10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

for the quarterly period ended March 28, 2020

☐ Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from             to            

Commission File Number 001-32833

TransDigm Group Incorporated

(Exact name of registrant as specified in its charter)

Delaware

(State or other jurisdiction of incorporation or organization)

41-2101738

(I.R.S. Employer Identification No.)

1301 East 9th Street,	Suite 3000,	Cleveland,	Ohio	44114
(Address of principal executive offices)				(Zip Code)

(216) 706-2960

(Registrant’s telephone number, including area code)

(Former name, former address and former fiscal year, if changed since last report.)

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

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ☒    No  ☐

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

Large Accelerated Filer	☒	Accelerated Filer	☐
Non-Accelerated Filer	☐	Smaller Reporting Company	☐
Emerging Growth Company	☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.			☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

Securities registered pursuant to Section 12(b) of the Act:
Title of each class:	Trading Symbol:	Name of each exchange on which registered:
Common Stock, $0.01 par value	TDG	New York Stock Exchange

The number of shares outstanding of TransDigm Group Incorporated’s common stock, par value $.01 per share, was 54,072,319 as of April 27, 2020.

INDEX

			Page
Part I		FINANCIAL INFORMATION
	Item 1	Financial Statements
		Condensed Consolidated Balance Sheets – March 28, 2020 and September 30, 2019	1
		Condensed Consolidated Statements of Income – Thirteen and Twenty-Six Week Periods Ended March 28, 2020 and March 30, 2019	2
		Condensed Consolidated Statements of Comprehensive Income – Thirteen and Twenty-Six Week Periods Ended March 28, 2020 and March 30, 2019	3
		Condensed Consolidated Statements of Changes in Stockholders’ Deficit – Thirteen and Twenty-Six Week Periods Ended March 28, 2020 and March 30, 2019	4
		Condensed Consolidated Statements of Cash Flows – Twenty-Six Week Periods Ended March 28, 2020 and March 30, 2019	6
		Notes to Condensed Consolidated Financial Statements	7
	Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	36
	Item 3	Quantitative and Qualitative Disclosure About Market Risk	54
	Item 4	Controls and Procedures	54
Part II		OTHER INFORMATION	55
	Item 1	Legal Proceedings	55
	Item 1A	Risk Factors	55
	Item 2	Unregistered Sales of Equity Securities and Use of Proceeds	55
	Item 6	Exhibits	57
SIGNATURES			58

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATED BALANCE SHEETS

(Amounts in millions, except share amounts)

(Unaudited)

	March 28, 2020			September 30, 2019
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	2,668		$	1,467
Trade accounts receivable—Net	999			1,068
Inventories—Net	1,313			1,233
Assets held-for-sale	—			962
Prepaid expenses and other	220			135
Total current assets	5,200			4,865
PROPERTY, PLANT AND EQUIPMENT—NET	748			757
GOODWILL	7,846			7,820
OTHER INTANGIBLE ASSETS—NET	2,669			2,744
DEFERRED INCOME TAXES	13			—
OTHER	159			69
TOTAL ASSETS	$	16,635		$	16,255
LIABILITIES AND STOCKHOLDERS’ DEFICIT
CURRENT LIABILITIES:
Current portion of long-term debt	$	279		$	80
Short-term borrowings—trade receivable securitization facility	350			350
Accounts payable	266			276
Accrued liabilities	761			675
Liabilities held-for-sale	—			157
Total current liabilities	1,656			1,538
LONG-TERM DEBT	17,933			16,469
DEFERRED INCOME TAXES	385			441
OTHER NON-CURRENT LIABILITIES	866			691
Total liabilities	20,840			19,139
TD GROUP STOCKHOLDERS’ DEFICIT:
Common stock - $.01 par value; authorized 224,400,000 shares; issued 58,233,574 and 57,623,311 at March 28, 2020 and September 30, 2019, respectively	1			1
Additional paid-in capital	1,488			1,379
Accumulated deficit	(4,401		)	(3,120		)
Accumulated other comprehensive loss	(503		)	(379		)
Treasury stock, at cost; 4,198,226 and 4,161,326 shares at March 28, 2020 and September 30, 2019, respectively	(794		)	(775		)
Total TD Group stockholders’ deficit	(4,209		)	(2,894		)
NONCONTROLLING INTERESTS	4			10
Total stockholders' deficit	(4,205		)	(2,884		)
TOTAL LIABILITIES AND STOCKHOLDERS’ DEFICIT	$	16,635		$	16,255

See Notes to Condensed Consolidated Financial Statements

1

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(Amounts in millions, except per share amounts)

(Unaudited) 

	Thirteen Week Periods Ended					Twenty-Six Week Periods Ended
	March 28, 2020			March 30, 2019		March 28, 2020			March 30, 2019
NET SALES	$	1,443		$	1,168	$	2,908		$	2,161
COST OF SALES	625			518		1,288			947
GROSS PROFIT	818			650		1,620			1,214
SELLING AND ADMINISTRATIVE EXPENSES	180			160		381			282
AMORTIZATION OF INTANGIBLE ASSETS	46			22		86			42
INCOME FROM OPERATIONS	592			468		1,153			890
INTEREST EXPENSE - NET	252			202		501			374
REFINANCING COSTS	3			3		26			3
OTHER INCOME	—			—		(3		)	—
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	337			263		629			513
INCOME TAX PROVISION	14			63		73			117
INCOME FROM CONTINUING OPERATIONS	323			200		556			396
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX	(4		)	2		68			2
NET INCOME	319			202		624			398
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—		(1		)	—
NET INCOME ATTRIBUTABLE TO TD GROUP	$	319		$	202	$	623		$	398
NET INCOME APPLICABLE TO TD GROUP COMMON STOCKHOLDERS	$	319		$	202	$	438		$	374
Earnings per share attributable to TD Group common stockholders:
Earnings per share from continuing operations - basic and diluted	$	5.63		$	3.56	$	6.45		$	6.61
(Loss) Earnings per share from discontinued operations - basic and diluted	(0.07		)	0.04		1.18			0.04
Earnings per share	$	5.56		$	3.60	$	7.63		$	6.65
Cash dividends declared per common share	$	—		$	—	$	32.50		$	—
Weighted-average shares outstanding:
Basic and diluted	57.4			56.3		57.4			56.3

See Notes to Condensed Consolidated Financial Statements

2

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Amounts in millions)

(Unaudited)

	Thirteen Week Periods Ended						Twenty-Six Week Periods Ended
	March 28, 2020			March 30, 2019			March 28, 2020			March 30, 2019
Net income	$	319		$	202		$	624		$	398
Less: Net income attributable to noncontrolling interests	—			—			(1		)	—
Net income attributable to TD Group	$	319		$	202		$	623		$	398
Other comprehensive (loss) income, net of tax:
Foreign currency translation	(106		)	(13		)	(8		)	(24		)
Unrealized loss on derivatives	(145		)	(63		)	(122		)	(137		)
Pensions and other postretirement benefits	—			—			6			—
Other comprehensive loss, net of tax, attributable to TD Group	(251		)	(76		)	(124		)	(161		)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO TD GROUP	$	68		$	126		$	499		$	237

See Notes to Condensed Consolidated Financial Statements

3

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ DEFICIT

(Amounts in millions, except share amounts)

(Unaudited)

	TD Group Stockholders
	Common Stock			Additional Paid-In Capital					Accumulated Other Comprehensive Income (Loss)			Treasury Stock
	Number of Shares	Par Value				Accumulated Deficit						Number of Shares		Value			Non-controlling Interests		Total
BALANCE, SEPTEMBER 30, 2018	56,895,686	$	1	$	1,209	$	(2,247	)	$	4		(4,161,326	)	$	(775	)	$	—	$	(1,808	)
Cumulative effect of ASC 606 and ASU 2016-16, adopted October 1, 2018	—	—		—		3			—			—		—			—		3
Accrued unvested dividend equivalents and other	—	—		—		(3		)	—			—		—			—		(3		)
Compensation expense recognized for employee stock options	—	—		16		—			—			—		—			—		16
Exercise of employee stock options	109,695	—		14		—			—			—		—			—		14
Net income attributable to TD Group	—	—		—		196			—			—		—			—		196
Foreign currency translation adjustments, net of tax	—	—		—		—			(11		)	—		—			—		(11		)
Unrealized (loss) gain on derivatives, net of tax	—	—		—		—			(74		)	—		—			—		(74		)
BALANCE, DECEMBER 29, 2018	57,005,381	$	1	$	1,239	$	(2,051	)	$	(81	)	(4,161,326	)	$	(775	)	$	—	$	(1,667	)
Noncontrolling interests assumed related to acquisitions	—	—		—		—			—			—		—			9		9
Accrued unvested dividend equivalents and other	—	—		—		(2		)	—			—		—			—		(2		)
Compensation expense recognized for employee stock options	—	—		19		—			—			—		—			—		19
Exercise of employee stock options	298,240	—		33		—			—			—		—			—		33
Common stock issued	476	—		—		—			—			—		—			—		—
Net income attributable to TD Group	—	—		—		202			—			—		—			—		202
Foreign currency translation adjustments, net of tax	—	—		—		—			(13		)	—		—			—		(13		)
Unrealized (loss) gain on derivatives, net of tax	—	—		—		—			(63		)	—		—			—		(63		)
BALANCE, MARCH 30, 2019	57,304,097	$	1	$	1,291	$	(1,851	)	$	(157	)	(4,161,326	)	$	(775	)	$	9	$	(1,482	)

See Notes to Condensed Consolidated Financial Statements

4

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ DEFICIT

(Amounts in millions, except share amounts)

(Unaudited)

	TD Group Stockholders
	Common Stock			Additional Paid-In Capital					Accumulated Other Comprehensive (Loss) Income			Treasury Stock
	Number of Shares	Par Value				Accumulated Deficit						Number of Shares		Value			Non-controlling Interests			Total
BALANCE, SEPTEMBER 30, 2019	57,623,311	$	1	$	1,379	$	(3,120	)	$	(379	)	(4,161,326	)	$	(775	)	$	10		$	(2,884	)
Noncontrolling interests attributable to divestiture	—	—		—		—			—			—		—			(6		)	(6		)
Special dividends and vested dividend equivalents declared	—	—		—		(1,864		)	—			—		—			—			(1,864		)
Accrued unvested dividend equivalents and other	—	—		—		(19		)	—			—		—			—			(19		)
Compensation expense recognized for employee stock options	—	—		23		—			—			—		—			—			23
Exercise of employee stock options	169,470	—		20		—			—			—		—			—			20
Net income attributable to TD Group	—	—		—		304			—			—		—			—			304
Foreign currency translation adjustments, net of tax	—	—		—		—			98			—		—			—			98
Unrealized (loss) gain on derivatives, net of tax	—	—		—		—			23			—		—			—			23
Pensions and other postretirement benefits adjustments, net of tax	—	—		—		—			6			—		—			—			6
BALANCE, DECEMBER 28, 2019	57,792,781	$	1	$	1,422	$	(4,699	)	$	(252	)	(4,161,326	)	$	(775	)	$	4		$	(4,299	)
Accrued unvested dividend equivalents and other	—	—		—		(21		)	—			—		—			—			(21		)
Compensation expense recognized for employee stock options	—	—		17		—			—			—		—			—			17
Exercise of employee stock options	440,793	—		49		—			—			—		—			—			49
Treasury stock purchased	—	—		—		—			—			(36,900	)	(19		)	—			(19		)
Net income attributable to TD Group	—	—		—		319			—			—		—			—			319
Foreign currency translation adjustments, net of tax	—	—		—		—			(106		)	—		—			—			(106		)
Unrealized (loss) gain on derivatives, net of tax	—	—		—		—			(145		)	—		—			—			(145		)
BALANCE, MARCH 28, 2020	58,233,574	$	1	$	1,488	$	(4,401	)	$	(503	)	(4,198,226	)	$	(794	)	$	4		$	(4,205	)

See Notes to Condensed Consolidated Financial Statements

5

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Amounts in millions)

(Unaudited)

	Twenty-Six Week Periods Ended
	March 28, 2020			March 30, 2019
OPERATING ACTIVITIES:
Net income	$	624		$	398
Net income from discontinued operations	(68		)	(2		)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	55			32
Amortization of intangible assets	86			42
Amortization of debt issuance costs, original issue discount and premium	16			13
Amortization of inventory step-up	—			20
Amortization of loss contract reserves	(25		)	(5		)
Refinancing costs	26			3
Non-cash equity compensation	37			38
Deferred income taxes	(9		)	(7		)
Changes in assets/liabilities, net of effects from acquisitions of businesses:
Trade accounts receivable	74			(7		)
Inventories	(97		)	(45		)
Income taxes receivable/payable	(73		)	16
Other assets	(32		)	(54		)
Accounts payable	(12		)	1
Accrued interest	68			28
Accrued and other liabilities	(76		)	(18		)
Net cash provided by operating activities	594			453
INVESTING ACTIVITIES:
Capital expenditures	(50		)	(44		)
Payments made in connection with acquisitions, net of cash acquired	—			(3,569		)
Proceeds in connection with the sale of discontinued operations, net	904			—
Net cash provided by (used in) investing activities	854			(3,613		)
FINANCING ACTIVITIES:
Proceeds from exercise of stock options	69			47
Dividends and dividend equivalent payments	(1,928		)	(24		)
Treasury stock purchased	(19		)	—
Proceeds from revolving credit facility	200			—
Repayments on term loans	(19		)	(38		)
Cash tender and redemption of senior subordinated notes due 2020	—			(550		)
Redemption of senior subordinated notes due 2022, net	(1,168		)	—
Proceeds from 5.50% senior subordinated notes due 2027, net	2,625			—
Proceeds from senior subordinated notes, net	—			545
Proceeds from senior secured notes due 2026, net	—			3,937
Financing fees and other, net	(8		)	(2		)
Net cash (used in) provided by financing activities	(248		)	3,915
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	1			1
NET INCREASE IN CASH AND CASH EQUIVALENTS	1,201			756
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	1,467			2,073
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	2,668		$	2,829
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for interest	$	424		$	365
Cash paid during the period for income taxes, net of refunds	$	183		$	121

See Notes to Condensed Consolidated Financial Statements

6

TRANSDIGM GROUP INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

TWENTY-SIX WEEK PERIODS ENDED MARCH 28, 2020 AND MARCH 30, 2019

(UNAUDITED)

1.    DESCRIPTION OF THE BUSINESS

Description of the Business – TransDigm Group Incorporated (“TD Group”), through its wholly-owned subsidiary, TransDigm Inc., is a leading global designer, producer and supplier of highly engineered aircraft components for use on nearly every commercial and military aircraft in service today. TransDigm Inc., along with TransDigm Inc.’s direct and indirect wholly-owned operating subsidiaries (collectively, with TD Group, the “Company” or “TransDigm”), offers a broad range of proprietary aerospace components. TD Group has no significant assets or operations other than its 100% ownership of TransDigm Inc. TD Group’s common stock is listed on the New York Stock Exchange, or the NYSE, under the trading symbol “TDG.”

TransDigm's major product offerings, substantially all of which are ultimately provided to end-users in the aerospace industry, include mechanical/electro-mechanical actuators and controls, ignition systems and engine technology, specialized pumps and valves, power conditioning devices, specialized AC/DC electric motors and generators, NiCad batteries and chargers, engineered latching and locking devices, rods and locking devices, engineered connectors and elastomers, databus and power controls, cockpit security components and systems, specialized cockpit displays, aircraft audio systems, specialized lavatory components, seat belts and safety restraints, engineered interior surfaces and related components, advanced sensor products, switches and relay panels, advanced displays, thermal protection and insulation, lighting and control technology, military personnel parachutes, high performance hoists, winches and lifting devices, and cargo loading, handling and delivery systems.

2.    UNAUDITED INTERIM FINANCIAL INFORMATION

The financial information included herein is unaudited; however, the information reflects all adjustments (consisting of normal recurring adjustments) that are, in the opinion of management, necessary for a fair presentation of the Company’s financial position and results of operations and cash flows for the interim periods presented. These financial statements and notes should be read in conjunction with the financial statements and related notes for the year ended September 30, 2019 included in TD Group’s Form 10-K filed on November 19, 2019. As disclosed therein, the Company’s annual consolidated financial statements were prepared in conformity with generally accepted accounting principles in the United States (“US GAAP”). The September 30, 2019 condensed consolidated balance sheet was derived from TD Group’s audited financial statements. The results of operations for the twenty-six week period ended March 28, 2020 are not necessarily indicative of the results to be expected for the full year.

Historical information has been retrospectively adjusted to reflect the classification of discontinued operations. Discontinued operations are further described in Note 3, "Acquisitions and Divestitures," and Note 18, "Discontinued Operations."

3.    ACQUISITIONS AND DIVESTITURES

During the fiscal year ended September 30, 2019, the Company completed the acquisitions of Esterline Technologies Corporation ("Esterline") and substantially all of the assets and technical data rights of the Stormscope product line from L3Harris Technologies, Inc. ("Stormscope") and NavCom Defense Electronics ("NavCom"). The Company accounted for the acquisitions using the acquisition method and included the results of operations of the acquisitions in its condensed consolidated financial statements from the effective date of each acquisition.

The acquisitions strengthen and expand the Company’s position to design, produce and supply highly engineered proprietary aerospace components in niche markets with significant aftermarket content and provide opportunities to create value through the application of our three core value-driven operating strategies (obtaining profitable new business, improving our cost structure, and providing highly engineered value-added products to customers). The purchase price paid for each acquisition reflects the current earnings before interest, taxes, depreciation and amortization (EBITDA) and cash flows, as well as the future EBITDA and cash flows expected to be generated by the business, which are driven in most cases by the recurring aftermarket consumption over the life of a particular aircraft, estimated to be approximately 25 to 30 years.

7

Acquisitions

Esterline – On March 14, 2019, TransDigm completed the acquisition of all the outstanding stock of Esterline for $122.50 per share in cash, plus the payoff of Esterline debt. The purchase price, net of cash acquired of approximately $398.2 million, totaled approximately $3,923.9 million. Of the $3,923.9 million purchase price, $3,536.3 million was paid at closing and the remaining $387.6 million was classified as restricted cash for the redemption of the outstanding senior notes due 2023 (herein the "2023 Notes"). The 2023 Notes were redeemed on April 15, 2019. Esterline, through its subsidiaries, was an industry leader in specialized manufacturing for the aerospace and defense industry primarily within three core disciplines: advanced materials, avionics and controls and sensors and systems. The acquisition of Esterline expands TransDigm's platform of proprietary and sole source content for the aerospace and defense industry. TransDigm evaluated the strategic fit and description of each Esterline reporting unit to determine the appropriate business segment for the reporting unit. Each Esterline reporting unit is included in one of TransDigm's segments: Power and Control, Airframe, or Non-aviation. Refer to Note 13, "Segments," for additional information about the Company's segments.

The total purchase price of Esterline was allocated to the underlying assets acquired and liabilities assumed based upon the respective fair value at the date of acquisition. To the extent the purchase price exceeded the fair value of the net identifiable tangible and intangible assets acquired, such excess was allocated to goodwill. Allocations are based on the acquisition method of accounting and third-party valuation appraisals.

Except where otherwise noted in the notes to the condensed consolidated financial statements, changes in balances and activity where comparable periods are presented in the condensed consolidated financial statements were generally driven by the Esterline acquisition.

The allocation of the fair value of the assets acquired and liabilities assumed in the Esterline acquisition as of the acquisition date of March 14, 2019 is summarized in the table below (in millions).

Assets acquired:
Trade accounts receivable	$	384
Inventories	583
Prepaid expenses and other	423
Property, plant, and equipment	469
Other intangible assets	1,301
Goodwill	2,256
Other	20
Total assets acquired	5,436
Liabilities assumed:
Accounts payable	146
Accrued liabilities	751
Other non-current liabilities	615
Total liabilities assumed	1,512
Net assets acquired	$	3,924

Of the approximately $2.3 billion of goodwill recognized for the acquisition, approximately $25.6 million is deductible for tax purposes. Also, of the approximately $1.3 billion of other intangible assets recognized for the acquisition, approximately $48.9 million is deductible for tax purposes.

8

In connection with the Esterline acquisition, we acquired existing long-term contracts with customers that were incurring gross margin losses as of the date of acquisition. Based on our review of these contracts, we concluded that the terms of certain of these loss-making contracts were unfavorable when compared to market terms as of the acquisition date. As a result, we recognized loss contract reserves as of the acquisition date of $267.9 million based on the present value of the difference between the contractual cash flows of the existing long-term contracts and the estimated cash flows had the contracts been executed at market terms as of the acquisition date. These adjustments apply only to contracts generating a margin as of the date of acquisition. As of September 30, 2019, we reclassified $9.3 million in loss contract reserves to liabilities held-for-sale, as it pertained to Souriau-Sunbank. Significant assumptions used to determine the fair value of the loss contract reserves using the discounted cash flow model include discount rates, forecasted quantities of products to be sold under the long-term contracts and market prices for respective products. While the Company conservatively selected values for these assumptions, they are forward looking and could be affected by future economic and market conditions. The loss contract reserves are amortized and recorded as an offset to cost of sales over the life of the contracts as actual sales occur under the long-term contracts. Approximately $19.8 million was amortized and recorded as an offset to cost of sales in the condensed consolidated statement of income for the twenty-six week period ended March 28, 2020. Total loss contract reserves related to the Esterline acquisition are $211.1 million and $231.8 million at March 28, 2020 and September 30, 2019, respectively, of which $64.3 million and $60.0 million is classified in accrued liabilities and $146.8 million and $171.8 million is classified in other non-current liabilities in the condensed consolidated balance sheets at March 28, 2020 and September 30, 2019, respectively.

Extant Acquisitions – On August 30, 2019, the Company's Extant subsidiary completed the acquisition of substantially all of the assets and technical data rights of the Stormscope product line from L3Harris Technologies, Inc. for approximately $20 million in cash. Stormscope is a lightning detection system for the general aviation and business jet markets. Stormscope is included as a product line of Extant, which is included in TransDigm's Power and Control segment. The Company expects that approximately $11.1 million of goodwill recognized for the acquisition and approximately $7.5 million of other intangible assets recognized for the acquisition will be deductible for tax purposes over 15 years.

On October 1, 2018, the Company's Extant subsidiary completed the acquisition of substantially all of the assets and technical data rights from the Corona, California operations of NavCom for approximately $27 million in cash. NavCom develops, manufactures, and supports high-reliability, mission-critical electronics, avionics and sub-assemblies. NavCom is included as a product line of Extant, which is included in TransDigm's Power and Control segment. Approximately $9.0 million of goodwill recognized for the acquisition is deductible for tax purposes over 15 years.

Pro forma net sales and results of operations for the Extant acquisitions had they occurred at the beginning of the applicable twenty-six week periods ended March 28, 2020 and March 30, 2019 are not material and, accordingly, are not provided.

Divestitures

Souriau-Sunbank – On December 20, 2019, TransDigm completed the divestiture of the Souriau-Sunbank Connection Technologies business (“Souriau-Sunbank”) with Eaton Corporation plc (“Eaton”) for approximately $920 million. Souriau-Sunbank was acquired by TransDigm as part of its acquisition of Esterline in March 2019.

Esterline Interface Technology Group – On September 20, 2019, TransDigm completed the divestiture of its Esterline Interface Technology (“EIT”) group of businesses to an affiliate of KPS Capital Partners, LP for approximately $190 million, which included a working capital settlement of $0.7 million that was paid in February 2020. EIT was acquired by TransDigm as part of its acquisition of Esterline in March 2019.

Refer to Note 18, "Discontinued Operations," for further information on the Company's divestitures.

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4.    RECENT ACCOUNTING PRONOUNCEMENTS

In February 2016, the FASB issued ASU 2016-02, “Leases (ASC 842),” which requires lessees to recognize a right-of-use asset and lease liability for all leases with a term of more than 12 months. ASU 2016-02 was effective for the Company on October 1, 2019, and required a modified retrospective application. In July 2018, the FASB issued ASU 2018-11, “Leases (ASC 842) Targeted Improvements,” which provided an additional transition method that allowed entities to initially apply the new standard at the adoption date and recognize a cumulative effect adjustment to the opening balance of retained earnings in the period of adoption without restating prior periods. The Company has completed the necessary changes to the consolidated financial statements and related disclosures, internal controls, financial policies and information systems. On October 1, 2019, the Company adopted ASC 842 and related amendments using the modified retrospective method. Results for reporting periods beginning after October 1, 2019, are presented under ASC 842, while prior period amounts continue to be reported under ASC 840, “Leases." The Company elected to apply the package of practical expedients permitted within the new standard, which among other things, allows the carry forward of historical lease classification of existing leases. Additionally, the adoption of the new standard resulted in the recording of lease assets and lease liabilities for operating leases of $99 million and $105 million, respectively, as of October 1, 2019. The effects of our transition to ASC 842 resulted in no cumulative adjustment to retained earnings in the period of adoption. The adoption of the standard did not have a material impact on our condensed consolidated statements of income or cash flows. Refer to Note 16, "Leases," for additional information.

In June 2016, the FASB issued ASU 2016-13, "Financial Instruments—Credit Losses: Measurement of Credit Losses on Financial Instruments (ASU 2016-13)," which changes the impairment model for most financial assets. The new model uses a forward-looking expected loss method, which will generally result in earlier recognition of allowances for losses. ASU 2016-13 is effective for the Company for annual and interim periods beginning after October 1, 2020 and early adoption is permitted. The Company is currently evaluating the impact of adopting this standard on our consolidated financial statements and disclosures.

In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment,” to eliminate Step 2 from the goodwill impairment test in order to simplify the subsequent measurement of goodwill. The guidance is effective for the Company for fiscal years beginning after October 1, 2020, with early adoption permitted. The adoption of this standard is not expected to have a material impact on our consolidated financial statements and disclosures.

In December 2019, the FASB issued ASU 2019-12, “Income Taxes (ASC 740) - Simplifying the Accounting for Income Taxes,” which simplifies the accounting for income taxes by removing certain exceptions to the general principles in ASC 740. The amendments also improve consistent application of and simplify US GAAP for other areas of ASC 740 by clarifying and amending existing guidance. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption of the amendments is permitted, including adoption in any interim period for which financial statements have not yet been issued. Depending on the amendment, adoption may be applied on the retrospective, modified retrospective or prospective basis. The Company is currently evaluating the impact of adopting this standard on our consolidated financial statements and disclosures.

5.    REVENUE RECOGNITION

TransDigm's sales are concentrated in the aerospace industry. The Company’s customers include: distributors of aerospace components, commercial airlines, large commercial transport and regional and business aircraft OEMs, various armed forces of the United States and friendly foreign governments, defense OEMs, system suppliers, and various other industrial customers.

The majority of the Company's revenue is recorded at a point in time. Revenue is recognized from the sale of products when control transfers to the customer, which is demonstrated by our right to payment, a transfer of title, a transfer of the risk and rewards of ownership, or the customer acceptance, but most frequently upon shipment where the customer obtains physical possession of the goods.

In some contracts, control transfers to the customer over time, primarily in contracts where the customer is required to pay for the cost of both the finished and unfinished goods at the time of cancellation plus a reasonable profit relative to the work performed for products that were customized for the customer. Therefore, we recognize revenue over time for those agreements that have a right to margin and where the products being produced have no alternative use. 

Based on our production cycle, it is generally expected that goods related to the revenue will be shipped and billed within the current year. For revenue recognized over time, we estimate the amount of revenue attributable to a contract earned at a given point during the production cycle based on certain costs, such as materials and labor incurred to date, plus the expected profit, which is a cost-to-cost input method.

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The Company’s payment terms vary by the type and location of the customer and the products or services offered. The Company does not offer any payment terms that would meet the requirements for consideration as a significant financing component.

Shipping and handling fees and costs incurred in connection with products sold are recorded in cost of sales in the condensed consolidated statements of income, and are not considered a performance obligation to our customers.

The Company pays sales commissions that relate to contracts for products or services that are satisfied at a point in time or over a period of one year or less and are expensed as incurred. These costs are reported as a component of selling and administrative expenses in the unaudited condensed consolidated statements of income.

Contract Assets and Liabilities - Contract assets reflect revenue recognized and performance obligations satisfied in advance of customer billing or reimbursable costs related to a specific contract. Contract liabilities relate to payments received in advance of the satisfaction of performance under the contract. We receive payments from customers based on the terms established in our contracts. The following table summarizes our contract assets and liabilities balances (in millions):

	March 28, 2020		September 30, 2019		Change
Contract assets, current (1)	$	40	$	44	$	(4	)
Contract assets, non-current (2)	6		7		(1		)
Total contract assets	46		51		(5		)
Contract liabilities, current (3)	21		18		3
Contract liabilities, non-current (4)	15		13		2
Total contract liabilities	36		31		5
Net contract assets	$	10	$	20	$	(10	)

⁽¹⁾  Included in prepaid expenses and other on the condensed consolidated balance sheets.

⁽²⁾  Included in other non-current assets on the condensed consolidated balance sheets.

⁽³⁾  Included in accrued liabilities on the condensed consolidated balance sheets.

⁽⁴⁾  Included in other non-current liabilities on the condensed consolidated balance sheets.

For the thirteen and twenty-six week periods ended March 28, 2020, the revenue recognized that was previously included in contract liabilities was not material.

Refer to Note 13, “Segments,” for disclosures related to the disaggregation of revenue.

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6.    EARNINGS PER SHARE

The following table sets forth the computation of basic and diluted earnings per share (in millions, except per share data) using the two-class method:

	Thirteen Week Periods Ended					Twenty-Six Week Periods Ended
	March 28, 2020			March 30, 2019		March 28, 2020			March 30, 2019
Numerator for earnings per share:
Income from continuing operations	$	323		$	200	$	556		$	396
Less: Net income attributable to noncontrolling interests	—			—		(1		)	—
Net income from continuing operations attributable to TD Group	323			200		555			396
Less: Special dividends declared or paid on participating securities	—			—		(185		)	(24		)
	323			200		370			372
(Loss) income from discontinued operations, net of tax	(4		)	2		68			2
Net income applicable to TD Group common stockholders - basic and diluted	$	319		$	202	$	438		$	374
Denominator for basic and diluted earnings per share under the two-class method:
Weighted-average common shares outstanding	53.8			53.0		53.7			52.9
Vested options deemed participating securities	3.6			3.3		3.7			3.4
Total shares for basic and diluted earnings per share	57.4			56.3		57.4			56.3
Earnings per share from continuing operations - basic and diluted	$	5.63		$	3.56	$	6.45		$	6.61
(Loss) Earnings per share from discontinued operations - basic and diluted	(0.07		)	0.04		1.18			0.04
Earnings per share	$	5.56		$	3.60	$	7.63		$	6.65

7. INVENTORIES

Inventories are stated at the lower of cost or net realizable value. Cost of inventories is generally determined by the average cost and the first-in, first-out (FIFO) methods and includes material, labor and overhead related to the manufacturing process.

Inventories consist of the following (in millions):

	March 28, 2020			September 30, 2019
Raw materials and purchased component parts	$	867		$	805
Work-in-progress	389			360
Finished goods	208			192
Total	1,464			1,357
Reserves for excess and obsolete inventory	(151		)	(124		)
Inventories - Net	$	1,313		$	1,233

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8.    INTANGIBLE ASSETS

Other intangible assets - net in the condensed consolidated balance sheets consist of the following (in millions):

	March 28, 2020						September 30, 2019
	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Trademarks and trade names	$	954	$	—	$	954	$	956	$	—	$	956
Technology	1,829		542		1,287		1,806		496		1,310
Order backlog	90		65		25		107		45		62
Customer relationships	436		41		395		438		30		408
Other	18		10		8		17		9		8
Total	$	3,327	$	658	$	2,669	$	3,324	$	580	$	2,744

The aggregate amortization expense on identifiable intangible assets for the twenty-six week periods ended March 28, 2020 and March 30, 2019 was approximately $86 million and $42 million, respectively. The estimated amortization expense is $172 million for fiscal year 2020 and $115 million for each of the five succeeding fiscal years 2021 through 2025.

The following is a summary of changes in the carrying value of goodwill by segment from September 30, 2019 through March 28, 2020 (in millions):

	Power & Control			Airframe			Non- aviation			Total
Balance at September 30, 2019	$	4,121		$	3,598		$	101		$	7,820
Purchase price allocation adjustments	(14		)	51			(1		)	36
Currency translation adjustments	4			(14		)	—			(10		)
Balance at March 28, 2020	$	4,111		$	3,635		$	100		$	7,846

The purchase price allocation adjustments relate to opening balance sheet adjustments recorded by the sixteen reporting units acquired from Esterline.

Interim Impairment Evaluation

US GAAP requires that both indefinite-lived intangible assets and goodwill are tested for impairment annually and more frequently if events or changes in circumstances indicate that it is more likely than not (i.e., a likelihood greater than 50%) that the intangible asset or the reporting unit is impaired. Therefore, during interim periods, ASC 350 requires companies to focus on those events and circumstances that affect significant inputs used to determine the fair value of the asset, asset group or reporting unit to determine whether an interim quantitative impairment test is required. Given the adverse global economic and market conditions attributable to the novel strain of coronavirus (“COVID-19”) pandemic, particularly as it pertains to the commercial sector of the aerospace and defense industry, the Company determined that an interim impairment evaluation of goodwill and indefinite-lived intangible assets was necessary as of March 28, 2020 for certain reporting units in which it was concluded a potential impairment existed.

For the identified reporting units, a Step 1 impairment test was performed using an income approach based on management’s determination of the prospective financial information with consideration taken of the existing uncertainty in the global economy and aerospace and defense industry, particularly the commercial sector. Management also included projected declines and subsequent recovery in commercial OEM and aftermarket as a percentage of sales based on available industry data. The Company utilized a third party valuation firm to assist in the determination of the weighted average cost of capital. For each indefinite-lived intangible asset and reporting unit tested, the fair value sufficiently exceeded carrying value.

As a result of the interim impairment testing performed as of March 28, 2020, no indefinite-lived intangible assets or goodwill was determined to be impaired.

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9.    DEBT

The Company’s debt consists of the following (in millions):

	March 28, 2020
	Gross Amount		Debt Issuance Costs			Original Issue Discount or Premium			Net Amount
Short-term borrowings—trade receivable securitization facility	$	350	$	—		$	—		$	350
Term loans	$	7,503	$	(52	)	$	(24	)	$	7,427
Revolving credit facility	200		—			—			200
6.50% senior subordinated notes due 2024 (2024 Notes)	1,200		(5		)	—			1,195
6.50% senior subordinated notes due 2025 (2025 Notes)	750		(3		)	3			750
6.375% senior subordinated notes due 2026 (6.375% 2026 Notes)	950		(6		)	—			944
6.875% senior subordinated notes due 2026 (6.875% 2026 Notes)	500		(5		)	(3		)	492
6.25% secured notes due 2026 (2026 Secured Notes)	4,000		(55		)	2			3,947
7.50% senior subordinated notes due 2027 (7.50% 2027 Notes)	550		(5		)	—			545
5.50% senior subordinated notes due 2027 (5.50% 2027 Notes	2,650		(23		)	—			2,627
Government refundable advances	27		—			—			27
Finance lease obligations	58		—			—			58
	18,388		(154		)	(22		)	18,212
Less current portion	280		(1		)	—			279
Long-term debt	$	18,108	$	(153	)	$	(22	)	$	17,933

	September 30, 2019
	Gross Amount		Debt Issuance Costs			Original Issue Discount or Premium			Net Amount
Short-term borrowings—trade receivable securitization facility	$	350	$	—		$	—		$	350
Term loans	$	7,524	$	(58	)	$	(17	)	$	7,449
6.00% 2022 Notes	1,150		(4		)	—			1,146
6.50% 2024 Notes	1,200		(6		)	—			1,194
6.50% 2025 Notes	750		(3		)	3			750
6.375% 2026 Notes	950		(7		)	—			943
6.875% 2026 Notes	500		(6		)	(3		)	491
6.25% 2026 Secured Notes	4,000		(60		)	2			3,942
7.50% 2027 Notes	550		(5		)	—			545
Government refundable advances	39		—			—			39
Finance lease obligations	50		—			—			50
	16,713		(149		)	(15		)	16,549
Less current portion	81		(1		)	—			80
Long-term debt	$	16,632	$	(148	)	$	(15	)	$	16,469

Accrued interest, which is classified as a component of accrued liabilities, was $160.4 million and $92.6 million as of March 28, 2020 and September 30, 2019, respectively.

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Issuance of Senior Subordinated Notes due 2027 – On October 29, 2019, the Company entered into a purchase agreement in connection with a private offering of $2,650 million in new 5.50% senior subordinated notes due 2027 (herein the "5.50% 2027 Notes"). The 5.50% 2027 Notes were issued pursuant to an indenture, dated as of November 13, 2019, among TransDigm, as issuer, TransDigm Group, TransDigm UK and the other subsidiaries of TransDigm named therein, as guarantors.

The 5.50% 2027 Notes bear interest at the rate of 5.50% per annum, which accrues from November 13, 2019 and is payable in arrears on May 15th and November 15th of each year, commencing on May 15, 2020. The 5.50% 2027 Notes mature on November 15, 2027, unless earlier redeemed or repurchased, and are subject to the terms and conditions set forth in the indenture.

The Company capitalized $23.6 million and expensed $1.1 million of refinancing costs representing debt issuance costs associated with the 5.50% 2027 Notes during the twenty-six week period ended March 28, 2020.

Repurchase of Senior Subordinated Notes due 2022 – On October 29, 2019, the Company announced a cash tender offer for any and all of its 2022 Notes outstanding. On November 26, 2019, the Company redeemed the principal amount of $1,150 million, plus accrued interest of approximately $25.5 million and early redemption premium of $17.3 million.

The Company wrote off $3.8 million in unamortized debt issuance costs during the twenty-six week period ended March 28, 2020 in conjunction with the redemption of the 2022 Notes.

Amendment No. 7 and Refinancing Facility Agreement – On February 6, 2020, the Company entered into Amendment No. 7 and Refinancing Facility Agreement (herein, "Amendment No. 7") to the Second Amended and Restated Credit Agreement dated as of June 4, 2014 (herein, the "Credit Agreement").

Under the terms of Amendment No. 7, the Company, among other things, (i) incurred new tranche E term loans in an aggregate principal amount equal to approximately $2,216 million, new tranche F term loans in an aggregate principal amount equal to approximately $3,515 million and new tranche G term loans, (collectively, the "New Term Loans") in an aggregate principal amount equal to approximately $1,774 million, (ii) repaid in full all of the prior existing tranche E term loans, tranche F term loans and tranche G term loans outstanding under the Credit Agreement immediately prior to Amendment No. 7 and (iii) extend the maturity date of the new tranche F term loans to December 9, 2025. The New Term Loans were fully drawn on February 6, 2020. The LIBOR interest rate per annum applicable to the New Term Loans is 2.25%, a decrease from the 2.50% rate that applied to the previous existing term loans.

