Moog (MOG-A) 10-Q 27 Apr 18 2018 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	6 Months Ended
	Mar. 31, 2018	Apr. 24, 2018	Apr. 02, 2017
Document Information
Entity Registrant Name	MOOG INC.
Entity Central Index Key	67,887
Current Fiscal Year End Date	--09-29
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 2,212,000,000
Class A Common Stock
Document Information
Entity Common Stock, Shares Outstanding		32,441,477
Entity Listing, Par Value Per Share	$ 1
Class B Common Stock
Document Information
Entity Common Stock, Shares Outstanding		3,321,143
Entity Listing, Par Value Per Share	$ 1

Consolidated Condensed Statemen

Consolidated Condensed Statements of Earnings - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Income Statement [Abstract]
Net sales	$ 689,049	$ 632,403	$ 1,316,584	$ 1,222,073
Cost of sales	489,071	447,323	932,497	864,487
Inventory write-down - restructuring	7,329	0	7,329	0
Gross profit	192,649	185,080	376,758	357,586
Research and development	34,085	36,950	66,505	71,514
Selling, general and administrative	99,999	87,064	195,949	172,127
Interest	9,089	8,649	17,735	17,135
Restructuring	24,058	0	24,058	0
Other	(251)	4,214	(992)	12,119
Earnings before income taxes	25,669	48,203	73,503	84,691
Income taxes	11,704	16,541	58,239	22,971
Net earnings attributable to Moog and noncontrolling interest	13,965	31,662	15,264	61,720
Net earnings (loss) attributable to noncontrolling interest	0	(364)	0	(870)
Net earnings attributable to Moog	$ 13,965	$ 32,026	$ 15,264	$ 62,590
Net earnings per share attributable to Moog
Basic	$ 0.39	$ 0.89	$ 0.43	$ 1.74
Diluted	0.39	0.88	0.42	1.73
Dividends declared per share	$ 0.25	$ 0	$ 0.25	$ 0
Average common shares outstanding
Basic	35,770,089	35,888,053	35,771,247	35,878,552
Diluted	36,179,858	36,236,838	36,190,455	36,254,802

Consolidated Condensed Stateme3

Consolidated Condensed Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Statement of Comprehensive Income [Abstract]
Net earnings attributable to Moog and noncontrolling interest	$ 13,965	$ 31,662	$ 15,264	$ 61,720
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	20,297	12,695	30,661	(28,814)
Retirement liability adjustment	4,682	5,471	8,938	14,043
Change in accumulated income (loss) on derivatives	(579)	1,246	655	1,820
Other comprehensive income (loss), net of tax	24,400	19,412	40,254	(12,951)
Tax Cuts and Jobs Act, reclassification from AOCIL to retained earnings	(47,077)	0	(47,077)	0
Comprehensive income (loss)	(8,712)	51,074	8,441	48,769
Comprehensive income (loss) attributable to noncontrolling interest	0	(364)	0	(870)
Comprehensive income (loss) attributable to Moog	$ (8,712)	$ 51,438	$ 8,441	$ 49,639

Consolidated Condensed Balance

Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Current assets
Cash and cash equivalents	$ 255,536	$ 368,073
Receivables	770,731	727,740
Inventories	517,999	489,127
Prepaid expense and other current assets	41,996	41,499
Total current assets	1,586,262	1,626,439
Property, plant and equipment, net of accumulated depreciation	547,141	522,991
Goodwill	804,652	774,268
Intangible assets, net	114,056	108,818
Deferred income taxes	12,637	26,558
Other assets	38,009	31,518
Total assets	3,102,757	3,090,592
Current liabilities
Short-term borrowings	94	89
Current installments of long-term debt	238	295
Accounts payable	190,631	170,878
Accrued compensation	137,848	148,406
Customer advances	166,390	159,274
Contract loss reserves	42,971	43,214
Other accrued liabilities	130,736	107,278
Total current liabilities	668,908	629,434
Long-term debt, excluding current installments	907,429	956,653
Long-term pension and retirement obligations	189,923	271,272
Deferred income taxes	43,218	13,320
Other long-term liabilities	37,575	5,609
Total liabilities	1,847,053	1,876,288
Commitments and contingencies (Note 18)	0	0
Shareholders' equity
Additional paid-in capital	490,055	492,246
Retained earnings	1,901,182	1,847,819
Treasury shares	(739,091)	(739,157)
Accumulated other comprehensive loss	(342,314)	(335,491)
Total Moog shareholders' equity	1,255,704	1,214,304
Total liabilities and shareholders' equity	3,102,757	3,090,592
Class A Common Stock
Shareholders' equity
Common stock	43,736	43,704
Class B Common Stock
Shareholders' equity
Common stock	7,544	7,576
Stock Employee Compensation Trust (SECT)
Shareholders' equity
Common stock issued to trust	(93,330)	(89,919)
Total Moog shareholders' equity	(93,330)	(89,919)
Supplemental Retirement Plan (SERP) Trust
Shareholders' equity
Common stock issued to trust	(12,078)	(12,474)
Total Moog shareholders' equity	$ (12,078)	$ (12,474)

Consolidated Condensed Balance5

Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Statement of Financial Position [Abstract]
Property, plant and equipment, accumulated depreciation	$ 811,595	$ 771,160

Consolidated Condensed Stateme6

Consolidated Condensed Statements of Shareholders' Equity Statement - 6 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock At Cost	Stock Employee Compensation Trust (SECT)	Supplemental Retirement Plan (SERP) Trust	Accumulated Other Comprehensive Loss	Class A Common Stock	Class A Common StockTreasury Stock At Cost	Class A Common StockStock Employee Compensation Trust (SECT)	Class B Common Stock	Class B Common StockTreasury Stock At Cost	Class B Common StockStock Employee Compensation Trust (SECT)	Class B Common StockSupplemental Retirement Plan (SERP) Trust
Beginning of period, Amount at Sep. 30, 2017	$ 1,214,304	$ 51,280	$ 492,246	$ 1,847,819	$ (739,157)	$ (89,919)	$ (12,474)	$ (335,491)
Increase (Decrease) in Stockholders' Equity
Issuance of shares			(2,733)		5,184
Equity-based compensation expense			3,500
Adjustment to market - SECT, SERP and other			(2,958)
Net earnings attributable to Moog	15,264			15,264
Dividends				(8,978)
Tax Cuts and Jobs Act, reclassification from AOCIL to retained earnings	(47,077)			47,077				(47,077)
Class A and B shares purchased					(5,118)
Issuance of shares - SECT						1,941
Purchase of shares - SECT	(7,914)					(7,914)
Adjustment to market						2,562	396
Other comprehensive income (loss)	40,254							40,254
End of period, Amount at Mar. 31, 2018	$ 1,255,704	$ 51,280	$ 490,055	$ 1,901,182	$ (739,091)	$ (93,330)	$ (12,078)	$ (342,314)
Beginning of period - Common Stock at Sep. 30, 2017									43,704,286			7,575,427
Increase (Decrease) in Stockholders' Equity
Conversion of Class B to Class A									31,272			(31,272)
End of period - Common Stock at Mar. 31, 2018									43,735,558			7,544,155
Beginning of period, Shares at Sep. 30, 2017										(10,933,003)	(425,148)		(3,333,927)	(654,753)	(150,000)
Increase (Decrease) in Stockholders' Equity
Class A and B shares issued related to equity compensation, shares										79,679			28,239
Class A and B shares purchased, shares										(37,784)			(22,165)
Issuance of shares - SECT											0			21,871
Purchase of shares - SECT											0			(91,081)
End of period, Shares at Mar. 31, 2018										(10,891,108)	(425,148)		(3,327,853)	(723,963)	(150,000)
Increase (Decrease) in Stockholders' Equity
Common stock outstanding, shares									32,419,302			3,342,339

Consolidated Condensed Stateme7

Consolidated Condensed Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings attributable to Moog and noncontrolling interest	$ 15,264	$ 61,720
Adjustments to reconcile net earnings to net cash provided (used) by operating activities:
Depreciation	35,536	35,372
Amortization	9,425	9,325
Deferred income taxes	30,709	423
Equity-based compensation expense	3,500	3,154
Impairment of long-lived assets and inventory write-down associated with restructuring	21,811	0
Other	2,960	15,481
Changes in assets and liabilities providing (using) cash:
Receivables	(30,111)	(20,989)
Inventories	(20,685)	14,327
Accounts payable	11,351	13,536
Customer advances	5,547	8,869
Accrued expenses	10,558	449
Accrued income taxes	4,953	(858)
Net pension and post retirement liabilities	(70,309)	(9,413)
Other assets and liabilities	14,721	(9,690)
Net cash provided by operating activities	45,230	121,706
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisitions of businesses, net of cash acquired	(42,116)	0
Purchase of property, plant and equipment	(43,924)	(30,210)
Other investing transactions	(3,781)	(928)
Net cash (used) by investing activities	(89,821)	(31,138)
CASH FLOWS FROM FINANCING ACTIVITIES
Net short-term repayments	0	(1,280)
Proceeds from revolving lines of credit	209,500	94,145
Payments on revolving lines of credit	(269,610)	(143,700)
Proceeds from long-term debt	10,000	0
Payments on long-term debt	(20,614)	(97)
Proceeds from sale of treasury stock	2,451	2,135
Purchase of outstanding shares for treasury	(5,118)	(5,305)
Proceeds from sale of stock held by SECT	1,941	867
Purchase of stock held by SECT	(7,914)	(7,038)
Other financing transactions	0	(1,656)
Net cash (used) by financing activities	(79,364)	(61,929)
Effect of exchange rate changes on cash	11,418	(11,278)
Increase (decrease) in cash and cash equivalents	(112,537)	17,361
Cash and cash equivalents at beginning of period	368,073	325,128
Cash and cash equivalents at end of period	$ 255,536	$ 342,489

