10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_______________________________

FORM 10-Q

_______________________________

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2018

or

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number 001-35971

_______________________________

ALLEGION PUBLIC LIMITED COMPANY

(Exact name of registrant as specified in its charter)

_______________________________

Ireland	98-1108930
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

Block D

Iveagh Court

Harcourt Road

Dublin 2, Ireland

(Address of principal executive offices, including zip code)

+(353) (1) 2546200

(Registrant’s telephone number, including area code)

_______________________________

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    YES  x    NO  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    YES  x   NO  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨	Smaller reporting company	¨
		Emerging growth company	¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).     YES  ¨    NO  x

The number of ordinary shares outstanding of Allegion plc as of October 22, 2018 was 95,055,763.

ALLEGION PLC

FORM 10-Q

INDEX

PART I FINANCIAL INFORMATION		1
Item 1 -	Financial Statements	1
	Condensed and Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2018 and 2017 (Unaudited)	1
	Condensed and Consolidated Balance Sheets at September 30, 2018 and December 31, 2017 (Unaudited)	2
	Condensed and Consolidated Statements of Cash Flows for the nine months ended September 30, 2018 and 2017 (Unaudited)	3
	Notes to Condensed and Consolidated Financial Statements (Unaudited)	4
Item 2 -	Management’s Discussion and Analysis of Financial Condition and Results of Operations	33
Item 3 -	Quantitative and Qualitative Disclosures about Market Risk	47
Item 4 -	Controls and Procedures	47
PART II OTHER INFORMATION		48
Item 1 -	Legal Proceedings	48
Item 1A -	Risk Factors	48
Item 2 -	Unregistered Sales of Equity Securities and Use of Proceeds	48
Item 6 -	Exhibits	49
SIGNATURES		50

PART I-FINANCIAL INFORMATION

Item 1. Financial Statements

ALLEGION PLC

CONDENSED AND CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Three months ended						Nine months ended
	September 30,						September 30,
In millions, except per share amounts	2018			2017			2018			2017
Net revenues	$	711.5		$	609.4		$	2,029.3		$	1,785.1
Cost of goods sold	402.1			335.0			1,156.5			988.2
Selling and administrative expenses	167.1			147.3			488.4			435.3
Operating income	142.3			127.1			384.4			361.6
Interest expense	14.0			17.8			40.3			49.7
Other income, net	(1.9		)	(2.7		)	(3.9		)	(5.6		)
Earnings before income taxes	130.2			112.0			348.0			317.5
Provision for income taxes	14.1			21.9			45.5			52.9
Net earnings	116.1			90.1			302.5			264.6
Less: Net earnings attributable to noncontrolling interests	0.1			0.3			0.4			0.9
Net earnings attributable to Allegion plc	$	116.0		$	89.8		$	302.1		$	263.7
Earnings per share attributable to Allegion plc ordinary shareholders:
Basic net earnings	$	1.22		$	0.95		$	3.18		$	2.77
Diluted net earnings	$	1.21		$	0.94		$	3.15		$	2.75
Weighted-average shares outstanding
Basic	95.1			95.0			95.1			95.2
Diluted	95.8			95.8			95.8			96.0
Dividends declared per ordinary share	$	0.21		$	0.16		$	0.63		$	0.48
Total comprehensive income	$	103.3		$	112.7		$	265.3		$	347.5
Less: Total comprehensive (loss) income attributable to noncontrolling interests	(0.6		)	0.8			(1.6		)	2.0
Total comprehensive income attributable to Allegion plc	$	103.9		$	111.9		$	266.9		$	345.5

See accompanying notes to condensed and consolidated financial statements.

1

ALLEGION PLC

CONDENSED AND CONSOLIDATED BALANCE SHEETS

(Unaudited)

In millions	September 30, 2018			December 31, 2017
ASSETS
Current assets:
Cash and cash equivalents	$	189.7		$	466.2
Restricted cash	6.8			—
Accounts and notes receivable, net	361.4			296.6
Inventories	278.3			239.8
Other current assets	37.1			30.1
Total current assets	873.3			1,032.7
Property, plant and equipment, net	273.3			252.2
Goodwill	878.0			761.2
Intangible assets, net	558.4			394.3
Other noncurrent assets	147.1			101.6
Total assets	$	2,730.1		$	2,542.0
LIABILITIES AND EQUITY
Current liabilities:
Accounts payable	$	208.0		$	188.3
Accrued expenses and other current liabilities	243.9			237.5
Short-term borrowings and current maturities of long-term debt	35.0			35.0
Total current liabilities	486.9			460.8
Long-term debt	1,417.7			1,442.3
Other noncurrent liabilities	226.5			233.4
Total liabilities	2,131.1			2,136.5
Equity:
Allegion plc shareholders’ equity:
Ordinary shares, $0.01 par value (95,051,627 and 95,062,385 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively)	1.0			1.0
Capital in excess of par value	12.2			9.1
Retained earnings	771.9			544.4
Accumulated other comprehensive loss	(188.2		)	(152.9		)
Total Allegion plc shareholders’ equity	596.9			401.6
Noncontrolling interests	2.1			3.9
Total equity	599.0			405.5
Total liabilities and equity	$	2,730.1		$	2,542.0

See accompanying notes to condensed and consolidated financial statements.

2

ALLEGION PLC

CONDENSED AND CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Nine months ended
	September 30,
In millions	2018			2017
Cash flows from operating activities:
Net earnings	$	302.5		$	264.6
Adjustments to arrive at net cash provided by operating activities:
Depreciation and amortization	65.8			49.9
Discretionary pension plan contribution	—			(50.0		)
Changes in assets and liabilities and other non-cash items	(107.9		)	(94.5		)
Net cash provided by operating activities	260.4			170.0
Cash flows from investing activities:
Capital expenditures	(31.8		)	(33.7		)
Acquisition of and equity investments in businesses, net of cash acquired	(375.8		)	(20.8		)
Proceeds from sale of equity investment	—			15.5
Other investing activities, net	(1.1		)	2.9
Net cash used in investing activities	(408.7		)	(36.1		)
Cash flows from financing activities:
Short-term borrowings, net	(0.7		)	(1.3		)
Proceeds from revolving facility	115.0			165.0
Repayments of revolving facility	(115.0		)	—
Issuance of term facility	—			700.0
Settlement of second amended credit facility	—			(856.3		)
Payments of other long-term debt	(26.7		)	(23.5		)
Debt repayments, net	(27.4		)	(16.1		)
Debt issuance costs	—			(3.0		)
Dividends paid to ordinary shareholders	(59.6		)	(45.6		)
Repurchase of ordinary shares	(30.0		)	(60.0		)
Other financing activities, net	0.1			6.0
Net cash used in financing activities	(116.9		)	(118.7		)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(4.5		)	7.3
Net (decrease) increase in cash, cash equivalents, and restricted cash	(269.7		)	22.5
Cash, cash equivalents, and restricted cash - beginning of period	466.2			312.4
Cash, cash equivalents, and restricted cash - end of period	$	196.5		$	334.9

See accompanying notes to condensed and consolidated financial statements.

3

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 1 – Basis of Presentation

The accompanying Condensed and Consolidated Financial Statements of Allegion plc, an Irish public limited company, and its consolidated subsidiaries ("Allegion" or the "Company"), reflect the consolidated operations of the Company and have been prepared in accordance with United States Securities and Exchange Commission ("SEC") interim reporting requirements. Accordingly, the accompanying Condensed and Consolidated Financial Statements do not include all disclosures required by accounting principles generally accepted in the United States of America ("GAAP") for full financial statements and should be read in conjunction with the consolidated financial statements included in the Allegion Annual Report on Form 10-K for the year ended December 31, 2017. In the opinion of management, the accompanying Condensed and Consolidated Financial Statements contain all adjustments, which include normal recurring adjustments, necessary to state fairly the consolidated unaudited results for the interim periods presented.

Note 2 – Recent Accounting Pronouncements

Recently Adopted Accounting Pronouncements:

In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers" (ASC 606). ASC 606 is a single, comprehensive revenue recognition model for all contracts with customers. The model is based on changes in contract assets (rights to receive consideration) and liabilities (obligations to provide a good or perform a service). Revenue is recognized based on the satisfaction of performance obligations, which occurs when control of a good or service transfers to a customer. ASC 606

contains expanded disclosure requirements relating to the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. ASC 606 allows entities to adopt the standard on either a full retrospective approach or report the cumulative effect as of the date of adoption ("modified retrospective method"). The FASB has also issued the following standards which clarify ASU 2014-09: ASU 2017-14, Revenue Recognition, Revenue from Contracts with Customers: Amendments to SEC Paragraphs Pursuant to Staff Accounting Bulletin No. 116 and SEC Release No. 33-10403, ASU 2017-13, Revenue Recognition, Revenue from Contracts with Customers: Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Rescission of Prior SEC Staff Announcements and Observer Comments, ASU 2016-20, Revenue from Contracts with Customers: Technical Corrections and Improvements, ASU 2016-12, Revenue from Contracts with Customers: Narrow-Scope Improvements and Practical Expedients and ASU 2016-10, Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing. The Company adopted each of these standards on January 1, 2018 on a modified retrospective basis. The impact of adopting the new standards was not material to the Company’s Condensed and Consolidated Financial Statements at January 1, 2018 or for the three or nine months ended September 30, 2018, and no cumulative effect adjustment was recorded to opening retained earnings. Expanded disclosure as required by the new standards is presented within Note 17 to the Condensed and Consolidated Financial Statements.

In August 2016, the FASB issued ASU 2016-15, "Statement of Cash Flows (Topic 230): Clarification of Certain Cash Receipts and Cash Payments." ASU 2016-15 eliminates the diversity in practice related to the classification of certain cash receipts and payments in the statement of cash flows, by adding or clarifying guidance on eight specific cash flow issues. The ASU is effective for annual and interim reporting periods beginning after December 15, 2017, and as such, the Company adopted ASU 2016-15 on January 1, 2018. The amendments in this update are required to be applied retrospectively to all periods presented. The adoption of ASU 2016-15 did not have a material impact on the Condensed and Consolidated Financial Statements.

In January 2017, the FASB issued ASU 2017-01, "Business Combinations (Topic 805): Clarifying the Definition of a Business." This update provides guidance to assist companies in evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The update provides a more robust framework to use in determining when a set of transferred assets and activities is a business. This ASU is effective for annual and interim reporting periods beginning after December 15, 2017, and requires prospective adoption. The Company adopted ASU 2017-01 on January 1, 2018. The adoption of ASU 2017-01 did not have a material impact on the Condensed and Consolidated Financial Statements.

In March 2017, the FASB issued ASU 2017-07, "Compensation—Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost." ASU 2017-07 requires that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the statement of comprehensive income separately from the service cost component and outside a subtotal of operating income. ASU 2017-07 also allows only the service cost component to be eligible for capitalization when applicable (for example, as a cost of internally manufactured

4

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

inventory or a self-constructed asset). The ASU is effective for annual periods beginning after December 15, 2017, and as such, the Company adopted ASU 2017-07 on January 1, 2018. The Company has applied ASU 2017-07 retrospectively for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the Condensed and Consolidated Statements of Comprehensive Income and prospectively for the capitalization of the service cost component of net periodic pension cost and net periodic postretirement benefit in assets. The adoption of ASU 2017-07 did not have a material impact on the Condensed and Consolidated Financial Statements.

In August 2017, the FASB issued ASU 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities." ASU 2017-12 addresses previous limitations on how an entity can designate the hedged risk in certain cash flow and fair value hedging relationships by expanding and refining hedge accounting for both nonfinancial and financial risk components and aligning the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. The ASU is effective for annual periods beginning after December 15, 2018, with early adoption permitted. The Company elected to early adopt the provisions of ASU 2017-12 on January 1, 2018. The amendments in this update have been applied to hedging relationships existing on the date of adoption. The adoption of ASU 2017-12 did not have a material impact on the Condensed and Consolidated Financial Statements.

In March 2018, the FASB issued ASU 2018-05, "Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118". The overarching purpose of ASU 2018-05 is to codify the guidance issued by the SEC related to income tax accounting implications due to the comprehensive U.S. tax legislation commonly referred to as the Tax Cuts and Jobs Act enacted on December 22, 2017 (the "Tax Reform Act"), as originally discussed within Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (SAB 118) within ASC 740, Income Taxes. SAB 118, and now ASC 740 provide a measurement period, which in no case should extend beyond one year from the Tax Reform Act enactment date, during which a company acting in good faith may complete the accounting for the impacts of the Tax Reform Act. To the extent that a company’s accounting for certain income tax effects of the Tax Reform Act is incomplete, the company can determine a reasonable estimate for those effects and record a provisional estimate in the financial statements in the first reporting period in which a reasonable estimate can be determined. If a company cannot determine a provisional estimate to be included in the financial statements, the company should continue to apply ASC 740 based on the provisions of the tax laws that were in effect immediately prior to the Tax Reform Act being enacted. At December 31, 2017, the Company recorded a provisional valuation allowance related to interest limitation carryforwards and other adjustments to the net deferred tax assets, with a corresponding discrete net tax charge of $22.8 million. On April 2, 2018, IRS Notice 2018-28 was issued to provide guidance to assist taxpayers in complying with providing transition guidance related to interest limitation carryforwards recorded at the enactment date. Management is in process of evaluating IRS Notice 2018-28 and assessing its impact on the provisional valuation allowance recorded at December 31, 2017. During the three-month period ended September 30, 2018, an adjustment resulting in a $3.3 million tax benefit was made to the provisional amounts previously recognized related to the Tax Reform Act, primarily relating to clarified guidance received during the quarter around the deductibility of certain executive compensation. The Company will continue to analyze impacts from the enactment of the Tax Reform Act on its Condensed and Consolidated Financial Statements, and any additional impacts will be recorded as they are identified during the measurement period as provided for in SAB 118, which extends up to one year from the enactment date.

Recently Issued Accounting Pronouncements

In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)." ASU 2016-02 requires the identification of arrangements that should be accounted for as leases by lessees. In general, for lease arrangements exceeding a twelve month term, these arrangements will be recognized as assets and liabilities on the balance sheet of the lessee. Under ASU 2016-02, a right-of-use asset and lease obligation will be recorded for all leases, whether operating or financing, while the income statement will reflect lease expense for operating leases and amortization/interest expense for financing leases. In July 2018, the FASB issued ASU 2018-10, "Codification Improvements to Topic 842 (Leases)", which provides narrow amendments to clarify how to apply certain aspects of ASU 2016-02, and ASU 2018-11, "Leases (Topic 842): Targeted Improvements", which provides adopters an additional transition method by allowing entities to initially apply ASU 2016-02, and subsequent related standards, at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. These ASUs are effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods. Early adoption is permitted. The Company is in the process of updating its systems, policies, and internal controls over financial reporting in anticipation of adopting these standards on January 1, 2019. The Company will utilize the new cumulative-effect adjustment transition method allowed per ASU 2018-11. The Company also currently anticipates electing the following practical expedients available within these standards:

5

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

• The Company will elect to not separate non-lease components from lease components and instead to account for each separate lease component and the non-lease components associated with that lease component as a single lease component.

• If at the lease commencement date a lease has a lease term of 12 months or less and does not include a purchase option that is reasonably certain to exercise, the Company will elect not to apply ASC 842 recognition requirements. Nonetheless, the Company intends to include leases of less than 12 months within the updated footnote disclosures.

• If the Company enters into a large number of leases in the same month with the same terms and conditions, these will be looked at as a group (portfolio) assuming the lease model under this approach will not materially differ from applying to each individual lease.

• If available, the rate implicit in the lease will be used as the discount rate. However, if this is not available, the Company will use it's incremental borrowing rate as the discount rate, defined as the weighted average rate of total outstanding debt, gross of any hedging contracts.

• As the Company will apply the new transition method allowed per ASU 2018-11, the Company will elect to not reassess arrangements entered into prior than January 1, 2019 for whether an arrangement is or contains a lease, the lease classification applied, or to separate initial direct costs.

The Company is continuing to assess what the complete impact these ASUs and the related practical expedients will have on the Condensed and Consolidated Financial Statements; however, the Company anticipates that adoption will result in the recognition of a significant right-of-use asset and lease liability on its Condensed and Consolidated Balance Sheets. Changes to processes and internal controls to meet the new standards' reporting and disclosure requirements have been identified and are being implemented. Software has been implemented that will assist in the recognition of the right-to-use asset and lease liability to be included on the Condensed and Consolidated Balance Sheets related to leases currently classified as operating leases with durations greater than twelve months, with certain allowable exceptions. The Company is in the process of reviewing its lease portfolio, as well as other agreements not currently classified as leases, for embedded leases and to ensure appropriate classification and disclosure under the new standards.

In June 2016, the FASB issued ASU 2016-13, "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." The new guidance introduces an approach based on expected losses to estimate credit losses on certain types of financial instruments. The ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. The Company is assessing what impact ASU 2016-13 will have on the Condensed and Consolidated Financial Statements.

In February 2018, the FASB issued ASU 2018-02, "Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." The new guidance permits entities to reclassify tax effects stranded in accumulated other comprehensive income (AOCI) as a result of the Tax Reform Act. ASU 2018-02 provides this option not only for the impact to deferred tax assets and liabilities due to the reduction in the U.S. tax rate, but also for tax effects stranded in AOCI for other reasons specific to the Tax Reform Act, such as state taxes or transitioning to a territorial tax system. Tax effects that are stranded in AOCI for reasons not relating to the Tax Reform Act may not be reclassified under ASU 2018-02. This ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. Entities that adopt the ASU in an annual or interim period after the period of enactment are able to choose whether to apply the amendments retrospectively to each period in which the effect of the Tax Reform Act is recognized or to apply the amendments in the period of adoption. The Company is assessing what impact ASU 2018-02 will have on the Condensed and Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-13, "Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement." The new guidance modifies the disclosure requirements related to fair value measurements in Topic 820, Fair Value Measurement, including removing certain previous disclosure requirements, adding certain new disclosure requirements, and modifying certain other disclosure requirements. The ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. The Company elected to early adopt ASU 2018-13 on October 1, 2018. The adoption is not expected to have a material impact on the Condensed and Consolidated Financial Statements.

6

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

In August 2018, the FASB issued ASU 2018-14, "Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans." The new guidance modifies the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans, including removing certain previous disclosure requirements, adding certain new disclosure requirements, and clarifying certain other disclosure requirements. The ASU will be effective for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. Early adoption is permitted. The Company elected to early adopt ASU 2018-14 on October 1, 2018. The adoption is not expected to have a material impact on the Condensed and Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-15, "Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract." The new guidance aligns the requirements for capitalizing implementation costs incurred in a cloud-based hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. The Company is assessing what impact ASU 2018-15 will have on the Condensed and Consolidated Financial Statements.

Note 3 – Inventories

Inventories are stated at the lower of cost and net realizable value using the first-in first-out (FIFO) method.

The major classes of inventory were as follows:

In millions	September 30, 2018		December 31, 2017
Raw materials	$	60.5	$	66.6
Work-in-process	25.7		29.8
Finished goods	192.1		143.4
Total	$	278.3	$	239.8

Note 4 – Goodwill

The changes in the carrying amount of goodwill for the nine months ended September 30, 2018 were as follows:

In millions	Americas		EMEIA			Asia Pacific			Total
December 31, 2017 (gross)	$	375.2	$	769.8		$	101.7		$	1,246.7
Accumulated impairment	—		(478.6		)	(6.9		)	(485.5		)
December 31, 2017 (net)	375.2		291.2			94.8			761.2
Acquisitions	107.5		9.2			15.8			132.5
Currency translation	0.2		(9.6		)	(6.3		)	(15.7		)
September 30, 2018 (net)	$	482.9	$	290.8		$	104.3		$	878.0

7

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

Note 5 – Intangible Assets

The gross amount of the Company’s intangible assets and related accumulated amortization were as follows:

	September 30, 2018							December 31, 2017
In millions	Gross carrying amount		Accumulated amortization			Net carrying amount		Gross carrying amount		Accumulated amortization			Net carrying amount
Completed technologies/patents	$	59.0	$	(13.1	)	$	45.9	$	32.6	$	(10.0	)	$	22.6
Customer relationships	423.6		(84.5		)	339.1		324.5		(74.1		)	250.4
Trade names (finite-lived)	87.9		(47.1		)	40.8		89.0		(46.1		)	42.9
Other	9.1		(6.1		)	3.0		7.9		(4.9		)	3.0
Total finite-lived intangible assets	579.6		$	(150.8	)	428.8		454.0		$	(135.1	)	318.9
Trade names (indefinite-lived)	129.6					129.6		75.4					75.4
Total	$	709.2				$	558.4	$	529.4				$	394.3

Intangible asset amortization expense was $28.6 million and $16.4 million for the nine months ended September 30, 2018 and 2017, respectively. Future estimated amortization expense on existing intangible assets in each of the next five years amounts to approximately $34.4 million for full year 2018, $28.7 million for 2019, $28.7 million for 2020, $28.7 million for 2021, and $28.7 million for 2022.

Note 6 – Acquisitions and Investments in Unconsolidated Entities

2018

During the nine months ended September 30, 2018, the Company completed six acquisitions:

Business	Date
Technical Glass Products, Inc. ("TGP")	January 2018
Hammond Enterprises, Inc. ("Hammond")	January 2018
Qatar Metal Industries LLC ("QMI")	February 2018
AD Systems, Inc. ("AD Systems")	March 2018
Gainsborough Hardware and API Locksmiths ("Door and Access Systems")	July 2018
ISONAS Security Systems, Inc. ("ISONAS")	July 2018

In January 2018, the Company acquired 100% of TGP through one of its subsidiaries. TGP provides fire-rated architectural glass and framing solutions for commercial buildings, as well as non-fire rated architectural glass and framing, including channel glass systems and curtain walls throughout the United States, Canada, and select markets in the Middle East. TGP has been integrated into the Company's Americas and EMEIA segments.

In January 2018, the Company acquired 100% of the machinery, equipment, and intellectual property of a division of Hammond through one of its subsidiaries. The assets acquired have been integrated into the Company's existing production facilities and are specific to the Company's Schlage-branded products.

In February 2018, the Company acquired 100% of QMI through one of its subsidiaries. QMI specializes in fire rated and non-fire rated steel and wooden doors, acoustic doors, and wooden cabinets, as well as fire rated curtain wall systems and access panels in Qatar, Saudi Arabia, Bahrain, Oman, Kuwait, the United Arab Emirates, and Africa. QMI has been integrated into the Company's EMEIA segment.

In March 2018, the Company acquired 100% of AD Systems through one of its subsidiaries. AD Systems designs and manufactures high-performance interior and storefront door systems, specializing in sliding and acoustic solutions. AD Systems' portfolio includes sliding and swinging doors, perimeter frames, door hardware, gasketing, seals and sidelite panels. AD Systems has been integrated into the Company's Americas segment.

8

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

In July 2018, the Company acquired Door and Access Systems, based in Australia, through one of its subsidiaries. This business includes the brands Gainsborough Hardware, the market-leading residential door hardware brand in Australia, and API Locksmiths, which serves the Australian market with its keying, installation and access control services. Door and Access Systems has been integrated into the Company's Asia Pacific segment.

In July 2018, the Company acquired 100% of ISONAS through one of its subsidiaries. ISONAS designs and manufactures edge-computing technology that produces Power over Ethernet access control solutions for non-residential end-markets. ISONAS has been integrated into the Company's Americas segment.

Total consideration paid for these six acquisitions to date was approximately $368 million (net of cash acquired). The Company estimates the fair value of future consideration to be paid, including contingent consideration, to be approximately $6 million. Cash on hand and $75 million of borrowings on the Revolving Facility in July, which has since been repaid, were utilized to fund these acquisitions. The preliminary allocation of the aggregate purchase price to assets acquired and liabilities assumed for the acquisitions described above is as follows:

In millions
Accounts receivable, net	$	29.8
Inventories	28.7
Other current assets	1.3
Property, plant and equipment, net	27.6
Goodwill	132.5
Intangible assets, net	204.3
Other noncurrent assets	0.9
Accounts payable	(11.1		)
Accrued expenses and other current liabilities	(35.2		)
Other noncurrent liabilities	(4.7		)
Total consideration	$	374.1

Intangible assets are primarily comprised of approximately $59 million of indefinite-lived trade names, $112 million of customer relationships, and $33 million of completed technologies and other intangibles, which includes approximately $6 million of acquired backlog revenue. The customer relationships have a 17-year weighted average useful life, while the completed technologies and other intangibles, excluding the backlog revenue, have a 16-year weighted average useful life. The backlog revenue was fully amortized as of June 30, 2018.

Goodwill results from several factors including Allegion-specific synergies that were excluded from the cash flow projections used in the valuation of intangible assets and intangible assets that do not qualify for separate recognition, for example, assembled workforce. The majority of the goodwill is expected to be deductible for tax purposes. The preliminary purchase price allocations for the acquisitions are pending completion of valuations. These acquisitions are accounted for as business combinations.

The following unaudited pro forma financial information for the three and nine months ended September 30, 2018 and 2017 reflects the consolidated results of operations of the Company as if these acquisitions had taken place on January 1, 2017:

	Three months ended				Nine months ended
In millions, except per share amounts	2018		2017		2018		2017
Net revenues	$	711.5	$	663.6	$	2,071.8	$	1,939.3
Net earnings attributable to Allegion plc	$	119.3	$	93.4	$	313.1	$	263.2
Basic net earnings per share	$	1.25	$	0.98	$	3.29	$	2.76
Diluted net earnings per share	$	1.25	$	0.97	$	3.27	$	2.74

9

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

The unaudited pro forma financial information is presented for informational purposes only and does not purport to be indicative of results of operations that would have occurred had the pro forma events taken place on the date indicated or the future consolidated results of operations of the combined company. The unaudited pro forma financial information has been calculated after applying the Company's accounting policies and adjusting the historical financial results to reflect additional items directly attributable to the acquisitions that would have been incurred assuming the acquisitions had occurred on January 1, 2017. Adjustments to historical financial information include additional amortization of approximately $1.5 million (net of tax) and $8.3 million (net of tax) included in the three and nine months ended September 30, 2017, respectively, in the pro forma table above. Approximately $3.9 million (net of tax) of the additional amortization included in the nine months ended September 30, 2017 relates to backlog revenue acquired by the Company, which is recorded in Cost of goods sold.

The following financial information reflects Net revenues and Earnings before income taxes of the acquisitions for the three and nine months ended September 30, 2018 since their respective acquisition dates included in the Condensed and Consolidated Statement of Comprehensive Income:

In millions	Three months ended September 30, 2018		Nine months ended September 30, 2018
Net revenues	$	55.0	$	115.0
Earnings before income taxes	$	0.9	$	(0.7	)

During the three months ended September 30, 2018 and 2017, the Company incurred $4.1 million and $1.2 million, respectively, of acquisition and integration related exenses. During the nine months ended September 30, 2018 and 2017, the Company incurred $8.6 million and $2.4 million, respectively, of acquisition and integration related expenses. These expenses are included in Selling and administrative expenses in the Condensed and Consolidated Statements of Comprehensive Income.

During the nine months ended September 30, 2018, the Company also made $8 million of investments in three unconsolidated entities, Yonomi Inc., a U.S. based mobile application and cloud platform provider for connected living, Nuki GmbH, a European retrofit residential smart lock innovator, and Conneqtech, a European based IoT platform developer specializing in connected mobility and tracking features for bicycles and healthcare. These investments are accounted for using the equity method.

2017

In January 2017, the Company acquired Republic Doors & Frames, LLC ("Republic") through one of its subsidiaries. This acquisitiondid not have a material impact on the Condensed and Consolidated Financial Statements.

In April 2017, iDevices LLC, including the Company's equity investment, was acquired by a third party. The Company recorded a cumulative gain of $5.3 million during the nine months ended September 30, 2017 within Other income, net (see Note 14).

Note 7 – Debt and Credit Facilities

Long-term debt and other borrowings consisted of the following:

In millions	September 30, 2018			December 31, 2017
Term Facility	$	665.0		$	691.3
Revolving Facility	—			—
3.200% Senior Notes due 2024	400.0			400.0
3.550% Senior Notes due 2027	400.0			400.0
Other debt	1.0			1.0
Total borrowings outstanding	1,466.0			1,492.3
Less discounts and debt issuance costs, net	(13.3		)	(15.0		)
Total debt	1,452.7			1,477.3
Less current portion of long-term debt	35.0			35.0
Total long-term debt	$	1,417.7		$	1,442.3

10

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

Unsecured Credit Facilities

As of September 30, 2018, the Company has an unsecured Credit Agreement in place that provides for up to $1,200.0 million in unsecured financing, consisting of a $700.0 million term loan facility (the “Term Facility”) and a $500.0 million revolving credit facility (the “Revolving Facility” and, together with the Term Facility, the “Credit Facilities”). The Credit Facilities mature on September 12, 2022 and are unconditionally guaranteed jointly and severally on an unsecured basis by the Company and Allegion US Holding Company Inc. ("Allegion US Hold Co"), the Company's wholly-owned subsidiary.

The Term Facility amortizes in quarterly installments at the following rates: 1.25% per quarter starting December 31, 2017 through December 31, 2020, 2.5% per quarter from March, 31, 2021 through June 30, 2022, with the balance due on September 12, 2022. The Company repaid $26.3 million of principal on its Term Facility during the nine months ended September 30, 2018.

The Revolving Facility provides aggregate commitments of up to $500.0 million, which includes up to $100.0 million for the issuance of letters of credit. At September 30, 2018, the Company had $0.0 million outstanding on the Revolving Facility and$17.2 million of letters of credit outstanding.

Outstanding borrowings under the Credit Facilities accrue interest, at the option of the Company of (i) a LIBOR rate plus the applicable margin or (ii) a base rate plus the applicable margin. The applicable margin ranges from 1.125% to 1.500% depending on the Company's credit ratings. At September 30, 2018, the outstanding borrowings under the Credit Facilities accrue interest at LIBOR plus a margin of 1.250%. To manage the Company's exposure to fluctuations in LIBOR rates, the Company has interest rate swaps to fix the interest rate for $250.0 million of the outstanding borrowings (see Note 8).

The Credit Facilities contain negative and affirmative covenants and events of default that, among other things, limit or restrict the Company's ability to enter into certain transactions. In addition, the Credit Facilities require the Company to comply with a maximum leverage ratio and a minimum interest expense coverage ratio, as defined within the agreement. As of September 30, 2018, the Company was in compliance with all covenants.

Senior Notes

As of September 30, 2018, Allegion US Hold Co has $400.0 million outstanding of its 3.200% Senior Notes due 2024 (the “3.200% Senior Notes”) and $400.0 million outstanding of its 3.550% Senior Notes due 2027 (the “3.550% Senior Notes” and, together with the 3.200% Senior Notes, the “Notes”). The Notes require semi-annual interest payments on April 1 and October 1 of each year, and will mature on October 1, 2024 and October 1, 2027, respectively.

The Notes are senior unsecured obligations of Allegion US Hold Co and rank equally with all of Allegion US Hold Co’s existing and future senior unsecured and unsubordinated indebtedness. The guarantee of the Notes is the senior unsecured obligation of the Company and ranks equally with all of the Company's existing and future senior unsecured and unsubordinated indebtedness.

The weighted average interest rate for borrowings was 3.24% under the Credit Facilities (including the effect of interest rate swaps), 3.200% under the 3.200% Senior Notes and 3.550% under the 3.550% Senior Notes at September 30, 2018.

Note 8 – Financial Instruments

In the normal course of business, the Company uses various financial instruments, including derivative instruments, to manage the risks associated with interest and currency rate exposures. These financial instruments are not used for trading or speculative purposes.

When a derivative contract is entered into, the Company designates the derivative instrument as a cash flow hedge of a forecasted transaction, a cash flow hedge of a recognized asset or liability, or as an undesignated derivative. The Company formally documents its hedge relationships, including identification of the derivative instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transaction. This process includes linking derivative instruments that are designated as hedges to specific assets, liabilities or forecasted transactions.

11

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

The fair market value of derivative instruments is determined through market-based valuations and may not be representative of the actual gains or losses that will be recorded when these instruments mature due to future fluctuations in the markets in which they are traded.

The Company assesses at inception and at least quarterly thereafter, whether the derivatives used in cash flow hedging transactions are effective in offsetting the changes in the cash flows of the hedged item. To the extent the derivative is deemed to be an effective hedge, the fair market value changes of the instrument are recorded to Accumulated other comprehensive income (AOCI), while changes in the fair market value of derivatives not deemed to be an effective hedge are recorded in Net earnings in the period of change. If the hedging relationship ceases to be effective subsequent to inception, or it becomes probable that a forecasted transaction is no longer expected to occur, the hedging relationship will be undesignated and any future gains and losses on the derivative instrument will be recorded in Net earnings.

Currency Hedging Instruments

The gross notional amount of the Company’s currency derivatives was $74.2 million and $57.7 million at September 30, 2018 and December 31, 2017, respectively. At September 30, 2018 and December 31, 2017, gains of $0.3 million and $0.3 million, net of tax, were included in Accumulated other comprehensive loss related to the Company’s currency derivatives designated as cash flow hedges. The amount expected to be reclassified into Net earnings over the next twelve months is a gain of $0.3 million. The actual amounts that will be reclassified to Net earnings may vary from this amount as a result of changes in market conditions. Gains and losses associated with the Company’s currency derivatives not designated as hedges are recorded in Net earnings as changes in fair value occur. At September 30, 2018, the maximum term of the Company’s currency derivatives was less than one year.

Interest Rate Swaps

The Company has interest rate swaps to fix the interest rate paid during the contract period for $250.0 million of the Company's variable rate Term Facility. These interest rate swaps expire in September 2020 and met the criteria to be accounted for as cash flow hedges of variable rate interest payments. Consequently, the changes in fair value of the interest rate swaps are recognized in Accumulated other comprehensive loss. At September 30, 2018 and December 31, 2017, gains of $5.4 million and $3.5 million, net of tax, were included in Accumulated other comprehensive loss related to these interest rate swaps. The amount expected to be reclassified into Net earnings over the next twelve months is a gain of approximately $2 million. The actual amounts that will be reclassified to Net earnings may vary from this amount as a result of changes in market conditions.

The fair values of derivative instruments included within the Condensed and Consolidated Balance Sheets were as follows:

	Asset derivatives				Liability derivatives
In millions	September 30, 2018		December 31, 2017		September 30, 2018		December 31, 2017
Derivatives designated as hedges:
Currency derivatives	$	0.2	$	0.2	$	0.4	$	0.3
Interest rate swaps	7.9		5.3		—		—
Derivatives not designated as hedges:
Currency derivatives	—		—		0.1		0.4
Total derivatives	$	8.1	$	5.5	$	0.5	$	0.7

Asset and liability currency derivatives included in the table above are recorded within Other current assets and Accrued expenses and other current liabilities, respectively. Interest rate swap derivatives included in the table above are recorded within Other noncurrent assets.

