 2018	Sep. 30, 2016
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount		$ 1,000		$ 1,000				$ 8,500
Share tender offer to purchase up to $4.0 billion of ordinary shares							$ 4,000
Share tender offer, price per share	$ 39.25
Share Tender Offer, Accepted Shares	102
Stock Repurchased and Retired During Period, Value					$ 4,035
Ordinary shares, par value	$ 0.01				$ 0.01				$ 0.01
Repurchase of ordinary shares	$ 87		$ 56		$ 1,087	$ 255
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 5,400				5,400
Deferred tax asset from stock options exercised and restricted stock vestings				$ 179
Post Merger Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount										$ 1,000
Parent
Equity, Class of Treasury Stock [Line Items]
Repurchase of ordinary shares			$ 56			255
Accounting Standards Update 2014-09 [Member]
Equity, Class of Treasury Stock [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax					45
Accounting Standards Update 2014-09 [Member] | Parent
Equity, Class of Treasury Stock [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax		45			45	0
Accounting Standards Update 2016-16 [Member]
Equity, Class of Treasury Stock [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax					546
Accounting Standards Update 2016-16 [Member] | Parent
Equity, Class of Treasury Stock [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax		$ 546			$ 546	$ 0
Minimum [Member]
Equity, Class of Treasury Stock [Line Items]
Share tender offer, price per share	$ 36
Maximum [Member]
Equity, Class of Treasury Stock [Line Items]
Share tender offer, price per share	$ 40

Equity and Noncontrolling Int_5

Equity and Noncontrolling Interests - Changes in Redeemable Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017
Stockholders' Equity Attributable to Redeemable Noncontrolling Interest [Roll Forward]
Realized and unrealized gains (losses) on derivatives	$ (9)	$ 1	$ 10	$ (10)
Parent
Stockholders' Equity Attributable to Redeemable Noncontrolling Interest [Roll Forward]
Realized and unrealized gains (losses) on derivatives	$ (5)	3	$ 10	(2)
Redeemable Noncontrolling Interests [Member]
Stockholders' Equity Attributable to Redeemable Noncontrolling Interest [Roll Forward]
Beginning balance		231		231	$ 235	$ 211
Net income		10		35
Foreign currency translation adjustments		(13)		(3)
Realized and unrealized gains (losses) on derivatives		(1)		(9)
Dividends				(3)
Ending balance		$ 231		$ 231	$ 235	$ 211