Basis Of Presentation

Basis Of Presentation	6 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated condensed financial statements have been prepared by management in accordance with U.S. generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. In the opinion of management, all adjustments consisting of normal recurring adjustments considered necessary for the fair presentation of results for the interim period have been included. The results of operations for the three and six months ended March 31, 2018 are not necessarily indicative of the results expected for the full year. The accompanying unaudited consolidated condensed financial statements should be read in conjunction with the financial statements and notes thereto included in our Form 10-K for the fiscal year ended September 30, 2017 . All references to years in these financial statements are to fiscal years. Certain prior year amounts have been reclassified to conform to current year's presentation. During 2018, we made a change to our segment reporting structure and merged our former Components segment into Space and Defense Controls and Industrial Systems. The Goodwill and Segment footnotes have been restated to reflect these changes. Recent Accounting Pronouncements Adopted Standard Description Financial Statement Effect or Other Significant Matters ASU no. 2018-02 Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income The standard amends existing guidance and allows a reclassification from accumulated other comprehensive income (loss) to retained earnings for stranded deferred tax effects resulting from the Tax Cuts and Jobs Act. The standard requires certain disclosures about stranded deferred tax effects. The provisions of the standard are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. We adopted this standard recording the related stranded deferred tax effects in the period of adoption, resulting in $47,077 being reclassified from accumulated other comprehensive income (loss) to retained earnings as of March 31, 2018. Date early adopted: Q2 2018 Recent Accounting Pronouncements Not Yet Adopted Standard Description Financial Statement Effect or Other Significant Matters ASU no. 2014-09 Revenue from Contracts with Customers (and All Related ASUs) The standard requires revenue recognition to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard also requires additional disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts. The provisions of the standard, as well as all subsequently issued clarifications to the standard, are effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. The standard can be adopted using either a full retrospective or modified retrospective approach. We plan to adopt the standard using the modified retrospective method, under which prior years' results are not restated, but supplemental information will be provided in our disclosures that will present fiscal 2019 results before adoption of the standard. In addition, a cumulative adjustment will be necessary to Shareholder's Equity at the beginning of fiscal 2019. We are assessing the impact of the standard on our financial statements and related disclosures, internal controls and financial policies and information technology systems. We have not yet quantified the impact on our financial statements and related disclosures. Planned date of adoption: Q1 2019 ASU no. 2016-01 Recognition and Measurement of Financial Assets and Financial Liabilities The standard requires most equity investments to be measured at fair value, with subsequent changes in fair value recognized in net income. The amendment also impacts the measurement of financial liabilities under the fair value option as well as certain presentation and disclosure requirements for financial instruments. The provisions of the standard are effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted for some, but not all, provisions. The amendment requires certain provisions to be applied prospectively and others to be applied by means of a cumulative-effect adjustment. We are currently evaluating the effect on our financial statements and related disclosures. Planned date of adoption: Q1 2019 ASU no. 2016-02 Leases (and All Related ASUs) The standard requires most lease arrangements to be recognized in the balance sheet as lease assets and lease liabilities. The standard also requires additional disclosures about the leasing arrangements. The provisions of the standard are effective for fiscal years beginning after December 15, 2018 and interim periods within those years. Early adoption is permitted. We are currently evaluating the effect on our financial statements and related disclosures. Planned date of adoption: Q1 2020 ASU no. 2017-07 Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost The standard amends existing guidance on the presentation of net periodic benefit cost in the income statement and what qualifies for capitalization on the balance sheet. The provisions of the standard are effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted as of the beginning of an annual period. The amendment requires income statement presentation provisions to be applied retrospectively and capitalization in assets provisions to be applied prospectively. We are currently evaluating the effect on our financial statements and related disclosures. Planned date of adoption: Q1 2019 ASU no. 2017-12 Targeted Improvements to Accounting for Hedging Activities The standard expands the hedging strategies eligible for hedge accounting, while simplifying presentation and disclosure by eliminating separate measurement and reporting of hedge ineffectiveness. The provisions of the standard are effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the effect on our financial statements and related disclosures. Planned date of adoption: Q1 2020 We consider the applicability and impact of all ASUs. ASUs not listed above were assessed and determined to be either not applicable, or had or are expected to have minimal impact on our financial statements and related disclosures.

Acquisitions, Divestitures and

Acquisitions, Divestitures and Equity Method Investments	6 Months Ended
	Mar. 31, 2018
Business Combinations [Abstract]
Acquisitions, Divestitures and Equity Method Investments	Acquisitions, Divestitures and Equity Method Investments On March 29, 2018, we acquired VUES Brno s.r.o, located in the Czech Republic and Germany, for a purchase price, net of acquired cash, of $62,683 , consisting of $42,110 in cash and $20,573 of assumed debt. VUES designs and manufactures customized electric motors, generators and solutions. This operation is included in our Industrial Systems segment. The purchase price allocation is subject to adjustments as we obtain additional information for our estimates during the measurement period. On October 3, 2017, we, in collaboration with SIA Engineering Company, announced the joint venture company, Moog Aircraft Services Asia ("MASA"), in Singapore, of which we currently hold a 51% ownership. MASA is intended to provide maintenance, repair and overhaul services for our manufactured flight control systems. As we hold a majority ownership in MASA, but share voting control, we are accounting for this investment using the equity method. At March 31, 2018 , we have made total contributions of $3,570 and intend to make one additional contribution of $1,530 during 2018 . This operation is included in our Aircraft Controls segment. In 2017, we sold non-core businesses of our Space and Defense Controls segment for $7,210 in cash and recorded losses in other expense of $13,119 related to the sales. On April 2, 2017, we acquired Rotary Transfer Systems, a manufacturer of electromechanical systems, located in Germany and France for a purchase price, net of acquired cash, of $42,593 , consisting of $40,545 in cash and $2,048 in assumed pension obligations. This operation is included in our Industrial Systems segment.

Receivables

Receivables	6 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Receivables	Receivables Receivables consist of: March 31, September 30, Accounts receivable $ 296,761 $ 286,773 Long-term contract receivables: Amounts billed 153,489 148,087 Unbilled recoverable costs and accrued profits 291,256 282,154 Total long-term contract receivables 444,745 430,241 Other 34,191 15,077 Total receivables 775,697 732,091 Less allowance for doubtful accounts (4,966 ) (4,351 ) Receivables $ 770,731 $ 727,740 We securitize certain trade receivables in transactions that are accounted for as secured borrowings (Securitization Program). We maintain a subordinated interest in a portion of the pool of trade receivables that are securitized. The retained interest, which is included in Receivables in the consolidated condensed balance sheets, is recorded at fair value, which approximates the total amount of the designated pool of accounts receivable. Refer to Note 6, Indebtedness, for additional disclosures related to the Securitization Program.

Inventories

Inventories	6 Months Ended
	Mar. 31, 2018
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories, net of reserves, consist of: March 31, September 30, Raw materials and purchased parts $ 189,317 $ 189,517 Work in progress 254,059 229,202 Finished goods 74,623 70,408 Inventories $ 517,999 $ 489,127 There are no material inventoried costs relating to long-term contracts where revenue is accounted for using the percentage of completion, cost-to-cost method of accounting as of March 31, 2018 or September 30, 2017 .

Goodwill And Intangible Assets

Goodwill And Intangible Assets	6 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill And Intangible Assets	Goodwill and Intangible Assets The changes in the carrying amount of goodwill are as follows: Aircraft Space and Industrial Total Balance at September 30, 2017 $ 181,375 $ 259,951 $ 332,942 $ 774,268 Acquisition — — 23,026 23,026 Foreign currency translation 2,558 332 4,468 7,358 Balance at March 31, 2018 $ 183,933 $ 260,283 $ 360,436 $ 804,652 In 2018, we changed our segment reporting structure as our former Components segment was separated and merged into Space and Defense Controls and Industrial Systems. As a result, the September 30, 2017 balances for those segments were restated to reflect this change. Goodwill for Space and Defense Controls and Industrial Systems increased by $86,995 and $224,194 , respectively, than what was previously reported. Goodwill in our Space and Defense Controls segment is net of a $4,800 accumulated impairment loss at March 31, 2018 . Goodwill in our Medical Devices reporting unit, included in our Industrial Systems segment, is net of a $38,200 accumulated impairment loss at March 31, 2018 . The gross carrying amounts, accumulated amortization and amortization expense in the disclosures below reflect the write off of intangible assets as of March 31, 2018 that relate to restructuring actions taken in our Industrial Systems segment. Refer to Note 11, Restructuring, for additional disclosures. The components of intangible assets are as follows: March 31, 2018 September 30, 2017 Weighted- Gross Carrying Accumulated Gross Carrying Accumulated Customer-related 11 $ 147,256 $ (96,394 ) $ 175,872 $ (128,019 ) Technology-related 9 71,442 (50,665 ) 71,924 (55,069 ) Program-related 19 69,020 (34,007 ) 66,458 (30,675 ) Marketing-related 8 25,135 (18,642 ) 26,552 (19,251 ) Other 10 4,563 (3,652 ) 4,379 (3,353 ) Intangible assets 12 $ 317,416 $ (203,360 ) $ 345,185 $ (236,367 ) Substantially all acquired intangible assets other than goodwill are being amortized. Customer-related intangible assets primarily consist of customer relationships. Technology-related intangible assets primarily consist of technology, patents, intellectual property and software. Program-related intangible assets consist of long-term programs represented by current contracts and probable follow on work. Marketing-related intangible assets primarily consist of trademarks, trade names and non-compete agreements. Amortization of acquired intangible assets was $4,671 and $9,271 for the three and six months ended March 31, 2018 and $4,723 and $9,200 for the three and six months ended April 1, 2017 . Based on acquired intangible assets recorded at March 31, 2018 , amortization is expected to be approximately $17,400 in 2018 , $15,100 in 2019 , $12,900 in 2020 , $10,500 in 2021 and $8,900 in 2022 .

Indebtedness

Indebtedness	6 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Indebtedness	Indebtedness We maintain short-term line of credit facilities with banks throughout the world that are principally demand lines subject to revision by the banks. Long-term debt consists of: March 31, September 30, U.S. revolving credit facility $ 480,000 $ 540,110 Senior notes 300,000 300,000 Securitization program 130,000 120,000 Obligations under capital leases 238 306 Senior debt 910,238 960,416 Less deferred debt issuance cost (2,571 ) (3,468 ) Less current installments (238 ) (295 ) Long-term debt $ 907,429 $ 956,653 Our U.S. revolving credit facility matures on June 28, 2021 . Our U.S. revolving credit facility has a capacity of $1,100,000 and provides an expansion option, which permits us to request an increase of up to $200,000 to the credit facility upon satisfaction of certain conditions. The credit facility is secured by substantially all of our U.S. assets. The loan agreement contains various covenants which, among others, specify interest coverage and maximum leverage. We are in compliance with all covenants. At March 31, 2018 , we had $300,000 aggregate principal amount of 5.25% senior notes due December 1, 2022 with interest paid semiannually on June 1 and December 1 of each year. The senior notes are unsecured obligations, guaranteed on a senior unsecured basis by certain subsidiaries and contain normal incurrence-based covenants and limitations such as the ability to incur additional indebtedness, pay dividends, make other restricted payments and investments, create liens and certain corporate acts such as mergers and consolidations. The Securitization Program was extended on October 23, 2017 and now matures on October 23, 2019 . The Securitization Program provides up to $130,000 of borrowing capacity. Under the Securitization Program, we sell certain trade receivables and related rights to an affiliate, which in turn sells an undivided variable percentage ownership interest in the trade receivables to a financial institution, while maintaining a subordinated interest in a portion of the pool of trade receivables. Interest for the Securitization Program is based on 30-day LIBOR plus an applicable margin. A commitment fee is also charged based on a percentage of the unused amounts available and is not material . The agreement governing the Securitization Program contains restrictions and covenants which include limitations on the making of certain restricted payments, creation of certain liens, and certain corporate acts such as mergers, consolidations and sale of substantially all assets. The Securitization Program has a minimum borrowing requirement equal to the lesser of either 80% of our borrowing capacity or 100% of our borrowing base, which is a subset of the trade receivables sold under this agreement. As of March 31, 2018 , our minimum borrowing requirement was $104,000 .