The amounts associated with derivatives designated as hedges affecting Net earnings and Accumulated other comprehensive loss for the three months ended September 30 were as follows:

12

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

	Amount of gain (loss) recognized in Accumulated other comprehensive loss				Location of gain (loss) recognized in Net earnings	Amount of gain reclassified from Accumulated other comprehensive loss and recognized into Net earnings
In millions	2018		2017			2018		2017
Currency derivatives	$	—	$	0.6	Cost of goods sold	$	1.3	$	1.0
Interest rate swaps	1.5		0.3		Interest expense	0.6		—
Total	$	1.5	$	0.9		$	1.9	$	1.0

The amounts associated with derivatives designated as hedges affecting Net earnings and Accumulated other comprehensive loss for the nine months ended September 30 were as follows:

	Amount of gain (loss) recognized in Accumulated other comprehensive loss					Location of gain (loss) recognized in Net earnings	Amount of gain reclassified from Accumulated other comprehensive loss and recognized into Net earnings
In millions	2018		2017				2018		2017
Currency derivatives	$	2.2	$	2.2		Cost of goods sold	$	2.3	$	4.0
Interest rate swaps	4.1		(0.5		)	Interest expense	1.5		—
Total	$	6.3	$	1.7			$	3.8	$	4.0

The gains and losses associated with the Company's non-designated currency derivatives, which are offset by changes in the fair value of the underlying transactions, are included within Other income, net in the Condensed and Consolidated Statements of Comprehensive Income.

Concentration of Credit Risk

The counterparties to the Company’s forward contracts and swaps consist of a number of investment grade major international financial institutions. The Company could be exposed to losses in the event of nonperformance by the counterparties. However, the credit ratings and the concentration of risk in these financial institutions are monitored on a continuous basis and present no significant credit risk to the Company.

Note 9 – Pensions and Postretirement Benefits Other than Pensions

The Company sponsors several U.S. defined benefit and defined contribution plans covering substantially all of its U.S. employees. Additionally, the Company has non-U.S. defined benefit and defined contribution plans covering eligible non-U.S. employees. Postretirement benefits, other than pensions, provide healthcare benefits, and in some instances, life insurance benefits, for certain eligible employees.

Pension Plans

The noncontributory defined benefit pension plans covering non-collectively bargained U.S. employees provide benefits on an average pay formula while most plans for collectively bargained U.S. employees provide benefits on a flat dollar benefit formula. The non-U.S. pension plans generally provide benefits based on earnings and years of service. The Company also maintains additional other supplemental plans for officers and other key employees.

The components of the Company’s Net periodic pension benefit cost (income) for the three and nine months ended September 30 were as follows:

13

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

	U.S.
	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Service cost	$	1.7		$	1.7		$	5.2		$	5.3
Interest cost	2.6			2.7			7.7			7.8
Expected return on plan assets	(3.6		)	(3.0		)	(10.9		)	(8.9		)
Administrative costs and other	0.5			0.4			1.4			1.2
Net amortization of:
Prior service costs	—			—			0.2			0.2
Plan net actuarial losses	1.1			1.3			3.0			3.6
Net periodic pension benefit cost	$	2.3		$	3.1		$	6.6		$	9.2

	Non-U.S.
	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Service cost	$	0.4		$	0.3		$	1.4		$	1.1
Interest cost	2.2			2.1			6.4			6.4
Expected return on plan assets	(3.9		)	(3.4		)	(11.7		)	(10.3		)
Administrative costs and other	0.4			0.5			1.2			1.3
Amortization of plan net actuarial losses	0.3			0.4			0.7			1.3
Net periodic pension benefit income	$	(0.6	)	$	(0.1	)	$	(2.0	)	$	(0.2	)

The Service cost component of Net periodic pension benefit cost (income) is recorded in Cost of goods sold and Selling and administrative expenses within the Condensed and Consolidated Statements of Comprehensive Income. The remaining components of Net periodic pension benefit cost (income), including Administrative costs and other, are recorded within Other income, net within the Condensed and Consolidated Statements of Comprehensive Income.

The Company made employer contributions of $6.6 million and $56.0 million (of which $50.0 million was discretionary) during the nine months ended September 30, 2018 and 2017, respectively, to its defined benefit pension plans. Additional contributions of approximately $4 million are expected during the remainder of 2018.

Postretirement Benefits Other Than Pensions

The Company sponsors a postretirement plan that provides for healthcare benefits, and in some instances, life insurance benefits, that cover certain eligible retired employees. The Company funds postretirement benefit obligations principally on a pay-as-you- go basis. Generally, postretirement health benefits are contributory with contributions adjusted annually. Life insurance plans for retirees are primarily noncontributory. Net periodic postretiremenet benefit cost (income) is included within Other income, net within the Condensed and Consolidated Statements of Comprehensive Income.

Note 10 – Fair Value Measurement

Fair value is defined as the exchange price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Fair value measurements are based on a framework that utilizes the inputs market participants use to determine the fair value of an asset or liability and establishes a fair value hierarchy to prioritize those inputs. The fair value hierarchy is comprised of three levels that are described below:

• Level 1 – Inputs based on quoted prices in active markets for identical assets or liabilities.

• Level 2 – Inputs other than Level 1 quoted prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability.

14

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

• Level 3 – Unobservable inputs based on little or no market activity and that are significant to the fair value of the assets and liabilities.

The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Observable inputs are obtained from independent sources and can be validated by a third party, whereas unobservable inputs reflect assumptions regarding what a third party would use in pricing an asset or liability based on the best information available under the circumstances. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement.

Assets and liabilities measured at fair value at September 30, 2018 were as follows:

	Fair value measurements						Total fair value
In millions	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Recurring fair value measurements
Assets:
Interest rate swaps	$	—	$	7.9	$	—	$	7.9
Foreign currency contracts	—		0.2		—		0.2
Total asset recurring fair value measurements	—		8.1		—		8.1
Liabilities:
Foreign currency contracts	—		0.5		—		0.5
Deferred compensation and other retirement plans	—		21.3		—		21.3
Total liability recurring fair value measurements	—		21.8		—		21.8
Financial instruments not carried at fair value
Total debt	—		1,403.1		—		1,403.1
Total financial instruments not carried at fair value	$	—	$	1,403.1	$	—	$	1,403.1

Assets and liabilities measured at fair value at December 31, 2017 were as follows:

	Fair value measurements						Total fair value
In millions	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Recurring fair value measurements
Assets:
Interest rate swaps	$	—	$	5.3	$	—	$	5.3
Foreign currency contracts	—		0.2		—		0.2
Total asset recurring fair value measurements	—		5.5		—		5.5
Liabilities:
Foreign currency contracts	—		0.7		—		0.7
Deferred compensation and other retirement plans	—		20.9		—		20.9
Total liability recurring fair value measurements	—		21.6		—		21.6
Financial instruments not carried at fair value
Total debt	—		1,485.2		—		1,485.2
Total financial instruments not carried at fair value	$	—	$	1,485.2	$	—	$	1,485.2

15

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

The Company determines the fair value of its financial assets and liabilities using the following methodologies:

• Interest rate swaps – These instruments include interest rate swap contracts for $250.0 million of the Company's variable rate debt. The fair value of the derivative instruments is determined based on quoted prices for the Company's swaps, which is not considered an active market.

• Foreign currency contracts – These instruments include foreign currency contracts for non-functional currency balance sheet exposures. The fair value of the foreign currency contracts is determined based on a pricing model that uses spot rates and forward prices from actively quoted currency markets that are readily accessible and observable.

• Deferred compensation and other retirement plans - These include obligations related to deferred compensation and other retirement plans adjusted for market performance. The fair value is obtained based on observable market prices quoted on public exchanges for similar instruments.

• Debt – These instruments are recorded at cost and include senior notes maturing through 2027. The fair value of the long-term debt instruments is obtained based on observable market prices quoted on public exchanges for similar instruments.

The carrying values of Cash and cash equivalents, Restricted cash, Accounts receivable, Accounts payable and Accrued expenses and Other current liabilities are a reasonable estimate of their fair value due to the short-term nature of these instruments.

These methodologies used by the Company to determine the fair value of its financial assets and liabilities at September 30, 2018 are the same as those used at December 31, 2017. There have been no significant transfers between Level 1 and Level 2 categories.

Note 11 – Equity

The reconciliation of Ordinary shares is as follows:

In millions	Total
December 31, 2017	95.1
Shares issued under incentive plans, net	0.4
Repurchase of ordinary shares	(0.4	)
September 30, 2018	95.1

During the nine months ended September 30, 2018, the Company paid $30.0 million to repurchase 0.4 million ordinary shares on the open market under a share repurchase authorization previously approved by its Board of Directors.

The components of Equity for the nine months ended September 30, 2018 were as follows:

In millions	Allegion plc shareholders’ equity			Noncontrolling interests			Total equity
Balance at December 31, 2017	$	401.6		$	3.9		$	405.5
Net earnings	302.1			0.4			302.5
Currency translation	(42.2		)	(2.0		)	(44.2		)
Change in value of derivatives qualifying as cash flow hedges, net of tax	1.9			—			1.9
Pension and OPEB adjustments, net of tax	5.1			—			5.1
Total comprehensive income (loss)	266.9			(1.6		)	265.3
Share-based compensation	15.9			—			15.9
Dividends to noncontrolling interests	—			(0.2		)	(0.2		)
Dividends to ordinary shareholders	(59.9		)	—			(59.9		)
Repurchase of ordinary shares	(30.0		)	—			(30.0		)
Shares issued under incentive plans, net	2.4			—			2.4
Balance at September 30, 2018	$	596.9		$	2.1		$	599.0

16

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

The components of Equity for the nine months ended September 30, 2017 were as follows:

In millions	Allegion plc shareholders’ equity			Noncontrolling interests			Total equity
Balance at December 31, 2016	$	113.3		$	3.1		$	116.4
Net earnings	263.7			0.9			264.6
Currency translation	86.8			1.1			87.9
Change in value of derivatives qualifying as cash flow hedges, net of tax	(1.5		)	—			(1.5		)
Pension and OPEB adjustments, net of tax	(3.5		)	—			(3.5		)
Total comprehensive income	345.5			2.0			347.5
Cumulative effect of change in accounting principle	(5.0		)	—			(5.0		)
Share-based compensation	12.8			—			12.8
Dividends to noncontrolling interests	—			(0.1		)	(0.1		)
Dividends to ordinary shareholders	(45.6		)	—			(45.6		)
Repurchase of ordinary shares	(60.0		)	—			(60.0		)
Shares issued under incentive plans, net	6.2			—			6.2
Other	—			(0.1		)	(0.1		)
Balance at September 30, 2017	$	367.2		$	4.9		$	372.1

Other Comprehensive Income (Loss)

The changes in Accumulated other comprehensive loss for the nine months ended September 30, 2018 are as follows:

In millions	Cash flow hedges			Pension and OPEB Items			Foreign Currency Items			Total
December 31, 2017	$	3.8		$	(107.6	)	$	(49.1	)	$	(152.9	)
Other comprehensive income (loss) before reclassifications	6.3			2.4			(42.2		)	(33.5		)
Amounts reclassified from accumulated other comprehensive loss(a)	(3.8		)	3.3			—			(0.5		)
Tax expense	(0.7		)	(0.6		)	—			(1.3		)
September 30, 2018	$	5.6		$	(102.5	)	$	(91.3	)	$	(188.2	)

(a) Amounts reclassified from Accumulated other comprehensive loss and recognized into Net earnings related to cash flow hedges are recorded in Cost of goods sold and Interest expense. Amounts reclassified from Accumulated other comprehensive loss and recognized into Net earnings related to pension and OPEB items and foreign currency items are recorded in Other income, net.

The changes in Accumulated other comprehensive loss for the nine months ended September 30, 2017 are as follows:

In millions	Cash flow hedges			Pension and OPEB Items			Foreign Currency Items			Total
December 31, 2016	$	3.4		$	(120.5	)	$	(147.2	)	$	(264.3	)
Other comprehensive income (loss) before reclassifications	1.8			(6.5		)	86.8			82.1
Amounts reclassified from accumulated other comprehensive loss(a)	(4.0		)	3.8			—			(0.2		)
Tax benefit (expense)	0.7			(0.8		)	—			(0.1		)
September 30, 2017	$	1.9		$	(124.0	)	$	(60.4	)	$	(182.5	)

(a) Amounts reclassified from Accumulated other comprehensive loss and recognized into Net earnings related to cash flow hedges are recorded in Cost of goods sold and Interest expense. Amounts reclassified from Accumulated other

17

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

comprehensive loss and recognized into Net earnings related to pension and OPEB items and foreign currency items are recorded in Other income, net.

Note 12 – Share-Based Compensation

The Company records share-based compensation awards using a fair value method and recognizes compensation expense for an amount equal to the fair value of the share-based payment issued in its financial statements. The Company’s share-based compensation plans include programs for stock options, restricted stock units ("RSUs"), performance share units ("PSUs") and deferred compensation.

Compensation Expense

Share-based compensation expense is included in Cost of goods sold and Selling and administrative expenses. The expenses recognized for the three and nine months ended September 30 were as follows:

	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Stock options	$	1.0		$	0.7		$	3.9		$	2.7
RSUs	2.6			1.7			8.1			5.9
PSUs	1.1			1.4			4.2			4.5
Deferred compensation	0.6			0.6			1.2			2.0
Pre-tax expense	5.3			4.4			17.4			15.1
Tax benefit	(1.0		)	(1.5		)	(1.9		)	(5.0		)
After-tax expense	$	4.3		$	2.9		$	15.5		$	10.1

Stock Options/RSUs

Eligible participants may receive (i) stock options, (ii) RSUs or (iii) a combination of both stock options and RSUs. Grants issued during the nine months ended September 30 were as follows:

	2018			2017
	Number granted	Weighted- average fair value per award		Number granted	Weighted- average fair value per award
Stock options	160,849	$	21.29	165,113	$	18.22
RSUs	121,928	$	84.86	119,695	$	73.37

The fair value of each of the Company's stock option and RSU awards is expensed on a straight-line basis over the required service period, which is generally the three-year vesting period. However, for stock options and RSUs granted to retirement eligible employees, the Company recognizes expense for the fair value at the grant date.

The average fair value of the stock options granted is determined using the Black-Scholes option-pricing model. The following assumptions were used during the nine months ended September 30:

	2018		2017
Dividend yield	0.97	%	0.89	%
Volatility	22.38	%	24.93	%
Risk-free rate of return	2.75	%	2.08	%
Expected life	6.0 years		6.0 years

Expected volatility is based on the weighted average of the implied volatility of a group of the Company’s peers. The risk-free rate of return is based on the yield curve of a zero-coupon U.S. Treasury bond on the date the award is granted with a maturity equal to the expected term of the award. Historical peer data is used to estimate forfeitures within the Company’s valuation model.

18

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

The expected life of the Company’s stock option awards is derived from the simplified approach based on the weighted average time to vest and the remaining contractual term and represents the period of time that awards are expected to be outstanding.

Performance Shares

The Company has a Performance Share Program ("PSP") for key employees which provides awards in the form of PSUs based on performance against pre-established objectives. The annual target award level is expressed as a number of the Company's ordinary shares. All PSUs are settled in the form of ordinary shares unless deferred. During the nine months ended September 30, 2018, the Company granted PSUs with a maximum award level of approximately 0.1 million shares.

In February 2016, 2017 and 2018, the Company’s Compensation Committee granted PSUs that were earned based 50% upon a performance condition, measured at each reporting period by earnings per share ("EPS") performance in relation to pre-established targets set by the Compensation Committee, and 50% upon a market condition, measured by the Company’s relative total shareholder return ("TSR") against the S&P 400 Capital Goods Index over a three-year performance period. The fair values of the market conditions are estimated using a Monte Carlo Simulation approach in a risk-neutral framework to model future stock price movements based upon historical volatility, risk-free rates of return and correlation matrix.

Deferred Compensation

The Company allows key employees to defer a portion of their eligible compensation into a number of investment choices including its ordinary share equivalents. Any amounts invested in ordinary share equivalents will be settled in ordinary shares of the Company at the time of distribution.

Note 13 – Restructuring Activities

During the three months ended September 30, 2018 and 2017, the Company recorded $2.7 million and $7.4 million, respectively, of expenses associated with restructuring activities. During the nine months ended September 30, 2018 and 2017, the Company recorded $4.1 million and $8.5 million, respectively, of expenses associated with restructuring activities. These expenses are included within Cost of goods sold and Selling and administrative expenses within the Condensed and Consolidated Statements of Comprehensive Income.

The changes in the restructuring reserve during the nine months ended September 30, 2018 were as follows:

In millions	Total
December 31, 2017	$	4.2
Additions, net of reversals	4.1
Cash and non-cash uses	(5.2		)
Currency translation	(0.1		)
September 30, 2018	$	3.0

Costs accrued as of September 30, 2018 are expected to be paid within one year.

19

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

Note 14 – Other Income, Net

The components of Other income, net for the three and nine months ended September 30 were as follows:

	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Interest income	$	(0.4	)	$	(0.3	)	$	(0.7	)	$	(0.6	)
Foreign currency exchange (gain) loss	(0.8		)	(0.1		)	(1.0		)	0.4
Earnings from and gains on the sale of equity investments	—			(0.1		)	(0.1		)	(4.7		)
Net periodic pension and postretirement benefit (income) cost, less service cost	(0.7		)	1.0			(2.3		)	2.6
Other	—			(3.2		)	0.2			(3.3		)
Other income, net	$	(1.9	)	$	(2.7	)	$	(3.9	)	$	(5.6	)

Other income, net for the three and nine months ended September 30, 2018 was primarily related to Net periodic pension and postretirement benefit income, less service cost, and foreign currency exchange gains.

Other income, net for the three months ended September 30, 2017 was primarily related to a gain of $2.9 million related to a legal entity liquidation. Other income, net for the nine months ended September 30, 2017 also included a cumulative gain of $5.3 million from the sale of an equity method investment. These gains were partially offset by Net periodic pension and postretirement benefit cost, less service cost.

Note 15 – Income Taxes

The effective income tax rates for the three months ended September 30, 2018 and 2017 were 10.8% and 19.6%, respectively. The decrease in the effective tax rate compared to 2017 is primarily due to the favorable impact of the Tax Reform Act, including the reduction of the US statutory tax rate and the adjustment recorded to provisional tax amounts previously recognized (see Note 2). The decrease in the effective tax rate is also driven by the year over year change in the recognition of uncertain tax positions, and changes in the mix of income earned in lower rate jurisdictions.

The effective income tax rates for the nine months ended September 30, 2018 and 2017 were 13.1% and 16.7%, respectively. The decrease in the effective tax rate compared to 2017 is primarily due to the favorable impact of the Tax Reform Act, changes in taxes accrued on unremitted earnings and changes in the mix of income earned in lower rate jurisdictions. The favorable impact is partially offset by unfavorable year over year changes in the recognition of both uncertain tax positions and valuation allowances.

Note 16 – Earnings Per Share (EPS)

Basic EPS is calculated by dividing Net earnings attributable to Allegion plc by the weighted average number of ordinary shares outstanding for the applicable period. Diluted EPS is calculated after adjusting the denominator of the basic EPS calculation for the effect of all potentially dilutive ordinary shares, which in the Company’s case, includes shares issuable under share-based compensation plans.

The following table summarizes the weighted-average number of ordinary shares outstanding for basic and diluted EPS calculations for the three and nine months ended September 30:

	Three months ended		Nine months ended
In millions	2018	2017	2018	2017
Weighted-average number of basic shares	95.1	95.0	95.1	95.2
Shares issuable under incentive stock plans	0.7	0.8	0.7	0.8
Weighted-average number of diluted shares	95.8	95.8	95.8	96.0

At September 30, 2018, 0.1 million stock options were excluded from the computation of weighted average diluted shares outstanding because the effect of including these shares would have been anti-dilutive.

20

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

Note 17 – Net Revenues

Net revenues are recognized based on the satisfaction of performance obligations under the terms of a contract. Generally, this occurs when control of a product or service transfers to a customer. Transfer of control typically occurs when goods are shipped from our facilities or at other predetermined control transfer points (for instance, destination terms). Net revenues are measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. Persuasive evidence of a sales arrangement and fixed or determinable price are deemed to be satisfied upon receipt of an executed and legally binding sales agreement or contract that clearly defines the terms and conditions of the transaction including the respective obligations of the parties. If the defined terms and conditions allow variability in all or a component of the price, revenue is not recognized until such time that the price becomes fixed or determinable. At the point of sale, the existence of an enforceable claim that requires payment within a reasonable amount of time is validated and the collectability of that claim is assessed. If collectability is not deemed to be reasonably assured, then revenue recognition is deferred until such time that collectability becomes probable or cash is received. Service and installation revenues are recognized when earned. In some instances, customer acceptance provisions are included in sales arrangements to give the buyer the ability to ensure the delivered product or service meets the criteria established in the order. In these instances, revenue recognition is deferred until the acceptance terms specified in the arrangement are fulfilled through customer acceptance or a demonstration that established criteria have been satisfied. If uncertainty exists about customer acceptance, revenue is not recognized until acceptance has occurred. We do not adjust the transaction price for the effects of a significant financing component, as the time period between control transfer of goods and services is less than one year. The Company’s payment terms are generally consistent with the industries in which their businesses operate.

The Company has two principal revenue streams, tangible product sales and services. Approximately 99% of consolidated Net revenues involve contracts with a single performance obligation, the shipment of tangible products. The remaining Net revenues involve services including installation and consulting. Unlike the single performance obligation to ship a tangible product, the service revenue stream delays revenue recognition until the service performance obligation is satisfied.

Net revenues for tangible product sales and services by business segment for the three and nine months ended September 30, 2018 and 2017 are as follows:

	Three months ended September 30, 2018								Nine months ended September 30, 2018
in millions	Americas		EMEIA		Asia Pacific		Consolidated		Americas		EMEIA		Asia Pacific		Consolidated
Net revenues
Products	$	530.1	$	129.5	$	44.8	$	704.4	$	1,495.9	$	419.6	$	98.7	$	2,014.2
Services	—		4.9		2.2		7.1		—		12.9		2.2		15.1
Total Net Revenues	$	530.1	$	134.4	$	47.0	$	711.5	$	1,495.9	$	432.5	$	100.9	$	2,029.3

	Three months ended September 30, 2017(a)								Nine months ended September 30, 2017(a)
in millions	Americas		EMEIA		Asia Pacific		Consolidated		Americas		EMEIA		Asia Pacific		Consolidated
Net revenues
Products	$	455.2	$	120.6	$	29.1	$	604.9	$	1,331.4	$	360.2	$	81.0	$	1,772.6
Services	—		4.5		—		4.5		—		12.5		—		12.5
Total Net Revenues	$	455.2	$	125.1	$	29.1	$	609.4	$	1,331.4	$	372.7	$	81.0	$	1,785.1

(a) The Company adopted ASU 2014-09 and related updates as of January 1, 2018 on a modified retrospective basis, and as such, amounts presented for the three and nine months ended September 30, 2017 are based on ASC 605.

Tangible product sales are recognized at a point in time at which transfer of control has occurred. Service revenues are recognized over time using a time-based output method applied over the contract term beginning on the date that the service or installation is either provided or made available to the customer. We used the practical expedients to omit the disclosure of remaining performance obligations for contracts with an original expected duration of one year or less and for contracts where we have the right to invoice for performance completed to date. As of September 30, 2018, the contract liability associated with contract revenue is not material. As a practical expedient, we recognize incremental costs of obtaining a contract, if any, as an expense when incurred if the

21

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

amortization period of the asset would have been one year or less. We do not have any costs to obtain or fulfill a contract that are capitalized under ASC 606.

The Company does offer various sales incentive programs to customers, dealers, and distributors that do not preclude revenue recognition, but do require an accrual for the best estimate of expected activity. These items are accrued for over time based on the Company's historical rates of providing these incentives and annual forecasted sales volumes. During the three and nine months ended September 30, 2018, no adjustments related to performance obligations satisfied in previous periods were recorded. Examples of the sales incentives that are accrued for as a contra receivable and sales deduction at the point of sale include, but are not limited to, discounts (i.e. net 30 type), coupons, and rebates where the customer does not have to provide any additional requirements to receive the discount. Sales returns and customer disputes involving a question of quantity or price are also accounted for as a reduction in revenue and a contra receivable. All other incentives or incentive programs where the customer is required to reach a certain sales level, remain a customer for a certain period, provide a rebate form or is subject to additional requirements are accounted for as a reduction of revenue and establishment of a liability. The Company also offers a standard warranty with most product sales and the value of such warranty is included in the contractual price. The corresponding cost of the warranty obligation is accrued as a liability (see Note 19).

Sales, value-added and other similar taxes that we collect are excluded from revenue. We have elected to account for shipping and handling activities that occur after control of the related goods transfers as fulfillment activities instead of performance obligations.

Note 18 – Business Segment Information

The Company classifies its businesses into the following three reportable segments based on industry and market focus: Americas, EMEIA and Asia Pacific.

The Company largely evaluates performance based on Segment operating income and Segment operating margins. Segment operating income is the measure of profit and loss that the Company’s chief operating decision maker uses to evaluate the financial performance of the business and as the basis for resource allocation, performance reviews, and compensation. For these reasons, the Company believes that Segment operating income represents the most relevant measure of segment profit and loss. The Company’s chief operating decision maker may exclude certain charges or gains, such as corporate charges and other special charges, from Operating income to arrive at a Segment operating income that is a more meaningful measure of profit and loss upon which to base its operating decisions. The Company defines Segment operating margin as Segment operating income as a percentage of Net revenues.

22

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

A summary of operations by reportable segment for the three and nine months ended September 30 was as follows:

	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Net revenues
Americas	$	530.1		$	455.2		$	1,495.9		$	1,331.4
EMEIA	134.4			125.1			432.5			372.7
Asia Pacific	47.0			29.1			100.9			81.0
Total	$	711.5		$	609.4		$	2,029.3		$	1,785.1
Segment operating income
Americas	$	153.8		$	133.2		$	415.5		$	383.6
EMEIA	7.6			8.6			27.3			23.1
Asia Pacific	1.5			2.2			0.8			5.1
Total	162.9			144.0			443.6			411.8
Reconciliation to Operating income
Unallocated corporate expense	(20.6		)	(16.9		)	(59.2		)	(50.2		)
Operating income	142.3			127.1			384.4			361.6
Reconciliation to earnings before income taxes
Interest expense	14.0			17.8			40.3			49.7
Other income, net	(1.9		)	(2.7		)	(3.9		)	(5.6		)
Earnings before income taxes	$	130.2		$	112.0		$	348.0		$	317.5

Note 19 – Commitments and Contingencies

The Company is involved in various litigations, claims and administrative proceedings, including those related to environmental and product warranty matters. Amounts recorded for identified contingent liabilities are estimates, which are reviewed periodically and adjusted to reflect additional information when it becomes available. Subject to the uncertainties inherent in estimating future costs for contingent liabilities, except as expressly set forth in this note, management believes that any liability which may result from these legal matters would not have a material adverse effect on the financial condition, results of operations, liquidity or cash flows of the Company.

Environmental Matters

The Company is dedicated to an environmental program to reduce the utilization and generation of hazardous materials during the manufacturing process and to remediate identified environmental concerns. As to the latter, the Company is currently engaged in site investigations and remediation activities to address environmental cleanup from past operations at current and former production facilities. The Company regularly evaluates its remediation programs and considers alternative remediation methods that are in addition to, or in replacement of, those currently utilized by the Company based upon enhanced technology and regulatory changes. Changes to the Company's remediation programs may result in increased expenses and increased environmental reserves.

The Company is sometimes a party to environmental lawsuits and claims and from time to time receives notices of potential violations of environmental laws and regulations from the U.S. Environmental Protection Agency and similar state authorities. It has also been identified as a potentially responsible party ("PRP") for cleanup costs associated with off-site waste disposal at federal Superfund and state remediation sites. For all such sites, there are other PRPs and, in most instances, the Company’s involvement is minimal.

In estimating its liability, the Company has assumed it will not bear the entire cost of remediation of any site to the exclusion of other PRPs who may be jointly and severally liable. The ability of other PRPs to participate has been taken into account, based on our understanding of the parties’ financial condition and probable contributions on a per site basis. Additional lawsuits and claims involving environmental matters are likely to arise from time to time in the future.

23

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

During the three months ended September 30, 2018 and 2017, the Company recorded $0.4 million and $0.5 million of expenses for environmental remediation at sites presently or formerly owned or leased by the Company. During the nine months ended September 30, 2018 and 2017, the Company recorded $1.7 million and $2.0 million of expenses for environmental remediation at sites presently or formerly owned or leased by the Company.

As of September 30, 2018 and December 31, 2017, the Company has recorded reserves for environmental matters of $24.1 million and $28.9 million, respectively. The total reserve at September 30, 2018 and December 31, 2017, included $6.7 million and $8.9 million, respectively, related to remediation of sites previously disposed by the Company. Environmental reserves are classified as Accrued expenses and other current liabilities or Other noncurrent liabilities based on their expected term. The Company's total current environmental reserve at September 30, 2018 and December 31, 2017 was $6.4 million and $12.6 million, respectively, and the remainder is classified as noncurrent. Given the evolving nature of environmental laws, regulations and technology, the ultimate cost of future compliance is uncertain.

Warranty Liability

Standard product warranty accruals are recorded at the time of sale and are estimated based upon product warranty terms and historical experience. The Company assesses the adequacy of its liabilities and will make adjustments as necessary based on known or anticipated warranty claims, or as new information becomes available.

The changes in the standard product warranty liability for the nine months ended September 30 were as follows:

In millions	2018			2017
Balance at beginning of period	$	14.1		$	13.3
Reductions for payments	(5.9		)	(5.5		)
Accruals for warranties issued during the current period	6.1			6.2
Changes to accruals related to preexisting warranties	(0.1		)	(0.7		)
Acquisitions	0.5			—
Translation	(0.1		)	0.4
Balance at end of period	$	14.6		$	13.7

Standard product warranty liabilities are classified as Accrued expenses and other current liabilities.

Note 20 – Guarantor Financial Information

Allegion US Hold Co is the issuer of the 3.200% and 3.550% Senior Notes. Allegion plc is the guarantor of the 3.200% and 3.550% Senior Notes. The following condensed and consolidated financial information of Allegion plc, Allegion US Hold Co, and the other Allegion subsidiaries that are not guarantors (the "Other Subsidiaries") on a combined basis as of September 30, 2018 and for the three and nine months ended September 30, 2018 and 2017, is being presented in order to meet the reporting requirements under the Senior Notes indenture and Rule 3-10 of Regulation S-X. In accordance with Rule 3-10(d) of Regulation S-X, separate financial statements for the Issuer, Allegion plc, whom is the guarantor, are not required to be filed with the SEC as the subsidiary debt issuer is directly or indirectly 100% owned by the Parent, whom is the guarantor, and the guarantees are full and unconditional and joint and several.

During the nine months ended September 30, 2018, an entity previously presented in the "Other Subsidiaries" column merged with Allegion US Hold Co. The entity merged with Allegion US Hold Co primarily includes intercompany investments and related equity; there is no material statement of comprehensive income or cash flow activity related to this entity. As a result, the following condensed and consolidated financial information presented below as of December 31, 2017, and for the three and nine months ended September 30, 2017 has been updated to reflect this new structure.