Equity and Noncontrolling Int_6

Equity and Noncontrolling Interests - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended					9 Months Ended
	Jun. 30, 2019		Dec. 31, 2018	Jun. 30, 2018		Jun. 30, 2019		Jun. 30, 2018		Mar. 31, 2019	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	$ 1			$ 4		$ 1		$ 4		$ 2		$ 1
Foreign currency translation adjustments
Balance at beginning of period	(952)			(255)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	(90)			(557)
Balance at end of period	(563)			(812)		(563)		(812)
Realized and unrealized gains (losses) on derivatives
Current period changes in fair value	(9)			1		10		(10)
Realized and unrealized gains (losses) on marketable securities
Balance at beginning of period	0			2
Current period changes in fair value	0			1
Balance at end of period	0			2		0		2
Reclassification to income	0			(1)		0		(1)
Reclassification to income, tax effect				(1)		0		(1)
Pension and postretirement plans
Balance at beginning of period	(2)			(2)
Other changes	0			0
Balance at end of period	(2)			(2)		(2)		(2)
Accumulated other comprehensive loss	(564)			(808)		(564)		(808)			$ (946)
Proceeds from Sale and Maturity of Marketable Securities								3
Marketable Securities, Realized Gain (Loss)								2
Foreign currency translation adjustments
Foreign currency translation adjustments
Balance at beginning of period			$ (939)			(939)		(481)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent						(103)		(331)
Balance at end of period	(563)			(812)		(563)		(812)
Aggregate adjustment for period, tax effect	0	[1]		0	[1]	0		1
Realized and unrealized gains (losses) on derivatives
Realized and unrealized gains (losses) on derivatives
Current period changes in fair value	(4)			5		4		7
Reclassification to income	(1)			(2)		6		(9)
Current period changes in fair value, tax effect	(3)			1		1		2
Reclassifcation to income, tax effect	0	[2]		(2)	[2]	3	[1]	(4)	[1]
Realized and unrealized gains (losses) on marketable securities
Realized and unrealized gains (losses) on marketable securities
Balance at beginning of period			8			8		4
Current period changes in fair value						0		(1)
Balance at end of period	0			2		0		2
Current period changes in fair value, tax effect						0		0
Pension and postretirement plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax						0		0
Pension and postretirement plans
Balance at beginning of period			(2)			(2)		(2)
Balance at end of period	(2)			(2)		(2)		(2)
Scott Safety business [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax								12
Accounting Standards Update 2016-01 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax						0
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member] | Realized and unrealized gains (losses) on derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	1			4		1		4			$ (13)		$ 6
Retained Earnings | Accounting Standards Update 2016-01 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax			$ 8			8
AOCI Attributable to Parent [Member] | Accounting Standards Update 2016-01 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax						(8)		0
Power Solutions
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	479			0
Realized and unrealized gains (losses) on derivatives
Reclassification to income	(4)			0
Power Solutions | Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax						479		0
Power Solutions | Realized and unrealized gains (losses) on derivatives
Realized and unrealized gains (losses) on derivatives
Current period changes in fair value						4		0
Current period changes in fair value, tax effect	$ 1			$ 0		$ 1		$ 0
[1]	* During the nine months ended June 30, 2018, $12 million of cumulative CTA was recognized as part of the divestiture-related gain recognized as part of the divestiture of Scott Safety.
[2]	** Refer to Note 15, "Derivative Instruments and Hedging Activities," of the notes to consolidated financial statements for disclosure of the line items in the consolidated statements of income affected by reclassifications from AOCI into income related to derivatives. *** As previously disclosed, during the quarter ended December 31, 2018, the Company adopted ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities." As a result the Company reclassified $8 million of unrealized gains on marketable securities to retained earnings as of October 1, 2018. **** During the nine months ended June 30, 2018, the Company sold certain marketable common stock for approximately $3 million . As a result, the Company recorded $2 million of realized gains within selling, general and administrative expenses.