In addition to a discount of $8.8 million recorded in conjunction with the new tranche F term loans, the Company capitalized $1.6 million and expensed $1.9 million of refinancing costs representing debt issuance costs associated with Amendment No. 7 during the twenty-six week period ended March 28, 2020.

Revolving Credit Facility – On March 24, 2020, the Company drew $200 million on the revolving commitments. As of March 28, 2020, the Company had $41.7 million in letters of credit outstanding and $518.3 million of borrowings available under the revolving commitments. The Company intends to use the cash drawn for general corporate purposes. The Company utilizes letters of credit to back certain payment and performance obligations.

Subsequent Event - Issuance of Senior Secured Notes due 2025 – On April 8, 2020, the Company entered into a purchase agreement in connection with a private offering of $1,100 million in aggregate principal amount of 8.00% Senior Secured Notes due 2025 (herein the "8.00% 2025 Notes") at an issue price of 100% of the principal amount. The 8.00% 2025 Notes were issued pursuant to an indenture, dated as of April 8, 2020, amongst TransDigm, as issuer, TransDigm Group, TransDigm UK and the other subsidiaries of TransDigm named therein, as guarantors. The 8.00% 2025 Notes are secured by a first-priority security interest in substantially all the assets of TransDigm, TransDigm Group, TransDigm UK and each other guarantor on an equal and ratable basis with any other existing and future senior secured debt, including indebtedness under the Company's senior secured credit facilities and the 2026 Secured Notes.

The 8.00% 2025 Notes bear interest at the rate of 8.00% per annum, which accrues from April 8, 2020 and is payable in arrears on April 1 and October 1 of each year, commencing on October 1, 2020. The 8.00% 2025 Notes mature on December 15, 2025, unless earlier redeemed or repurchased, and are subject to the terms and conditions set forth in the indenture.

The Company intends to use the net proceeds from the offering of the 8.00% 2025 Notes for general corporate purposes, including increasing its liquidity.

15

Subsequent Event - Issuance of New Senior Secured Notes due 2026 – On April 17, 2020, the Company entered into a purchase agreement in connection with a private offering of $400 million in aggregate principal amount of 6.25% Senior Secured Notes due 2026 (herein the "6.25% 2026 New Notes") at an issue price of 101% of the principal amount. The 6.25% 2026 New Notes are an additional issuance of the Company's existing 6.25% 2026 Senior Secured Notes, and were issued under the indenture dated as of February 13, 2019 pursuant to which the Company previously issued $4,000 million aggregate principal amount of 6.25% Senior Secured Notes due 2026. The 6.25% 2026 New Notes, together with the 6.25% 2026 Secured Notes, will be treated as a single class for all purposes under the indenture. The 6.25% 2026 New Notes will be of the same class and series as, and otherwise identical to, the 6.25% 2026 Secured Notes other than with respect to the date of issuance and issue price.

The 6.25% 2026 New Notes bear interest at a rate of 6.25% per annum, which accrues from March 15, 2020 and is payable semiannually in arrears on March 15th and September 15th of each year, commencing on September 15, 2020. The 6.25% 2026 New Notes mature on March 15, 2026, unless earlier redeemed or repurchased, and are subject to the terms and conditions set forth in the indenture.

The Company intends to use the net proceeds from the offering of the 6.25% 2026 New Notes for general corporate purposes, including increasing its liquidity.

Government Refundable Advances - Government refundable advances consist of payments received from the Canadian government to assist in research and development related to commercial aviation. The requirement to repay this advance is solely based on year-over-year commercial aviation revenue growth at CMC Electronics, which is a subsidiary of TransDigm. These obligations were assumed in connection with the Esterline acquisition and the balance was $26.7 million at March 28, 2020 and $39.2 million at September 30, 2019.

Obligations under Finance Leases - The Company leases certain buildings and equipment under finance leases. These obligations were assumed in connection with the Esterline acquisition and the present value of the minimum capital lease payments, net of the current portion, represents a balance of $57.5 million at March 28, 2020 and $49.9 million at September 30, 2019. Refer to Note 16, "Leases," for further disclosure on the Company's finance lease obligations.

10.    INCOME TAXES

At the end of each reporting period, TD Group makes an estimate of its annual effective income tax rate. The estimate used in the year-to-date period may change in subsequent periods. On March 27, 2020, the President of the United States signed the Coronavirus Aid, Relief, and Economic Security ("CARES") Act, a substantial tax-and-spending package intended to provide additional economic stimulus to address the impact of the COVID-19 pandemic. The CARES Act, among other things, includes provisions relating to refundable payroll tax credits, deferment of employer social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, and modifications to the net interest deduction limitations. The most significant impact of the CARES Act for the Company is an increase of the IRC 163(j) Interest Disallowance Limitations from 30% to 50% of adjusted taxable income which will allow the Company to deduct additional interest for fiscal years 2020 and 2021. During the thirteen week periods ended March 28, 2020 and March 30, 2019, the effective income tax rate was 4.2% and 24.2%, respectively. During the twenty-six week periods ended March 28, 2020 and March 30, 2019, the effective income tax rate was 11.6% and 22.9%, respectively. The Company's lower effective tax rate for the thirteen and twenty-six week periods ended March 28, 2020 was primarily due to a discrete benefit recognized for excess tax benefits for share-based payments in addition to the modification of the interest expense limitation under IRC Section 163(j) enacted as part of the CARES Act, effective for TD Group beginning October 1, 2019. The Company's effective tax rate for the thirteen and twenty-six week periods ended March 28, 2020 was lower than the Federal statutory rate of 21% primarily due to a discrete benefit recognized for excess tax benefits for share-based payments, partially offset by our foreign earnings taxed at rates higher than the U.S. statutory rate. The Company’s effective tax rate for the thirteen and twenty-six week periods ended March 30, 2019 was slightly higher than the Federal statutory tax rate primarily resulting from a valuation allowance associated with our net interest expense limitation under IRC Section 163(j), foreign earnings taxed at rates higher than the U.S. statutory rate, partially offset by the benefit associated with FDII and excess tax benefits for share-based payments.

The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction and various state, local and foreign jurisdictions. The Company is currently under examination for its federal income taxes in the U.S. for fiscal 2016, in Belgium for fiscal years 2016 through 2018, in Canada for fiscal years 2013 through 2015, in France for fiscal years 2015 through 2018, and in Germany for fiscal years 2014 through 2017. The Company is no longer subject to U.S. federal examinations for years before fiscal year 2015. The Company is subject to state income tax examinations for fiscal years 2009 and later.

16

At March 28, 2020 and September 30, 2019, TD Group had $40.9 million and $36.5 million, respectively, in unrecognized tax benefits, the recognition of which would have an effect of approximately $36.2 million and $31.4 million on the effective tax rate at March 28, 2020 and September 30, 2019, respectively. The Company believes the tax positions that comprise the unrecognized tax benefits will be reduced by approximately $1.5 million over the next 12 months. The Company recognizes accrued interest and penalties related to unrecognized tax benefits as a component of income tax expense.

11.    FAIR VALUE MEASUREMENTS

The following table presents our assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

The following summarizes the carrying amounts and fair values of financial instruments (in millions):

		March 28, 2020				September 30, 2019
	Level	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets:
Cash and cash equivalents	1	$	2,668	$	2,668	$	1,467	$	1,467
Interest rate cap agreements (1)	2	—		—		1		1
Liabilities:
Interest rate swap agreements (3)	2	38		38		13		13
Interest rate swap agreements (4)	2	329		329		202		202
Foreign currency forward exchange contracts and other (3)	2	10		10		6		6
Short-term borrowings - trade receivable securitization facility (5)	1	350		350		350		350
Long-term debt, including current portion:
Term loans (5)	2	7,427		6,158		7,449		7,478
Revolving credit facility (5)	2	200		200		—		—
6.00% 2022 Notes (5)	1	—		—		1,146		1,167
6.50% 2024 Notes (5)	1	1,195		1,110		1,194		1,239
6.50% 2025 Notes (5)	1	750		694		750		782
6.375% 2026 Notes (5)	1	944		884		943		999
6.875% 2026 Notes (5)	1	492		460		491		535
6.25% 2026 Notes (5)	1	3,947		3,980		3,942		4,290
7.50% 2027 Notes (5)	1	545		528		545		595
5.50% 2027 Notes (5)	1	2,627		2,385		—		—
Government Refundable Advances	2	27		27		39		39
Finance Lease Obligations	2	58		58		50		50

⁽¹⁾  Included in other non-current assets on the condensed consolidated balance sheets.

⁽²⁾  Included in prepaid expenses and other on the condensed consolidated balance sheets.

⁽³⁾  Included in accrued liabilities on the condensed consolidated balance sheets.

⁽⁴⁾  Included in other non-current liabilities on the condensed consolidated balance sheets.

⁽⁵⁾  The carrying amount of the debt instrument is presented net of debt issuance costs, premium and discount. Refer to Note 9, "Debt," for gross carrying amounts.

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The Company values its financial instruments using an industry standard market approach, in which prices and other relevant information are generated by market transactions involving identical or comparable assets or liabilities. No financial instruments were recognized using unobservable inputs.

Interest rate swaps were measured at fair value using quoted market prices for the swap interest rate indexes over the term of the swap discounted to present value versus the fixed rate of the contract. The interest rate caps were measured at fair value using implied volatility rates of each individual caplet and the yield curve for the related periods.

The Company’s derivative contracts consist of foreign currency exchange contracts and, from time to time, interest rate swap and cap agreements. These derivative contracts are over-the-counter, and their fair value is determined using modeling techniques that include market inputs such as interest rates, yield curves, and currency exchange rates. These contracts are categorized as Level 2 in the fair value hierarchy.

The estimated fair value of the Company’s term loans was based on information provided by the agent under the Company’s senior secured credit facility. The estimated fair values of the Company’s notes were based upon quoted market prices. There has not been any impact to the fair value of derivative liabilities due to the Company's own credit risk. Similarly, there has not been any impact to the fair value of derivative assets based on the Company's evaluation of counterparties' credit risks.

The fair value of cash and cash equivalents, trade accounts receivable-net and accounts payable approximated book value due to the short-term nature of these instruments at March 28, 2020 and September 30, 2019.

12.    DERIVATIVES AND HEDGING ACTIVITIES

The Company is exposed to, among other things, the impact of changes in foreign currency exchange rates and interest rates in the normal course of business. The Company’s risk management program is designed to manage the exposure and volatility arising from these risks, and utilizes derivative financial instruments to offset a portion of these risks. The Company uses derivative financial instruments only to the extent necessary to hedge identified business risks and does not enter into such transactions for trading purposes. The Company generally does not require collateral or other security with counterparties to these financial instruments and is therefore subject to credit risk in the event of nonperformance; however, the Company monitors credit risk and currently does not anticipate nonperformance by other parties. These derivative financial instruments do not subject the Company to undue risk, as gains and losses on these instruments generally offset gains and losses on the underlying assets, liabilities, or anticipated transactions that are being hedged. The Company has agreements with each of its swap and cap counterparties that contain a provision whereby if the Company defaults on the credit facility the Company could also be declared in default on its swaps and caps, resulting in an acceleration of payment under the swaps and caps.

All derivative financial instruments are recorded at fair value in the condensed consolidated balance sheets. For a derivative that has not been designated as an accounting hedge, the change in the fair value is recognized immediately through earnings. For a derivative that has been designated as an accounting hedge of an existing asset or liability (a fair value hedge), the change in the fair value of both the derivative and underlying asset or liability is recognized immediately through earnings. For a derivative designated as an accounting hedge of an anticipated transaction (a cash flow hedge), the change in the fair value is recorded on the condensed consolidated balance sheet in accumulated other comprehensive income to the extent the derivative is effective in mitigating the exposure related to the anticipated transaction. The change in the fair value related to the ineffective portion of the hedge, if any, is immediately recognized in earnings. The amount recorded within accumulated other comprehensive income is reclassified into earnings in the same period during which the underlying hedged transaction affects earnings.

Interest Rate Swap and Cap Agreements – Interest rate swap and cap agreements are used to manage interest rate risk associated with floating-rate borrowings under our credit facility. The interest rate swap and cap agreements utilized by the Company effectively modify the Company’s exposure to interest rate risk by converting a portion of the Company’s floating-rate debt to a fixed rate basis through the expiration date of the interest rate swap and cap agreements, thereby reducing the impact of interest rate changes on future interest expense. These agreements involve the receipt of floating rate amounts in exchange for fixed rate interest payments over the term of the agreements without an exchange of the underlying principal amount. These derivative instruments qualify as effective cash flow hedges under US GAAP. For these cash flow hedges, the effective portion of the gain or loss from the financial instruments was initially reported as a component of accumulated other comprehensive income (loss) in stockholders’ deficit and subsequently reclassified into earnings in the same line as the hedged item in the same period or periods during which the hedged item affected earnings. As the interest rate swap and cap agreements are used to manage interest rate risk, any gains or losses from the derivative instruments that are reclassified into earnings are recognized in interest expense - net in the condensed consolidated statements of income.

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The following table summarizes the Company's interest rate swap agreements:

Aggregate Notional Amount (in millions)	Start Date	End Date	Related Term Loans	Conversion of Related Variable Rate Debt to Fixed Rate of:
$750	3/31/2016	6/30/2020	Tranche E	5.05% (2.8% plus the 2.25% margin percentage)
$500	6/29/2018	3/31/2025	Tranche E	5.25% (3.0% plus the 2.25% margin percentage)
$750	6/30/2020	6/30/2022	Tranche E	4.75% (2.5% plus the 2.25% margin percentage)
$1,500	6/30/2022	3/31/2025	Tranche E	5.35% (3.1% plus the 2.25% margin percentage)
$1,000	6/28/2019	12/9/2025	Tranche F	4.05% (1.8% plus the 2.25% margin percentage)
$1,400	6/30/2021	12/9/2025	Tranche F	5.25% (3.0% plus the 2.25% margin percentage)
$500	12/30/2016	12/31/2021	Tranche G	4.15% (1.9% plus the 2.25% margin percentage)
$400	9/30/2017	9/30/2022	Tranche G	4.15% (1.9% plus the 2.25% margin percentage)
$900	12/31/2021	6/28/2024	Tranche G	5.35% (3.1% plus the 2.25% margin percentage)
$400	9/30/2022	6/28/2024	Tranche G	5.25% (3.0% plus the 2.25% margin percentage)

The following table summarizes the Company's interest rate cap agreements:

Aggregate Notional Amount (in millions)	Start Date	End Date	Related Term Loans	Offsets Variable Rate Debt Attributable to Fluctuations Above:
$750	9/30/2015	6/30/2020	Tranche E	Three month LIBO rate of 2.5%
$750	6/30/2020	6/30/2022	Tranche E	Three month LIBO rate of 2.5%
$400	6/30/2016	6/30/2021	Tranche F	Three month LIBO rate of 2.0%
$400	12/30/2016	12/31/2021	Tranche G	Three month LIBO rate of 2.5%

Certain derivative asset and liability balances are offset where master netting agreements provide for the legal right of setoff. For classification purposes, we record the net fair value of each type of derivative position that is expected to settle in less than one year with each counterparty as a net current asset or liability and each type of long-term position as a net non-current asset or liability. The amounts shown in the table below represent the gross amounts of recognized assets and liabilities, the amounts offset in the condensed consolidated balance sheet and the net amounts of assets and liabilities presented therein (in millions).

	March 28, 2020					September 30, 2019
	Asset		Liability			Asset		Liability
Interest rate cap agreements	$	—	$	—		$	1	$	—
Interest rate swap agreements (1)	—		(367		)	—		(216		)
Net derivatives as classified in the balance sheet (2)	$	—	$	(367	)	$	1	$	(216	)

⁽¹⁾  The increase in the interest rate swap liability is primarily attributable to a downward trend in the LIBO rate during the second quarter of fiscal 2020.

⁽²⁾  Refer to Note 11, "Fair Value Measurements," for the condensed consolidated balance sheet classification of our interest rate swap and cap agreements.

Based on the fair value amounts of the interest rate swap and cap agreements determined as of March 28, 2020, the estimated net amount of existing gains and losses and caplet amortization expected to be reclassified into interest expense within the next twelve months is approximately $39.4 million.

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Foreign Currency Forward Exchange Contracts – The Company transacts business in various foreign currencies, which subjects the Company’s cash flows and earnings to exposure related to changes in foreign currency exchange rates. These exposures arise primarily from purchases or sales of products and services from third parties. Foreign currency forward exchange contracts provide for the purchase or sale of foreign currencies at specified future dates at specified exchange rates, and are used to offset changes in the fair value of certain assets or liabilities or forecasted cash flows resulting from transactions denominated in foreign currencies. At March 28, 2020, the Company had outstanding foreign currency forward exchange contracts principally to sell U.S. dollars with notional amounts of $145.9 million. These notional values consist primarily of contracts for the Canadian dollar and European euro and are stated in U.S. dollar equivalents at spot exchange rates at the respective dates. During the twenty-six week period ended March 28, 2020, the Company recognized gains on foreign currency forward exchange contracts designated as fair value hedges of $1.8 million in cost of sales in the condensed consolidated statement of income. During the twenty-six week period ended March 28, 2020, the gains the Company reclassified on foreign currency forward exchange contracts designated as cash flow hedges in the condensed consolidated income statement are immaterial. The gains (losses) were previously recorded as a component of accumulated other comprehensive income (loss) in stockholders' deficit.

During the twenty-six week period ended March 28, 2020, the Company recorded a gain of $0.3 million on foreign currency forward exchange contracts that have not been designated as accounting hedges. These foreign currency exchange gains are included in selling and administrative expenses.

There was an immaterial impact to the Company’s earnings related to the ineffective portion of any hedging instruments during the twenty-six week period ended March 28, 2020. In addition, there was an immaterial impact to the Company’s earnings when a hedged firm commitment no longer qualified as a fair value hedge or when a hedged forecasted transaction no longer qualified as a cash flow hedge during the twenty-six week period ended March 28, 2020.

Amounts related to foreign currency forward exchange contracts included in accumulated other comprehensive income (loss) in stockholders' deficit are reclassified into earnings when the hedged transaction settles. The Company expects to reclassify approximately $9.9 million of net losses into earnings over the next 12 months. The maximum duration of the Company’s foreign currency cash flow hedge contracts at March 28, 2020 is 12 months.

13.    SEGMENTS

The Company’s businesses are organized and managed in three reporting segments: Power & Control, Airframe and Non-aviation.

The Power & Control segment includes operations that primarily develop, produce and market systems and components that predominately provide power to or control power of the aircraft utilizing electronic, fluid, power and mechanical motion control technologies. Major product offerings include mechanical/electro-mechanical actuators and controls, ignition systems and engine technology, specialized pumps and valves, power conditioning devices, specialized AC/DC electric motors and generators, databus and power controls, advanced sensor products, switches and relay panels, high performance hoists, winches and lifting devices and cargo loading and handling systems. Primary customers of this segment are engine and power system and subsystem suppliers, airlines, third party maintenance suppliers, military buying agencies and repair depots. Products are sold in the original equipment and aftermarket market channels.

The Airframe segment includes operations that primarily develop, produce and market systems and components that are used in non-power airframe applications utilizing airframe and cabin structure technologies. Major product offerings include engineered latching and locking devices, rods and locking devices, engineered connectors and elastomers, cockpit security components and systems, aircraft audio systems, specialized lavatory components, seat belts and safety restraints, engineered interior surfaces and related components, advanced displays, thermal protection, lighting and control technology, military personnel parachutes and cargo delivery systems. Primary customers of this segment are airframe manufacturers and cabin system suppliers and subsystem suppliers, airlines, third party maintenance suppliers, military buying agencies and repair depots. Products are sold in the original equipment and aftermarket market channels.

The Non-aviation segment includes operations that primarily develop, produce and market products for non-aviation markets. Major product offerings include headsets for high-noise, medium-noise, and dismounted applications, seat belts and safety restraints for ground transportation applications, mechanical/electro-mechanical actuators and controls for space applications, hydraulic/electromechanical actuators and fuel valves for land based gas turbines, and refueling systems for heavy equipment used in mining, construction and other industries and turbine controls for the energy and oil and gas markets. Primary customers of this segment are off-road vehicle suppliers and subsystem suppliers, child restraint system suppliers, satellite and space system suppliers, manufacturers of heavy equipment used in mining, construction and other industries and turbine original equipment manufacturers, gas pipeline builders and electric utilities.

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The primary measurement used by management to review and assess the operating performance of each segment is EBITDA As Defined. The Company defines EBITDA As Defined as earnings before interest, taxes, depreciation and amortization plus certain non-operating items recorded as corporate expenses including refinancing costs, acquisition-related costs, transaction-related costs, foreign currency gains and losses, and non-cash compensation charges incurred in connection with the Company’s stock incentive plans. Acquisition-related costs represent accounting adjustments to inventory associated with acquisitions of businesses and product lines that were charged to cost of sales when the inventory was sold; costs incurred to integrate acquired businesses and product lines into the Company’s operations, facility relocation costs and other acquisition-related costs; transaction related costs comprising deal fees; legal, financial and tax diligence expenses and valuation costs that are required to be expensed as incurred and other acquisition accounting adjustments.

EBITDA As Defined is not a measurement of financial performance under US GAAP. Although the Company uses EBITDA As Defined to assess the performance of its business and for various other purposes, the use of this non-GAAP financial measure as an analytical tool has limitations, and it should not be considered in isolation or as a substitute for analysis of the Company’s results of operations as reported in accordance with US GAAP.

The Company’s segments are reported on the same basis used internally for evaluating performance and for allocating resources. The accounting policies for each segment are the same as those described in the summary of significant accounting policies in the Company’s consolidated financial statements. Intersegment sales and transfers are recorded at values based on market prices, which creates intercompany profit on intersegment sales or transfers that is eliminated in consolidation. Intersegment sales were immaterial for the periods presented below. Certain corporate-level expenses are allocated to the operating segments.

The following table presents net sales by reportable segment (in millions):

	Thirteen Week Periods Ended				Twenty-Six Week Periods Ended
	March 28, 2020		March 30, 2019		March 28, 2020		March 30, 2019
Net sales to external customers
Power & Control
Commercial OEM	$	191	$	146	$	375	$	278
Commercial Aftermarket	225		186		445		344
Defense	331		299		679		570
Total Power & Control	747		631		1,499		1,192
Airframe
Commercial OEM	243		176		473		308
Commercial Aftermarket	220		203		465		382
Defense	192		120		391		208
Total Airframe	655		499		1,329		898
Total Non-aviation	41		38		80		71
	$	1,443	$	1,168	$	2,908	$	2,161

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The following table reconciles EBITDA As Defined by segment to consolidated income from continuing operations before income taxes (in millions):

	Thirteen Week Periods Ended					Twenty-Six Week Periods Ended
	March 28, 2020			March 30, 2019		March 28, 2020		March 30, 2019
EBITDA As Defined
Power & Control	$	381		$	329	$	766	$	628
Airframe	296			243		602		434
Non-aviation	14			12		26		22
Total segment EBITDA As Defined	691			584		1,394		1,084
Less: Unallocated corporate expenses	16			18		38		31
Total Company EBITDA As Defined	675			566		1,356		1,053
Depreciation and amortization expense	72			39		141		74
Interest expense - net	252			202		501		374
Acquisition-related costs	9			38		16		50
Stock compensation expense	12			21		37		38
Refinancing costs	3			3		26		3
Other, net	(10		)	—		6		1
Income from continuing operations before income taxes	$	337		$	263	$	629	$	513

The following table presents total assets by segment (in millions):

	March 28, 2020		September 30, 2019
Total assets
Power & Control	$	7,114	$	7,037
Airframe	6,738		6,672
Non-aviation	259		262
Corporate	2,524		1,322
Assets of discontinued operations	—		962
	$	16,635	$	16,255

The Company’s sales principally originate from the United States, and the Company’s long-lived assets are principally located in the United States.

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14.    RETIREMENT PLANS

The components of net periodic pension cost for the Company's defined benefit plans were as follows (in millions):

	Thirteen Week Periods Ended												Twenty-Six Week Periods Ended
	March 28, 2020						March 30, 2019						March 28, 2020						March 30, 2019
	U.S. Pension Plans			Non-U.S. Pension Plans			U.S. Pension Plans			Non-U.S. Pension Plans			U.S. Pension Plans			Non-U.S. Pension Plans			U.S. Pension Plans			Non-U.S. Pension Plans
Service cost	$	2		$	1		$	1		$	1		$	4		$	2		$	2		$	2
Interest cost	3			1			2			1			5			3			4			2
Expected return on plan assets	(5		)	(1		)	(3		)	(1		)	(9		)	(4		)	(5		)	(3		)
Amortization of prior service cost	—			—			—			—			—			—			—			—
Amortization of actuarial loss	—			—			—			—			1			—			—			—
Amortization of transition obligation	—			—			—			—			—			—			—			—
Net periodic pension cost	$	—		$	1		$	—		$	1		$	1		$	1		$	1		$	1

The net periodic pension cost for the Company's post-retirement pension plans was immaterial for the thirteen and twenty-six week periods ended March 28, 2020 and March 30, 2019. The defined benefit plan components of total pension cost, other than service cost, are included in other expense in the Company's condensed consolidated statements of income.

15.    ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME

The following table presents the components of accumulated other comprehensive (loss) income, net of taxes, for the twenty-six week period ended March 28, 2020 (in millions):

	Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges (1)			Defined benefit pension plan activity (2)			Currency translation adjustment			Total
Balance at September 30, 2019	$	(172	)	$	(40	)	$	(167	)	$	(379	)
Current-period other comprehensive (loss) income	(122		)	6			(8		)	(124		)
Balance at March 28, 2020	$	(294	)	$	(34	)	$	(175	)	$	(503	)

⁽¹⁾  Unrealized loss represents derivative instruments, net of taxes of $43 million and $19 million for the thirteen week periods ended March 28, 2020 and March 30, 2019, respectively, and $34 million and $41 million for the twenty-six week periods ended March 28, 2020 and March 30, 2019, respectively.

⁽²⁾  There were no material pension liability adjustments, net of taxes for the thirteen and twenty-six week periods ended March 28, 2020 and March 30, 2019.

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A summary of reclassifications out of accumulated other comprehensive (loss) income for the twenty-six week periods ended March 28, 2020 and March 30, 2019 is provided below (in millions):

	Amount reclassified
	Twenty-Six Week Periods Ended
Description of reclassifications out of accumulated other comprehensive (loss) income	March 28, 2020		March 30, 2019
Amortization from redesignated interest rate swap and cap agreements (1)	$	2	$	1
Losses from settlement of foreign currency forward exchange contracts (2)	—		1
Deferred tax benefit on reclassifications out of accumulated other comprehensive (loss) income	—		(1		)
Losses reclassified into earnings, net of tax	$	2	$	1

⁽¹⁾  This component of accumulated other comprehensive (loss) income is included in interest expense (see Note 12, “Derivatives and Hedging Activities,” for additional information).

⁽²⁾  This component of accumulated other comprehensive (loss) income is included in net sales (see Note 12, “Derivatives and Hedging Activities,” for additional information).

16.    LEASES

The Company leases certain manufacturing facilities, offices, land, equipment and vehicles. Such leases, some of which are noncancelable and, in many cases, include renewals, expire at various dates. Such options to renew are included in the lease term when it is reasonably certain that the option will be exercised. The Company’s lease agreements typically do not contain any significant residual value guarantees or restrictive covenants, and payments within certain lease agreements are adjusted periodically for changes in an index or rate.

The Company determines if an arrangement is a lease at inception. Operating lease assets and liabilities are recognized at the commencement date of the lease based on the present value of lease payments over the lease term. Lease assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. The discount rate implicit within our leases is generally not determinable and therefore we determine the discount rate based on our incremental borrowing rate. The incremental borrowing rate for our leases is determined based on the lease term and the currency in which lease payments are made. The length of a lease term includes options to extend or terminate the lease when it is reasonably certain that the Company will exercise those options. The Company made an accounting policy election to not recognize lease assets or liabilities for leases with a term of 12 months or less. Additionally, when accounting for leases, the Company combines payments for leased assets, related services and other components of a lease.

The components of lease expense for the thirteen and twenty-six week periods ended March 28, 2020 are as follows (in millions):

	Classification	Thirteen Week Period Ended March 28, 2020		Twenty-Six Week Period Ended March 28, 2020
Operating lease cost	Cost of Sales or Selling and Administrative Expenses	$	7	$	14
Finance lease cost
Amortization of leased assets	Cost of Sales	1		1
Interest on lease liabilities	Interest Expense - Net	1		2
Total lease cost		$	9	$	17

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Supplemental cash flow information related to leases for the twenty-six week period ended March 28, 2020 is as follows (in millions):

	March 28, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows from operating leases	$	14
Operating cash outflows from finance leases	2
Financing cash outflows from finance leases	1
Lease assets obtained in exchange for new lease obligations:
Operating leases	$	15

Supplemental balance sheet information related to leases is as follows (in millions):

	Classification	March 28, 2020
Operating Leases
Operating lease right-of-use assets	Other Assets	$	102
Current operating lease liabilities	Accrued Liabilities	21
Long-term operating lease liabilities	Other Non-current Liabilities	86
Total operating lease liabilities		$	107
Finance Leases
Finance lease right-of-use assets, net	Property, Plant and Equipment—Net	$	71
Current finance lease liabilities	Accrued Liabilities	2
Long-term finance lease liabilities	Other Non-current Liabilities	56
Total finance lease liabilities		$	58

As of March 28, 2020, the Company has the following remaining lease term and weighted average discount rates:

Weighted-average remaining lease term
Operating leases	6.2 years
Finance leases	16.8 years
Weighted-average discount rate
Operating leases	6.2%
Finance leases	7.2%

Maturities of lease liabilities at March 28, 2020 are as follows (in millions):

	Operating Leases		Finance Leases
2020	$	14	$	3
2021	26		6
2022	22		6
2023	17		6
2024	14		6
Thereafter	38		76
Total future minimum lease payments	131		103
Less: imputed interest	24		45
Present value of lease liabilities reported	$	107	$	58

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A summary of minimum rental commitments at March 28, 2020 under noncancelable operating leases, which expire at various dates and in most cases contain renewal options, for each of the next five years and thereafter in the aggregate, is as follows (in millions):

	Operating Leases
2020	$	14
2021	26
2022	23
2023	18
2024	14
Thereafter	39
Total lease commitments	$	134

17.    COMMITMENTS AND CONTINGENCIES

On August 8, 2019, a fire caused significant damage to the Niort, France operating facility of Leach International Europe, which is a subsidiary of TransDigm acquired via the Esterline acquisition. Leach International Europe’s results are reported within the Company’s Power & Control segment. The facility as well as certain machinery, equipment and inventory sustained damage. The Company suspended operations at the Niort facility as a result of the fire; however, has transferred certain operations to temporary facilities until operations are fully restored at the rebuilt facility. The facility is estimated to be complete and fully operational between the first and second quarter of fiscal 2021. 

The Company’s insurance covers damage to the facility, equipment, inventory, and other assets, at replacement cost, as well as business interruption, and recovery-related expenses caused by the fire, subject to a $1 million deductible and certain sub-limits based on the nature of the covered item. Anticipated insurance recoveries related to losses and incremental costs incurred are recognized when receipt is probable. Anticipated insurance recoveries in excess of net book value of the damaged property and inventory will not be recorded until all contingencies relating to the claim have been resolved. The timing of and amounts of ultimate insurance recoveries is not known at this time. Expenses incurred relating to this event for the thirteen and twenty-six week periods ended March 28, 2020 were not material.

18.    DISCONTINUED OPERATIONS

Current Year Divestitures

On December 20, 2019, TransDigm completed the divestiture of the Souriau-Sunbank Connection Technologies business (“Souriau-Sunbank”) with Eaton Corporation plc (“Eaton”) for approximately $920 million. Souriau-Sunbank was acquired by TransDigm as part of its acquisition of Esterline in March 2019 and was included in TransDigm’s Non-aviation segment. The divestiture represented a strategic shift in TransDigm’s business and, in accordance with US GAAP, qualified as discontinued operations.

(Loss) income from discontinued operations, net of tax in the condensed consolidated statements of income for the thirteen and twenty-six week periods ended March 28, 2020 was $(4) million and $68 million, respectively. The $68 million income from discontinued operations, net of tax for the twenty-six week period ended March 28, 2020 was comprised of $8 million income from Souriau-Sunbank's operations and a gain on the sale of Souriau-Sunbank, net of tax, of $60 million. Income from discontinued operations, net of tax was $1 million for the thirteen and twenty-six week periods ended March 30, 2019.

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At September 30, 2019, Souriau-Sunbank’s assets held-for-sale and liabilities held-for-sale were $962 million and $157 million, respectively. Under US GAAP, assets held for sale are to be reported at lower of its carrying amount or fair value less cost to sell. The following is the summarized balance sheet of Souriau-Sunbank’s assets held-for-sale and liabilities held-for-sale as of September 30, 2019 (in millions):

Assets and Liabilities of Discontinued Operations Held-for-Sale	Fiscal Year Ended September 30, 2019
Cash and cash equivalents	$	29
Trade accounts receivable—Net	67
Inventories—Net	88
Prepaid expenses and other	2
Property, plant and equipment—Net	101
Goodwill	480
Other intangibles—Net	194
Other	1
Total assets of discontinued operations	$	962
Accounts payable	$	33
Accrued liabilities	55
Long-term debt	6
Deferred income taxes	42
Other	21
Total liabilities of discontinued operations	$	157

Prior Year Divestitures

On September 20, 2019, TransDigm completed the divestiture of its Esterline Interface Technology (“EIT”) group of businesses to an affiliate of KPS Capital Partners, LP for approximately $190 million. EIT was acquired by TransDigm as part of its acquisition of Esterline in March 2019 and was included in TransDigm’s Non-aviation segment. The divestiture represented a strategic shift in TransDigm’s business and, in accordance with US GAAP, qualified as discontinued operations.

There was no impact to the (loss) income from discontinued operations, net of tax in the condensed consolidated statements of income for the thirteen and twenty-six week periods ended March 28, 2020. Income from discontinued operations, net of tax was $1 million for the thirteen and twenty-six week periods ended March 30, 2019.

Operating Results Summary

The following is the summarized operating results for Souriau-Sunbank for the thirteen and twenty-six week periods ended March 28, 2020 and March 30, 2019 and EIT for the thirteen and twenty-six week periods ended March 30, 2019 (in millions):

	Thirteen Week Period Ended					Twenty-Six Week Period Ended
	March 28, 2020			March 30, 2019		March 28, 2020		March 30, 2019
Net sales	$	—		$	28	$	79	$	28
Income from discontinued operations before income taxes	—			3		13		3
Income tax expense	1			1		5		1
(Loss) Income from discontinued operations, net of tax	(1		)	2		8		2
(Loss) Gain from sale of discontinued operations, net of tax	(3		)	—		60		—
(Loss) Income from discontinued operations, net of tax	$	(4	)	$	2	$	68	$	2

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19.    SUPPLEMENTAL GUARANTOR INFORMATION

TransDigm Inc.’s 2024 Notes, 2025 Notes, 6.375% 2026 Notes, 2026 Secured Notes, 7.50% 2027 Notes and 5.50% 2027 Notes are jointly and severally guaranteed, on a senior subordinated basis, by TD Group, TransDigm UK Holdings plc ("TransDigm UK") and TransDigm Inc.’s Domestic Restricted Subsidiaries, as defined in the applicable Indentures. TransDigm UK's 6.875% 2026 Notes are jointly and severally guaranteed, on a senior subordinated basis, by TD Group, TransDigm Inc. and TransDigm Inc.'s Domestic Restricted Subsidiaries as defined in the applicable indenture. The following supplemental condensed consolidating financial information presents, in separate columns, the balance sheets of the Company as of March 28, 2020 and September 30, 2019 and its statements of income and comprehensive income and cash flows for the twenty-six week periods ended March 28, 2020 and March 30, 2019 for (i) TransDigm Group on a parent only basis with its investment in subsidiaries recorded under the equity method, (ii) TransDigm Inc. including its directly owned operations and non-operating entities, excluding TransDigm UK, (iii) TransDigm UK (iv) the Subsidiary Guarantors (other than TransDigm UK) on a combined basis, (v) Non-Guarantor Subsidiaries and (vi) the Company on a consolidated basis.

Separate financial statements of TransDigm Inc. are not presented because TransDigm Inc.’s 2024 Notes, 2025 Notes, 6.375% 2026 Notes, 2026 Secured Notes, 7.50% 2027 Notes and 5.50% 2027 Notes are fully and unconditionally guaranteed on a senior subordinated basis by TD Group, TransDigm UK and all of TransDigm Inc's Domestic Restricted Subsidiaries and because TD Group has no significant operations or assets separate from its investment in TransDigm Inc.

Separate financial statements of TransDigm UK are not presented because TransDigm UK's 6.875% 2026 Notes, issued in May 2018, are fully and unconditionally guaranteed on a senior subordinated basis by TD Group, TransDigm Inc. and all of TransDigm Inc.'s Domestic Restricted Subsidiaries.