24

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

Condensed and Consolidated Statement of Comprehensive Income

For the three months ended September 30, 2018

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net revenues	$	—		$	—		$	711.5		$	—		$	711.5
Cost of goods sold	—			—			402.1			—			402.1
Selling and administrative expenses	1.3			—			165.8			—			167.1
Operating income (loss)	(1.3		)	—			143.6			—			142.3
Equity earnings (loss) in affiliates, net of tax	124.5			73.2			—			(197.7		)	—
Interest expense	7.2			6.4			0.4			—			14.0
Intercompany interest and fees	—			26.3			(26.3		)	—			—
Other income, net	—			—			(1.9		)	—			(1.9		)
Earnings (loss) before income taxes	116.0			40.5			171.4			(197.7		)	130.2
Provision (benefit) for income taxes	—			(7.7		)	21.8			—			14.1
Net earnings (loss)	116.0			48.2			149.6			(197.7		)	116.1
Less: Net loss attributable to noncontrolling interests	—			—			0.1			—			0.1
Net earnings (loss) attributable to Allegion plc	$	116.0		$	48.2		$	149.5		$	(197.7	)	$	116.0
Total comprehensive income (loss)	$	103.9		$	48.1		$	142.5		$	(191.2	)	$	103.3
Less: Total comprehensive loss attributable to noncontrolling interests	—			—			(0.6		)	—			(0.6		)
Total comprehensive income (loss) attributable to Allegion plc	$	103.9		$	48.1		$	143.1		$	(191.2	)	$	103.9

25

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

Condensed and Consolidated Statement of Comprehensive Income

For the nine months ended September 30, 2018

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net revenues	$	—		$	—		$	2,029.3		$	—		$	2,029.3
Cost of goods sold	—			—			1,156.5			—			1,156.5
Selling and administrative expenses	4.6			—			483.8			—			488.4
Operating income (loss)	(4.6		)	—			389.0			—			384.4
Equity earnings (loss) in affiliates, net of tax	327.0			146.4			—			(473.4		)	—
Interest expense	20.3			19.4			0.6			—			40.3
Intercompany interest and fees	—			78.2			(78.2		)	—			—
Other income, net	—			—			(3.9		)	—			(3.9		)
Earnings (loss) before income taxes	302.1			48.8			470.5			(473.4		)	348.0
Provision (benefit) for income taxes	—			(20.0		)	65.5			—			45.5
Net earnings (loss)	302.1			68.8			405.0			(473.4		)	302.5
Less: Net earnings attributable to noncontrolling interests	—			—			0.4			—			0.4
Net earnings (loss) attributable to Allegion plc	$	302.1		$	68.8		$	404.6		$	(473.4	)	$	302.1
Total comprehensive income (loss)	$	266.9		$	70.7		$	365.8		$	(438.1	)	$	265.3
Less: Total comprehensive loss attributable to noncontrolling interests	—			—			(1.6		)	—			(1.6		)
Total comprehensive income (loss) attributable to Allegion plc	$	266.9		$	70.7		$	367.4		$	(438.1	)	$	266.9

26

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

Condensed and Consolidated Statement of Comprehensive Income

For the three months ended September 30, 2017

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net revenues	$	—		$	—		$	609.4		$	—		$	609.4
Cost of goods sold	—			—			335.0			—			335.0
Selling and administrative expenses	1.2			—			146.1			—			147.3
Operating income (loss)	(1.2		)	—			128.3			—			127.1
Equity earnings (loss) in affiliates, net of tax	104.2			(16.5		)	—			(87.7		)	—
Interest expense (income)	13.2			4.7			(0.1		)	—			17.8
Intercompany interest and fees	—			(75.2		)	75.2			—			—
Other income, net	—			—			(2.7		)	—			(2.7		)
Earnings (loss) before income taxes	89.8			54.0			55.9			(87.7		)	112.0
Provision (benefit) for income taxes	—			27.2			(5.3		)	—			21.9
Net earnings (loss)	89.8			26.8			61.2			(87.7		)	90.1
Less: Net earnings attributable to noncontrolling interests	—			—			0.3			—			0.3
Net earnings (loss) attributable to Allegion plc	$	89.8		$	26.8		$	60.9		$	(87.7	)	$	89.8
Total comprehensive income (loss)	$	111.9		$	27.1		$	84.0		$	(110.3	)	$	112.7
Less: Total comprehensive income attributable to noncontrolling interests	—			—			0.8			—			0.8
Total comprehensive income (loss) attributable to Allegion plc	$	111.9		$	27.1		$	83.2		$	(110.3	)	$	111.9

27

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

Condensed and Consolidated Statement of Comprehensive Income

For the nine months ended September 30, 2017

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net revenues	$	—		$	—		$	1,785.1		$	—		$	1,785.1
Cost of goods sold	—			—			988.2			—			988.2
Selling and administrative expenses	3.8			—			431.5			—			435.3
Operating income (loss)	(3.8		)	—			365.4			—			361.6
Equity earnings (loss) in affiliates, net of tax	302.8			53.5			0.6			(356.9		)	—
Interest expense	35.3			14.2			0.2			—			49.7
Intercompany interest and fees	—			(21.1		)	21.1			—			—
Other income, net	—			—			(5.6		)	—			(5.6		)
Earnings (loss) before income taxes	263.7			60.4			350.3			(356.9		)	317.5
Provision for income taxes	—			2.8			50.1			—			52.9
Net earnings (loss)	263.7			57.6			300.2			(356.9		)	264.6
Less: Net earnings attributable to noncontrolling interests	—			—			0.9			—			0.9
Net earnings (loss) attributable to Allegion plc	$	263.7		$	57.6		$	299.3		$	(356.9	)	$	263.7
Total comprehensive income (loss)	$	345.5		$	57.2		$	384.3		$	(439.5	)	$	347.5
Less: Total comprehensive income attributable to noncontrolling interests	—			—			2.0			—			2.0
Total comprehensive income (loss) attributable to Allegion plc	$	345.5		$	57.2		$	382.3		$	(439.5	)	$	345.5

28

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

Condensed and Consolidated Balance Sheet

September 30, 2018

In millions	Allegion plc		Allegion US Holding			Other Subsidiaries		Consolidating Adjustments			Total
Current assets:
Cash and cash equivalents	$	0.6	$	14.0		$	175.1	$	—		$	189.7
Restricted cash	—		—			6.8		—			6.8
Accounts and notes receivable, net	—		—			361.4		—			361.4
Inventories	—		—			278.3		—			278.3
Other current assets	0.8		24.7			20.2		(8.6		)	37.1
Accounts and notes receivable affiliates	—		473.6			342.8		(816.4		)	—
Total current assets	1.4		512.3			1,184.6		(825.0		)	873.3
Investment in affiliates	1,227.8		652.9			—		(1,880.7		)	—
Property, plant and equipment, net	—		—			273.3		—			273.3
Goodwill and other intangible assets, net	—		—			1,436.4		—			1,436.4
Notes receivable affiliates	25.5		1,483.7			2,613.8		(4,123.0		)	—
Other noncurrent assets	4.3		30.4			112.4		—			147.1
Total assets	$	1,259.0	$	2,679.3		$	5,620.5	$	(6,828.7	)	$	2,730.1
Current liabilities:
Accounts payable and accruals	$	1.8	$	13.5		$	445.2	$	(8.6	)	$	451.9
Short-term borrowings and current maturities of long-term debt	35.0		—			—		—			35.0
Accounts and notes payable affiliates	—		342.9			473.5		(816.4		)	—
Total current liabilities	36.8		356.4			918.7		(825.0		)	486.9
Long-term debt	624.2		792.5			1.0		—			1,417.7
Notes payable affiliate	—		2,613.8			1,509.2		(4,123.0		)	—
Other noncurrent liabilities	1.1		4.7			220.7		—			226.5
Total liabilities	662.1		3,767.4			2,649.6		(4,948.0		)	2,131.1
Equity:
Total shareholders equity (deficit)	596.9		(1,088.1		)	2,968.8		(1,880.7		)	596.9
Noncontrolling interests	—		—			2.1		—			2.1
Total equity (deficit)	596.9		(1,088.1		)	2,970.9		(1,880.7		)	599.0
Total liabilities and equity	$	1,259.0	$	2,679.3		$	5,620.5	$	(6,828.7	)	$	2,730.1

29

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

Condensed and Consolidated Balance Sheet

December 31, 2017

In millions	Allegion plc		Allegion US Holding			Other Subsidiaries		Consolidating Adjustments			Total
Current assets:
Cash and cash equivalents	$	0.7	$	0.3		$	465.2	$	—		$	466.2
Accounts and notes receivable, net	—		—			296.6		—			296.6
Inventories	—		—			239.8		—			239.8
Other current assets	0.3		56.3			17.6		(44.1		)	30.1
Accounts receivable affiliates	—		430.0			305.3		(735.3		)	—
Total current assets	1.0		486.6			1,324.5		(779.4		)	1,032.7
Investment in affiliates	1,079.6		240.8			—		(1,320.4		)	—
Property, plant and equipment, net	—		—			252.2		—			252.2
Goodwill and other intangible assets, net	—		—			1,155.5		—			1,155.5
Notes receivable affiliates	3.5		1,580.3			2,381.0		(3,964.8		)	—
Other noncurrent assets	5.1		5.5			91.0		—			101.6
Total assets	$	1,089.2	$	2,313.2		$	5,204.2	$	(6,064.6	)	$	2,542.0
Current liabilities:
Accounts payable and accruals	$	1.9	$	7.0		$	461.0	$	(44.1	)	$	425.8
Short-term borrowings and current maturities of long-term debt	35.0		—			—		—			35.0
Accounts and notes payable affiliates	0.2		304.9			430.2		(735.3		)	—
Total current liabilities	37.1		311.9			891.2		(779.4		)	460.8
Long-term debt	649.3		792.0			1.0		—			1,442.3
Notes payables affiliate	—		2,381.0			1,583.8		(3,964.8		)	—
Other noncurrent liabilities	1.2		4.2			228.0		—			233.4
Total liabilities	687.6		3,489.1			2,704.0		(4,744.2		)	2,136.5
Equity:
Total shareholders equity (deficit)	401.6		(1,175.9		)	2,496.3		(1,320.4		)	401.6
Noncontrolling interests	—		—			3.9		—			3.9
Total equity (deficit)	401.6		(1,175.9		)	2,500.2		(1,320.4		)	405.5
Total liabilities and equity	$	1,089.2	$	2,313.2		$	5,204.2	$	(6,064.6	)	$	2,542.0

30

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

Condensed and Consolidated Statement of Cash Flows

For the nine months ended September 30, 2018

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net cash provided by (used in) operating activities	$	135.4		$	(68.5	)	$	402.5		$	(209.0	)	$	260.4
Cash flows from investing activities:
Capital expenditures	—			—			(31.8		)	—			(31.8		)
Acquisition of and equity investments in businesses, net of cash acquired	—			(247.1		)	(128.7		)	—			(375.8		)
Other investing activities, net	—			—			(1.1		)	—			(1.1		)
Net cash used in investing activities	—			(247.1		)	(161.6		)	—			(408.7		)
Cash flows from financing activities:
Debt repayments, net	(26.3		)	—			(1.1		)	—			(27.4		)
Net inter-company proceeds (payments)	(22.0		)	329.3			(307.3		)	—			—
Dividends paid	—			—			(209.0		)	209.0			—
Dividends paid to shareholders	(59.6		)	—			—			—			(59.6		)
Repurchase of ordinary shares	(30.0		)	—			—			—			(30.0		)
Other financing activities, net	2.4			—			(2.3		)	—			0.1
Net cash (used in) provided by financing activities	(135.5		)	329.3			(519.7		)	209.0			(116.9		)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	—			—			(4.5		)	—			(4.5		)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(0.1		)	13.7			(283.3		)	—			(269.7		)
Cash, cash equivalents, and restricted cash - beginning of period	0.7			0.3			465.2			—			466.2
Cash, cash equivalents, and restricted cash - end of period	$	0.6		$	14.0		$	181.9		$	—		$	196.5

31

ALLEGION PLC

NOTES TO CONDENSED AND CONSOLIDATED FINANCIAL STATEMENTS-(Continued)

(Unaudited)

Condensed and Consolidated Statement of Cash Flows

For the nine months ended September 30, 2017

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net cash provided by (used in) operating activities	$	67.4		$	123.1		$	193.1		$	(213.6	)	$	170.0
Cash flows from investing activities:
Capital expenditures	—			—			(33.7		)	—			(33.7		)
Acquisition of businesses, net of cash acquired	—			—			(20.8		)	—			(20.8		)
Proceeds from sales and maturities of marketable securities	—			—			15.5			—			15.5
Other investing activities, net	—			—			2.9			—			2.9
Net cash used in investing activities	—			—			(36.1		)	—			(36.1		)
Cash flows from financing activities:
Debt repayments, net	(14.8		)	—			(1.3		)	—			(16.1		)
Debt issuance costs	(2.9		)	(0.1		)	—			—			(3.0		)
Net inter-company proceeds (payments)	50.3			(17.5		)	(32.8		)	—			—
Dividends paid	—			(105.5		)	(108.1		)	213.6			—
Dividends paid to shareholders	(45.6		)	—			—			—			(45.6		)
Repurchase of ordinary shares	(60.0		)	—			—			—			(60.0		)
Other financing activities, net	6.2			—			(0.2		)	—			6.0
Net cash (used in) provided by financing activities	(66.8		)	(123.1		)	(142.4		)	213.6			(118.7		)
Effect of exchange rate changes on cash and cash equivalents	—			—			7.3			—			7.3
Net increase in cash and cash equivalents	0.6			—			21.9			—			22.5
Cash and cash equivalents - beginning of period	0.5			0.2			311.7			—			312.4
Cash and cash equivalents - end of period	$	1.1		$	0.2		$	333.6		$	—		$	334.9

32

Item 2 – Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following Management’s Discussion and Analysis of Financial Condition and Results of Operations contains forward-looking statements that involve risks and uncertainties. Our actual results may differ materially from the results discussed in the forward-looking statements. Factors that may cause a difference include, but are not limited to, those discussed under Part I, Item 1A – Risk Factors in the Annual Report on Form 10-K for the fiscal year ended December 31, 2017. The following section is qualified in its entirety by the more detailed information, including our condensed and consolidated financial statements and the notes thereto, which appears elsewhere in this Quarterly Report.

Overview

Organization

Allegion plc ("Allegion," "we," "our," or "us") is a leading global provider of security products and solutions operating in three geographic regions: Americas, EMEIA, and Asia Pacific. We sell a wide range of security products and solutions for end-users in commercial, institutional and residential markets worldwide, including into the education, healthcare, government, commercial office and single and multi-family residential markets. Our corporate brands include CISA, Interflex, LCN, Schlage, SimonsVoss, and Von Duprin.

Recent Developments

2018 Acquisitions

During the nine months ended September 30, 2018, we completed six acquisitions:

Business	Date
Technical Glass Products, Inc. ("TGP")	January 2018
Hammond Enterprises, Inc. ("Hammond")	January 2018
Qatar Metal Industries LLC ("QMI")	February 2018
AD Systems, Inc. ("AD Systems")	March 2018
Gainsborough Hardware and API Locksmiths ("Door and Access Systems")	July 2018
ISONAS Security Systems, Inc. ("ISONAS")	July 2018

TGP provides fire-rated architectural glass and framing solutions for commercial buildings, as well as non-fire rated architectural glass and framing, including channel glass systems and curtain walls throughout the United States, Canada, and select markets in the Middle East. TGP has been integrated into our Americas and EMEIA segments.

We acquired 100% of the machinery, equipment, and intellectual property of a division of Hammond. The assets acquired have been integrated into our existing production facilities and are specific to our Schlage-branded products.

QMI specializes in fire rated and non-fire rated steel and wooden doors, acoustic doors, and wooden cabinets, as well as fire rated curtain wall systems and access panels in Qatar, Saudi Arabia, Bahrain, Oman, Kuwait, the United Arab Emirates, and Africa. QMI has been integrated into our EMEIA segment.

AD Systems designs and manufactures high-performance interior and storefront door systems, specializing in sliding and acoustic solutions. AD Systems' portfolio includes sliding and swinging doors, perimeter frames, door hardware, gasketing, seals and sidelite panels. AD Systems has been integrated into our Americas segment.

Door and Access Systems, based in Australia, includes the brands Gainsborough Hardware, the market-leading residential door hardware brand in Australia, and API Locksmiths, which serves the Australian market with its keying, installation and access control services. Door and Access Systems has been integrated into our Asia Pacific segment.

ISONAS designs and manufactures edge-computing technology that produces Power over Ethernet access control solutions for non-residential end-markets. ISONAS has been integrated into our Americas segment.

2018 Dividends

Through September 30, 2018, we paid dividends of $0.63 per ordinary share to shareholders.

33

Share repurchases

During the first nine months of 2018, we repurchased approximately 0.4 million shares for approximately $30.0 million.

34

Results of Operations – Three months endedSeptember 30

In millions, except per share amounts	2018			% of revenues		2017			% of revenues
Net revenues	$	711.5				$	609.4
Cost of goods sold	402.1			56.5	%	335.0			55.0	%
Selling and administrative expenses	167.1			23.5	%	147.3			24.2	%
Operating income	142.3			20.0	%	127.1			20.9	%
Interest expense	14.0					17.8
Other income, net	(1.9		)			(2.7		)
Earnings before income taxes	130.2					112.0
Provision for income taxes	14.1					21.9
Net earnings	116.1					90.1
Less: Net earnings attributable to noncontrolling interests	0.1					0.3
Net earnings attributable to Allegion plc	$	116.0				$	89.8
Diluted net earnings per ordinary share attributable to Allegion plc ordinary shareholders:
Net earnings	$	1.21				$	0.94

The discussions that follow describe the significant factors contributing to the changes in our results of operations for the periods presented.

Net Revenues

Net revenues for the three months ended September 30, 2018 increased by 16.8%, or $102.1 million, compared with the same period in 2017, which resulted from the following:

Pricing	2.2	%
Volume	6.3	%
Acquisitions	9.0	%
Currency exchange rates	(0.7	)%
Total	16.8	%

The increase in Net revenues was primarily driven by higher volumes, improved pricing and acquisitions during the current year partially offset by unfavorable foreign currency exchange rate movements.

Operating Income/Margin

Operating income for the three months ended September 30, 2018 increased $15.2 million compared to the same period in 2017 and operating margin for the three months ended September 30, 2018 decreased to 20.0% from 20.9% for the same period in 2017 due to the following:

in millions	Operating Income			Operating Margin
September 30, 2017	$	127.1		20.9	%
Inflation in excess of pricing and productivity	(1.9		)	(0.8	)%
Volume / product mix	15.3			1.1	%
Restructuring / acquisition expenses	1.8			0.3	%
Currency exchange rates	0.2			0.2	%
Investment spending	(3.2		)	(0.5	)%
Acquisitions	3.0			(1.2	)%
September 30, 2018	$	142.3		20.0	%

35

Operating income increased primarily due to favorable volume/product mix, decreased restructuring and acquisition expenses, favorable foreign currency exchange rate movements and acquisitions during the current year. These increases were partially offset by inflation in excess of pricing and productivity and increased investment spending.

Operating margin decreased primarily due to inflation in excess of pricing and productivity, increased investment spending, and lower margins from acquisitions during the current year. These decreases were partially offset by favorable volume/product mix, decreased restructuring and acquisition expenses, and favorable foreign currency exchange rate movements.

Interest Expense

Interest expense for the three months ended September 30, 2018 decreased $3.8 million compared with the same period in 2017 primarily due to lower interest rates on our outstanding indebtedness due to the refinancing of our Credit Facilities, issuance of two new senior notes and redemption of two previously outstanding senior notes in the third and fourth quarters of 2017. Interest expense for the three months ended September 30, 2017 also included approximately $1.6 million of non-recurring costs associated with the refinancing of the Credit Facilities.

Other Income, Net

The components of Other income, net for the three months ended September 30, 2018 and 2017 were as follows:

In millions	2018			2017
Interest income	$	(0.4	)	$	(0.3	)
Foreign currency exchange gain	(0.8		)	(0.1		)
Earnings from and gains on the sale of equity investments	—			(0.1		)
Net periodic pension and postretirement benefit (income) cost, less service cost	(0.7		)	1.0
Other	—			(3.2		)
Other income, net	$	(1.9	)	$	(2.7	)

Other income, net for the three months ended September 30, 2018 was lower by $0.8 million compared to the same period in 2017, due to a gain of $2.9 million related to a legal entity liquidation during the three months ended September 30, 2017 that did not recur during the current year. This decrease was partially offset by Net periodic pension and postretirement benefit income, less service cost of $0.7 million for the three months ended September 30, 2018, compared to Net periodic pension and postretirement benefit cost, less service cost of $1.0 million for the same period of 2017.

Provision for Income Taxes

The effective income tax rates for the three months ended September 30, 2018 and 2017 were 10.8% and 19.6%, respectively. The decrease in the effective tax rate compared to 2017 is primarily due to the favorable impact of the Tax Reform Act, including the reduction of the US statutory tax rate and the adjustment recorded to provisional tax amounts previously recognized (see Note 2). The decrease in the effective tax rate is also driven by the year over year change in the recognition of uncertain tax positions, and changes in the mix of income earned in lower rate jurisdictions.

36

Results of Operations – Nine months endedSeptember 30

In millions, except per share amounts	2018			% of revenues		2017			% of revenues
Net revenues	$	2,029.3				$	1,785.1
Cost of goods sold	1,156.5			57.0	%	988.2			55.4	%
Selling and administrative expenses	488.4			24.1	%	435.3			24.4	%
Operating income	384.4			18.9	%	361.6			20.3	%
Interest expense	40.3					49.7
Other income, net	(3.9		)			(5.6		)
Earnings before income taxes	348.0					317.5
Provision for income taxes	45.5					52.9
Net earnings	302.5					264.6
Less: Net earnings attributable to noncontrolling interests	0.4					0.9
Net earnings attributable to Allegion plc	$	302.1				$	263.7
Diluted net earnings per ordinary share attributable to Allegion plc ordinary shareholders:
Net earnings	$	3.15				$	2.75

The discussions that follow describe the significant factors contributing to the changes in our results of operations for the periods presented.

Net Revenues

Net revenues for the nine months ended September 30, 2018 increased by 13.7%, or $244.2 million, compared with the same period in 2017, which resulted from the following:

Pricing	1.6	%
Volume	4.2	%
Acquisitions	6.4	%
Currency exchange rates	1.5	%
Total	13.7	%

The increase in Net revenues was primarily driven by higher volumes, improved pricing, acquisitions during the current year, and favorable foreign currency exchange rate movements.

Operating Income/Margin

Operating income for the nine months ended September 30, 2018 increased $22.8 million compared to the same period in 2017 and operating margin for the nine months ended September 30, 2018 decreased to 18.9% from 20.3% for the same period in 2017 due to the following:

in millions	Operating Income			Operating Margin
September 30, 2017	$	361.6		20.3	%
Inflation in excess of pricing and productivity	(3.8		)	(0.5	)%
Volume / product mix	30.5			0.8	%
Restructuring / acquisition expenses	(0.4		)	—	%
Currency exchange rates	4.7			—	%
Investment spending	(11.2		)	(0.6	)%
Acquisitions	3.0			(1.1	)%
September 30, 2018	$	384.4		18.9	%

37

Operating income increased primarily due to favorable volume/product mix, foreign currency exchange rate movements and acquisitions during the current year. These increases were partially offset by inflation in excess of pricing and productivity, restructuring and acquisition expenses and increased investment spending.

Operating margin decreased primarily due to inflation in excess of pricing and productivity, increased investment spending and lower margins from acquisitions during the current year. These decreases were partially offset by favorable volume/product mix.

Interest Expense

Interest expense for the nine months ended September 30, 2018 decreased $9.4 million compared with the same period in 2017 primarily due to lower interest rates on our outstanding indebtedness due to the refinancing of our Credit Facilities, issuance of two new senior notes and redemption of two previously outstanding senior notes in the third and fourth quarters of 2017. Interest expense for the nine months ended September 30, 2017 also included approximately $1.6 million of non-recurring costs associated with the refinancing of the Credit Facilities.

Other Income, Net

The components of Other income, net for the nine months ended September 30, 2018 and 2017 were as follows:

In millions	2018			2017
Interest income	$	(0.7	)	$	(0.6	)
Foreign currency exchange (gain) loss	(1.0		)	0.4
Earnings from and gains on the sale of equity investments	(0.1		)	(4.7		)
Net periodic pension and postretirement benefit (income) cost, less service cost	(2.3		)	2.6
Other	0.2			(3.3		)
Other income, net	$	(3.9	)	$	(5.6	)

Other income, net for the nine months ended September 30, 2018 was lower by $1.7 million compared to the same period in 2017, due to a cumulative gain of $5.3 million from the sale of an equity method investment during the prior year and a gain of $2.9 million related to a legal entity liquidation during the three months ended September 30, 2017, neither of which were recurring during the current year. These decreases were partially offset by Net periodic pension and postretirement benefit income, less service cost of $2.3 million for the nine months ended September 30, 2018, compared to Net periodic pension and postretirement benefit cost, less service cost of $2.6 million for the same period of 2017.

Provision for Income Taxes

The effective income tax rates for the nine months ended September 30, 2018 and 2017 were 13.1% and 16.7%, respectively. The decrease in the effective tax rate compared to 2017 is primarily due to the favorable impact of the Tax Reform Act, changes in taxes accrued on unremitted earnings and changes in the mix of income earned in lower rate jurisdictions. The favorable impact is partially offset by unfavorable year over year changes in the recognition of both uncertain tax positions and valuation allowances.

Review of Business Segments

We operate in and report financial results for three segments: Americas, EMEIA, and Asia Pacific. These segments represent the level at which our chief operating decision maker reviews our financial performance and makes operating decisions.

Segment operating income is the measure of profit and loss that our chief operating decision maker uses to evaluate the financial performance of the business and as the basis for resource allocation, performance reviews, and compensation. For these reasons, we believe that Segment operating income represents the most relevant measure of segment profit and loss. Our chief operating decision maker may exclude certain charges or gains, such as corporate charges and other special charges from Operating income, to arrive at a Segment operating income that is a more meaningful measure of profit and loss upon which to base our operating decisions. We define Segment operating margin as Segment operating income as a percentage of Net revenues.

The segment discussions that follow describe the significant factors contributing to the changes in results for each segment included in Net earnings.

38

Segment Results of Operations - For the three and nine months ended September 30

	Three months ended								Nine months ended
in millions	2018			2017			% Change		2018			2017			% Change
Net revenues
Americas	$	530.1		$	455.2		16.5	%	$	1,495.9		$	1,331.4		12.4	%
EMEIA	134.4			125.1			7.4	%	432.5			372.7			16.0	%
Asia Pacific	47.0			29.1			61.5	%	100.9			81.0			24.6	%
Total	$	711.5		$	609.4				$	2,029.3		$	1,785.1
Segment operating income
Americas	$	153.8		$	133.2		15.5	%	$	415.5		$	383.6		8.3	%
EMEIA	7.6			8.6			(11.6	)%	27.3			23.1			18.2	%
Asia Pacific	1.5			2.2			(31.8	)%	0.8			5.1			(84.3	)%
Total	$	162.9		$	144.0				$	443.6		$	411.8
Segment operating margin
Americas	29.0		%	29.3		%			27.8		%	28.8		%
EMEIA	5.7		%	6.9		%			6.3		%	6.2		%
Asia Pacific	3.2		%	7.6		%			0.8		%	6.3		%

Americas

Our Americas segment is a leading provider of security products and solutions in approximately 30 countries throughout North America, Central America, the Caribbean and South America. The segment sells a broad range of products and solutions including, locks, locksets, portable locks, key systems, door closers, exit devices, doors and door systems, electronic product and access control systems to end-users in commercial, institutional and residential facilities, including into the education, healthcare, government, commercial office and single and multi-family residential markets. This segment’s primary brands are LCN, Schlage, and Von Duprin.

Net Revenues

Net revenues for the three months ended September 30, 2018 increased by 16.5%, or $74.9 million, compared to the same period in 2017 due to the following:

Pricing	2.5	%
Volume	7.6	%
Acquisitions	6.6	%
Currency exchange rates	(0.2	)%
Total	16.5	%

The increase in Net revenues is primarily due to higher volumes, improved pricing and acquisitions in the current year. These increases were partially offset by unfavorable foreign currency exchange rate movements. Net revenues from non-residential products for the three months ended September 30, 2018 increased high teens compared to the same period in the prior year, primarily driven by higher volumes, improved pricing, and acquisitions in the current year. Net revenues from residential products for the three months ended September 30, 2018 increased high single digits compared to the same period in the prior year.

Net revenues for the nine months ended September 30, 2018 increased by 12.4%, or $164.5 million, compared to the same period in 2017 due to the following:

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Pricing	1.8	%
Volume	4.8	%
Acquisitions	5.7	%
Currency exchange rates	0.1	%
Total	12.4	%

The increase in Net revenues is primarily due to higher volumes, improved pricing, favorable foreign currency exchange rate movements and acquisitions in the current year. Net revenues from non-residential products for the nine months ended September 30, 2018 increased mid teens compared to the same period in the prior year, primarily driven by higher volumes, improved pricing, and acquisitions in the current year. Net revenues from residential products for the nine months ended September 30, 2018 increased mid single digits compared to the same period in the prior year.

Operating income/margin

Segment operating income for the three months ended September 30, 2018 increased $20.6 million and segment operating margin decreased to 29.0% from 29.3% compared to the same period in 2017 due to the following:

in millions	Operating Income			Operating Margin
September 30, 2017	$	133.2		29.3	%
Pricing and productivity in excess of inflation	0.5			(0.6	)%
Volume / product mix	14.1			0.8	%
Currency exchange rates	0.2			0.1	%
Investment spending	(1.8		)	(0.4	)%
Acquisitions	2.8			(1.2	)%
Restructuring / acquisition expenses	4.8			1.0	%
September 30, 2018	$	153.8		29.0	%

Operating income increased due to favorable volume/product mix, pricing improvements and productivity in excess of inflation, favorable foreign currency exchange rate movements, acquisitions during the current year, and year over year decreases in restructuring and acquisition expenses. These increases were partially offset by increased investment spending.

Operating margin decreased due to lower pricing improvements and productivity in excess of inflation, increased investment spending and lower margins from acquisitions during the current year. These decreases were partially offset by favorable volume/product mix, favorable foreign currency exchange rate movements, and year over year decreases in restructuring and acquisition expenses.

Segment operating income for the nine months ended September 30, 2018 increased $31.9 million and segment operating margin decreased to 27.8% from 28.8% compared to the same period in 2017 due to the following:

in millions	Operating Income			Operating Margin
September 30, 2017	$	383.6		28.8	%
Pricing and productivity in excess of inflation	2.5			(0.3	)%
Volume / product mix	28.3			0.7	%
Currency exchange rates	1.3			0.1	%
Investment spending	(6.1		)	(0.4	)%
Acquisitions	2.1			(1.4	)%
Restructuring / acquisition expenses	3.8			0.3	%
September 30, 2018	$	415.5		27.8	%

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Operating income increased due to favorable volume/product mix, pricing improvements and productivity in excess of inflation, favorable foreign currency exchange rate movements, acquisitions during the current year, and year over year decreases in restructuring and acquisition costs. These increases were partially offset by increased investment spending.

Operating margin decreased due to lower pricing improvements and productivity in excess of inflation, increased investment spending and lower margins from acquisitions during the current year. These decreases were partially offset by favorable volume/product mix, favorable foreign currency exchange rate movements, and year over year decreases in restructuring and acquisition costs.

EMEIA

Our EMEIA segment provides security products and solutions in approximately 85 countries throughout Europe, the Middle East, India and Africa. The segment offers end-users a broad range of products, services and solutions including, locks, locksets, portable locks, key systems, door closers, exit devices, doors and door systems, electronic product and access control systems, as well as time and attendance and workforce productivity solutions. This segment’s primary brands are AXA, Bricard, CISA, Interflex and SimonsVoss. This segment also resells LCN, Schlage, and Von Duprin products, primarily in the Middle East.

Net Revenues

Net revenues for the three months ended September 30, 2018 increased by 7.4%, or $9.3 million, compared to the same period in 2017 due to the following:

Pricing	1.5	%
Volume	1.9	%
Acquisitions	5.5	%
Currency exchange rates	(1.5	)%
Total	7.4	%

The increase in Net revenues is primarily due to higher volumes, improved pricing and acquisitions in the current year. These increases were partially offset by unfavorable foreign currency exchange rate movements.

Net revenues for the nine months ended September 30, 2018 increased by 16.0%, or $59.8 million, compared to the same period in 2017 due to the following:

Pricing	1.4	%
Volume	2.1	%
Acquisitions	5.6	%
Currency exchange rates	6.9	%
Total	16.0	%

The increase in Net revenues is primarily due to higher volumes, improved pricing, favorable foreign currency exchange rate movements and acquisitions in the current year.

Operating income/margin

Segment operating income for the three months ended September 30, 2018 decreased $1.0 million and segment operating margin decreased to 5.7% from 6.9% compared to the same period in 2017 due to the following:

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in millions	Operating Income			Operating Margin
September 30, 2017	$	8.6		6.9	%
Pricing and productivity in excess of inflation	0.4			0.2	%
Volume / product mix	1.3			0.9	%
Currency exchange rates	0.2			0.3	%
Investment spending	(1.0		)	(0.8	)%
Acquisitions	(0.8		)	(0.9	)%
Restructuring / acquisition expenses	(1.1		)	(0.9	)%
September 30, 2018	$	7.6		5.7	%

The decreases to both Operating income and Operating margin were related to increased investment spending, acquisitions during the current year and year-over-year changes in restructuring and acquisition expenses. These decreases were partially offset by favorable volume/product mix, pricing improvements and productivity in excess of inflation and favorable foreign currency exchange rate movements.

Segment operating income for the nine months ended September 30, 2018 increased $4.2 million and segment operating margin increased to 6.3% from 6.2% compared to the same period in 2017 due to the following:

in millions	Operating Income			Operating Margin
September 30, 2017	$	23.1		6.2	%
Pricing and productivity in excess of inflation	0.3			—	%
Volume / product mix	3.7			0.8	%
Currency exchange rates	3.7			0.5	%
Investment spending	(3.4		)	(0.9	)%
Acquisitions	—			(0.3	)%
Restructuring / acquisition expenses	(0.1		)	—	%
September 30, 2018	$	27.3		6.3	%

Operating income increased due to favorable volume/product mix, pricing improvements and productivity in excess of inflation and favorable foreign currency exchange rate movements. These increases were partially offset by increased investment spending and year-over-year changes in restructuring and acquisition expenses.

Operating margin increased due to favorable volume/product mix and favorable foreign currency exchange rate movements. These increases were partially offset by increased investment spending and lower margins from acquisitions during the current year.

Asia Pacific

Our Asia Pacific segment provides security products and solutions in approximately 15 countries throughout the Asia Pacific region. The segment offers end-users a broad range of products, services and solutions including, locks, locksets, portable locks, key systems, door closers, exit devices, electronic product and access control systems. This segment’s primary brands are Brio, FSH, Gainsborough, Legge, Milre, and Schlage.

Net Revenues

Net revenues for the three months ended September 30, 2018 increased by 61.5%, or $17.9 million, compared to the same period in 2017 due to the following:

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Pricing	0.1	%
Volume	5.8	%
Acquisitions	60.5	%
Currency exchange rates	(4.9	)%
Total	61.5	%

The increase in Net revenues was primarily due to higher volumes, slightly higher pricing and an acquisition during the current year. These increases were partially offset by unfavorable foreign currency exchange rate movements.

Net revenues for the nine months ended September 30, 2018 increased by 24.6%, or $19.9 million, compared to the same period in 2017 due to the following:

Pricing	0.1	%
Volume	2.3	%
Acquisitions	21.7	%
Currency exchange rates	0.5	%
Total	24.6	%

The increase in Net revenues was primarily due to higher volumes, slightly higher pricing, an acquisition during the current year and favorable foreign currency exchange rate movements.

Operating income/margin

Segment operating income for the three months ended September 30, 2018 decreased $0.7 million and segment operating margin decreased to 3.2% from 7.6% compared to the same period in 2017 due to the following:

in millions	Operating Income			Operating Margin
September 30, 2017	$	2.2		7.6	%
Pricing and productivity in excess of inflation	0.4			1.5	%
Volume / product mix	—			(0.6	)%
Currency exchange rates	(0.2		)	(0.4	)%
Investment spending	(0.1		)	(0.4	)%
Acquisitions	0.9			(0.8	)%
Restructuring / acquisition expenses	(1.7		)	(3.7	)%
September 30, 2018	$	1.5		3.2	%

Operating income decreased due to unfavorable foreign currency exchange rate movements, increased investment spending and year over year increases in restructuring and acquisition expenses. These decreases were partially offset by pricing improvements and productivity in excess of inflation and an acquisition during the current year.

Operating margin decreased due to unfavorable volume/product mix, unfavorable foreign currency exchange rate movements, increased investment spending, lower margins from an acquisition during the current year and year over year increases in restructuring and acquisition expenses. These decreases were partially offset by pricing improvements and productivity in excess of inflation.

Segment operating income for the nine months ended September 30, 2018 decreased $4.3 million and segment operating margin decreased to 0.8% from 6.3% compared to the same period in 2017 due to the following:

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in millions	Operating Income			Operating Margin
September 30, 2017	$	5.1		6.3	%
Inflation in excess of pricing and productivity	(0.2		)	(0.3	)%
Volume / product mix	(1.6		)	(2.1	)%
Currency exchange rates	(0.4		)	(0.5	)%
Investment spending	(0.8		)	(1.0	)%
Acquisitions	0.9			(0.2	)%
Restructuring / acquisition expenses	(2.2		)	(1.4	)%
September 30, 2018	$	0.8		0.8	%

Operating income decreased due to inflation in excess of pricing and productivity, unfavorable volume/product mix, unfavorable foreign currency exchange rate movements, increased investment spending and year over year increases in restructuring and acquisition expenses. These decreases were partially offset by an acquisition during the current year.

Operating margin decreased due to inflation in excess of pricing and productivity, unfavorable volume/product mix, unfavorable foreign currency exchange rate movements, increased investment spending, lower margins from an acquisition during the current year and year over year increases in restructuring and acquisition expenses.

Liquidity and Capital Resources

Sources and uses of liquidity

Our primary source of liquidity is cash provided by operating activities. Cash provided by operating activities is used to invest in new product development, fund capital expenditures and fund working capital requirements and is expected to be adequate to service any future debt, pay any declared dividends and potentially fund acquisitions and share repurchases. Our ability to fund these capital needs depends on our ongoing ability to generate cash provided by operating activities, and to access our borrowing facilities (including unused availability under our Revolving Facility) and capital markets. We believe that our future cash provided by operating activities, availability under our Revolving Facility and access to funds on hand and capital markets, will provide adequate resources to fund our operating and financing needs.

The following table reflects the major categories of cash flows for the nine months ended September 30. For additional details, see the Condensed and Consolidated Statements of Cash Flows in the Condensed and Consolidated Financial Statements.

In millions	2018			2017
Net cash provided by operating activities	$	260.4		$	170.0
Net cash used in investing activities	(408.7		)	(36.1		)
Net cash used in financing activities	(116.9		)	(118.7		)

Operating Activities

Net cash provided by operating activities during the nine months ended September 30, 2018 increased $90.4 million compared to the same period in 2017. This increase in net cash provided by operating activities for the nine months ended September 30, 2018 was primarily due to higher Net earnings in the nine months ended September 30, 2018 and a discretionary $50.0 million contribution to the U.S. qualified defined benefit pension plan in 2017, partially offset by changes in working capital.

Investing Activities

Net cash used in investing activities during the nine months ended September 30, 2018 increased $372.6 million compared to the same period in 2017. The increase in net cash used in investing activities is primarily due to approximately $368 million of cash payments related to acquisitions and approximately $8 million of investments in unconsolidated entities during the nine months ended September 30, 2018, compared to just $20.8 million for an acquisition during the same period in 2017. Additionally contributing to the increase in cash used in investing activities was the sale of an equity investment during the nine months ended September 30, 2017, which resulted in an investing cash inflow of $15.5 million that did not recur in the current year.