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Location and Fair Values of Derivative Instruments and Hedging Activities (Detail) € in Millions, shares in Millions, $ in Millions, ¥ in Billions	9 Months Ended
	Jun. 30, 2019USD ($)Tshares	Jun. 30, 2019EUR (€)Tshares	Jun. 30, 2019JPY (¥)Tshares	Sep. 30, 2018USD ($)TSwapshares	Sep. 30, 2018EUR (€)TSwapshares	Sep. 30, 2018JPY (¥)TSwapshares
Derivative Instruments [Line Items]
Hedge Percentage For Foreign Exchange Transactional Exposures Minimum	70.00%
Hedge Percentage For Foreign Exchange Transactional Exposures Maximum	90.00%
Number of Interest Rate Derivatives Held | Swap				0	0	0
Derivative, amount of hedged ordinary shares | shares	1.4	1.4	1.4	1.8	1.8	1.8
Derivative assets	$ 69			$ 80
Derivative liabilities	$ 2,648			$ 3,175
Copper [Member]
Derivative Instruments [Line Items]
Derivative, Nonmonetary Notional Amount | T	3,357	3,357	3,357	3,175	3,175	3,175
Polypropylene [Member]
Derivative Instruments [Line Items]
Derivative, Nonmonetary Notional Amount | T	0	0	0	15,868	15,868	15,868
Lead [Member]
Derivative Instruments [Line Items]
Derivative, Nonmonetary Notional Amount | T	0	0	0	49,066	49,066	49,066
Aluminum [Member]
Derivative Instruments [Line Items]
Derivative, Nonmonetary Notional Amount | T	4,649	4,649	4,649	3,381	3,381	3,381
Tin [Member]
Derivative Instruments [Line Items]
Derivative, Nonmonetary Notional Amount | T	0	0	0	3,076	3,076	3,076
Equity swap
Derivative Instruments [Line Items]
Derivative, Amount of Hedged Item	$ 60			$ 73
Foreign Currency Denominated Debt [Member]
Derivative Instruments [Line Items]
Notional amount | ¥			¥ 25			¥ 35
Designated as Hedging Instrument
Derivative Instruments [Line Items]
Derivative assets	4			7
Derivative liabilities	2,647			3,173
Designated as Hedging Instrument | Other Current Assets | Foreign Currency Exchange Derivatives
Derivative Instruments [Line Items]
Derivative assets	4			6
Designated as Hedging Instrument | Other Current Assets | Commodity Derivatives
Derivative Instruments [Line Items]
Derivative assets	0			1
Designated as Hedging Instrument | Other Noncurrent Assets | Equity swap
Derivative Instruments [Line Items]
Derivative assets	0			0
Designated as Hedging Instrument | Other Current Liabilities | Foreign Currency Exchange Derivatives
Derivative Instruments [Line Items]
Derivative liabilities	6			10
Designated as Hedging Instrument | Other Current Liabilities | Commodity Derivatives
Derivative Instruments [Line Items]
Derivative liabilities	1			2
Designated as Hedging Instrument | Liabilities Held for Sale, Current [Member] | Commodity Derivatives
Derivative Instruments [Line Items]
Derivative liabilities	0			12
Designated as Hedging Instrument | Long-term Debt | Foreign Currency Denominated Debt [Member]
Derivative Instruments [Line Items]
Derivative liabilities	2,640			3,149
Not Designated as Hedging Instrument
Derivative Instruments [Line Items]
Derivative assets	65			73
Derivative liabilities	1			2
Not Designated as Hedging Instrument | Other Current Assets | Foreign Currency Exchange Derivatives
Derivative Instruments [Line Items]
Derivative assets	6			10
Not Designated as Hedging Instrument | Other Current Assets | Commodity Derivatives
Derivative Instruments [Line Items]
Derivative assets	0			0
Not Designated as Hedging Instrument | Other Noncurrent Assets | Equity swap
Derivative Instruments [Line Items]
Derivative assets	59			63
Not Designated as Hedging Instrument | Other Current Liabilities | Foreign Currency Exchange Derivatives
Derivative Instruments [Line Items]
Derivative liabilities	1			2
Not Designated as Hedging Instrument | Other Current Liabilities | Commodity Derivatives
Derivative Instruments [Line Items]
Derivative liabilities	0			0
Not Designated as Hedging Instrument | Liabilities Held for Sale, Current [Member] | Commodity Derivatives
Derivative Instruments [Line Items]
Derivative liabilities	0			0
Not Designated as Hedging Instrument | Long-term Debt | Foreign Currency Denominated Debt [Member]
Derivative Instruments [Line Items]
Derivative liabilities	$ 0			$ 0
One billion euro net investment hedge [Member] | Foreign Currency Denominated Debt [Member]
Derivative Instruments [Line Items]
Notional amount | €		€ 888			€ 1,000,000,000,000
423 million euro net investment hedge [Member] | Foreign Currency Denominated Debt [Member]
Derivative Instruments [Line Items]
Notional amount | €		423			423
58 million euro net investment hedge [Member] | Foreign Currency Denominated Debt [Member]
Derivative Instruments [Line Items]
Notional amount | €		€ 54			€ 58

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities - Offsetting Assets and Liabilities (Details) - USD ($)	Jun. 30, 2019	Sep. 30, 2018
Offsetting Derivative Assets and Liabilities [Abstract]
Collateral Already Posted, Aggregate Fair Value	$ 0	$ 0
Derivative assets	69,000,000	80,000,000
Gross amount eligible for offsetting, derivative assets	(6,000,000)	(12,000,000)
Net derivative amount, derivative assets	63,000,000	68,000,000
Derivative liabilities	2,648,000,000	3,175,000,000
Gross amount eligible for offsetting, derivative liabilities	(6,000,000)	(12,000,000)
Net derivative amount, derivative liabilities	$ 2,642,000,000	$ 3,163,000,000