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TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF MARCH 28, 2020

(Amounts in millions)

	TransDigm Group			TransDigm Inc.		TransDigm UK		Subsidiary Guarantors			Non- Guarantor Subsidiaries		Eliminations			Total Consolidated
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	21		$	2,245	$	1	$	(15	)	$	416	$	—		$	2,668
Trade accounts receivable - Net	—			—		—		147			852		—			999
Inventories - Net	—			56		—		936			338		(17		)	1,313
Prepaid expenses and other	—			92		—		63			65		—			220
Total current assets	21			2,393		1		1,131			1,671		(17		)	5,200
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	(4,230		)	17,962		974		19,222			9,680		(43,608		)	—
PROPERTY, PLANT AND  EQUIPMENT - NET	—			18		—		512			218		—			748
GOODWILL	—			83		—		6,413			1,350		—			7,846
OTHER INTANGIBLE ASSETS - NET	—			25		—		2,025			619		—			2,669
DEFERRED INCOME TAXES	—			—		—		—			13		—			13
OTHER	—			9		—		104			46		—			159
TOTAL ASSETS	$	(4,209	)	$	20,490	$	975	$	29,407		$	13,597	$	(43,625	)	$	16,635
LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY
CURRENT LIABILITIES:
Current portion of long-term debt	$	—		$	275	$	—	$	1		$	3	$	—		$	279
Short-term borrowings - trade receivable securitization facility	—			—		—		—			350		—			350
Accounts payable	—			17		—		151			98		—			266
Accrued liabilities	—			249		13		239			260		—			761
Total current liabilities	—			541		13		391			711		—			1,656
LONG-TERM DEBT	—			17,368		492		42			31		—			17,933
DEFERRED INCOME TAXES	—			—		—		289			96		—			385
OTHER NON-CURRENT LIABILITIES	—			434		—		268			164		—			866
Total liabilities	—			18,343		505		990			1,002		—			20,840
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	(4,209		)	2,147		470		28,417			12,591		(43,625		)	(4,209		)
NONCONTROLLING INTERESTS	—			—		—		—			4		—			4
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	$	(4,209	)	$	20,490	$	975	$	29,407		$	13,597	$	(43,625	)	$	16,635

29

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF SEPTEMBER 30, 2019

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK		Subsidiary Guarantors			Non- Guarantor Subsidiaries		Eliminations			Total Consolidated
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	—		$	1,092		$	—	$	(12	)	$	387	$	—		$	1,467
Trade accounts receivable - Net	—			—			—		172			896		—			1,068
Inventories - Net	—			52			—		880			316		(15		)	1,233
Assets held-for-sale	—			—			—		206			756		—			962
Prepaid expenses and other	—			27			—		45			63		—			135
Total current assets	—			1,171			—		1,291			2,418		(15		)	4,865
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	(2,894		)	14,729			975		16,373			6,898		(36,081		)	—
PROPERTY, PLANT AND EQUIPMENT - NET	—			17			—		513			227		—			757
GOODWILL	—			83			—		5,544			2,193		—			7,820
OTHER INTANGIBLE ASSETS - NET	—			25			—		2,064			655		—			2,744
OTHER	—			6			—		35			28		—			69
TOTAL ASSETS	$	(2,894	)	$	16,031		$	975	$	25,820		$	12,419	$	(36,096	)	$	16,255
LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY
CURRENT LIABILITIES:
Current portion of long-term debt	$	—		$	76		$	—	$	1		$	3	$	—		$	80
Short-term borrowings - trade receivable securitization facility	—			—			—		—			350		—			350
Accounts payable	—			17			—		160			99		—			276
Accrued liabilities	—			215			12		237			211		—			675
Liabilities held-for-sale	—			—			—		22			135		—			157
Total current liabilities	—			308			12		420			798		—			1,538
LONG-TERM DEBT	—			15,893			492		49			35		—			16,469
DEFERRED INCOME TAXES	—			—			—		347			94		—			441
OTHER NON-CURRENT LIABILITIES	—			315			—		233			143		—			691
Total liabilities	—			16,516			504		1,049			1,070		—			19,139
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	(2,894		)	(485		)	471		24,771			11,339		(36,096		)	(2,894		)
NONCONTROLLING INTERESTS	—			—			—		—			10		—			10
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	$	(2,894	)	$	16,031		$	975	$	25,820		$	12,419	$	(36,096	)	$	16,255

30

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF INCOME AND COMPREHENSIVE INCOME

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 28, 2020

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK			Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET SALES	$	—		$	84		$	—		$	2,249		$	690		$	(115	)	$	2,908
COST OF SALES	—			46			—			953			404			(115		)	1,288
GROSS PROFIT	—			38			—			1,296			286			—			1,620
SELLING AND ADMINISTRATIVE EXPENSES	—			91			—			193			97			—			381
AMORTIZATION OF INTANGIBLE ASSETS	—			—			—			60			26			—			86
INCOME (LOSS) FROM OPERATIONS	—			(53		)	—			1,043			163			—			1,153
INTEREST EXPENSE (INCOME)—NET	—			504			18			(22		)	1			—			501
REFINANCING COSTS	—			26			—			—			—			—			26
OTHER (INCOME) EXPENSE	—			(5		)	(18		)	4			16			—			(3		)
EQUITY IN INCOME OF SUBSIDIARIES	(623		)	(1,087		)	—			—			—			1,710			—
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	623			509			—			1,061			146			(1,710		)	629
INCOME TAX PROVISION	—			—			—			54			19			—			73
INCOME FROM CONTINUING OPERATIONS	623			509			—			1,007			127			(1,710		)	556
INCOME (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAX	—			114			—			—			(46		)	—			68
NET INCOME	623			623			—			1,007			81			(1,710		)	624
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			—			(1		)	—			(1		)
NET INCOME ATTRIBUTABLE TO TD GROUP	$	623		$	623		$	—		$	1,007		$	80		$	(1,710	)	$	623
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX	(124		)	(122		)	—			4			31			87			(124		)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO TD GROUP	$	499		$	501		$	—		$	1,011		$	111		$	(1,623	)	$	499

31

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF INCOME AND COMPREHENSIVE INCOME

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 30, 2019

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK			Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET SALES	$	—		$	88		$	—		$	1,755		$	378		$	(60	)	$	2,161
COST OF SALES	—			66			—			724			217			(60		)	947
GROSS PROFIT	—			22			—			1,031			161			—			1,214
SELLING AND ADMINISTRATIVE EXPENSES	—			101			—			147			34			—			282
AMORTIZATION OF INTANGIBLE ASSETS	—			2			—			35			5			—			42
(LOSS) INCOME FROM OPERATIONS	—			(81		)	—			849			122			—			890
INTEREST EXPENSE (INCOME)—NET	—			378			9			(3		)	(10		)	—			374
REFINANCING COSTS	—			3			—			—			—			—			3
EQUITY IN INCOME OF SUBSIDIARIES	(398		)	(726		)	—			—			—			1,124			—
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	398			264			(9		)	852			132			(1,124		)	513
INCOME TAX (BENEFIT) PROVISION	—			(134		)	—			234			17			—			117
INCOME (LOSS) FROM CONTINUING OPERATIONS	398			398			(9		)	618			115			(1,124		)	396
INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX	—			—			—			—			2			—			2
NET INCOME	398			398			(9		)	618			117			(1,124		)	398
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			—			—			—			—
NET INCOME (LOSS) ATTRIBUTABLE TO TD GROUP	$	398		$	398		$	(9	)	$	618		$	117		$	(1,124	)	$	398
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX	(161		)	(123		)	—			12			(99		)	210			(161		)
TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TD GROUP	$	237		$	275		$	(9	)	$	630		$	18		$	(914	)	$	237

32

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 28, 2020

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK		Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	—		$	(348	)	$	1	$	668		$	272		$	1		$	594
INVESTING ACTIVITIES:
Capital expenditures	—			(2		)	—		(37		)	(11		)	—			(50		)
Proceeds in connection with sale of discontinued operations, net	—			904			—		—			—			—			904
Net cash provided by (used in) investing activities	—			902			—		(37		)	(11		)	—			854
FINANCING ACTIVITIES:
Intercompany activities	1,899			(1,031		)	—		(634		)	(233		)	(1		)	—
Proceeds from exercise of stock options	69			—			—		—			—			—			69
Dividends and dividend equivalent payments	(1,928		)	—			—		—			—			—			(1,928		)
Treasury stock purchased	(19		)	—			—		—			—			—			(19		)
Proceeds from revolving credit facility	—			200			—		—			—			—			200
Repayments on term loans	—			(19		)	—		—			—			—			(19		)
Redemption of senior subordinated notes due 2022, net	—			(1,168		)	—		—			—			—			(1,168		)
Proceeds from 5.50% senior subordinated notes due 2027, net	—			2,625			—		—			—			—			2,625
Financing fees and other, net	—			(8		)	—		—			—			—			(8		)
Net cash provided by (used in) financing activities	21			599			—		(634		)	(233		)	(1		)	(248		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	—			—			—		—			1			—			1
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	21			1,153			1		(3		)	29			—			1,201
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	—			1,092			—		(12		)	387			—			1,467
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	21		$	2,245		$	1	$	(15	)	$	416		$	—		$	2,668

33

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 30, 2019

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK			Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	—		$	(64	)	$	4		$	469		$	35		$	9		$	453
INVESTING ACTIVITIES:
Capital expenditures	—			(2		)	—			(36		)	(6		)	—			(44		)
Payments made in connection with acquisitions, net of cash acquired	—			(3,538		)	—			(31		)	—			—			(3,569		)
Net cash used in investing activities	—			(3,540		)	—			(67		)	(6		)	—			(3,613		)
FINANCING ACTIVITIES:
Intercompany activities	(23		)	(701		)	(4		)	(407		)	1,144			(9		)	—
Proceeds from exercise of stock options	47			—			—			—			—			—			47
Dividends and dividend equivalent payments	(24		)	—			—			—			—			—			(24		)
Repayment on term loans	—			(38		)	—			—			—			—			(38		)
Cash tender and redemption of senior subordinated notes due 2020	—			(550		)	—			—			—			—			(550		)
Proceeds from senior subordinated notes, net	—			545			—			—			—			—			545
Proceeds from senior secured notes due 2026, net	—			3,937			—			—			—			—			3,937
Financing fees and other, net	—			2			—			(2		)	(2		)	—			(2		)
Net cash provided by (used in) financing activities	—			3,195			(4		)	(409		)	1,142			(9		)	3,915
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	—			—			—			—			1			—			1
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	—			(409		)	—			(7		)	1,172			—			756
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	—			1,821			—			(2		)	254			—			2,073
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	—		$	1,412		$	—		$	(9	)	$	1,426		$	—		$	2,829

20.    SUBSEQUENT EVENTS

Response to COVID-19

In December 2019, COVID-19 surfaced in Wuhan, China, and has since spread to other countries, including the United States. In March 2020, the World Health Organization characterized COVID-19 as a pandemic. The pandemic has resulted in governments around the world implementing increasingly stringent measures to help control the spread of the virus, including quarantines, “shelter in place” and “stay at home” orders, travel restrictions, business curtailments and other measures. In addition, governments and central banks in several parts of the world have enacted fiscal and monetary stimulus measures to counteract the impacts of COVID-19. The airline industry, in particular, has been significantly disrupted, both domestically and internationally.

34

Beginning in the third quarter of fiscal 2020, as part of the Company’s response to the impact of the COVID-19 pandemic on its business, the Company is taking cost reduction measures such as: (1) reducing its workforce by up to 15% to align operations with customer demand. These actions are in addition to the cost mitigation efforts implemented earlier this calendar year in response to the 737 MAX production rate changes; (2) implementing one to eight-week unpaid furloughs at many businesses over approximately the next six months in response to business specific situations; (3) TransDigm’s senior management team will substantially reduce their cash compensation for the balance of fiscal 2020; (4) members of TransDigm's Board of Directors will forgo their annual retainer fees; and, (5) the Company has reassessed capital expenditure projects planned and are prioritizing only those projects that are deemed essential in the near term.

The Company continues to closely analyze its cost structure and may implement additional cost reduction measures as necessary due to the ongoing business challenges resulting from the COVID-19 pandemic.

35

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Forward-looking Statements

The following discussion of the Company’s financial condition and results of operations should be read together with TD Group’s consolidated financial statements and the related notes included elsewhere in this Quarterly Report on Form 10-Q. References in this section to “TransDigm,” “the Company,” “we,” “us,” “our,” and similar references refer to TD Group, TransDigm Inc. and TransDigm Inc.’s subsidiaries, unless the context otherwise indicates.

This Quarterly Report on Form 10-Q contains both historical and “forward-looking statements” within the meaning of Section 21E of the Exchange Act, and 27A of the Securities Act. All statements other than statements of historical fact included that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements, including, in particular, the statements about our plans, objectives, strategies and prospects regarding, among other things, our financial condition, results of operations and business. We have identified some of these forward-looking statements with words like “believe,” “may,” “will,” “should,” “expect,” “intend,” “plan,” “predict,” “anticipate,” “estimate” or “continue” and other words and terms of similar meaning. These forward-looking statements may be contained throughout this Quarterly Report on Form 10-Q. These forward-looking statements are based on current expectations about future events affecting us and are subject to uncertainties and factors relating to, among other things, our operations and business environment, all of which are difficult to predict and many of which are beyond our control. Many factors mentioned in our discussion in this Quarterly Report on Form 10-Q, including the risks outlined under “Risk Factors,” will be important in determining future results. Although we believe that the expectations reflected in these forward-looking statements are reasonable, we do not know whether our expectations will prove correct. They can be affected by inaccurate assumptions we might make or by known or unknown risks and uncertainties, including those described under “Risk Factors” in the Quarterly Report on Form 10-Q. Since our actual results, performance or achievements could differ materially from those expressed in, or implied by, these forward-looking statements, we cannot give any assurance that any of the events anticipated by these forward-looking statements will occur or, if any of them does occur, what impact they will have on our business, results of operations and financial condition. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date they are made. We do not undertake any obligation to update these forward-looking statements or the risk factors contained in this Quarterly Report on Form 10-Q to reflect new information, future events or otherwise, except as may be required under federal securities laws.

Important factors that could cause actual results to differ materially from the forward-looking statements made in this Quarterly Report on Form 10-Q include but are not limited to: the impact that the COVID-19 pandemic has on our business, results of operations, financial condition and liquidity; the sensitivity of our business to the number of flight hours that our customers’ planes spend aloft and our customers’ profitability, both of which are affected by general economic conditions; future geopolitical or other worldwide events; cyber-security threats and natural disasters; our reliance on certain customers; the U.S. defense budget and risks associated with being a government supplier including government audits and investigations; failure to maintain government or industry approvals; failure to complete or successfully integrate acquisitions, including our acquisition of Esterline; our indebtedness; potential environmental liabilities; liabilities arising in connection with litigation; increases in raw material costs, taxes and labor costs that cannot be recovered in product pricing; risks and costs associated with our international sales and operations; and other factors. Please refer to the other information included in this Quarterly Report on Form 10-Q and to Item 1A of the Annual Report on Form 10-K for additional information regarding the foregoing factors that may affect our business.

Overview

We believe we are a leading global designer, producer and supplier of highly engineered aircraft components for use on nearly every commercial and military aircraft in service today. Our business is well diversified due to the broad range of products we offer to our customers. Some of our more significant product offerings, substantially all of which are ultimately provided to end-users in the aerospace industry, include mechanical/electro-mechanical actuators and controls, ignition systems and engine technology, specialized pumps and valves, power conditioning devices, specialized AC/DC electric motors and generators, NiCad batteries and chargers, engineered latching and locking devices, rods and locking devices, engineered connectors and elastomers, databus and power controls, cockpit security components and systems, specialized cockpit displays, aircraft audio systems, specialized lavatory components, seat belts and safety restraints, engineered interior surfaces and related components, advanced sensor products, switches and relay panels, advanced displays, thermal protection and insulation, lighting and control technology, military personnel parachutes, high performance hoists, winches and lifting devices, and cargo loading, handling and delivery systems. Each of these product offerings is composed of many individual products that are typically customized to meet the needs of a particular aircraft platform or customer.

For the second quarter of fiscal year 2020, we generated net sales of $1,443 million and net income attributable to TD Group of $319 million. This included net income from continuing operations attributable to TD Group of $323 million and loss from discontinued operations, net of tax, of $4 million. EBITDA As Defined was $675 million, or 46.8% of net sales. See the "Non-GAAP Financial Measures" section for certain information regarding EBITDA and EBITDA As Defined, including reconciliations of EBITDA and EBITDA As Defined to net income and net cash provided by operating activities.

36

In December 2019, a novel strain of coronavirus (“COVID-19”) surfaced in Wuhan, China, and has since spread to other countries, including the United States. In March 2020, the World Health Organization characterized COVID-19 as a pandemic. The pandemic has resulted in governments around the world implementing increasingly stringent measures to help control the spread of the virus, including quarantines, “shelter in place” and “stay at home” orders, travel restrictions, business curtailments and other measures. In addition, governments and central banks in several parts of the world have enacted fiscal and monetary stimulus measures to counteract the impacts of COVID-19. The airline industry, in particular, has been significantly disrupted, both domestically and internationally.

Our results for the second quarter of fiscal 2020 were modestly adversely impacted by decreases in sales in our commercial aftermarket and commercial OEM channels during approximately the last three weeks of the second quarter of fiscal 2020 due to the impact of the COVID-19 pandemic on our non-defense customers and their demand for our products and services. Because the duration and severity of the pandemic is uncertain at this time, it is difficult to forecast any precise impact on the Company’s future results. However, the Company currently expects the COVID-19 pandemic to have a significant adverse impact on our sales, net income and EBITDA as Defined for the remainder of fiscal 2020 under the assumption that the COVID-19 pandemic will adversely affect our non-defense customers and their demand for our products and services, particularly in the commercial aftermarket. Longer term, the impact of the COVID-19 pandemic is fluid and continues to evolve, and because both the duration and severity of the outbreak are unclear, it is difficult to forecast any precise impact on the Company’s future results.

Beginning in the third quarter of fiscal 2020, as part of the Company’s response to the impact of the COVID-19 pandemic on its business, the Company is taking cost reduction measures such as: (1) reducing its workforce by up to 15% to align operations with customer demand. These actions are in addition to the cost mitigation efforts implemented earlier this calendar year in response to the 737 MAX production rate changes; (2) implementing one to eight-week unpaid furloughs at many businesses over approximately the next six months in response to business specific situations; (3) TransDigm’s senior management team will substantially reduce their cash compensation for the balance of fiscal 2020; (4) members of TransDigm's Board of Directors will forgo their annual retainer fees; and, (5) the Company has reassessed capital expenditure projects planned and are prioritizing only those projects that are deemed essential in the near term.

The Company continues to analyze its cost structure and may implement additional cost reduction measures as may be necessary due to the ongoing business challenges resulting from the COVID-19 pandemic. The impact of the COVID-19 pandemic is fluid and continues to evolve, and therefore, we cannot currently predict the extent to which our business, results of operations, financial condition or liquidity will ultimately be impacted.

Within the United States, our business has been designated an essential business, which allows us to continue to serve our customers, however, the COVID-19 pandemic has also disrupted our operations. The outbreak of COVID-19 has heightened the risk that a significant portion of our workforce will suffer illness or otherwise be unable to work. Furthermore, in light of our determination that planned reductions in our workforce will be necessary as a result of declines in our business caused by the COVID-19 pandemic, we cannot assure that we will be able to rehire our workforce once our business has recovered. Certain of our facilities have experienced temporary disruptions as a result of the COVID-19 pandemic, and we cannot predict whether our facilities will experience more significant disruptions in the future. Finally, our acquisition strategy, which is a key element of our overall business strategy, may be impacted by our efforts to maintain the Company’s liquidity position in response to the COVID-19 pandemic.

Critical Accounting Policies and Estimates

The preparation and fair presentation of the consolidated unaudited interim financial statements and accompanying notes included in this report are the responsibility of management. The financial statements and footnotes have been prepared in accordance with U.S. generally accepted accounting principles for interim financial statements and contain certain amounts that were based upon management’s best estimates, judgments and assumptions that were believed to be reasonable under the circumstances. On an ongoing basis, we evaluate the accounting policies and estimates used to prepare financial statements. Estimates are based on historical experience, judgments and assumptions believed to be reasonable under current facts and circumstances. Actual amounts and results could differ from these estimates used by management.

A comprehensive discussion of the Company’s critical accounting policies and management estimates and significant accounting policies followed in the preparation of the financial statements is included in Item 7 of our Annual Report on Form 10-K for the fiscal year ended September 30, 2019. Other than the adoption of ASC 842, "Leases," there have been no significant changes in critical accounting policies, management estimates or accounting policies since the fiscal year ended September 30, 2019. Refer to Note 4, "Recent Accounting Pronouncements," and Note 16, "Leases," for further information of accounting standards recently adopted or required to be adopted in the future.

Acquisitions and Divestitures

Recent acquisitions and divestitures are described in Note 3, “Acquisitions and Divestitures,” to the condensed consolidated financial statements.

37

Results of Operations

The following table sets forth, for the periods indicated, certain operating data of the Company, including presentation of the amounts as a percentage of net sales (amounts in millions):

	Thirteen Week Periods Ended
	March 28, 2020			% of Sales		March 30, 2019		% of Sales
Net sales	$	1,443		100.0	%	$	1,168	100.0	%
Cost of sales	625			43.3	%	518		44.3	%
Selling and administrative expenses	180			12.5	%	160		13.7	%
Amortization of intangible assets	46			3.2	%	22		1.9	%
Income from operations	592			41.0	%	468		40.1	%
Interest expense, net	252			17.5	%	202		17.3	%
Refinancing costs	3			0.2	%	3		0.3	%
Income tax provision	14			1.0	%	63		5.4	%
Income from continuing operations	323			22.4	%	200		17.1	%
Less: Net income attributable to noncontrolling interests	—			—	%	—		—	%
Income from continuing operations attributable to TD Group	323			22.4	%	200		17.1	%
(Loss) Income from discontinued operations, net of tax	(4		)	(0.3	)%	2		0.2	%
Net income attributable to TD Group	$	319		22.1	%	$	202	17.3	%

	Twenty-Six Week Periods Ended
	March 28, 2020			% of Sales		March 30, 2019		% of Sales
Net sales	$	2,908		100.0	%	$	2,161	100.0	%
Cost of sales	1,288			44.3	%	947		43.8	%
Selling and administrative expenses	381			13.1	%	282		13.0	%
Amortization of intangible assets	86			3.0	%	42		1.9	%
Income from operations	1,153			39.6	%	890		41.2	%
Interest expense, net	501			17.2	%	374		17.3	%
Refinancing costs	26			0.9	%	3		0.1	%
Other income	(3		)	(0.1	)%	—		—	%
Income tax provision	73			2.5	%	117		5.4	%
Income from continuing operations	556			19.1	%	396		18.3	%
Less: Net income attributable to noncontrolling interests	(1		)	—	%	—		—	%
Income from continuing operations attributable to TD Group	555			19.1	%	396		18.3	%
Income from discontinued operations, net of tax	68			2.3	%	2		0.1	%
Net income attributable to TD Group	$	623		21.4	%	$	398	18.4	%

38

Changes in Results of Operations

Thirteen week period ended March 28, 2020 compared with the thirteen week period ended March 30, 2019

Total Company

• Net Sales. Net organic sales and acquisition sales and the related dollar and percentage changes for the thirteen week periods ended March 28, 2020 and March 30, 2019 were as follows (amounts in millions):

	Thirteen Week Periods Ended						% Change Total  Sales
	March 28, 2020		March 30, 2019		Change
Organic sales	$	1,128	$	1,072	$	56	4.8	%
Acquisition sales	315		96		219		18.8	%
	$	1,443	$	1,168	$	275	23.5	%

The increase in organic sales for the thirteen week period ended March 28, 2020 compared to the thirteen week period ended March 30, 2019, is primarily related to an increase in defense sales ($31 million, an increase of 7.3%), commercial OEM sales ($18 million, an increase of 5.9%) and commercial aftermarket sales ($2 million, an increase of 0.6%).

Acquisition sales represent sales of acquired businesses for the period up to one year subsequent to their respective acquisition date. The acquisition sales in the table above for the thirteen week periods ended March 28, 2020 and March 30, 2019 were attributable to the sales recorded by the Esterline businesses acquired by TransDigm in March 2019 for the thirteen week periods ended March 28, 2020 and March 30, 2019. For the quarter ended March 28, 2020, the businesses acquired through the Esterline acquisition generated total sales of $372 million. As TransDigm completed the acquisition of Esterline on March 14, 2019, the amount attributed to Acquisition sales in the table above has been adjusted to reflect eleven weeks of sales from the Esterline businesses during the thirteen week period ended March 28, 2020. These eleven weeks of sales represent the incremental sales not captured in the comparable quarter of the prior year period arising from TransDigm’s acquisition of Esterline.

• Cost of Sales and Gross Profit. Cost of sales increased by $107 million, or 20.7%, to $625 million for the thirteen week period ended March 28, 2020 compared to $518 million for the thirteen week period ended March 30, 2019. Cost of sales and the related percentage of total sales for the thirteen week periods ended March 28, 2020 and March 30, 2019 were as follows (amounts in millions):

	Thirteen Week Periods Ended
	March 28, 2020			March 30, 2019			Change			% Change
Cost of sales - excluding costs below	$	646		$	502		$	144		28.7	%
% of total sales	44.8		%	43.0		%
Acquisition integration costs	2			1			1			100.0	%
% of total sales	0.1		%	0.1		%
Stock compensation expense	1			2			(1		)	(50.0	)%
% of total sales	0.1		%	0.2		%
Inventory acquisition accounting adjustments	—			16			(16		)	(100.0	)%
% of total sales	—		%	1.4		%
Loss contract amortization	(11		)	(2		)	(9		)	(450.0	)%
% of total sales	(0.8		)%	(0.2		)%
Foreign currency gain	(13		)	(1		)	(12		)	(1,200.0	)%
% of total sales	(0.9		)%	(0.1		)%
Total cost of sales	$	625		$	518		$	107		20.7	%
% of total sales	43.3		%	44.3		%
Gross profit	$	818		$	650		$	168		25.8	%
Gross profit percentage	56.7		%	55.7		%

The increase in the dollar amount of cost of sales during the thirteen week period ended March 28, 2020 was primarily due to increased sales volume as a result of the Esterline businesses acquired in March 2019. This was slightly offset by a decrease in inventory acquisition accounting costs as they were fully amortized by fiscal 2020, foreign currency gains and amortization of loss contract reserves primarily related to the Esterline businesses.

39

Gross profit as a percentage of sales increased by 1.0 percentage point to 56.7% for the thirteen week period ended March 28, 2020 from 55.7% for the thirteen week period ended March 30, 2019. This increase was driven by the application of our three core value-driven operating strategies (obtaining profitable new business, continually improving our cost structure, and providing highly engineered value-added products to customers). Although gross profit as a percentage of sales continues to improve for the Esterline businesses as the integration activities continue, the gross profits earned by the Esterline businesses have a dilutive effect on TransDigm's gross profit percentage for the thirteen week period ended March 28, 2020.

• Selling and Administrative Expenses. Selling and administrative expenses increased by $20 million to $180 million, or 12.5% of sales, for the thirteen week period ended March 28, 2020 from $160 million, or 13.7% of sales, for the thirteen week period ended March 30, 2019. Selling and administrative expenses and the related percentage of total sales for the thirteen week periods ended March 28, 2020 and March 30, 2019 were as follows (amounts in millions):

	Thirteen Week Periods Ended
	March 28, 2020			March 30, 2019			Change			% Change
Selling and administrative expenses - excluding costs below	$	163		$	121		$	42		34.7	%
% of total sales	11.3		%	10.4		%
Stock compensation expense	10			18			(8		)	(44.4	)%
% of total sales	0.7		%	1.5		%
Acquisition-related expenses	7			21			(14		)	(66.7	)%
% of total sales	0.5		%	1.8		%
Total selling and administrative expenses	$	180		$	160		$	20		12.5	%
% of total sales	12.5		%	13.7		%

The increase in the dollar amount of selling and administrative expenses during the thirteen week period ended March 28, 2020 is primarily due to increased sales volume as a result of the Esterline businesses acquired in March 2019, partially offset by decreases in acquisition-related expenses of $14 million and stock compensation expense of $8 million. The decrease in stock compensation expense is attributable to a cumulative adjustment to expense under US GAAP for a change in the expected vesting percentage of the fiscal 2020 stock option grants.

• Amortization of Intangible Assets. Amortization of intangible assets was $46 million for the thirteen week period ended March 28, 2020 compared to $22 million in the thirteen week period ended March 30, 2019. The increase in amortization expense of $24 million was due to the amortization expense on the definite-lived intangible assets recorded in connection with the fiscal 2019 acquisition of Esterline.

• Refinancing Costs. Refinancing costs of $3 million were recorded for the thirteen week period ended March 28, 2020 and primarily related to certain fees incurred to refinance its term loans in February 2020.

• Interest Expense-net. Interest expense-net includes interest on borrowings outstanding, amortization of debt issuance costs, original issue discount and premium and revolving credit facility fees; slightly offset by interest income. Interest expense-net increased $50 million, or 24.8%, to $252 million for the thirteen week period ended March 28, 2020 from $202 million for the comparable thirteen week period last year. The net increase in interest expense-net was primarily due to an increase in the weighted average level of outstanding borrowings, which was approximately $18.5 billion for the thirteen week period ended March 28, 2020 and approximately $15.3 billion for the thirteen week period ended March 30, 2019. The increase in weighted average level of borrowings was primarily due to the activity in the first and second quarter of fiscal 2020 consisting of the issuance of $2.65 billion in 5.50% 2027 Notes and the $200 million draw on the revolving credit facility. The increases in new debt described above were slightly offset by the redemption of $1.15 billion in 6.00% 2022 Notes in the first quarter of fiscal 2020. The weighted average interest rate for cash interest payments on total borrowings outstanding for the thirteen week period ended March 28, 2020 was 5.31%.

40

• Income Taxes. Income tax expense as a percentage of income before income taxes was approximately 4.2% for the thirteen week period ended March 28, 2020 compared to 24.2% for the thirteen week period ended March 30, 2019. On March 27, 2020, President Trump signed into law the CARES Act in response to the COVID-19 pandemic. The CARES Act, among other things, includes provisions relating to refundable payroll tax credits, deferment of employer social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, and modifications to the net interest deduction limitations. The most significant impact of the CARES Act for the Company is an increase of the IRC 163(j) Interest Disallowance Limitations from 30% to 50% of adjusted taxable income which will allow the Company to deduct additional interest for fiscal years 2020 (retroactive to October 1, 2019 for the Company) and 2021. The Company's lower effective tax rate for the thirteen week period ended March 28, 2020 was primarily due to a discrete benefit recognized for excess tax benefits for share-based payments, in addition to the modification of the interest expense limitation under IRC Section 163(j) enacted as part of the CARES Act. The Company’s effective tax rate for the thirteen week period ended March 28, 2020 was lower than the Federal statutory rate of 21% primarily due to a discrete benefit recognized for excess tax benefits for share-based payments, partially offset by foreign earnings taxed at rates higher than the U.S. statutory rate.

• (Loss) Income from Discontinued Operations. Discontinued operations for the thirteen week period ended March 28, 2020 includes an immaterial adjustment of $4 million on the gain recognized from the sale of Souriau-Sunbank. Discontinued operations for the thirteen week period ended March 30, 2019 include the results of the operations of the Souriau-Sunbank Connection Technologies business and the Esterline Interface Technology ("EIT") group of businesses. Both businesses were acquired by TransDigm as part of its acquisition of Esterline in March 2019. On December 20, 2019, TransDigm completed the divestiture of Souriau-Sunbank to Eaton Corporation plc (“Eaton”) for approximately $920 million. On September 20, 2019, TransDigm completed the divestiture of EIT to an affiliate of KPS Capital Partners, LP for approximately $190 million.

Income from discontinued operations for the thirteen week period ended March 30, 2019 is $1 million and includes the results of operations of the Souriau-Sunbank and EIT businesses.

• Net Income Attributable to TD Group. Net income attributable to TD Group increased $117 million, or 57.9%, to $319 million for the thirteen week period ended March 28, 2020 compared to net income attributable to TD Group of $202 million for the thirteen week period ended March 30, 2019, primarily as a result of the factors referred to above.

• Earnings per Share. Basic and diluted earnings per share was $5.56 for the thirteen week period ended March 28, 2020 and $3.60 per share for the thirteen week period ended March 30, 2019. Basic and diluted earnings (loss) per share from continuing operations and discontinued operations was $5.63 and $(0.07), respectively, for the thirteen week period ended March 28, 2020. Basic and diluted earnings per share from continuing operations and discontinued operations was $3.56 and $0.04, respectively, for the thirteen week period ended March 30, 2019.

Business Segments

• Segment Net Sales. Net sales by segment for the thirteen week periods ended March 28, 2020 and March 30, 2019 were as follows (amounts in millions):

	Thirteen Week Periods Ended
	March 28, 2020		% of Sales		March 30, 2019		% of Sales		Change		% Change
Power & Control	$	747	51.8	%	$	631	54.0	%	$	116	18.4	%
Airframe	655		45.4	%	499		42.7	%	156		31.3	%
Non-aviation	41		2.8	%	38		3.3	%	3		7.9	%
	$	1,443	100.0	%	$	1,168	100.0	%	$	275	23.5	%

Acquisition sales for the Power & Control segment increased $70 million, or an increase of 11.1%, resulting from the acquisition of Esterline. Organic sales for the Power & Control segment increased $46 million, an increase of 7.3%, for the thirteen week period ended March 28, 2020 compared to the thirteen week period ended March 30, 2019. The organic sales increase resulted primarily from an increase in commercial aftermarket sales ($16 million, an increase of 9.0%), an increase in commercial OEM sales ($13 million, an increase of 9.5%) and an increase in defense sales ($12 million, an increase of 4.0%).

Acquisition sales for the Airframe segment increased $146 million, or an increase of 29.3%, resulting from the acquisition of Esterline. Organic sales for the Airframe segment increased $10 million, an increase of 2.0%, for the thirteen week period ended March 28, 2020 compared to the thirteen week period ended March 30, 2019. The organic sales increase resulted primarily from an increase in defense sales ($17 million, an increase of 13.8%) and commercial OEM sales ($5 million, an increase of 3.1%); partially offset by a decrease in commercial aftermarket sales ($14 million, a decrease of 6.9%).

Acquisition sales for the Non-aviation segment increased $3 million, or an increase of 7.9%, resulting from the acquisition of Esterline.

41

• EBITDA As Defined. EBITDA As Defined by segment for the thirteen week periods ended March 28, 2020 and March 30, 2019 were as follows (amounts in millions):

	Thirteen Week Periods Ended
	March 28, 2020		% of  Segment Sales		March 30, 2019		% of  Segment Sales		Change		% Change
Power & Control	$	381	55.2	%	$	329	56.3	%	$	52	15.8	%
Airframe	296		42.8	%	243		41.6	%	53		21.8	%
Non-aviation	14		2.0	%	12		2.1	%	2		16.7	%
	$	691	100.0	%	$	584	100.0	%	$	107	18.3	%

EBITDA As Defined for the Power & Control segment from the acquisition of Esterline increased approximately $20 million for the thirteen week period ended March 28, 2020. Organic EBITDA As Defined for the Power & Control segment increased approximately $32 million, an increase of 9.8%, resulting from organic sales growth in defense, commercial OEM and commercial aftermarket, as well as the application of our three core value-driven operating strategies, and positive leverage on our fixed overhead costs spread over a higher production volume.

EBITDA As Defined for the Airframe segment from the acquisition of Esterline increased approximately $58 million for the thirteen week period ended March 28, 2020. Organic EBITDA as Defined for the Airframe segment decreased approximately $5 million, a decrease of 1.9%, resulting from an organic sales decrease in the commercial aftermarket, partially offset by organic sales increases in defense and commercial OEM and the application of our three core value-driven operating strategies.

EBITDA As Defined for the Non-aviation segment from the acquisition of Esterline increased approximately $1 million for the thirteen week period ended March 28, 2020. Organic EBITDA As Defined for the Non-aviation segment increased approximately $1 million, an increase of 9.2%.

Twenty-six week period ended March 28, 2020 compared with the twenty-six week period ended March 30, 2019

Total Company

• Net Sales. Net organic sales and acquisition sales and the related dollar and percentage changes for the twenty-six week periods ended March 28, 2020 and March 30, 2019 were as follows (amounts in millions):

	Twenty-Six Week Periods Ended						% Change Total  Sales
	March 28, 2020		March 30, 2019		Change
Organic sales	$	2,209	$	2,065	$	144	6.7	%
Acquisition sales	699		96		603		27.9	%
	$	2,908	$	2,161	$	747	34.6	%

The increase in organic sales for the twenty-six week period ended March 28, 2020 compared to the twenty-six week period ended March 30, 2019, is primarily related to an increase in defense sales ($74 million, an increase of 9.5%), commercial aftermarket sales ($45 million, an increase of 6.3%) and commercial OEM sales ($17 million, an increase of 3.0%).

Acquisition sales represent sales of acquired businesses for the period up to one year subsequent to their respective acquisition date. The acquisition sales in the table above for the twenty-six week periods ended March 28, 2020 and March 30, 2019 were attributable to the sales recorded by the Esterline businesses acquired by TransDigm in March 2019 for the twenty-six week periods ended March 28, 2020 and March 30, 2019. For the twenty-six week period ended March 28, 2020, the businesses acquired through the Esterline acquisition generated total sales of $756 million. As TransDigm completed the acquisition of Esterline on March 14, 2019, the amount attributed to Acquisition sales in the table above has been adjusted to reflect twenty-four weeks of sales from the Esterline businesses during the twenty-six week period ended March 28, 2020. These twenty-four weeks of sales represent the incremental sales not captured in the comparable twenty-six week period of the prior year period arising from TransDigm’s acquisition of Esterline.

42

• Cost of Sales and Gross Profit. Cost of sales increased by $341 million, or 36.0%, to $1,288 million for the twenty-six week period ended March 28, 2020 compared to $947 million for the twenty-six week period ended March 30, 2019. Cost of sales and the related percentage of total sales for the twenty-six week periods ended March 28, 2020 and March 30, 2019 were as follows (amounts in millions):

	Twenty-Six Week Periods Ended
	March 28, 2020			March 30, 2019			Change			% Change
Cost of sales - excluding costs below	$	1,305		$	928		$	377		40.6	%
% of total sales	44.9		%	42.9		%
Stock compensation expense	4			4			—			—	%
% of total sales	0.1		%	0.2		%
Acquisition integration costs	3			3			—			—	%
% of total sales	0.1		%	0.1		%
Foreign currency loss (gain)	1			(3		)	4			133.3	%
% of total sales	—		%	(0.1		)%
Inventory acquisition accounting adjustments	—			20			(20		)	(100.0	)%
% of total sales	—		%	0.9		%
Loss contract amortization	(25		)	(5		)	(20		)	(400.0	)%
% of total sales	(0.9		)%	(0.2		)%
Total cost of sales	$	1,288		$	947		$	341		36.0	%
% of total sales	44.3		%	43.8		%
Gross profit	$	1,620		$	1,214		$	406		33.4	%
Gross profit percentage	55.7		%	56.2		%

The increase in the dollar amount of cost of sales during the twenty-six week period ended March 28, 2020 was primarily due to increased sales volume as a result of the Esterline businesses acquired in March 2019 compared to the twenty-six week period ended March 30, 2019. This was slightly offset by a decrease in inventory acquisition accounting adjustments as they were fully amortized prior to fiscal 2020 and amortization of loss contract reserves primarily related to the Esterline acquisition.

Gross profit as a percentage of sales decreased by 0.5 points to 55.7% for the twenty-six week period ended March 28, 2020 from 56.2% for the twenty-six week period ended March 30, 2019. The decrease in the gross profit percentage is primarily driven by the dilutive effect of the Esterline businesses on the gross profit percentage for the twenty-six week period ended March 28, 2020. However, the gross profit percentage continues to improve for the Esterline businesses as integration activities continue including the application of our three core value-driven operating strategies (obtaining profitable new business, continually improving our cost structure, and providing highly engineered value-added products to customers).