Financing Activities

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Net cash used in financing activities during the nine months ended September 30, 2018 decreased $1.8 million compared to the same period in 2017. The decrease in cash used in financing activities is primarily due to $30.0 million less used to repurchase shares during the nine months ended September 30, 2018 compared to the same period in 2017. This decrease is partially offset by an increase in dividend payments of $14.0 million during the nine months ended September 30, 2018 compared to the same period in 2017.

Capitalization

Borrowings and current maturities of long-term debt consisted of the following:

In millions	September 30, 2018			December 31, 2017
Term Facility	$	665.0		$	691.3
Revolving Facility	—			—
3.200% Senior Notes due 2024	400.0			400.0
3.550% Senior Notes due 2027	400.0			400.0
Other debt	1.0			1.0
Total borrowings outstanding	1,466.0			1,492.3
Less discounts and debt issuance costs, net	(13.3		)	(15.0		)
Total debt	1,452.7			1,477.3
Less current portion of long-term debt	35.0			35.0
Total long-term debt	$	1,417.7		$	1,442.3

As of September 30, 2018, we have a Credit Agreement in place that provides for up to $1,200.0 million in unsecured financing, consisting of a $700.0 million term loan facility (the “Term Facility”) and a $500.0 million revolving credit facility (the “Revolving Facility” and, together with the Term Facility, the “Credit Facilities”). The Credit Facilities mature on September 12, 2022. The Term Facility amortizes in quarterly installments at the following rates: 1.25% per quarter starting December 31, 2017 through December 31, 2020, 2.5% per quarter from March, 31, 2021 through June 30, 2022, with the balance due on September 12, 2022. The Revolving Facility provides aggregate commitments of up to $500.0 million, which includes up to $100.0 million for the issuance of letters of credit. At September 30, 2018, we had $0.0 million of borrowings outstanding on the Revolving Facility, and we had $17.2 million of letters of credit outstanding.

Outstanding borrowings under the Credit Facilities accrue interest, at our option of (i) a LIBOR rate plus the applicable margin or (ii) a base rate plus the applicable margin. The applicable margin ranges from 1.125% to 1.500% depending on our credit ratings. To manage our exposure to fluctuations in LIBOR rates, we have interest rate swaps to fix the interest rate for $250.0 million of the outstanding borrowings (see Note 8).

As of September 30, 2018, we also have $400.0 million outstanding of 3.200% Senior Notes due 2024 (the “3.200% Senior Notes”) and $400.0 million outstanding of 3.550% Senior Notes due 2027 (the “3.550% Senior Notes” and, together with the 3.200% Senior Notes, the “Notes”). The Notes require semi-annual interest payments on April 1 and October 1 of each year, and will mature on October 1, 2024 and October 1, 2027, respectively.

Historically, the majority of our earnings were considered to be permanently reinvested in jurisdictions where we have made, and intend to continue to make, substantial investments to support the ongoing development and growth of our global operations. We are currently analyzing our global working capital requirements and the potential tax liabilities that would be incurred if certain non-U.S. subsidiaries made distributions, which include local country withholding tax and potential U.S. state taxation.

Pension Plans

Our investment objective in managing defined benefit plan assets is to ensure that all present and future benefit obligations are met as they come due. We seek to achieve this goal while trying to mitigate volatility in plan funded status, contribution and expense by better matching the characteristics of the plan assets to that of the plan liabilities. Global asset allocation decisions are based on a dynamic approach whereby a plan's allocation to fixed income assets increases as the funded status increases. We monitor plan funded status, asset allocation, and the impact of market conditions on our defined benefit plans regularly in addition to investment manager performance. For further details on pension plan activity, see Note 9 to the Condensed and Consolidated Financial Statements.

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For a further discussion of Liquidity and Capital Resources, refer to Part II, Item 7, "Management’s Discussion and Analysis of Financial Condition and Results of Operations," contained in our Annual Report on Form 10-K for the year ended December 31, 2017.

Critical Accounting Policies

Management’s Discussion and Analysis of Financial Condition and Results of Operations are based upon our Condensed and Consolidated Financial Statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of financial statements in conformity with those accounting principles requires management to use judgments in making estimates and assumptions based on the relevant information available at the end of each period. These estimates and assumptions have a significant effect on reported amounts of assets and liabilities, revenue and expenses, as well as the disclosure of contingent assets and liabilities because they result primarily from the need to make estimates and assumptions on matters that are inherently uncertain. Actual results may differ from estimates.

Management believes there have been no significant changes during the nine months ended September 30, 2018, to the items that we disclosed as our critical accounting policies in "Management’s Discussion and Analysis of Financial Condition and Results of Operations" in our Annual Report on Form 10-K for the year ended December 31, 2017.

Recent Accounting Pronouncements

See Note 2 to our Condensed and Consolidated Financial Statements for a discussion of recently issued and adopted accounting pronouncements.

Forward-Looking Statements

Certain statements in this report, other than purely historical information, are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These forward-looking statements generally are identified by the words “believe,” “project,” “expect,” “anticipate,” “estimate,” “forecast,” “outlook,” “intend,” “strategy,” “future,” “opportunity,” “plan,” “may,” “should,” “will,” “would,” “will be,” “will continue,” “will likely result,” or the negative thereof or variations thereon or similar terminology generally intended to identify forward-looking statements.

Forward-looking statements may relate to such matters as projections of revenue, margins, expenses, tax provisions, earnings, cash flows, benefit obligations, dividends, share purchases or other financial items; any statements of the plans, strategies and objectives of management for future operations, including those relating to any statements concerning expected development, performance or market share relating to our products and services; any statements regarding future economic conditions or our performance; any statements regarding pending investigations, claims or disputes; any statements of expectation or belief; and any statements of assumptions underlying any of the foregoing. These statements are based on currently available information and our current assumptions, expectations and projections about future events. While we believe that our assumptions, expectations and projections are reasonable in view of the currently available information, you are cautioned not to place undue reliance on our forward-looking statements. You are advised to review any further disclosures we make on related subjects in materials we file with or furnish to the SEC. Forward-looking statements speak only as of the date they are made and are not guarantees of future performance. They are subject to future events, risks and uncertainties - many of which are beyond our control - as well as potentially inaccurate assumptions, that could cause actual results to differ materially from those in our forward looking statements. We do not undertake to update any forward-looking statements.

Factors that might affect our forward-looking statements include, among other things:

• economic, political and business conditions in the markets in which we operate;

• the demand for our products and services;

• competitive factors in the industry in which we compete;

• the ability to protect and use intellectual property;

• emerging products and services introduced by competitors and their adoption by our customers;

• fluctuations in currency exchange rates;

• the ability to complete and integrate any acquisitions;

• our ability to operate efficiently and productively;

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• our ability to manage risks related to our information technology and cyber-security;

• changes in tax requirements (including tax rate changes, new tax laws and revised tax law interpretations);

• the outcome of any litigation, governmental investigations or proceedings;

• interest rate fluctuations and other changes in borrowing costs;

• other capital market conditions, including availability of funding sources and currency exchange rate fluctuations;

• availability of and fluctuations in the prices of key commodities and the impact of higher energy prices;

• potential further impairment of our goodwill, indefinite-lived intangible assets and/or our long-lived assets;

• the possible effects on us of future legislation or interpretations in the U.S. that may limit or eliminate potential U.S. tax benefits resulting from our incorporation in a non-U.S. jurisdiction, such as Ireland, or deny U.S. government contracts to us based upon our incorporation in such non-U.S. jurisdiction; and

• the impact our outstanding indebtedness may have on our business and operations.

Some of the significant risks and uncertainties that could cause actual results to differ materially from our expectations and projections are described more fully in the “Risk Factors” section of this Quarterly Report on Form 10-Q and our Annual Report on Form 10-K for the fiscal year ended December 31, 2017. There may also be other factors that have not been anticipated or that are not described in our periodic filings with the SEC, generally because we did not believe them to be significant at the time, which could cause results to differ materially from our expectations.

Item 3 – Quantitative and Qualitative Disclosures about Market Risk

There have been no material changes in our exposure to market risk during the third quarter of 2018. For a discussion of the Company’s exposure to market risk, refer to Part II, Item 7A, “Quantitative and Qualitative Disclosures About Market Risk,” contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

Item 4 – Controls and Procedures

The Company’s management, including its Chief Executive Officer and Chief Financial Officer, have conducted an evaluation of the effectiveness of disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the Exchange Act)), as of the end of the period covered by this Quarterly Report on Form 10-Q. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded as of September 30, 2018, that the disclosure controls and procedures are effective in ensuring that all material information required to be filed in this Quarterly Report on Form 10-Q has been recorded, processed, summarized and reported when required and the information is accumulated and communicated to the Company's management, including its Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

There has been no change in the Company’s internal control over financial reporting that occurred during the third quarter of 2018 that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

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PART II – OTHER INFORMATION

Item 1 – Legal Proceedings

In the normal course of business, we are involved in a variety of lawsuits, claims and legal proceedings, including commercial and contract disputes, labor and employment matters, product liability claims, environmental liabilities, intellectual property disputes and tax-related matters. In our opinion, pending legal matters are not expected to have a material adverse impact on our results of operations, financial condition, liquidity or cash flows.

Item 1A – Risk Factors

There have been no material changes to our risk factors contained in our Annual Report on Form 10-K for the period ended December 31, 2017. For a further discussion of our Risk Factors, refer to the “Risk Factors” discussion contained in our Annual Report on Form 10-K for the year ended December 31, 2017.

Item 2 - Unregistered Sales of Equity Securities and Use of Proceeds

Issuer Purchases of Equity Securities

Period	Total number of shares purchased (000s)	Average price paid per share	Total number of shares purchased as part of program (000s)	Approximate dollar value of shares still available to be purchased under the program (000s)
July 1 - July 31	—	—	—	$	409,999
August 1 - August 31	—	—	—	409,999
September 1 - September 30	—	—	—	409,999
Total	—	—	—	$	409,999

In February 2017, our Board of Directors approved a stock repurchase authorization of up to $500 million of the Company's ordinary shares (the "2017 Share Repurchase Authorization"). Based on market conditions, share repurchases are made from time to time in the open market at the discretion of management. The 2017 Share Repurchase Authorization does not have a prescribed expiration date.

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Item 6 – Exhibits

(a) Exhibits

Exhibit No.	Description	Method of Filing
3.1	Amended and restated Memorandum of Association of Allegion plc (as amended by special resolution on June 8, 2016).	Incorporated by reference to Exhibit 3.1 to the Company's Form 8-K filed with the SEC on June 13, 2016 (File No. 001-35971).
3.2	Amended and restated Articles of Association of Allegion plc (as amended by special resolution on June 8, 2016).	Incorporated by reference to Exhibit 3.1 to the Company's Form 8-K filed with the SEC on June 13 2016 (File No. 001-35971).
12.1	Ratio of Earnings to Fixed Charges.	Filed herewith.
31.1	Certification of Chief Executive Officer Pursuant to Rule 13a-14(a) or Rule 15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.	Filed herewith.
31.2	Certification of Chief Financial Officer Pursuant to Rule 13a-14(a) or Rule 15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.	Filed herewith.
32.1	Certifications of Chief Executive Officer and Chief Financial Officer Pursuant to Rule 13a-14(b) or Rule 15d-14(b) and 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.	Furnished herewith.
101	The following materials from the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2018, formatted in XBRL (Extensible Business Reporting Language): (i) the Condensed and Consolidated Statements of Comprehensive Income, (ii) the Condensed and Consolidated Balance Sheets, (iii) the Condensed and Consolidated Statement of Cash Flows, and (iv) Notes to Condensed and Consolidated Financial Statements.	Filed herewith.

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ALLEGION PLC

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		ALLEGION PLC (Registrant)
Date:	October 25, 2018	/s/ Patrick S. Shannon
		Patrick S. Shannon, Senior Vice President and Chief Financial Officer Principal Financial Officer
Date:	October 25, 2018	/s/ Douglas P. Ranck
		Douglas P. Ranck, Vice President, Controller and Chief Accounting Officer Principal Accounting Officer

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EX-12.1

Exhibit 12.1

Allegion plc

RATIO OF EARNINGS TO FIXED CHARGES

	Nine months ended September 30,				Year Ended December 31,
	2018		2017		2017		2016		2015		2014		2013
Earnings from continuing operations
before income taxes	$	348.0	$	317.7	$	395.7	291.3		$	209.5	$	267.4	$	223.4
Fixed charges	50.9		58.5		117.5		75.1		63.6		60.1		22.0
Total earnings	$	398.9	$	376.2	$	513.2	$	366.4	$	273.1	$	327.5	$	245.4
Fixed charges:
Interest expense*	$	40.3	$	49.7	$	105.7	$	64.3	$	52.9	$	49.3	$	10.2
Rentals (one-third of rentals)	10.6		8.8		11.8		10.8		10.7		10.8		11.8
Total fixed charges	$	50.9	$	58.5	$	117.5	$	75.1	$	63.6	$	60.1	$	22.0
Ratio of earnings to fixed charges	7.8		6.4		4.4		4.9		4.3		5.4		11.2

* Includes interest expense on all third-party indebtedness, and excludes interest related to unrecognized tax positions, which is reported as income tax expense.

The ratio of earnings to fixed charges was computed by dividing earnings by fixed charges for the periods indicated where earnings consists of (1) earnings from continuing operations before income taxes plus (2) fixed charges. Fixed charges consist of (a) interest on all indebtedness, (b) amortization of premiums, discounts and capitalized expenses related to indebtedness and (c) an interest component representing the estimated portion of rental expense that management believes is attributable to interest.

EX-31.1

Exhibit 31.1

CERTIFICATION

I, David D. Petratis, certify that:

1. I have reviewed the Quarterly Report on Form 10-Q of Allegion plc for the three and nine months ended September 30, 2018;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	October 25, 2018	/s/ David D. Petratis
		David D. Petratis
		Principal Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Patrick S. Shannon, certify that:

1. I have reviewed the Quarterly Report on Form 10-Q of Allegion plc for the three and nine months ended September 30, 2018;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	October 25, 2018	/s/ Patrick S. Shannon
		Patrick S. Shannon
		Principal Financial Officer

EX-32.1

Exhibit 32.1

Section 1350 Certifications

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code), each of the undersigned officers of Allegion plc (the Company), does hereby certify that:

The Quarterly Report on Form 10-Q for the three and nine months ended September 30, 2018 (the Form 10-Q) of the Company fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ David D. Petratis

David D. Petratis

Principal Executive Officer

October 25, 2018

/s/ Patrick S. Shannon

Patrick S. Shannon

Principal Financial Officer

October 25, 2018

XML

Document and Entity Information Document - shares	9 Months Ended
	Sep. 30, 2018	Oct. 22, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	Allegion plc
Entity Central Index Key	0001579241
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		95,055,763

XML

Condensed Consolidated Statements of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net revenues	$ 711.5	$ 609.4	$ 2,029.3	$ 1,785.1
Cost of goods sold	(402.1)	(335.0)	(1,156.5)	(988.2)
Selling and administrative expenses	(167.1)	(147.3)	(488.4)	(435.3)
Operating income	142.3	127.1	384.4	361.6
Interest expense	(14.0)	(17.8)	(40.3)	(49.7)
Other income, net	(1.9)	(2.7)	(3.9)	(5.6)
Earnings before income taxes	130.2	112.0	348.0	317.5
Provision for income taxes	(14.1)	(21.9)	(45.5)	(52.9)
Net earnings	116.1	90.1	302.5	264.6
Less: Net earnings attributable to noncontrolling interests	(0.1)	(0.3)	(0.4)	(0.9)
Net earnings attributable to Allegion plc	$ 116.0	$ 89.8	$ 302.1	$ 263.7
Earnings per share attributable to Allegion plc ordinary shareholders:
Basic net earnings	$ 1.22	$ 0.95	$ 3.18	$ 2.77
Diluted net earnings	$ 1.21	$ 0.94	$ 3.15	$ 2.75
Weighted-average shares outstanding
Basic	95.1	95.0	95.1	95.2
Diluted	95.8	95.8	95.8	96.0
Dividends declared per ordinary share	$ 0.21	$ 0.16	$ 0.63	$ 0.48
Total comprehensive income	$ 103.3	$ 112.7	$ 265.3	$ 347.5
Less: Total comprehensive (loss) income attributable to noncontrolling interests	(0.6)	0.8	(1.6)	2.0
Total comprehensive income attributable to Allegion plc	$ 103.9	$ 111.9	$ 266.9	$ 345.5

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 189.7	$ 466.2
Restricted Cash, Current	6.8	0.0
Accounts and notes receivable, net	361.4	296.6
Inventories	278.3	239.8
Other current assets	37.1	30.1
Total current assets	873.3	1,032.7
Property, plant and equipment, net	273.3	252.2
Goodwill	878.0	761.2
Intangible assets, net	558.4	394.3
Other noncurrent assets	147.1	101.6
Total assets	2,730.1	2,542.0
LIABILITIES AND EQUITY
Accounts payable	208.0	188.3
Accrued expenses and other current liabilities	243.9	237.5
Short-term borrowings and current maturities of long-term debt	35.0	35.0
Total current liabilities	486.9	460.8
Long-term debt	1,417.7	1,442.3
Other noncurrent liabilities	226.5	233.4
Total liabilities	2,131.1	2,136.5
Equity:
Ordinary shares, $0.01 par value (95,051,627 and 95,062,385 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively)	1.0	1.0
Capital in excess of par value	12.2	9.1
Retained earnings	771.9	544.4
Accumulated other comprehensive loss	(188.2)	(152.9)
Total Allegion plc shareholders’ equity	596.9	401.6
Noncontrolling interests	2.1	3.9
Total equity	599.0	405.5
Total liabilities and equity	$ 2,730.1	$ 2,542.0

XML

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net earnings	$ 302.5	$ 264.6
Adjustments to arrive at net cash provided by operating activities:
Depreciation and amortization	65.8	49.9
Discretionary pension plan contribution	0.0	(50.0)
Changes in assets and liabilities and other non-cash items	(107.9)	(94.5)
Net cash provided by operating activities	260.4	170.0
Cash flows from investing activities:
Capital expenditures	(31.8)	(33.7)
Acquisition of and equity investments in businesses, net of cash acquired	(375.8)	(20.8)
Proceeds from sale of equity investment	0.0	15.5
Other investing activities, net	(1.1)	2.9
Net cash used in investing activities	(408.7)	(36.1)
Cash flows from financing activities:
Short-term borrowings, net	(0.7)	(1.3)
Proceeds from revolving facility	115.0	165.0
Repayments of revolving facility	115.0	0.0
Issuance of term facility	0.0	700.0
Settlement of second amended credit facility	0.0	(856.3)
Payments of other long-term debt	(26.7)	(23.5)
Debt repayments, net	(27.4)	(16.1)
Payments of Debt Issuance Costs	0.0	3.0
Dividends paid to ordinary shareholders	(59.6)	(45.6)
Repurchase of ordinary shares	(30.0)	(60.0)
Other financing activities, net	0.1	6.0
Net cash used in financing activities	(116.9)	(118.7)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(4.5)	7.3
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(269.7)	22.5
Cash, cash equivalents, and restricted cash - beginning of period	466.2	312.4
Cash, cash equivalents, and restricted cash - end of period	$ 196.5	$ 334.9

XML

Basis of Presentation

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying Condensed and Consolidated Financial Statements of Allegion plc, an Irish public limited company, and its consolidated subsidiaries ("Allegion" or the "Company"), reflect the consolidated operations of the Company and have been prepared in accordance with United States Securities and Exchange Commission ("SEC") interim reporting requirements. Accordingly, the accompanying Condensed and Consolidated Financial Statements do not include all disclosures required by accounting principles generally accepted in the United States of America ("GAAP") for full financial statements and should be read in conjunction with the consolidated financial statements included in the Allegion Annual Report on Form 10-K for the year ended December 31, 2017. In the opinion of management, the accompanying Condensed and Consolidated Financial Statements contain all adjustments, which include normal recurring adjustments, necessary to state fairly the consolidated unaudited results for the interim periods presented.

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Recent Accounting Pronouncements

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Recently Adopted Accounting Pronouncements:

In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers" (ASC 606). ASC 606 is a single, comprehensive revenue recognition model for all contracts with customers. The model is based on changes in contract assets (rights to receive consideration) and liabilities (obligations to provide a good or perform a service). Revenue is recognized based on the satisfaction of performance obligations, which occurs when control of a good or service transfers to a customer. ASC 606

contains expanded disclosure requirements relating to the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. ASC 606 allows entities to adopt the standard on either a full retrospective approach or report the cumulative effect as of the date of adoption ("modified retrospective method"). The FASB has also issued the following standards which clarify ASU 2014-09: ASU 2017-14, Revenue Recognition, Revenue from Contracts with Customers: Amendments to SEC Paragraphs Pursuant to Staff Accounting Bulletin No. 116 and SEC Release No. 33-10403, ASU 2017-13, Revenue Recognition, Revenue from Contracts with Customers: Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Rescission of Prior SEC Staff Announcements and Observer Comments, ASU 2016-20, Revenue from Contracts with Customers: Technical Corrections and Improvements, ASU 2016-12, Revenue from Contracts with Customers: Narrow-Scope Improvements and Practical Expedients and ASU 2016-10, Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing. The Company adopted each of these standards on January 1, 2018 on a modified retrospective basis. The impact of adopting the new standards was not material to the Company’s Condensed and Consolidated Financial Statements at January 1, 2018 or for the three or nine months ended September 30, 2018, and no cumulative effect adjustment was recorded to opening retained earnings. Expanded disclosure as required by the new standards is presented within Note 17 to the Condensed and Consolidated Financial Statements.

In August 2016, the FASB issued ASU 2016-15, "Statement of Cash Flows (Topic 230): Clarification of Certain Cash Receipts and Cash Payments." ASU 2016-15 eliminates the diversity in practice related to the classification of certain cash receipts and payments in the statement of cash flows, by adding or clarifying guidance on eight specific cash flow issues. The ASU is effective for annual and interim reporting periods beginning after December 15, 2017, and as such, the Company adopted ASU 2016-15 on January 1, 2018. The amendments in this update are required to be applied retrospectively to all periods presented. The adoption of ASU 2016-15 did not have a material impact on the Condensed and Consolidated Financial Statements.

In January 2017, the FASB issued ASU 2017-01, "Business Combinations (Topic 805): Clarifying the Definition of a Business." This update provides guidance to assist companies in evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The update provides a more robust framework to use in determining when a set of transferred assets and activities is a business. This ASU is effective for annual and interim reporting periods beginning after December 15, 2017, and requires prospective adoption. The Company adopted ASU 2017-01 on January 1, 2018. The adoption of ASU 2017-01 did not have a material impact on the Condensed and Consolidated Financial Statements.

In March 2017, the FASB issued ASU 2017-07, "Compensation—Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost." ASU 2017-07 requires that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the statement of comprehensive income separately from the service cost component and outside a subtotal of operating income. ASU 2017-07 also allows only the service cost component to be eligible for capitalization when applicable (for example, as a cost of internally manufactured inventory or a self-constructed asset). The ASU is effective for annual periods beginning after December 15, 2017, and as such, the Company adopted ASU 2017-07 on January 1, 2018. The Company has applied ASU 2017-07 retrospectively for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the Condensed and Consolidated Statements of Comprehensive Income and prospectively for the capitalization of the service cost component of net periodic pension cost and net periodic postretirement benefit in assets. The adoption of ASU 2017-07 did not have a material impact on the Condensed and Consolidated Financial Statements.

In August 2017, the FASB issued ASU 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities." ASU 2017-12 addresses previous limitations on how an entity can designate the hedged risk in certain cash flow and fair value hedging relationships by expanding and refining hedge accounting for both nonfinancial and financial risk components and aligning the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. The ASU is effective for annual periods beginning after December 15, 2018, with early adoption permitted. The Company elected to early adopt the provisions of ASU 2017-12 on January 1, 2018. The amendments in this update have been applied to hedging relationships existing on the date of adoption. The adoption of ASU 2017-12 did not have a material impact on the Condensed and Consolidated Financial Statements.

In March 2018, the FASB issued ASU 2018-05, "Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118". The overarching purpose of ASU 2018-05 is to codify the guidance issued by the SEC related to income tax accounting implications due to the comprehensive U.S. tax legislation commonly referred to as the Tax Cuts and Jobs Act enacted on December 22, 2017 (the "Tax Reform Act"), as originally discussed within Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (SAB 118) within ASC 740, Income Taxes. SAB 118, and now ASC 740 provide a measurement period, which in no case should extend beyond one year from the Tax Reform Act enactment date, during which a company acting in good faith may complete the accounting for the impacts of the Tax Reform Act. To the extent that a company’s accounting for certain income tax effects of the Tax Reform Act is incomplete, the company can determine a reasonable estimate for those effects and record a provisional estimate in the financial statements in the first reporting period in which a reasonable estimate can be determined. If a company cannot determine a provisional estimate to be included in the financial statements, the company should continue to apply ASC 740 based on the provisions of the tax laws that were in effect immediately prior to the Tax Reform Act being enacted. At December 31, 2017, the Company recorded a provisional valuation allowance related to interest limitation carryforwards and other adjustments to the net deferred tax assets, with a corresponding discrete net tax charge of $22.8 million. On April 2, 2018, IRS Notice 2018-28 was issued to provide guidance to assist taxpayers in complying with providing transition guidance related to interest limitation carryforwards recorded at the enactment date. Management is in process of evaluating IRS Notice 2018-28 and assessing its impact on the provisional valuation allowance recorded at December 31, 2017. During the three-month period ended September 30, 2018, an adjustment resulting in a $3.3 million tax benefit was made to the provisional amounts previously recognized related to the Tax Reform Act, primarily relating to clarified guidance received during the quarter around the deductibility of certain executive compensation. The Company will continue to analyze impacts from the enactment of the Tax Reform Act on its Condensed and Consolidated Financial Statements, and any additional impacts will be recorded as they are identified during the measurement period as provided for in SAB 118, which extends up to one year from the enactment date.

Recently Issued Accounting Pronouncements

In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)." ASU 2016-02 requires the identification of arrangements that should be accounted for as leases by lessees. In general, for lease arrangements exceeding a twelve month term, these arrangements will be recognized as assets and liabilities on the balance sheet of the lessee. Under ASU 2016-02, a right-of-use asset and lease obligation will be recorded for all leases, whether operating or financing, while the income statement will reflect lease expense for operating leases and amortization/interest expense for financing leases. In July 2018, the FASB issued ASU 2018-10, "Codification Improvements to Topic 842 (Leases)", which provides narrow amendments to clarify how to apply certain aspects of ASU 2016-02, and ASU 2018-11, "Leases (Topic 842): Targeted Improvements", which provides adopters an additional transition method by allowing entities to initially apply ASU 2016-02, and subsequent related standards, at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. These ASUs are effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods. Early adoption is permitted. The Company is in the process of updating its systems, policies, and internal controls over financial reporting in anticipation of adopting these standards on January 1, 2019. The Company will utilize the new cumulative-effect adjustment transition method allowed per ASU 2018-11. The Company also currently anticipates electing the following practical expedients available within these standards:

• The Company will elect to not separate non-lease components from lease components and instead to account for each separate lease component and the non-lease components associated with that lease component as a single lease component.

• If at the lease commencement date a lease has a lease term of 12 months or less and does not include a purchase option that is reasonably certain to exercise, the Company will elect not to apply ASC 842 recognition requirements. Nonetheless, the Company intends to include leases of less than 12 months within the updated footnote disclosures.

• If the Company enters into a large number of leases in the same month with the same terms and conditions, these will be looked at as a group (portfolio) assuming the lease model under this approach will not materially differ from applying to each individual lease.

• If available, the rate implicit in the lease will be used as the discount rate. However, if this is not available, the Company will use it's incremental borrowing rate as the discount rate, defined as the weighted average rate of total outstanding debt, gross of any hedging contracts.

• As the Company will apply the new transition method allowed per ASU 2018-11, the Company will elect to not reassess arrangements entered into prior than January 1, 2019 for whether an arrangement is or contains a lease, the lease classification applied, or to separate initial direct costs.

The Company is continuing to assess what the complete impact these ASUs and the related practical expedients will have on the Condensed and Consolidated Financial Statements; however, the Company anticipates that adoption will result in the recognition of a significant right-of-use asset and lease liability on its Condensed and Consolidated Balance Sheets. Changes to processes and internal controls to meet the new standards' reporting and disclosure requirements have been identified and are being implemented. Software has been implemented that will assist in the recognition of the right-to-use asset and lease liability to be included on the Condensed and Consolidated Balance Sheets related to leases currently classified as operating leases with durations greater than twelve months, with certain allowable exceptions. The Company is in the process of reviewing its lease portfolio, as well as other agreements not currently classified as leases, for embedded leases and to ensure appropriate classification and disclosure under the new standards.

In June 2016, the FASB issued ASU 2016-13, "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." The new guidance introduces an approach based on expected losses to estimate credit losses on certain types of financial instruments. The ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. The Company is assessing what impact ASU 2016-13 will have on the Condensed and Consolidated Financial Statements.

In February 2018, the FASB issued ASU 2018-02, "Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." The new guidance permits entities to reclassify tax effects stranded in accumulated other comprehensive income (AOCI) as a result of the Tax Reform Act. ASU 2018-02 provides this option not only for the impact to deferred tax assets and liabilities due to the reduction in the U.S. tax rate, but also for tax effects stranded in AOCI for other reasons specific to the Tax Reform Act, such as state taxes or transitioning to a territorial tax system. Tax effects that are stranded in AOCI for reasons not relating to the Tax Reform Act may not be reclassified under ASU 2018-02. This ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. Entities that adopt the ASU in an annual or interim period after the period of enactment are able to choose whether to apply the amendments retrospectively to each period in which the effect of the Tax Reform Act is recognized or to apply the amendments in the period of adoption. The Company is assessing what impact ASU 2018-02 will have on the Condensed and Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-13, "Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement." The new guidance modifies the disclosure requirements related to fair value measurements in Topic 820, Fair Value Measurement, including removing certain previous disclosure requirements, adding certain new disclosure requirements, and modifying certain other disclosure requirements. The ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. The Company elected to early adopt ASU 2018-13 on October 1, 2018. The adoption is not expected to have a material impact on the Condensed and Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-14, "Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans." The new guidance modifies the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans, including removing certain previous disclosure requirements, adding certain new disclosure requirements, and clarifying certain other disclosure requirements. The ASU will be effective for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. Early adoption is permitted. The Company elected to early adopt ASU 2018-14 on October 1, 2018. The adoption is not expected to have a material impact on the Condensed and Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-15, "Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract." The new guidance aligns the requirements for capitalizing implementation costs incurred in a cloud-based hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. The Company is assessing what impact ASU 2018-15 will have on the Condensed and Consolidated Financial Statements.

XML

Inventories

9 Months Ended

Sep. 30, 2018

Inventory, Net [Abstract]

Inventories

Inventories

Inventories are stated at the lower of cost and net realizable value using the first-in first-out (FIFO) method.

The major classes of inventory were as follows:

In millions	September 30, 2018		December 31, 2017
Raw materials	$	60.5	$	66.6
Work-in-process	25.7		29.8
Finished goods	192.1		143.4
Total	$	278.3	$	239.8

XML

Goodwill

9 Months Ended

Sep. 30, 2018

Goodwill Disclosure [Abstract]

Goodwill

Goodwill

The changes in the carrying amount of goodwill for the nine months ended September 30, 2018 were as follows:

In millions	Americas		EMEIA			Asia Pacific			Total
December 31, 2017 (gross)	$	375.2	$	769.8		$	101.7		$	1,246.7
Accumulated impairment	—		(478.6		)	(6.9		)	(485.5		)
December 31, 2017 (net)	375.2		291.2			94.8			761.2
Acquisitions	107.5		9.2			15.8			132.5
Currency translation	0.2		(9.6		)	(6.3		)	(15.7		)
September 30, 2018 (net)	$	482.9	$	290.8		$	104.3		$	878.0

XML

Intangible Assets

9 Months Ended

Sep. 30, 2018

Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

The gross amount of the Company’s intangible assets and related accumulated amortization were as follows:

	September 30, 2018							December 31, 2017
In millions	Gross carrying amount		Accumulated amortization			Net carrying amount		Gross carrying amount		Accumulated amortization			Net carrying amount
Completed technologies/patents	$	59.0	$	(13.1	)	$	45.9	$	32.6	$	(10.0	)	$	22.6
Customer relationships	423.6		(84.5		)	339.1		324.5		(74.1		)	250.4
Trade names (finite-lived)	87.9		(47.1		)	40.8		89.0		(46.1		)	42.9
Other	9.1		(6.1		)	3.0		7.9		(4.9		)	3.0
Total finite-lived intangible assets	579.6		$	(150.8	)	428.8		454.0		$	(135.1	)	318.9
Trade names (indefinite-lived)	129.6					129.6		75.4					75.4
Total	$	709.2				$	558.4	$	529.4				$	394.3

Intangible asset amortization expense was $28.6 million and $16.4 million for the nine months ended September 30, 2018 and 2017, respectively. Future estimated amortization expense on existing intangible assets in each of the next five years amounts to approximately $34.4 million for full year 2018, $28.7 million for 2019, $28.7 million for 2020, $28.7 million for 2021, and $28.7 million for 2022.

XML

Acquisition

9 Months Ended

Sep. 30, 2018

Business Combinations [Abstract]

Acquisitions

Acquisitions and Investments in Unconsolidated Entities

2018

During the nine months ended September 30, 2018, the Company completed six acquisitions:

Business	Date
Technical Glass Products, Inc. ("TGP")	January 2018
Hammond Enterprises, Inc. ("Hammond")	January 2018
Qatar Metal Industries LLC ("QMI")	February 2018
AD Systems, Inc. ("AD Systems")	March 2018
Gainsborough Hardware and API Locksmiths ("Door and Access Systems")	July 2018
ISONAS Security Systems, Inc. ("ISONAS")	July 2018

In January 2018, the Company acquired 100% of TGP through one of its subsidiaries. TGP provides fire-rated architectural glass and framing solutions for commercial buildings, as well as non-fire rated architectural glass and framing, including channel glass systems and curtain walls throughout the United States, Canada, and select markets in the Middle East. TGP has been integrated into the Company's Americas and EMEIA segments.

In January 2018, the Company acquired 100% of the machinery, equipment, and intellectual property of a division of Hammond through one of its subsidiaries. The assets acquired have been integrated into the Company's existing production facilities and are specific to the Company's Schlage-branded products.

In February 2018, the Company acquired 100% of QMI through one of its subsidiaries. QMI specializes in fire rated and non-fire rated steel and wooden doors, acoustic doors, and wooden cabinets, as well as fire rated curtain wall systems and access panels in Qatar, Saudi Arabia, Bahrain, Oman, Kuwait, the United Arab Emirates, and Africa. QMI has been integrated into the Company's EMEIA segment.

In March 2018, the Company acquired 100% of AD Systems through one of its subsidiaries. AD Systems designs and manufactures high-performance interior and storefront door systems, specializing in sliding and acoustic solutions. AD Systems' portfolio includes sliding and swinging doors, perimeter frames, door hardware, gasketing, seals and sidelite panels. AD Systems has been integrated into the Company's Americas segment.

In July 2018, the Company acquired Door and Access Systems, based in Australia, through one of its subsidiaries. This business includes the brands Gainsborough Hardware, the market-leading residential door hardware brand in Australia, and API Locksmiths, which serves the Australian market with its keying, installation and access control services. Door and Access Systems has been integrated into the Company's Asia Pacific segment.