Derivative Instruments and He_5

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		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Gain (Loss) Recognized in Income, Derivative not Recognized as Hedge	$ (16)	$ (34)	$ 11	$ (40)
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	(3)	(4)	(9)	(5)
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	(18)	(32)	(42)	(29)
Foreign Currency Exchange Derivatives | Discontinued Operations
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Gain (Loss) Recognized in Income, Derivative not Recognized as Hedge	(2)	5	52	4
Equity swap | Selling, General And Administrative
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Gain (Loss) Recognized in Income, Derivative not Recognized as Hedge	7	(3)	10	(10)
Net Investment Hedging [Member]
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(36)	165	48	29
Cash Flow Hedging
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(7)	6	5	9
Amount of Gain (Loss) Reclassified from AOCI into Income	1	4	(9)	13
Cash Flow Hedging | Foreign Currency Exchange Derivatives
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(2)	6	7	7
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	2	1	4	0
Cash Flow Hedging | Foreign Currency Exchange Derivatives | Discontinued Operations
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Amount of Gain (Loss) Reclassified from AOCI into Income	0	1	0	2
Cash Flow Hedging | Commodity Derivatives
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(5)	0	(2)	2
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	0	0	(3)	3
Cash Flow Hedging | Commodity Derivatives | Discontinued Operations
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Amount of Gain (Loss) Reclassified from AOCI into Income	$ (1)	$ 2	$ (10)	$ 8

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities - Additional Information (Detail) € in Millions, ¥ in Billions	3 Months Ended		9 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019EUR (€)	Jun. 30, 2019JPY (¥)	Sep. 30, 2018EUR (€)	Sep. 30, 2018JPY (¥)
Derivative [Line Items]
Gains (losses) reclassified from CTA to income for the Company's outstanding net investment hedges | $	$ 0	$ 0	$ 0	$ 0
Foreign Currency Denominated Debt [Member]
Derivative [Line Items]
Notional amount | ¥						¥ 25		¥ 35
58 million euro net investment hedge [Member] | Foreign Currency Denominated Debt [Member]
Derivative [Line Items]
Notional amount					€ 54		€ 58
215 million EUR maturing in March 2020 [Member] | Foreign Currency Denominated Debt [Member]
Derivative [Line Items]
Notional amount							215
One billion euro net investment hedge [Member] | Foreign Currency Denominated Debt [Member]
Derivative [Line Items]
Notional amount					888		1,000,000,000,000
750 million euro net investment hedge [Member] | Foreign Currency Denominated Debt [Member]
Derivative [Line Items]
Notional amount					750		750
423 million euro net investment hedge [Member] | Foreign Currency Denominated Debt [Member]
Derivative [Line Items]
Notional amount					€ 423		€ 423
Net Investment Hedging [Member]
Derivative [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | $	$ (36,000,000)	$ 165,000,000	$ 48,000,000	$ 29,000,000