• Selling and Administrative Expenses. Selling and administrative expenses increased by $99 million to $381 million, or 13.1% of sales, for the twenty-six week period ended March 28, 2020 from $282 million, or 13.1% of sales, for the twenty-six week period ended March 30, 2019. Selling and administrative expenses and the related percentage of total sales for the twenty-six week periods ended March 28, 2020 and March 30, 2019 were as follows (amounts in millions):

	Twenty-Six Week Periods Ended
	March 28, 2020			March 30, 2019			Change			% Change
Selling and administrative expenses - excluding costs below	$	335		$	221		$	114		51.6	%
% of total sales	11.5		%	10.2		%
Stock compensation expense	33			34			(1		)	(2.9	)%
% of total sales	1.1		%	1.6		%
Acquisition-related expenses	13			27			(14		)	(51.9	)%
% of total sales	0.4		%	1.2		%
Total selling and administrative expenses	$	381		$	282		$	99		35.1	%
% of total sales	13.1		%	13.1		%

43

The increase in the dollar amount of selling and administrative expenses during the twenty-six week period ended March 28, 2020 is primarily due to increased sales volume as a result of the Esterline businesses acquired in March 2019, partially offset by decreases in acquisition-related expenses of $14 million and stock compensation expense of $1 million. The decrease in stock compensation expense is attributable to a cumulative adjustment to expense under US GAAP recorded in the second quarter of fiscal 2020 for a change in the expected vesting percentage of the fiscal 2020 stock option grants.

• Amortization of Intangible Assets. Amortization of intangible assets was $86 million for the twenty-six week period ended March 28, 2020 compared to $42 million in the twenty-six week period ended March 30, 2019. The increase in amortization expense of $44 million was due to the amortization expense on the definite-lived intangible assets recorded in connection with the fiscal 2019 acquisition of Esterline.

• Refinancing Costs. Refinancing costs of $26 million were recorded for the twenty-six week period ended March 28, 2020 and primarily related to the fees incurred on the redemption of the 2022 Notes that occurred in the first quarter of fiscal 2020 and certain fees incurred to refinance the term loans in the second quarter of fiscal 2020.

• Other Income. Other income of $3 million was recorded for the twenty-six week period ended March 28, 2020 and primarily related to the non-service related components of net periodic benefit costs on the Company's defined benefit pension plans.

• Interest Expense-net. Interest expense-net includes interest on borrowings outstanding, amortization of debt issuance costs, original issue discount and premium and revolving credit facility fees slightly offset by interest income. Interest expense-net increased $127 million, or 34.0%, to $501 million for the twenty-six week period ended March 28, 2020 from $374 million for the comparable twenty-six week period last year. The net increase in interest expense-net was primarily due to an increase in the weighted average level of outstanding borrowings, which was approximately $18.2 billion for the twenty-six week period ended March 28, 2020 and approximately $14.1 billion for the twenty-six week period ended March 30, 2019. The increase in weighted average level of borrowings was primarily due to the activity in the second quarter of fiscal 2019 consisting of the issuance of $4.0 billion in 6.25% 2026 Secured Notes and the issuance of $550 million in 7.50% 2027 Notes and the activity in the first and second quarters of fiscal 2020 consisting of the issuance of $2.65 billion in 5.50% 2027 Notes and the $200 million draw on the revolving credit facility. The increases in new debt described above were slightly offset by the redemptions of $550 million in 5.50% 2020 Notes and $1.15 billion in 6.00% 2022 Notes. The weighted average interest rate for cash interest payments on total borrowings outstanding for the twenty-six week period ended March 28, 2020 was 5.20%.

• Income Taxes. Income tax expense as a percentage of income before income taxes was approximately 11.6% for the twenty-six week period ended March 28, 2020 compared to 22.9% for the twenty-six week period ended March 30, 2019. On March 27, 2020, President Trump signed into law the CARES Act in response to the COVID-19 pandemic. The CARES Act, among other things, includes provisions relating to refundable payroll tax credits, deferment of employer social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, and modifications to the net interest deduction limitations. The most significant impact of the CARES Act for the Company is an increase of the IRC 163(j) Interest Disallowance Limitations from 30% to 50% of adjusted taxable income which will allow the Company to deduct additional interest for fiscal years 2020 and 2021. The Company's lower effective tax rate for the twenty-six week period ended March 28, 2020 was primarily due to a discrete benefit recognized for excess tax benefits for share-based payments, in addition to the modification of the interest expense limitation under IRC Section 163(j) enacted as part of the CARES Act. The Company’s effective tax rate for the period ended March 28, 2020 was lower than the Federal statutory rate of 21% primarily due to a discrete benefit recognized for excess tax benefits for share-based payments, partially offset by foreign earnings taxed at rates higher than the U.S. statutory rate.

• Income from Discontinued Operations. Discontinued operations for the twenty-six week period ended March 28, 2020 include the results of the operations of Souriau-Sunbank. Discontinued operations for the twenty-six week period ended March 30, 2019 include the results of the operations of Souriau-Sunbank and the Esterline Interface Technology ("EIT") group of businesses. Both businesses were acquired by TransDigm as part of its acquisition of Esterline in March 2019. On December 20, 2019, TransDigm completed the divestiture of Souriau-Sunbank to Eaton for approximately $920 million. On September 20, 2019, TransDigm completed the divestiture of EIT to an affiliate of KPS Capital Partners, LP for approximately $190 million.

Income from discontinued operations for the twenty-six week period ended March 28, 2020 is $68 million and includes $8 million from Souriau-Sunbank's operations and a gain on the sale of Souriau-Sunbank, net of tax, of $60 million. Income from discontinued operations for the twenty-six week period ended March 30, 2019 is $1 million and includes the results of operations of the Souriau-Sunbank and EIT businesses.

• Net Income Attributable to TD Group. Net income attributable to TD Group increased $225 million, or 56.5%, to $623 million for the twenty-six week period ended March 28, 2020 compared to net income attributable to TD Group of $398 million for the twenty-six week period ended March 30, 2019, primarily as a result of the factors referred to above.

44

• Earnings per Share. Basic and diluted earnings per share was $7.63 for the twenty-six week period ended March 28, 2020 and $6.65 per share for the twenty-six week period ended March 30, 2019. Basic and diluted earnings per share from continuing operations and discontinued operations was $6.45 and $1.18, respectively, for the twenty-six week period ended March 28, 2020. Basic and diluted earnings per share from continuing operations and discontinued operations was $6.61 and $0.04, respectively, for the twenty-six week period ended March 30, 2019. Net income attributable to TD Group for the twenty-six week period ended March 28, 2020 of $623 million was decreased by dividend equivalent payments paid of $185 million, or $3.22 per share, resulting in net income available to common shareholders of $438 million, or $7.63 per share. Net income for the twenty-six week period ended March 30, 2019 of $398 million was decreased by dividend equivalent payments of $24 million, or $0.43 per share, resulting in net income available to common shareholders of $374 million, or $6.65 per share.

Business Segments

• Segment Net Sales. Net sales by segment for the twenty-six week periods ended March 28, 2020 and March 30, 2019 were as follows (amounts in millions):

	Twenty-Six Week Periods Ended
	March 28, 2020		% of Sales		March 30, 2019		% of Sales		Change		% Change
Power & Control	$	1,499	51.5	%	$	1,192	55.2	%	$	307	25.8	%
Airframe	1,329		45.7	%	898		41.5	%	431		48.0	%
Non-aviation	80		2.8	%	71		3.3	%	9		12.7	%
	$	2,908	100.0	%	$	2,161	100.0	%	$	747	34.6	%

Acquisition sales for the Power & Control segment increased $196 million, or an increase of 16.4%, resulting from the acquisition of Esterline. Organic sales for the Power & Control segment increased $111 million, an increase of 9.3%, for the twenty-six week period ended March 28, 2020 compared to the twenty-six week period ended March 30, 2019. The organic sales increase resulted primarily from an increase in defense sales ($50 million, an increase of 8.7%), an increase in commercial aftermarket sales ($45 million, an increase of 13.4%) and an increase in commercial OEM sales ($10 million, an increase of 4.0%).

Acquisition sales for the Airframe segment increased $401 million, or an increase of 44.7%, resulting from the acquisition of Esterline. Organic sales for the Airframe segment increased $30 million, an increase of 3.3%, for the twenty-six week period ended March 28, 2020 compared to the twenty-six week period ended March 30, 2019. The organic sales increase resulted primarily from an increase in defense sales ($22 million, an increase of 10.5%) and commercial OEM sales ($6 million, an increase of 2.1%).

Acquisition sales for the Non-aviation segment increased $7 million, or an increase of 9.9%, resulting from the acquisition of Esterline. Organic sales for the Non-aviation segment increased by $2 million, an increase of 2.8%, for the twenty-six week period ended March 28, 2020 compared to the twenty-six week period ended March 30, 2019.

• EBITDA As Defined. EBITDA As Defined by segment for the twenty-six week periods ended March 28, 2020 and March 30, 2019 were as follows (amounts in millions):

	Twenty-Six Week Periods Ended
	March 28, 2020		% of  Segment Sales		March 30, 2019		% of  Segment Sales		Change		% Change
Power & Control	$	766	54.9	%	$	628	58.0	%	$	138	22.0	%
Airframe	602		43.2	%	434		40.0	%	168		38.7	%
Non-aviation	26		1.9	%	22		2.0	%	4		18.2	%
	$	1,394	100.0	%	$	1,084	100.0	%	$	310	28.6	%

EBITDA As Defined for the Power & Control segment from the acquisition of Esterline increased approximately $55 million for the twenty-six week period ended March 28, 2020. Organic EBITDA As Defined for the Power & Control segment increased approximately $83 million, an increase of 13.2%, resulting from organic sales growth in defense, commercial OEM and commercial aftermarket, as well as the application of our three core value-driven operating strategies, and positive leverage on our fixed overhead costs spread over a higher production volume.

EBITDA As Defined for the Airframe segment from the acquisition of Esterline increased approximately $153 million for the twenty-six week period ended March 28, 2020. Organic EBITDA as Defined for the Airframe segment increased approximately $15 million, an increase of 3.5%, primarily resulting from organic sales growth in defense and commercial OEM as well as the application of our three core value-driven operating strategies.

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EBITDA As Defined for the Non-aviation segment from the acquisition of Esterline increased approximately $1 million for the twenty-six week period ended March 28, 2020. Organic EBITDA As Defined for the Non-aviation segment increased approximately $3 million, an increase of 13.6%.

Backlog

As of March 28, 2020, the Company estimated its sales order backlog at $3,540 million compared to $2,188 million as of March 30, 2019. The sales order backlog associated with the acquired Esterline businesses was excluded in the sales order backlog total as of March 30, 2019 as at the time it was being assessed by TransDigm management to ensure the reported backlog was in compliance with TransDigm policy and computed consistently with that of the existing TransDigm legacy businesses.

Excluding the increase in the sales order backlog attributable to the Esterline businesses being included in the total as of March 28, 2020, backlog increased approximately $70 million compared to March 30, 2019. The majority of the purchase orders outstanding as of March 28, 2020 are scheduled for delivery within the next twelve months. Purchase orders may be subject to cancellation or deferral by the customer prior to shipment. The level of unfilled purchase orders at any given date during the year will be materially affected by the timing of the Company’s receipt of purchase orders and the speed with which those orders are filled. Accordingly, the Company’s backlog as of March 28, 2020 may not necessarily represent the actual amount of shipments or sales for any future period.

Foreign Operations

Although we manufacture a significant portion of our products in the United States, we manufacture certain products in Europe, Asia, Canada, Mexico and other countries globally. We sell our products in the United States as well as in foreign countries. Although the majority of sales of our products are made to customers (including distributors) located in the United States, our products are ultimately sold to and used by customers, including airlines and other end users of aircraft, throughout the world. A number of risks inherent in international operations could have a material adverse effect on our results of operations, including the COVID-19 pandemic, currency fluctuations, difficulties in staffing and managing multi-national operations, general economic and political uncertainties and potential for social unrest in countries in which we operate, limitations on our ability to enforce legal rights and remedies, restrictions on the repatriation of funds, change in trade policies, tariff regulation, difficulties in obtaining export and import licenses and the risk of government financed competition.

There can be no assurance that foreign governments will not adopt regulations or take other action that would have a direct or indirect adverse impact on the business or market opportunities of the Company within such governments’ countries. Furthermore, there can be no assurance that the political, cultural and economic climate outside the United States will be favorable to our operations and growth strategy.

Liquidity and Capital Resources

We have historically maintained a capital structure comprising a mix of equity and debt financing. We vary our leverage both to optimize our equity return and to pursue acquisitions. We expect to meet our current debt obligations as they come due through internally generated funds from current levels of operations and/or through refinancing in the debt markets prior to the maturity dates of our debt.

We continually evaluate our debt facilities to assess whether they most efficiently and effectively meet the current and future needs of our business. The Company evaluates from time to time the appropriateness of its current leverage, taking into consideration the Company’s debt holders, equity holders, credit ratings, acquisition opportunities and other factors.

If the Company has excess cash, it generally prioritizes allocating the excess cash in the following manner: (1) capital spending at existing businesses, (2) acquisitions of businesses, (3) payment of a special dividend and/or repurchases of our common stock and (4) prepayment of indebtedness or repurchase of debt. Whether the Company undertakes common stock repurchases or other aforementioned activities will depend on prevailing market conditions, the Company's liquidity requirements, contractual restrictions and other factors. The amounts involved may be material. In addition, the Company may issue additional debt if prevailing market conditions are favorable to doing so.

The Company’s ability to make scheduled interest payments on, or to refinance, the Company’s indebtedness, or to fund non-acquisition related capital expenditures and research and development efforts, will depend on the Company’s ability to generate cash in the future. This is subject to general economic, financial, competitive, legislative, regulatory and other factors that are beyond its control, including the ongoing COVID-19 pandemic.

As TransDigm cannot predict the duration or scope of the COVID-19 pandemic and its impact on our customers and suppliers, the potential negative financial impact to its results cannot be reasonably estimated, but could be material. The Company is actively managing the business to maintain cash flow, including the cost reduction efforts described in Note 20, "Subsequent Events," to the condensed consolidated financial statements in response to the COVID-19 pandemic and are continuing to focus on the application of its three core value-driven operating strategies (obtaining profitable new business, continually improving its cost structure and providing highly engineered value-added products to customers).

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In March 2020, the President of the United States signed the CARES Act, a substantial tax-and-spending package intended to provide additional economic stimulus to address the impact of the COVID-19 pandemic. The CARES Act, among other things, includes provisions relating to refundable payroll tax credits, deferment of employer social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, and modifications to the net interest deduction limitations. The most significant impact of the CARES Act for the Company is an increase of the IRC 163(j) Interest Disallowance Limitations from 30% to 50% of adjusted taxable income which will allow the Company to deduct additional interest for fiscal years 2020 and 2021. The Company continues to assess the impact of the CARES Act and ongoing government guidance related to COVID-19 that may be issued.

In March 2020, the Company drew $200 million on its revolving credit facility to increase the Company's liquidity as a precautionary response to macroeconomic conditions caused by the COVID-19 pandemic. Also, in further actions to increase the Company's liquidity, the Company executed two notes offerings in April 2020 in which the proceeds received are for general Corporate purposes. On April 8, 2020, the Company entered into a purchase agreement in connection with a private offering of $1,100 million in aggregate principal amount of 8.00% Senior Secured Notes due 2025 at an issue price of 100% of the principal amount. On April 17, 2020, the Company entered into a purchase agreement in connection with a private offering of $400 million in aggregate principal amount of 6.25% Senior Secured Notes due 2026 at an issue price of 101% of the principal amount.

As of March 28, 2020, the Company has significant liquidity as illustrated in the table presented below (in millions):

	As of March 28, 2020
Cash and cash equivalents	$	2,668
Availability on revolving credit facility	518
Liquidity (1)	$	3,186

⁽¹⁾  Excludes approximately $1,500 million in cash received from the April 2020 secured notes offerings.

We believe our significant liquidity will allow us to meet our anticipated funding requirements. We expect to meet our short-term liquidity requirements (including interest obligations and capital expenditures) through net cash from operating activities, cash on hand and, if needed, additional draws on the revolving credit facility. Long-term liquidity requirements consist primarily of obligations under our long-term debt agreements. There is no maturity on any tranche of term loans or notes until July 2024. The Company's $350 million trade receivable securitization facility renews annually in July.

Operating Activities. The Company generated $594 million of net cash from operating activities during the twenty-six week period ended March 28, 2020 compared to $453 million during the twenty-six week period ended March 30, 2019. The increase is primarily attributable to the additional net operating cash inflows generated by the Esterline businesses.

The change in accounts receivable during the twenty-six week period ended March 28, 2020 was a source of cash of $74 million compared to a use of cash of $7 million during the twenty-six week period ended March 30, 2019. The increase in the source of cash of $81 million is primarily attributable to the timing of receipt of payment from customers as well as a slowdown in sales within the last few weeks of the second fiscal quarter due to the COVID-19 pandemic.

The change in inventories during the twenty-six week period ended March 28, 2020 was a use of cash of $97 million compared to a use of cash of $45 million during the twenty-six week period ended March 30, 2019. The increase in the use of cash is primarily driven by the slowdown in sales as a result of the COVID-19 pandemic, particularly within the last few weeks of the second fiscal quarter.

The change in accounts payable during the twenty-six week period ended March 28, 2020 was a use of cash of $12 million compared to a source of cash of $1 million during the twenty-six week period ended March 30, 2019.

Investing Activities. Net cash provided by investing activities was $854 million during the twenty-six week period ended March 28, 2020, consisting of proceeds of $904 million from the divestiture of Souriau-Sunbank and partially offset by capital expenditures of $50 million.

Net cash used in investing activities was $3,613 million during the twenty-six week period ended March 30, 2019, consisting of capital expenditures of $44 million and payments for acquisitions, net of cash acquired, of $3,569 million which is primarily comprised of the acquisition of Esterline for $3,536 million and NavCom for $27 million.

Financing Activities. Net cash used by financing activities during the twenty-six week period ended March 28, 2020 was $248 million. The use of cash was primarily attributable to dividend equivalent payments of $1,928 million, the redemption of the 2022 Notes outstanding for $1,168 million, the purchase of treasury stock of $19 million and repayments on term loans of $19 million. The use of cash was partially offset by $2,625 million in net proceeds from the completion of the 2027 5.50% Notes offering, $200 million in proceeds from the revolving credit facility and $69 million in proceeds from stock option exercises.

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Net cash provided by financing activities during the twenty-six week period ended March 30, 2019 was $3,915 million. The source of cash was primarily attributable to $4,482 million in net proceeds from the completion of the 2026 Secured Notes and 2027 Notes offerings in the second quarter of fiscal 2019 and $47 million in proceeds from stock option exercises. Sources were partially offset by the cash tender and redemption of the 2020 Notes for $550 million, repayments on term loans of $38 million and the payment of $24 million in dividend equivalent payments.

Contractual Obligations

We have future obligations under various contracts relating to debt and interest payments, finance and operating leases, pension and post-retirement benefit plans and purchase obligations. During the twenty six week period ended March 28, 2020, other than the debt financing transactions described below and in Note 9, "Debt," to the condensed consolidated financial statements, there were no material changes to these obligations as reported in our Annual Report on Form 10-K for the fiscal year ended September 30, 2019.

Description of Senior Secured Term Loans and Indentures

Senior Secured Term Loans Facility

TransDigm has $7,505 million in fully drawn term loans (the “Term Loans Facility”) and a $760 million revolving credit facility, on which the Company drew approximately $200 million on March 24, 2020. The Term Loans Facility consists of three tranches of term loans as follows (aggregate principal amount disclosed is as of March 28, 2020):

Term Loans Facility	Aggregate Principal	Maturity Date	Interest Rate
Tranche E	$2,216 million	May 30, 2025	LIBO rate + 2.25%
Tranche F	$3,515 million	December 9, 2025	LIBO rate + 2.25%
Tranche G	$1,774 million	August 22, 2024	LIBO rate + 2.25%

The Term Loans Facility requires quarterly aggregate principal payments of $18.8 million. The revolving commitments consist of two tranches which includes up to $151.5 million of multicurrency revolving commitments. At March 28, 2020, the Company had $41.7 million in letters of credit outstanding and $518.3 million in borrowings available under the revolving commitments. The interest rates per annum applicable to the loans under the Credit Agreement are, at TransDigm’s option, equal to either an alternate base rate or an adjusted LIBO rate for one, two, three or six-month (or to the extent agreed to by each relevant lender, nine or twelve-month) interest periods chosen by TransDigm, in each case plus an applicable margin percentage. The adjusted LIBO rate related to the tranche E, tranche F and tranche G term loans are not subject to a floor. For the twenty-six week period ended March 28, 2020, the applicable interest rates ranged from approximately 3.9% to 4.3% on the existing term loans. Interest rate swaps and caps used to hedge and offset, respectively, the variable interest rates on the credit facility are described in Note 12, “Derivatives and Hedging Activities,” to the condensed consolidated financial statements.

Recent Amendments to the Credit Agreement

On February 6, 2020, the Company entered into Amendment No. 7 and Refinancing Facility Agreement (herein, "Amendment No. 7"). Under the terms of Amendment No. 7, the Company, among other things, (i) incurred new tranche E term loans in an aggregate principal amount equal to approximately $2,216 million, new tranche F term loans in an aggregate principal amount equal to approximately $3,515 million and new tranche G term loans, (collectively, the "New Term Loans") in an aggregate principal amount equal to approximately $1,774 million, (ii) repaid in full all of the existing tranche E term loans, tranche F term loans and tranche G term loans outstanding under the Credit Agreement immediately prior to the Amendment and (iii) extended the maturity date of the tranche F term loans to December 9, 2025, (iv) modified the definition of consolidated EBITDA in the Credit Agreement to add back certain cost savings and non-recurring cost and expenses and (v) modified certain negative covenants to provide additional flexibility to enable TransDigm to incur additional debt and make additional investments and asset sales.

The New Term Loans were fully drawn on February 6, 2020. The LIBOR interest rate per annum applicable to the New Term Loans is 2.25%, down from 2.50% prior to the Amendment. The other terms and conditions that apply to the New Term Loans are substantially the same as the terms and conditions that applied to the term loans immediately prior to the Amendment.

On March 14, 2019, the Company entered into Amendment No. 6 to the Second Amended and Restated Credit Agreement ("Amendment No. 6"). Under the terms of Amendment No. 6, the capacity of the revolving credit facility increased from $600 million to $760 million. The revolving credit facility consist of two tranches which include up to $151.5 million of multicurrency revolving commitments. The terms and conditions that apply to the revolving credit facility, other than the additional revolving credit commitments, are substantially the same as the terms and conditions that applied to the revolving credit facility immediately prior to Amendment No. 6.

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Indentures

The following table represents the notes outstanding as of March 28, 2020:

Description	Aggregate Principal	Maturity Date	Interest Rate
2024 Notes	$1,200 million	July 15, 2024	6.50%
2025 Notes	$750 million	May 15, 2025	6.50%
2026 Secured Notes	$4,000 million	March 15, 2026	6.250%
6.875% 2026 Notes	$500 million	May 15, 2026	6.875%
6.375% 2026 Notes	$950 million	June 15, 2026	6.375%
7.50% 2027 Notes	$550 million	March 15, 2027	7.50%
5.50% 2027 Notes	$2,650 million	November 15, 2027	5.50%

The 2024 Notes, the 6.375% 2026 Notes, the 7.50% 2027 Notes and the 5.50% 2027 Notes (the “TransDigm Inc. Notes”) were issued at a price of 100% of the principal amount. The initial $450 million offering of the 2025 Notes (also considered to be part of the “TransDigm Inc. Notes”) were issued at a price of 100% of the principal amount and the subsequent $300 million offering of 2025 Notes in the second quarter of fiscal 2017 were issued at a price of 101.5% of the principal amount, resulting in gross proceeds of $304.5 million. The 6.875% 2026 Notes (the "TransDigm UK Notes" and together with the TransDigm Inc. Notes, the "Notes," are further described below) offered in May 2018 were issued at a price of 99.24% of the principal amount, resulting in gross proceeds of $496.2 million. The initial $3,800 million offering of the 2026 Secured Notes (the "Secured Notes") were issued at a price of 100% of their principal amount and the subsequent $200 million offering of the 2026 Secured Notes in the second quarter of fiscal 2019 were issued at a price of 101% of their principal amount, resulting in gross proceeds of $4,002 million.

The Notes do not require principal payments prior to their maturity. Interest under the Notes is payable semi-annually. The Notes represent our unsecured obligations ranking subordinate to our senior debt, as defined in the applicable indentures.

The Notes are subordinated to all of our existing and future senior debt, rank equally with all of our existing and future senior subordinated debt and rank senior to all of our future debt that is expressly subordinated to the Notes. The TransDigm Inc. Notes are guaranteed on a senior subordinated unsecured basis by TD Group and TransDigm Inc.'s domestic restricted subsidiaries. The TransDigm UK Notes are guaranteed on a senior subordinated basis by TransDigm Inc., TD Group and TransDigm Inc.'s domestic restricted subsidiaries. The guarantees of the Notes are subordinated to all of the guarantors’ existing and future senior debt, rank equally with all of their existing and future senior subordinated debt and rank senior to all of their future debt that is expressly subordinated to the guarantees of the Notes. The Notes are structurally subordinated to all of the liabilities of TD Group’s non-guarantor subsidiaries. The Notes contain many of the restrictive covenants included in the Credit Agreement. TransDigm is in compliance with all of the covenants contained in the Notes.

On January 30, 2019, the Company entered into a purchase agreement in connection with a private offering of $3.8 billion aggregate principal amount in 6.25% senior secured notes due 2026. In addition, on February 1, 2019, the Company entered into a purchase agreement in connection with a private offering of $200 million aggregate principal amount of 6.25% senior secured notes due 2026. All $4.0 billion aggregate principal amount of the secured notes will constitute a single class and was issued under a single indenture (herein the "2026 Secured Notes"). The notes in the first secured notes offering were issued at a price of 100% of their principal amount and the notes in the second secured notes offering were issued at a price of 101% of their principal amount. The Notes are guaranteed, with certain exceptions, by TransDigm Group, TransDigm UK and all of TransDigm Inc.’s existing U.S. subsidiaries on a senior secured basis. The 2026 Secured Notes offerings closed on February 13, 2019 and mature on March 15, 2026.

On February 13, 2019, the Company announced a cash tender offer for any and all of its outstanding 2020 Notes. On March 15, 2019, the Company redeemed the principal amount of $550 million in 2020 Notes, plus accrued and unpaid interest of approximately $12.6 million. The Company recorded refinancing costs of $1.7 million during the thirteen and thirty-nine week periods ended March 28, 2020 representing unamortized debt issuance costs expensed in conjunction with the redemption of the 2020 Notes.

On March 14, 2019, in connection with the closing of the acquisition of Esterline, the Company announced a cash tender offer for any and all of its outstanding 2023 Notes. On April 15, 2019, the Company redeemed the principal amount of approximately $373.8 million (€330.0 million as the 2023 Notes were denominated in Euros), plus accrued interest of approximately $6.8 million, early redemption premium of $6.8 million and fees of approximately $0.2 million.

On November 13, 2019, the Company issued $2,650 million in aggregate principal amount of 5.50% Senior Subordinated Notes due 2027 (herein the "5.50% 2027 Notes") at an issue price of 100% of the principal amount thereof in a private offering. The 2027 Notes were issued pursuant to an indenture, dated as of November 13, 2019, among TransDigm, as issuer, TD Group, TD UK and the other subsidiaries of TransDigm named therein, as guarantors.

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On November 26, 2019, the Company used a portion of the net proceeds from the offering of the 5.50% 2027 Notes to redeem all of its outstanding 6.00% 2022 Notes. The Company redeemed the principal amount of $1,150 million, plus accrued interest of approximately $25.5 million and early redemption premium of $17.3 million.

In April 2020, the Company executed two notes offerings for general Corporate purposes, including increasing its liquidity as a result of the COVID-19 pandemic. On April 8, 2020, the Company entered into a purchase agreement in connection with a private offering of $1,100 million in aggregate principal amount of 8.00% Senior Secured Notes due 2025 at an issue price of 100% of the principal amount. On April 17, 2020, the Company entered into a purchase agreement in connection with a private offering of $400 million in aggregate principal amount of 6.25% Senior Secured Notes due 2026 at an issue price of 101% of the principal amount. Refer to Note 9, "Debt," to the condensed consolidated financial statements for further information.

Certain Restrictive Covenants in Our Debt Documents

The Credit Agreement and the Indentures governing the Notes contain restrictive covenants that, among other things, limit the incurrence of additional indebtedness, the payment of special dividends, transactions with affiliates, asset sales, acquisitions, mergers and consolidations, liens and encumbrances, and prepayments of certain other indebtedness.

The restrictive covenants included in the Credit Agreement are subject to amendments executed periodically. The most recent amendment that impacted the restrictive covenants contained in the Credit Agreement is Amendment No. 7. The restrictive covenants are described above in the Recent Amendments to the Credit Agreement section.

Under the terms of the Credit Agreement, TransDigm is entitled, on one or more occasions, to request additional term loans or additional revolving commitments to the extent that the existing or new lenders agree to provide such incremental term loans or additional revolving commitments provided that, among other conditions, our consolidated net leverage ratio would be no greater than 7.25 to 1.00 and the consolidated secured net debt ratio would be no greater than 5.00 to 1.00, in each case, after giving effect to such incremental term loans or additional revolving commitments.

If any such default occurs, the lenders under the Credit Agreement and the holders of the Notes may elect to declare all outstanding borrowings, together with accrued interest and other amounts payable thereunder, to be immediately due and payable. The lenders under the Credit Agreement also have the right in these circumstances to terminate any commitments they have to provide further borrowings. In addition, following an event of default under the Credit Agreement, the lenders thereunder will have the right to proceed against the collateral granted to them to secure the debt, which includes our available cash, and they will also have the right to prevent us from making debt service payments on the Notes.

As of March 28, 2020, the Company was in compliance with all of its debt covenants.

Trade Receivables Securitization

During fiscal 2014, the Company established a trade receivable securitization facility (the “Securitization Facility”). The Securitization Facility effectively increases the Company’s borrowing capacity depending on the amount of the domestic operations’ trade accounts receivable. The Securitization Facility includes the right for the Company to exercise annual one year extensions as long as there have been no termination events as defined by the agreement. The Company uses the proceeds from the Securitization Facility as an alternative to other forms of debt, effectively reducing borrowing costs.

On July 30, 2019, the Company amended the Securitization Facility to extend the maturity date to July 28, 2020. As of March 28, 2020, the Company has borrowed $350 million under the Securitization Facility, which bears interest at a rate of 0.9% plus LIBOR. At March 28, 2020, the applicable interest rate was 2.5%. The Securitization Facility is collateralized by substantially all of the Company’s domestic operations’ trade accounts receivable.

Stock Repurchase Program

On November 8, 2017, our Board of Directors, authorized a stock repurchase program permitting repurchases of our outstanding shares not to exceed $650 million in the aggregate, subject to any restrictions specified in the Credit Agreement and/or Indentures governing the existing Notes.

During March 2020, the Company repurchased 36,900 shares of its common stock at a gross cost of $18.9 million at the weighted average cost of $512.67 under the $650 million stock repurchase program. As of March 28, 2020, the remaining amount of repurchases allowable under the $650 million program was $631.1 million subject to any restrictions specified in the Credit Agreement and/or Indentures governing the existing Notes.

Off-Balance Sheet Arrangements

The Company utilizes letters of credit to back certain payment and performance obligations. Letters of credit are subject to limits based on amounts outstanding under the Company’s revolving credit facility. As of March 28, 2020, the Company had $41.7 million in letters of credit outstanding.

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Non-GAAP Financial Measures

We present below certain financial information based on our EBITDA and EBITDA As Defined. References to “EBITDA” mean earnings before interest, taxes, depreciation and amortization, and references to “EBITDA As Defined” mean EBITDA plus, as applicable for each relevant period, certain adjustments as set forth in the reconciliations of net income to EBITDA and EBITDA As Defined and the reconciliations of net cash provided by operating activities to EBITDA and EBITDA As Defined presented below.

Neither EBITDA nor EBITDA As Defined is a measurement of financial performance under accounting principles generally accepted in the United States of America (“US GAAP”). We present EBITDA and EBITDA As Defined because we believe they are useful indicators for evaluating operating performance and liquidity.

Our management believes that EBITDA and EBITDA As Defined are useful as indicators of liquidity because securities analysts, investors, rating agencies and others use EBITDA to evaluate a company’s ability to incur and service debt. In addition, EBITDA As Defined is useful to investors because the revolving credit facility under our senior secured credit facility requires compliance under certain circumstances, on a pro forma basis, with a financial covenant that measures the ratio of the amount of our secured indebtedness to the amount of our Consolidated EBITDA defined in the same manner as we define EBITDA As Defined herein.

In addition to the above, our management uses EBITDA As Defined to review and assess the performance of the management team in connection with employee incentive programs and to prepare its annual budget and financial projections. Moreover, our management uses EBITDA As Defined to evaluate acquisitions.

Although we use EBITDA and EBITDA As Defined as measures to assess the performance of our business and for the other purposes set forth above, the use of these non-GAAP financial measures as analytical tools has limitations, and you should not consider any of them in isolation, or as a substitute for analysis of our results of operations as reported in accordance with US GAAP. Some of these limitations are:

• neither EBITDA nor EBITDA As Defined reflects the significant interest expense, or the cash requirements, necessary to service interest payments on our indebtedness;

• although depreciation and amortization are non-cash charges, the assets being depreciated and amortized will often have to be replaced in the future, and neither EBITDA nor EBITDA As Defined reflects any cash requirements for such replacements;

• the omission of the substantial amortization expense associated with our intangible assets further limits the usefulness of EBITDA and EBITDA As Defined;

• neither EBITDA nor EBITDA As Defined includes the payment of taxes, which is a necessary element of our operations; and

• EBITDA As Defined excludes the cash expense we have incurred to integrate acquired businesses into our operations, which is a necessary element of certain of our acquisitions.

Because of these limitations, EBITDA and EBITDA As Defined should not be considered as measures of discretionary cash available to us to invest in the growth of our business. Management compensates for these limitations by not viewing EBITDA or EBITDA As Defined in isolation and specifically by using other US GAAP measures, such as net income, net sales and operating profit, to measure our operating performance. Neither EBITDA nor EBITDA As Defined is a measurement of financial performance under US GAAP, and neither should be considered as an alternative to net income or cash flow from operations determined in accordance with US GAAP. Our calculation of EBITDA and EBITDA As Defined may not be comparable to the calculation of similarly titled measures reported by other companies.

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The following table sets forth a reconciliation of net income to EBITDA and EBITDA As Defined (in millions):

	Thirteen Week Periods Ended					Twenty-Six Week Periods Ended
	March 28, 2020			March 30, 2019		March 28, 2020		March 30, 2019
Income from continuing operations	$	323		$	200	$	556	$	396
Adjustments:
Depreciation and amortization expense	72			39		141		74
Interest expense, net	252			202		501		374
Income tax provision	14			63		73		117
EBITDA	661			504		1,271		961
Adjustments:
Inventory acquisition accounting adjustments (1)	—			16		—		20
Acquisition integration costs (2)	9			5		15		7
Acquisition transaction-related expenses (3)	—			17		1		22
Non-cash stock compensation expense (4)	11			21		37		38
Refinancing costs (5)	3			3		26		3
Other, net (6)	(9		)	—		6		2
EBITDA As Defined	$	675		$	566	$	1,356	$	1,053

⁽¹⁾  Represents accounting adjustments to inventory associated with acquisitions of businesses and product lines that were charged to cost of sales when the inventory was sold.

⁽²⁾  Represents costs incurred to integrate acquired businesses and product lines into TD Group’s operations, facility relocation costs and other acquisition-related costs.

⁽³⁾  Represents transaction-related costs comprising deal fees, legal, financial and tax due diligence expenses, and valuation costs that are required to be expensed as incurred.

⁽⁴⁾  Represents the compensation expense recognized by TD Group under our stock incentive plans.

⁽⁵⁾  Represents costs expensed related to debt financing activities, including new issuances, extinguishments, refinancings and amendments to existing agreements.

⁽⁶⁾  Primarily represents foreign currency transaction gain or loss, payroll withholding taxes related to dividend equivalent payments and stock option exercises, non-service related pension costs, deferred compensation, and gain or loss on sale of fixed assets.

52

The following table sets forth a reconciliation of net cash provided by operating activities to EBITDA and EBITDA As Defined (in millions):

	Twenty-Six Week Periods Ended
	March 28, 2020			March 30, 2019
Net cash provided by operating activities	$	594		$	453
Adjustments:
Changes in assets and liabilities, net of effects from acquisitions of businesses	173			64
Interest expense, net (1)	485			361
Income tax provision - current	82			124
Non-cash stock compensation expense (2)	(37		)	(38		)
Refinancing costs (3)	(26		)	(3		)
EBITDA	1,271			961
Adjustments:
Inventory acquisition accounting adjustments (4)	—			20
Acquisition integration costs (5)	15			7
Acquisition transaction-related expenses (6)	1			22
Non-cash stock compensation expense (2)	37			38
Refinancing costs (3)	26			3
Other, net (7)	6			2
EBITDA As Defined	$	1,356		$	1,053

⁽¹⁾  Represents interest expense excluding the amortization of debt issuance costs and premium and discount on debt.

⁽²⁾  Represents the compensation expense recognized by TD Group under our stock incentive plans.

⁽³⁾  Represents costs expensed related to debt financing activities, including new issuances, extinguishments, refinancings and amendments to existing agreements.

⁽⁴⁾  Represents accounting adjustments to inventory associated with acquisitions of businesses and product lines that were charged to cost of sales when the inventory was sold.

⁽⁵⁾  Represents costs incurred to integrate acquired businesses and product lines into TD Group’s operations, facility relocation costs and other acquisition-related costs.

⁽⁶⁾  Represents transaction-related costs comprising deal fees; legal, financial and tax due diligence expenses, and valuation costs that are required to be expensed as incurred.

⁽⁷⁾  Primarily represents foreign currency transaction gain or loss, payroll withholding taxes related to dividend equivalent payments and stock option exercises, non-service related pension costs, deferred compensation, and gain or loss on sale of fixed assets.

53

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK

The information called for by this item is provided under the caption 'Description of Senior Secured Credit Facilities and Indentures' under Item 2 - "Management's Discussion and Analysis of Financial Condition and Results of Operations." Market risks are described more fully within “Quantitative and Qualitative Disclosures About Market Risk” in Part II, Item 7A of our most recent Form 10-K (for the fiscal year ended September 30, 2019).

Except for the broad effects of the COVID-19 pandemic as a result of its negative impact on the global economy and major financial markets, the market risks have not materially changed since the date our most recent Form 10-K was filed with the SEC.