In July 2018, the Company acquired 100% of ISONAS through one of its subsidiaries. ISONAS designs and manufactures edge-computing technology that produces Power over Ethernet access control solutions for non-residential end-markets. ISONAS has been integrated into the Company's Americas segment.

Total consideration paid for these six acquisitions to date was approximately $368 million (net of cash acquired). The Company estimates the fair value of future consideration to be paid, including contingent consideration, to be approximately $6 million. Cash on hand and $75 million of borrowings on the Revolving Facility in July, which has since been repaid, were utilized to fund these acquisitions. The preliminary allocation of the aggregate purchase price to assets acquired and liabilities assumed for the acquisitions described above is as follows:

In millions
Accounts receivable, net	$	29.8
Inventories	28.7
Other current assets	1.3
Property, plant and equipment, net	27.6
Goodwill	132.5
Intangible assets, net	204.3
Other noncurrent assets	0.9
Accounts payable	(11.1		)
Accrued expenses and other current liabilities	(35.2		)
Other noncurrent liabilities	(4.7		)
Total consideration	$	374.1

Intangible assets are primarily comprised of approximately $59 million of indefinite-lived trade names, $112 million of customer relationships, and $33 million of completed technologies and other intangibles, which includes approximately $6 million of acquired backlog revenue. The customer relationships have a 17-year weighted average useful life, while the completed technologies and other intangibles, excluding the backlog revenue, have a 16-year weighted average useful life. The backlog revenue was fully amortized as of June 30, 2018.

Goodwill results from several factors including Allegion-specific synergies that were excluded from the cash flow projections used in the valuation of intangible assets and intangible assets that do not qualify for separate recognition, for example, assembled workforce. The majority of the goodwill is expected to be deductible for tax purposes. The preliminary purchase price allocations for the acquisitions are pending completion of valuations. These acquisitions are accounted for as business combinations.

The following unaudited pro forma financial information for the three and nine months ended September 30, 2018 and 2017 reflects the consolidated results of operations of the Company as if these acquisitions had taken place on January 1, 2017:

	Three months ended				Nine months ended
In millions, except per share amounts	2018		2017		2018		2017
Net revenues	$	711.5	$	663.6	$	2,071.8	$	1,939.3
Net earnings attributable to Allegion plc	$	119.3	$	93.4	$	313.1	$	263.2
Basic net earnings per share	$	1.25	$	0.98	$	3.29	$	2.76
Diluted net earnings per share	$	1.25	$	0.97	$	3.27	$	2.74

The unaudited pro forma financial information is presented for informational purposes only and does not purport to be indicative of results of operations that would have occurred had the pro forma events taken place on the date indicated or the future consolidated results of operations of the combined company. The unaudited pro forma financial information has been calculated after applying the Company's accounting policies and adjusting the historical financial results to reflect additional items directly attributable to the acquisitions that would have been incurred assuming the acquisitions had occurred on January 1, 2017. Adjustments to historical financial information include additional amortization of approximately $1.5 million (net of tax) and $8.3 million (net of tax) included in the three and nine months ended September 30, 2017, respectively, in the pro forma table above. Approximately $3.9 million (net of tax) of the additional amortization included in the nine months ended September 30, 2017 relates to backlog revenue acquired by the Company, which is recorded in Cost of goods sold.

The following financial information reflects Net revenues and Earnings before income taxes of the acquisitions for the three and nine months ended September 30, 2018 since their respective acquisition dates included in the Condensed and Consolidated Statement of Comprehensive Income:

In millions	Three months ended September 30, 2018		Nine months ended September 30, 2018
Net revenues	$	55.0	$	115.0
Earnings before income taxes	$	0.9	$	(0.7	)

During the three months ended September 30, 2018 and 2017, the Company incurred $4.1 million and $1.2 million, respectively, of acquisition and integration related exenses. During the nine months ended September 30, 2018 and 2017, the Company incurred $8.6 million and $2.4 million, respectively, of acquisition and integration related expenses. These expenses are included in Selling and administrative expenses in the Condensed and Consolidated Statements of Comprehensive Income.

During the nine months ended September 30, 2018, the Company also made $8 million of investments in three unconsolidated entities, Yonomi Inc., a U.S. based mobile application and cloud platform provider for connected living, Nuki GmbH, a European retrofit residential smart lock innovator, and Conneqtech, a European based IoT platform developer specializing in connected mobility and tracking features for bicycles and healthcare. These investments are accounted for using the equity method.

2017

In January 2017, the Company acquired Republic Doors & Frames, LLC ("Republic") through one of its subsidiaries. This acquisitiondid not have a material impact on the Condensed and Consolidated Financial Statements.

In April 2017, iDevices LLC, including the Company's equity investment, was acquired by a third party. The Company recorded a cumulative gain of $5.3 million during the nine months ended September 30, 2017 within Other income, net (see Note 14).

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Debt and Credit Facilities

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Debt and Credit Facilities

Debt and Credit Facilities

Long-term debt and other borrowings consisted of the following:

In millions	September 30, 2018			December 31, 2017
Term Facility	$	665.0		$	691.3
Revolving Facility	—			—
3.200% Senior Notes due 2024	400.0			400.0
3.550% Senior Notes due 2027	400.0			400.0
Other debt	1.0			1.0
Total borrowings outstanding	1,466.0			1,492.3
Less discounts and debt issuance costs, net	(13.3		)	(15.0		)
Total debt	1,452.7			1,477.3
Less current portion of long-term debt	35.0			35.0
Total long-term debt	$	1,417.7		$	1,442.3

Unsecured Credit Facilities

As of September 30, 2018, the Company has an unsecured Credit Agreement in place that provides for up to $1,200.0 million in unsecured financing, consisting of a $700.0 million term loan facility (the “Term Facility”) and a $500.0 million revolving credit facility (the “Revolving Facility” and, together with the Term Facility, the “Credit Facilities”). The Credit Facilities mature on September 12, 2022 and are unconditionally guaranteed jointly and severally on an unsecured basis by the Company and Allegion US Holding Company Inc. ("Allegion US Hold Co"), the Company's wholly-owned subsidiary.

The Term Facility amortizes in quarterly installments at the following rates: 1.25% per quarter starting December 31, 2017 through December 31, 2020, 2.5% per quarter from March, 31, 2021 through June 30, 2022, with the balance due on September 12, 2022. The Company repaid $26.3 million of principal on its Term Facility during the nine months ended September 30, 2018.

The Revolving Facility provides aggregate commitments of up to $500.0 million, which includes up to $100.0 million for the issuance of letters of credit. At September 30, 2018, the Company had $0.0 million outstanding on the Revolving Facility and$17.2 million of letters of credit outstanding.

Outstanding borrowings under the Credit Facilities accrue interest, at the option of the Company of (i) a LIBOR rate plus the applicable margin or (ii) a base rate plus the applicable margin. The applicable margin ranges from 1.125% to 1.500% depending on the Company's credit ratings. At September 30, 2018, the outstanding borrowings under the Credit Facilities accrue interest at LIBOR plus a margin of 1.250%. To manage the Company's exposure to fluctuations in LIBOR rates, the Company has interest rate swaps to fix the interest rate for $250.0 million of the outstanding borrowings (see Note 8).

The Credit Facilities contain negative and affirmative covenants and events of default that, among other things, limit or restrict the Company's ability to enter into certain transactions. In addition, the Credit Facilities require the Company to comply with a maximum leverage ratio and a minimum interest expense coverage ratio, as defined within the agreement. As of September 30, 2018, the Company was in compliance with all covenants.

Senior Notes

As of September 30, 2018, Allegion US Hold Co has $400.0 million outstanding of its 3.200% Senior Notes due 2024 (the “3.200% Senior Notes”) and $400.0 million outstanding of its 3.550% Senior Notes due 2027 (the “3.550% Senior Notes” and, together with the 3.200% Senior Notes, the “Notes”). The Notes require semi-annual interest payments on April 1 and October 1 of each year, and will mature on October 1, 2024 and October 1, 2027, respectively.

The Notes are senior unsecured obligations of Allegion US Hold Co and rank equally with all of Allegion US Hold Co’s existing and future senior unsecured and unsubordinated indebtedness. The guarantee of the Notes is the senior unsecured obligation of the Company and ranks equally with all of the Company's existing and future senior unsecured and unsubordinated indebtedness.

The weighted average interest rate for borrowings was 3.24% under the Credit Facilities (including the effect of interest rate swaps), 3.200% under the 3.200% Senior Notes and 3.550% under the 3.550% Senior Notes at September 30, 2018.

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Financial Instruments

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Financial Instruments

Financial Instruments

In the normal course of business, the Company uses various financial instruments, including derivative instruments, to manage the risks associated with interest and currency rate exposures. These financial instruments are not used for trading or speculative purposes.

When a derivative contract is entered into, the Company designates the derivative instrument as a cash flow hedge of a forecasted transaction, a cash flow hedge of a recognized asset or liability, or as an undesignated derivative. The Company formally documents its hedge relationships, including identification of the derivative instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transaction. This process includes linking derivative instruments that are designated as hedges to specific assets, liabilities or forecasted transactions.

The fair market value of derivative instruments is determined through market-based valuations and may not be representative of the actual gains or losses that will be recorded when these instruments mature due to future fluctuations in the markets in which they are traded.

The Company assesses at inception and at least quarterly thereafter, whether the derivatives used in cash flow hedging transactions are effective in offsetting the changes in the cash flows of the hedged item. To the extent the derivative is deemed to be an effective hedge, the fair market value changes of the instrument are recorded to Accumulated other comprehensive income (AOCI), while changes in the fair market value of derivatives not deemed to be an effective hedge are recorded in Net earnings in the period of change. If the hedging relationship ceases to be effective subsequent to inception, or it becomes probable that a forecasted transaction is no longer expected to occur, the hedging relationship will be undesignated and any future gains and losses on the derivative instrument will be recorded in Net earnings.

Currency Hedging Instruments

The gross notional amount of the Company’s currency derivatives was $74.2 million and $57.7 million at September 30, 2018 and December 31, 2017, respectively. At September 30, 2018 and December 31, 2017, gains of $0.3 million and $0.3 million, net of tax, were included in Accumulated other comprehensive loss related to the Company’s currency derivatives designated as cash flow hedges. The amount expected to be reclassified into Net earnings over the next twelve months is a gain of $0.3 million. The actual amounts that will be reclassified to Net earnings may vary from this amount as a result of changes in market conditions. Gains and losses associated with the Company’s currency derivatives not designated as hedges are recorded in Net earnings as changes in fair value occur. At September 30, 2018, the maximum term of the Company’s currency derivatives was less than one year.

Interest Rate Swaps

The Company has interest rate swaps to fix the interest rate paid during the contract period for $250.0 million of the Company's variable rate Term Facility. These interest rate swaps expire in September 2020 and met the criteria to be accounted for as cash flow hedges of variable rate interest payments. Consequently, the changes in fair value of the interest rate swaps are recognized in Accumulated other comprehensive loss. At September 30, 2018 and December 31, 2017, gains of $5.4 million and $3.5 million, net of tax, were included in Accumulated other comprehensive loss related to these interest rate swaps. The amount expected to be reclassified into Net earnings over the next twelve months is a gain of approximately $2 million. The actual amounts that will be reclassified to Net earnings may vary from this amount as a result of changes in market conditions.

The fair values of derivative instruments included within the Condensed and Consolidated Balance Sheets were as follows:

	Asset derivatives				Liability derivatives
In millions	September 30, 2018		December 31, 2017		September 30, 2018		December 31, 2017
Derivatives designated as hedges:
Currency derivatives	$	0.2	$	0.2	$	0.4	$	0.3
Interest rate swaps	7.9		5.3		—		—
Derivatives not designated as hedges:
Currency derivatives	—		—		0.1		0.4
Total derivatives	$	8.1	$	5.5	$	0.5	$	0.7

Asset and liability currency derivatives included in the table above are recorded within Other current assets and Accrued expenses and other current liabilities, respectively. Interest rate swap derivatives included in the table above are recorded within Other noncurrent assets.

The amounts associated with derivatives designated as hedges affecting Net earnings and Accumulated other comprehensive loss for the three months ended September 30 were as follows:

	Amount of gain (loss) recognized in Accumulated other comprehensive loss				Location of gain (loss) recognized in Net earnings	Amount of gain reclassified from Accumulated other comprehensive loss and recognized into Net earnings
In millions	2018		2017			2018		2017
Currency derivatives	$	—	$	0.6	Cost of goods sold	$	1.3	$	1.0
Interest rate swaps	1.5		0.3		Interest expense	0.6		—
Total	$	1.5	$	0.9		$	1.9	$	1.0

The amounts associated with derivatives designated as hedges affecting Net earnings and Accumulated other comprehensive loss for the nine months ended September 30 were as follows:

	Amount of gain (loss) recognized in Accumulated other comprehensive loss					Location of gain (loss) recognized in Net earnings	Amount of gain reclassified from Accumulated other comprehensive loss and recognized into Net earnings
In millions	2018		2017				2018		2017
Currency derivatives	$	2.2	$	2.2		Cost of goods sold	$	2.3	$	4.0
Interest rate swaps	4.1		(0.5		)	Interest expense	1.5		—
Total	$	6.3	$	1.7			$	3.8	$	4.0

The gains and losses associated with the Company's non-designated currency derivatives, which are offset by changes in the fair value of the underlying transactions, are included within Other income, net in the Condensed and Consolidated Statements of Comprehensive Income.

Concentration of Credit Risk

The counterparties to the Company’s forward contracts and swaps consist of a number of investment grade major international financial institutions. The Company could be exposed to losses in the event of nonperformance by the counterparties. However, the credit ratings and the concentration of risk in these financial institutions are monitored on a continuous basis and present no significant credit risk to the Company.

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Pensions and Postretirement Benefits Other than Pensions

9 Months Ended

Sep. 30, 2018

Retirement Benefits, Description [Abstract]

Pensions and Postretirement Benefits Other than Pensions

Pensions and Postretirement Benefits Other than Pensions

The Company sponsors several U.S. defined benefit and defined contribution plans covering substantially all of its U.S. employees. Additionally, the Company has non-U.S. defined benefit and defined contribution plans covering eligible non-U.S. employees. Postretirement benefits, other than pensions, provide healthcare benefits, and in some instances, life insurance benefits, for certain eligible employees.

Pension Plans

The noncontributory defined benefit pension plans covering non-collectively bargained U.S. employees provide benefits on an average pay formula while most plans for collectively bargained U.S. employees provide benefits on a flat dollar benefit formula. The non-U.S. pension plans generally provide benefits based on earnings and years of service. The Company also maintains additional other supplemental plans for officers and other key employees.

The components of the Company’s Net periodic pension benefit cost (income) for the three and nine months ended September 30 were as follows:

	U.S.
	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Service cost	$	1.7		$	1.7		$	5.2		$	5.3
Interest cost	2.6			2.7			7.7			7.8
Expected return on plan assets	(3.6		)	(3.0		)	(10.9		)	(8.9		)
Administrative costs and other	0.5			0.4			1.4			1.2
Net amortization of:
Prior service costs	—			—			0.2			0.2
Plan net actuarial losses	1.1			1.3			3.0			3.6
Net periodic pension benefit cost	$	2.3		$	3.1		$	6.6		$	9.2

	Non-U.S.
	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Service cost	$	0.4		$	0.3		$	1.4		$	1.1
Interest cost	2.2			2.1			6.4			6.4
Expected return on plan assets	(3.9		)	(3.4		)	(11.7		)	(10.3		)
Administrative costs and other	0.4			0.5			1.2			1.3
Amortization of plan net actuarial losses	0.3			0.4			0.7			1.3
Net periodic pension benefit income	$	(0.6	)	$	(0.1	)	$	(2.0	)	$	(0.2	)

The Service cost component of Net periodic pension benefit cost (income) is recorded in Cost of goods sold and Selling and administrative expenses within the Condensed and Consolidated Statements of Comprehensive Income. The remaining components of Net periodic pension benefit cost (income), including Administrative costs and other, are recorded within Other income, net within the Condensed and Consolidated Statements of Comprehensive Income.

The Company made employer contributions of $6.6 million and $56.0 million (of which $50.0 million was discretionary) during the nine months ended September 30, 2018 and 2017, respectively, to its defined benefit pension plans. Additional contributions of approximately $4 million are expected during the remainder of 2018.

Postretirement Benefits Other Than Pensions

The Company sponsors a postretirement plan that provides for healthcare benefits, and in some instances, life insurance benefits, that cover certain eligible retired employees. The Company funds postretirement benefit obligations principally on a pay-as-you- go basis. Generally, postretirement health benefits are contributory with contributions adjusted annually. Life insurance plans for retirees are primarily noncontributory. Net periodic postretiremenet benefit cost (income) is included within Other income, net within the Condensed and Consolidated Statements of Comprehensive Income.

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Fair Value Measurement

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurement

Fair Value Measurement

Fair value is defined as the exchange price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Fair value measurements are based on a framework that utilizes the inputs market participants use to determine the fair value of an asset or liability and establishes a fair value hierarchy to prioritize those inputs. The fair value hierarchy is comprised of three levels that are described below:

• Level 1 – Inputs based on quoted prices in active markets for identical assets or liabilities.

• Level 2 – Inputs other than Level 1 quoted prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability.

• Level 3 – Unobservable inputs based on little or no market activity and that are significant to the fair value of the assets and liabilities.

The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Observable inputs are obtained from independent sources and can be validated by a third party, whereas unobservable inputs reflect assumptions regarding what a third party would use in pricing an asset or liability based on the best information available under the circumstances. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement.

Assets and liabilities measured at fair value at September 30, 2018 were as follows:

	Fair value measurements						Total fair value
In millions	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Recurring fair value measurements
Assets:
Interest rate swaps	$	—	$	7.9	$	—	$	7.9
Foreign currency contracts	—		0.2		—		0.2
Total asset recurring fair value measurements	—		8.1		—		8.1
Liabilities:
Foreign currency contracts	—		0.5		—		0.5
Deferred compensation and other retirement plans	—		21.3		—		21.3
Total liability recurring fair value measurements	—		21.8		—		21.8
Financial instruments not carried at fair value
Total debt	—		1,403.1		—		1,403.1
Total financial instruments not carried at fair value	$	—	$	1,403.1	$	—	$	1,403.1

Assets and liabilities measured at fair value at December 31, 2017 were as follows:

	Fair value measurements						Total fair value
In millions	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Recurring fair value measurements
Assets:
Interest rate swaps	$	—	$	5.3	$	—	$	5.3
Foreign currency contracts	—		0.2		—		0.2
Total asset recurring fair value measurements	—		5.5		—		5.5
Liabilities:
Foreign currency contracts	—		0.7		—		0.7
Deferred compensation and other retirement plans	—		20.9		—		20.9
Total liability recurring fair value measurements	—		21.6		—		21.6
Financial instruments not carried at fair value
Total debt	—		1,485.2		—		1,485.2
Total financial instruments not carried at fair value	$	—	$	1,485.2	$	—	$	1,485.2

The Company determines the fair value of its financial assets and liabilities using the following methodologies:

• Interest rate swaps – These instruments include interest rate swap contracts for $250.0 million of the Company's variable rate debt. The fair value of the derivative instruments is determined based on quoted prices for the Company's swaps, which is not considered an active market.

• Foreign currency contracts – These instruments include foreign currency contracts for non-functional currency balance sheet exposures. The fair value of the foreign currency contracts is determined based on a pricing model that uses spot rates and forward prices from actively quoted currency markets that are readily accessible and observable.

• Deferred compensation and other retirement plans - These include obligations related to deferred compensation and other retirement plans adjusted for market performance. The fair value is obtained based on observable market prices quoted on public exchanges for similar instruments.

• Debt – These instruments are recorded at cost and include senior notes maturing through 2027. The fair value of the long-term debt instruments is obtained based on observable market prices quoted on public exchanges for similar instruments.

The carrying values of Cash and cash equivalents, Restricted cash, Accounts receivable, Accounts payable and Accrued expenses and Other current liabilities are a reasonable estimate of their fair value due to the short-term nature of these instruments.

These methodologies used by the Company to determine the fair value of its financial assets and liabilities at September 30, 2018 are the same as those used at December 31, 2017. There have been no significant transfers between Level 1 and Level 2 categories.

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Equity

9 Months Ended

Sep. 30, 2018

Stockholders' Equity Note [Abstract]

Equity

Equity

The reconciliation of Ordinary shares is as follows:

In millions	Total
December 31, 2017	95.1
Shares issued under incentive plans, net	0.4
Repurchase of ordinary shares	(0.4	)
September 30, 2018	95.1

During the nine months ended September 30, 2018, the Company paid $30.0 million to repurchase 0.4 million ordinary shares on the open market under a share repurchase authorization previously approved by its Board of Directors.

The components of Equity for the nine months ended September 30, 2018 were as follows:

In millions	Allegion plc shareholders’ equity			Noncontrolling interests			Total equity
Balance at December 31, 2017	$	401.6		$	3.9		$	405.5
Net earnings	302.1			0.4			302.5
Currency translation	(42.2		)	(2.0		)	(44.2		)
Change in value of derivatives qualifying as cash flow hedges, net of tax	1.9			—			1.9
Pension and OPEB adjustments, net of tax	5.1			—			5.1
Total comprehensive income (loss)	266.9			(1.6		)	265.3
Share-based compensation	15.9			—			15.9
Dividends to noncontrolling interests	—			(0.2		)	(0.2		)
Dividends to ordinary shareholders	(59.9		)	—			(59.9		)
Repurchase of ordinary shares	(30.0		)	—			(30.0		)
Shares issued under incentive plans, net	2.4			—			2.4
Balance at September 30, 2018	$	596.9		$	2.1		$	599.0

The components of Equity for the nine months ended September 30, 2017 were as follows:

In millions	Allegion plc shareholders’ equity			Noncontrolling interests			Total equity
Balance at December 31, 2016	$	113.3		$	3.1		$	116.4
Net earnings	263.7			0.9			264.6
Currency translation	86.8			1.1			87.9
Change in value of derivatives qualifying as cash flow hedges, net of tax	(1.5		)	—			(1.5		)
Pension and OPEB adjustments, net of tax	(3.5		)	—			(3.5		)
Total comprehensive income	345.5			2.0			347.5
Cumulative effect of change in accounting principle	(5.0		)	—			(5.0		)
Share-based compensation	12.8			—			12.8
Dividends to noncontrolling interests	—			(0.1		)	(0.1		)
Dividends to ordinary shareholders	(45.6		)	—			(45.6		)
Repurchase of ordinary shares	(60.0		)	—			(60.0		)
Shares issued under incentive plans, net	6.2			—			6.2
Other	—			(0.1		)	(0.1		)
Balance at September 30, 2017	$	367.2		$	4.9		$	372.1

Other Comprehensive Income (Loss)

The changes in Accumulated other comprehensive loss for the nine months ended September 30, 2018 are as follows:

In millions	Cash flow hedges			Pension and OPEB Items			Foreign Currency Items			Total
December 31, 2017	$	3.8		$	(107.6	)	$	(49.1	)	$	(152.9	)
Other comprehensive income (loss) before reclassifications	6.3			2.4			(42.2		)	(33.5		)
Amounts reclassified from accumulated other comprehensive loss(a)	(3.8		)	3.3			—			(0.5		)
Tax expense	(0.7		)	(0.6		)	—			(1.3		)
September 30, 2018	$	5.6		$	(102.5	)	$	(91.3	)	$	(188.2	)

(a) Amounts reclassified from Accumulated other comprehensive loss and recognized into Net earnings related to cash flow hedges are recorded in Cost of goods sold and Interest expense. Amounts reclassified from Accumulated other comprehensive loss and recognized into Net earnings related to pension and OPEB items and foreign currency items are recorded in Other income, net.

The changes in Accumulated other comprehensive loss for the nine months ended September 30, 2017 are as follows:

In millions	Cash flow hedges			Pension and OPEB Items			Foreign Currency Items			Total
December 31, 2016	$	3.4		$	(120.5	)	$	(147.2	)	$	(264.3	)
Other comprehensive income (loss) before reclassifications	1.8			(6.5		)	86.8			82.1
Amounts reclassified from accumulated other comprehensive loss(a)	(4.0		)	3.8			—			(0.2		)
Tax benefit (expense)	0.7			(0.8		)	—			(0.1		)
September 30, 2017	$	1.9		$	(124.0	)	$	(60.4	)	$	(182.5	)

(a) Amounts reclassified from Accumulated other comprehensive loss and recognized into Net earnings related to cash flow hedges are recorded in Cost of goods sold and Interest expense. Amounts reclassified from Accumulated other comprehensive loss and recognized into Net earnings related to pension and OPEB items and foreign currency items are recorded in Other income, net.

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Share-Based Compensation

9 Months Ended

Sep. 30, 2018

Share-based Compensation [Abstract]

Share-Based Compensation

Share-Based Compensation

The Company records share-based compensation awards using a fair value method and recognizes compensation expense for an amount equal to the fair value of the share-based payment issued in its financial statements. The Company’s share-based compensation plans include programs for stock options, restricted stock units ("RSUs"), performance share units ("PSUs") and deferred compensation.

Compensation Expense

Share-based compensation expense is included in Cost of goods sold and Selling and administrative expenses. The expenses recognized for the three and nine months ended September 30 were as follows:

	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Stock options	$	1.0		$	0.7		$	3.9		$	2.7
RSUs	2.6			1.7			8.1			5.9
PSUs	1.1			1.4			4.2			4.5
Deferred compensation	0.6			0.6			1.2			2.0
Pre-tax expense	5.3			4.4			17.4			15.1
Tax benefit	(1.0		)	(1.5		)	(1.9		)	(5.0		)
After-tax expense	$	4.3		$	2.9		$	15.5		$	10.1

Stock Options/RSUs

Eligible participants may receive (i) stock options, (ii) RSUs or (iii) a combination of both stock options and RSUs. Grants issued during the nine months ended September 30 were as follows:

	2018			2017
	Number granted	Weighted- average fair value per award		Number granted	Weighted- average fair value per award
Stock options	160,849	$	21.29	165,113	$	18.22
RSUs	121,928	$	84.86	119,695	$	73.37

The fair value of each of the Company's stock option and RSU awards is expensed on a straight-line basis over the required service period, which is generally the three-year vesting period. However, for stock options and RSUs granted to retirement eligible employees, the Company recognizes expense for the fair value at the grant date.

The average fair value of the stock options granted is determined using the Black-Scholes option-pricing model. The following assumptions were used during the nine months ended September 30:

	2018		2017
Dividend yield	0.97	%	0.89	%
Volatility	22.38	%	24.93	%
Risk-free rate of return	2.75	%	2.08	%
Expected life	6.0 years		6.0 years

Expected volatility is based on the weighted average of the implied volatility of a group of the Company’s peers. The risk-free rate of return is based on the yield curve of a zero-coupon U.S. Treasury bond on the date the award is granted with a maturity equal to the expected term of the award. Historical peer data is used to estimate forfeitures within the Company’s valuation model. The expected life of the Company’s stock option awards is derived from the simplified approach based on the weighted average time to vest and the remaining contractual term and represents the period of time that awards are expected to be outstanding.

Performance Shares

The Company has a Performance Share Program ("PSP") for key employees which provides awards in the form of PSUs based on performance against pre-established objectives. The annual target award level is expressed as a number of the Company's ordinary shares. All PSUs are settled in the form of ordinary shares unless deferred. During the nine months ended September 30, 2018, the Company granted PSUs with a maximum award level of approximately 0.1 million shares.

In February 2016, 2017 and 2018, the Company’s Compensation Committee granted PSUs that were earned based 50% upon a performance condition, measured at each reporting period by earnings per share ("EPS") performance in relation to pre-established targets set by the Compensation Committee, and 50% upon a market condition, measured by the Company’s relative total shareholder return ("TSR") against the S&P 400 Capital Goods Index over a three-year performance period. The fair values of the market conditions are estimated using a Monte Carlo Simulation approach in a risk-neutral framework to model future stock price movements based upon historical volatility, risk-free rates of return and correlation matrix.

Deferred Compensation

The Company allows key employees to defer a portion of their eligible compensation into a number of investment choices including its ordinary share equivalents. Any amounts invested in ordinary share equivalents will be settled in ordinary shares of the Company at the time of distribution.

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Restructuring Activities

9 Months Ended

Sep. 30, 2018

Restructuring Charges [Abstract]

Restructuring Activities

Restructuring Activities

During the three months ended September 30, 2018 and 2017, the Company recorded $2.7 million and $7.4 million, respectively, of expenses associated with restructuring activities. During the nine months ended September 30, 2018 and 2017, the Company recorded $4.1 million and $8.5 million, respectively, of expenses associated with restructuring activities. These expenses are included within Cost of goods sold and Selling and administrative expenses within the Condensed and Consolidated Statements of Comprehensive Income.

The changes in the restructuring reserve during the nine months ended September 30, 2018 were as follows:

In millions	Total
December 31, 2017	$	4.2
Additions, net of reversals	4.1
Cash and non-cash uses	(5.2		)
Currency translation	(0.1		)
September 30, 2018	$	3.0

Costs accrued as of September 30, 2018 are expected to be paid within one year.

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Other, Net

9 Months Ended

Sep. 30, 2018

Other Net [Abstract]

Other, Net

Other Income, Net

The components of Other income, net for the three and nine months ended September 30 were as follows:

	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Interest income	$	(0.4	)	$	(0.3	)	$	(0.7	)	$	(0.6	)
Foreign currency exchange (gain) loss	(0.8		)	(0.1		)	(1.0		)	0.4
Earnings from and gains on the sale of equity investments	—			(0.1		)	(0.1		)	(4.7		)
Net periodic pension and postretirement benefit (income) cost, less service cost	(0.7		)	1.0			(2.3		)	2.6
Other	—			(3.2		)	0.2			(3.3		)
Other income, net	$	(1.9	)	$	(2.7	)	$	(3.9	)	$	(5.6	)

Other income, net for the three and nine months ended September 30, 2018 was primarily related to Net periodic pension and postretirement benefit income, less service cost, and foreign currency exchange gains.

Other income, net for the three months ended September 30, 2017 was primarily related to a gain of $2.9 million related to a legal entity liquidation. Other income, net for the nine months ended September 30, 2017 also included a cumulative gain of $5.3 million from the sale of an equity method investment. These gains were partially offset by Net periodic pension and postretirement benefit cost, less service cost.

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Income Taxes

9 Months Ended

Sep. 30, 2018

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The effective income tax rates for the three months ended September 30, 2018 and 2017 were 10.8% and 19.6%, respectively. The decrease in the effective tax rate compared to 2017 is primarily due to the favorable impact of the Tax Reform Act, including the reduction of the US statutory tax rate and the adjustment recorded to provisional tax amounts previously recognized (see Note 2). The decrease in the effective tax rate is also driven by the year over year change in the recognition of uncertain tax positions, and changes in the mix of income earned in lower rate jurisdictions.

The effective income tax rates for the nine months ended September 30, 2018 and 2017 were 13.1% and 16.7%, respectively. The decrease in the effective tax rate compared to 2017 is primarily due to the favorable impact of the Tax Reform Act, changes in taxes accrued on unremitted earnings and changes in the mix of income earned in lower rate jurisdictions. The favorable impact is partially offset by unfavorable year over year changes in the recognition of both uncertain tax positions and valuation allowances.

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Earnings Per Share (EPS)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share (EPS)

Earnings Per Share (EPS)

Basic EPS is calculated by dividing Net earnings attributable to Allegion plc by the weighted average number of ordinary shares outstanding for the applicable period. Diluted EPS is calculated after adjusting the denominator of the basic EPS calculation for the effect of all potentially dilutive ordinary shares, which in the Company’s case, includes shares issuable under share-based compensation plans.

The following table summarizes the weighted-average number of ordinary shares outstanding for basic and diluted EPS calculations for the three and nine months ended September 30:

	Three months ended		Nine months ended
In millions	2018	2017	2018	2017
Weighted-average number of basic shares	95.1	95.0	95.1	95.2
Shares issuable under incentive stock plans	0.7	0.8	0.7	0.8
Weighted-average number of diluted shares	95.8	95.8	95.8	96.0

At September 30, 2018, 0.1 million stock options were excluded from the computation of weighted average diluted shares outstanding because the effect of including these shares would have been anti-dilutive.

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Net Revenues (Notes)

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Revenue from Contract with Customer [Text Block]

Net Revenues

Net revenues are recognized based on the satisfaction of performance obligations under the terms of a contract. Generally, this occurs when control of a product or service transfers to a customer. Transfer of control typically occurs when goods are shipped from our facilities or at other predetermined control transfer points (for instance, destination terms). Net revenues are measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. Persuasive evidence of a sales arrangement and fixed or determinable price are deemed to be satisfied upon receipt of an executed and legally binding sales agreement or contract that clearly defines the terms and conditions of the transaction including the respective obligations of the parties. If the defined terms and conditions allow variability in all or a component of the price, revenue is not recognized until such time that the price becomes fixed or determinable. At the point of sale, the existence of an enforceable claim that requires payment within a reasonable amount of time is validated and the collectability of that claim is assessed. If collectability is not deemed to be reasonably assured, then revenue recognition is deferred until such time that collectability becomes probable or cash is received. Service and installation revenues are recognized when earned. In some instances, customer acceptance provisions are included in sales arrangements to give the buyer the ability to ensure the delivered product or service meets the criteria established in the order. In these instances, revenue recognition is deferred until the acceptance terms specified in the arrangement are fulfilled through customer acceptance or a demonstration that established criteria have been satisfied. If uncertainty exists about customer acceptance, revenue is not recognized until acceptance has occurred. We do not adjust the transaction price for the effects of a significant financing component, as the time period between control transfer of goods and services is less than one year. The Company’s payment terms are generally consistent with the industries in which their businesses operate.

The Company has two principal revenue streams, tangible product sales and services. Approximately 99% of consolidated Net revenues involve contracts with a single performance obligation, the shipment of tangible products. The remaining Net revenues involve services including installation and consulting. Unlike the single performance obligation to ship a tangible product, the service revenue stream delays revenue recognition until the service performance obligation is satisfied.

Net revenues for tangible product sales and services by business segment for the three and nine months ended September 30, 2018 and 2017 are as follows:

	Three months ended September 30, 2018								Nine months ended September 30, 2018
in millions	Americas		EMEIA		Asia Pacific		Consolidated		Americas		EMEIA		Asia Pacific		Consolidated
Net revenues
Products	$	530.1	$	129.5	$	44.8	$	704.4	$	1,495.9	$	419.6	$	98.7	$	2,014.2
Services	—		4.9		2.2		7.1		—		12.9		2.2		15.1
Total Net Revenues	$	530.1	$	134.4	$	47.0	$	711.5	$	1,495.9	$	432.5	$	100.9	$	2,029.3

	Three months ended September 30, 2017(a)								Nine months ended September 30, 2017(a)
in millions	Americas		EMEIA		Asia Pacific		Consolidated		Americas		EMEIA		Asia Pacific		Consolidated
Net revenues
Products	$	455.2	$	120.6	$	29.1	$	604.9	$	1,331.4	$	360.2	$	81.0	$	1,772.6
Services	—		4.5		—		4.5		—		12.5		—		12.5
Total Net Revenues	$	455.2	$	125.1	$	29.1	$	609.4	$	1,331.4	$	372.7	$	81.0	$	1,785.1

(a) The Company adopted ASU 2014-09 and related updates as of January 1, 2018 on a modified retrospective basis, and as such, amounts presented for the three and nine months ended September 30, 2017 are based on ASC 605.