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Millions		Jun. 30, 2019	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		$ 69	$ 80
Derivative liabilities		2,648	3,175
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets		411	465
Total liabilities		8	26
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets		342	385
Total liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets		69	80
Total liabilities		8	26
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets		0	0
Total liabilities		0	0
Other Current Assets | Fair Value, Measurements, Recurring [Member] | Exchange Traded Funds in Fixed Income securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	[1]	19	14
Other Current Assets | Fair Value, Measurements, Recurring [Member] | Exchange Traded Funds in Fixed Income securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	[1]	19	14
Other Current Assets | Fair Value, Measurements, Recurring [Member] | Exchange Traded Funds in Fixed Income securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	[1]	0	0
Other Current Assets | Fair Value, Measurements, Recurring [Member] | Exchange Traded Funds in Fixed Income securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	[1]	0	0
Other Current Assets | Fair Value, Measurements, Recurring [Member] | Foreign Currency Exchange Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		10	16
Other Current Assets | Fair Value, Measurements, Recurring [Member] | Foreign Currency Exchange Derivatives | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Other Current Assets | Fair Value, Measurements, Recurring [Member] | Foreign Currency Exchange Derivatives | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		10	16
Other Current Assets | Fair Value, Measurements, Recurring [Member] | Foreign Currency Exchange Derivatives | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		0	0
Other Current Assets | Fair Value, Measurements, Recurring [Member] | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets			1
Other Current Assets | Fair Value, Measurements, Recurring [Member] | Commodity Derivatives | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets			0
Other Current Assets | Fair Value, Measurements, Recurring [Member] | Commodity Derivatives | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets			1
Other Current Assets | Fair Value, Measurements, Recurring [Member] | Commodity Derivatives | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets			0
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure		1	1
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure		1	1
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure		0	0
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure		0	0
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Deferred compensation plan assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure		69	100
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Deferred compensation plan assets [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure		69	100
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Deferred compensation plan assets [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure		0	0
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Deferred compensation plan assets [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure		0	0
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Exchange Traded Funds in Fixed Income securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	[1]	138	148
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Exchange Traded Funds in Fixed Income securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	[1]	138	148
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Exchange Traded Funds in Fixed Income securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	[1]	0	0
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Exchange Traded Funds in Fixed Income securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	[1]	0	0
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Exchange traded funds in equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	[1]	115	119
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Exchange traded funds in equity securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	[1]	115	119
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Exchange traded funds in equity securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	[1]	0	0
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Exchange traded funds in equity securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	[1]	0	0
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Equity swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure		59	63
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Equity swap | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure		0	0
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Equity swap | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure		59	63
Other Noncurrent Assets | Fair Value, Measurements, Recurring [Member] | Equity swap | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure		0	0
Assets Held for Sale, Noncurrent [Member] | Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure			3
Assets Held for Sale, Noncurrent [Member] | Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure			3
Assets Held for Sale, Noncurrent [Member] | Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure			0
Assets Held for Sale, Noncurrent [Member] | Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure			0
Other Current Liabilities | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability			2
Other Current Liabilities | Commodity Derivatives | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability			0
Other Current Liabilities | Commodity Derivatives | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability			2
Other Current Liabilities | Commodity Derivatives | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability			0
Other Current Liabilities | Fair Value, Measurements, Recurring [Member] | Foreign Currency Exchange Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		7	12
Other Current Liabilities | Fair Value, Measurements, Recurring [Member] | Foreign Currency Exchange Derivatives | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		0	0
Other Current Liabilities | Fair Value, Measurements, Recurring [Member] | Foreign Currency Exchange Derivatives | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		7	12
Other Current Liabilities | Fair Value, Measurements, Recurring [Member] | Foreign Currency Exchange Derivatives | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		0	0
Other Current Liabilities | Fair Value, Measurements, Recurring [Member] | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		1
Other Current Liabilities | Fair Value, Measurements, Recurring [Member] | Commodity Derivatives | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		0
Other Current Liabilities | Fair Value, Measurements, Recurring [Member] | Commodity Derivatives | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		1
Other Current Liabilities | Fair Value, Measurements, Recurring [Member] | Commodity Derivatives | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		$ 0
Liabilities Held for Sale, Current [Member] | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability			12
Liabilities Held for Sale, Current [Member] | Commodity Derivatives | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability			0
Liabilities Held for Sale, Current [Member] | Commodity Derivatives | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability			12
Liabilities Held for Sale, Current [Member] | Commodity Derivatives | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability			$ 0
[1]	1 Classified as restricted investments for payment of asbestos liabilities. See Note 20, "Commitments and Contingencies," of the notes to consolidated financial statements for further details.

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018
Derivative [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss) Restricted	$ 9	$ 0
Proceeds from Sale and Maturity of Marketable Securities				$ 3
Marketable Securities, Realized Gain (Loss)				$ 2
Fair value of long term debt	7,500		$ 7,500		$ 9,600
Fair Value, Inputs, Level 1 [Member]
Derivative [Line Items]
Fair value of long term debt	7,300		7,300		8,600
Fair Value, Inputs, Level 2 [Member]
Derivative [Line Items]
Fair value of long term debt	200		200		$ 1,000
Marketable Securities [Member]
Derivative [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ 9		8
Deferred compensation plan assets [Member]
Derivative [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)			$ (2)

Impairment of Long-Lived Asse_2

Impairment of Long-Lived Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges			$ 235	$ 28
Global Products
Impairment of Long Lived Assets [Line Items]
Impairment of Long-Lived Assets to be Disposed of	$ 235
2018 Restructuring Plan
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges		$ 28
2018 Restructuring Plan | Global Products
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges		23
2018 Restructuring Plan | Corporate Segment
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges		5
2018 Restructuring Plan | Power Solutions
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges		$ 2

Segment Information - Additiona

Segment Information - Additional Information (Detail)	9 Months Ended
	Jun. 30, 2019Segment
Segment Reporting Information [Line Items]
Number of reportable segments	4