Product Warranties

Product Warranties	6 Months Ended
	Mar. 31, 2018
Product Warranties Disclosures [Abstract]
Product Warranties	Product Warranties In the ordinary course of business, we warrant our products against defects in design, materials and workmanship typically over periods ranging from twelve to sixty months. We determine warranty reserves needed by product line based on historical experience and current facts and circumstances. Activity in the warranty accrual is summarized as follows: Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, Warranty accrual at beginning of period $ 27,748 $ 22,883 $ 25,848 $ 21,363 Warranties issued during current period 3,280 4,741 8,037 8,155 Adjustments to pre-existing warranties (175 ) (106 ) (245 ) (371 ) Reductions for settling warranties (3,007 ) (4,419 ) (5,922 ) (5,463 ) Foreign currency translation 409 173 537 (412 ) Warranty accrual at end of period $ 28,255 $ 23,272 $ 28,255 $ 23,272

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedges, Assets [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments We principally use derivative financial instruments to manage interest rate risk associated with long-term debt and foreign exchange risk related to foreign operations and foreign currency transactions. We enter into derivative financial instruments with a number of major financial institutions to minimize counterparty credit risk. Derivatives designated as hedging instruments Interest rate swaps are used to adjust the proportion of total debt that is subject to variable and fixed interest rates. The interest rate swaps are designated as hedges of the amount of future cash flows related to interest payments on variable-rate debt that, in combination with the interest payments on the debt, convert a portion of the variable-rate debt to fixed-rate debt. At March 31, 2018 , we had interest rate swaps with notional amounts totaling $150,000 . The interest rate swaps effectively convert this amount of variable-rate debt to fixed-rate debt at 2.62% , including the applicable margin of 1.38% as of March 31, 2018 . The interest will revert back to variable rates based on LIBOR plus the applicable margin upon the maturity of the interest rate swaps. These interest rate swaps mature at various times through June 23, 2020 . We use foreign currency contracts as cash flow hedges to effectively fix the exchange rates on future payments and revenue. To mitigate exposure in movements between various currencies, including the Philippine peso and the British pound, we had outstanding foreign currency forwards with notional amounts of $49,153 at March 31, 2018 . These contracts mature at various times through February 28, 2020 . We use forward currency contracts to hedge our net investment in certain foreign subsidiaries. To mitigate the exposure in foreign currencies, we had an outstanding net investment hedge in Euro, with a notional amount of $28,722 at March 31, 2018 , maturing in our third quarter of 2018. These interest rate swaps, foreign currency contracts and net investment hedges are recorded in the consolidated condensed balance sheets at fair value and the related gains or losses are deferred in shareholders’ equity as a component of Accumulated Other Comprehensive Income (Loss) (AOCIL). These deferred gains and losses are reclassified into the consolidated condensed statements of earnings, as necessary, during the periods in which the related payments or receipts affect earnings. However, to the extent the interest rate swaps and foreign currency contracts are not perfectly effective in offsetting the change in the value of the payments and revenue being hedged, the ineffective portion of these contracts is recognized in earnings immediately. Ineffectiveness was not material in the first six months of 2018 or 2017 . Derivatives not designated as hedging instruments We also have foreign currency exposure on balances, primarily intercompany, that are denominated in foreign currencies and are adjusted to current values using period-end exchange rates. The resulting gains or losses are recorded in the consolidated condensed statements of earnings. To minimize foreign currency exposure, we had foreign currency contracts with notional amounts of $78,648 at March 31, 2018 . The foreign currency contracts are recorded in the consolidated condensed balance sheets at fair value and resulting gains or losses are recorded in the consolidated condensed statements of earnings. We recorded the following gains or losses on foreign currency contracts which are included in other income or expense and generally offset the gains or losses from the foreign currency adjustments on the intercompany balances that are also included in other income or expense: Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, Net gain (loss) $ (2,381 ) $ (493 ) $ (3,009 ) $ 901 Summary of derivatives The fair value and classification of derivatives is summarized as follows: March 31, September 30, Derivatives designated as hedging instruments: Foreign currency contracts Other current assets $ 228 $ 551 Foreign currency contracts Other assets 11 50 Interest rate swaps Other current assets 1,412 552 Interest rate swaps Other assets 592 314 Net investment hedge Other current assets 240 — Total asset derivatives $ 2,483 $ 1,467 Foreign currency contracts Other accrued liabilities $ 1,355 $ 1,434 Foreign currency contracts Other long-term liabilities 494 244 Interest rate swaps Other accrued liabilities — 10 Interest rate swaps Other long-term liabilities — 15 Total liability derivatives $ 1,849 $ 1,703 Derivatives not designated as hedging instruments: Foreign currency contracts Other current assets $ 101 $ 95 Foreign currency contracts Other accrued liabilities $ 469 $ 383

Fair Value

Fair Value	6 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value	Fair Value Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Depending on the nature of the asset or liability, various techniques and assumptions can be used to estimate fair value. The definition of the fair value hierarchy is as follows: Level 1 – Quoted prices in active markets for identical assets and liabilities. Level 2 – Observable inputs other than quoted prices in active markets for similar assets and liabilities. Level 3 – Inputs for which significant valuation assumptions are unobservable in a market and therefore value is based on the best available data, some of which is internally developed and considers risk premiums that a market participant would require. Our derivatives are valued using various pricing models or discounted cash flow analyses that incorporate observable market data, such as interest rate yield curves and currency rates, and are classified as Level 2 within the valuation hierarchy. The following table presents the fair values and classification of our financial assets and liabilities measured on a recurring basis, all of which are classified as Level 2. Classification March 31, September 30, Foreign currency contracts Other current assets $ 329 $ 646 Foreign currency contracts Other assets 11 50 Interest rate swaps Other current assets 1,412 552 Interest rate swaps Other assets 592 314 Net investment hedge Other current assets 240 — Total assets $ 2,584 $ 1,562 Foreign currency contracts Other accrued liabilities $ 1,824 $ 1,817 Foreign currency contracts Other long-term liabilities 494 244 Interest rate swaps Other accrued liabilities — 10 Interest rate swaps Other long-term liabilities — 15 Total liabilities $ 2,318 $ 2,086 Our only financial instrument for which the carrying value differs from its fair value is long-term debt. At March 31, 2018 , the fair value of long-term debt was $917,738 compared to its carrying value of $910,238 . The fair value of long-term debt is classified as Level 2 within the fair value hierarchy and was estimated based on quoted market prices.

Employee Benefit Plans

Employee Benefit Plans	6 Months Ended
	Mar. 31, 2018
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]
Employee Benefit Plans	Employee Benefit Plans Net periodic benefit costs for our defined benefit pension plans are as follows: Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, U.S. Plans Service cost $ 5,633 $ 6,021 $ 11,267 $ 12,043 Interest cost 8,073 7,635 16,146 15,271 Expected return on plan assets (13,575 ) (13,627 ) (27,151 ) (27,255 ) Amortization of prior service cost (credit) 47 47 94 94 Amortization of actuarial loss 6,902 8,419 13,804 16,838 Pension expense for U.S. defined benefit plans $ 7,080 $ 8,495 $ 14,160 $ 16,991 Non-U.S. Plans Service cost $ 1,519 $ 1,514 $ 2,989 $ 3,046 Interest cost 1,092 746 2,147 1,497 Expected return on plan assets (1,290 ) (1,122 ) (2,533 ) (2,253 ) Amortization of prior service cost (credit) (15 ) (27 ) (29 ) (54 ) Amortization of actuarial loss 648 1,109 1,272 2,229 Pension expense for non-U.S. defined benefit plans $ 1,954 $ 2,220 $ 3,846 $ 4,465 Pension expense for our defined contribution plans consists of: Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, U.S. defined contribution plans $ 4,136 $ 3,586 $ 8,108 $ 7,256 Non-U.S. defined contribution plans 1,550 1,472 3,259 2,832 Total pension expense for defined contribution plans $ 5,686 $ 5,058 $ 11,367 $ 10,088 In 2018, expected contributions for all of our U.S. defined benefit pension plans to be approximately $149,000 .

Restructuring

Restructuring	6 Months Ended
	Mar. 31, 2018
Restructuring and Related Activities [Abstract]
Restructuring	Restructuring In 2018, we initiated restructuring actions in conjunction with exiting the wind pitch control business within our Industrial Systems segment. These actions will result in workforce reductions, principally in Germany and China. Charges taken consist of $7,329 of non-cash inventory reserves, $14,482 of non-cash charges, primarily for the impairment of long-lived assets, $7,439 for severance and $2,137 for other costs. Restructuring activity for severance and other costs is as follows: Aircraft Controls Industrial Systems Corporate Total Balance at September 30, 2017 $ 130 $ — $ 1,038 $ 1,168 Charged to expense - 2018 plan — 31,387 — 31,387 Cash payments - 2016 plan (130 ) — (298 ) (428 ) Non-cash charges - 2018 plan — (21,811 ) — (21,811 ) Balance at March 31, 2018 $ — $ 9,576 $ 740 $ 10,316 As of March 31, 2018 , the restructuring accrual consists of $740 for the 2016 plan and $9,576 for the 2018 plan. Restructuring for all plans is expected to be paid by December 29, 2018 , except portions classified as long-term liabilities based on payment arrangements.