Tangible product sales are recognized at a point in time at which transfer of control has occurred. Service revenues are recognized over time using a time-based output method applied over the contract term beginning on the date that the service or installation is either provided or made available to the customer. We used the practical expedients to omit the disclosure of remaining performance obligations for contracts with an original expected duration of one year or less and for contracts where we have the right to invoice for performance completed to date. As of September 30, 2018, the contract liability associated with contract revenue is not material. As a practical expedient, we recognize incremental costs of obtaining a contract, if any, as an expense when incurred if the amortization period of the asset would have been one year or less. We do not have any costs to obtain or fulfill a contract that are capitalized under ASC 606.

The Company does offer various sales incentive programs to customers, dealers, and distributors that do not preclude revenue recognition, but do require an accrual for the best estimate of expected activity. These items are accrued for over time based on the Company's historical rates of providing these incentives and annual forecasted sales volumes. During the three and nine months ended September 30, 2018, no adjustments related to performance obligations satisfied in previous periods were recorded. Examples of the sales incentives that are accrued for as a contra receivable and sales deduction at the point of sale include, but are not limited to, discounts (i.e. net 30 type), coupons, and rebates where the customer does not have to provide any additional requirements to receive the discount. Sales returns and customer disputes involving a question of quantity or price are also accounted for as a reduction in revenue and a contra receivable. All other incentives or incentive programs where the customer is required to reach a certain sales level, remain a customer for a certain period, provide a rebate form or is subject to additional requirements are accounted for as a reduction of revenue and establishment of a liability. The Company also offers a standard warranty with most product sales and the value of such warranty is included in the contractual price. The corresponding cost of the warranty obligation is accrued as a liability (see Note 19).

Sales, value-added and other similar taxes that we collect are excluded from revenue. We have elected to account for shipping and handling activities that occur after control of the related goods transfers as fulfillment activities instead of performance obligations.

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Business Segment Information

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Business Segment Information

Business Segment Information

The Company classifies its businesses into the following three reportable segments based on industry and market focus: Americas, EMEIA and Asia Pacific.

The Company largely evaluates performance based on Segment operating income and Segment operating margins. Segment operating income is the measure of profit and loss that the Company’s chief operating decision maker uses to evaluate the financial performance of the business and as the basis for resource allocation, performance reviews, and compensation. For these reasons, the Company believes that Segment operating income represents the most relevant measure of segment profit and loss. The Company’s chief operating decision maker may exclude certain charges or gains, such as corporate charges and other special charges, from Operating income to arrive at a Segment operating income that is a more meaningful measure of profit and loss upon which to base its operating decisions. The Company defines Segment operating margin as Segment operating income as a percentage of Net revenues.

A summary of operations by reportable segment for the three and nine months ended September 30 was as follows:

	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Net revenues
Americas	$	530.1		$	455.2		$	1,495.9		$	1,331.4
EMEIA	134.4			125.1			432.5			372.7
Asia Pacific	47.0			29.1			100.9			81.0
Total	$	711.5		$	609.4		$	2,029.3		$	1,785.1
Segment operating income
Americas	$	153.8		$	133.2		$	415.5		$	383.6
EMEIA	7.6			8.6			27.3			23.1
Asia Pacific	1.5			2.2			0.8			5.1
Total	162.9			144.0			443.6			411.8
Reconciliation to Operating income
Unallocated corporate expense	(20.6		)	(16.9		)	(59.2		)	(50.2		)
Operating income	142.3			127.1			384.4			361.6
Reconciliation to earnings before income taxes
Interest expense	14.0			17.8			40.3			49.7
Other income, net	(1.9		)	(2.7		)	(3.9		)	(5.6		)
Earnings before income taxes	$	130.2		$	112.0		$	348.0		$	317.5

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

The Company is involved in various litigations, claims and administrative proceedings, including those related to environmental and product warranty matters. Amounts recorded for identified contingent liabilities are estimates, which are reviewed periodically and adjusted to reflect additional information when it becomes available. Subject to the uncertainties inherent in estimating future costs for contingent liabilities, except as expressly set forth in this note, management believes that any liability which may result from these legal matters would not have a material adverse effect on the financial condition, results of operations, liquidity or cash flows of the Company.

Environmental Matters

The Company is dedicated to an environmental program to reduce the utilization and generation of hazardous materials during the manufacturing process and to remediate identified environmental concerns. As to the latter, the Company is currently engaged in site investigations and remediation activities to address environmental cleanup from past operations at current and former production facilities. The Company regularly evaluates its remediation programs and considers alternative remediation methods that are in addition to, or in replacement of, those currently utilized by the Company based upon enhanced technology and regulatory changes. Changes to the Company's remediation programs may result in increased expenses and increased environmental reserves.

The Company is sometimes a party to environmental lawsuits and claims and from time to time receives notices of potential violations of environmental laws and regulations from the U.S. Environmental Protection Agency and similar state authorities. It has also been identified as a potentially responsible party ("PRP") for cleanup costs associated with off-site waste disposal at federal Superfund and state remediation sites. For all such sites, there are other PRPs and, in most instances, the Company’s involvement is minimal.

In estimating its liability, the Company has assumed it will not bear the entire cost of remediation of any site to the exclusion of other PRPs who may be jointly and severally liable. The ability of other PRPs to participate has been taken into account, based on our understanding of the parties’ financial condition and probable contributions on a per site basis. Additional lawsuits and claims involving environmental matters are likely to arise from time to time in the future.

During the three months ended September 30, 2018 and 2017, the Company recorded $0.4 million and $0.5 million of expenses for environmental remediation at sites presently or formerly owned or leased by the Company. During the nine months ended September 30, 2018 and 2017, the Company recorded $1.7 million and $2.0 million of expenses for environmental remediation at sites presently or formerly owned or leased by the Company.

As of September 30, 2018 and December 31, 2017, the Company has recorded reserves for environmental matters of $24.1 million and $28.9 million, respectively. The total reserve at September 30, 2018 and December 31, 2017, included $6.7 million and $8.9 million, respectively, related to remediation of sites previously disposed by the Company. Environmental reserves are classified as Accrued expenses and other current liabilities or Other noncurrent liabilities based on their expected term. The Company's total current environmental reserve at September 30, 2018 and December 31, 2017 was $6.4 million and $12.6 million, respectively, and the remainder is classified as noncurrent. Given the evolving nature of environmental laws, regulations and technology, the ultimate cost of future compliance is uncertain.

Warranty Liability

Standard product warranty accruals are recorded at the time of sale and are estimated based upon product warranty terms and historical experience. The Company assesses the adequacy of its liabilities and will make adjustments as necessary based on known or anticipated warranty claims, or as new information becomes available.

The changes in the standard product warranty liability for the nine months ended September 30 were as follows:

In millions	2018			2017
Balance at beginning of period	$	14.1		$	13.3
Reductions for payments	(5.9		)	(5.5		)
Accruals for warranties issued during the current period	6.1			6.2
Changes to accruals related to preexisting warranties	(0.1		)	(0.7		)
Acquisitions	0.5			—
Translation	(0.1		)	0.4
Balance at end of period	$	14.6		$	13.7

Standard product warranty liabilities are classified as Accrued expenses and other current liabilities.

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Guarantor Financial Information (Notes)

9 Months Ended

Sep. 30, 2018

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Condensed Financial Information of Parent Company Only Disclosure [Text Block]

Guarantor Financial Information

Allegion US Hold Co is the issuer of the 3.200% and 3.550% Senior Notes. Allegion plc is the guarantor of the 3.200% and 3.550% Senior Notes. The following condensed and consolidated financial information of Allegion plc, Allegion US Hold Co, and the other Allegion subsidiaries that are not guarantors (the "Other Subsidiaries") on a combined basis as of September 30, 2018 and for the three and nine months ended September 30, 2018 and 2017, is being presented in order to meet the reporting requirements under the Senior Notes indenture and Rule 3-10 of Regulation S-X. In accordance with Rule 3-10(d) of Regulation S-X, separate financial statements for the Issuer, Allegion plc, whom is the guarantor, are not required to be filed with the SEC as the subsidiary debt issuer is directly or indirectly 100% owned by the Parent, whom is the guarantor, and the guarantees are full and unconditional and joint and several.

During the nine months ended September 30, 2018, an entity previously presented in the "Other Subsidiaries" column merged with Allegion US Hold Co. The entity merged with Allegion US Hold Co primarily includes intercompany investments and related equity; there is no material statement of comprehensive income or cash flow activity related to this entity. As a result, the following condensed and consolidated financial information presented below as of December 31, 2017, and for the three and nine months ended September 30, 2017 has been updated to reflect this new structure.

Condensed and Consolidated Statement of Comprehensive Income

For the three months ended September 30, 2018

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net revenues	$	—		$	—		$	711.5		$	—		$	711.5
Cost of goods sold	—			—			402.1			—			402.1
Selling and administrative expenses	1.3			—			165.8			—			167.1
Operating income (loss)	(1.3		)	—			143.6			—			142.3
Equity earnings (loss) in affiliates, net of tax	124.5			73.2			—			(197.7		)	—
Interest expense	7.2			6.4			0.4			—			14.0
Intercompany interest and fees	—			26.3			(26.3		)	—			—
Other income, net	—			—			(1.9		)	—			(1.9		)
Earnings (loss) before income taxes	116.0			40.5			171.4			(197.7		)	130.2
Provision (benefit) for income taxes	—			(7.7		)	21.8			—			14.1
Net earnings (loss)	116.0			48.2			149.6			(197.7		)	116.1
Less: Net loss attributable to noncontrolling interests	—			—			0.1			—			0.1
Net earnings (loss) attributable to Allegion plc	$	116.0		$	48.2		$	149.5		$	(197.7	)	$	116.0
Total comprehensive income (loss)	$	103.9		$	48.1		$	142.5		$	(191.2	)	$	103.3
Less: Total comprehensive loss attributable to noncontrolling interests	—			—			(0.6		)	—			(0.6		)
Total comprehensive income (loss) attributable to Allegion plc	$	103.9		$	48.1		$	143.1		$	(191.2	)	$	103.9

Condensed and Consolidated Statement of Comprehensive Income

For the nine months ended September 30, 2018

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net revenues	$	—		$	—		$	2,029.3		$	—		$	2,029.3
Cost of goods sold	—			—			1,156.5			—			1,156.5
Selling and administrative expenses	4.6			—			483.8			—			488.4
Operating income (loss)	(4.6		)	—			389.0			—			384.4
Equity earnings (loss) in affiliates, net of tax	327.0			146.4			—			(473.4		)	—
Interest expense	20.3			19.4			0.6			—			40.3
Intercompany interest and fees	—			78.2			(78.2		)	—			—
Other income, net	—			—			(3.9		)	—			(3.9		)
Earnings (loss) before income taxes	302.1			48.8			470.5			(473.4		)	348.0
Provision (benefit) for income taxes	—			(20.0		)	65.5			—			45.5
Net earnings (loss)	302.1			68.8			405.0			(473.4		)	302.5
Less: Net earnings attributable to noncontrolling interests	—			—			0.4			—			0.4
Net earnings (loss) attributable to Allegion plc	$	302.1		$	68.8		$	404.6		$	(473.4	)	$	302.1
Total comprehensive income (loss)	$	266.9		$	70.7		$	365.8		$	(438.1	)	$	265.3
Less: Total comprehensive loss attributable to noncontrolling interests	—			—			(1.6		)	—			(1.6		)
Total comprehensive income (loss) attributable to Allegion plc	$	266.9		$	70.7		$	367.4		$	(438.1	)	$	266.9

Condensed and Consolidated Statement of Comprehensive Income

For the three months ended September 30, 2017

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net revenues	$	—		$	—		$	609.4		$	—		$	609.4
Cost of goods sold	—			—			335.0			—			335.0
Selling and administrative expenses	1.2			—			146.1			—			147.3
Operating income (loss)	(1.2		)	—			128.3			—			127.1
Equity earnings (loss) in affiliates, net of tax	104.2			(16.5		)	—			(87.7		)	—
Interest expense (income)	13.2			4.7			(0.1		)	—			17.8
Intercompany interest and fees	—			(75.2		)	75.2			—			—
Other income, net	—			—			(2.7		)	—			(2.7		)
Earnings (loss) before income taxes	89.8			54.0			55.9			(87.7		)	112.0
Provision (benefit) for income taxes	—			27.2			(5.3		)	—			21.9
Net earnings (loss)	89.8			26.8			61.2			(87.7		)	90.1
Less: Net earnings attributable to noncontrolling interests	—			—			0.3			—			0.3
Net earnings (loss) attributable to Allegion plc	$	89.8		$	26.8		$	60.9		$	(87.7	)	$	89.8
Total comprehensive income (loss)	$	111.9		$	27.1		$	84.0		$	(110.3	)	$	112.7
Less: Total comprehensive income attributable to noncontrolling interests	—			—			0.8			—			0.8
Total comprehensive income (loss) attributable to Allegion plc	$	111.9		$	27.1		$	83.2		$	(110.3	)	$	111.9

Condensed and Consolidated Statement of Comprehensive Income

For the nine months ended September 30, 2017

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net revenues	$	—		$	—		$	1,785.1		$	—		$	1,785.1
Cost of goods sold	—			—			988.2			—			988.2
Selling and administrative expenses	3.8			—			431.5			—			435.3
Operating income (loss)	(3.8		)	—			365.4			—			361.6
Equity earnings (loss) in affiliates, net of tax	302.8			53.5			0.6			(356.9		)	—
Interest expense	35.3			14.2			0.2			—			49.7
Intercompany interest and fees	—			(21.1		)	21.1			—			—
Other income, net	—			—			(5.6		)	—			(5.6		)
Earnings (loss) before income taxes	263.7			60.4			350.3			(356.9		)	317.5
Provision for income taxes	—			2.8			50.1			—			52.9
Net earnings (loss)	263.7			57.6			300.2			(356.9		)	264.6
Less: Net earnings attributable to noncontrolling interests	—			—			0.9			—			0.9
Net earnings (loss) attributable to Allegion plc	$	263.7		$	57.6		$	299.3		$	(356.9	)	$	263.7
Total comprehensive income (loss)	$	345.5		$	57.2		$	384.3		$	(439.5	)	$	347.5
Less: Total comprehensive income attributable to noncontrolling interests	—			—			2.0			—			2.0
Total comprehensive income (loss) attributable to Allegion plc	$	345.5		$	57.2		$	382.3		$	(439.5	)	$	345.5

Condensed and Consolidated Balance Sheet

September 30, 2018

In millions	Allegion plc		Allegion US Holding			Other Subsidiaries		Consolidating Adjustments			Total
Current assets:
Cash and cash equivalents	$	0.6	$	14.0		$	175.1	$	—		$	189.7
Restricted cash	—		—			6.8		—			6.8
Accounts and notes receivable, net	—		—			361.4		—			361.4
Inventories	—		—			278.3		—			278.3
Other current assets	0.8		24.7			20.2		(8.6		)	37.1
Accounts and notes receivable affiliates	—		473.6			342.8		(816.4		)	—
Total current assets	1.4		512.3			1,184.6		(825.0		)	873.3
Investment in affiliates	1,227.8		652.9			—		(1,880.7		)	—
Property, plant and equipment, net	—		—			273.3		—			273.3
Goodwill and other intangible assets, net	—		—			1,436.4		—			1,436.4
Notes receivable affiliates	25.5		1,483.7			2,613.8		(4,123.0		)	—
Other noncurrent assets	4.3		30.4			112.4		—			147.1
Total assets	$	1,259.0	$	2,679.3		$	5,620.5	$	(6,828.7	)	$	2,730.1
Current liabilities:
Accounts payable and accruals	$	1.8	$	13.5		$	445.2	$	(8.6	)	$	451.9
Short-term borrowings and current maturities of long-term debt	35.0		—			—		—			35.0
Accounts and notes payable affiliates	—		342.9			473.5		(816.4		)	—
Total current liabilities	36.8		356.4			918.7		(825.0		)	486.9
Long-term debt	624.2		792.5			1.0		—			1,417.7
Notes payable affiliate	—		2,613.8			1,509.2		(4,123.0		)	—
Other noncurrent liabilities	1.1		4.7			220.7		—			226.5
Total liabilities	662.1		3,767.4			2,649.6		(4,948.0		)	2,131.1
Equity:
Total shareholders equity (deficit)	596.9		(1,088.1		)	2,968.8		(1,880.7		)	596.9
Noncontrolling interests	—		—			2.1		—			2.1
Total equity (deficit)	596.9		(1,088.1		)	2,970.9		(1,880.7		)	599.0
Total liabilities and equity	$	1,259.0	$	2,679.3		$	5,620.5	$	(6,828.7	)	$	2,730.1

Condensed and Consolidated Balance Sheet

December 31, 2017

In millions	Allegion plc		Allegion US Holding			Other Subsidiaries		Consolidating Adjustments			Total
Current assets:
Cash and cash equivalents	$	0.7	$	0.3		$	465.2	$	—		$	466.2
Accounts and notes receivable, net	—		—			296.6		—			296.6
Inventories	—		—			239.8		—			239.8
Other current assets	0.3		56.3			17.6		(44.1		)	30.1
Accounts receivable affiliates	—		430.0			305.3		(735.3		)	—
Total current assets	1.0		486.6			1,324.5		(779.4		)	1,032.7
Investment in affiliates	1,079.6		240.8			—		(1,320.4		)	—
Property, plant and equipment, net	—		—			252.2		—			252.2
Goodwill and other intangible assets, net	—		—			1,155.5		—			1,155.5
Notes receivable affiliates	3.5		1,580.3			2,381.0		(3,964.8		)	—
Other noncurrent assets	5.1		5.5			91.0		—			101.6
Total assets	$	1,089.2	$	2,313.2		$	5,204.2	$	(6,064.6	)	$	2,542.0
Current liabilities:
Accounts payable and accruals	$	1.9	$	7.0		$	461.0	$	(44.1	)	$	425.8
Short-term borrowings and current maturities of long-term debt	35.0		—			—		—			35.0
Accounts and notes payable affiliates	0.2		304.9			430.2		(735.3		)	—
Total current liabilities	37.1		311.9			891.2		(779.4		)	460.8
Long-term debt	649.3		792.0			1.0		—			1,442.3
Notes payables affiliate	—		2,381.0			1,583.8		(3,964.8		)	—
Other noncurrent liabilities	1.2		4.2			228.0		—			233.4
Total liabilities	687.6		3,489.1			2,704.0		(4,744.2		)	2,136.5
Equity:
Total shareholders equity (deficit)	401.6		(1,175.9		)	2,496.3		(1,320.4		)	401.6
Noncontrolling interests	—		—			3.9		—			3.9
Total equity (deficit)	401.6		(1,175.9		)	2,500.2		(1,320.4		)	405.5
Total liabilities and equity	$	1,089.2	$	2,313.2		$	5,204.2	$	(6,064.6	)	$	2,542.0

Condensed and Consolidated Statement of Cash Flows

For the nine months ended September 30, 2018

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net cash provided by (used in) operating activities	$	135.4		$	(68.5	)	$	402.5		$	(209.0	)	$	260.4
Cash flows from investing activities:
Capital expenditures	—			—			(31.8		)	—			(31.8		)
Acquisition of and equity investments in businesses, net of cash acquired	—			(247.1		)	(128.7		)	—			(375.8		)
Other investing activities, net	—			—			(1.1		)	—			(1.1		)
Net cash used in investing activities	—			(247.1		)	(161.6		)	—			(408.7		)
Cash flows from financing activities:
Debt repayments, net	(26.3		)	—			(1.1		)	—			(27.4		)
Net inter-company proceeds (payments)	(22.0		)	329.3			(307.3		)	—			—
Dividends paid	—			—			(209.0		)	209.0			—
Dividends paid to shareholders	(59.6		)	—			—			—			(59.6		)
Repurchase of ordinary shares	(30.0		)	—			—			—			(30.0		)
Other financing activities, net	2.4			—			(2.3		)	—			0.1
Net cash (used in) provided by financing activities	(135.5		)	329.3			(519.7		)	209.0			(116.9		)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	—			—			(4.5		)	—			(4.5		)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(0.1		)	13.7			(283.3		)	—			(269.7		)
Cash, cash equivalents, and restricted cash - beginning of period	0.7			0.3			465.2			—			466.2
Cash, cash equivalents, and restricted cash - end of period	$	0.6		$	14.0		$	181.9		$	—		$	196.5

Condensed and Consolidated Statement of Cash Flows

For the nine months ended September 30, 2017

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net cash provided by (used in) operating activities	$	67.4		$	123.1		$	193.1		$	(213.6	)	$	170.0
Cash flows from investing activities:
Capital expenditures	—			—			(33.7		)	—			(33.7		)
Acquisition of businesses, net of cash acquired	—			—			(20.8		)	—			(20.8		)
Proceeds from sales and maturities of marketable securities	—			—			15.5			—			15.5
Other investing activities, net	—			—			2.9			—			2.9
Net cash used in investing activities	—			—			(36.1		)	—			(36.1		)
Cash flows from financing activities:
Debt repayments, net	(14.8		)	—			(1.3		)	—			(16.1		)
Debt issuance costs	(2.9		)	(0.1		)	—			—			(3.0		)
Net inter-company proceeds (payments)	50.3			(17.5		)	(32.8		)	—			—
Dividends paid	—			(105.5		)	(108.1		)	213.6			—
Dividends paid to shareholders	(45.6		)	—			—			—			(45.6		)
Repurchase of ordinary shares	(60.0		)	—			—			—			(60.0		)
Other financing activities, net	6.2			—			(0.2		)	—			6.0
Net cash (used in) provided by financing activities	(66.8		)	(123.1		)	(142.4		)	213.6			(118.7		)
Effect of exchange rate changes on cash and cash equivalents	—			—			7.3			—			7.3
Net increase in cash and cash equivalents	0.6			—			21.9			—			22.5
Cash and cash equivalents - beginning of period	0.5			0.2			311.7			—			312.4
Cash and cash equivalents - end of period	$	1.1		$	0.2		$	333.6		$	—		$	334.9

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Recent Accounting Pronouncements (Policies)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Recently Adopted Accounting Pronouncements:

In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers" (ASC 606). ASC 606 is a single, comprehensive revenue recognition model for all contracts with customers. The model is based on changes in contract assets (rights to receive consideration) and liabilities (obligations to provide a good or perform a service). Revenue is recognized based on the satisfaction of performance obligations, which occurs when control of a good or service transfers to a customer. ASC 606

contains expanded disclosure requirements relating to the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. ASC 606 allows entities to adopt the standard on either a full retrospective approach or report the cumulative effect as of the date of adoption ("modified retrospective method"). The FASB has also issued the following standards which clarify ASU 2014-09: ASU 2017-14, Revenue Recognition, Revenue from Contracts with Customers: Amendments to SEC Paragraphs Pursuant to Staff Accounting Bulletin No. 116 and SEC Release No. 33-10403, ASU 2017-13, Revenue Recognition, Revenue from Contracts with Customers: Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Rescission of Prior SEC Staff Announcements and Observer Comments, ASU 2016-20, Revenue from Contracts with Customers: Technical Corrections and Improvements, ASU 2016-12, Revenue from Contracts with Customers: Narrow-Scope Improvements and Practical Expedients and ASU 2016-10, Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing. The Company adopted each of these standards on January 1, 2018 on a modified retrospective basis. The impact of adopting the new standards was not material to the Company’s Condensed and Consolidated Financial Statements at January 1, 2018 or for the three or nine months ended September 30, 2018, and no cumulative effect adjustment was recorded to opening retained earnings. Expanded disclosure as required by the new standards is presented within Note 17 to the Condensed and Consolidated Financial Statements.

In August 2016, the FASB issued ASU 2016-15, "Statement of Cash Flows (Topic 230): Clarification of Certain Cash Receipts and Cash Payments." ASU 2016-15 eliminates the diversity in practice related to the classification of certain cash receipts and payments in the statement of cash flows, by adding or clarifying guidance on eight specific cash flow issues. The ASU is effective for annual and interim reporting periods beginning after December 15, 2017, and as such, the Company adopted ASU 2016-15 on January 1, 2018. The amendments in this update are required to be applied retrospectively to all periods presented. The adoption of ASU 2016-15 did not have a material impact on the Condensed and Consolidated Financial Statements.

In January 2017, the FASB issued ASU 2017-01, "Business Combinations (Topic 805): Clarifying the Definition of a Business." This update provides guidance to assist companies in evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The update provides a more robust framework to use in determining when a set of transferred assets and activities is a business. This ASU is effective for annual and interim reporting periods beginning after December 15, 2017, and requires prospective adoption. The Company adopted ASU 2017-01 on January 1, 2018. The adoption of ASU 2017-01 did not have a material impact on the Condensed and Consolidated Financial Statements.

In March 2017, the FASB issued ASU 2017-07, "Compensation—Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost." ASU 2017-07 requires that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the statement of comprehensive income separately from the service cost component and outside a subtotal of operating income. ASU 2017-07 also allows only the service cost component to be eligible for capitalization when applicable (for example, as a cost of internally manufactured inventory or a self-constructed asset). The ASU is effective for annual periods beginning after December 15, 2017, and as such, the Company adopted ASU 2017-07 on January 1, 2018. The Company has applied ASU 2017-07 retrospectively for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the Condensed and Consolidated Statements of Comprehensive Income and prospectively for the capitalization of the service cost component of net periodic pension cost and net periodic postretirement benefit in assets. The adoption of ASU 2017-07 did not have a material impact on the Condensed and Consolidated Financial Statements.

In August 2017, the FASB issued ASU 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities." ASU 2017-12 addresses previous limitations on how an entity can designate the hedged risk in certain cash flow and fair value hedging relationships by expanding and refining hedge accounting for both nonfinancial and financial risk components and aligning the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. The ASU is effective for annual periods beginning after December 15, 2018, with early adoption permitted. The Company elected to early adopt the provisions of ASU 2017-12 on January 1, 2018. The amendments in this update have been applied to hedging relationships existing on the date of adoption. The adoption of ASU 2017-12 did not have a material impact on the Condensed and Consolidated Financial Statements.

In March 2018, the FASB issued ASU 2018-05, "Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118". The overarching purpose of ASU 2018-05 is to codify the guidance issued by the SEC related to income tax accounting implications due to the comprehensive U.S. tax legislation commonly referred to as the Tax Cuts and Jobs Act enacted on December 22, 2017 (the "Tax Reform Act"), as originally discussed within Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (SAB 118) within ASC 740, Income Taxes. SAB 118, and now ASC 740 provide a measurement period, which in no case should extend beyond one year from the Tax Reform Act enactment date, during which a company acting in good faith may complete the accounting for the impacts of the Tax Reform Act. To the extent that a company’s accounting for certain income tax effects of the Tax Reform Act is incomplete, the company can determine a reasonable estimate for those effects and record a provisional estimate in the financial statements in the first reporting period in which a reasonable estimate can be determined. If a company cannot determine a provisional estimate to be included in the financial statements, the company should continue to apply ASC 740 based on the provisions of the tax laws that were in effect immediately prior to the Tax Reform Act being enacted. At December 31, 2017, the Company recorded a provisional valuation allowance related to interest limitation carryforwards and other adjustments to the net deferred tax assets, with a corresponding discrete net tax charge of $22.8 million. On April 2, 2018, IRS Notice 2018-28 was issued to provide guidance to assist taxpayers in complying with providing transition guidance related to interest limitation carryforwards recorded at the enactment date. Management is in process of evaluating IRS Notice 2018-28 and assessing its impact on the provisional valuation allowance recorded at December 31, 2017. During the three-month period ended September 30, 2018, an adjustment resulting in a $3.3 million tax benefit was made to the provisional amounts previously recognized related to the Tax Reform Act, primarily relating to clarified guidance received during the quarter around the deductibility of certain executive compensation. The Company will continue to analyze impacts from the enactment of the Tax Reform Act on its Condensed and Consolidated Financial Statements, and any additional impacts will be recorded as they are identified during the measurement period as provided for in SAB 118, which extends up to one year from the enactment date.

Recently Issued Accounting Pronouncements

In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)." ASU 2016-02 requires the identification of arrangements that should be accounted for as leases by lessees. In general, for lease arrangements exceeding a twelve month term, these arrangements will be recognized as assets and liabilities on the balance sheet of the lessee. Under ASU 2016-02, a right-of-use asset and lease obligation will be recorded for all leases, whether operating or financing, while the income statement will reflect lease expense for operating leases and amortization/interest expense for financing leases. In July 2018, the FASB issued ASU 2018-10, "Codification Improvements to Topic 842 (Leases)", which provides narrow amendments to clarify how to apply certain aspects of ASU 2016-02, and ASU 2018-11, "Leases (Topic 842): Targeted Improvements", which provides adopters an additional transition method by allowing entities to initially apply ASU 2016-02, and subsequent related standards, at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. These ASUs are effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods. Early adoption is permitted. The Company is in the process of updating its systems, policies, and internal controls over financial reporting in anticipation of adopting these standards on January 1, 2019. The Company will utilize the new cumulative-effect adjustment transition method allowed per ASU 2018-11. The Company also currently anticipates electing the following practical expedients available within these standards:

• The Company will elect to not separate non-lease components from lease components and instead to account for each separate lease component and the non-lease components associated with that lease component as a single lease component.

• If at the lease commencement date a lease has a lease term of 12 months or less and does not include a purchase option that is reasonably certain to exercise, the Company will elect not to apply ASC 842 recognition requirements. Nonetheless, the Company intends to include leases of less than 12 months within the updated footnote disclosures.

• If the Company enters into a large number of leases in the same month with the same terms and conditions, these will be looked at as a group (portfolio) assuming the lease model under this approach will not materially differ from applying to each individual lease.

• If available, the rate implicit in the lease will be used as the discount rate. However, if this is not available, the Company will use it's incremental borrowing rate as the discount rate, defined as the weighted average rate of total outstanding debt, gross of any hedging contracts.

• As the Company will apply the new transition method allowed per ASU 2018-11, the Company will elect to not reassess arrangements entered into prior than January 1, 2019 for whether an arrangement is or contains a lease, the lease classification applied, or to separate initial direct costs.

The Company is continuing to assess what the complete impact these ASUs and the related practical expedients will have on the Condensed and Consolidated Financial Statements; however, the Company anticipates that adoption will result in the recognition of a significant right-of-use asset and lease liability on its Condensed and Consolidated Balance Sheets. Changes to processes and internal controls to meet the new standards' reporting and disclosure requirements have been identified and are being implemented. Software has been implemented that will assist in the recognition of the right-to-use asset and lease liability to be included on the Condensed and Consolidated Balance Sheets related to leases currently classified as operating leases with durations greater than twelve months, with certain allowable exceptions. The Company is in the process of reviewing its lease portfolio, as well as other agreements not currently classified as leases, for embedded leases and to ensure appropriate classification and disclosure under the new standards.

In June 2016, the FASB issued ASU 2016-13, "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." The new guidance introduces an approach based on expected losses to estimate credit losses on certain types of financial instruments. The ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. The Company is assessing what impact ASU 2016-13 will have on the Condensed and Consolidated Financial Statements.

In February 2018, the FASB issued ASU 2018-02, "Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income." The new guidance permits entities to reclassify tax effects stranded in accumulated other comprehensive income (AOCI) as a result of the Tax Reform Act. ASU 2018-02 provides this option not only for the impact to deferred tax assets and liabilities due to the reduction in the U.S. tax rate, but also for tax effects stranded in AOCI for other reasons specific to the Tax Reform Act, such as state taxes or transitioning to a territorial tax system. Tax effects that are stranded in AOCI for reasons not relating to the Tax Reform Act may not be reclassified under ASU 2018-02. This ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. Entities that adopt the ASU in an annual or interim period after the period of enactment are able to choose whether to apply the amendments retrospectively to each period in which the effect of the Tax Reform Act is recognized or to apply the amendments in the period of adoption. The Company is assessing what impact ASU 2018-02 will have on the Condensed and Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-13, "Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement." The new guidance modifies the disclosure requirements related to fair value measurements in Topic 820, Fair Value Measurement, including removing certain previous disclosure requirements, adding certain new disclosure requirements, and modifying certain other disclosure requirements. The ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. The Company elected to early adopt ASU 2018-13 on October 1, 2018. The adoption is not expected to have a material impact on the Condensed and Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-14, "Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans." The new guidance modifies the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans, including removing certain previous disclosure requirements, adding certain new disclosure requirements, and clarifying certain other disclosure requirements. The ASU will be effective for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. Early adoption is permitted. The Company elected to early adopt ASU 2018-14 on October 1, 2018. The adoption is not expected to have a material impact on the Condensed and Consolidated Financial Statements.

In August 2018, the FASB issued ASU 2018-15, "Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract." The new guidance aligns the requirements for capitalizing implementation costs incurred in a cloud-based hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The ASU will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. The Company is assessing what impact ASU 2018-15 will have on the Condensed and Consolidated Financial Statements.