Segment Information - Financial

Segment Information - Financial Information Related to Company's Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Net sales	$ 6,451	$ 6,282		$ 17,694	$ 17,217
Segment EBITA	832	942		2,079	2,213
Corporate expenses	70	(142)		(233)	(442)
Amortization of intangible assets	(93)	(98)		(288)	(282)
Restructuring and impairment costs	(235)	0	$ (154)	(235)	(154)
Equity Securities, FV-NI, Unrealized Gain (Loss) Restricted	9	0
Net mark-to-market adjustments on pension plans				8	0
Net financing charges	(119)	(95)		(302)	(304)
Income from continuing operations before income taxes	464	607		1,029	1,031
Building Solutions North America
Segment Reporting Information [Line Items]
Net sales	2,327			6,630
Building Solutions EMEA/LA
Segment Reporting Information [Line Items]
Net sales	922			2,707
Building Solutions Asia Pacific
Segment Reporting Information [Line Items]
Net sales	691			1,932
Global Products
Segment Reporting Information [Line Items]
Net sales	2,511			6,425
Building Technologies & Solutions | Building Solutions North America
Segment Reporting Information [Line Items]
Net sales	2,327	2,246		6,630	6,355
Segment EBITA	300	314		807	780
Building Technologies & Solutions | Building Solutions EMEA/LA
Segment Reporting Information [Line Items]
Net sales	922	926		2,707	2,748
Segment EBITA	101	96		258	242
Building Technologies & Solutions | Building Solutions Asia Pacific
Segment Reporting Information [Line Items]
Net sales	691	681		1,932	1,864
Segment EBITA	98	97		240	242
Building Technologies & Solutions | Global Products
Segment Reporting Information [Line Items]
Net sales	2,511	2,429		6,425	6,250
Segment EBITA	$ 333	$ 435		$ 774	$ 949

Guarantees - Additional Informa

Guarantees - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2016
Guarantor Obligations [Line Items]
Post sale contingent tax indemnification liabilities			$ 255	$ 290
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
Release of tax indemnification reserve	$ 226
Business Divestitures, Not Specific [Member]
Guarantor Obligations [Line Items]
Post sale contingent tax indemnification liabilities			$ 235

Product Warranties - Changes in

Product Warranties - Changes in Carrying Amount of Product Warranty liability (Detail) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 315	$ 323
Accruals for warranties issued during the period	85	73
Accruals from acquisition and divestitures	2	1
Accruals related to pre-existing warranties	(20)	(21)
Settlements made (in cash or in kind) during the period	(79)	(67)
Currency translation	1	0
Balance at end of period	$ 304	$ 309

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Jun. 30, 2019	Sep. 30, 2018
Loss Contingencies [Line Items]
Estimated asbestos related net liability on a discounted basis	$ 167	$ 173
Reserves for environmental liabilities	163	37
Conditional asset retirement obligations	30	29
Accrued Environmental Loss Contingencies, Current	52	10
Accrued Environmental Loss Contingencies, Noncurrent	111	27
Liability for Asbestos and Environmental Claims, Gross	538	550
Restricted Cash and Investments	371	377
Restricted Cash and Cash Equivalents	16	15
Insurance Recoveries	83	90
Insurable liabilities	451	417
Insurance Settlements Receivable, Current	6	6
Insurance Settlements Receivable	26	26
Insurance Settlements Receivable, Noncurrent	20	20
Asbestos Issue [Member]
Loss Contingencies [Line Items]
Restricted Cash and Cash Equivalents	16	6
Restricted Investments	272	281
Accrued Compensation and Benefits [Member]
Loss Contingencies [Line Items]
Insurable liabilities	22	22
Other Current Assets
Loss Contingencies [Line Items]
Restricted Cash and Investments	49	33
Other Noncurrent Assets
Loss Contingencies [Line Items]
Restricted Cash and Investments	322	344
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Liability for Asbestos and Environmental Claims, Gross	483	495
Insurable liabilities	311	300
Other Current Liabilities
Loss Contingencies [Line Items]
Liability for Asbestos and Environmental Claims, Gross	55	55
Insurable liabilities	118	$ 95
Stanton Street Facility, Marinette, WI [Member]
Loss Contingencies [Line Items]
Environmental Remediation Expense	$ 140

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018
Related Party Transaction [Line Items]
Receivable from related parties	$ 55		$ 55		$ 36
Payable to related parties	8		8		$ 18
Revenue from related parties	65	$ 65	162	$ 169
Purchases from related parties	$ 27	$ 19	$ 57	$ 43