Income Taxes

Income Taxes	6 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective tax rates for the three and six months ended March 31, 2018 were 45.6% and 79.2% , respectively. The effective tax rate for the three months ended March 31, 2018 is higher than would be expected by applying the U.S. federal statutory tax rate to earnings before income taxes primarily due to limited tax benefits associated with the restructuring charges taken in foreign jurisdictions of our Industrial Systems segment. The effective tax rate for the six months ended March 31, 2018 was also significantly impacted by the enactment of the Tax Cuts and Jobs Act (the "Act") of 2017. The Act was enacted on December 22, 2017. It reduces the U.S. federal corporate tax rate from 35% to 21% , requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred and creates new taxes on certain foreign sourced earnings. As of March 31, 2018 , we have not completed the accounting for the tax effects of enactment of the Act; however, as described below, we have made a reasonable estimate of the effects on the one-time transition tax, withholding taxes on earnings deemed to be repatriated and existing deferred tax balances. These amounts are provisional and subject to change as the determination of the impact of the income tax effects will require additional analysis of historical records, annual data and further interpretation of the Act from yet to be issued U.S. Treasury regulations. During the six months ended March 31, 2018 , we recorded a $31,300 one-time transition tax on undistributed foreign earnings deemed to be repatriated and a tax charge of $15,910 as an additional provision for taxes on undistributed earnings not considered to be permanently reinvested. No additional income taxes have been provided for any remaining undistributed foreign earnings not subject to the transition tax, or any additional outside basis difference inherent in these entities, as these amounts continue to be indefinitely reinvested in foreign operations. Determining the amount of unrecognized deferred tax liability related to any remaining undistributed foreign earnings not subject to the transition tax and additional outside basis difference in these entities is not practicable. These charges are partially offset by a $8,966 benefit due to the remeasurement of deferred tax assets and liabilities arising from a lower U.S. corporate tax rate, which took into account our decision to accelerate pension contributions into our 2017 pension plan year. This allows the pension contribution tax deduction to be taken in our 2017 federal income tax return which is taxed at the 35% federal rate. The effective tax rate for the three and six months ended April 1, 2017 were 34.3% and 27.1% , respectively. The effective tax rate for the three months ended April 1, 2017 is impacted by higher earnings in jurisdictions with higher statutory tax rates and no tax benefit for the losses associated with certain held for sale non-core businesses in Space and Defense Controls. The effective tax rate for the six months ended April 1, 2017 is lower than would be expected by applying the U.S. federal statutory tax rate to earnings before income taxes primarily due to a significant portion of our earnings that come from foreign operations with lower tax rates. Additionally, our effective tax rate in 2017 includes tax benefits associated with selling our European space businesses.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The changes in AOCIL, net of tax, by component for the six months ended March 31, 2018 are as follows: Accumulated foreign currency translation (1) Accumulated retirement liability Accumulated gain (loss) on derivatives Total AOCIL at September 30, 2017 $ (83,166 ) $ (251,865 ) $ (460 ) $ (335,491 ) Other comprehensive income (loss) before reclassifications 30,661 (1,222 ) 136 29,575 Amounts reclassified from AOCIL — 10,160 519 10,679 Other comprehensive income (loss) 30,661 8,938 655 40,254 Tax Cuts and Jobs Act, reclassification from AOCIL to retained earnings (2) — (47,209 ) 132 (47,077 ) AOCIL at March 31, 2018 $ (52,505 ) $ (290,136 ) $ 327 $ (342,314 ) (1) Net gains and losses on net investment hedges are recorded as cumulative translation adjustments in AOCIL to the extent that the instruments are effective in hedging the designated risk. (2) In the second quarter of 2018, we early adopted ASU 2018-02 and reclassified the stranded deferred tax effects resulting from the Tax Cuts and Jobs Act to retained earnings. The amounts reclassified from AOCIL into earnings are as follows: Three Months Ended Six Months Ended Statement of earnings classification March 31, April 1, March 31, April 1, Retirement liability: Prior service cost (credit) $ (86 ) $ 20 $ (171 ) $ 39 Actuarial losses 7,423 9,406 14,819 18,823 Reclassification from AOCIL into earnings (1) 7,337 9,426 14,648 18,862 Tax effect (1,796 ) (3,424 ) (4,488 ) (6,851 ) Net reclassification from AOCIL into earnings $ 5,541 $ 6,002 $ 10,160 $ 12,011 Derivatives: Foreign currency contracts Sales $ (138 ) $ 1,157 $ (256 ) $ 2,454 Foreign currency contracts Cost of sales 502 664 1,198 1,131 Interest rate swaps Interest (102 ) 63 (116 ) 178 Reclassification from AOCIL into earnings 262 1,884 826 3,763 Tax effect (72 ) (500 ) (307 ) (973 ) Net reclassification from AOCIL into earnings $ 190 $ 1,384 $ 519 $ 2,790 (1) The reclassifications are included in the computation of net periodic pension cost and postretirement benefit cost. The amounts deferred in AOCIL are as follows: Net deferral in AOCIL - effective portion Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, Foreign currency contracts $ (1,655 ) $ (323 ) $ (827 ) $ (2,109 ) Interest rate swaps 630 69 1,247 763 Net gain (loss) (1,025 ) (254 ) 420 (1,346 ) Tax effect 256 116 (284 ) 376 Net deferral in AOCIL of derivatives $ (769 ) $ (138 ) $ 136 $ (970 )

Stock Employee Compensation Tru

Stock Employee Compensation Trust and Supplemental Retirement Plan Trust	6 Months Ended
	Mar. 31, 2018
Share-based Compensation [Abstract]
Stock Employee Compensation Trust and Supplemental Retirement Plan Trust	Stock Employee Compensation Trust and Supplemental Retirement Plan Trust The Stock Employee Compensation Trust (SECT) assists in administering and provides funding for equity-based compensation plans and benefit programs, including the Moog Inc. Retirement Savings Plan (RSP). The Supplemental Retirement Plan (SERP) Trust provides funding for benefits under the SERP provisions of the Moog Inc. Plan to Equalize Retirement Income and Supplemental Retirement Income. Both the SECT and the SERP Trust hold shares as investments. The shares in the SECT and SERP Trust are not considered outstanding for purposes of calculating earnings per share. However, in accordance with the trust agreements governing the SECT and SERP Trust, the trustees vote all shares held by the SECT and SERP Trust on all matters submitted to shareholders.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Earnings per Share Basic and diluted weighted-average shares outstanding are as follows: Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, Basic weighted-average shares outstanding 35,770,089 35,888,053 35,771,247 35,878,552 Dilutive effect of equity-based awards 409,769 348,785 419,208 376,250 Diluted weighted-average shares outstanding 36,179,858 36,236,838 36,190,455 36,254,802 For the three and six months ended March 31, 2018 , there were 21,887 and 17,432 common shares from equity-based awards, respectively, excluded from the calculation of diluted earnings per share as they would be anti-dilutive. For the three and six months ended April 1, 2017 , there were 99,978 and 107,960 common shares from equity-based awards, respectively, excluded from the calculation of diluted earnings per share as they would be anti-dilutive. During the second quarter of 2018, the Board of Directors declared a $0.25 per share quarterly dividend payable on issued and outstanding shares of our Class A and Class B common stock on June 1, 2018 to shareholders of record at the close of business on May 15, 2018.

Segment Information

Segment Information	6 Months Ended
	Mar. 31, 2018
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Segment Information	Segment Information Effective October 1, 2017, we made changes to our segment reporting structure that resulted in three reporting segments. Our former Components segment has been separated and merged into Space and Defense Controls and Industrial Systems. All amounts have been restated to reflect this change. Below are sales and operating profit by segment for the three and six months ended March 31, 2018 and April 1, 2017 and a reconciliation of segment operating profit to earnings before income taxes. Operating profit is net sales less cost of sales and other operating expenses, excluding interest expense, equity-based compensation expense and other corporate expenses. Cost of sales and other operating expenses are directly identifiable to the respective segment or allocated on the basis of sales, number of employees or profit. Refer to Note 11, Restructuring, for the impact of amounts charged to expense that are reflected in the operating profit (loss) of the Industrial Systems segment. Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, Net sales: Aircraft Controls $ 311,439 $ 289,661 $ 589,973 $ 558,111 Space and Defense Controls 143,527 138,834 276,920 261,424 Industrial Systems 234,083 203,908 449,691 402,538 Net sales $ 689,049 $ 632,403 $ 1,316,584 $ 1,222,073 Operating profit (loss): Aircraft Controls $ 33,480 $ 31,181 $ 64,248 $ 54,292 Space and Defense Controls 16,841 11,381 33,130 20,469 Industrial Systems (6,050 ) 22,265 13,196 42,428 Total operating profit 44,271 64,827 110,574 117,189 Deductions from operating profit: Interest expense 9,089 8,649 17,735 17,135 Equity-based compensation expense 1,499 986 3,500 3,154 Corporate and other expenses, net 8,014 6,989 15,836 12,209 Earnings before income taxes $ 25,669 $ 48,203 $ 73,503 $ 84,691 The amounts reclassified for net sales and operating profit as a result of the revised segment reporting structure for the three and six months ended April 1, 2017 are as follows: Three Months Ended Six Months Ended Net sales: Space and Defense Controls $ 32,986 $ 62,646 Industrial Systems 88,477 174,708 Total $ 121,463 $ 237,354 Operating profit: Space and Defense Controls $ 893 $ 2,885 Industrial Systems 9,947 19,409 Total $ 10,840 $ 22,294 Segment assets for Space and Defense Controls and Industrial Systems are approximately $627,000 and $1,229,000 , respectively, as of March 31, 2018 , primarily as a result of the change to our segment reporting structure.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Mar. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions Disclosure	Related Party Transactions On November 20, 2017, John Scannell was elected to the Board of Directors of M&T Bank Corporation and M&T Bank. We currently engage with M&T Bank in the ordinary course of business for various financing activities, all of which were initiated prior to the election of Mr. Scannell to the Board. M&T Bank provides credit extension for routine purchases, which for the six months ended March 31, 2018 totaled $11,218 . At March 31, 2018 , we held a $15,000 interest rate swap with M&T Bank and outstanding leases with a total original cost of $27,516 . M&T Bank also maintains an interest of approximately 12% in our U.S. revolving credit facility. Further details of the U.S. revolving credit facility can be found in Note 6, Indebtedness.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies From time to time, we are involved in legal proceedings. We are not a party to any pending legal proceedings which management believes will result in a material adverse effect on our financial condition, results of operations or cash flows. We are engaged in administrative proceedings with governmental agencies and legal proceedings with governmental agencies and other third parties in the normal course of our business, including litigation under Superfund laws, regarding environmental matters. We believe that adequate reserves have been established for our share of the estimated cost for all currently pending environmental administrative or legal proceedings and do not expect that these environmental matters will have a material adverse effect on our financial condition, results of operations or cash flows. In the ordinary course of business we could be subject to ongoing claims or disputes from our customers, the ultimate settlement of which could have a material adverse impact on our consolidated results of operations. While the receivables and any loss provisions recorded to date reflect management's best estimate of the projected costs to complete a given project, there may still be significant effort required to complete the ultimate deliverable. Future variability in internal cost as well as future profitability is dependent upon a number of factors including deliveries, performance and government budgetary pressures. The inability to achieve a satisfactory contractual solution, further unplanned delays, additional developmental cost growth or variations in any of the estimates used in the existing contract analysis could lead to further loss provisions. Additional losses could have a material adverse impact on our financial condition, results of operations or cash flows in the period in which the loss may be recognized. We are contingently liable for $47,418 of standby letters of credit issued by a bank to third parties on our behalf at March 31, 2018 .