ITEM 4. CONTROLS AND PROCEDURES

As of March 28, 2020, TD Group carried out an evaluation, under the supervision and with the participation of TD Group’s management, including its President, Chief Executive Officer and Director (Principal Executive Officer) and Chief Financial Officer (Principal Financial Officer), of the effectiveness of the design and operation of TD Group’s disclosure controls and procedures. Based upon that evaluation, the President, Chief Executive Officer and Director and Chief Financial Officer concluded that TD Group’s disclosure controls and procedures are effective to ensure that information required to be disclosed by TD Group in the reports it files or submits under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported, within the time periods specified by the Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to TD Group’s management, including the President, Chief Executive Officer and Director and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, TD Group’s management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management necessarily was required to apply its judgment in designing and evaluating the controls and procedures.

Changes in Internal Control over Financial Reporting

There have been no changes in the Company’s internal control over financial reporting that occurred during the fiscal quarter ended March 28, 2020, that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

54

PART II: OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

We and certain of our current or former officers and directors are defendants in a consolidated securities class action captioned In re TransDigm Group, Inc. Securities Litigation, Case No. 1:17-cv-01677-DCN (N.D. Ohio). The cases were originally filed on August 10, 2017, and September 18, 2017 and were consolidated on December 5, 2017. The plaintiffs allege that the defendants made false or misleading statements with respect to, or failed to disclose, the impact of certain alleged business practices in connection with sales to the U.S. government on the Company’s growth and profitability. The plaintiffs assert claims under Section 10(b) of the Exchange Act and Rule 10b-5 promulgated thereunder and Section 20(a) of the Exchange Act, and seek unspecified monetary damages and other relief. On February 19, 2020, the Court granted our motion to dismiss and the case was dismissed. The plaintiffs appealed the decision on March 18, 2020. We intend to continue to vigorously defend the consolidated securities class action on appeal and believe it is without merit. We also believe we have sufficient insurance coverage available. Therefore, we do not expect these matters to have a material adverse impact on our financial condition or results of operations. If we were to lose the appeal of the Court’s entry of dismissal, it would be difficult at this time to estimate a range of any potential loss. In addition, we, as nominal defendant, and certain of our current or former officers and directors were sued defendants in a shareholder derivative action captioned Sciabacucchi v. Howley et al., No. 1:17-cv-1971-DCN (N.D. Ohio). The case was filed on September 19, 2017. The plaintiffs alleged breach of fiduciary duty and other claims arising out of substantially the same actions or inactions alleged in the securities class action described above. This action has been dismissed without prejudice in light of the Court’s dismissal of the consolidated securities class action. Plaintiff has appealed the dismissal.

ITEM 1A. RISK FACTORS

In addition to the other information set forth in this report, you should carefully consider the risk factors disclosed in Item 1A of our Annual Report on Form 10-K for the fiscal year ended September 30, 2019, filed on November 19, 2019. The material changes to the risk factors for the second quarter of fiscal 2020 are described below.

Set forth below are important risks and uncertainties that could negatively affect our business and financial condition and could cause our actual results to differ materially from those expressed in forward-looking statements contained in this report.

We face risks related to the current COVID-19 pandemic and other health epidemics and outbreaks.

The global outbreak of COVID-19 is currently impacting countries, communities, supply chains, and markets. As of March 28, 2020, the COVID-19 pandemic was beginning to adversely impact our commercial aftermarket sales and we believe that the COVID-19 pandemic will also adversely impact our commercial OEM and aftermarket sales for an indeterminate length of time. The impact of the COVID-19 pandemic is fluid and continues to evolve, and therefore, we cannot predict the extent to which our business, results of operations, financial condition or liquidity will ultimately be impacted. Because this situation is ongoing and because the duration and severity of the outbreak are unclear, it is difficult to forecast any impacts on the Company’s future results. However, we currently expect COVID-19 to have a significant adverse impact on our sales, net income and EBITDA as Defined for the remainder of fiscal 2020 under the assumption that the COVID-19 outbreak will adversely affect our non-defense customers and their demand for our products and services for at least in the near term.

The COVID-19 pandemic has also disrupted our operations. The outbreak of COVID-19 has heightened the risk that a significant portion of our workforce will suffer illness or otherwise be unable to work. Furthermore, in light of our determination that planned reductions in our workforce were necessary as a result of declines in our business caused by the COVID-19 pandemic, we cannot assure that we will be able to rehire our entire workforce once our business has recovered. Certain of our facilities have experienced temporary disruptions as a result of the COVID-19 pandemic, and we cannot predict whether our facilities will experience more significant disruptions in the future. Finally, our acquisition strategy, which is a key element of our overall business strategy, may be impacted by our efforts to maintain the Company’s liquidity position in response to the COVID-19 pandemic.

The impact of COVID-19 may also exacerbate other risks discussed in Item 1A, “Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended September 30, 2019, any of which could have a material effect on us. This situation continues to evolve and additional impacts may arise that we are not aware of currently.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS: PURCHASES OF EQUITY SECURITIES BY THE ISSUER

On November 8, 2017, our Board of Directors, authorized a stock repurchase program permitting repurchases of our outstanding shares not to exceed $650 million in the aggregate, subject to any restrictions specified in the Credit Agreement and/or Indentures governing the existing Notes.

55

During March 2020, the Company repurchased 36,900 shares of its common stock at a gross cost of $18.9 million at the weighted average cost of $512.67 under the $650 million stock repurchase program. As of March 28, 2020, the remaining amount of repurchases allowable under the $650 million program was $631.1 million subject to any restrictions specified in the Credit Agreement and/or Indentures governing the existing Notes.

56

ITEM 6. EXHIBITS

Exhibit No.	Description
4.1	Indenture, dated as of February 13, 2019, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, The Bank of New York Mellon Trust Company, N.A., as trustee and US collateral agent, and The Bank of New York Mellon, as UK collateral agent, relating to TransDigm Inc.’s 6.25% Senior Secured Notes due 2026 (incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed February 13, 2019 (File No. 001-32833)).
4.2	Form of 6.25% Senior Secured Notes due 2026 (included in Exhibit 4.1).
4.3	Third Supplemental Indenture, dated as of April 17, 2020, among TransDigm Inc., TransDigm Group Incorporated, the subsidiary guarantors party thereto, The Bank of New York Mellon Trust Company, N.A., as trustee and US collateral agent, and The Bank of New York Mellon, as UK collateral agent, relating to TransDigm Inc.’s 6.25% Senior Secured Notes due 2026.
4.4	Indenture, dated as of April 8, 2020, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, The Bank of New York Mellon Trust Company, N.A., as trustee and US collateral agent, and The Bank of New York Mellon, as UK collateral agent, relating to TransDigm Inc.’s 8.00% Senior Secured Notes due 2025.
4.5	Form of 8.00% Senior Secured Notes due 2025 (included in Exhibit 4.4).
10.1	Amendment No. 7 and Refinancing Facility Agreement, dated as of February 6, 2020, to the Second Amended and Restated Credit Agreement, dated as of June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Credit Suisse AG, as administrative agent and collateral agent for the lenders.
31.1	Certification by Principal Executive Officer of TransDigm Group Incorporated pursuant to Rule 13a-14(a) or 15d- 14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification by Principal Financial Officer of TransDigm Group Incorporated pursuant to Rule 13a-14(a) or 15d- 14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification by Principal Executive Officer of TransDigm Group Incorporated pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification by Principal Financial Officer of TransDigm Group Incorporated pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	Inline XBRL Instance Document: The XBRL Instance Document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	Inline XBRL Taxonomy Extension Schema
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase
104	Cover Page Interactive Data File: the cover page XBRL tags are embedded within the Inline XBRL document and are contained within Exhibit 101.

57

SIGNATURES

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

TRANSDIGM GROUP INCORPORATED

SIGNATURE	TITLE	DATE
/s/ Kevin Stein	President, Chief Executive Officer and Director (Principal Executive Officer)	May 5, 2020
Kevin Stein
/s/ Michael Lisman	Chief Financial Officer (Principal Financial Officer)	May 5, 2020
Michael Lisman

58

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Kevin Stein, certify that:

1. I have reviewed this quarterly report on Form 10-Q of TransDigm Group Incorporated;

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

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

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

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

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

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

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s second fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors:

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

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

Date: May 5, 2020

/s/ Kevin Stein

Name: Kevin Stein

Title: President, Chief Executive Officer and Director

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Michael Lisman, certify that:

1. I have reviewed this quarterly report on Form 10-Q of TransDigm Group Incorporated;

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

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

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

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

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

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

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s second fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s Board of Directors:

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

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

Date: May 5, 2020

/s/ Michael Lisman

Name: Michael Lisman

Title: Chief Financial Officer

(Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of TransDigm Group Incorporated (the “Company”) for the quarter ended March 28, 2020 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Kevin Stein, President, Chief Executive Officer and Director (Principal Executive Officer), certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities and Exchange Act of 1934; and

2. The information contained in the Report fairly presents in all material respects, the financial condition of the Company as of the dates indicated and results of operations of the Company for the periods indicated.

Date: May 5, 2020

/s/ Kevin Stein

Name: Kevin Stein

Title: President, Chief Executive Officer and Director

(Principal Executive Officer)

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of TransDigm Group Incorporated (the “Company”) for the quarter ended March 28, 2020 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Michael Lisman, Chief Financial Officer (Principal Financial Officer) certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities and Exchange Act of 1934; and

2. The information contained in the Report fairly presents in all material respects, the financial condition of the Company as of the dates indicated and results of operations of the Company for the periods indicated.

Date: May 5, 2020

/s/ Michael Lisman

Name: Michael Lisman

Title: Chief Financial Officer

(Principal Financial Officer)

XML

SUPPLEMENTAL GUARANTOR INFORMATION

6 Months Ended

Mar. 28, 2020

Condensed Financial Information Disclosure [Abstract]

SUPPLEMENTAL GUARANTOR INFORMATION

SUPPLEMENTAL GUARANTOR INFORMATION

TransDigm Inc.’s 2024 Notes, 2025 Notes, 6.375% 2026 Notes, 2026 Secured Notes, 7.50% 2027 Notes and 5.50% 2027 Notes are jointly and severally guaranteed, on a senior subordinated basis, by TD Group, TransDigm UK Holdings plc ("TransDigm UK") and TransDigm Inc.’s Domestic Restricted Subsidiaries, as defined in the applicable Indentures. TransDigm UK's 6.875% 2026 Notes are jointly and severally guaranteed, on a senior subordinated basis, by TD Group, TransDigm Inc. and TransDigm Inc.'s Domestic Restricted Subsidiaries as defined in the applicable indenture. The following supplemental condensed consolidating financial information presents, in separate columns, the balance sheets of the Company as of March 28, 2020 and September 30, 2019 and its statements of income and comprehensive income and cash flows for the twenty-six week periods ended March 28, 2020 and March 30, 2019 for (i) TransDigm Group on a parent only basis with its investment in subsidiaries recorded under the equity method, (ii) TransDigm Inc. including its directly owned operations and non-operating entities, excluding TransDigm UK, (iii) TransDigm UK (iv) the Subsidiary Guarantors (other than TransDigm UK) on a combined basis, (v) Non-Guarantor Subsidiaries and (vi) the Company on a consolidated basis.

Separate financial statements of TransDigm Inc. are not presented because TransDigm Inc.’s 2024 Notes, 2025 Notes, 6.375% 2026 Notes, 2026 Secured Notes, 7.50% 2027 Notes and 5.50% 2027 Notes are fully and unconditionally guaranteed on a senior subordinated basis by TD Group, TransDigm UK and all of TransDigm Inc's Domestic Restricted Subsidiaries and because TD Group has no significant operations or assets separate from its investment in TransDigm Inc.

Separate financial statements of TransDigm UK are not presented because TransDigm UK's 6.875% 2026 Notes, issued in May 2018, are fully and unconditionally guaranteed on a senior subordinated basis by TD Group, TransDigm Inc. and all of TransDigm Inc.'s Domestic Restricted Subsidiaries.

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF MARCH 28, 2020

(Amounts in millions)

	TransDigm Group			TransDigm Inc.		TransDigm UK		Subsidiary Guarantors			Non- Guarantor Subsidiaries		Eliminations			Total Consolidated
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	21		$	2,245	$	1	$	(15	)	$	416	$	—		$	2,668
Trade accounts receivable - Net	—			—		—		147			852		—			999
Inventories - Net	—			56		—		936			338		(17		)	1,313
Prepaid expenses and other	—			92		—		63			65		—			220
Total current assets	21			2,393		1		1,131			1,671		(17		)	5,200
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	(4,230		)	17,962		974		19,222			9,680		(43,608		)	—
PROPERTY, PLANT AND  EQUIPMENT - NET	—			18		—		512			218		—			748
GOODWILL	—			83		—		6,413			1,350		—			7,846
OTHER INTANGIBLE ASSETS - NET	—			25		—		2,025			619		—			2,669
DEFERRED INCOME TAXES	—			—		—		—			13		—			13
OTHER	—			9		—		104			46		—			159
TOTAL ASSETS	$	(4,209	)	$	20,490	$	975	$	29,407		$	13,597	$	(43,625	)	$	16,635
LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY
CURRENT LIABILITIES:
Current portion of long-term debt	$	—		$	275	$	—	$	1		$	3	$	—		$	279
Short-term borrowings - trade receivable securitization facility	—			—		—		—			350		—			350
Accounts payable	—			17		—		151			98		—			266
Accrued liabilities	—			249		13		239			260		—			761
Total current liabilities	—			541		13		391			711		—			1,656
LONG-TERM DEBT	—			17,368		492		42			31		—			17,933
DEFERRED INCOME TAXES	—			—		—		289			96		—			385
OTHER NON-CURRENT LIABILITIES	—			434		—		268			164		—			866
Total liabilities	—			18,343		505		990			1,002		—			20,840
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	(4,209		)	2,147		470		28,417			12,591		(43,625		)	(4,209		)
NONCONTROLLING INTERESTS	—			—		—		—			4		—			4
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	$	(4,209	)	$	20,490	$	975	$	29,407		$	13,597	$	(43,625	)	$	16,635

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF SEPTEMBER 30, 2019

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK		Subsidiary Guarantors			Non- Guarantor Subsidiaries		Eliminations			Total Consolidated
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	—		$	1,092		$	—	$	(12	)	$	387	$	—		$	1,467
Trade accounts receivable - Net	—			—			—		172			896		—			1,068
Inventories - Net	—			52			—		880			316		(15		)	1,233
Assets held-for-sale	—			—			—		206			756		—			962
Prepaid expenses and other	—			27			—		45			63		—			135
Total current assets	—			1,171			—		1,291			2,418		(15		)	4,865
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	(2,894		)	14,729			975		16,373			6,898		(36,081		)	—
PROPERTY, PLANT AND EQUIPMENT - NET	—			17			—		513			227		—			757
GOODWILL	—			83			—		5,544			2,193		—			7,820
OTHER INTANGIBLE ASSETS - NET	—			25			—		2,064			655		—			2,744
OTHER	—			6			—		35			28		—			69
TOTAL ASSETS	$	(2,894	)	$	16,031		$	975	$	25,820		$	12,419	$	(36,096	)	$	16,255
LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY
CURRENT LIABILITIES:
Current portion of long-term debt	$	—		$	76		$	—	$	1		$	3	$	—		$	80
Short-term borrowings - trade receivable securitization facility	—			—			—		—			350		—			350
Accounts payable	—			17			—		160			99		—			276
Accrued liabilities	—			215			12		237			211		—			675
Liabilities held-for-sale	—			—			—		22			135		—			157
Total current liabilities	—			308			12		420			798		—			1,538
LONG-TERM DEBT	—			15,893			492		49			35		—			16,469
DEFERRED INCOME TAXES	—			—			—		347			94		—			441
OTHER NON-CURRENT LIABILITIES	—			315			—		233			143		—			691
Total liabilities	—			16,516			504		1,049			1,070		—			19,139
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	(2,894		)	(485		)	471		24,771			11,339		(36,096		)	(2,894		)
NONCONTROLLING INTERESTS	—			—			—		—			10		—			10
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	$	(2,894	)	$	16,031		$	975	$	25,820		$	12,419	$	(36,096	)	$	16,255

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF INCOME AND COMPREHENSIVE INCOME

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 28, 2020

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK			Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET SALES	$	—		$	84		$	—		$	2,249		$	690		$	(115	)	$	2,908
COST OF SALES	—			46			—			953			404			(115		)	1,288
GROSS PROFIT	—			38			—			1,296			286			—			1,620
SELLING AND ADMINISTRATIVE EXPENSES	—			91			—			193			97			—			381
AMORTIZATION OF INTANGIBLE ASSETS	—			—			—			60			26			—			86
INCOME (LOSS) FROM OPERATIONS	—			(53		)	—			1,043			163			—			1,153
INTEREST EXPENSE (INCOME)—NET	—			504			18			(22		)	1			—			501
REFINANCING COSTS	—			26			—			—			—			—			26
OTHER (INCOME) EXPENSE	—			(5		)	(18		)	4			16			—			(3		)
EQUITY IN INCOME OF SUBSIDIARIES	(623		)	(1,087		)	—			—			—			1,710			—
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	623			509			—			1,061			146			(1,710		)	629
INCOME TAX PROVISION	—			—			—			54			19			—			73
INCOME FROM CONTINUING OPERATIONS	623			509			—			1,007			127			(1,710		)	556
INCOME (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAX	—			114			—			—			(46		)	—			68
NET INCOME	623			623			—			1,007			81			(1,710		)	624
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			—			(1		)	—			(1		)
NET INCOME ATTRIBUTABLE TO TD GROUP	$	623		$	623		$	—		$	1,007		$	80		$	(1,710	)	$	623
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX	(124		)	(122		)	—			4			31			87			(124		)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO TD GROUP	$	499		$	501		$	—		$	1,011		$	111		$	(1,623	)	$	499

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF INCOME AND COMPREHENSIVE INCOME

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 30, 2019

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK			Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET SALES	$	—		$	88		$	—		$	1,755		$	378		$	(60	)	$	2,161
COST OF SALES	—			66			—			724			217			(60		)	947
GROSS PROFIT	—			22			—			1,031			161			—			1,214
SELLING AND ADMINISTRATIVE EXPENSES	—			101			—			147			34			—			282
AMORTIZATION OF INTANGIBLE ASSETS	—			2			—			35			5			—			42
(LOSS) INCOME FROM OPERATIONS	—			(81		)	—			849			122			—			890
INTEREST EXPENSE (INCOME)—NET	—			378			9			(3		)	(10		)	—			374
REFINANCING COSTS	—			3			—			—			—			—			3
EQUITY IN INCOME OF SUBSIDIARIES	(398		)	(726		)	—			—			—			1,124			—
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	398			264			(9		)	852			132			(1,124		)	513
INCOME TAX (BENEFIT) PROVISION	—			(134		)	—			234			17			—			117
INCOME (LOSS) FROM CONTINUING OPERATIONS	398			398			(9		)	618			115			(1,124		)	396
INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX	—			—			—			—			2			—			2
NET INCOME	398			398			(9		)	618			117			(1,124		)	398
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			—			—			—			—
NET INCOME (LOSS) ATTRIBUTABLE TO TD GROUP	$	398		$	398		$	(9	)	$	618		$	117		$	(1,124	)	$	398
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX	(161		)	(123		)	—			12			(99		)	210			(161		)
TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TD GROUP	$	237		$	275		$	(9	)	$	630		$	18		$	(914	)	$	237

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 28, 2020

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK		Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	—		$	(348	)	$	1	$	668		$	272		$	1		$	594
INVESTING ACTIVITIES:
Capital expenditures	—			(2		)	—		(37		)	(11		)	—			(50		)
Proceeds in connection with sale of discontinued operations, net	—			904			—		—			—			—			904
Net cash provided by (used in) investing activities	—			902			—		(37		)	(11		)	—			854
FINANCING ACTIVITIES:
Intercompany activities	1,899			(1,031		)	—		(634		)	(233		)	(1		)	—
Proceeds from exercise of stock options	69			—			—		—			—			—			69
Dividends and dividend equivalent payments	(1,928		)	—			—		—			—			—			(1,928		)
Treasury stock purchased	(19		)	—			—		—			—			—			(19		)
Proceeds from revolving credit facility	—			200			—		—			—			—			200
Repayments on term loans	—			(19		)	—		—			—			—			(19		)
Redemption of senior subordinated notes due 2022, net	—			(1,168		)	—		—			—			—			(1,168		)
Proceeds from 5.50% senior subordinated notes due 2027, net	—			2,625			—		—			—			—			2,625
Financing fees and other, net	—			(8		)	—		—			—			—			(8		)
Net cash provided by (used in) financing activities	21			599			—		(634		)	(233		)	(1		)	(248		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	—			—			—		—			1			—			1
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	21			1,153			1		(3		)	29			—			1,201
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	—			1,092			—		(12		)	387			—			1,467
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	21		$	2,245		$	1	$	(15	)	$	416		$	—		$	2,668

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 30, 2019

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK			Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	—		$	(64	)	$	4		$	469		$	35		$	9		$	453
INVESTING ACTIVITIES:
Capital expenditures	—			(2		)	—			(36		)	(6		)	—			(44		)
Payments made in connection with acquisitions, net of cash acquired	—			(3,538		)	—			(31		)	—			—			(3,569		)
Net cash used in investing activities	—			(3,540		)	—			(67		)	(6		)	—			(3,613		)
FINANCING ACTIVITIES:
Intercompany activities	(23		)	(701		)	(4		)	(407		)	1,144			(9		)	—
Proceeds from exercise of stock options	47			—			—			—			—			—			47
Dividends and dividend equivalent payments	(24		)	—			—			—			—			—			(24		)
Repayment on term loans	—			(38		)	—			—			—			—			(38		)
Cash tender and redemption of senior subordinated notes due 2020	—			(550		)	—			—			—			—			(550		)
Proceeds from senior subordinated notes, net	—			545			—			—			—			—			545
Proceeds from senior secured notes due 2026, net	—			3,937			—			—			—			—			3,937
Financing fees and other, net	—			2			—			(2		)	(2		)	—			(2		)
Net cash provided by (used in) financing activities	—			3,195			(4		)	(409		)	1,142			(9		)	3,915
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	—			—			—			—			1			—			1
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	—			(409		)	—			(7		)	1,172			—			756
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	—			1,821			—			(2		)	254			—			2,073
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	—		$	1,412		$	—		$	(9	)	$	1,426		$	—		$	2,829

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ACCUMULATED OTHER COMPREHENSIVE LOSS

6 Months Ended

Mar. 28, 2020

Equity [Abstract]

ACCUMULATED OTHER COMPREHENSIVE LOSS

ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME

The following table presents the components of accumulated other comprehensive (loss) income, net of taxes, for the twenty-six week period ended March 28, 2020 (in millions):

	Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges (1)			Defined benefit pension plan activity (2)			Currency translation adjustment			Total
Balance at September 30, 2019	$	(172	)	$	(40	)	$	(167	)	$	(379	)
Current-period other comprehensive (loss) income	(122		)	6			(8		)	(124		)
Balance at March 28, 2020	$	(294	)	$	(34	)	$	(175	)	$	(503	)

⁽¹⁾  Unrealized loss represents derivative instruments, net of taxes of $43 million and $19 million for the thirteen week periods ended March 28, 2020 and March 30, 2019, respectively, and $34 million and $41 million for the twenty-six week periods ended March 28, 2020 and March 30, 2019, respectively.

⁽²⁾  There were no material pension liability adjustments, net of taxes for the thirteen and twenty-six week periods ended March 28, 2020 and March 30, 2019.

A summary of reclassifications out of accumulated other comprehensive (loss) income for the twenty-six week periods ended March 28, 2020 and March 30, 2019 is provided below (in millions):

	Amount reclassified
	Twenty-Six Week Periods Ended
Description of reclassifications out of accumulated other comprehensive (loss) income	March 28, 2020		March 30, 2019
Amortization from redesignated interest rate swap and cap agreements (1)	$	2	$	1
Losses from settlement of foreign currency forward exchange contracts (2)	—		1
Deferred tax benefit on reclassifications out of accumulated other comprehensive (loss) income	—		(1		)
Losses reclassified into earnings, net of tax	$	2	$	1

⁽¹⁾  This component of accumulated other comprehensive (loss) income is included in interest expense (see Note 12, “Derivatives and Hedging Activities,” for additional information).

⁽²⁾ 

This component of accumulated other comprehensive (loss) income is included in net sales (see Note 12, “Derivatives and Hedging Activities,” for additional information).

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SEGMENTS - Total Assets by Segment (Details) - USD ($) $ in Millions	Mar. 28, 2020	Sep. 30, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 16,635	$ 16,255
Operating Segments | Power & Control
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	7,114	7,037
Operating Segments | Airframe
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	6,738	6,672
Operating Segments | Non- aviation
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	259	262
Corporate, Non-Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,524	1,322
Discontinued Operations, Held-for-sale [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 0	$ 962

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DERIVATIVES AND HEDGING ACTIVITIES - Narratives (Details) - USD ($) $ in Millions		6 Months Ended
		Mar. 28, 2020	Mar. 30, 2019
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges (1) | Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative [Line Items]
Interest Expense	[1]	$ (2.0)	$ (1.0)
Interest Rate Swap and Cap
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer		12 months
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred		$ 39.4
Interest Rate Cap | Tranche F
Derivative [Line Items]
Derivative, Cap Interest Rate		2.50%
Interest Rate Cap | Tranche G [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 400.0
Interest rate swap beginning June 30, 2020 [Member] | Tranche E
Derivative [Line Items]
Derivative, Notional Amount		$ 750.0
Derivative, Fixed Interest Rate		5.00%
Derivative, Variable Interest Rate		2.50%
Derivative, Basis Spread on Variable Rate		2.50%
Interest rate cap beginning September 30, 2015 [Member] | Tranche E
Derivative [Line Items]
Derivative, Notional Amount		$ 750.0
Derivative, Cap Interest Rate		2.50%
Interest rate cap agreements beginning June 30, 2016 [Member] | Tranche F
Derivative [Line Items]
Derivative, Notional Amount		$ 400.0
Derivative, Cap Interest Rate		2.00%
Interest Rate Swap | Tranche F
Derivative [Line Items]
Derivative, Notional Amount		$ 1,000.0
Derivative, Fixed Interest Rate		4.90%
Derivative, Variable Interest Rate		2.40%
Derivative, Basis Spread on Variable Rate		2.50%
Interest Rate Swap | Tranche G [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 500.0
Derivative, Fixed Interest Rate		4.40%
Derivative, Variable Interest Rate		1.90%
Derivative, Basis Spread on Variable Rate		2.50%
Interest rate swap beginning September 30, 2017 [Member] | Tranche G [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 400.0
Derivative, Fixed Interest Rate		4.40%
Derivative, Variable Interest Rate		1.90%
Derivative, Basis Spread on Variable Rate		2.50%
Interest rate swap June 28, 2016 [Member] | Tranche F
Derivative [Line Items]
Derivative, Fixed Interest Rate		4.30%
Derivative, Variable Interest Rate		1.80%
Derivative, Basis Spread on Variable Rate		2.50%
Interest rate swap beginning March 31, 2016 [Member] | Tranche E
Derivative [Line Items]
Derivative, Notional Amount		$ 750.0
Derivative, Fixed Interest Rate		5.30%
Derivative, Variable Interest Rate		2.80%
Derivative, Basis Spread on Variable Rate		2.50%
Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 145.9
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Gross Amount to be Transferred		9.9
Selling, General and Administrative Expenses [Member]
Derivative [Line Items]
Gain (Loss) on foreign currency contracts not designated as accounting hedges		0.3
Sales [Member]
Derivative [Line Items]
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net		$ 1.8

[1] This component of accumulated other comprehensive (loss) income is included in interest expense (see Note 12, “Derivatives and Hedging Activities,” for additional information).

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ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Amounts Recognized in Other Comprehensive Loss (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Deferred tax benefit on reclassifications out of accumulated other comprehensive (loss) income		$ (14,000)	$ (63,000)	$ (73,000)	$ (117,000)
Losses reclassified into earnings, net of tax		$ 319,000	$ 202,000	624,000	398,000
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges (1) | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization from redesignated interest rate swap and cap agreements (1)	[1]			2,000	1,000
Losses from settlement of foreign currency forward contracts	[2]			0	1,000
Deferred tax benefit on reclassifications out of accumulated other comprehensive (loss) income				0	(1,000)
Losses reclassified into earnings, net of tax				$ 2,000	$ 1,000

[1] This component of accumulated other comprehensive (loss) income is included in interest expense (see Note 12, “Derivatives and Hedging Activities,” for additional information).

[2] This component of accumulated other comprehensive (loss) income is included in net sales (see Note 12, “Derivatives and Hedging Activities,” for additional information).

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DESCRIPTION OF THE BUSINESS - Narratives (Details)	Mar. 28, 2020
Accounting Policies [Abstract]
Percentage of ownership in subsidiary	100.00%

XML

REVENUE (Details) $ in Millions	3 Months Ended
	Dec. 29, 2018 USD ($)
Cumulative Effect on Retained Earnings, Net of Tax	$ 3
Accounting Standards Update 2014-09 | Accumulated Deficit
Cumulative Effect on Retained Earnings, Net of Tax	$ 3

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UNAUDITED INTERIM FINANCIAL INFORMATION

6 Months Ended

Mar. 28, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

UNAUDITED INTERIM FINANCIAL INFOMRATION

UNAUDITED INTERIM FINANCIAL INFORMATION

The financial information included herein is unaudited; however, the information reflects all adjustments (consisting of normal recurring adjustments) that are, in the opinion of management, necessary for a fair presentation of the Company’s financial position and results of operations and cash flows for the interim periods presented. These financial statements and notes should be read in conjunction with the financial statements and related notes for the year ended September 30, 2019 included in TD Group’s Form 10-K filed on November 19, 2019. As disclosed therein, the Company’s annual consolidated financial statements were prepared in conformity with generally accepted accounting principles in the United States (“US GAAP”). The September 30, 2019 condensed consolidated balance sheet was derived from TD Group’s audited financial statements. The results of operations for the twenty-six week period ended March 28, 2020 are not necessarily indicative of the results to be expected for the full year.

Historical information has been retrospectively adjusted to reflect the classification of discontinued operations. Discontinued operations are further described in Note 3, "Acquisitions and Divestitures," and Note 18, "Discontinued Operations."

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Cover Page Cover Page - shares	6 Months Ended
	Mar. 28, 2020	Apr. 27, 2020
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 28, 2020
Document Transition Report	false
Entity File Number	001-32833
Entity Registrant Name	TransDigm Group Incorporated
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	41-2101738
Entity Address, Address Line One	1301 East 9th Street,
Entity Address, Address Line Two	Suite 3000,
Entity Address, City or Town	Cleveland,
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	44114
City Area Code	216
Local Phone Number	706-2960
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	TDG
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		54,072,319
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001260221
Document Fiscal Year Focus	2020
Amendment Flag	false
Current Fiscal Year End Date	--09-30

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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Mar. 28, 2020	Dec. 28, 2019	Mar. 30, 2019	Dec. 29, 2018	Mar. 28, 2020	Mar. 30, 2019
Net income	$ 319		$ 202		$ 624	$ 398
Less: Net income attributable to noncontrolling interests	0		0		(1)	0
NET INCOME ATTRIBUTABLE TO TD GROUP	319	$ 304	202	$ 196	623	398
Other comprehensive (loss) income, net of tax:
Foreign currency translation	(106)	98	(13)	(11)	(8)	(24)
Unrealized loss on derivatives	(145)	23	(63)	$ (74)	(122)	(137)
Pensions and other postretirement benefits	0	$ 6	0		6	0
Other comprehensive loss, net of tax, attributable to TD Group	(251)		(76)		(124)	(161)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO TD GROUP	$ 68		$ 126		$ 499	$ 237

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SUPPLEMENTAL GUARANTOR INFORMATION - Supplemental Condensed Consolidating Cash Flow Statement (Details) - USD ($) $ in Millions	6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Condensed Cash Flow Statements, Captions [Line Items]
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$ 594	$ 453
Capital expenditures	(50)	(44)
Payments made in connection with acquisitions, net of cash acquired	0	(3,569)
Proceeds in connection with the sale of discontinued operations, net	904	0
Net cash provided by (used in) investing activities	854	(3,613)
Intercompany activities	0	0
Proceeds from exercise of stock options	69	47
Dividends and dividend equivalent payments	(1,928)	(24)
Repayments of Long-term Debt	(19)	(38)
Payments for Repurchase of Common Stock	(19)	0
Proceeds from Lines of Credit	200	0
Financing fees and other, net	(8)	(2)
Net cash provided by (used in) financing activities	(248)	3,915
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	1	1
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	1,201	756
Cash and Cash Equivalents, Period Increase (Decrease)		756
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	(1,467)	(2,073)
CASH AND CASH EQUIVALENTS, END OF PERIOD	(2,668)	(2,829)
Repayments of Other Long-term Debt	(1,168)	0
Redemption of senior subordinated notes due 2022, net	0	(550)
Proceeds from Issuance of Senior Long-term Debt	0	3,937
Proceeds from Issuance of Long-term Debt	2,625	0
Proceeds from 5.50% senior subordinated notes due 2027, net	0	545
Eliminations
Condensed Cash Flow Statements, Captions [Line Items]
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	1	9
Capital expenditures	0	0
Payments made in connection with acquisitions, net of cash acquired		0
Proceeds in connection with the sale of discontinued operations, net	0
Net cash provided by (used in) investing activities	0	0
Intercompany activities	(1)	(9)
Proceeds from exercise of stock options	0	0
Dividends and dividend equivalent payments	0	0
Repayments of Long-term Debt	0	0
Payments for Repurchase of Common Stock	0
Proceeds from Lines of Credit	0
Financing fees and other, net	0	0
Net cash provided by (used in) financing activities	(1)	(9)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	0
Cash and Cash Equivalents, Period Increase (Decrease)		0
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	0	0
CASH AND CASH EQUIVALENTS, END OF PERIOD	0	0
Repayments of Other Long-term Debt	0
Redemption of senior subordinated notes due 2022, net		0
Proceeds from Issuance of Senior Long-term Debt		0
Proceeds from Issuance of Long-term Debt	0
Proceeds from 5.50% senior subordinated notes due 2027, net		0
TransDigm Group
Condensed Cash Flow Statements, Captions [Line Items]
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	0	0
Capital expenditures	0	0
Payments made in connection with acquisitions, net of cash acquired		0
Proceeds in connection with the sale of discontinued operations, net	0
Net cash provided by (used in) investing activities	0	0
Intercompany activities	1,899	(23)
Proceeds from exercise of stock options	69	47
Dividends and dividend equivalent payments	(1,928)	(24)
Repayments of Long-term Debt	0	0
Payments for Repurchase of Common Stock	(19)
Proceeds from Lines of Credit	0
Financing fees and other, net	0	0
Net cash provided by (used in) financing activities	21	0
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	21
Cash and Cash Equivalents, Period Increase (Decrease)		0
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	0	0
CASH AND CASH EQUIVALENTS, END OF PERIOD	(21)	0
Repayments of Other Long-term Debt	0
Redemption of senior subordinated notes due 2022, net		0
Proceeds from Issuance of Senior Long-term Debt		0
Proceeds from Issuance of Long-term Debt	0
Proceeds from 5.50% senior subordinated notes due 2027, net		0
TransDigm Inc.
Condensed Cash Flow Statements, Captions [Line Items]
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	(348)	(64)
Capital expenditures	(2)	(2)
Payments made in connection with acquisitions, net of cash acquired		(3,538)
Proceeds in connection with the sale of discontinued operations, net	904
Net cash provided by (used in) investing activities	902	(3,540)
Intercompany activities	(1,031)	(701)
Proceeds from exercise of stock options	0	0
Dividends and dividend equivalent payments	0	0
Repayments of Long-term Debt	(19)	(38)
Payments for Repurchase of Common Stock	0
Proceeds from Lines of Credit	200
Financing fees and other, net	(8)	2
Net cash provided by (used in) financing activities	599	3,195
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	1,153
Cash and Cash Equivalents, Period Increase (Decrease)		(409)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	(1,092)	(1,821)
CASH AND CASH EQUIVALENTS, END OF PERIOD	2,245	(1,412)
Repayments of Other Long-term Debt	(1,168)
Redemption of senior subordinated notes due 2022, net		(550)
Proceeds from Issuance of Senior Long-term Debt		3,937
Proceeds from Issuance of Long-term Debt	2,625
Proceeds from 5.50% senior subordinated notes due 2027, net		545
TransDigm UK [Member]
Condensed Cash Flow Statements, Captions [Line Items]
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	1	4
Capital expenditures	0	0
Payments made in connection with acquisitions, net of cash acquired		0
Proceeds in connection with the sale of discontinued operations, net	0
Net cash provided by (used in) investing activities	0	0
Intercompany activities	0	(4)
Proceeds from exercise of stock options	0	0
Dividends and dividend equivalent payments	0	0
Repayments of Long-term Debt	0	0
Payments for Repurchase of Common Stock	0
Proceeds from Lines of Credit	0
Financing fees and other, net	0	0
Net cash provided by (used in) financing activities	0	(4)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	1
Cash and Cash Equivalents, Period Increase (Decrease)		0
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	0	0
CASH AND CASH EQUIVALENTS, END OF PERIOD	(1)	0
Repayments of Other Long-term Debt	0
Redemption of senior subordinated notes due 2022, net		0
Proceeds from Issuance of Senior Long-term Debt		0
Proceeds from Issuance of Long-term Debt	0
Proceeds from 5.50% senior subordinated notes due 2027, net		0
Subsidiary Guarantors
Condensed Cash Flow Statements, Captions [Line Items]
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	668	469
Capital expenditures	(37)	(36)
Payments made in connection with acquisitions, net of cash acquired		(31)
Proceeds in connection with the sale of discontinued operations, net	0
Net cash provided by (used in) investing activities	(37)	(67)
Intercompany activities	(634)	(407)
Proceeds from exercise of stock options	0	0
Dividends and dividend equivalent payments	0	0
Repayments of Long-term Debt	0	0
Payments for Repurchase of Common Stock	0
Proceeds from Lines of Credit	0
Financing fees and other, net	0	(2)
Net cash provided by (used in) financing activities	(634)	(409)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	0
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(3)
Cash and Cash Equivalents, Period Increase (Decrease)		(7)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	12	2
CASH AND CASH EQUIVALENTS, END OF PERIOD	15	9
Repayments of Other Long-term Debt	0
Redemption of senior subordinated notes due 2022, net		0
Proceeds from Issuance of Senior Long-term Debt		0
Proceeds from Issuance of Long-term Debt	0
Proceeds from 5.50% senior subordinated notes due 2027, net		0
Non- Guarantor Subsidiaries
Condensed Cash Flow Statements, Captions [Line Items]
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	272	35
Capital expenditures	(11)	(6)
Payments made in connection with acquisitions, net of cash acquired		0
Proceeds in connection with the sale of discontinued operations, net	0
Net cash provided by (used in) investing activities	(11)	(6)
Intercompany activities	(233)	1,144
Proceeds from exercise of stock options	0	0
Dividends and dividend equivalent payments	0	0
Repayments of Long-term Debt	0	0
Payments for Repurchase of Common Stock	0
Proceeds from Lines of Credit	0
Financing fees and other, net	0	(2)
Net cash provided by (used in) financing activities	(233)	1,142
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	1	1
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	29
Cash and Cash Equivalents, Period Increase (Decrease)		1,172
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	(387)	(254)
CASH AND CASH EQUIVALENTS, END OF PERIOD	(416)	(1,426)
Repayments of Other Long-term Debt	0
Redemption of senior subordinated notes due 2022, net		0
Proceeds from Issuance of Senior Long-term Debt		0
Proceeds from Issuance of Long-term Debt	$ 0
Proceeds from 5.50% senior subordinated notes due 2027, net		$ 0