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Inventories (Tables)

9 Months Ended

Sep. 30, 2018

Inventory, Net [Abstract]

Major Classes Of Inventory

The major classes of inventory were as follows:

In millions	September 30, 2018		December 31, 2017
Raw materials	$	60.5	$	66.6
Work-in-process	25.7		29.8
Finished goods	192.1		143.4
Total	$	278.3	$	239.8

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Goodwill (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill Disclosure [Abstract]

Changes in Goodwill Carrying Amounts

The changes in the carrying amount of goodwill for the nine months ended September 30, 2018 were as follows:

In millions	Americas		EMEIA			Asia Pacific			Total
December 31, 2017 (gross)	$	375.2	$	769.8		$	101.7		$	1,246.7
Accumulated impairment	—		(478.6		)	(6.9		)	(485.5		)
December 31, 2017 (net)	375.2		291.2			94.8			761.2
Acquisitions	107.5		9.2			15.8			132.5
Currency translation	0.2		(9.6		)	(6.3		)	(15.7		)
September 30, 2018 (net)	$	482.9	$	290.8		$	104.3		$	878.0

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Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Intangible Assets Disclosure [Abstract]

Schedule of Intangible Asset Net of Goodwill

The gross amount of the Company’s intangible assets and related accumulated amortization were as follows:

	September 30, 2018							December 31, 2017
In millions	Gross carrying amount		Accumulated amortization			Net carrying amount		Gross carrying amount		Accumulated amortization			Net carrying amount
Completed technologies/patents	$	59.0	$	(13.1	)	$	45.9	$	32.6	$	(10.0	)	$	22.6
Customer relationships	423.6		(84.5		)	339.1		324.5		(74.1		)	250.4
Trade names (finite-lived)	87.9		(47.1		)	40.8		89.0		(46.1		)	42.9
Other	9.1		(6.1		)	3.0		7.9		(4.9		)	3.0
Total finite-lived intangible assets	579.6		$	(150.8	)	428.8		454.0		$	(135.1	)	318.9
Trade names (indefinite-lived)	129.6					129.6		75.4					75.4
Total	$	709.2				$	558.4	$	529.4				$	394.3

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Acquisition (Tables)

9 Months Ended

Sep. 30, 2018

Business Combinations [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

The preliminary allocation of the aggregate purchase price to assets acquired and liabilities assumed for the acquisitions described above is as follows:

In millions
Accounts receivable, net	$	29.8
Inventories	28.7
Other current assets	1.3
Property, plant and equipment, net	27.6
Goodwill	132.5
Intangible assets, net	204.3
Other noncurrent assets	0.9
Accounts payable	(11.1		)
Accrued expenses and other current liabilities	(35.2		)
Other noncurrent liabilities	(4.7		)
Total consideration	$	374.1

Business Acquisition, Pro Forma Information [Table Text Block]

The following unaudited pro forma financial information for the three and nine months ended September 30, 2018 and 2017 reflects the consolidated results of operations of the Company as if these acquisitions had taken place on January 1, 2017:

	Three months ended				Nine months ended
In millions, except per share amounts	2018		2017		2018		2017
Net revenues	$	711.5	$	663.6	$	2,071.8	$	1,939.3
Net earnings attributable to Allegion plc	$	119.3	$	93.4	$	313.1	$	263.2
Basic net earnings per share	$	1.25	$	0.98	$	3.29	$	2.76
Diluted net earnings per share	$	1.25	$	0.97	$	3.27	$	2.74

Revenues and Net earnings from acquired business [Table Text Block]

The following financial information reflects Net revenues and Earnings before income taxes of the acquisitions for the three and nine months ended September 30, 2018 since their respective acquisition dates included in the Condensed and Consolidated Statement of Comprehensive Income:

In millions	Three months ended September 30, 2018		Nine months ended September 30, 2018
Net revenues	$	55.0	$	115.0
Earnings before income taxes	$	0.9	$	(0.7	)

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Debt and Credit Facilities (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Schedule of Debt

ong-term debt and other borrowings consisted of the following:

In millions	September 30, 2018			December 31, 2017
Term Facility	$	665.0		$	691.3
Revolving Facility	—			—
3.200% Senior Notes due 2024	400.0			400.0
3.550% Senior Notes due 2027	400.0			400.0
Other debt	1.0			1.0
Total borrowings outstanding	1,466.0			1,492.3
Less discounts and debt issuance costs, net	(13.3		)	(15.0		)
Total debt	1,452.7			1,477.3
Less current portion of long-term debt	35.0			35.0
Total long-term debt	$	1,417.7		$	1,442.3

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Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of the Fair Values of Derivative Instruments

The fair values of derivative instruments included within the Condensed and Consolidated Balance Sheets were as follows:

	Asset derivatives				Liability derivatives
In millions	September 30, 2018		December 31, 2017		September 30, 2018		December 31, 2017
Derivatives designated as hedges:
Currency derivatives	$	0.2	$	0.2	$	0.4	$	0.3
Interest rate swaps	7.9		5.3		—		—
Derivatives not designated as hedges:
Currency derivatives	—		—		0.1		0.4
Total derivatives	$	8.1	$	5.5	$	0.5	$	0.7

Schedule of Derivatives Designated as Hedges Affecting Net Earning and AOCI

The amounts associated with derivatives designated as hedges affecting Net earnings and Accumulated other comprehensive loss for the three months ended September 30 were as follows:

	Amount of gain (loss) recognized in Accumulated other comprehensive loss				Location of gain (loss) recognized in Net earnings	Amount of gain reclassified from Accumulated other comprehensive loss and recognized into Net earnings
In millions	2018		2017			2018		2017
Currency derivatives	$	—	$	0.6	Cost of goods sold	$	1.3	$	1.0
Interest rate swaps	1.5		0.3		Interest expense	0.6		—
Total	$	1.5	$	0.9		$	1.9	$	1.0

The amounts associated with derivatives designated as hedges affecting Net earnings and Accumulated other comprehensive loss for the nine months ended September 30 were as follows:

	Amount of gain (loss) recognized in Accumulated other comprehensive loss					Location of gain (loss) recognized in Net earnings	Amount of gain reclassified from Accumulated other comprehensive loss and recognized into Net earnings
In millions	2018		2017				2018		2017
Currency derivatives	$	2.2	$	2.2		Cost of goods sold	$	2.3	$	4.0
Interest rate swaps	4.1		(0.5		)	Interest expense	1.5		—
Total	$	6.3	$	1.7			$	3.8	$	4.0

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Pensions and Postretirement Benefits Other than Pensions (Tables)

9 Months Ended

Sep. 30, 2018

Pension Plans [Member]

Schedule of Net Periodic Benefit Cost

The components of the Company’s Net periodic pension benefit cost (income) for the three and nine months ended September 30 were as follows:

	U.S.
	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Service cost	$	1.7		$	1.7		$	5.2		$	5.3
Interest cost	2.6			2.7			7.7			7.8
Expected return on plan assets	(3.6		)	(3.0		)	(10.9		)	(8.9		)
Administrative costs and other	0.5			0.4			1.4			1.2
Net amortization of:
Prior service costs	—			—			0.2			0.2
Plan net actuarial losses	1.1			1.3			3.0			3.6
Net periodic pension benefit cost	$	2.3		$	3.1		$	6.6		$	9.2

	Non-U.S.
	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Service cost	$	0.4		$	0.3		$	1.4		$	1.1
Interest cost	2.2			2.1			6.4			6.4
Expected return on plan assets	(3.9		)	(3.4		)	(11.7		)	(10.3		)
Administrative costs and other	0.4			0.5			1.2			1.3
Amortization of plan net actuarial losses	0.3			0.4			0.7			1.3
Net periodic pension benefit income	$	(0.6	)	$	(0.1	)	$	(2.0	)	$	(0.2	)

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Fair Value Measurement (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring and Nonrecurring Basis

Assets and liabilities measured at fair value at December 31, 2017 were as follows:

	Fair value measurements						Total fair value
In millions	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Recurring fair value measurements
Assets:
Interest rate swaps	$	—	$	5.3	$	—	$	5.3
Foreign currency contracts	—		0.2		—		0.2
Total asset recurring fair value measurements	—		5.5		—		5.5
Liabilities:
Foreign currency contracts	—		0.7		—		0.7
Deferred compensation and other retirement plans	—		20.9		—		20.9
Total liability recurring fair value measurements	—		21.6		—		21.6
Financial instruments not carried at fair value
Total debt	—		1,485.2		—		1,485.2
Total financial instruments not carried at fair value	$	—	$	1,485.2	$	—	$	1,485.2

Assets and liabilities measured at fair value at September 30, 2018 were as follows:

	Fair value measurements						Total fair value
In millions	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Recurring fair value measurements
Assets:
Interest rate swaps	$	—	$	7.9	$	—	$	7.9
Foreign currency contracts	—		0.2		—		0.2
Total asset recurring fair value measurements	—		8.1		—		8.1
Liabilities:
Foreign currency contracts	—		0.5		—		0.5
Deferred compensation and other retirement plans	—		21.3		—		21.3
Total liability recurring fair value measurements	—		21.8		—		21.8
Financial instruments not carried at fair value
Total debt	—		1,403.1		—		1,403.1
Total financial instruments not carried at fair value	$	—	$	1,403.1	$	—	$	1,403.1

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Equity (Tables)

9 Months Ended

Sep. 30, 2018

Sep. 30, 2017

Stockholders' Equity Note [Abstract]

Reconciliation of Ordinary Shares

The reconciliation of Ordinary shares is as follows:

In millions	Total
December 31, 2017	95.1
Shares issued under incentive plans, net	0.4
Repurchase of ordinary shares	(0.4	)
September 30, 2018	95.1

Components Of Shareholders Equity Rollforward

The components of Equity for the nine months ended September 30, 2018 were as follows:

In millions	Allegion plc shareholders’ equity			Noncontrolling interests			Total equity
Balance at December 31, 2017	$	401.6		$	3.9		$	405.5
Net earnings	302.1			0.4			302.5
Currency translation	(42.2		)	(2.0		)	(44.2		)
Change in value of derivatives qualifying as cash flow hedges, net of tax	1.9			—			1.9
Pension and OPEB adjustments, net of tax	5.1			—			5.1
Total comprehensive income (loss)	266.9			(1.6		)	265.3
Share-based compensation	15.9			—			15.9
Dividends to noncontrolling interests	—			(0.2		)	(0.2		)
Dividends to ordinary shareholders	(59.9		)	—			(59.9		)
Repurchase of ordinary shares	(30.0		)	—			(30.0		)
Shares issued under incentive plans, net	2.4			—			2.4
Balance at September 30, 2018	$	596.9		$	2.1		$	599.0

The components of Equity for the nine months ended September 30, 2017 were as follows:

In millions	Allegion plc shareholders’ equity			Noncontrolling interests			Total equity
Balance at December 31, 2016	$	113.3		$	3.1		$	116.4
Net earnings	263.7			0.9			264.6
Currency translation	86.8			1.1			87.9
Change in value of derivatives qualifying as cash flow hedges, net of tax	(1.5		)	—			(1.5		)
Pension and OPEB adjustments, net of tax	(3.5		)	—			(3.5		)
Total comprehensive income	345.5			2.0			347.5
Cumulative effect of change in accounting principle	(5.0		)	—			(5.0		)
Share-based compensation	12.8			—			12.8
Dividends to noncontrolling interests	—			(0.1		)	(0.1		)
Dividends to ordinary shareholders	(45.6		)	—			(45.6		)
Repurchase of ordinary shares	(60.0		)	—			(60.0		)
Shares issued under incentive plans, net	6.2			—			6.2
Other	—			(0.1		)	(0.1		)
Balance at September 30, 2017	$	367.2		$	4.9		$	372.1

Schedule of Accumulated Other Comprehensive Income (Loss)

The changes in Accumulated other comprehensive loss for the nine months ended September 30, 2018 are as follows:

In millions	Cash flow hedges			Pension and OPEB Items			Foreign Currency Items			Total
December 31, 2017	$	3.8		$	(107.6	)	$	(49.1	)	$	(152.9	)
Other comprehensive income (loss) before reclassifications	6.3			2.4			(42.2		)	(33.5		)
Amounts reclassified from accumulated other comprehensive loss(a)	(3.8		)	3.3			—			(0.5		)
Tax expense	(0.7		)	(0.6		)	—			(1.3		)
September 30, 2018	$	5.6		$	(102.5	)	$	(91.3	)	$	(188.2	)

The changes in Accumulated other comprehensive loss for the nine months ended September 30, 2017 are as follows:

In millions	Cash flow hedges			Pension and OPEB Items			Foreign Currency Items			Total
December 31, 2016	$	3.4		$	(120.5	)	$	(147.2	)	$	(264.3	)
Other comprehensive income (loss) before reclassifications	1.8			(6.5		)	86.8			82.1
Amounts reclassified from accumulated other comprehensive loss(a)	(4.0		)	3.8			—			(0.2		)
Tax benefit (expense)	0.7			(0.8		)	—			(0.1		)
September 30, 2017	$	1.9		$	(124.0	)	$	(60.4	)	$	(182.5	)

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Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

Share-based Compensation [Abstract]

Share-Based Compensation Expense

The expenses recognized for the three and nine months ended September 30 were as follows:

	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Stock options	$	1.0		$	0.7		$	3.9		$	2.7
RSUs	2.6			1.7			8.1			5.9
PSUs	1.1			1.4			4.2			4.5
Deferred compensation	0.6			0.6			1.2			2.0
Pre-tax expense	5.3			4.4			17.4			15.1
Tax benefit	(1.0		)	(1.5		)	(1.9		)	(5.0		)
After-tax expense	$	4.3		$	2.9		$	15.5		$	10.1

Grants of Stock Options and RSUs

Grants issued during the nine months ended September 30 were as follows:

	2018			2017
	Number granted	Weighted- average fair value per award		Number granted	Weighted- average fair value per award
Stock options	160,849	$	21.29	165,113	$	18.22
RSUs	121,928	$	84.86	119,695	$	73.37

Average fair value of stock options, assumptions

The following assumptions were used during the nine months ended September 30:

	2018		2017
Dividend yield	0.97	%	0.89	%
Volatility	22.38	%	24.93	%
Risk-free rate of return	2.75	%	2.08	%
Expected life	6.0 years		6.0 years

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Restructuring Activities (Tables)

9 Months Ended

Sep. 30, 2018

Restructuring Charges [Abstract]

Schedule of Changes in Restructuring Reserve

The changes in the restructuring reserve during the nine months ended September 30, 2018 were as follows:

In millions	Total
December 31, 2017	$	4.2
Additions, net of reversals	4.1
Cash and non-cash uses	(5.2		)
Currency translation	(0.1		)
September 30, 2018	$	3.0

Costs accrued as of September 30, 2018 are expected to be paid within one year.

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Other, Net (Tables)

9 Months Ended

Sep. 30, 2018

Other Net [Abstract]

Other, Net

The components of Other income, net for the three and nine months ended September 30 were as follows:

	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Interest income	$	(0.4	)	$	(0.3	)	$	(0.7	)	$	(0.6	)
Foreign currency exchange (gain) loss	(0.8		)	(0.1		)	(1.0		)	0.4
Earnings from and gains on the sale of equity investments	—			(0.1		)	(0.1		)	(4.7		)
Net periodic pension and postretirement benefit (income) cost, less service cost	(0.7		)	1.0			(2.3		)	2.6
Other	—			(3.2		)	0.2			(3.3		)
Other income, net	$	(1.9	)	$	(2.7	)	$	(3.9	)	$	(5.6	)

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Earnings Per Share (EPS) (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share Basic and Diluted Shares

The following table summarizes the weighted-average number of ordinary shares outstanding for basic and diluted EPS calculations for the three and nine months ended September 30:

	Three months ended		Nine months ended
In millions	2018	2017	2018	2017
Weighted-average number of basic shares	95.1	95.0	95.1	95.2
Shares issuable under incentive stock plans	0.7	0.8	0.7	0.8
Weighted-average number of diluted shares	95.8	95.8	95.8	96.0

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Net Revenues (Tables)

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

Net revenues for tangible product sales and services by business segment for the three and nine months ended September 30, 2018 and 2017 are as follows:

	Three months ended September 30, 2018								Nine months ended September 30, 2018
in millions	Americas		EMEIA		Asia Pacific		Consolidated		Americas		EMEIA		Asia Pacific		Consolidated
Net revenues
Products	$	530.1	$	129.5	$	44.8	$	704.4	$	1,495.9	$	419.6	$	98.7	$	2,014.2
Services	—		4.9		2.2		7.1		—		12.9		2.2		15.1
Total Net Revenues	$	530.1	$	134.4	$	47.0	$	711.5	$	1,495.9	$	432.5	$	100.9	$	2,029.3

	Three months ended September 30, 2017(a)								Nine months ended September 30, 2017(a)
in millions	Americas		EMEIA		Asia Pacific		Consolidated		Americas		EMEIA		Asia Pacific		Consolidated
Net revenues
Products	$	455.2	$	120.6	$	29.1	$	604.9	$	1,331.4	$	360.2	$	81.0	$	1,772.6
Services	—		4.5		—		4.5		—		12.5		—		12.5
Total Net Revenues	$	455.2	$	125.1	$	29.1	$	609.4	$	1,331.4	$	372.7	$	81.0	$	1,785.1

(a) The Company adopted ASU 2014-09 and related updates as of January 1, 2018 on a modified retrospective basis, and as such, amounts presented for the three and nine months ended September 30, 2017 are based on ASC 605.

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Business Segment Information (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Summary of Operations by Reportable Segments

A summary of operations by reportable segment for the three and nine months ended September 30 was as follows:

	Three months ended						Nine months ended
In millions	2018			2017			2018			2017
Net revenues
Americas	$	530.1		$	455.2		$	1,495.9		$	1,331.4
EMEIA	134.4			125.1			432.5			372.7
Asia Pacific	47.0			29.1			100.9			81.0
Total	$	711.5		$	609.4		$	2,029.3		$	1,785.1
Segment operating income
Americas	$	153.8		$	133.2		$	415.5		$	383.6
EMEIA	7.6			8.6			27.3			23.1
Asia Pacific	1.5			2.2			0.8			5.1
Total	162.9			144.0			443.6			411.8
Reconciliation to Operating income
Unallocated corporate expense	(20.6		)	(16.9		)	(59.2		)	(50.2		)
Operating income	142.3			127.1			384.4			361.6
Reconciliation to earnings before income taxes
Interest expense	14.0			17.8			40.3			49.7
Other income, net	(1.9		)	(2.7		)	(3.9		)	(5.6		)
Earnings before income taxes	$	130.2		$	112.0		$	348.0		$	317.5

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Product Warranty Liability

The changes in the standard product warranty liability for the nine months ended September 30 were as follows:

In millions	2018			2017
Balance at beginning of period	$	14.1		$	13.3
Reductions for payments	(5.9		)	(5.5		)
Accruals for warranties issued during the current period	6.1			6.2
Changes to accruals related to preexisting warranties	(0.1		)	(0.7		)
Acquisitions	0.5			—
Translation	(0.1		)	0.4
Balance at end of period	$	14.6		$	13.7

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Guarantor Financial Information (Tables)

9 Months Ended

Sep. 30, 2018

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Condensed Statement of Comprehensive Income [Table Text Block]

Condensed and Consolidated Statement of Comprehensive Income

For the three months ended September 30, 2018

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net revenues	$	—		$	—		$	711.5		$	—		$	711.5
Cost of goods sold	—			—			402.1			—			402.1
Selling and administrative expenses	1.3			—			165.8			—			167.1
Operating income (loss)	(1.3		)	—			143.6			—			142.3
Equity earnings (loss) in affiliates, net of tax	124.5			73.2			—			(197.7		)	—
Interest expense	7.2			6.4			0.4			—			14.0
Intercompany interest and fees	—			26.3			(26.3		)	—			—
Other income, net	—			—			(1.9		)	—			(1.9		)
Earnings (loss) before income taxes	116.0			40.5			171.4			(197.7		)	130.2
Provision (benefit) for income taxes	—			(7.7		)	21.8			—			14.1
Net earnings (loss)	116.0			48.2			149.6			(197.7		)	116.1
Less: Net loss attributable to noncontrolling interests	—			—			0.1			—			0.1
Net earnings (loss) attributable to Allegion plc	$	116.0		$	48.2		$	149.5		$	(197.7	)	$	116.0
Total comprehensive income (loss)	$	103.9		$	48.1		$	142.5		$	(191.2	)	$	103.3
Less: Total comprehensive loss attributable to noncontrolling interests	—			—			(0.6		)	—			(0.6		)
Total comprehensive income (loss) attributable to Allegion plc	$	103.9		$	48.1		$	143.1		$	(191.2	)	$	103.9

Condensed and Consolidated Statement of Comprehensive Income

For the nine months ended September 30, 2018

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net revenues	$	—		$	—		$	2,029.3		$	—		$	2,029.3
Cost of goods sold	—			—			1,156.5			—			1,156.5
Selling and administrative expenses	4.6			—			483.8			—			488.4
Operating income (loss)	(4.6		)	—			389.0			—			384.4
Equity earnings (loss) in affiliates, net of tax	327.0			146.4			—			(473.4		)	—
Interest expense	20.3			19.4			0.6			—			40.3
Intercompany interest and fees	—			78.2			(78.2		)	—			—
Other income, net	—			—			(3.9		)	—			(3.9		)
Earnings (loss) before income taxes	302.1			48.8			470.5			(473.4		)	348.0
Provision (benefit) for income taxes	—			(20.0		)	65.5			—			45.5
Net earnings (loss)	302.1			68.8			405.0			(473.4		)	302.5
Less: Net earnings attributable to noncontrolling interests	—			—			0.4			—			0.4
Net earnings (loss) attributable to Allegion plc	$	302.1		$	68.8		$	404.6		$	(473.4	)	$	302.1
Total comprehensive income (loss)	$	266.9		$	70.7		$	365.8		$	(438.1	)	$	265.3
Less: Total comprehensive loss attributable to noncontrolling interests	—			—			(1.6		)	—			(1.6		)
Total comprehensive income (loss) attributable to Allegion plc	$	266.9		$	70.7		$	367.4		$	(438.1	)	$	266.9

Condensed and Consolidated Statement of Comprehensive Income

For the three months ended September 30, 2017

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net revenues	$	—		$	—		$	609.4		$	—		$	609.4
Cost of goods sold	—			—			335.0			—			335.0
Selling and administrative expenses	1.2			—			146.1			—			147.3
Operating income (loss)	(1.2		)	—			128.3			—			127.1
Equity earnings (loss) in affiliates, net of tax	104.2			(16.5		)	—			(87.7		)	—
Interest expense (income)	13.2			4.7			(0.1		)	—			17.8
Intercompany interest and fees	—			(75.2		)	75.2			—			—
Other income, net	—			—			(2.7		)	—			(2.7		)
Earnings (loss) before income taxes	89.8			54.0			55.9			(87.7		)	112.0
Provision (benefit) for income taxes	—			27.2			(5.3		)	—			21.9
Net earnings (loss)	89.8			26.8			61.2			(87.7		)	90.1
Less: Net earnings attributable to noncontrolling interests	—			—			0.3			—			0.3
Net earnings (loss) attributable to Allegion plc	$	89.8		$	26.8		$	60.9		$	(87.7	)	$	89.8
Total comprehensive income (loss)	$	111.9		$	27.1		$	84.0		$	(110.3	)	$	112.7
Less: Total comprehensive income attributable to noncontrolling interests	—			—			0.8			—			0.8
Total comprehensive income (loss) attributable to Allegion plc	$	111.9		$	27.1		$	83.2		$	(110.3	)	$	111.9

Condensed and Consolidated Statement of Comprehensive Income

For the nine months ended September 30, 2017

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net revenues	$	—		$	—		$	1,785.1		$	—		$	1,785.1
Cost of goods sold	—			—			988.2			—			988.2
Selling and administrative expenses	3.8			—			431.5			—			435.3
Operating income (loss)	(3.8		)	—			365.4			—			361.6
Equity earnings (loss) in affiliates, net of tax	302.8			53.5			0.6			(356.9		)	—
Interest expense	35.3			14.2			0.2			—			49.7
Intercompany interest and fees	—			(21.1		)	21.1			—			—
Other income, net	—			—			(5.6		)	—			(5.6		)
Earnings (loss) before income taxes	263.7			60.4			350.3			(356.9		)	317.5
Provision for income taxes	—			2.8			50.1			—			52.9
Net earnings (loss)	263.7			57.6			300.2			(356.9		)	264.6
Less: Net earnings attributable to noncontrolling interests	—			—			0.9			—			0.9
Net earnings (loss) attributable to Allegion plc	$	263.7		$	57.6		$	299.3		$	(356.9	)	$	263.7
Total comprehensive income (loss)	$	345.5		$	57.2		$	384.3		$	(439.5	)	$	347.5
Less: Total comprehensive income attributable to noncontrolling interests	—			—			2.0			—			2.0
Total comprehensive income (loss) attributable to Allegion plc	$	345.5		$	57.2		$	382.3		$	(439.5	)	$	345.5

Condensed Balance Sheet [Table Text Block]

Condensed and Consolidated Balance Sheet

September 30, 2018

In millions	Allegion plc		Allegion US Holding			Other Subsidiaries		Consolidating Adjustments			Total
Current assets:
Cash and cash equivalents	$	0.6	$	14.0		$	175.1	$	—		$	189.7
Restricted cash	—		—			6.8		—			6.8
Accounts and notes receivable, net	—		—			361.4		—			361.4
Inventories	—		—			278.3		—			278.3
Other current assets	0.8		24.7			20.2		(8.6		)	37.1
Accounts and notes receivable affiliates	—		473.6			342.8		(816.4		)	—
Total current assets	1.4		512.3			1,184.6		(825.0		)	873.3
Investment in affiliates	1,227.8		652.9			—		(1,880.7		)	—
Property, plant and equipment, net	—		—			273.3		—			273.3
Goodwill and other intangible assets, net	—		—			1,436.4		—			1,436.4
Notes receivable affiliates	25.5		1,483.7			2,613.8		(4,123.0		)	—
Other noncurrent assets	4.3		30.4			112.4		—			147.1
Total assets	$	1,259.0	$	2,679.3		$	5,620.5	$	(6,828.7	)	$	2,730.1
Current liabilities:
Accounts payable and accruals	$	1.8	$	13.5		$	445.2	$	(8.6	)	$	451.9
Short-term borrowings and current maturities of long-term debt	35.0		—			—		—			35.0
Accounts and notes payable affiliates	—		342.9			473.5		(816.4		)	—
Total current liabilities	36.8		356.4			918.7		(825.0		)	486.9
Long-term debt	624.2		792.5			1.0		—			1,417.7
Notes payable affiliate	—		2,613.8			1,509.2		(4,123.0		)	—
Other noncurrent liabilities	1.1		4.7			220.7		—			226.5
Total liabilities	662.1		3,767.4			2,649.6		(4,948.0		)	2,131.1
Equity:
Total shareholders equity (deficit)	596.9		(1,088.1		)	2,968.8		(1,880.7		)	596.9
Noncontrolling interests	—		—			2.1		—			2.1
Total equity (deficit)	596.9		(1,088.1		)	2,970.9		(1,880.7		)	599.0
Total liabilities and equity	$	1,259.0	$	2,679.3		$	5,620.5	$	(6,828.7	)	$	2,730.1

Condensed and Consolidated Balance Sheet

December 31, 2017

In millions	Allegion plc		Allegion US Holding			Other Subsidiaries		Consolidating Adjustments			Total
Current assets:
Cash and cash equivalents	$	0.7	$	0.3		$	465.2	$	—		$	466.2
Accounts and notes receivable, net	—		—			296.6		—			296.6
Inventories	—		—			239.8		—			239.8
Other current assets	0.3		56.3			17.6		(44.1		)	30.1
Accounts receivable affiliates	—		430.0			305.3		(735.3		)	—
Total current assets	1.0		486.6			1,324.5		(779.4		)	1,032.7
Investment in affiliates	1,079.6		240.8			—		(1,320.4		)	—
Property, plant and equipment, net	—		—			252.2		—			252.2
Goodwill and other intangible assets, net	—		—			1,155.5		—			1,155.5
Notes receivable affiliates	3.5		1,580.3			2,381.0		(3,964.8		)	—
Other noncurrent assets	5.1		5.5			91.0		—			101.6
Total assets	$	1,089.2	$	2,313.2		$	5,204.2	$	(6,064.6	)	$	2,542.0
Current liabilities:
Accounts payable and accruals	$	1.9	$	7.0		$	461.0	$	(44.1	)	$	425.8
Short-term borrowings and current maturities of long-term debt	35.0		—			—		—			35.0
Accounts and notes payable affiliates	0.2		304.9			430.2		(735.3		)	—
Total current liabilities	37.1		311.9			891.2		(779.4		)	460.8
Long-term debt	649.3		792.0			1.0		—			1,442.3
Notes payables affiliate	—		2,381.0			1,583.8		(3,964.8		)	—
Other noncurrent liabilities	1.2		4.2			228.0		—			233.4
Total liabilities	687.6		3,489.1			2,704.0		(4,744.2		)	2,136.5
Equity:
Total shareholders equity (deficit)	401.6		(1,175.9		)	2,496.3		(1,320.4		)	401.6
Noncontrolling interests	—		—			3.9		—			3.9
Total equity (deficit)	401.6		(1,175.9		)	2,500.2		(1,320.4		)	405.5
Total liabilities and equity	$	1,089.2	$	2,313.2		$	5,204.2	$	(6,064.6	)	$	2,542.0

Condensed Cash Flow Statement [Table Text Block]

Condensed and Consolidated Statement of Cash Flows

For the nine months ended September 30, 2018

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net cash provided by (used in) operating activities	$	135.4		$	(68.5	)	$	402.5		$	(209.0	)	$	260.4
Cash flows from investing activities:
Capital expenditures	—			—			(31.8		)	—			(31.8		)
Acquisition of and equity investments in businesses, net of cash acquired	—			(247.1		)	(128.7		)	—			(375.8		)
Other investing activities, net	—			—			(1.1		)	—			(1.1		)
Net cash used in investing activities	—			(247.1		)	(161.6		)	—			(408.7		)
Cash flows from financing activities:
Debt repayments, net	(26.3		)	—			(1.1		)	—			(27.4		)
Net inter-company proceeds (payments)	(22.0		)	329.3			(307.3		)	—			—
Dividends paid	—			—			(209.0		)	209.0			—
Dividends paid to shareholders	(59.6		)	—			—			—			(59.6		)
Repurchase of ordinary shares	(30.0		)	—			—			—			(30.0		)
Other financing activities, net	2.4			—			(2.3		)	—			0.1
Net cash (used in) provided by financing activities	(135.5		)	329.3			(519.7		)	209.0			(116.9		)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	—			—			(4.5		)	—			(4.5		)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(0.1		)	13.7			(283.3		)	—			(269.7		)
Cash, cash equivalents, and restricted cash - beginning of period	0.7			0.3			465.2			—			466.2
Cash, cash equivalents, and restricted cash - end of period	$	0.6		$	14.0		$	181.9		$	—		$	196.5

Condensed and Consolidated Statement of Cash Flows

For the nine months ended September 30, 2017

In millions	Allegion plc			Allegion US Holding			Other Subsidiaries			Consolidating Adjustments			Total
Net cash provided by (used in) operating activities	$	67.4		$	123.1		$	193.1		$	(213.6	)	$	170.0
Cash flows from investing activities:
Capital expenditures	—			—			(33.7		)	—			(33.7		)
Acquisition of businesses, net of cash acquired	—			—			(20.8		)	—			(20.8		)
Proceeds from sales and maturities of marketable securities	—			—			15.5			—			15.5
Other investing activities, net	—			—			2.9			—			2.9
Net cash used in investing activities	—			—			(36.1		)	—			(36.1		)
Cash flows from financing activities:
Debt repayments, net	(14.8		)	—			(1.3		)	—			(16.1		)
Debt issuance costs	(2.9		)	(0.1		)	—			—			(3.0		)
Net inter-company proceeds (payments)	50.3			(17.5		)	(32.8		)	—			—
Dividends paid	—			(105.5		)	(108.1		)	213.6			—
Dividends paid to shareholders	(45.6		)	—			—			—			(45.6		)
Repurchase of ordinary shares	(60.0		)	—			—			—			(60.0		)
Other financing activities, net	6.2			—			(0.2		)	—			6.0
Net cash (used in) provided by financing activities	(66.8		)	(123.1		)	(142.4		)	213.6			(118.7		)
Effect of exchange rate changes on cash and cash equivalents	—			—			7.3			—			7.3
Net increase in cash and cash equivalents	0.6			—			21.9			—			22.5
Cash and cash equivalents - beginning of period	0.5			0.2			311.7			—			312.4
Cash and cash equivalents - end of period	$	1.1		$	0.2		$	333.6		$	—		$	334.9

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Recent Accounting Pronouncements Tax reform impact (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions	$ 3.3
Deferred tax valuation allowance for interest deduction [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred Other Tax Expense (Benefit)		$ 22.8

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Inventories (Schedule of Major Classes of Inventory) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Inventory, Net [Abstract]
Inventory, Raw Materials, Net of Reserves	$ 60.5	$ 66.6
Inventory, Work in Process, Net of Reserves	25.7	29.8
Inventory, Finished Goods, Net of Reserves	192.1	143.4
Inventory, Net	$ 278.3	$ 239.8

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Goodwill (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, Gross		$ 1,246.7
Accumulated impairment		(485.5)
Goodwill	$ 878.0	761.2
Acquisitions	132.5
Currency translation	(15.7)
Americas [Member]
Goodwill [Roll Forward]
Goodwill, Gross		375.2
Accumulated impairment		0.0
Goodwill	482.9	375.2
Acquisitions	107.5
Currency translation	0.2
EMEIA [Member]
Goodwill [Roll Forward]
Goodwill, Gross		769.8
Accumulated impairment		(478.6)
Goodwill	290.8	291.2
Acquisitions	9.2
Currency translation	(9.6)
Asia Pacific [Member]
Goodwill [Roll Forward]
Goodwill, Gross		101.7
Accumulated impairment		(6.9)
Goodwill	104.3	$ 94.8
Acquisitions	15.8
Currency translation	$ (6.3)

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Intangible Assets (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Schedule of Acquired Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, gross	$ 579.6		$ 454.0
Accumulated amortization	(150.8)		(135.1)
Net finite-lived intangible assets	428.8		318.9
Trademarks (indefinite-lived)	59.0
Total intangible assets, gross	709.2		529.4
Intangible assets, net	558.4		394.3
Amortization of intangible assets	28.6	$ 16.4
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	34.4
Finite-Lived Intangible Assets, Amortization Expense, Year Two	28.7
Finite-Lived Intangible Assets, Amortization Expense, Year Three	28.7
Finite-Lived Intangible Assets, Amortization Expense, Year Four	28.7
Finite-Lived Intangible Assets, Amortization Expense, Year Five	28.7
Trademarks [Member]
Schedule of Acquired Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Trademarks (indefinite-lived)	129.6		75.4
Completed technologies/patents [Member]
Schedule of Acquired Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, gross	59.0		32.6
Accumulated amortization	(13.1)		(10.0)
Net finite-lived intangible assets	45.9		22.6
Customer relationships [Member]
Schedule of Acquired Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, gross	423.6		324.5
Accumulated amortization	(84.5)		(74.1)
Net finite-lived intangible assets	339.1		250.4
Trademarks [Member]
Schedule of Acquired Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, gross	87.9		89.0
Accumulated amortization	(47.1)		(46.1)
Net finite-lived intangible assets	40.8		42.9
Other Intangible Assets [Member]
Schedule of Acquired Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, gross	9.1		7.9
Accumulated amortization	(6.1)		(4.9)
Net finite-lived intangible assets	$ 3.0		$ 3.0

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Acquisition Acquisition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	$ 59.0		$ 59.0
Business Acquisition, Pro Forma Information, Description		1.5		8.3
Business Combination, Acquisition Related Costs	4.1	$ 1.2	8.6	$ 2.4
Gain (Loss) on Sale of Equity Investments				5.3
Proceeds from revolving facility			115.0	$ 165.0
Finite-Lived Customer Relationships, Gross	112.0		112.0
Other Finite-Lived Intangible Assets, Gross	33.0		33.0
Six Acquisitions [Domain]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired			368.0
Business Combination, Contingent Consideration, Liability	6.0		6.0
Equity Method Investments [Member]
Business Acquisition [Line Items]
Payments to Acquire Interest in Subsidiaries and Affiliates			8.0
Amortization of backlog revenue [Domain]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Information, Description				3.9
Order or Production Backlog [Member]
Business Acquisition [Line Items]
Other Finite-Lived Intangible Assets, Gross	6.0		$ 6.0
Proceeds from Revolving Facility to fund July 2018 acquisitions [Domain]
Business Acquisition [Line Items]
Proceeds from revolving facility	$ 75.0

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Acquisition Opening Balance Sheet (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill	$ 878.0	$ 761.2
Six Acquisitions [Domain]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	29.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	28.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	1.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	27.6
Goodwill	132.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	204.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	0.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	(11.1)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	(35.2)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	(4.7)
Business Combination, Consideration Transferred	$ 374.1

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Acquisition Pro forma table (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Business Combinations [Abstract]
Business Acquisition, Pro Forma Revenue	$ 711.5	$ 663.6	$ 2,071.8	$ 1,939.3
Business Acquisition, Pro Forma Net Income (Loss)	$ 119.3	$ 93.4	$ 313.1	$ 263.2
Business Acquisition, Pro Forma Earnings Per Share, Basic	$ 1.25	$ 0.98	$ 3.29	$ 2.76
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$ 1.25	$ 0.97	$ 3.27	$ 2.74

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Acquisition Net revenues and earnings before income taxes since acquisition (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Business Combinations [Abstract]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	$ 55.0	$ 115.0
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual	$ 0.9	$ (0.7)