Basis Of Presentation (Policies

Basis Of Presentation (Policies)	6 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting	The accompanying unaudited consolidated condensed financial statements have been prepared by management in accordance with U.S. generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. In the opinion of management, all adjustments consisting of normal recurring adjustments considered necessary for the fair presentation of results for the interim period have been included. The results of operations for the three and six months ended March 31, 2018 are not necessarily indicative of the results expected for the full year. The accompanying unaudited consolidated condensed financial statements should be read in conjunction with the financial statements and notes thereto included in our Form 10-K for the fiscal year ended September 30, 2017 . All references to years in these financial statements are to fiscal years.
Reclassification	Certain prior year amounts have been reclassified to conform to current year's presentation. During 2018, we made a change to our segment reporting structure and merged our former Components segment into Space and Defense Controls and Industrial Systems. The Goodwill and Segment footnotes have been restated to reflect these changes.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Adopted Standard Description Financial Statement Effect or Other Significant Matters ASU no. 2018-02 Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income The standard amends existing guidance and allows a reclassification from accumulated other comprehensive income (loss) to retained earnings for stranded deferred tax effects resulting from the Tax Cuts and Jobs Act. The standard requires certain disclosures about stranded deferred tax effects. The provisions of the standard are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. We adopted this standard recording the related stranded deferred tax effects in the period of adoption, resulting in $47,077 being reclassified from accumulated other comprehensive income (loss) to retained earnings as of March 31, 2018. Date early adopted: Q2 2018 Recent Accounting Pronouncements Not Yet Adopted Standard Description Financial Statement Effect or Other Significant Matters ASU no. 2014-09 Revenue from Contracts with Customers (and All Related ASUs) The standard requires revenue recognition to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard also requires additional disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts. The provisions of the standard, as well as all subsequently issued clarifications to the standard, are effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. The standard can be adopted using either a full retrospective or modified retrospective approach. We plan to adopt the standard using the modified retrospective method, under which prior years' results are not restated, but supplemental information will be provided in our disclosures that will present fiscal 2019 results before adoption of the standard. In addition, a cumulative adjustment will be necessary to Shareholder's Equity at the beginning of fiscal 2019. We are assessing the impact of the standard on our financial statements and related disclosures, internal controls and financial policies and information technology systems. We have not yet quantified the impact on our financial statements and related disclosures. Planned date of adoption: Q1 2019 ASU no. 2016-01 Recognition and Measurement of Financial Assets and Financial Liabilities The standard requires most equity investments to be measured at fair value, with subsequent changes in fair value recognized in net income. The amendment also impacts the measurement of financial liabilities under the fair value option as well as certain presentation and disclosure requirements for financial instruments. The provisions of the standard are effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted for some, but not all, provisions. The amendment requires certain provisions to be applied prospectively and others to be applied by means of a cumulative-effect adjustment. We are currently evaluating the effect on our financial statements and related disclosures. Planned date of adoption: Q1 2019 ASU no. 2016-02 Leases (and All Related ASUs) The standard requires most lease arrangements to be recognized in the balance sheet as lease assets and lease liabilities. The standard also requires additional disclosures about the leasing arrangements. The provisions of the standard are effective for fiscal years beginning after December 15, 2018 and interim periods within those years. Early adoption is permitted. We are currently evaluating the effect on our financial statements and related disclosures. Planned date of adoption: Q1 2020 ASU no. 2017-07 Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost The standard amends existing guidance on the presentation of net periodic benefit cost in the income statement and what qualifies for capitalization on the balance sheet. The provisions of the standard are effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted as of the beginning of an annual period. The amendment requires income statement presentation provisions to be applied retrospectively and capitalization in assets provisions to be applied prospectively. We are currently evaluating the effect on our financial statements and related disclosures. Planned date of adoption: Q1 2019 ASU no. 2017-12 Targeted Improvements to Accounting for Hedging Activities The standard expands the hedging strategies eligible for hedge accounting, while simplifying presentation and disclosure by eliminating separate measurement and reporting of hedge ineffectiveness. The provisions of the standard are effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the effect on our financial statements and related disclosures. Planned date of adoption: Q1 2020 We consider the applicability and impact of all ASUs. ASUs not listed above were assessed and determined to be either not applicable, or had or are expected to have minimal impact on our financial statements and related disclosures.

Receivables (Tables)

Receivables (Tables)	6 Months Ended
	Mar. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Schedule of Accounts, Notes, Loans and Financing Receivable	Receivables consist of: March 31, September 30, Accounts receivable $ 296,761 $ 286,773 Long-term contract receivables: Amounts billed 153,489 148,087 Unbilled recoverable costs and accrued profits 291,256 282,154 Total long-term contract receivables 444,745 430,241 Other 34,191 15,077 Total receivables 775,697 732,091 Less allowance for doubtful accounts (4,966 ) (4,351 ) Receivables $ 770,731 $ 727,740

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Mar. 31, 2018
Inventory Disclosure [Abstract]
Schedule of Inventory, net of reserves	Inventories, net of reserves, consist of: March 31, September 30, Raw materials and purchased parts $ 189,317 $ 189,517 Work in progress 254,059 229,202 Finished goods 74,623 70,408 Inventories $ 517,999 $ 489,127

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carry Amount of Goodwill	The changes in the carrying amount of goodwill are as follows: Aircraft Space and Industrial Total Balance at September 30, 2017 $ 181,375 $ 259,951 $ 332,942 $ 774,268 Acquisition — — 23,026 23,026 Foreign currency translation 2,558 332 4,468 7,358 Balance at March 31, 2018 $ 183,933 $ 260,283 $ 360,436 $ 804,652
Components of Intangible Assets	The components of intangible assets are as follows: March 31, 2018 September 30, 2017 Weighted- Gross Carrying Accumulated Gross Carrying Accumulated Customer-related 11 $ 147,256 $ (96,394 ) $ 175,872 $ (128,019 ) Technology-related 9 71,442 (50,665 ) 71,924 (55,069 ) Program-related 19 69,020 (34,007 ) 66,458 (30,675 ) Marketing-related 8 25,135 (18,642 ) 26,552 (19,251 ) Other 10 4,563 (3,652 ) 4,379 (3,353 ) Intangible assets 12 $ 317,416 $ (203,360 ) $ 345,185 $ (236,367 )

Indebtedness (Tables)

Indebtedness (Tables)	6 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Components of Long-term debt	Long-term debt consists of: March 31, September 30, U.S. revolving credit facility $ 480,000 $ 540,110 Senior notes 300,000 300,000 Securitization program 130,000 120,000 Obligations under capital leases 238 306 Senior debt 910,238 960,416 Less deferred debt issuance cost (2,571 ) (3,468 ) Less current installments (238 ) (295 ) Long-term debt $ 907,429 $ 956,653

Product Warranties (Tables)

Product Warranties (Tables)	6 Months Ended
	Mar. 31, 2018
Product Warranties Disclosures [Abstract]
Summary of Activity in Warranty Accrual	Activity in the warranty accrual is summarized as follows: Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, Warranty accrual at beginning of period $ 27,748 $ 22,883 $ 25,848 $ 21,363 Warranties issued during current period 3,280 4,741 8,037 8,155 Adjustments to pre-existing warranties (175 ) (106 ) (245 ) (371 ) Reductions for settling warranties (3,007 ) (4,419 ) (5,922 ) (5,463 ) Foreign currency translation 409 173 537 (412 ) Warranty accrual at end of period $ 28,255 $ 23,272 $ 28,255 $ 23,272

Derivative Financial Instrume32

Derivative Financial Instruments (Tables)	6 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedges, Assets [Abstract]
Gains And Losses On Foreign Currency Forwards Included In Other Income Or Expense	We recorded the following gains or losses on foreign currency contracts which are included in other income or expense and generally offset the gains or losses from the foreign currency adjustments on the intercompany balances that are also included in other income or expense: Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, Net gain (loss) $ (2,381 ) $ (493 ) $ (3,009 ) $ 901
Fair Value And Classification Of Derivatives On The Consolidated Balance Sheets	The fair value and classification of derivatives is summarized as follows: March 31, September 30, Derivatives designated as hedging instruments: Foreign currency contracts Other current assets $ 228 $ 551 Foreign currency contracts Other assets 11 50 Interest rate swaps Other current assets 1,412 552 Interest rate swaps Other assets 592 314 Net investment hedge Other current assets 240 — Total asset derivatives $ 2,483 $ 1,467 Foreign currency contracts Other accrued liabilities $ 1,355 $ 1,434 Foreign currency contracts Other long-term liabilities 494 244 Interest rate swaps Other accrued liabilities — 10 Interest rate swaps Other long-term liabilities — 15 Total liability derivatives $ 1,849 $ 1,703 Derivatives not designated as hedging instruments: Foreign currency contracts Other current assets $ 101 $ 95 Foreign currency contracts Other accrued liabilities $ 469 $ 383

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Values And Classification Of Financial Assets And Liabilities Measured On A Recurring Basis	The following table presents the fair values and classification of our financial assets and liabilities measured on a recurring basis, all of which are classified as Level 2. Classification March 31, September 30, Foreign currency contracts Other current assets $ 329 $ 646 Foreign currency contracts Other assets 11 50 Interest rate swaps Other current assets 1,412 552 Interest rate swaps Other assets 592 314 Net investment hedge Other current assets 240 — Total assets $ 2,584 $ 1,562 Foreign currency contracts Other accrued liabilities $ 1,824 $ 1,817 Foreign currency contracts Other long-term liabilities 494 244 Interest rate swaps Other accrued liabilities — 10 Interest rate swaps Other long-term liabilities — 15 Total liabilities $ 2,318 $ 2,086