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SUBSEQUENT EVENTS Subsequent Events (Details)	6 Months Ended
	Mar. 28, 2020
Subsequent Event [Line Items]
Labor, COVID-19 related RIF	15.00%

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LEASES Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Millions	Mar. 28, 2020	Oct. 01, 2019
Leases [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	6 years 2 months 12 days
Operating Lease, Right-of-Use Asset	$ 102	$ 99
Operating Lease, Liability, Current	21
Operating Lease, Liability, Noncurrent	86
Operating Lease, Liability	107	$ 105
Finance Lease, Right-of-Use Asset	71
Finance Lease, Liability, Current	2
Finance Lease, Liability, Noncurrent	56
Finance Lease, Liability	$ 58
Finance Lease, Weighted Average Remaining Lease Term	16 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	6.20%
Finance Lease, Weighted Average Discount Rate, Percent	7.20%

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DISCONTINUED OPERATIONS Schedule of Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019	Sep. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 1,443	$ 1,168	$ 2,908	$ 2,161
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(4)	2	68	2
Disposal Group, Including Discontinued Operation, Assets, Current	0		0		$ 962
Disposal Group, Including Discontinued Operation, Liabilities, Current	0		0		157
Souriau Sunbank [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations before gain or loss on disposal net of tax			8
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax			60
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(4)		68	1
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents					29
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net					67
Disposal Group, Including Discontinued Operation, Inventory					88
Disposal Group, Including Discontinued Operation, Prepaid and Other Assets					2
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment					101
Disposal Group, Including Discontinued Operation, Goodwill					480
Disposal Group, Including Discontinued Operation, Intangible Assets					194
Disposal Group, Including Discontinued Operation, Other Assets					1
Disposal Group, Including Discontinued Operation, Assets, Current					962
Disposal Group, Including Discontinued Operation, Accounts Payable					33
Disposal Group, Including Discontinued Operation, Accrued Liabilities					55
Disposal Group, including discontinued operations, Long-term Debt					6
Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities					42
Disposal Group, Including Discontinued Operation, Other Liabilities					21
Disposal Group, Including Discontinued Operation, Liabilities, Current					$ 157
Souriau Sunbank and EIT [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	0	28	79	28
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	0	3	13	3
Discontinued Operation, Tax Effect of Discontinued Operation	1	1	5	1
Income (loss) from discontinued operations before gain or loss on disposal net of tax	(1)	2	8	2
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	(3)	0	60	0
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	$ (4)	$ 2	$ 68	$ 2

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INCOME TAXES - Narratives (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019	Sep. 30, 2019
Effective income tax rate	4.20%	24.20%	11.60%	22.90%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Unrecognized tax benefits	$ 40.9		$ 40.9		$ 36.5
Tax rate effect	36.2		36.2		$ 31.4
Reduction in tax position in next 12 months	$ 1.5		$ 1.5
Minimum [Member]
Income Tax, Interest Disallowance Limitation			30.00%
Maximum [Member]
Income Tax, Interest Disallowance Limitation			50.00%

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INTANGIBLE ASSETS - Summary of changes in carrying value of Goodwill (Details) $ in Millions	6 Months Ended
	Mar. 28, 2020 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 7,820
Purchase price allocation adjustments	36
Currency translation adjustment	(10)
Balance at end of period	7,846
Power & Control
Goodwill [Roll Forward]
Balance at beginning of period	4,121
Purchase price allocation adjustments	(14)
Currency translation adjustment	4
Balance at end of period	4,111
Airframe
Goodwill [Roll Forward]
Balance at beginning of period	3,598
Purchase price allocation adjustments	51
Currency translation adjustment	(14)
Balance at end of period	3,635
Non- aviation
Goodwill [Roll Forward]
Balance at beginning of period	101
Purchase price allocation adjustments	(1)
Currency translation adjustment	0
Balance at end of period	$ 100

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INTANGIBLE ASSETS (Tables)

6 Months Ended

Mar. 28, 2020

Acquired Finite-Lived Intangible Assets [Line Items]

Schedule of Acquired Intangible Assets by Major Class [Table Text Block]

Intangible Assets Subject to Amortization

Other intangible assets - net in the condensed consolidated balance sheets consist of the following (in millions):

	March 28, 2020						September 30, 2019
	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Trademarks and trade names	$	954	$	—	$	954	$	956	$	—	$	956
Technology	1,829		542		1,287		1,806		496		1,310
Order backlog	90		65		25		107		45		62
Customer relationships	436		41		395		438		30		408
Other	18		10		8		17		9		8
Total	$	3,327	$	658	$	2,669	$	3,324	$	580	$	2,744

Summary of Changes in Carrying Value of Goodwill

The following is a summary of changes in the carrying value of goodwill by segment from September 30, 2019 through March 28, 2020 (in millions):

	Power & Control			Airframe			Non- aviation			Total
Balance at September 30, 2019	$	4,121		$	3,598		$	101		$	7,820
Purchase price allocation adjustments	(14		)	51			(1		)	36
Currency translation adjustments	4			(14		)	—			(10		)
Balance at March 28, 2020	$	4,111		$	3,635		$	100		$	7,846

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SEGMENTS (Tables)

6 Months Ended

Mar. 28, 2020

Segment Reporting [Abstract]

Net Sales by Reportable Segments

The following table presents net sales by reportable segment (in millions):

	Thirteen Week Periods Ended				Twenty-Six Week Periods Ended
	March 28, 2020		March 30, 2019		March 28, 2020		March 30, 2019
Net sales to external customers
Power & Control
Commercial OEM	$	191	$	146	$	375	$	278
Commercial Aftermarket	225		186		445		344
Defense	331		299		679		570
Total Power & Control	747		631		1,499		1,192
Airframe
Commercial OEM	243		176		473		308
Commercial Aftermarket	220		203		465		382
Defense	192		120		391		208
Total Airframe	655		499		1,329		898
Total Non-aviation	41		38		80		71
	$	1,443	$	1,168	$	2,908	$	2,161

EBITDA Defined by Segment to Consolidated Income Before Taxes

The following table reconciles EBITDA As Defined by segment to consolidated income from continuing operations before income taxes (in millions):

	Thirteen Week Periods Ended					Twenty-Six Week Periods Ended
	March 28, 2020			March 30, 2019		March 28, 2020		March 30, 2019
EBITDA As Defined
Power & Control	$	381		$	329	$	766	$	628
Airframe	296			243		602		434
Non-aviation	14			12		26		22
Total segment EBITDA As Defined	691			584		1,394		1,084
Less: Unallocated corporate expenses	16			18		38		31
Total Company EBITDA As Defined	675			566		1,356		1,053
Depreciation and amortization expense	72			39		141		74
Interest expense - net	252			202		501		374
Acquisition-related costs	9			38		16		50
Stock compensation expense	12			21		37		38
Refinancing costs	3			3		26		3
Other, net	(10		)	—		6		1
Income from continuing operations before income taxes	$	337		$	263	$	629	$	513

Total Assets by Segment

The following table presents total assets by segment (in millions):

	March 28, 2020		September 30, 2019
Total assets
Power & Control	$	7,114	$	7,037
Airframe	6,738		6,672
Non-aviation	259		262
Corporate	2,524		1,322
Assets of discontinued operations	—		962
	$	16,635	$	16,255

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INVENTORIES

6 Months Ended

Mar. 28, 2020

Inventory Disclosure [Abstract]

INVENTORIES

INVENTORIES

Inventories are stated at the lower of cost or net realizable value. Cost of inventories is generally determined by the average cost and the first-in, first-out (FIFO) methods and includes material, labor and overhead related to the manufacturing process.

Inventories consist of the following (in millions):

	March 28, 2020			September 30, 2019
Raw materials and purchased component parts	$	867		$	805
Work-in-progress	389			360
Finished goods	208			192
Total	1,464			1,357
Reserves for excess and obsolete inventory	(151		)	(124		)
Inventories - Net	$	1,313		$	1,233

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ACQUISITIONS AND DIVESTITURES

6 Months Ended

Mar. 28, 2020

Business Combinations [Abstract]

ACQUISITIONS

ACQUISITIONS AND DIVESTITURES

During the fiscal year ended September 30, 2019, the Company completed the acquisitions of Esterline Technologies Corporation ("Esterline") and substantially all of the assets and technical data rights of the Stormscope product line from L3Harris Technologies, Inc. ("Stormscope") and NavCom Defense Electronics ("NavCom"). The Company accounted for the acquisitions using the acquisition method and included the results of operations of the acquisitions in its condensed consolidated financial statements from the effective date of each acquisition.

The acquisitions strengthen and expand the Company’s position to design, produce and supply highly engineered proprietary aerospace components in niche markets with significant aftermarket content and provide opportunities to create value through the application of our three core value-driven operating strategies (obtaining profitable new business, improving our cost structure, and providing highly engineered value-added products to customers). The purchase price paid for each acquisition reflects the current earnings before interest, taxes, depreciation and amortization (EBITDA) and cash flows, as well as the future EBITDA and cash flows expected to be generated by the business, which are driven in most cases by the recurring aftermarket consumption over the life of a particular aircraft, estimated to be approximately 25 to 30 years.

Acquisitions

Esterline – On March 14, 2019, TransDigm completed the acquisition of all the outstanding stock of Esterline for $122.50 per share in cash, plus the payoff of Esterline debt. The purchase price, net of cash acquired of approximately $398.2 million, totaled approximately $3,923.9 million. Of the $3,923.9 million purchase price, $3,536.3 million was paid at closing and the remaining $387.6 million was classified as restricted cash for the redemption of the outstanding senior notes due 2023 (herein the "2023 Notes"). The 2023 Notes were redeemed on April 15, 2019. Esterline, through its subsidiaries, was an industry leader in specialized manufacturing for the aerospace and defense industry primarily within three core disciplines: advanced materials, avionics and controls and sensors and systems. The acquisition of Esterline expands TransDigm's platform of proprietary and sole source content for the aerospace and defense industry. TransDigm evaluated the strategic fit and description of each Esterline reporting unit to determine the appropriate business segment for the reporting unit. Each Esterline reporting unit is included in one of TransDigm's segments: Power and Control, Airframe, or Non-aviation. Refer to Note 13, "Segments," for additional information about the Company's segments.

The total purchase price of Esterline was allocated to the underlying assets acquired and liabilities assumed based upon the respective fair value at the date of acquisition. To the extent the purchase price exceeded the fair value of the net identifiable tangible and intangible assets acquired, such excess was allocated to goodwill. Allocations are based on the acquisition method of accounting and third-party valuation appraisals.

Except where otherwise noted in the notes to the condensed consolidated financial statements, changes in balances and activity where comparable periods are presented in the condensed consolidated financial statements were generally driven by the Esterline acquisition.

The allocation of the fair value of the assets acquired and liabilities assumed in the Esterline acquisition as of the acquisition date of March 14, 2019 is summarized in the table below (in millions).

Assets acquired:
Trade accounts receivable	$	384
Inventories	583
Prepaid expenses and other	423
Property, plant, and equipment	469
Other intangible assets	1,301
Goodwill	2,256
Other	20
Total assets acquired	5,436
Liabilities assumed:
Accounts payable	146
Accrued liabilities	751
Other non-current liabilities	615
Total liabilities assumed	1,512
Net assets acquired	$	3,924

Of the approximately $2.3 billion of goodwill recognized for the acquisition, approximately $25.6 million is deductible for tax purposes. Also, of the approximately $1.3 billion of other intangible assets recognized for the acquisition, approximately $48.9 million is deductible for tax purposes.

In connection with the Esterline acquisition, we acquired existing long-term contracts with customers that were incurring gross margin losses as of the date of acquisition. Based on our review of these contracts, we concluded that the terms of certain of these loss-making contracts were unfavorable when compared to market terms as of the acquisition date. As a result, we recognized loss contract reserves as of the acquisition date of $267.9 million based on the present value of the difference between the contractual cash flows of the existing long-term contracts and the estimated cash flows had the contracts been executed at market terms as of the acquisition date. These adjustments apply only to contracts generating a margin as of the date of acquisition. As of September 30, 2019, we reclassified $9.3 million in loss contract reserves to liabilities held-for-sale, as it pertained to Souriau-Sunbank. Significant assumptions used to determine the fair value of the loss contract reserves using the discounted cash flow model include discount rates, forecasted quantities of products to be sold under the long-term contracts and market prices for respective products. While the Company conservatively selected values for these assumptions, they are forward looking and could be affected by future economic and market conditions. The loss contract reserves are amortized and recorded as an offset to cost of sales over the life of the contracts as actual sales occur under the long-term contracts. Approximately $19.8 million was amortized and recorded as an offset to cost of sales in the condensed consolidated statement of income for the twenty-six week period ended March 28, 2020. Total loss contract reserves related to the Esterline acquisition are $211.1 million and $231.8 million at March 28, 2020 and September 30, 2019, respectively, of which $64.3 million and $60.0 million is classified in accrued liabilities and $146.8 million and $171.8 million is classified in other non-current liabilities in the condensed consolidated balance sheets at March 28, 2020 and September 30, 2019, respectively.

Extant Acquisitions – On August 30, 2019, the Company's Extant subsidiary completed the acquisition of substantially all of the assets and technical data rights of the Stormscope product line from L3Harris Technologies, Inc. for approximately $20 million in cash. Stormscope is a lightning detection system for the general aviation and business jet markets. Stormscope is included as a product line of Extant, which is included in TransDigm's Power and Control segment. The Company expects that approximately $11.1 million of goodwill recognized for the acquisition and approximately $7.5 million of other intangible assets recognized for the acquisition will be deductible for tax purposes over 15 years.

On October 1, 2018, the Company's Extant subsidiary completed the acquisition of substantially all of the assets and technical data rights from the Corona, California operations of NavCom for approximately $27 million in cash. NavCom develops, manufactures, and supports high-reliability, mission-critical electronics, avionics and sub-assemblies. NavCom is included as a product line of Extant, which is included in TransDigm's Power and Control segment. Approximately $9.0 million of goodwill recognized for the acquisition is deductible for tax purposes over 15 years.

Pro forma net sales and results of operations for the Extant acquisitions had they occurred at the beginning of the applicable twenty-six week periods ended March 28, 2020 and March 30, 2019 are not material and, accordingly, are not provided.

Divestitures

Souriau-Sunbank – On December 20, 2019, TransDigm completed the divestiture of the Souriau-Sunbank Connection Technologies business (“Souriau-Sunbank”) with Eaton Corporation plc (“Eaton”) for approximately $920 million. Souriau-Sunbank was acquired by TransDigm as part of its acquisition of Esterline in March 2019.

Esterline Interface Technology Group – On September 20, 2019, TransDigm completed the divestiture of its Esterline Interface Technology (“EIT”) group of businesses to an affiliate of KPS Capital Partners, LP for approximately $190 million, which included a working capital settlement of $0.7 million that was paid in February 2020. EIT was acquired by TransDigm as part of its acquisition of Esterline in March 2019.

Refer to Note 18, "Discontinued Operations," for further information on the Company's divestitures.

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FAIR VALUE MEASUREMENTS

6 Months Ended

Mar. 28, 2020

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

The following table presents our assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

The following summarizes the carrying amounts and fair values of financial instruments (in millions):

		March 28, 2020				September 30, 2019
	Level	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets:
Cash and cash equivalents	1	$	2,668	$	2,668	$	1,467	$	1,467
Interest rate cap agreements (1)	2	—		—		1		1
Liabilities:
Interest rate swap agreements (3)	2	38		38		13		13
Interest rate swap agreements (4)	2	329		329		202		202
Foreign currency forward exchange contracts and other (3)	2	10		10		6		6
Short-term borrowings - trade receivable securitization facility (5)	1	350		350		350		350
Long-term debt, including current portion:
Term loans (5)	2	7,427		6,158		7,449		7,478
Revolving credit facility (5)	2	200		200		—		—
6.00% 2022 Notes (5)	1	—		—		1,146		1,167
6.50% 2024 Notes (5)	1	1,195		1,110		1,194		1,239
6.50% 2025 Notes (5)	1	750		694		750		782
6.375% 2026 Notes (5)	1	944		884		943		999
6.875% 2026 Notes (5)	1	492		460		491		535
6.25% 2026 Notes (5)	1	3,947		3,980		3,942		4,290
7.50% 2027 Notes (5)	1	545		528		545		595
5.50% 2027 Notes (5)	1	2,627		2,385		—		—
Government Refundable Advances	2	27		27		39		39
Finance Lease Obligations	2	58		58		50		50

⁽¹⁾  Included in other non-current assets on the condensed consolidated balance sheets.

⁽²⁾  Included in prepaid expenses and other on the condensed consolidated balance sheets.

⁽³⁾  Included in accrued liabilities on the condensed consolidated balance sheets.

⁽⁴⁾  Included in other non-current liabilities on the condensed consolidated balance sheets.

⁽⁵⁾  The carrying amount of the debt instrument is presented net of debt issuance costs, premium and discount. Refer to Note 9, "Debt," for gross carrying amounts.

The Company values its financial instruments using an industry standard market approach, in which prices and other relevant information are generated by market transactions involving identical or comparable assets or liabilities. No financial instruments were recognized using unobservable inputs.

Interest rate swaps were measured at fair value using quoted market prices for the swap interest rate indexes over the term of the swap discounted to present value versus the fixed rate of the contract. The interest rate caps were measured at fair value using implied volatility rates of each individual caplet and the yield curve for the related periods.

The Company’s derivative contracts consist of foreign currency exchange contracts and, from time to time, interest rate swap and cap agreements. These derivative contracts are over-the-counter, and their fair value is determined using modeling techniques that include market inputs such as interest rates, yield curves, and currency exchange rates. These contracts are categorized as Level 2 in the fair value hierarchy.

The estimated fair value of the Company’s term loans was based on information provided by the agent under the Company’s senior secured credit facility. The estimated fair values of the Company’s notes were based upon quoted market prices. There has not been any impact to the fair value of derivative liabilities due to the Company's own credit risk. Similarly, there has not been any impact to the fair value of derivative assets based on the Company's evaluation of counterparties' credit risks.

The fair value of cash and cash equivalents, trade accounts receivable-net and accounts payable approximated book value due to the short-term nature of these instruments at March 28, 2020 and September 30, 2019.

XML

SUPPLEMENTAL GUARANTOR INFORMATION Narrative (Details)	Mar. 28, 2020
Condensed Financial Statements, Captions [Line Items]
Percentage of ownership in subsidiary	100.00%

XML

LEASES Supplemental Cash Flow Information Related To Leases (Details) $ in Thousands	6 Months Ended
	Mar. 28, 2020 USD ($)
Leases [Abstract]
Operating Lease, Payments	$ 14,000
Finance Lease, Principal Payments	2,000
Finance Lease, Interest Payment on Liability	1
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 15,000

XML

COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	Mar. 28, 2020 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Insurance deductible	$ 1

XML

SUPPLEMENTAL GUARANTOR INFORMATION - Supplemental Condensed Consolidating Income Statement (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Mar. 28, 2020	Dec. 28, 2019	Mar. 30, 2019	Dec. 29, 2018	Mar. 28, 2020	Mar. 30, 2019
Condensed Income Statements, Captions [Line Items]
Net Income	$ 319		$ 202		$ 624	$ 398
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0		0		(1)	0
NET SALES	1,443		1,168		2,908	2,161
COST OF SALES	625		518		1,288	947
GROSS PROFIT	818		650		1,620	1,214
SELLING AND ADMINISTRATIVE EXPENSES	180		160		381	282
AMORTIZATION OF INTANGIBLE ASSETS	46		22		86	42
INCOME (LOSS) FROM OPERATIONS	592		468		1,153	890
INTEREST EXPENSE - NET	252		202		501	374
REFINANCING COSTS	3		3		26	3
OTHER INCOME	0		0		(3)	0
EQUITY IN INCOME OF SUBSIDIARIES					0	0
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	337		263		629	513
INCOME TAX PROVISION	14		63		73	117
INCOME FROM CONTINUING OPERATIONS	323		200		556	396
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX	(4)		2		68	2
NET INCOME ATTRIBUTABLE TO TD GROUP	319	$ 304	202	$ 196	623	398
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX	(251)		(76)		(124)	(161)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO TD GROUP	68		$ 126		499	237
Eliminations
Condensed Income Statements, Captions [Line Items]
Net Income					(1,710)
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS					0	0
NET SALES					(115)	(60)
COST OF SALES					(115)	(60)
GROSS PROFIT					0	0
SELLING AND ADMINISTRATIVE EXPENSES					0	0
AMORTIZATION OF INTANGIBLE ASSETS					0	0
INCOME (LOSS) FROM OPERATIONS					0	0
INTEREST EXPENSE - NET					0	0
REFINANCING COSTS					0	0
OTHER INCOME					0
EQUITY IN INCOME OF SUBSIDIARIES					1,710	1,124
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES					(1,710)	(1,124)
INCOME TAX PROVISION					0	0
INCOME FROM CONTINUING OPERATIONS					(1,710)	(1,124)
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX					0	0
NET INCOME ATTRIBUTABLE TO TD GROUP					(1,710)	(1,124)
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX					87	210
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO TD GROUP					(1,623)	(914)
TransDigm Group
Condensed Income Statements, Captions [Line Items]
Net Income					623
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS					0	0
NET SALES					0	0
COST OF SALES					0	0
GROSS PROFIT					0	0
SELLING AND ADMINISTRATIVE EXPENSES					0	0
AMORTIZATION OF INTANGIBLE ASSETS					0	0
INCOME (LOSS) FROM OPERATIONS					0	0
INTEREST EXPENSE - NET					0	0
REFINANCING COSTS					0	0
OTHER INCOME					0
EQUITY IN INCOME OF SUBSIDIARIES					(623)	(398)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES					623	398
INCOME TAX PROVISION					0	0
INCOME FROM CONTINUING OPERATIONS	$ 323				623	398
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX					0	0
NET INCOME ATTRIBUTABLE TO TD GROUP					623	398
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX					(124)	(161)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO TD GROUP					499	237
TransDigm Inc.
Condensed Income Statements, Captions [Line Items]
Net Income					623
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS					0	0
NET SALES					84	88
COST OF SALES					46	66
GROSS PROFIT					38	22
SELLING AND ADMINISTRATIVE EXPENSES					91	101
AMORTIZATION OF INTANGIBLE ASSETS					0	2
INCOME (LOSS) FROM OPERATIONS					(53)	(81)
INTEREST EXPENSE - NET					504	378
REFINANCING COSTS					26	3
OTHER INCOME					(5)
EQUITY IN INCOME OF SUBSIDIARIES					(1,087)	(726)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES					509	264
INCOME TAX PROVISION					0	(134)
INCOME FROM CONTINUING OPERATIONS					509	398
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX					114	0
NET INCOME ATTRIBUTABLE TO TD GROUP					623	398
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX					(122)	(123)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO TD GROUP					501	275
TransDigm UK [Member]
Condensed Income Statements, Captions [Line Items]
Net Income					0
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS					0	0
NET SALES					0	0
COST OF SALES					0	0
GROSS PROFIT					0	0
SELLING AND ADMINISTRATIVE EXPENSES					0	0
AMORTIZATION OF INTANGIBLE ASSETS					0	0
INCOME (LOSS) FROM OPERATIONS					0	0
INTEREST EXPENSE - NET					18	9
REFINANCING COSTS					0	0
OTHER INCOME					(18)
EQUITY IN INCOME OF SUBSIDIARIES					0	0
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES					0	(9)
INCOME TAX PROVISION					0	0
INCOME FROM CONTINUING OPERATIONS					0	(9)
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX					0	0
NET INCOME ATTRIBUTABLE TO TD GROUP					0	(9)
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX					0	0
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO TD GROUP					0	(9)
Subsidiary Guarantors
Condensed Income Statements, Captions [Line Items]
Net Income					1,007
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS					0	0
NET SALES					2,249	1,755
COST OF SALES					953	724
GROSS PROFIT					1,296	1,031
SELLING AND ADMINISTRATIVE EXPENSES					193	147
AMORTIZATION OF INTANGIBLE ASSETS					60	35
INCOME (LOSS) FROM OPERATIONS					1,043	849
INTEREST EXPENSE - NET					(22)	(3)
REFINANCING COSTS					0	0
OTHER INCOME					4
EQUITY IN INCOME OF SUBSIDIARIES					0	0
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES					1,061	852
INCOME TAX PROVISION					54	234
INCOME FROM CONTINUING OPERATIONS					1,007	618
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX					0	0
NET INCOME ATTRIBUTABLE TO TD GROUP					1,007	618
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX					4	12
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO TD GROUP					1,011	630
Non- Guarantor Subsidiaries
Condensed Income Statements, Captions [Line Items]
Net Income					81
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS					(1)	0
NET SALES					690	378
COST OF SALES					404	217
GROSS PROFIT					286	161
SELLING AND ADMINISTRATIVE EXPENSES					97	34
AMORTIZATION OF INTANGIBLE ASSETS					26	5
INCOME (LOSS) FROM OPERATIONS					163	122
INTEREST EXPENSE - NET					1	(10)
REFINANCING COSTS					0	0
OTHER INCOME					16
EQUITY IN INCOME OF SUBSIDIARIES					0	0
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES					146	132
INCOME TAX PROVISION					19	17
INCOME FROM CONTINUING OPERATIONS					127	115
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX					(46)	2
NET INCOME ATTRIBUTABLE TO TD GROUP					80	117
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX					31	(99)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO TD GROUP					$ 111	$ 18

XML

FAIR VALUE MEASUREMENTS - Carrying Amounts and Fair Values of Financial Instruments (Detail) - USD ($) $ in Millions		Mar. 28, 2020	Sep. 30, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		$ 2,668	$ 1,467
Short-term borrowings—trade receivable securitization facility		350	350
Long-term Debt		18,212	16,549
Other Noncurrent Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate Cash Flow Hedge Asset at Carrying Value	[1]	0	1
Accrued Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign Currency Contract, Asset	[2]	10	6
Interest rate swap agreements	[2]	38	13
Other Noncurrent Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap agreements	[3]	329	202
Term loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	[4]	7,427	7,449
Government Refundable Advances [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt		27	39
Long-term debt, including current portion, Fair Value		27	39
Capital Lease Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt		58	50
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Fair Value		2,668	1,467
Level 2 | Other Noncurrent Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate cap agreements, Fair Value	[1]	0	1
Level 2 | Accrued Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign Currency Contract, Asset	[2]	10	6
Interest rate swap agreements, Fair Value	[2]	38	13
Level 2 | Other Noncurrent Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap agreements, Fair Value	[3]	329	202
Level 2 | Term loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion, Fair Value	[4]	6,158	7,478
Level 2 | Capital Lease Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion, Fair Value		58	50
6.00% senior subordinated notes due 2022 (2022 Notes) | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	[4]	0	1,146
6.00% senior subordinated notes due 2022 (2022 Notes) | Level 1 | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion, Fair Value	[4]	0	1,167
6.50% senior subordinated notes due 2024 (2024 Notes) | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	[4]	1,195	1,194
6.50% senior subordinated notes due 2024 (2024 Notes) | Level 1 | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion, Fair Value	[4]	1,110	1,239
6.50% senior subordinated notes due 2025 (2025 Notes) | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	[4]	750	750
6.50% senior subordinated notes due 2025 (2025 Notes) | Level 1 | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion, Fair Value	[4]	694	782
6.375% senior subordinated notes due 2026 (6.375% 2026 Notes) | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	[4]	944	943
6.375% senior subordinated notes due 2026 (6.375% 2026 Notes) | Level 1 | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion, Fair Value	[4]	884	999
6.875% senior subordinated noted due 2026 [Member] | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	[4]	492	491
6.875% senior subordinated noted due 2026 [Member] | Level 1 | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion, Fair Value	[4]	460	535
Senior Secured Notes $4B Due 2026 6.25% [Member] | Secured Debt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	[4]	3,947	3,942
Senior Secured Notes $4B Due 2026 6.25% [Member] | Level 1 | Secured Debt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion, Fair Value	[4]	3,980	4,290
Senior Subordinated Notes $550M Due 2027 7.50% [Member] | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	[4]	545	545
Long-term debt, including current portion, Fair Value	[4]		595
Senior Subordinated Notes $550M Due 2027 7.50% [Member] | Level 1 | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion, Fair Value	[4]	528
Senior Subordinated Notes $2650M Due 2027 5.50% [Member] | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	[4]	2,627	0
Long-term debt, including current portion, Fair Value	[4]		0
Senior Subordinated Notes $2650M Due 2027 5.50% [Member] | Level 1 | Senior Subordinated Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion, Fair Value	[4]	2,385
Asset-backed Securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings—trade receivable securitization facility	[4]	350	350
Asset-backed Securities | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings - trade receivable securitization facility, Fair Value	[4]	350	350
Revolving Credit Facility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	[4]	200	0
Revolving Credit Facility [Member] | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current portion, Fair Value	[4]	$ 200	$ 0

[1] Included in other non-current assets on the condensed consolidated balance sheets.

[2] Included in accrued liabilities on the condensed consolidated balance sheets.

[3] Included in other non-current liabilities on the condensed consolidated balance sheets.

[4] The carrying amount of the debt instrument is presented net of debt issuance costs, premium and discount. Refer to Note 9, "Debt," for gross carrying amounts.

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INTANGIBLE ASSETS - Narratives (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Aggregate Amortization of Intangible Assets			$ 86	$ 42
Amortization of intangible assets	$ 46	$ 22	86	$ 42
Estimated Amortization Expense, 2020	172		172
Estimated Amortization Expense, 2021	115		115
Estimated Amortization Expense, 2023	115		115
Estimated Amortization Expense, 2024	115		115
Estimated Amortization Expense, 2025	$ 115		$ 115

XML

INVENTORIES (Tables)

6 Months Ended

Mar. 28, 2020

Inventory Disclosure [Abstract]

Inventories

Inventories consist of the following (in millions):

	March 28, 2020			September 30, 2019
Raw materials and purchased component parts	$	867		$	805
Work-in-progress	389			360
Finished goods	208			192
Total	1,464			1,357
Reserves for excess and obsolete inventory	(151		)	(124		)
Inventories - Net	$	1,313		$	1,233

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DERIVATIVES AND HEDGING ACTIVITIES (Tables)

6 Months Ended

Mar. 28, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

he following table summarizes the Company's interest rate swap agreements:

Aggregate Notional Amount (in millions)	Start Date	End Date	Related Term Loans	Conversion of Related Variable Rate Debt to Fixed Rate of:
$750	3/31/2016	6/30/2020	Tranche E	5.05% (2.8% plus the 2.25% margin percentage)
$500	6/29/2018	3/31/2025	Tranche E	5.25% (3.0% plus the 2.25% margin percentage)
$750	6/30/2020	6/30/2022	Tranche E	4.75% (2.5% plus the 2.25% margin percentage)
$1,500	6/30/2022	3/31/2025	Tranche E	5.35% (3.1% plus the 2.25% margin percentage)
$1,000	6/28/2019	12/9/2025	Tranche F	4.05% (1.8% plus the 2.25% margin percentage)
$1,400	6/30/2021	12/9/2025	Tranche F	5.25% (3.0% plus the 2.25% margin percentage)
$500	12/30/2016	12/31/2021	Tranche G	4.15% (1.9% plus the 2.25% margin percentage)
$400	9/30/2017	9/30/2022	Tranche G	4.15% (1.9% plus the 2.25% margin percentage)
$900	12/31/2021	6/28/2024	Tranche G	5.35% (3.1% plus the 2.25% margin percentage)
$400	9/30/2022	6/28/2024	Tranche G	5.25% (3.0% plus the 2.25% margin percentage)

The following table summarizes the Company's interest rate cap agreements:

Aggregate Notional Amount (in millions)	Start Date	End Date	Related Term Loans	Offsets Variable Rate Debt Attributable to Fluctuations Above:
$750	9/30/2015	6/30/2020	Tranche E	Three month LIBO rate of 2.5%
$750	6/30/2020	6/30/2022	Tranche E	Three month LIBO rate of 2.5%
$400	6/30/2016	6/30/2021	Tranche F	Three month LIBO rate of 2.0%
$400	12/30/2016	12/31/2021	Tranche G	Three month LIBO rate of 2.5%

Schedule of Interest Rate Derivatives

	March 28, 2020					September 30, 2019
	Asset		Liability			Asset		Liability
Interest rate cap agreements	$	—	$	—		$	1	$	—
Interest rate swap agreements (1)	—		(367		)	—		(216		)
Net derivatives as classified in the balance sheet (2)	$	—	$	(367	)	$	1	$	(216	)

⁽¹⁾  The increase in the interest rate swap liability is primarily attributable to a downward trend in the LIBO rate during the second quarter of fiscal 2020.

⁽²⁾ 

Refer to Note 11, "Fair Value Measurements," for the condensed consolidated balance sheet classification of our interest rate swap and cap agreements.

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DERIVATIVES AND HEDGING ACTIVITIES

6 Months Ended

Mar. 28, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVES AND HEDGING ACTIVITIES

DERIVATIVES AND HEDGING ACTIVITIES

The Company is exposed to, among other things, the impact of changes in foreign currency exchange rates and interest rates in the normal course of business. The Company’s risk management program is designed to manage the exposure and volatility arising from these risks, and utilizes derivative financial instruments to offset a portion of these risks. The Company uses derivative financial instruments only to the extent necessary to hedge identified business risks and does not enter into such transactions for trading purposes. The Company generally does not require collateral or other security with counterparties to these financial instruments and is therefore subject to credit risk in the event of nonperformance; however, the Company monitors credit risk and currently does not anticipate nonperformance by other parties. These derivative financial instruments do not subject the Company to undue risk, as gains and losses on these instruments generally offset gains and losses on the underlying assets, liabilities, or anticipated transactions that are being hedged. The Company has agreements with each of its swap and cap counterparties that contain a provision whereby if the Company defaults on the credit facility the Company could also be declared in default on its swaps and caps, resulting in an acceleration of payment under the swaps and caps.

All derivative financial instruments are recorded at fair value in the condensed consolidated balance sheets. For a derivative that has not been designated as an accounting hedge, the change in the fair value is recognized immediately through earnings. For a derivative that has been designated as an accounting hedge of an existing asset or liability (a fair value hedge), the change in the fair value of both the derivative and underlying asset or liability is recognized immediately through earnings. For a derivative designated as an accounting hedge of an anticipated transaction (a cash flow hedge), the change in the fair value is recorded on the condensed consolidated balance sheet in accumulated other comprehensive income to the extent the derivative is effective in mitigating the exposure related to the anticipated transaction. The change in the fair value related to the ineffective portion of the hedge, if any, is immediately recognized in earnings. The amount recorded within accumulated other comprehensive income is reclassified into earnings in the same period during which the underlying hedged transaction affects earnings.

Interest Rate Swap and Cap Agreements – Interest rate swap and cap agreements are used to manage interest rate risk associated with floating-rate borrowings under our credit facility. The interest rate swap and cap agreements utilized by the Company effectively modify the Company’s exposure to interest rate risk by converting a portion of the Company’s floating-rate debt to a fixed rate basis through the expiration date of the interest rate swap and cap agreements, thereby reducing the impact of interest rate changes on future interest expense. These agreements involve the receipt of floating rate amounts in exchange for fixed rate interest payments over the term of the agreements without an exchange of the underlying principal amount. These derivative instruments qualify as effective cash flow hedges under US GAAP. For these cash flow hedges, the effective portion of the gain or loss from the financial instruments was initially reported as a component of accumulated other comprehensive income (loss) in stockholders’ deficit and subsequently reclassified into earnings in the same line as the hedged item in the same period or periods during which the hedged item affected earnings. As the interest rate swap and cap agreements are used to manage interest rate risk, any gains or losses from the derivative instruments that are reclassified into earnings are recognized in interest expense - net in the condensed consolidated statements of income.

The following table summarizes the Company's interest rate swap agreements:

Aggregate Notional Amount (in millions)	Start Date	End Date	Related Term Loans	Conversion of Related Variable Rate Debt to Fixed Rate of:
$750	3/31/2016	6/30/2020	Tranche E	5.05% (2.8% plus the 2.25% margin percentage)
$500	6/29/2018	3/31/2025	Tranche E	5.25% (3.0% plus the 2.25% margin percentage)
$750	6/30/2020	6/30/2022	Tranche E	4.75% (2.5% plus the 2.25% margin percentage)
$1,500	6/30/2022	3/31/2025	Tranche E	5.35% (3.1% plus the 2.25% margin percentage)
$1,000	6/28/2019	12/9/2025	Tranche F	4.05% (1.8% plus the 2.25% margin percentage)
$1,400	6/30/2021	12/9/2025	Tranche F	5.25% (3.0% plus the 2.25% margin percentage)
$500	12/30/2016	12/31/2021	Tranche G	4.15% (1.9% plus the 2.25% margin percentage)
$400	9/30/2017	9/30/2022	Tranche G	4.15% (1.9% plus the 2.25% margin percentage)
$900	12/31/2021	6/28/2024	Tranche G	5.35% (3.1% plus the 2.25% margin percentage)
$400	9/30/2022	6/28/2024	Tranche G	5.25% (3.0% plus the 2.25% margin percentage)

The following table summarizes the Company's interest rate cap agreements:

Aggregate Notional Amount (in millions)	Start Date	End Date	Related Term Loans	Offsets Variable Rate Debt Attributable to Fluctuations Above:
$750	9/30/2015	6/30/2020	Tranche E	Three month LIBO rate of 2.5%
$750	6/30/2020	6/30/2022	Tranche E	Three month LIBO rate of 2.5%
$400	6/30/2016	6/30/2021	Tranche F	Three month LIBO rate of 2.0%
$400	12/30/2016	12/31/2021	Tranche G	Three month LIBO rate of 2.5%

Certain derivative asset and liability balances are offset where master netting agreements provide for the legal right of setoff. For classification purposes, we record the net fair value of each type of derivative position that is expected to settle in less than one year with each counterparty as a net current asset or liability and each type of long-term position as a net non-current asset or liability. The amounts shown in the table below represent the gross amounts of recognized assets and liabilities, the amounts offset in the condensed consolidated balance sheet and the net amounts of assets and liabilities presented therein (in millions).