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Debt and Credit Facilities (Summary of Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Other debt	$ 1.0	$ 1.0
Total borrowings outstanding	1,466.0	1,492.3
Less discounts and debt issuance costs, net	(13.3)	(15.0)
Total debt	1,452.7	1,477.3
Less current portion of long-term debt	35.0	35.0
Long-term debt	1,417.7	1,442.3
Unsecured Debt [Member] | Term Loan Facility Due 2022 [Member]
Debt Instrument [Line Items]
Long-term debt	665.0	691.3
Unsecured Debt [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	0.0	0.0
Senior Notes [Member] | 3.200% Senior Note due 2024 [Member]
Debt Instrument [Line Items]
Long-term debt	400.0	400.0
Senior Notes [Member] | 3.550% Senior Note due 2027 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 400.0	$ 400.0

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Debt and Credit Facilities (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Total borrowings outstanding	$ 1,466.0	$ 1,466.0		$ 1,492.3
Proceeds from Lines of Credit		$ 115.0	$ 165.0
Credit Facility Due 2022 [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	3.24%	3.24%
Unsecured Debt [Member] | 3.200% Senior Note due 2024 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 400.0	$ 400.0
Unsecured Debt [Member] | 3.550% Senior Note due 2027 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 400.0	$ 400.0
Senior Notes [Member] | 3.200% Senior Note due 2024 [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	3.20%	3.20%
Long-term debt	$ 400.0	$ 400.0		400.0
Senior Notes [Member] | 3.550% Senior Note due 2027 [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	3.55%	3.55%
Long-term debt	$ 400.0	$ 400.0		$ 400.0
Credit Facility Due 2022 [Member]
Debt Instrument [Line Items]
Unsecured Debt	$ 1,200.0	1,200.0
Debt Instrument, Basis Spread on Variable Rate	1.25%
Term Loan Facility Due 2022 [Member]
Debt Instrument [Line Items]
Unsecured Debt	$ 700.0	700.0
Repayments of Debt		26.3
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases	100.0	100.0
Long-term Line of Credit, Noncurrent	0.0	0.0
Line of credit facility, borrowing capacity	500.0	500.0
Letters of credit outstanding amount	$ 17.2	17.2
Minimum [Member] | Credit Facility Due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.125%
Maximum [Member] | Credit Facility Due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Derivative, Notional Amount	$ 250.0	$ 250.0
12/31/17 through 12/31/20 [Domain] | Term Loan Facility Due 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayment Terms	0.0125
3/31/21 through 9/22/22 [Domain] | Term Loan Facility Due 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayment Terms	0.025

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Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Deferred gain/loss, net of tax, included in accumulated other comprehensive income (AOCI) related to the fair value of the Company's currency derivatives designated as accounting hedges	$ (188.2)	$ (152.9)
Forward Contracts [Member] | Designated as Hedging Instrument [Member]
Derivative, Notional Amount	74.2	57.7
Deferred gain/loss, net of tax, included in accumulated other comprehensive income (AOCI) related to the fair value of the Company's currency derivatives designated as accounting hedges	0.3	0.3
Currency derivatives expected to be reclassified into earnings over the next twelve months	0.3
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative, Notional Amount	250.0
Deferred gain/loss, net of tax, included in accumulated other comprehensive income (AOCI) related to the fair value of the Company's currency derivatives designated as accounting hedges	5.4	$ 3.5
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ 2.0

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Financial Instruments (Schedule of the Fair Values of Derivative Instruments) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative asset fair value	$ 8.1	$ 5.5
Derivative liability fair value	0.5	0.7
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as hedges, asset at fair value	0.2	0.2
Derivatives designated as hedges, liability at fair value	0.4	0.3
Interest Rate Derivative Assets, at Fair Value	7.9	5.3
Interest Rate Derivative Liabilities, at Fair Value	0.0	0.0
Nondesignated [Member]
Derivatives, Fair Value [Line Items]
Derivatives not designated as hedges, asset at fair value	0.0	0.0
Derivatives not designated as hedges, liability at fair value	$ 0.1	$ 0.4

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Financial Instruments (Schedule of Derivatives Designated as Hedges Affecting Condensed Consolidated Income Statement and Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income	$ 1.5	$ 0.9	$ 6.3	$ 1.7
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income	1.9	1.0	3.8	4.0
Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income	0.0	0.6	2.2	2.2
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income	1.5	0.3	4.1	(0.5)
Cost of Goods Sold [Member] | Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income	1.3	1.0	2.3	4.0
Interest Expense [Member] | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income	$ 0.6	$ 0.0	$ 1.5	$ 0.0

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Pensions and Postretirement Benefits Other than Pensions (Narrative) (Details) - Pension Plans [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Company contributions	$ 6.6	$ 56.0
Additional contributions expected during the remainder of the year	$ 4.0
Voluntary pension contribution [Domain]
Company contributions		$ 50.0

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Pensions and Postretirement Benefits Other than Pensions (Components of the Company's Pension-Related Costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
UNITED STATES
Service cost	$ 1.7	$ 1.7	$ 5.2	$ 5.3
Interest cost	2.6	2.7	7.7	7.8
Expected return on plan assets	(3.6)	(3.0)	(10.9)	(8.9)
Administrative costs and other	0.5	0.4	1.4	1.2
Prior service costs	0.0	0.0	0.2	0.2
Amortization of plan net actuarial losses	1.1	1.3	3.0	3.6
Net periodic pension benefit cost	2.3	3.1	6.6	9.2
Non-U.S.
Service cost	0.4	0.3	1.4	1.1
Interest cost	2.2	2.1	6.4	6.4
Expected return on plan assets	(3.9)	(3.4)	(11.7)	(10.3)
Administrative costs and other	0.4	0.5	1.2	1.3
Amortization of plan net actuarial losses	0.3	0.4	0.7	1.3
Net periodic pension benefit cost	$ (0.6)	$ (0.1)	$ (2.0)	$ (0.2)

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Fair Value Measurement (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Assets, fair value measurements [Abstract]
Derivative instruments	$ 8.1	$ 5.5
Liabilities, fair value measurements [Abstract]
Foreign currency contracts	0.5	0.7
Recurring fair value measurements [Member]
Assets, fair value measurements [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0.2	0.2
Interest Rate Derivative Assets, at Fair Value	7.9	5.3
Total assets, fair value measurements	8.1	5.5
Liabilities, fair value measurements [Abstract]
Foreign Currency Contracts, Liability, Fair Value Disclosure	0.5	0.7
Deferred Compensation Liability, Current and Noncurrent	21.3	20.9
Total liability, fair value measurements	21.8	21.6
Total debt	1,403.1	1,485.2
Total financial instruments not carried at fair value	1,403.1	1,485.2
Recurring fair value measurements [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets, fair value measurements [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0.0	0.0
Interest Rate Derivative Assets, at Fair Value	0.0	0.0
Total assets, fair value measurements	0.0	0.0
Liabilities, fair value measurements [Abstract]
Foreign Currency Contracts, Liability, Fair Value Disclosure	0.0	0.0
Deferred Compensation Liability, Current and Noncurrent	0.0	0.0
Total liability, fair value measurements	0.0	0.0
Total debt	0.0	0.0
Total financial instruments not carried at fair value	0.0	0.0
Recurring fair value measurements [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets, fair value measurements [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0.2	0.2
Interest Rate Derivative Assets, at Fair Value	7.9	5.3
Total assets, fair value measurements	8.1	5.5
Liabilities, fair value measurements [Abstract]
Foreign Currency Contracts, Liability, Fair Value Disclosure	0.5	0.7
Deferred Compensation Liability, Current and Noncurrent	21.3	20.9
Total liability, fair value measurements	21.8	21.6
Total debt	1,403.1	1,485.2
Total financial instruments not carried at fair value	1,403.1	1,485.2
Recurring fair value measurements [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets, fair value measurements [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0.0	0.0
Interest Rate Derivative Assets, at Fair Value	0.0	0.0
Total assets, fair value measurements	0.0	0.0
Liabilities, fair value measurements [Abstract]
Foreign Currency Contracts, Liability, Fair Value Disclosure	0.0	0.0
Deferred Compensation Liability, Current and Noncurrent	0.0	0.0
Total liability, fair value measurements	0.0	0.0
Total debt	0.0	0.0
Total financial instruments not carried at fair value	$ 0.0	$ 0.0

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Equity (Reconciliation of Ordinary Shares) (Details) - shares shares in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Increase (Decrease) In Ordinary Shares [Roll Forward]
Stock Repurchased During Period, Shares	0.4
Common Stock [Member]
Increase (Decrease) In Ordinary Shares [Roll Forward]
December 31, 2017	95.1	95.1
Shares issued under incentive plans, net	0.4
Treasury Stock, Shares, Acquired	(0.4)

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Equity (Components of Shareholders' Equity) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Noncontrolling interests	$ 2.1		$ 2.1		$ 3.9
Stockholders' Equity Attributable to Parent	596.9		596.9		401.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at December 31:			405.5	$ 116.4
Net earnings (loss)	(116.1)	$ (90.1)	(302.5)	(264.6)
Net earnings attributable to Allegion plc	116.0	89.8	302.1	263.7
Less: Net loss attributable to noncontrolling interests	0.1	0.3	0.4	0.9
Currency translation			44.2	(87.9)
Other Comprehensive Income Unrealized Holding Gain Loss On Securities And Derivatives Arising During Period Net Of Tax			1.9	(1.5)
Pension and OPEB adjustments, net of tax			5.1	(3.5)
Total comprehensive income	103.3	112.7	265.3	347.5
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification				(5.0)
Share-based compensation			15.9	12.8
Dividends to noncontrolling interests			0.2	0.1
Dividends to ordinary shareholders			(59.9)	(45.6)
Payments for Repurchase of Common Stock			30.0	60.0
Shares issued under incentive plans, net			2.4	6.2
Other				(0.1)
Balance at September 30:	599.0	372.1	599.0	372.1
Shareholders' Equity [Member]
Stockholders' Equity Attributable to Parent	596.9	367.2	596.9	367.2	$ 401.6	$ 113.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings attributable to Allegion plc			302.1	263.7
Currency translation			42.2	(86.8)
Other Comprehensive Income Unrealized Holding Gain Loss On Securities And Derivatives Arising During Period Net Of Tax			1.9	(1.5)
Pension and OPEB adjustments, net of tax			5.1	(3.5)
Total comprehensive income				345.5
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent			266.9
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification				(5.0)
Share-based compensation			15.9	12.8
Dividends to noncontrolling interests			0.0	0.0
Dividends to ordinary shareholders			59.9	(45.6)
Payments for Repurchase of Common Stock				60.0
Shares issued under incentive plans, net			2.4	6.2
Other				0.0
Noncontrolling Interest [Member]
Noncontrolling interests	$ 2.1	$ 4.9	2.1	4.9		$ 3.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Less: Net loss attributable to noncontrolling interests			0.4	(0.9)
Currency translation			(2.0)	(1.1)
Other Comprehensive Income Unrealized Holding Gain Loss On Securities And Derivatives Arising During Period Net Of Tax			0.0	0.0
Pension and OPEB adjustments, net of tax			0.0	0.0
Total comprehensive income				2.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest			(1.6)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification				0.0
Share-based compensation			0.0	0.0
Dividends to noncontrolling interests			0.2	0.1
Dividends to ordinary shareholders			0.0	0.0
Payments for Repurchase of Common Stock			0.0	0.0
Shares issued under incentive plans, net			$ 0.0	0.0
Other				$ (0.1)

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Equity (Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at December 31:	$ (152.9)
Balance at September 30:	(188.2)
Cash flow hedges and marketable securities [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at December 31:	3.8	$ 3.4
Other comprehensive income before reclassifications	6.3	1.8
Amounts reclassified from accumulated other comprehensive income	(3.8)	(4.0)
Tax (expense) benefit	(0.7)	0.7
Balance at September 30:	5.6	1.9
Pension and OPEB Adjustments [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at December 31:	(107.6)	(120.5)
Other comprehensive income before reclassifications	2.4	(6.5)
Amounts reclassified from accumulated other comprehensive income	3.3	3.8
Tax (expense) benefit	(0.6)	(0.8)
Balance at September 30:	(102.5)	(124.0)
Foreign Currency Gain (Loss) [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at December 31:	(49.1)	(147.2)
Other comprehensive income before reclassifications	(42.2)	86.8
Amounts reclassified from accumulated other comprehensive income	0.0	0.0
Tax (expense) benefit	0.0	0.0
Balance at September 30:	(91.3)	(60.4)
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance at December 31:	(152.9)	(264.3)
Other comprehensive income before reclassifications	(33.5)	82.1
Amounts reclassified from accumulated other comprehensive income	(0.5)	(0.2)
Tax (expense) benefit	(1.3)	(0.1)
Balance at September 30:	$ (188.2)	$ (182.5)

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Share-Based Compensation (Narrative) (Details)	9 Months Ended
	Sep. 30, 2018
Performance Shares [Member]
Maximum award level for eligible employees (in shares)	0.1

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Share-Based Compensation (Share-Based Compensation Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share based compensation expense	$ 5.3	$ 4.4	$ 17.4	$ 15.1
Tax benefit	(1.0)	(1.5)	(1.9)	(5.0)
After-tax expense	4.3	2.9	15.5	10.1
Employee Stock Option [Member]
Share based compensation expense	1.0	0.7	3.9	2.7
Restricted Stock Units (RSUs) [Member]
Share based compensation expense	2.6	1.7	8.1	5.9
Performance Shares [Member]
Share based compensation expense	1.1	1.4	4.2	4.5
Deferred Compensation [Member]
Share based compensation expense	$ 0.6	$ 0.6	$ 1.2	$ 2.0

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Share-Based Compensation (Grants of Stock Options and RSUs) (Details) - $ / shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Restricted Stock [Member]
Equity awards, granted, in shares	121,928	119,695
Weighted average fair value per award, in dollars per share	$ 84.86	$ 73.37
Employee Stock Option [Member]
Equity awards, granted, in shares	160,849	165,113
Weighted average fair value per award, in dollars per share	$ 21.29	$ 18.22

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Share-Based Compensation (Average Fair Value of Stock Options Granted, Assumptions) (Details)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation [Abstract]
Dividend yield	0.97%	0.89%
Volatility	22.38%	24.93%
Risk-free rate of return	2.75%	2.08%
Expected life, in years	6 years	6 years

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Restructuring Activities (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring Charges [Abstract]
Restructuring charges	$ 2.7	$ 7.4	$ 4.1	$ 8.5

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Restructuring Activities (Schedule of Changes in Restructuring Reserve) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Current	$ 3.0		$ 3.0		$ 4.2
Additions	$ 2.7	$ 7.4	4.1	$ 8.5
Cash and non-cash uses			(5.2)
Restructuring Reserve, Translation Adjustment			$ (0.1)

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Other, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other Net [Abstract]
Nonoperating gain relating to a legal entity liquidation				2.9
Interest income	$ (0.4)	$ (0.3)	$ (0.7)	$ (0.6)
Exchange gain (loss)	(0.8)	(0.1)	(1.0)	0.4
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	0.0	(0.1)	(0.1)	(4.7)
Pension and Other Postretirement Benefits Cost (Reversal of Cost)	(0.7)	1.0	(2.3)	2.6
Other	0.0	(3.2)	0.2	(3.3)
Other income, net	$ (1.9)	$ (2.7)	$ (3.9)	(5.6)
Gain (Loss) on Sale of Equity Investments				$ 5.3

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Income Taxes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Effective income tax rate (percent)	10.80%	19.60%	13.10%	16.70%

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Earnings Per Share (EPS) (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Weighted-average number of basic shares	95.1	95.0	95.1	95.2
Shares issuable under incentive stock plans	0.7	0.8	0.7	0.8
Weighted average number of diluted shares	95.8	95.8	95.8	96.0

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Earnings Per Share (EPS) (Narrative) (Details) shares in Millions	9 Months Ended
	Sep. 30, 2018 shares
Earnings Per Share (EPS) (Narrative) [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0.1

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Net Revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Net revenues	$ 711.5	$ 609.4	$ 2,029.3	$ 1,785.1
Americas [Member]
Segment Reporting Information [Line Items]
Net revenues	530.1	455.2	1,495.9	1,331.4
EMEIA [Member]
Segment Reporting Information [Line Items]
Net revenues	134.4	125.1	432.5	372.7
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net revenues	47.0	29.1	100.9	81.0
Product [Member]
Segment Reporting Information [Line Items]
Net revenues	704.4	604.9	2,014.2	1,772.6
Product [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Net revenues	530.1	455.2	1,495.9	1,331.4
Product [Member] | EMEIA [Member]
Segment Reporting Information [Line Items]
Net revenues	129.5	120.6	419.6	360.2
Product [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net revenues	44.8	29.1	98.7	81.0
Services [Member]
Segment Reporting Information [Line Items]
Net revenues	7.1	4.5	15.1	12.5
Services [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Net revenues	0.0	0.0	0.0	0.0
Services [Member] | EMEIA [Member]
Segment Reporting Information [Line Items]
Net revenues	4.9	4.5	12.9	12.5
Services [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net revenues	$ 2.2	$ 0.0	$ 2.2	$ 0.0

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Business Segment Information (Summary of Operations by Reportable Segments) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net revenues	$ 711.5	$ 609.4	$ 2,029.3	$ 1,785.1
Segment operating income	162.9	144.0	443.6	411.8
Operating income	142.3	127.1	384.4	361.6
Interest expense	14.0	17.8	40.3	49.7
Other income, net	1.9	2.7	3.9	5.6
Earnings before income taxes	130.2	112.0	348.0	317.5
Americas [Member]
Net revenues	530.1	455.2	1,495.9	1,331.4
Segment operating income	153.8	133.2	415.5	383.6
EMEIA [Member]
Net revenues	134.4	125.1	432.5	372.7
Segment operating income	7.6	8.6	27.3	23.1
Asia Pacific [Member]
Net revenues	47.0	29.1	100.9	81.0
Segment operating income	1.5	2.2	0.8	5.1
Corporate, Non-Segment [Member]
Unallocated corporate expense	$ (20.6)	$ (16.9)	$ (59.2)	$ (50.2)

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Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Expense for environmental remediation	$ 0.4	$ 0.5	$ 1.7	$ 2.0
Reserves for environmental matters	24.1		24.1		$ 28.9
Reserves for environmental matters, current	6.4		6.4		12.6
Segment, Discontinued Operations [Member]
Reserves for environmental matters	$ 6.7		$ 6.7		$ 8.9

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Commitments and Contingencies (Product Warranty Liability) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 14.1	$ 13.3
Reductions for payments	(5.9)	(5.5)
Accruals for warranties issued during the current period	6.1	6.2
Changes to accruals related to preexisting warranties	(0.1)	(0.7)
Standard and Extended Product Warranty Accrual, Additions from Business Acquisition	0.5	0.0
Translation	(0.1)	0.4
Balance at end of period	$ 14.6	$ 13.7

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Guarantor Financial Information (Statement of Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Guarantor Obligations [Line Items]
Net revenues	$ 711.5	$ 609.4	$ 2,029.3	$ 1,785.1
Cost of goods sold	(402.1)	(335.0)	(1,156.5)	(988.2)
Selling and administrative expenses	(167.1)	(147.3)	(488.4)	(435.3)
Operating income	142.3	127.1	384.4	361.6
Income (Loss) from Equity Method Investments	0.0	0.0	0.0	0.0
Interest expense	(14.0)	(17.8)	(40.3)	(49.7)
Intercompany interest and fees	0.0	0.0	0.0	0.0
Other income, net	(1.9)	(2.7)	(3.9)	(5.6)
Earnings before income taxes	130.2	112.0	348.0	317.5
Income Tax Expense (Benefit)	14.1	21.9	45.5	52.9
Net earnings	116.1	90.1	302.5	264.6
Less: Net earnings attributable to noncontrolling interests	(0.1)	(0.3)	(0.4)	(0.9)
Net Income (Loss) Attributable to Parent	116.0	89.8	302.1	263.7
Total comprehensive income	103.3	112.7	265.3	347.5
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	(0.6)	0.8	(1.6)	2.0
Total comprehensive income attributable to Allegion plc	103.9	111.9	266.9	345.5
Allegion plc
Guarantor Obligations [Line Items]
Net revenues	0.0	0.0	0.0	0.0
Cost of goods sold	0.0	0.0	0.0	0.0
Selling and administrative expenses	(1.3)	(1.2)	(4.6)	(3.8)
Operating income	(1.3)	(1.2)	(4.6)	(3.8)
Income (Loss) from Equity Method Investments	124.5	104.2	327.0	302.8
Interest expense	(7.2)	(13.2)	(20.3)	(35.3)
Intercompany interest and fees	0.0	0.0	0.0	0.0
Other income, net	0.0	0.0	0.0	0.0
Earnings before income taxes	116.0	89.8	302.1	263.7
Income Tax Expense (Benefit)	0.0	0.0	0.0	0.0
Net earnings	116.0	89.8	302.1	263.7
Less: Net earnings attributable to noncontrolling interests	0.0	0.0	0.0	0.0
Net Income (Loss) Attributable to Parent	116.0	89.8	302.1	263.7
Total comprehensive income	103.9	111.9	266.9	345.5
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	0.0	0.0	0.0	0.0
Total comprehensive income attributable to Allegion plc	103.9	111.9	266.9	345.5
Allegion US Holding
Guarantor Obligations [Line Items]
Net revenues	0.0	0.0	0.0	0.0
Cost of goods sold	0.0	0.0	0.0	0.0
Selling and administrative expenses	0.0	0.0	0.0	0.0
Operating income	0.0	0.0	0.0	0.0
Income (Loss) from Equity Method Investments	73.2	(16.5)	146.4	53.5
Interest expense	(6.4)	(4.7)	(19.4)	(14.2)
Intercompany interest and fees	26.3	(75.2)	78.2	(21.1)
Other income, net	0.0	0.0	0.0	0.0
Earnings before income taxes	40.5	54.0	48.8	60.4
Income Tax Expense (Benefit)	(7.7)	27.2	(20.0)	2.8
Net earnings	48.2	26.8	68.8	57.6
Less: Net earnings attributable to noncontrolling interests	0.0	0.0	0.0	0.0
Net Income (Loss) Attributable to Parent	48.2	26.8	68.8	57.6
Total comprehensive income	48.1	27.1	70.7	57.2
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	0.0	0.0	0.0	0.0
Total comprehensive income attributable to Allegion plc	48.1	27.1	70.7	57.2
Other Subsidiaries
Guarantor Obligations [Line Items]
Net revenues	711.5	609.4	2,029.3	1,785.1
Cost of goods sold	(402.1)	(335.0)	(1,156.5)	(988.2)
Selling and administrative expenses	(165.8)	(146.1)	(483.8)	(431.5)
Operating income	143.6	128.3	389.0	365.4
Income (Loss) from Equity Method Investments	0.0	0.0	0.0	0.6
Interest expense	(0.4)	(0.1)	(0.6)	(0.2)
Intercompany interest and fees	(26.3)	75.2	(78.2)	21.1
Other income, net	(1.9)	(2.7)	(3.9)	(5.6)
Earnings before income taxes	171.4	55.9	470.5	350.3
Income Tax Expense (Benefit)	21.8	(5.3)	65.5	50.1
Net earnings	149.6	61.2	405.0	300.2
Less: Net earnings attributable to noncontrolling interests	(0.1)	(0.3)	(0.4)	(0.9)
Net Income (Loss) Attributable to Parent	149.5	60.9	404.6	299.3
Total comprehensive income	142.5	84.0	365.8	384.3
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	(0.6)	0.8	(1.6)	2.0
Total comprehensive income attributable to Allegion plc	143.1	83.2	367.4	382.3
Consolidating Adjustments
Guarantor Obligations [Line Items]
Net revenues	0.0	0.0	0.0	0.0
Cost of goods sold	0.0	0.0	0.0	0.0
Selling and administrative expenses	0.0	0.0	0.0	0.0
Operating income	0.0	0.0	0.0	0.0
Income (Loss) from Equity Method Investments	(197.7)	(87.7)	(473.4)	(356.9)
Interest expense	0.0	0.0	0.0	0.0
Intercompany interest and fees	0.0	0.0	0.0	0.0
Other income, net	0.0	0.0	0.0	0.0
Earnings before income taxes	(197.7)	(87.7)	(473.4)	(356.9)
Income Tax Expense (Benefit)	0.0	0.0	0.0	0.0
Net earnings	(197.7)	(87.7)	(473.4)	(356.9)
Less: Net earnings attributable to noncontrolling interests	0.0	0.0	0.0	0.0
Net Income (Loss) Attributable to Parent	(197.7)	(87.7)	(473.4)	(356.9)
Total comprehensive income	(191.2)	(110.3)	(438.1)	(439.5)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	0.0	0.0	0.0	0.0
Total comprehensive income attributable to Allegion plc	$ (191.2)	$ (110.3)	$ (438.1)	$ (439.5)

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Guarantor Financial Information (Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 189.7	$ 466.2
Restricted Cash, Current	6.8	0.0
Accounts and notes receivable, net	361.4	296.6
Inventories	278.3	239.8
Other current assets	37.1	30.1
Accounts and notes receivable affiliates	0.0	0.0
Total current assets	873.3	1,032.7
Investment in affiliates	0.0	0.0
Property, plant and equipment, net	273.3	252.2
Goodwill and other intangible assets, net	1,436.4	1,155.5
Notes receivable affiliates	0.0	0.0
Other noncurrent assets	147.1	101.6
Total assets	2,730.1	2,542.0
Current liabilities:
Accounts payable and accruals	451.9	425.8
Short-term borrowings and current maturities of long-term debt	35.0	35.0
Accounts and notes payable affiliates	0.0	0.0
Total current liabilities	486.9	460.8
Long-term debt	1,417.7	1,442.3
Notes payable affiliate	0.0	0.0
Other noncurrent liabilities	226.5	233.4
Total liabilities	2,131.1	2,136.5
Equity:
Stockholders' Equity Attributable to Parent	596.9	401.6
Noncontrolling interests	2.1	3.9
Total equity (deficit)	599.0	405.5	$ 372.1	$ 116.4
Total liabilities and equity	2,730.1	2,542.0
Allegion plc
Current assets:
Cash and cash equivalents	0.6	0.7
Restricted Cash, Current	0.0
Accounts and notes receivable, net	0.0	0.0
Inventories	0.0	0.0
Other current assets	0.8	0.3
Accounts and notes receivable affiliates	0.0	0.0
Total current assets	1.4	1.0
Investment in affiliates	1,227.8	1,079.6
Property, plant and equipment, net	0.0	0.0
Goodwill and other intangible assets, net	0.0	0.0
Notes receivable affiliates	25.5	3.5
Other noncurrent assets	4.3	5.1
Total assets	1,259.0	1,089.2
Current liabilities:
Accounts payable and accruals	1.8	1.9
Short-term borrowings and current maturities of long-term debt	35.0	35.0
Accounts and notes payable affiliates	0.0	0.2
Total current liabilities	36.8	37.1
Long-term debt	624.2	649.3
Notes payable affiliate	0.0	0.0
Other noncurrent liabilities	1.1	1.2
Total liabilities	662.1	687.6
Equity:
Stockholders' Equity Attributable to Parent	596.9	401.6
Noncontrolling interests	0.0	0.0
Total equity (deficit)	596.9	401.6
Total liabilities and equity	1,259.0	1,089.2
Allegion US Holding
Current assets:
Cash and cash equivalents	14.0	0.3
Restricted Cash, Current	0.0
Accounts and notes receivable, net	0.0	0.0
Inventories	0.0	0.0
Other current assets	24.7	56.3
Accounts and notes receivable affiliates	473.6	430.0
Total current assets	512.3	486.6
Investment in affiliates	652.9	240.8
Property, plant and equipment, net	0.0	0.0
Goodwill and other intangible assets, net	0.0	0.0
Notes receivable affiliates	1,483.7	1,580.3
Other noncurrent assets	30.4	5.5
Total assets	2,679.3	2,313.2
Current liabilities:
Accounts payable and accruals	13.5	7.0
Short-term borrowings and current maturities of long-term debt	0.0	0.0
Accounts and notes payable affiliates	342.9	304.9
Total current liabilities	356.4	311.9
Long-term debt	792.5	792.0
Notes payable affiliate	2,613.8	2,381.0
Other noncurrent liabilities	4.7	4.2
Total liabilities	3,767.4	3,489.1
Equity:
Stockholders' Equity Attributable to Parent	(1,088.1)	(1,175.9)
Noncontrolling interests	0.0	0.0
Total equity (deficit)	(1,088.1)	(1,175.9)
Total liabilities and equity	2,679.3	2,313.2
Consolidating Adjustments
Current assets:
Cash and cash equivalents	0.0	0.0
Restricted Cash, Current	0.0
Accounts and notes receivable, net	0.0	0.0
Inventories	0.0	0.0
Other current assets	(8.6)	(44.1)
Accounts and notes receivable affiliates	(816.4)	(735.3)
Total current assets	(825.0)	(779.4)
Investment in affiliates	(1,880.7)	(1,320.4)
Property, plant and equipment, net	0.0	0.0
Goodwill and other intangible assets, net	0.0	0.0
Notes receivable affiliates	(4,123.0)	(3,964.8)
Other noncurrent assets	0.0	0.0
Total assets	(6,828.7)	(6,064.6)
Current liabilities:
Accounts payable and accruals	(8.6)	(44.1)
Short-term borrowings and current maturities of long-term debt	0.0	0.0
Accounts and notes payable affiliates	(816.4)	(735.3)
Total current liabilities	(825.0)	(779.4)
Long-term debt	0.0	0.0
Notes payable affiliate	(4,123.0)	(3,964.8)
Other noncurrent liabilities	0.0	0.0
Total liabilities	(4,948.0)	(4,744.2)
Equity:
Stockholders' Equity Attributable to Parent	(1,880.7)	(1,320.4)
Noncontrolling interests	0.0	0.0
Total equity (deficit)	(1,880.7)	(1,320.4)
Total liabilities and equity	(6,828.7)	(6,064.6)
Other Subsidiaries
Current assets:
Cash and cash equivalents	175.1	465.2
Restricted Cash, Current	6.8
Accounts and notes receivable, net	361.4	296.6
Inventories	278.3	239.8
Other current assets	20.2	17.6
Accounts and notes receivable affiliates	342.8	305.3
Total current assets	1,184.6	1,324.5
Investment in affiliates	0.0	0.0
Property, plant and equipment, net	273.3	252.2
Goodwill and other intangible assets, net	1,436.4	1,155.5
Notes receivable affiliates	2,613.8	2,381.0
Other noncurrent assets	112.4	91.0
Total assets	5,620.5	5,204.2
Current liabilities:
Accounts payable and accruals	445.2	461.0
Short-term borrowings and current maturities of long-term debt	0.0	0.0
Accounts and notes payable affiliates	473.5	430.2
Total current liabilities	918.7	891.2
Long-term debt	1.0	1.0
Notes payable affiliate	1,509.2	1,583.8
Other noncurrent liabilities	220.7	228.0
Total liabilities	2,649.6	2,704.0
Equity:
Stockholders' Equity Attributable to Parent	2,968.8	2,496.3
Noncontrolling interests	2.1	3.9
Total equity (deficit)	2,970.9	2,500.2
Total liabilities and equity	$ 5,620.5	$ 5,204.2

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Guarantor Financial Information (Statement of Cash Flow) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	$ 260.4	$ 170.0
Cash flows from investing activities:
Capital expenditures	(31.8)	(33.7)
Acquisition of and equity investments in businesses, net of cash acquired	(375.8)	(20.8)
Proceeds from Sale and Maturity of Marketable Securities		15.5
Other investing activities, net	(1.1)	2.9
Net cash used in investing activities	(408.7)	(36.1)
Cash flows from financing activities:
Debt repayments, net	(27.4)	(16.1)
Payments of Debt Issuance Costs	0.0	3.0
Net inter-company proceeds (payments)	0.0	0.0
Dividends paid	0.0	0.0
Dividends paid to ordinary shareholders	(59.6)	(45.6)
Repurchase of ordinary shares	(30.0)	(60.0)
Other financing activities, net	0.1	6.0
Net cash used in financing activities	(116.9)	(118.7)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(4.5)	7.3
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(269.7)	22.5
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	196.5	334.9	$ 466.2	$ 312.4
Allegion plc
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	135.4	67.4
Cash flows from investing activities:
Capital expenditures	0.0	0.0
Acquisition of and equity investments in businesses, net of cash acquired	0.0	0.0
Proceeds from Sale and Maturity of Marketable Securities		0.0
Other investing activities, net	0.0	0.0
Net cash used in investing activities	0.0	0.0
Cash flows from financing activities:
Debt repayments, net	(26.3)	(14.8)
Payments of Debt Issuance Costs		2.9
Net inter-company proceeds (payments)	(22.0)	50.3
Dividends paid	0.0	0.0
Dividends paid to ordinary shareholders	(59.6)	(45.6)
Repurchase of ordinary shares	(30.0)	(60.0)
Other financing activities, net	2.4	6.2
Net cash used in financing activities	(135.5)	(66.8)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	0.0	0.0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(0.1)	0.6
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	0.6	1.1	0.7	0.5
Allegion US Holding
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	(68.5)	123.1
Cash flows from investing activities:
Capital expenditures	0.0	0.0
Acquisition of and equity investments in businesses, net of cash acquired	(247.1)	0.0
Proceeds from Sale and Maturity of Marketable Securities		0.0
Other investing activities, net	0.0	0.0
Net cash used in investing activities	(247.1)	0.0
Cash flows from financing activities:
Debt repayments, net	0.0	0.0
Payments of Debt Issuance Costs		0.1
Net inter-company proceeds (payments)	329.3	(17.5)
Dividends paid	0.0	(105.5)
Dividends paid to ordinary shareholders	0.0	0.0
Repurchase of ordinary shares	0.0	0.0
Other financing activities, net	0.0	0.0
Net cash used in financing activities	329.3	(123.1)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	0.0	0.0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	13.7	0.0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	14.0	0.2	0.3	0.2
Consolidating Adjustments
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	(209.0)	(213.6)
Cash flows from investing activities:
Capital expenditures	0.0	0.0
Acquisition of and equity investments in businesses, net of cash acquired	0.0	0.0
Proceeds from Sale and Maturity of Marketable Securities		0.0
Other investing activities, net	0.0	0.0
Net cash used in investing activities	0.0	0.0
Cash flows from financing activities:
Debt repayments, net	0.0	0.0
Payments of Debt Issuance Costs		0.0
Net inter-company proceeds (payments)	0.0	0.0
Dividends paid	209.0	213.6
Dividends paid to ordinary shareholders	0.0	0.0
Repurchase of ordinary shares	0.0	0.0
Other financing activities, net	0.0	0.0
Net cash used in financing activities	209.0	213.6
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	0.0	0.0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	0.0	0.0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	0.0	0.0	0.0	0.0
Other Subsidiaries
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	402.5	193.1
Cash flows from investing activities:
Capital expenditures	(31.8)	(33.7)
Acquisition of and equity investments in businesses, net of cash acquired	(128.7)	(20.8)
Proceeds from Sale and Maturity of Marketable Securities		15.5
Other investing activities, net	(1.1)	2.9
Net cash used in investing activities	(161.6)	(36.1)
Cash flows from financing activities:
Debt repayments, net	(1.1)	(1.3)
Payments of Debt Issuance Costs		0.0
Net inter-company proceeds (payments)	(307.3)	(32.8)
Dividends paid	(209.0)	(108.1)
Dividends paid to ordinary shareholders	0.0	0.0
Repurchase of ordinary shares	0.0	0.0
Other financing activities, net	(2.3)	(0.2)
Net cash used in financing activities	(519.7)	(142.4)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(4.5)	7.3
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(283.3)	21.9
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 181.9	$ 333.6	$ 465.2	$ 311.7