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	6 Months Ended
	Mar. 31, 2018
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]
Net Periodic Benefit Costs	Net periodic benefit costs for our defined benefit pension plans are as follows: Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, U.S. Plans Service cost $ 5,633 $ 6,021 $ 11,267 $ 12,043 Interest cost 8,073 7,635 16,146 15,271 Expected return on plan assets (13,575 ) (13,627 ) (27,151 ) (27,255 ) Amortization of prior service cost (credit) 47 47 94 94 Amortization of actuarial loss 6,902 8,419 13,804 16,838 Pension expense for U.S. defined benefit plans $ 7,080 $ 8,495 $ 14,160 $ 16,991 Non-U.S. Plans Service cost $ 1,519 $ 1,514 $ 2,989 $ 3,046 Interest cost 1,092 746 2,147 1,497 Expected return on plan assets (1,290 ) (1,122 ) (2,533 ) (2,253 ) Amortization of prior service cost (credit) (15 ) (27 ) (29 ) (54 ) Amortization of actuarial loss 648 1,109 1,272 2,229 Pension expense for non-U.S. defined benefit plans $ 1,954 $ 2,220 $ 3,846 $ 4,465
Defined Contribution Plan Disclosures	Pension expense for our defined contribution plans consists of: Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, U.S. defined contribution plans $ 4,136 $ 3,586 $ 8,108 $ 7,256 Non-U.S. defined contribution plans 1,550 1,472 3,259 2,832 Total pension expense for defined contribution plans $ 5,686 $ 5,058 $ 11,367 $ 10,088

Restructuring (Tables)

Restructuring (Tables)	6 Months Ended
	Mar. 31, 2018
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Reserve Activity	Restructuring activity for severance and other costs is as follows: Aircraft Controls Industrial Systems Corporate Total Balance at September 30, 2017 $ 130 $ — $ 1,038 $ 1,168 Charged to expense - 2018 plan — 31,387 — 31,387 Cash payments - 2016 plan (130 ) — (298 ) (428 ) Non-cash charges - 2018 plan — (21,811 ) — (21,811 ) Balance at March 31, 2018 $ — $ 9,576 $ 740 $ 10,316

Accumulated Other Comprehensi36

Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Components of AOCI	The changes in AOCIL, net of tax, by component for the six months ended March 31, 2018 are as follows: Accumulated foreign currency translation (1) Accumulated retirement liability Accumulated gain (loss) on derivatives Total AOCIL at September 30, 2017 $ (83,166 ) $ (251,865 ) $ (460 ) $ (335,491 ) Other comprehensive income (loss) before reclassifications 30,661 (1,222 ) 136 29,575 Amounts reclassified from AOCIL — 10,160 519 10,679 Other comprehensive income (loss) 30,661 8,938 655 40,254 Tax Cuts and Jobs Act, reclassification from AOCIL to retained earnings (2) — (47,209 ) 132 (47,077 ) AOCIL at March 31, 2018 $ (52,505 ) $ (290,136 ) $ 327 $ (342,314 )
Reclassification from AOCI	The amounts reclassified from AOCIL into earnings are as follows: Three Months Ended Six Months Ended Statement of earnings classification March 31, April 1, March 31, April 1, Retirement liability: Prior service cost (credit) $ (86 ) $ 20 $ (171 ) $ 39 Actuarial losses 7,423 9,406 14,819 18,823 Reclassification from AOCIL into earnings (1) 7,337 9,426 14,648 18,862 Tax effect (1,796 ) (3,424 ) (4,488 ) (6,851 ) Net reclassification from AOCIL into earnings $ 5,541 $ 6,002 $ 10,160 $ 12,011 Derivatives: Foreign currency contracts Sales $ (138 ) $ 1,157 $ (256 ) $ 2,454 Foreign currency contracts Cost of sales 502 664 1,198 1,131 Interest rate swaps Interest (102 ) 63 (116 ) 178 Reclassification from AOCIL into earnings 262 1,884 826 3,763 Tax effect (72 ) (500 ) (307 ) (973 ) Net reclassification from AOCIL into earnings $ 190 $ 1,384 $ 519 $ 2,790
Activity and Classification of Derivative Deferral in AOCI	The amounts deferred in AOCIL are as follows: Net deferral in AOCIL - effective portion Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, Foreign currency contracts $ (1,655 ) $ (323 ) $ (827 ) $ (2,109 ) Interest rate swaps 630 69 1,247 763 Net gain (loss) (1,025 ) (254 ) 420 (1,346 ) Tax effect 256 116 (284 ) 376 Net deferral in AOCIL of derivatives $ (769 ) $ (138 ) $ 136 $ (970 )

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Basic And Diluted Weighted-Average Shares Outstanding	Basic and diluted weighted-average shares outstanding are as follows: Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, Basic weighted-average shares outstanding 35,770,089 35,888,053 35,771,247 35,878,552 Dilutive effect of equity-based awards 409,769 348,785 419,208 376,250 Diluted weighted-average shares outstanding 36,179,858 36,236,838 36,190,455 36,254,802

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Mar. 31, 2018
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Sales And Operating Profit By Segment And Reconciliation Of Segment Operating Profit To Earnings Before Income Taxes	Three Months Ended Six Months Ended March 31, April 1, March 31, April 1, Net sales: Aircraft Controls $ 311,439 $ 289,661 $ 589,973 $ 558,111 Space and Defense Controls 143,527 138,834 276,920 261,424 Industrial Systems 234,083 203,908 449,691 402,538 Net sales $ 689,049 $ 632,403 $ 1,316,584 $ 1,222,073 Operating profit (loss): Aircraft Controls $ 33,480 $ 31,181 $ 64,248 $ 54,292 Space and Defense Controls 16,841 11,381 33,130 20,469 Industrial Systems (6,050 ) 22,265 13,196 42,428 Total operating profit 44,271 64,827 110,574 117,189 Deductions from operating profit: Interest expense 9,089 8,649 17,735 17,135 Equity-based compensation expense 1,499 986 3,500 3,154 Corporate and other expenses, net 8,014 6,989 15,836 12,209 Earnings before income taxes $ 25,669 $ 48,203 $ 73,503 $ 84,691
Reconciliation of Revenue from Segments to Consolidated	The amounts reclassified for net sales and operating profit as a result of the revised segment reporting structure for the three and six months ended April 1, 2017 are as follows: Three Months Ended Six Months Ended Net sales: Space and Defense Controls $ 32,986 $ 62,646 Industrial Systems 88,477 174,708 Total $ 121,463 $ 237,354
Reconciliation of Operating Profit (Loss) from Segments to Consolidated	Operating profit: Space and Defense Controls $ 893 $ 2,885 Industrial Systems 9,947 19,409 Total $ 10,840 $ 22,294

Basis Of Presentation Basis of

Basis Of Presentation Basis of Presentation (Reclassifications) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Tax Cuts and Jobs Act, reclassification from AOCIL to retained earnings	$ 47,077	$ 0	$ 47,077	$ 0

Acquisitions, Divestitures an40

Acquisitions, Divestitures and Equity Investments (Narrative) (Details) - USD ($) $ in Thousands	Mar. 29, 2018	Apr. 02, 2017	Mar. 31, 2018	Sep. 30, 2017
Space And Defense Controls
Business Acquisitions, Divestitures and Equity Method Investments
Proceeds from Divestiture of Businesses				$ 7,210
Space And Defense Controls | Other Expense
Business Acquisitions, Divestitures and Equity Method Investments
Loss on Divestiture				$ (13,119)
VUES Brno s.r.o | Industrial Systems
Business Acquisitions, Divestitures and Equity Method Investments
Purchase Price Net of Acquired Cash	$ 62,683
Cash Paid to Acquire a Business	42,110
Long-term Debt Assumed	$ 20,573
Moog Aircraft Services Asia | Aircraft Controls
Business Acquisitions, Divestitures and Equity Method Investments
Ownership Percentage, Equity Method Investment			51.00%
Contributions Made on Equity Method Investment			$ 3,570
Planned Number of Future Contributions on Equity Method Investment			one
Planned Amount of Future Contributions on Equity Method Investment			$ 1,530
Rotary Transfer Systems | Industrial Systems
Business Acquisitions, Divestitures and Equity Method Investments
Purchase Price Net of Acquired Cash		$ 42,593
Cash Paid to Acquire a Business		40,545
Pension Obligations Assumed		$ 2,048

Receivables (Schedule of Receiv

Receivables (Schedule of Receivables) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Mar. 31, 2018	Sep. 30, 2017
Receivables [Abstract]
Accounts receivable	$ 296,761	$ 286,773
Long-term contract receivable - Amounts billed	153,489	148,087
Long-term contract receivable - Unbilled recoverable costs and accrued profits	291,256	282,154
Total long-term contract receivables	444,745	430,241
Other	34,191	15,077
Total receivables	775,697	732,091
Less allowance for doubtful accounts	(4,966)	(4,351)
Receivables	$ 770,731	$ 727,740

Inventories (Schedule of Invent

Inventories (Schedule of Inventory)(Details) - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Inventory Disclosure [Abstract]
Raw materials and purchased parts	$ 189,317	$ 189,517
Work in progress	254,059	229,202
Finished goods	74,623	70,408
Inventories	$ 517,999	$ 489,127

Goodwill And Intangible Asset43

Goodwill And Intangible Assets (Changes In Carrying Amount Of Goodwill) (Details) $ in Thousands	6 Months Ended
	Mar. 31, 2018USD ($)
Goodwill
Beginning balance	$ 774,268
Acquisition	23,026
Foreign currency translation	7,358
Ending balance	804,652
Aircraft Controls
Goodwill
Beginning balance	181,375
Acquisition	0
Foreign currency translation	2,558
Ending balance	183,933
Space And Defense Controls
Goodwill
Beginning balance	259,951
Acquisition	0
Foreign currency translation	332
Ending balance	260,283
Industrial Systems
Goodwill
Beginning balance	332,942
Acquisition	23,026
Foreign currency translation	4,468
Ending balance	$ 360,436

Goodwill And Intangible Asset44

Goodwill And Intangible Assets (Goodwill Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Mar. 31, 2018
Space And Defense Controls
Goodwill [Line Items]
Goodwill, accumulated impairment loss		$ 4,800
Industrial Systems
Goodwill [Line Items]
Goodwill, accumulated impairment loss		$ 38,200
Goodwill | Space And Defense Controls
Goodwill [Line Items]
Prior period reclassification adjustment	$ 86,995
Goodwill | Industrial Systems
Goodwill [Line Items]
Prior period reclassification adjustment	$ 224,194