	March 28, 2020					September 30, 2019
	Asset		Liability			Asset		Liability
Interest rate cap agreements	$	—	$	—		$	1	$	—
Interest rate swap agreements (1)	—		(367		)	—		(216		)
Net derivatives as classified in the balance sheet (2)	$	—	$	(367	)	$	1	$	(216	)

⁽¹⁾  The increase in the interest rate swap liability is primarily attributable to a downward trend in the LIBO rate during the second quarter of fiscal 2020.

⁽²⁾  Refer to Note 11, "Fair Value Measurements," for the condensed consolidated balance sheet classification of our interest rate swap and cap agreements.

Based on the fair value amounts of the interest rate swap and cap agreements determined as of March 28, 2020, the estimated net amount of existing gains and losses and caplet amortization expected to be reclassified into interest expense within the next twelve months is approximately $39.4 million.

Foreign Currency Forward Exchange Contracts – The Company transacts business in various foreign currencies, which subjects the Company’s cash flows and earnings to exposure related to changes in foreign currency exchange rates. These exposures arise primarily from purchases or sales of products and services from third parties. Foreign currency forward exchange contracts provide for the purchase or sale of foreign currencies at specified future dates at specified exchange rates, and are used to offset changes in the fair value of certain assets or liabilities or forecasted cash flows resulting from transactions denominated in foreign currencies. At March 28, 2020, the Company had outstanding foreign currency forward exchange contracts principally to sell U.S. dollars with notional amounts of $145.9 million. These notional values consist primarily of contracts for the Canadian dollar and European euro and are stated in U.S. dollar equivalents at spot exchange rates at the respective dates. During the twenty-six week period ended March 28, 2020, the Company recognized gains on foreign currency forward exchange contracts designated as fair value hedges of $1.8 million in cost of sales in the condensed consolidated statement of income. During the twenty-six week period ended March 28, 2020, the gains the Company reclassified on foreign currency forward exchange contracts designated as cash flow hedges in the condensed consolidated income statement are immaterial. The gains (losses) were previously recorded as a component of accumulated other comprehensive income (loss) in stockholders' deficit.

During the twenty-six week period ended March 28, 2020, the Company recorded a gain of $0.3 million on foreign currency forward exchange contracts that have not been designated as accounting hedges. These foreign currency exchange gains are included in selling and administrative expenses.

There was an immaterial impact to the Company’s earnings related to the ineffective portion of any hedging instruments during the twenty-six week period ended March 28, 2020. In addition, there was an immaterial impact to the Company’s earnings when a hedged firm commitment no longer qualified as a fair value hedge or when a hedged forecasted transaction no longer qualified as a cash flow hedge during the twenty-six week period ended March 28, 2020.

Amounts related to foreign currency forward exchange contracts included in accumulated other comprehensive income (loss) in stockholders' deficit are reclassified into earnings when the hedged transaction settles. The Company expects to reclassify approximately $9.9 million of net losses into earnings over the next 12 months. The maximum duration of the Company’s foreign currency cash flow hedge contracts at March 28, 2020 is 12 months.

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INTANGIBLE ASSETS

6 Months Ended

Mar. 28, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

INTANGIBLE ASSETS

INTANGIBLE ASSETS

Other intangible assets - net in the condensed consolidated balance sheets consist of the following (in millions):

	March 28, 2020						September 30, 2019
	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Trademarks and trade names	$	954	$	—	$	954	$	956	$	—	$	956
Technology	1,829		542		1,287		1,806		496		1,310
Order backlog	90		65		25		107		45		62
Customer relationships	436		41		395		438		30		408
Other	18		10		8		17		9		8
Total	$	3,327	$	658	$	2,669	$	3,324	$	580	$	2,744

The aggregate amortization expense on identifiable intangible assets for the twenty-six week periods ended March 28, 2020 and March 30, 2019 was approximately $86 million and $42 million, respectively. The estimated amortization expense is $172 million for fiscal year 2020 and $115 million for each of the five succeeding fiscal years 2021 through 2025.

The following is a summary of changes in the carrying value of goodwill by segment from September 30, 2019 through March 28, 2020 (in millions):

	Power & Control			Airframe			Non- aviation			Total
Balance at September 30, 2019	$	4,121		$	3,598		$	101		$	7,820
Purchase price allocation adjustments	(14		)	51			(1		)	36
Currency translation adjustments	4			(14		)	—			(10		)
Balance at March 28, 2020	$	4,111		$	3,635		$	100		$	7,846

The purchase price allocation adjustments relate to opening balance sheet adjustments recorded by the sixteen reporting units acquired from Esterline.

Interim Impairment Evaluation

US GAAP requires that both indefinite-lived intangible assets and goodwill are tested for impairment annually and more frequently if events or changes in circumstances indicate that it is more likely than not (i.e., a likelihood greater than 50%) that the intangible asset or the reporting unit is impaired. Therefore, during interim periods, ASC 350 requires companies to focus on those events and circumstances that affect significant inputs used to determine the fair value of the asset, asset group or reporting unit to determine whether an interim quantitative impairment test is required. Given the adverse global economic and market conditions attributable to the novel strain of coronavirus (“COVID-19”) pandemic, particularly as it pertains to the commercial sector of the aerospace and defense industry, the Company determined that an interim impairment evaluation of goodwill and indefinite-lived intangible assets was necessary as of March 28, 2020 for certain reporting units in which it was concluded a potential impairment existed.

For the identified reporting units, a Step 1 impairment test was performed using an income approach based on management’s determination of the prospective financial information with consideration taken of the existing uncertainty in the global economy and aerospace and defense industry, particularly the commercial sector. Management also included projected declines and subsequent recovery in commercial OEM and aftermarket as a percentage of sales based on available industry data. The Company utilized a third party valuation firm to assist in the determination of the weighted average cost of capital. For each indefinite-lived intangible asset and reporting unit tested, the fair value sufficiently exceeded carrying value.

As a result of the interim impairment testing performed as of March 28, 2020, no indefinite-lived intangible assets or goodwill was determined to be impaired.

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RECENT ACCOUNTING PRONOUNCEMENTS

6 Months Ended

Mar. 28, 2020

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

RECENT ACCOUNTING PRONOUNCEMENTS

RECENT ACCOUNTING PRONOUNCEMENTS

In February 2016, the FASB issued ASU 2016-02, “Leases (ASC 842),” which requires lessees to recognize a right-of-use asset and lease liability for all leases with a term of more than 12 months. ASU 2016-02 was effective for the Company on October 1, 2019, and required a modified retrospective application. In July 2018, the FASB issued ASU 2018-11, “Leases (ASC 842) Targeted Improvements,” which provided an additional transition method that allowed entities to initially apply the new standard at the adoption date and recognize a cumulative effect adjustment to the opening balance of retained earnings in the period of adoption without restating prior periods. The Company has completed the necessary changes to the consolidated financial statements and related disclosures, internal controls, financial policies and information systems. On October 1, 2019, the Company adopted ASC 842 and related amendments using the modified retrospective method. Results for reporting periods beginning after October 1, 2019, are presented under ASC 842, while prior period amounts continue to be reported under ASC 840, “Leases." The Company elected to apply the package of practical expedients permitted within the new standard, which among other things, allows the carry forward of historical lease classification of existing leases. Additionally, the adoption of the new standard resulted in the recording of lease assets and lease liabilities for operating leases of $99 million and $105 million, respectively, as of October 1, 2019. The effects of our transition to ASC 842 resulted in no cumulative adjustment to retained earnings in the period of adoption. The adoption of the standard did not have a material impact on our condensed consolidated statements of income or cash flows. Refer to Note 16, "Leases," for additional information.

In June 2016, the FASB issued ASU 2016-13, "Financial Instruments—Credit Losses: Measurement of Credit Losses on Financial Instruments (ASU 2016-13)," which changes the impairment model for most financial assets. The new model uses a forward-looking expected loss method, which will generally result in earlier recognition of allowances for losses. ASU 2016-13 is effective for the Company for annual and interim periods beginning after October 1, 2020 and early adoption is permitted. The Company is currently evaluating the impact of adopting this standard on our consolidated financial statements and disclosures.

In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment,” to eliminate Step 2 from the goodwill impairment test in order to simplify the subsequent measurement of goodwill. The guidance is effective for the Company for fiscal years beginning after October 1, 2020, with early adoption permitted. The adoption of this standard is not expected to have a material impact on our consolidated financial statements and disclosures.

In December 2019, the FASB issued ASU 2019-12, “Income Taxes (ASC 740) - Simplifying the Accounting for Income Taxes,” which simplifies the accounting for income taxes by removing certain exceptions to the general principles in ASC 740. The amendments also improve consistent application of and simplify US GAAP for other areas of ASC 740 by clarifying and amending existing guidance. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption of the amendments is permitted, including adoption in any interim period for which financial statements have not yet been issued. Depending on the amendment, adoption may be applied on the retrospective, modified retrospective or prospective basis. The Company is currently evaluating the impact of adopting this standard on our consolidated financial statements and disclosures.

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SUBSEQUENT EVENTS

6 Months Ended

Mar. 28, 2020

Subsequent Event [Line Items]

Subsequent Events [Text Block]

SUBSEQUENT EVENTS

Response to COVID-19

In December 2019, COVID-19 surfaced in Wuhan, China, and has since spread to other countries, including the United States. In March 2020, the World Health Organization characterized COVID-19 as a pandemic. The pandemic has resulted in governments around the world implementing increasingly stringent measures to help control the spread of the virus, including quarantines, “shelter in place” and “stay at home” orders, travel restrictions, business curtailments and other measures. In addition, governments and central banks in several parts of the world have enacted fiscal and monetary stimulus measures to counteract the impacts of COVID-19. The airline industry, in particular, has been significantly disrupted, both domestically and internationally.

Beginning in the third quarter of fiscal 2020, as part of the Company’s response to the impact of the COVID-19 pandemic on its business, the Company is taking cost reduction measures such as: (1) reducing its workforce by up to 15% to align operations with customer demand. These actions are in addition to the cost mitigation efforts implemented earlier this calendar year in response to the 737 MAX production rate changes; (2) implementing one to eight-week unpaid furloughs at many businesses over approximately the next six months in response to business specific situations; (3) TransDigm’s senior management team will substantially reduce their cash compensation for the balance of fiscal 2020; (4) members of TransDigm's Board of Directors will forgo their annual retainer fees; and, (5) the Company has reassessed capital expenditure projects planned and are prioritizing only those projects that are deemed essential in the near term.

The Company continues to closely analyze its cost structure and may implement additional cost reduction measures as necessary due to the ongoing business challenges resulting from the COVID-19 pandemic.

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LEASES (Notes)

6 Months Ended

Mar. 28, 2020

Leases [Abstract]

LEASES

LEASES

The Company leases certain manufacturing facilities, offices, land, equipment and vehicles. Such leases, some of which are noncancelable and, in many cases, include renewals, expire at various dates. Such options to renew are included in the lease term when it is reasonably certain that the option will be exercised. The Company’s lease agreements typically do not contain any significant residual value guarantees or restrictive covenants, and payments within certain lease agreements are adjusted periodically for changes in an index or rate.

The Company determines if an arrangement is a lease at inception. Operating lease assets and liabilities are recognized at the commencement date of the lease based on the present value of lease payments over the lease term. Lease assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. The discount rate implicit within our leases is generally not determinable and therefore we determine the discount rate based on our incremental borrowing rate. The incremental borrowing rate for our leases is determined based on the lease term and the currency in which lease payments are made. The length of a lease term includes options to extend or terminate the lease when it is reasonably certain that the Company will exercise those options. The Company made an accounting policy election to not recognize lease assets or liabilities for leases with a term of 12 months or less. Additionally, when accounting for leases, the Company combines payments for leased assets, related services and other components of a lease.

The components of lease expense for the thirteen and twenty-six week periods ended March 28, 2020 are as follows (in millions):

	Classification	Thirteen Week Period Ended March 28, 2020		Twenty-Six Week Period Ended March 28, 2020
Operating lease cost	Cost of Sales or Selling and Administrative Expenses	$	7	$	14
Finance lease cost
Amortization of leased assets	Cost of Sales	1		1
Interest on lease liabilities	Interest Expense - Net	1		2
Total lease cost		$	9	$	17

Supplemental cash flow information related to leases for the twenty-six week period ended March 28, 2020 is as follows (in millions):

	March 28, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows from operating leases	$	14
Operating cash outflows from finance leases	2
Financing cash outflows from finance leases	1
Lease assets obtained in exchange for new lease obligations:
Operating leases	$	15

Supplemental balance sheet information related to leases is as follows (in millions):

	Classification	March 28, 2020
Operating Leases
Operating lease right-of-use assets	Other Assets	$	102
Current operating lease liabilities	Accrued Liabilities	21
Long-term operating lease liabilities	Other Non-current Liabilities	86
Total operating lease liabilities		$	107
Finance Leases
Finance lease right-of-use assets, net	Property, Plant and Equipment—Net	$	71
Current finance lease liabilities	Accrued Liabilities	2
Long-term finance lease liabilities	Other Non-current Liabilities	56
Total finance lease liabilities		$	58

As of March 28, 2020, the Company has the following remaining lease term and weighted average discount rates:

Weighted-average remaining lease term
Operating leases	6.2 years
Finance leases	16.8 years
Weighted-average discount rate
Operating leases	6.2%
Finance leases	7.2%

Maturities of lease liabilities at March 28, 2020 are as follows (in millions):

	Operating Leases		Finance Leases
2020	$	14	$	3
2021	26		6
2022	22		6
2023	17		6
2024	14		6
Thereafter	38		76
Total future minimum lease payments	131		103
Less: imputed interest	24		45
Present value of lease liabilities reported	$	107	$	58

A summary of minimum rental commitments at March 28, 2020 under noncancelable operating leases, which expire at various dates and in most cases contain renewal options, for each of the next five years and thereafter in the aggregate, is as follows (in millions):

	Operating Leases
2020	$	14
2021	26
2022	23
2023	18
2024	14
Thereafter	39
Total lease commitments	$	134

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LEASES Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 28, 2020	Mar. 28, 2020
Leases [Abstract]
Operating Lease, Cost	$ 7	$ 14
Finance Lease, Right-of-Use Asset, Amortization	1	1
Finance Lease, Interest Expense	1	2
Lease, Cost	$ 9	$ 17

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RETIREMENT BENEFITS Tables (Details) - Pension Plan [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
UNITED STATES
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Service Cost	$ 2	$ 1	$ 4	$ 2
Defined Benefit Plan, Interest Cost	3	2	5	4
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(5)	(3)	(9)	(5)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	1	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	0	0	0	0
Defined Benefit Plan, Amortization of Gain (Loss)	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	0	0	1	1
Foreign Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Service Cost	1	1	2	2
Defined Benefit Plan, Interest Cost	1	1	3	2
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1)	(1)	(4)	(3)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	0	0	0	0
Defined Benefit Plan, Amortization of Gain (Loss)	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 1	$ 1	$ 1	$ 1

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SEGMENTS - Narratives (Details)	6 Months Ended
	Mar. 28, 2020 Segment
Segment Reporting [Abstract]
Number of reporting segments	3

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Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
NET SALES	$ 1,443	$ 1,168	$ 2,908	$ 2,161
COST OF SALES	625	518	1,288	947
GROSS PROFIT	818	650	1,620	1,214
SELLING AND ADMINISTRATIVE EXPENSES	180	160	381	282
AMORTIZATION OF INTANGIBLE ASSETS	46	22	86	42
INCOME FROM OPERATIONS	592	468	1,153	890
INTEREST EXPENSE - NET	252	202	501	374
REFINANCING COSTS	3	3	26	3
OTHER INCOME	0	0	(3)	0
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	337	263	629	513
INCOME TAX PROVISION	14	63	73	117
INCOME FROM CONTINUING OPERATIONS	323	200	556	396
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX	(4)	2	68	2
Net Income	319	202	624	398
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0	(1)	0
NET INCOME ATTRIBUTABLE TO TD GROUP	319	202	623	398
NET INCOME APPLICABLE TO TD GROUP COMMON STOCKHOLDERS	$ 319	$ 202	$ 438	$ 374
Earnings per share attributable to TD Group common stockholders:
Earnings per share from continuing operations - basic and diluted	$ 5.63	$ 3.56	$ 6.45	$ 6.61
(Loss) Earnings per share from discontinued operations - basic and diluted	(0.07)	0.04	1.18	0.04
Earnings per share	5.56	3.60	7.63	6.65
Cash dividends declared per common share	$ 0	$ 0	$ 32.50	$ 0
Weighted-average shares outstanding:
Basic and diluted	57.4	56.3	57.4	56.3

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SUPPLEMENTAL GUARANTOR INFORMATION (Tables)

6 Months Ended

Mar. 28, 2020

Mar. 30, 2019

Condensed Financial Information Disclosure [Abstract]

Supplemental Condensed Consolidating Balance Sheet

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF MARCH 28, 2020

(Amounts in millions)

	TransDigm Group			TransDigm Inc.		TransDigm UK		Subsidiary Guarantors			Non- Guarantor Subsidiaries		Eliminations			Total Consolidated
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	21		$	2,245	$	1	$	(15	)	$	416	$	—		$	2,668
Trade accounts receivable - Net	—			—		—		147			852		—			999
Inventories - Net	—			56		—		936			338		(17		)	1,313
Prepaid expenses and other	—			92		—		63			65		—			220
Total current assets	21			2,393		1		1,131			1,671		(17		)	5,200
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	(4,230		)	17,962		974		19,222			9,680		(43,608		)	—
PROPERTY, PLANT AND  EQUIPMENT - NET	—			18		—		512			218		—			748
GOODWILL	—			83		—		6,413			1,350		—			7,846
OTHER INTANGIBLE ASSETS - NET	—			25		—		2,025			619		—			2,669
DEFERRED INCOME TAXES	—			—		—		—			13		—			13
OTHER	—			9		—		104			46		—			159
TOTAL ASSETS	$	(4,209	)	$	20,490	$	975	$	29,407		$	13,597	$	(43,625	)	$	16,635
LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY
CURRENT LIABILITIES:
Current portion of long-term debt	$	—		$	275	$	—	$	1		$	3	$	—		$	279
Short-term borrowings - trade receivable securitization facility	—			—		—		—			350		—			350
Accounts payable	—			17		—		151			98		—			266
Accrued liabilities	—			249		13		239			260		—			761
Total current liabilities	—			541		13		391			711		—			1,656
LONG-TERM DEBT	—			17,368		492		42			31		—			17,933
DEFERRED INCOME TAXES	—			—		—		289			96		—			385
OTHER NON-CURRENT LIABILITIES	—			434		—		268			164		—			866
Total liabilities	—			18,343		505		990			1,002		—			20,840
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	(4,209		)	2,147		470		28,417			12,591		(43,625		)	(4,209		)
NONCONTROLLING INTERESTS	—			—		—		—			4		—			4
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	$	(4,209	)	$	20,490	$	975	$	29,407		$	13,597	$	(43,625	)	$	16,635

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF MARCH 28, 2020

(Amounts in millions)

	TransDigm Group			TransDigm Inc.		TransDigm UK		Subsidiary Guarantors			Non- Guarantor Subsidiaries		Eliminations			Total Consolidated
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	21		$	2,245	$	1	$	(15	)	$	416	$	—		$	2,668
Trade accounts receivable - Net	—			—		—		147			852		—			999
Inventories - Net	—			56		—		936			338		(17		)	1,313
Prepaid expenses and other	—			92		—		63			65		—			220
Total current assets	21			2,393		1		1,131			1,671		(17		)	5,200
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	(4,230		)	17,962		974		19,222			9,680		(43,608		)	—
PROPERTY, PLANT AND  EQUIPMENT - NET	—			18		—		512			218		—			748
GOODWILL	—			83		—		6,413			1,350		—			7,846
OTHER INTANGIBLE ASSETS - NET	—			25		—		2,025			619		—			2,669
DEFERRED INCOME TAXES	—			—		—		—			13		—			13
OTHER	—			9		—		104			46		—			159
TOTAL ASSETS	$	(4,209	)	$	20,490	$	975	$	29,407		$	13,597	$	(43,625	)	$	16,635
LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY
CURRENT LIABILITIES:
Current portion of long-term debt	$	—		$	275	$	—	$	1		$	3	$	—		$	279
Short-term borrowings - trade receivable securitization facility	—			—		—		—			350		—			350
Accounts payable	—			17		—		151			98		—			266
Accrued liabilities	—			249		13		239			260		—			761
Total current liabilities	—			541		13		391			711		—			1,656
LONG-TERM DEBT	—			17,368		492		42			31		—			17,933
DEFERRED INCOME TAXES	—			—		—		289			96		—			385
OTHER NON-CURRENT LIABILITIES	—			434		—		268			164		—			866
Total liabilities	—			18,343		505		990			1,002		—			20,840
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	(4,209		)	2,147		470		28,417			12,591		(43,625		)	(4,209		)
NONCONTROLLING INTERESTS	—			—		—		—			4		—			4
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	$	(4,209	)	$	20,490	$	975	$	29,407		$	13,597	$	(43,625	)	$	16,635

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING BALANCE SHEET

AS OF SEPTEMBER 30, 2019

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK		Subsidiary Guarantors			Non- Guarantor Subsidiaries		Eliminations			Total Consolidated
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	—		$	1,092		$	—	$	(12	)	$	387	$	—		$	1,467
Trade accounts receivable - Net	—			—			—		172			896		—			1,068
Inventories - Net	—			52			—		880			316		(15		)	1,233
Assets held-for-sale	—			—			—		206			756		—			962
Prepaid expenses and other	—			27			—		45			63		—			135
Total current assets	—			1,171			—		1,291			2,418		(15		)	4,865
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	(2,894		)	14,729			975		16,373			6,898		(36,081		)	—
PROPERTY, PLANT AND EQUIPMENT - NET	—			17			—		513			227		—			757
GOODWILL	—			83			—		5,544			2,193		—			7,820
OTHER INTANGIBLE ASSETS - NET	—			25			—		2,064			655		—			2,744
OTHER	—			6			—		35			28		—			69
TOTAL ASSETS	$	(2,894	)	$	16,031		$	975	$	25,820		$	12,419	$	(36,096	)	$	16,255
LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY
CURRENT LIABILITIES:
Current portion of long-term debt	$	—		$	76		$	—	$	1		$	3	$	—		$	80
Short-term borrowings - trade receivable securitization facility	—			—			—		—			350		—			350
Accounts payable	—			17			—		160			99		—			276
Accrued liabilities	—			215			12		237			211		—			675
Liabilities held-for-sale	—			—			—		22			135		—			157
Total current liabilities	—			308			12		420			798		—			1,538
LONG-TERM DEBT	—			15,893			492		49			35		—			16,469
DEFERRED INCOME TAXES	—			—			—		347			94		—			441
OTHER NON-CURRENT LIABILITIES	—			315			—		233			143		—			691
Total liabilities	—			16,516			504		1,049			1,070		—			19,139
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	(2,894		)	(485		)	471		24,771			11,339		(36,096		)	(2,894		)
NONCONTROLLING INTERESTS	—			—			—		—			10		—			10
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	$	(2,894	)	$	16,031		$	975	$	25,820		$	12,419	$	(36,096	)	$	16,255

Supplemental Condensed Consolidating Income Statement

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF INCOME AND COMPREHENSIVE INCOME

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 28, 2020

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK			Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET SALES	$	—		$	84		$	—		$	2,249		$	690		$	(115	)	$	2,908
COST OF SALES	—			46			—			953			404			(115		)	1,288
GROSS PROFIT	—			38			—			1,296			286			—			1,620
SELLING AND ADMINISTRATIVE EXPENSES	—			91			—			193			97			—			381
AMORTIZATION OF INTANGIBLE ASSETS	—			—			—			60			26			—			86
INCOME (LOSS) FROM OPERATIONS	—			(53		)	—			1,043			163			—			1,153
INTEREST EXPENSE (INCOME)—NET	—			504			18			(22		)	1			—			501
REFINANCING COSTS	—			26			—			—			—			—			26
OTHER (INCOME) EXPENSE	—			(5		)	(18		)	4			16			—			(3		)
EQUITY IN INCOME OF SUBSIDIARIES	(623		)	(1,087		)	—			—			—			1,710			—
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	623			509			—			1,061			146			(1,710		)	629
INCOME TAX PROVISION	—			—			—			54			19			—			73
INCOME FROM CONTINUING OPERATIONS	623			509			—			1,007			127			(1,710		)	556
INCOME (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAX	—			114			—			—			(46		)	—			68
NET INCOME	623			623			—			1,007			81			(1,710		)	624
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			—			(1		)	—			(1		)
NET INCOME ATTRIBUTABLE TO TD GROUP	$	623		$	623		$	—		$	1,007		$	80		$	(1,710	)	$	623
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX	(124		)	(122		)	—			4			31			87			(124		)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO TD GROUP	$	499		$	501		$	—		$	1,011		$	111		$	(1,623	)	$	499

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF INCOME AND COMPREHENSIVE INCOME

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 28, 2020

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK			Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET SALES	$	—		$	84		$	—		$	2,249		$	690		$	(115	)	$	2,908
COST OF SALES	—			46			—			953			404			(115		)	1,288
GROSS PROFIT	—			38			—			1,296			286			—			1,620
SELLING AND ADMINISTRATIVE EXPENSES	—			91			—			193			97			—			381
AMORTIZATION OF INTANGIBLE ASSETS	—			—			—			60			26			—			86
INCOME (LOSS) FROM OPERATIONS	—			(53		)	—			1,043			163			—			1,153
INTEREST EXPENSE (INCOME)—NET	—			504			18			(22		)	1			—			501
REFINANCING COSTS	—			26			—			—			—			—			26
OTHER (INCOME) EXPENSE	—			(5		)	(18		)	4			16			—			(3		)
EQUITY IN INCOME OF SUBSIDIARIES	(623		)	(1,087		)	—			—			—			1,710			—
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	623			509			—			1,061			146			(1,710		)	629
INCOME TAX PROVISION	—			—			—			54			19			—			73
INCOME FROM CONTINUING OPERATIONS	623			509			—			1,007			127			(1,710		)	556
INCOME (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAX	—			114			—			—			(46		)	—			68
NET INCOME	623			623			—			1,007			81			(1,710		)	624
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			—			(1		)	—			(1		)
NET INCOME ATTRIBUTABLE TO TD GROUP	$	623		$	623		$	—		$	1,007		$	80		$	(1,710	)	$	623
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX	(124		)	(122		)	—			4			31			87			(124		)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO TD GROUP	$	499		$	501		$	—		$	1,011		$	111		$	(1,623	)	$	499

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF INCOME AND COMPREHENSIVE INCOME

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 30, 2019

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK			Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET SALES	$	—		$	88		$	—		$	1,755		$	378		$	(60	)	$	2,161
COST OF SALES	—			66			—			724			217			(60		)	947
GROSS PROFIT	—			22			—			1,031			161			—			1,214
SELLING AND ADMINISTRATIVE EXPENSES	—			101			—			147			34			—			282
AMORTIZATION OF INTANGIBLE ASSETS	—			2			—			35			5			—			42
(LOSS) INCOME FROM OPERATIONS	—			(81		)	—			849			122			—			890
INTEREST EXPENSE (INCOME)—NET	—			378			9			(3		)	(10		)	—			374
REFINANCING COSTS	—			3			—			—			—			—			3
EQUITY IN INCOME OF SUBSIDIARIES	(398		)	(726		)	—			—			—			1,124			—
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	398			264			(9		)	852			132			(1,124		)	513
INCOME TAX (BENEFIT) PROVISION	—			(134		)	—			234			17			—			117
INCOME (LOSS) FROM CONTINUING OPERATIONS	398			398			(9		)	618			115			(1,124		)	396
INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX	—			—			—			—			2			—			2
NET INCOME	398			398			(9		)	618			117			(1,124		)	398
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	—			—			—			—			—			—			—
NET INCOME (LOSS) ATTRIBUTABLE TO TD GROUP	$	398		$	398		$	(9	)	$	618		$	117		$	(1,124	)	$	398
OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX	(161		)	(123		)	—			12			(99		)	210			(161		)
TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TD GROUP	$	237		$	275		$	(9	)	$	630		$	18		$	(914	)	$	237

Supplemental Condensed Consolidating Cash Flow Statement

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 28, 2020

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK		Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	—		$	(348	)	$	1	$	668		$	272		$	1		$	594
INVESTING ACTIVITIES:
Capital expenditures	—			(2		)	—		(37		)	(11		)	—			(50		)
Proceeds in connection with sale of discontinued operations, net	—			904			—		—			—			—			904
Net cash provided by (used in) investing activities	—			902			—		(37		)	(11		)	—			854
FINANCING ACTIVITIES:
Intercompany activities	1,899			(1,031		)	—		(634		)	(233		)	(1		)	—
Proceeds from exercise of stock options	69			—			—		—			—			—			69
Dividends and dividend equivalent payments	(1,928		)	—			—		—			—			—			(1,928		)
Treasury stock purchased	(19		)	—			—		—			—			—			(19		)
Proceeds from revolving credit facility	—			200			—		—			—			—			200
Repayments on term loans	—			(19		)	—		—			—			—			(19		)
Redemption of senior subordinated notes due 2022, net	—			(1,168		)	—		—			—			—			(1,168		)
Proceeds from 5.50% senior subordinated notes due 2027, net	—			2,625			—		—			—			—			2,625
Financing fees and other, net	—			(8		)	—		—			—			—			(8		)
Net cash provided by (used in) financing activities	21			599			—		(634		)	(233		)	(1		)	(248		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	—			—			—		—			1			—			1
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	21			1,153			1		(3		)	29			—			1,201
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	—			1,092			—		(12		)	387			—			1,467
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	21		$	2,245		$	1	$	(15	)	$	416		$	—		$	2,668

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 28, 2020

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK		Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	—		$	(348	)	$	1	$	668		$	272		$	1		$	594
INVESTING ACTIVITIES:
Capital expenditures	—			(2		)	—		(37		)	(11		)	—			(50		)
Proceeds in connection with sale of discontinued operations, net	—			904			—		—			—			—			904
Net cash provided by (used in) investing activities	—			902			—		(37		)	(11		)	—			854
FINANCING ACTIVITIES:
Intercompany activities	1,899			(1,031		)	—		(634		)	(233		)	(1		)	—
Proceeds from exercise of stock options	69			—			—		—			—			—			69
Dividends and dividend equivalent payments	(1,928		)	—			—		—			—			—			(1,928		)
Treasury stock purchased	(19		)	—			—		—			—			—			(19		)
Proceeds from revolving credit facility	—			200			—		—			—			—			200
Repayments on term loans	—			(19		)	—		—			—			—			(19		)
Redemption of senior subordinated notes due 2022, net	—			(1,168		)	—		—			—			—			(1,168		)
Proceeds from 5.50% senior subordinated notes due 2027, net	—			2,625			—		—			—			—			2,625
Financing fees and other, net	—			(8		)	—		—			—			—			(8		)
Net cash provided by (used in) financing activities	21			599			—		(634		)	(233		)	(1		)	(248		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	—			—			—		—			1			—			1
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	21			1,153			1		(3		)	29			—			1,201
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	—			1,092			—		(12		)	387			—			1,467
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	21		$	2,245		$	1	$	(15	)	$	416		$	—		$	2,668

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS

FOR THE TWENTY-SIX WEEK PERIOD ENDED MARCH 30, 2019

(Amounts in millions)

	TransDigm Group			TransDigm Inc.			TransDigm UK			Subsidiary Guarantors			Non- Guarantor Subsidiaries			Eliminations			Total Consolidated
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$	—		$	(64	)	$	4		$	469		$	35		$	9		$	453
INVESTING ACTIVITIES:
Capital expenditures	—			(2		)	—			(36		)	(6		)	—			(44		)
Payments made in connection with acquisitions, net of cash acquired	—			(3,538		)	—			(31		)	—			—			(3,569		)
Net cash used in investing activities	—			(3,540		)	—			(67		)	(6		)	—			(3,613		)
FINANCING ACTIVITIES:
Intercompany activities	(23		)	(701		)	(4		)	(407		)	1,144			(9		)	—
Proceeds from exercise of stock options	47			—			—			—			—			—			47
Dividends and dividend equivalent payments	(24		)	—			—			—			—			—			(24		)
Repayment on term loans	—			(38		)	—			—			—			—			(38		)
Cash tender and redemption of senior subordinated notes due 2020	—			(550		)	—			—			—			—			(550		)
Proceeds from senior subordinated notes, net	—			545			—			—			—			—			545
Proceeds from senior secured notes due 2026, net	—			3,937			—			—			—			—			3,937
Financing fees and other, net	—			2			—			(2		)	(2		)	—			(2		)
Net cash provided by (used in) financing activities	—			3,195			(4		)	(409		)	1,142			(9		)	3,915
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	—			—			—			—			1			—			1
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	—			(409		)	—			(7		)	1,172			—			756
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	—			1,821			—			(2		)	254			—			2,073
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	—		$	1,412		$	—		$	(9	)	$	1,426		$	—		$	2,829

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DESCRIPTION OF THE BUSINESS

6 Months Ended

Mar. 28, 2020

Accounting Policies [Abstract]

DESCRIPTION OF THE BUSINESS

DESCRIPTION OF THE BUSINESS

Description of the Business – TransDigm Group Incorporated (“TD Group”), through its wholly-owned subsidiary, TransDigm Inc., is a leading global designer, producer and supplier of highly engineered aircraft components for use on nearly every commercial and military aircraft in service today. TransDigm Inc., along with TransDigm Inc.’s direct and indirect wholly-owned operating subsidiaries (collectively, with TD Group, the “Company” or “TransDigm”), offers a broad range of proprietary aerospace components. TD Group has no significant assets or operations other than its 100% ownership of TransDigm Inc. TD Group’s common stock is listed on the New York Stock Exchange, or the NYSE, under the trading symbol “TDG.”

TransDigm's major product offerings, substantially all of which are ultimately provided to end-users in the aerospace industry, include mechanical/electro-mechanical actuators and controls, ignition systems and engine technology, specialized pumps and valves, power conditioning devices, specialized AC/DC electric motors and generators, NiCad batteries and chargers, engineered latching and locking devices, rods and locking devices, engineered connectors and elastomers, databus and power controls, cockpit security components and systems, specialized cockpit displays, aircraft audio systems, specialized lavatory components, seat belts and safety restraints, engineered interior surfaces and related components, advanced sensor products, switches and relay panels, advanced displays, thermal protection and insulation, lighting and control technology, military personnel parachutes, high performance hoists, winches and lifting devices, and cargo loading, handling and delivery systems.

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RECENT ACCOUNTING PRONOUNCEMENTS - Narratives (Details) - USD ($) $ in Millions	Mar. 28, 2020	Oct. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Right-of-Use Asset	$ 102	$ 99
Operating Lease, Liability	$ 107	$ 105

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DEBT - Narratives (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Oct. 29, 2019	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019	Sep. 30, 2019	Feb. 01, 2019
Debt Instrument [Line Items]
Interest Payable, Current		$ 160.4		$ 160.4		$ 92.6
Gross Amount		18,388.0		18,388.0		16,713.0
Refinancing Costs		3.0	$ 3.0	26.0	$ 3.0
Senior Subordinated Notes | Senior Subordinated Notes $2650M Due 2027 5.50% [Member]
Debt Instrument [Line Items]
Gross Amount	$ 2,650.0	2,650.0		2,650.0
Interest rate	5.50%
Debt Issuance Costs, Gross		$ 23.6		23.6
Refinancing Costs				$ 1.1
Senior Subordinated Notes | 6.00% senior subordinated notes due 2022 (2022 Notes)
Debt Instrument [Line Items]
Gross Amount						$ 1,150.0
Interest rate		6.00%		6.00%		6.00%
Debt Instrument, Repurchased Face Amount	$ 1,150.0
Debt Instrument, Repurchase Amount	25.5
Write off of Deferred Debt Issuance Cost				$ 3.8
Early Redemption Premium	$ 17.3
Senior Subordinated Notes | 6.875% senior subordinated noted due 2026 [Member]
Debt Instrument [Line Items]
Gross Amount		$ 500.0		$ 500.0		$ 500.0
Interest rate		6.875%		6.875%		6.875%
Senior Subordinated Notes | Senior Subordinated Notes $550M Due 2027 7.50% [Member]
Debt Instrument [Line Items]
Gross Amount		$ 550.0		$ 550.0		$ 550.0
Interest rate		7.50%		7.50%
Senior Subordinated Notes | 5.50% senior subordinated notes due 2020 (2020 Notes)
Debt Instrument [Line Items]
Interest rate						5.50%
Term loans
Debt Instrument [Line Items]
Gross Amount		$ 7,503.0		$ 7,503.0		$ 7,524.0
Debt Instrument, Basis Spread on Variable Rate				2.25%
Term loans | Tranche E
Debt Instrument [Line Items]
Debt Instrument, Face Amount		2,216.0		$ 2,216.0
Term loans | Tranche F
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount		8.8		8.8
Debt Issuance Costs, Gross		1.6		1.6
Refinancing Costs				1.9
Debt Instrument, Face Amount		3,515.0		3,515.0
Term loans | Tranche G [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		1,774.0		1,774.0
Senior Notes | Senior Secured Notes $4B Due 2026 6.25% [Member]
Debt Instrument [Line Items]
Gross Amount		$ 4,000.0		$ 4,000.0		4,000.0	$ 4,000.0
Interest rate		6.25%		6.25%
Senior Notes | Senior Secured Notes $1.1B due 2025 8% [Member]
Debt Instrument [Line Items]
Gross Amount		$ 1,100.0		$ 1,100.0
Debt Instrument, Redemption Price, Percentage				100.00%
Interest rate	8.00%
Senior Notes | Senior Secured Notes $400M Due 2026 6.25% [Member]
Debt Instrument [Line Items]
Gross Amount		$ 400.0		$ 400.0
Debt Instrument, Redemption Price, Percentage				101.00%
Interest rate		6.25%		6.25%
Government Refundable Advances [Member]
Debt Instrument [Line Items]
Government refundable advances		$ 26.7		$ 26.7		39.2
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Capital Lease Obligations		57.5		57.5		$ 49.9
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		200.0		200.0
Letters of Credit Outstanding, Amount		41.7		41.7
Line of Credit Facility, Remaining Borrowing Capacity		$ 518.3		$ 518.3

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INTANGIBLE ASSETS - Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	Mar. 28, 2020	Sep. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 3,327	$ 3,324
Intangible Assets, Accumulated Amortization	658	580
Total	2,669	2,744
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,829	1,806
Accumulated Amortization	542	496
Net	1,287	1,310
Order backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	90	107
Accumulated Amortization	65	45
Net	25	62
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	436	438
Accumulated Amortization	41	30
Net	395	408
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	18	17
Accumulated Amortization	10	9
Net	8	8
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill), Gross	954	956
Indefinite-Lived Intangible Assets, Accumulated Amortization	0	0
Intangible Assets (Excluding Goodwill), Net	$ 954	$ 956

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DERIVATIVES AND HEDGING ACTIVITIES - Schedule of Interest Rate Derivatives (Details) - USD ($) $ in Millions		Mar. 28, 2020	Sep. 30, 2019
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	[1]	$ 0	$ 1
Derivative Asset, Fair Value, Gross Liability	[1]	(367)	(216)
Interest Rate Cap
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset		0	1
Derivative Asset, Fair Value, Gross Liability		0	0
Interest Rate Swap
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	[2]	0	0
Derivative Asset, Fair Value, Gross Liability	[2]	$ (367)	$ (216)

[1] Refer to Note 11, "Fair Value Measurements," for the condensed consolidated balance sheet classification of our interest rate swap and cap agreements.