Goodwill And Intangible Asset45

Goodwill And Intangible Assets (Components Of Intangible Assets) (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2018	Sep. 30, 2017
Finite-Lived Intangible Assets
Weighted-Average Life (years)	12 years
Gross Carrying Amount	$ 317,416	$ 345,185
Accumulated Amortization	$ (203,360)	(236,367)
Customer-Related
Finite-Lived Intangible Assets
Weighted-Average Life (years)	11 years
Gross Carrying Amount	$ 147,256	175,872
Accumulated Amortization	$ (96,394)	(128,019)
Technology-Related
Finite-Lived Intangible Assets
Weighted-Average Life (years)	9 years
Gross Carrying Amount	$ 71,442	71,924
Accumulated Amortization	$ (50,665)	(55,069)
Program-Related
Finite-Lived Intangible Assets
Weighted-Average Life (years)	19 years
Gross Carrying Amount	$ 69,020	66,458
Accumulated Amortization	$ (34,007)	(30,675)
Marketing-Related
Finite-Lived Intangible Assets
Weighted-Average Life (years)	8 years
Gross Carrying Amount	$ 25,135	26,552
Accumulated Amortization	$ (18,642)	(19,251)
Other Intangible Assets
Finite-Lived Intangible Assets
Weighted-Average Life (years)	10 years
Gross Carrying Amount	$ 4,563	4,379
Accumulated Amortization	$ (3,652)	$ (3,353)

Goodwill And Intangible Asset46

Goodwill And Intangible Assets (Intangibles Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 4,671	$ 4,723	$ 9,271	$ 9,200
Future amortization expenses, 2018	17,400		17,400
Future amortization expenses, 2019	15,100		15,100
Future amortization expenses, 2020	12,900		12,900
Future amortization expenses, 2021	10,500		10,500
Future amortization expenses, 2022	$ 8,900		$ 8,900

Indebtedness (Components of Lon

Indebtedness (Components of Long-term debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Debt Disclosure [Abstract]
U.S. revolving credit facility	$ 480,000	$ 540,110
Senior notes	300,000	300,000
Securitization program	130,000	120,000
Obligations under capital leases	238	306
Senior debt	910,238	960,416
Less deferred debt issuance cost	(2,571)	(3,468)
Less current installments	(238)	(295)
Long-term debt	$ 907,429	$ 956,653

Indebtedness (Narrative) (Detai

Indebtedness (Narrative) (Details) - USD ($) $ in Thousands	Oct. 23, 2017	Jun. 28, 2016	Mar. 31, 2018
Revolving Credit Facility
Line of Credit Facility
Line of Credit Facility, Current Borrowing Capacity		$ 1,100,000
Expansion option to increase credit facility		$ 200,000
Senior Notes
Line of Credit Facility
Debt Instrument, Face Amount			$ 300,000
Debt Instrument, Interest Rate, Stated Percentage			5.25%
Securitization Program
Line of Credit Facility
Maximum credit facility amount that can borrow	$ 130,000
Percentage of borrowing capacity on the Securitization Program	80.00%
Percentage of borrowing base on the Securitization Program	100.00%
Minimum borrowing requirement for the Securitization Program			$ 104,000

Product Warranties (Narrative)

Product Warranties (Narrative) (Details)	6 Months Ended
	Mar. 31, 2018
Minimum
Product Warranties
Warranty period - months	twelve
Maximum
Product Warranties
Warranty period - months	sixty

Product Warranties (Summary Of

Product Warranties (Summary Of Activity In Warranty Accrual) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Movement in Standard Product Warranty Accrual [Roll Forward]
Warranty accrual at beginning of period	$ 27,748	$ 22,883	$ 25,848	$ 21,363
Warranties issued during current period	3,280	4,741	8,037	8,155
Adjustments to pre-existing warranties	(175)	(106)	(245)	(371)
Reductions for settling warranties	(3,007)	(4,419)	(5,922)	(5,463)
Foreign currency translation	409	173	537	(412)
Warranty accrual at end of period	$ 28,255	$ 23,272	$ 28,255	$ 23,272

Derivative Financial Instrume51

Derivative Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Designated as Hedging Instrument
Derivative
Cash Flow Hedge Ineffectiveness is Immaterial	not material	not material
Designated as Hedging Instrument | Interest Rate Swaps
Derivative
Notional Amount, Derivative	$ 150,000
Conversion Rate Of Interest Rate Swaps From Variable to Fixed	2.62%
Basis Spread on Variable Rate Derivative	1.38%
Designated as Hedging Instrument | Foreign Currency Contracts
Derivative
Notional Amount, Derivative	$ 49,153
Designated as Hedging Instrument | Net Investment Hedge
Derivative
Notional Amount, Derivative	28,722
Not Designated as Hedging Instrument | Foreign Currency Contracts
Derivative
Notional Amount, Derivative	$ 78,648

Derivative Financial Instrume52

Derivative Financial Instruments (Gains And Losses On Foreign Currency Forwards Included In Other Income Or Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Derivative Instrument Detail [Abstract]
Net gain (loss)	$ (2,381)	$ (493)	$ (3,009)	$ 901

Derivative Financial Instrume53

Derivative Financial Instruments (Fair Value And Classification Of Derivatives On The Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Designated as Hedging Instrument | Other Current Assets | Foreign Currency Contracts
Derivative Instruments, Fair Value
Derivative assets as hedging instruments, fair value	$ 228	$ 551
Designated as Hedging Instrument | Other Current Assets | Interest Rate Swaps
Derivative Instruments, Fair Value
Derivative assets as hedging instruments, fair value	1,412	552
Designated as Hedging Instrument | Other Current Assets | Net Investment Hedge
Derivative Instruments, Fair Value
Derivative assets as hedging instruments, fair value	240	0
Designated as Hedging Instrument | Other Assets | Foreign Currency Contracts
Derivative Instruments, Fair Value
Derivative assets as hedging instruments, fair value	11	50
Designated as Hedging Instrument | Other Assets | Interest Rate Swaps
Derivative Instruments, Fair Value
Derivative assets as hedging instruments, fair value	592	314
Designated as Hedging Instrument | Total asset derivative
Derivative Instruments, Fair Value
Derivative assets as hedging instruments, fair value	2,483	1,467
Designated as Hedging Instrument | Other Accrued Liabilities | Foreign Currency Contracts
Derivative Instruments, Fair Value
Derivative liabilities as hedging instruments, fair value	1,355	1,434
Designated as Hedging Instrument | Other Accrued Liabilities | Interest Rate Swaps
Derivative Instruments, Fair Value
Derivative liabilities as hedging instruments, fair value	0	10
Designated as Hedging Instrument | Other Long-Term Liabilities | Foreign Currency Contracts
Derivative Instruments, Fair Value
Derivative liabilities as hedging instruments, fair value	494	244
Designated as Hedging Instrument | Other Long-Term Liabilities | Interest Rate Swaps
Derivative Instruments, Fair Value
Derivative liabilities as hedging instruments, fair value	0	15
Designated as Hedging Instrument | Total liability derivatives
Derivative Instruments, Fair Value
Derivative liabilities as hedging instruments, fair value	1,849	1,703
Not Designated As Hedging Instruments | Other Current Assets | Foreign Currency Contracts
Derivative Instruments, Fair Value
Derivative assets as hedging instruments, fair value	101	95
Not Designated As Hedging Instruments | Other Accrued Liabilities | Foreign Currency Contracts
Derivative Instruments, Fair Value
Derivative liabilities as hedging instruments, fair value	$ 469	$ 383

Fair Value (Fair Values And Cla

Fair Value (Fair Values And Classification Of Financial Assets And Liabilities Measured On A Recurring Basis) (Details) - Level 2 - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreign currency forwards, fair value assets	$ 329	$ 646
Interest rate swap, fair value assets	1,412	552
Net investment hedge, fair value assets	240	0
Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreign currency forwards, fair value assets	11	50
Interest rate swap, fair value assets	592	314
Total Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total fair value assets	2,584	1,562
Other Accrued Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreign currency forwards, fair value liabilities	1,824	1,817
Interest rate swap, fair value liabilities	0	10
Other Long-Term Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreign currency forwards, fair value liabilities	494	244
Interest rate swap, fair value liabilities	0	15
Total Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total fair value liabilities	$ 2,318	$ 2,086

Fair Value Fair Value (Narrativ

Fair Value Fair Value (Narrative) (Details) $ in Thousands	Mar. 31, 2018USD ($)
Fair Value Disclosures [Abstract]
Fair value of long-term debt	$ 917,738
Carrying value of long-term debt	$ 910,238

Employee Benefit Plans (Net Per

Employee Benefit Plans (Net Periodic Benefit Costs) (Details) - Defined Benefit Pension Plans - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
U.S. Plans
Defined Benefit Plan Disclosure
Service cost	$ 5,633	$ 6,021	$ 11,267	$ 12,043
Interest cost	8,073	7,635	16,146	15,271
Expected return on plan assets	(13,575)	(13,627)	(27,151)	(27,255)
Amortization of prior service cost (credit)	47	47	94	94
Amortization of actuarial loss	6,902	8,419	13,804	16,838
Pension expense for defined benefit plans	7,080	8,495	14,160	16,991
Non-U.S. Plans
Defined Benefit Plan Disclosure
Service cost	1,519	1,514	2,989	3,046
Interest cost	1,092	746	2,147	1,497
Expected return on plan assets	(1,290)	(1,122)	(2,533)	(2,253)
Amortization of prior service cost (credit)	(15)	(27)	(29)	(54)
Amortization of actuarial loss	648	1,109	1,272	2,229
Pension expense for defined benefit plans	$ 1,954	$ 2,220	$ 3,846	$ 4,465

Employee Benefit Plans (Defined

Employee Benefit Plans (Defined Contribution Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Defined Contribution Pension Plans
Defined Contribution Plan Disclosure
Defined contribution plan expense	$ 5,686	$ 5,058	$ 11,367	$ 10,088
U.S. Plans
Defined Contribution Plan Disclosure
Defined contribution plan expense	4,136	3,586	8,108	7,256
Non-U.S. Plans
Defined Contribution Plan Disclosure
Defined contribution plan expense	$ 1,550	$ 1,472	$ 3,259	$ 2,832

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) $ in Thousands	Mar. 31, 2018USD ($)
U.S. Plans
Defined Benefit Plan Disclosure
Expected future employer contributions for the fiscal year	$ 149,000

Restructuring Restructuring (Na

Restructuring Restructuring (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017	Sep. 30, 2017
Restructuring Cost and Reserve
Non-cash inventory reserves	$ 7,329	$ 0	$ 7,329	$ 0
Restructuring	24,058	$ 0	24,058	$ 0
Restructuring Reserve	10,316		10,316		$ 1,168
2016 Plan
Restructuring Cost and Reserve
Restructuring Reserve	740		740
2018 Plan
Restructuring Cost and Reserve
Restructuring			31,387
Restructuring Reserve	$ 9,576		9,576
2018 Plan | Other Restructuring
Restructuring Cost and Reserve
Restructuring			2,137
2018 Plan | Other Restructuring | Inventory
Restructuring Cost and Reserve
Non-cash inventory reserves			7,329
2018 Plan | Other Restructuring | Finite-Lived Intangible Assets
Restructuring Cost and Reserve
Restructuring Costs and Asset Impairment Charges			14,482
2018 Plan | Employee Severance
Restructuring Cost and Reserve
Restructuring			$ 7,439

Restructuring (Schedule of Rest

Restructuring (Schedule of Restructuring Reserve Activity) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Restructuring Reserve
Restructuring accrual at beginning of period			$ 1,168
Charged to expense	$ 24,058	$ 0	24,058	$ 0
Restructuring accrual at end of period	10,316		10,316
2016 Plan
Restructuring Reserve
Cash payments			(428)
Restructuring accrual at end of period	740		740
2018 Plan
Restructuring Reserve
Charged to expense			31,387
Non-cash charges			(21,811)
Restructuring accrual at end of period	9,576		9,576
Aircraft Controls
Restructuring Reserve
Restructuring accrual at beginning of period			130
Restructuring accrual at end of period	0		0
Aircraft Controls | 2016 Plan
Restructuring Reserve
Cash payments			(130)
Aircraft Controls | 2018 Plan
Restructuring Reserve
Charged to expense			0
Non-cash charges			0
Industrial Systems
Restructuring Reserve
Restructuring accrual at beginning of period			0
Restructuring accrual at end of period	9,576		9,576
Industrial Systems | 2016 Plan
Restructuring Reserve
Cash payments			0
Industrial Systems | 2018 Plan
Restructuring Reserve
Charged to expense			31,387
Non-cash charges			(21,811)
Corporate
Restructuring Reserve
Restructuring accrual at beginning of period			1,038
Restructuring accrual at end of period	$ 740		740
Corporate | 2016 Plan
Restructuring Reserve
Cash payments			(298)
Corporate | 2018 Plan
Restructuring Reserve
Charged to expense			0
Non-cash charges			$ 0

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	Dec. 22, 2017	Oct. 01, 2017	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Income Tax Disclosure [Abstract]
Effective income tax rate			45.60%	34.30%	79.20%	27.10%
U.S. federal corporate tax rate	21.00%	35.00%
Transition Tax on Undistributed Foreign Earnings Deemed To Be Repatriated					$ 31,300
Withholding Taxes on Undistributed Foreign Earnings Deemed To Be Repatriated					15,910
Additional Income Tax Provision For Remaining Undistributed Foreign Earnings					0
Income tax benefit due to remeasurement of deferred tax assets and liabilities					$ 8,966

Accumulated Other Comprehensi62

Accumulated Other Comprehensive Income (Loss) (Changes in AOCI by Component) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated foreign currency translation at beginning of period			$ (83,166)
Other comprehensive income (loss) before reclassifications - Foreign currency translation			30,661
Amounts reclassified from AOCIL - Foreign currency translation			0
Other comprehensive income (loss) - Foreign currency translation			30,661
Accumulated foreign currency translation at end of period	$ (52,505)		(52,505)
Accumulated retirement liability at beginning of period			(251,865)
Other comprehensive income (loss) before reclassifications - Retirement liability			(1,222)
Amounts reclassified from AOCIL - Retirement liability	5,541	$ 6,002	10,160	$ 12,011
Other comprehensive income (loss) retirement liability	4,682	5,471	8,938	14,043
Accumulated retirement liability at end of period	(290,136)		(290,136)
Accumulated loss on derivatives at beginning of period			(460)
Other comprehensive income (loss) before reclassification - Derivatives	(769)	(138)	136	(970)
Amounts reclassified from AOCIL - Derivatives	190	1,384	519	2,790
Other comprehensive income (loss) - Derivatives	(579)	1,246	655	1,820
Accumulated loss on derivatives at end of period	327		327
Accumulated other comprehensive loss at beginning of period			(335,491)
Other comprehensive income (loss) before reclassifications - Total			29,575
Amounts reclassified from AOCIL - Total			10,679
Other comprehensive income (loss), net of tax	24,400	19,412	40,254	(12,951)
Tax Cuts and Jobs Act, reclassification from AOCIL to retained earnings	(47,077)	$ 0	(47,077)	$ 0
Accumulated other comprehensive loss at end of period	$ (342,314)		(342,314)
Accumulated foreign currency translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Tax Cuts and Jobs Act, reclassification from AOCIL to retained earnings			0
Accumulated retirement liability
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Tax Cuts and Jobs Act, reclassification from AOCIL to retained earnings			(47,209)
Accumulated gain (loss) on derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Tax Cuts and Jobs Act, reclassification from AOCIL to retained earnings			$ 132

Accumulated Other Comprehensi63

Accumulated Other Comprehensive Income (Loss) (Reclassification from AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Prior service cost (credit)	$ (86)	$ 20	$ (171)	$ 39
Actuarial losses	7,423	9,406	14,819	18,823
Reclassification from AOCIL into earnings	7,337	9,426	14,648	18,862
Tax effect	(1,796)	(3,424)	(4,488)	(6,851)
Net reclassification from AOCIL into earnings	5,541	6,002	10,160	12,011
Reclassification from AOCIL into earnings	262	1,884	826	3,763
Tax effect	(72)	(500)	(307)	(973)
Net reclassification from AOCIL into earnings	190	1,384	519	2,790
Foreign Currency Contracts | Sales
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Derivatives	(138)	1,157	(256)	2,454
Foreign Currency Contracts | Cost Of Sales
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Derivatives	502	664	1,198	1,131
Interest Rate Swaps | Interest
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Derivatives	$ (102)	$ 63	$ (116)	$ 178

Accumulated Other Comprehensi64

Accumulated Other Comprehensive Income (Loss) (Activity and Classification of Derivative Deferral in AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Derivative Instruments, Gain (Loss)
Net gain (loss)	$ (1,025)	$ (254)	$ 420	$ (1,346)
Tax effect	256	116	(284)	376
Net deferral in AOCIL of derivatives	(769)	(138)	136	(970)
Foreign Currency Contracts
Derivative Instruments, Gain (Loss)
Net deferral in AOCIL of derivatives (effective portion)	(1,655)	(323)	(827)	(2,109)
Interest Rate Swaps
Derivative Instruments, Gain (Loss)
Net deferral in AOCIL of derivatives (effective portion)	$ 630	$ 69	$ 1,247	$ 763

Earnings Per Share (Basic And D

Earnings Per Share (Basic And Diluted Weighted-Average Shares Outstanding) (Details) - shares	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Earnings Per Share [Abstract]
Basic weighted-average shares outstanding	35,770,089	35,888,053	35,771,247	35,878,552
Dilutive effect of equity-based awards	409,769	348,785	419,208	376,250
Diluted weighted-average shares outstanding	36,179,858	36,236,838	36,190,455	36,254,802

Earnings Per Share (Narrative)

Earnings Per Share (Narrative) (Details) - $ / shares	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Earnings Per Share [Abstract]
Antidilutive securities excluded from calculation of diluted earnings per share	21,887	99,978	17,432	107,960
Dividends declared per share	$ 0.25	$ 0	$ 0.25	$ 0

Segment Information (Narrative)

Segment Information (Narrative) (Details) $ in Thousands	Oct. 01, 2017	Mar. 31, 2018USD ($)	Sep. 30, 2017USD ($)
Segment Reporting Information
Number of Reportable Segments	3
Segment Assets		$ 3,102,757	$ 3,090,592
Space And Defense Controls
Segment Reporting Information
Segment Assets		627,000
Industrial Systems
Segment Reporting Information
Segment Assets		$ 1,229,000

Segment Information (Sales And

Segment Information (Sales And Operating Profit By Segment And Reconciliation Of Segment Operating Profit To Earnings Before Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Net sales:
Net sales	$ 689,049	$ 632,403	$ 1,316,584	$ 1,222,073
Operating profit (loss):
Operating profit (loss)	44,271	64,827	110,574	117,189
Deductions from operating profit:
Interest expense	9,089	8,649	17,735	17,135
Equity-based compensation expense	1,499	986	3,500	3,154
Corporate expenses and other, net	8,014	6,989	15,836	12,209
Earnings before income taxes	25,669	48,203	73,503	84,691
Aircraft Controls
Net sales:
Net sales	311,439	289,661	589,973	558,111
Operating profit (loss):
Operating profit (loss)	33,480	31,181	64,248	54,292
Space And Defense Controls
Net sales:
Net sales	143,527	138,834	276,920	261,424
Operating profit (loss):
Operating profit (loss)	16,841	11,381	33,130	20,469
Industrial Systems
Net sales:
Net sales	234,083	203,908	449,691	402,538
Operating profit (loss):
Operating profit (loss)	$ (6,050)	$ 22,265	$ 13,196	$ 42,428

Segment Information (Reconcilia

Segment Information (Reconciliation of Revenue from Segments to Consolidated) (Details) - Net sales - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Apr. 01, 2017	Apr. 01, 2017
Segment Reporting, Revenue Reconciling Item
Prior period reclassification adjustment	$ 121,463	$ 237,354
Space And Defense Controls
Segment Reporting, Revenue Reconciling Item
Prior period reclassification adjustment	32,986	62,646
Industrial Systems
Segment Reporting, Revenue Reconciling Item
Prior period reclassification adjustment	$ 88,477	$ 174,708

Segment Information (Reconcil70

Segment Information (Reconciliation of Operating Profit from Segments to Consolidated) (Details) - Operating Income (Loss) [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Apr. 01, 2017	Apr. 01, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated
Prior period reclassification adjustment	$ 10,840	$ 22,294
Space And Defense Controls
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated
Prior period reclassification adjustment	893	2,885
Industrial Systems
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated
Prior period reclassification adjustment	$ 9,947	$ 19,409

Related Party Transactions (Nar

Related Party Transactions (Narrative) (Details) $ in Thousands	6 Months Ended
	Mar. 31, 2018USD ($)
Related Party Transaction
Related Party US Revolving Credit Facility Interest Percentage	12.00%
M&T Bank | Credit Extension on Routine Purchases
Related Party Transaction
Related Party Transaction, Amounts of Transaction	$ 11,218
M&T Bank | Interest Rate Swaps
Related Party Transaction
Related Party Transaction, Amounts of Transaction	15,000
M&T Bank | Lease Agreements
Related Party Transaction
Related Party Transaction, Amounts of Transaction	$ 27,516

Commitments and Contingencies (

Commitments and Contingencies (Narrative) (Details) $ in Thousands	Mar. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Standby letters of credit	$ 47,418