[2] The increase in the interest rate swap liability is primarily attributable to a downward trend in the LIBO rate during the second quarter of fiscal 2020.

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LEASES Maturities of Lease Liabilities Operating and Financing (Details) - USD ($) $ in Millions	Mar. 28, 2020	Oct. 01, 2019
Leases [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 14
Capital Leases, Future Minimum Payments Due, Next Twelve Months	3
Operating Leases, Future Minimum Payments, Due in Two Years	26
Capital Leases, Future Minimum Payments Due in Two Years	6
Operating Leases, Future Minimum Payments, Due in Three Years	22
Capital Leases, Future Minimum Payments Due in Three Years	6
Operating Leases, Future Minimum Payments, Due in Four Years	17
Capital Leases, Future Minimum Payments Due in Four Years	6
Operating Leases, Future Minimum Payments, Due in Five Years	14
Capital Leases, Future Minimum Payments Due in Five Years	6
Operating Leases, Future Minimum Payments, Due Thereafter	38
Capital Leases, Future Minimum Payments Due Thereafter	76
Operating Leases, Future Minimum Payments Due	131
Capital Leases, Future Minimum Payments Due	103
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	24
Capital Leases, Future Minimum Payments, Interest Included in Payments	45
Operating Lease, Liability	107	$ 105
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments	$ 58

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DISCONTINUED OPERATIONS Narrative (Details) - USD ($) $ in Millions			3 Months Ended		6 Months Ended
	Dec. 20, 2019	Sep. 20, 2019	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019	Sep. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX			$ (4)	$ 2	$ 68	$ 2
Disposal Group, Including Discontinued Operation, Assets, Current			0		0		$ 962
Disposal Group, Including Discontinued Operation, Liabilities, Current			0		0		157
Souriau Sunbank [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax					60
Divestiture, Sale Price	$ 920
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX			$ (4)		68	1
Disposal Group, Including Discontinued Operation, Assets, Current							962
Disposal Group, Including Discontinued Operation, Liabilities, Current							$ 157
Income (loss) from discontinued operations before gain or loss on disposal net of tax					$ 8
Esterline Interface Technology Group [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Divestiture, Sale Price		$ 190
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX						$ 1

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INCOME TAXES

6 Months Ended

Mar. 28, 2020

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

At the end of each reporting period, TD Group makes an estimate of its annual effective income tax rate. The estimate used in the year-to-date period may change in subsequent periods. On March 27, 2020, the President of the United States signed the Coronavirus Aid, Relief, and Economic Security ("CARES") Act, a substantial tax-and-spending package intended to provide additional economic stimulus to address the impact of the COVID-19 pandemic. The CARES Act, among other things, includes provisions relating to refundable payroll tax credits, deferment of employer social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, and modifications to the net interest deduction limitations. The most significant impact of the CARES Act for the Company is an increase of the IRC 163(j) Interest Disallowance Limitations from 30% to 50% of adjusted taxable income which will allow the Company to deduct additional interest for fiscal years 2020 and 2021. During the thirteen week periods ended March 28, 2020 and March 30, 2019, the effective income tax rate was 4.2% and 24.2%, respectively. During the twenty-six week periods ended March 28, 2020 and March 30, 2019, the effective income tax rate was 11.6% and 22.9%, respectively. The Company's lower effective tax rate for the thirteen and twenty-six week periods ended March 28, 2020 was primarily due to a discrete benefit recognized for excess tax benefits for share-based payments in addition to the modification of the interest expense limitation under IRC Section 163(j) enacted as part of the CARES Act, effective for TD Group beginning October 1, 2019. The Company's effective tax rate for the thirteen and twenty-six week periods ended March 28, 2020 was lower than the Federal statutory rate of 21% primarily due to a discrete benefit recognized for excess tax benefits for share-based payments, partially offset by our foreign earnings taxed at rates higher than the U.S. statutory rate. The Company’s effective tax rate for the thirteen and twenty-six week periods ended March 30, 2019 was slightly higher than the Federal statutory tax rate primarily resulting from a valuation allowance associated with our net interest expense limitation under IRC Section 163(j), foreign earnings taxed at rates higher than the U.S. statutory rate, partially offset by the benefit associated with FDII and excess tax benefits for share-based payments.

The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction and various state, local and foreign jurisdictions. The Company is currently under examination for its federal income taxes in the U.S. for fiscal 2016, in Belgium for fiscal years 2016 through 2018, in Canada for fiscal years 2013 through 2015, in France for fiscal years 2015 through 2018, and in Germany for fiscal years 2014 through 2017. The Company is no longer subject to U.S. federal examinations for years before fiscal year 2015. The Company is subject to state income tax examinations for fiscal years 2009 and later.

At March 28, 2020 and September 30, 2019, TD Group had $40.9 million and $36.5 million, respectively, in unrecognized tax benefits, the recognition of which would have an effect of approximately $36.2 million and $31.4 million on the effective tax rate at March 28, 2020 and September 30, 2019, respectively. The Company believes the tax positions that comprise the unrecognized tax benefits will be reduced by approximately $1.5 million over the next 12 months. The Company recognizes accrued interest and penalties related to unrecognized tax benefits as a component of income tax expense.

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EARNINGS PER SHARE (TWO-CLASS METHOD)

6 Months Ended

Mar. 28, 2020

Earnings Per Share [Abstract]

EARNINGS PER SHARE (TWO-CLASS METHOD)

EARNINGS PER SHARE

The following table sets forth the computation of basic and diluted earnings per share (in millions, except per share data) using the two-class method:

	Thirteen Week Periods Ended					Twenty-Six Week Periods Ended
	March 28, 2020			March 30, 2019		March 28, 2020			March 30, 2019
Numerator for earnings per share:
Income from continuing operations	$	323		$	200	$	556		$	396
Less: Net income attributable to noncontrolling interests	—			—		(1		)	—
Net income from continuing operations attributable to TD Group	323			200		555			396
Less: Special dividends declared or paid on participating securities	—			—		(185		)	(24		)
	323			200		370			372
(Loss) income from discontinued operations, net of tax	(4		)	2		68			2
Net income applicable to TD Group common stockholders - basic and diluted	$	319		$	202	$	438		$	374
Denominator for basic and diluted earnings per share under the two-class method:
Weighted-average common shares outstanding	53.8			53.0		53.7			52.9
Vested options deemed participating securities	3.6			3.3		3.7			3.4
Total shares for basic and diluted earnings per share	57.4			56.3		57.4			56.3
Earnings per share from continuing operations - basic and diluted	$	5.63		$	3.56	$	6.45		$	6.61
(Loss) Earnings per share from discontinued operations - basic and diluted	(0.07		)	0.04		1.18			0.04
Earnings per share	$	5.56		$	3.60	$	7.63		$	6.65

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RETIREMENT BENEFITS (Tables)

6 Months Ended

Mar. 28, 2020

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

The components of net periodic pension cost for the Company's defined benefit plans were as follows (in millions):

	Thirteen Week Periods Ended												Twenty-Six Week Periods Ended
	March 28, 2020						March 30, 2019						March 28, 2020						March 30, 2019
	U.S. Pension Plans			Non-U.S. Pension Plans			U.S. Pension Plans			Non-U.S. Pension Plans			U.S. Pension Plans			Non-U.S. Pension Plans			U.S. Pension Plans			Non-U.S. Pension Plans
Service cost	$	2		$	1		$	1		$	1		$	4		$	2		$	2		$	2
Interest cost	3			1			2			1			5			3			4			2
Expected return on plan assets	(5		)	(1		)	(3		)	(1		)	(9		)	(4		)	(5		)	(3		)
Amortization of prior service cost	—			—			—			—			—			—			—			—
Amortization of actuarial loss	—			—			—			—			1			—			—			—
Amortization of transition obligation	—			—			—			—			—			—			—			—
Net periodic pension cost	$	—		$	1		$	—		$	1		$	1		$	1		$	1		$	1

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REVENUE Contract Assets and Liabilities (Tables)

6 Months Ended

Mar. 28, 2020

Schedule of Contract Assets and Liabilities [Line Items]

Contract with Customer, Asset and Liability [Table Text Block]

The following table summarizes our contract assets and liabilities balances (in millions):

	March 28, 2020		September 30, 2019		Change
Contract assets, current (1)	$	40	$	44	$	(4	)
Contract assets, non-current (2)	6		7		(1		)
Total contract assets	46		51		(5		)
Contract liabilities, current (3)	21		18		3
Contract liabilities, non-current (4)	15		13		2
Total contract liabilities	36		31		5
Net contract assets	$	10	$	20	$	(10	)

⁽¹⁾  Included in prepaid expenses and other on the condensed consolidated balance sheets.

⁽²⁾  Included in other non-current assets on the condensed consolidated balance sheets.

⁽³⁾  Included in accrued liabilities on the condensed consolidated balance sheets.

⁽⁴⁾ 

Included in other non-current liabilities on the condensed consolidated balance sheets.

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DEBT (Tables)

6 Months Ended

Mar. 28, 2020

Debt Disclosure [Abstract]

Schedule of Debt

The Company’s debt consists of the following (in millions):

	March 28, 2020
	Gross Amount		Debt Issuance Costs			Original Issue Discount or Premium			Net Amount
Short-term borrowings—trade receivable securitization facility	$	350	$	—		$	—		$	350
Term loans	$	7,503	$	(52	)	$	(24	)	$	7,427
Revolving credit facility	200		—			—			200
6.50% senior subordinated notes due 2024 (2024 Notes)	1,200		(5		)	—			1,195
6.50% senior subordinated notes due 2025 (2025 Notes)	750		(3		)	3			750
6.375% senior subordinated notes due 2026 (6.375% 2026 Notes)	950		(6		)	—			944
6.875% senior subordinated notes due 2026 (6.875% 2026 Notes)	500		(5		)	(3		)	492
6.25% secured notes due 2026 (2026 Secured Notes)	4,000		(55		)	2			3,947
7.50% senior subordinated notes due 2027 (7.50% 2027 Notes)	550		(5		)	—			545
5.50% senior subordinated notes due 2027 (5.50% 2027 Notes	2,650		(23		)	—			2,627
Government refundable advances	27		—			—			27
Finance lease obligations	58		—			—			58
	18,388		(154		)	(22		)	18,212
Less current portion	280		(1		)	—			279
Long-term debt	$	18,108	$	(153	)	$	(22	)	$	17,933

	September 30, 2019
	Gross Amount		Debt Issuance Costs			Original Issue Discount or Premium			Net Amount
Short-term borrowings—trade receivable securitization facility	$	350	$	—		$	—		$	350
Term loans	$	7,524	$	(58	)	$	(17	)	$	7,449
6.00% 2022 Notes	1,150		(4		)	—			1,146
6.50% 2024 Notes	1,200		(6		)	—			1,194
6.50% 2025 Notes	750		(3		)	3			750
6.375% 2026 Notes	950		(7		)	—			943
6.875% 2026 Notes	500		(6		)	(3		)	491
6.25% 2026 Secured Notes	4,000		(60		)	2			3,942
7.50% 2027 Notes	550		(5		)	—			545
Government refundable advances	39		—			—			39
Finance lease obligations	50		—			—			50
	16,713		(149		)	(15		)	16,549
Less current portion	81		(1		)	—			80
Long-term debt	$	16,632	$	(148	)	$	(15	)	$	16,469

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DISCONTINUED OPERATIONS

6 Months Ended

Mar. 28, 2020

DISCONTINUED OPERATIONS [Abstract]

Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]

DISCONTINUED OPERATIONS

Current Year Divestitures

On December 20, 2019, TransDigm completed the divestiture of the Souriau-Sunbank Connection Technologies business (“Souriau-Sunbank”) with Eaton Corporation plc (“Eaton”) for approximately $920 million. Souriau-Sunbank was acquired by TransDigm as part of its acquisition of Esterline in March 2019 and was included in TransDigm’s Non-aviation segment. The divestiture represented a strategic shift in TransDigm’s business and, in accordance with US GAAP, qualified as discontinued operations.

(Loss) income from discontinued operations, net of tax in the condensed consolidated statements of income for the thirteen and twenty-six week periods ended March 28, 2020 was $(4) million and $68 million, respectively. The $68 million income from discontinued operations, net of tax for the twenty-six week period ended March 28, 2020 was comprised of $8 million income from Souriau-Sunbank's operations and a gain on the sale of Souriau-Sunbank, net of tax, of $60 million. Income from discontinued operations, net of tax was $1 million for the thirteen and twenty-six week periods ended March 30, 2019.

At September 30, 2019, Souriau-Sunbank’s assets held-for-sale and liabilities held-for-sale were $962 million and $157 million, respectively. Under US GAAP, assets held for sale are to be reported at lower of its carrying amount or fair value less cost to sell. The following is the summarized balance sheet of Souriau-Sunbank’s assets held-for-sale and liabilities held-for-sale as of September 30, 2019 (in millions):

Assets and Liabilities of Discontinued Operations Held-for-Sale	Fiscal Year Ended September 30, 2019
Cash and cash equivalents	$	29
Trade accounts receivable—Net	67
Inventories—Net	88
Prepaid expenses and other	2
Property, plant and equipment—Net	101
Goodwill	480
Other intangibles—Net	194
Other	1
Total assets of discontinued operations	$	962
Accounts payable	$	33
Accrued liabilities	55
Long-term debt	6
Deferred income taxes	42
Other	21
Total liabilities of discontinued operations	$	157

Prior Year Divestitures

On September 20, 2019, TransDigm completed the divestiture of its Esterline Interface Technology (“EIT”) group of businesses to an affiliate of KPS Capital Partners, LP for approximately $190 million. EIT was acquired by TransDigm as part of its acquisition of Esterline in March 2019 and was included in TransDigm’s Non-aviation segment. The divestiture represented a strategic shift in TransDigm’s business and, in accordance with US GAAP, qualified as discontinued operations.

There was no impact to the (loss) income from discontinued operations, net of tax in the condensed consolidated statements of income for the thirteen and twenty-six week periods ended March 28, 2020. Income from discontinued operations, net of tax was $1 million for the thirteen and twenty-six week periods ended March 30, 2019.

Operating Results Summary

The following is the summarized operating results for Souriau-Sunbank for the thirteen and twenty-six week periods ended March 28, 2020 and March 30, 2019 and EIT for the thirteen and twenty-six week periods ended March 30, 2019 (in millions):

	Thirteen Week Period Ended					Twenty-Six Week Period Ended
	March 28, 2020			March 30, 2019		March 28, 2020		March 30, 2019
Net sales	$	—		$	28	$	79	$	28
Income from discontinued operations before income taxes	—			3		13		3
Income tax expense	1			1		5		1
(Loss) Income from discontinued operations, net of tax	(1		)	2		8		2
(Loss) Gain from sale of discontinued operations, net of tax	(3		)	—		60		—
(Loss) Income from discontinued operations, net of tax	$	(4	)	$	2	$	68	$	2

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RETIREMENT BENEFITS (Notes)

6 Months Ended

Mar. 28, 2020

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Pension and Other Postretirement Benefits Disclosure [Text Block]

RETIREMENT PLANS

The components of net periodic pension cost for the Company's defined benefit plans were as follows (in millions):

	Thirteen Week Periods Ended												Twenty-Six Week Periods Ended
	March 28, 2020						March 30, 2019						March 28, 2020						March 30, 2019
	U.S. Pension Plans			Non-U.S. Pension Plans			U.S. Pension Plans			Non-U.S. Pension Plans			U.S. Pension Plans			Non-U.S. Pension Plans			U.S. Pension Plans			Non-U.S. Pension Plans
Service cost	$	2		$	1		$	1		$	1		$	4		$	2		$	2		$	2
Interest cost	3			1			2			1			5			3			4			2
Expected return on plan assets	(5		)	(1		)	(3		)	(1		)	(9		)	(4		)	(5		)	(3		)
Amortization of prior service cost	—			—			—			—			—			—			—			—
Amortization of actuarial loss	—			—			—			—			1			—			—			—
Amortization of transition obligation	—			—			—			—			—			—			—			—
Net periodic pension cost	$	—		$	1		$	—		$	1		$	1		$	1		$	1		$	1

The net periodic pension cost for the Company's post-retirement pension plans was immaterial for the thirteen and twenty-six week periods ended March 28, 2020 and March 30, 2019. The defined benefit plan components of total pension cost, other than service cost, are included in other expense in the Company's condensed consolidated statements of income.

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ACQUISITIONS AND DIVESTITURES (Tables)

6 Months Ended

Mar. 28, 2020

Esterline [Member]

Business Acquisition [Line Items]

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

The allocation of the fair value of the assets acquired and liabilities assumed in the Esterline acquisition as of the acquisition date of March 14, 2019 is summarized in the table below (in millions).

Assets acquired:
Trade accounts receivable	$	384
Inventories	583
Prepaid expenses and other	423
Property, plant, and equipment	469
Other intangible assets	1,301
Goodwill	2,256
Other	20
Total assets acquired	5,436
Liabilities assumed:
Accounts payable	146
Accrued liabilities	751
Other non-current liabilities	615
Total liabilities assumed	1,512
Net assets acquired	$	3,924

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Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 28, 2020	Sep. 30, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 2,668	$ 1,467
Trade accounts receivable—Net	999	1,068
Inventories—Net	1,313	1,233
Assets held-for-sale	0	962
Prepaid expenses and other	220	135
Total current assets	5,200	4,865
PROPERTY, PLANT AND EQUIPMENT—NET	748	757
GOODWILL	7,846	7,820
OTHER INTANGIBLE ASSETS—NET	2,669	2,744
DEFERRED INCOME TAXES	13	0
OTHER	159	69
TOTAL ASSETS	16,635	16,255
CURRENT LIABILITIES:
Current portion of long-term debt	279	80
Short-term borrowings—trade receivable securitization facility	350	350
Accounts payable	266	276
Accrued liabilities	761	675
Liabilities held-for-sale	0	157
Total current liabilities	1,656	1,538
LONG-TERM DEBT	17,933	16,469
Deferred Tax Liabilities, Gross	385	441
OTHER NON-CURRENT LIABILITIES	866	691
Total liabilities	20,840	19,139
TD GROUP STOCKHOLDERS’ DEFICIT:
Common stock - $.01 par value; authorized 224,400,000 shares; issued 58,233,574 and 57,623,311 at March 28, 2020 and September 30, 2019, respectively	1	1
Additional paid-in capital	1,488	1,379
Accumulated deficit	(4,401)	(3,120)
Accumulated other comprehensive loss	(503)	(379)
Treasury stock, at cost; 4,198,226 and 4,161,326 shares at March 28, 2020 and September 30, 2019, respectively	(794)	(775)
Total TD Group stockholders’ deficit	(4,209)	(2,894)
NONCONTROLLING INTERESTS	4	10
Total stockholders' deficit	(4,205)	(2,884)
TOTAL LIABILITIES AND STOCKHOLDERS’ DEFICIT	$ 16,635	$ 16,255

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REVENUE Tables (Details) - USD ($) $ in Millions		6 Months Ended
		Mar. 28, 2020	Sep. 30, 2019
Contract with Customer, Asset, Net, Current	[1]	$ 40	$ 44
Contract with Customer, Asset, Current, Increase or Decrease	[1]	(4)
Inventories—Net		1,313	1,233
Accumulated deficit		(4,401)	(3,120)
Contract with Customer, Asset, Net, Noncurrent	[2]	6	7
Contract with customer, Asset, Non-current, Increase or Decrease	[2]	(1)
Contract with Customer, Asset, after Allowance for Credit Loss		46	51
Contract assets, Increase or Decrease		(5)
Contract with Customer, Liability, Current	[3]	21	18
Contract liabilities, Current, Increase or Decrease	[3]	3
Contract with Customer, Liability, Noncurrent	[4]	15	13
Contract liabilities, Non-current, Increase or Decrease	[4]	2
Contract with Customer, Liability		36	31
Contract Liabilities, Increase or Decrease		5
Net Contract Asset		10	$ 20
Net Contract Asset, Increase or Decrease		$ (10)

[1] Included in prepaid expenses and other on the condensed consolidated balance sheets.

[2] Included in other non-current assets on the condensed consolidated balance sheets.

[3] Included in accrued liabilities on the condensed consolidated balance sheets.

[4] Included in other non-current liabilities on the condensed consolidated balance sheets.

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Condensed Consolidated Statement of Changes in Stockholders' Deficit - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interest
NONCONTROLLING INTERESTS							$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders' deficit	$ (1,808)
BALANCE (in shares) at Sep. 30, 2018		56,895,686
BALANCE (in shares) at Sep. 30, 2018						(4,161,326)
BALANCE at Sep. 30, 2018		$ 1	$ 1,209	$ (2,247)	$ 4	$ (775)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividend Equivalent Payments On Certain Stock Options	(3)			(3)
Cumulative Effect on Retained Earnings, Net of Tax	3
Cumulative Effect on Retained Earnings, Net of Tax | ASC 606 and ASU 2016-06				3
Compensation expense recognized for employee stock options	16		16
Exercise of employee stock options		109,695
Exercise of employee stock options	14		14
Net income attributable to TD Group	(196)			196
Foreign currency translation adjustments, net of tax	(11)				(11)
Unrealized (loss) gain on derivatives, net of tax	(74)				(74)
BALANCE (in shares) at Dec. 29, 2018		57,005,381
BALANCE (in shares) at Dec. 29, 2018						(4,161,326)
BALANCE at Dec. 29, 2018		$ 1	1,239	(2,051)	(81)	$ (775)
BALANCE (in shares) at Sep. 30, 2018		56,895,686
BALANCE (in shares) at Sep. 30, 2018						(4,161,326)
BALANCE at Sep. 30, 2018		$ 1	1,209	(2,247)	4	$ (775)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to TD Group	(398)
Foreign currency translation adjustments, net of tax	(24)
Unrealized (loss) gain on derivatives, net of tax	(137)
Pensions and other postretirement benefit adjustments, net of tax	0
BALANCE (in shares) at Mar. 30, 2019		57,304,097
BALANCE (in shares) at Mar. 30, 2019						(4,161,326)
BALANCE at Mar. 30, 2019		$ 1	1,291	(1,851)	(157)	$ (775)
NONCONTROLLING INTERESTS							0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders' deficit	(1,667)
BALANCE (in shares) at Dec. 29, 2018		57,005,381
BALANCE (in shares) at Dec. 29, 2018						(4,161,326)
BALANCE at Dec. 29, 2018		$ 1	1,239	(2,051)	(81)	$ (775)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividend Equivalent Payments On Certain Stock Options	(2)			(2)
Acquisition of business	(9)						9
Compensation expense recognized for employee stock options	19		19
Exercise of employee stock options		298,240
Exercise of employee stock options	$ 33		33
Stock Issued During Period, Shares, New Issues	0	476
Net income attributable to TD Group	$ (202)			202
Foreign currency translation adjustments, net of tax	(13)				(13)
Unrealized (loss) gain on derivatives, net of tax	(63)				(63)
Pensions and other postretirement benefit adjustments, net of tax	0
BALANCE (in shares) at Mar. 30, 2019		57,304,097
BALANCE (in shares) at Mar. 30, 2019						(4,161,326)
BALANCE at Mar. 30, 2019		$ 1	1,291	(1,851)	(157)	$ (775)
NONCONTROLLING INTERESTS							9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders' deficit	(1,482)
NONCONTROLLING INTERESTS	10						10
Total stockholders' deficit	$ (2,884)
BALANCE (in shares) at Sep. 30, 2019	57,623,311	57,623,311
BALANCE (in shares) at Sep. 30, 2019	(4,161,326)					(4,161,326)
BALANCE at Sep. 30, 2019	$ (2,894)	$ 1	1,379	(3,120)	(379)	$ (775)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity of noncontrolling interested divested	(6)						(6)
Dividend Equivalent Payments On Certain Stock Options	(19)			(19)
Dividend Equivalent Declared On Certain Stock Options	(1,864)			(1,864)
Compensation expense recognized for employee stock options	23		23
Exercise of employee stock options		169,470
Exercise of employee stock options	20		20
Net income attributable to TD Group	(304)			304
Foreign currency translation adjustments, net of tax	98				98
Unrealized (loss) gain on derivatives, net of tax	23				23
Pensions and other postretirement benefit adjustments, net of tax	$ 6				6
BALANCE (in shares) at Dec. 28, 2019		57,792,781
BALANCE (in shares) at Dec. 28, 2019						(4,161,326)
BALANCE at Dec. 28, 2019		$ 1	1,422	(4,699)	(252)	$ (775)
BALANCE (in shares) at Sep. 30, 2019	57,623,311	57,623,311
BALANCE (in shares) at Sep. 30, 2019	(4,161,326)					(4,161,326)
BALANCE at Sep. 30, 2019	$ (2,894)	$ 1	1,379	(3,120)	(379)	$ (775)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to TD Group	(623)
Foreign currency translation adjustments, net of tax	(8)
Unrealized (loss) gain on derivatives, net of tax	(122)
Pensions and other postretirement benefit adjustments, net of tax	$ 6
BALANCE (in shares) at Mar. 28, 2020	57,792,781	58,233,574
BALANCE (in shares) at Mar. 28, 2020	(4,198,226)					(4,198,226)
BALANCE at Mar. 28, 2020	$ (4,209)	$ 1	1,488	(4,401)	(503)	$ (794)
NONCONTROLLING INTERESTS							4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders' deficit	(4,299)
BALANCE (in shares) at Dec. 28, 2019		57,792,781
BALANCE (in shares) at Dec. 28, 2019						(4,161,326)
BALANCE at Dec. 28, 2019		$ 1	1,422	(4,699)	(252)	$ (775)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividend Equivalent Payments On Certain Stock Options	(21)			(21)
Compensation expense recognized for employee stock options	17		17
Exercise of employee stock options		440,793
Exercise of employee stock options	49		49
Net income attributable to TD Group	(319)			319
Foreign currency translation adjustments, net of tax	(106)				(106)
Unrealized (loss) gain on derivatives, net of tax	(145)				(145)
Pensions and other postretirement benefit adjustments, net of tax	$ 0
BALANCE (in shares) at Mar. 28, 2020	57,792,781	58,233,574
BALANCE (in shares) at Mar. 28, 2020	(4,198,226)					(4,198,226)
BALANCE at Mar. 28, 2020	$ (4,209)	$ 1	$ 1,488	$ (4,401)	$ (503)	$ (794)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury Stock, Shares, Acquired						(36,900)
Treasury Stock, Value, Acquired, Cost Method	(19)					$ (19)
NONCONTROLLING INTERESTS	4						$ 4
Total stockholders' deficit	$ (4,205)

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LEASES (Tables)

6 Months Ended

Mar. 28, 2020

Leases [Abstract]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

Supplemental cash flow information related to leases for the twenty-six week period ended March 28, 2020 is as follows (in millions):

	March 28, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows from operating leases	$	14
Operating cash outflows from finance leases	2
Financing cash outflows from finance leases	1
Lease assets obtained in exchange for new lease obligations:
Operating leases	$	15

Lease, Cost [Table Text Block]

The components of lease expense for the thirteen and twenty-six week periods ended March 28, 2020 are as follows (in millions):

	Classification	Thirteen Week Period Ended March 28, 2020		Twenty-Six Week Period Ended March 28, 2020
Operating lease cost	Cost of Sales or Selling and Administrative Expenses	$	7	$	14
Finance lease cost
Amortization of leased assets	Cost of Sales	1		1
Interest on lease liabilities	Interest Expense - Net	1		2
Total lease cost		$	9	$	17

Leases, Supplemental Balance Sheet Information [Table Text Block]

Supplemental balance sheet information related to leases is as follows (in millions):

	Classification	March 28, 2020
Operating Leases
Operating lease right-of-use assets	Other Assets	$	102
Current operating lease liabilities	Accrued Liabilities	21
Long-term operating lease liabilities	Other Non-current Liabilities	86
Total operating lease liabilities		$	107
Finance Leases
Finance lease right-of-use assets, net	Property, Plant and Equipment—Net	$	71
Current finance lease liabilities	Accrued Liabilities	2
Long-term finance lease liabilities	Other Non-current Liabilities	56
Total finance lease liabilities		$	58

As of March 28, 2020, the Company has the following remaining lease term and weighted average discount rates:

Weighted-average remaining lease term
Operating leases	6.2 years
Finance leases	16.8 years
Weighted-average discount rate
Operating leases	6.2%
Finance leases	7.2%

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

Maturities of lease liabilities at March 28, 2020 are as follows (in millions):

	Operating Leases		Finance Leases
2020	$	14	$	3
2021	26		6
2022	22		6
2023	17		6
2024	14		6
Thereafter	38		76
Total future minimum lease payments	131		103
Less: imputed interest	24		45
Present value of lease liabilities reported	$	107	$	58

Finance Lease, Liability, Maturity [Table Text Block]

Maturities of lease liabilities at March 28, 2020 are as follows (in millions):

	Operating Leases		Finance Leases
2020	$	14	$	3
2021	26		6
2022	22		6
2023	17		6
2024	14		6
Thereafter	38		76
Total future minimum lease payments	131		103
Less: imputed interest	24		45
Present value of lease liabilities reported	$	107	$	58

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ACQUISITIONS AND DIVESTITURES - Narratives (Details) - USD ($) $ / shares in Units, $ in Millions						6 Months Ended		12 Months Ended
	Dec. 20, 2019	Sep. 20, 2019	Aug. 30, 2019	Mar. 14, 2019	Oct. 01, 2018	Mar. 28, 2020	Mar. 30, 2019	Sep. 30, 2019
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired						$ 0.0	$ 3,569.0
GOODWILL						7,846.0		$ 7,820.0
Esterline [Member]
Business Acquisition [Line Items]
Business Acquisition, Share Price				$ 122.50
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents				$ 398.2
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net				3,923.9
Payments to Acquire Businesses, Net of Cash Acquired				3,536.3
Restricted cash				387.6
GOODWILL				2,256.0
Amount of goodwill expected to be tax deductible				25.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				1,301.0
Business acquisition, Intangibles, Tax Deductible Amount				48.9
Loss Contingency Accrual				$ 267.9		211.1		231.8
Loss Contingency Accrual, Period Increase (Decrease)								19.8
Loss Contingency, Accrual, Current						64.3		60.0
Loss Contingency, Accrual, Noncurrent						$ 146.8		171.8
Stormscope [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired			$ 20.0
Amount of goodwill expected to be tax deductible			11.1
Business acquisition, Intangibles, Tax Deductible Amount			$ 7.5
Tax benefit recognition period (in years)			15 years
NavCom [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired					$ 27.0
Amount of goodwill expected to be tax deductible					$ 9.0
Tax benefit recognition period (in years)					15 years
Souriau Sunbank [Member]
Business Acquisition [Line Items]
Loss Contingency Accrual								$ 9.3
Divestiture, Sale Price	$ 920.0
Esterline Interface Technology Group [Member]
Business Acquisition [Line Items]
Divestiture, Sale Price		$ 190.0
Divestiture, Working Capital Adjustment		$ 0.7
Minimum [Member]
Business Acquisition [Line Items]
Air Transportation Equipment Estimated Useful Life						25 years
Maximum [Member]
Business Acquisition [Line Items]
Air Transportation Equipment Estimated Useful Life						30 years

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ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Accumulated Other Comprehensive Loss (Details) $ in Millions	6 Months Ended
	Mar. 28, 2020 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	$ (379)
Current-period other comprehensive (loss) income	(124)
Balance at end of period	(503)
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges (1)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(172)	[1]
Current-period other comprehensive (loss) income	(122)	[1]
Balance at end of period	(294)	[1]
Defined benefit pension plan activity (2)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(40)	[2]
Current-period other comprehensive (loss) income	6	[2]
Balance at end of period	(34)	[2]
Currency translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(167)
Current-period other comprehensive (loss) income	(8)
Balance at end of period	$ (175)

[1] Unrealized loss represents derivative instruments, net of taxes of $43 million and $19 million for the thirteen week periods ended March 28, 2020 and March 30, 2019, respectively, and $34 million and $41 million for the twenty-six week periods ended March 28, 2020 and March 30, 2019, respectively

[2] There were no material pension liability adjustments, net of taxes for the thirteen and twenty-six week periods ended March 28, 2020 and March 30, 2019.

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SEGMENTS - EBITDA Defined by Segment to Consolidated Income Before Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
EBITDA As Defined	$ 675	$ 566	$ 1,356	$ 1,053
Interest expense - net	252	202	501	374
Stock compensation expense			37	38
Refinancing Costs	3	3	26	3
Income from continuing operations before income taxes	337	263	629	513
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
EBITDA As Defined	691	584	1,394	1,084
Operating Segments | Power & Control
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
EBITDA As Defined	381	329	766	628
Operating Segments | Airframe
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
EBITDA As Defined	296	243	602	434
Operating Segments | Non- aviation
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
EBITDA As Defined	14	12	26	22
Corporate, Non-Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
EBITDA As Defined	16	18	38	31
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization expense	72	39	141	74
Interest expense - net	(252)	(202)	(501)	(374)
Acquisition-related costs	9	38	16	50
Stock compensation expense	12	21	37	38
Refinancing Costs		3		3
Other, net	$ (10)	$ 0	$ 6	$ 1

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REVENUE Narrative (Policies)

6 Months Ended

Mar. 28, 2020

Revenue Recognition [Abstract]

Revenue [Policy Text Block]

REVENUE RECOGNITION

TransDigm's sales are concentrated in the aerospace industry. The Company’s customers include: distributors of aerospace components, commercial airlines, large commercial transport and regional and business aircraft OEMs, various armed forces of the United States and friendly foreign governments, defense OEMs, system suppliers, and various other industrial customers.

The majority of the Company's revenue is recorded at a point in time. Revenue is recognized from the sale of products when control transfers to the customer, which is demonstrated by our right to payment, a transfer of title, a transfer of the risk and rewards of ownership, or the customer acceptance, but most frequently upon shipment where the customer obtains physical possession of the goods.

In some contracts, control transfers to the customer over time, primarily in contracts where the customer is required to pay for the cost of both the finished and unfinished goods at the time of cancellation plus a reasonable profit relative to the work performed for products that were customized for the customer. Therefore, we recognize revenue over time for those agreements that have a right to margin and where the products being produced have no alternative use. 

Based on our production cycle, it is generally expected that goods related to the revenue will be shipped and billed within the current year. For revenue recognized over time, we estimate the amount of revenue attributable to a contract earned at a given point during the production cycle based on certain costs, such as materials and labor incurred to date, plus the expected profit, which is a cost-to-cost input method.

The Company’s payment terms vary by the type and location of the customer and the products or services offered. The Company does not offer any payment terms that would meet the requirements for consideration as a significant financing component.

Shipping and handling fees and costs incurred in connection with products sold are recorded in cost of sales in the condensed consolidated statements of income, and are not considered a performance obligation to our customers.

The Company pays sales commissions that relate to contracts for products or services that are satisfied at a point in time or over a period of one year or less and are expensed as incurred. These costs are reported as a component of selling and administrative expenses in the unaudited condensed consolidated statements of income.

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COMMITMENTS AND CONTINGENCIES (Notes)

6 Months Ended

Mar. 28, 2020

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies Disclosure [Text Block]

COMMITMENTS AND CONTINGENCIES

On August 8, 2019, a fire caused significant damage to the Niort, France operating facility of Leach International Europe, which is a subsidiary of TransDigm acquired via the Esterline acquisition. Leach International Europe’s results are reported within the Company’s Power & Control segment. The facility as well as certain machinery, equipment and inventory sustained damage. The Company suspended operations at the Niort facility as a result of the fire; however, has transferred certain operations to temporary facilities until operations are fully restored at the rebuilt facility. The facility is estimated to be complete and fully operational between the first and second quarter of fiscal 2021. 

The Company’s insurance covers damage to the facility, equipment, inventory, and other assets, at replacement cost, as well as business interruption, and recovery-related expenses caused by the fire, subject to a $1 million deductible and certain sub-limits based on the nature of the covered item. Anticipated insurance recoveries related to losses and incremental costs incurred are recognized when receipt is probable. Anticipated insurance recoveries in excess of net book value of the damaged property and inventory will not be recorded until all contingencies relating to the claim have been resolved. The timing of and amounts of ultimate insurance recoveries is not known at this time. Expenses incurred relating to this event for the thirteen and twenty-six week periods ended March 28, 2020 were not material.

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SEGMENTS

6 Months Ended

Mar. 28, 2020

Segment Reporting [Abstract]

SEGMENTS

SEGMENTS

The Company’s businesses are organized and managed in three reporting segments: Power & Control, Airframe and Non-aviation.

The Power & Control segment includes operations that primarily develop, produce and market systems and components that predominately provide power to or control power of the aircraft utilizing electronic, fluid, power and mechanical motion control technologies. Major product offerings include mechanical/electro-mechanical actuators and controls, ignition systems and engine technology, specialized pumps and valves, power conditioning devices, specialized AC/DC electric motors and generators, databus and power controls, advanced sensor products, switches and relay panels, high performance hoists, winches and lifting devices and cargo loading and handling systems. Primary customers of this segment are engine and power system and subsystem suppliers, airlines, third party maintenance suppliers, military buying agencies and repair depots. Products are sold in the original equipment and aftermarket market channels.

The Airframe segment includes operations that primarily develop, produce and market systems and components that are used in non-power airframe applications utilizing airframe and cabin structure technologies. Major product offerings include engineered latching and locking devices, rods and locking devices, engineered connectors and elastomers, cockpit security components and systems, aircraft audio systems, specialized lavatory components, seat belts and safety restraints, engineered interior surfaces and related components, advanced displays, thermal protection, lighting and control technology, military personnel parachutes and cargo delivery systems. Primary customers of this segment are airframe manufacturers and cabin system suppliers and subsystem suppliers, airlines, third party maintenance suppliers, military buying agencies and repair depots. Products are sold in the original equipment and aftermarket market channels.

The Non-aviation segment includes operations that primarily develop, produce and market products for non-aviation markets. Major product offerings include headsets for high-noise, medium-noise, and dismounted applications, seat belts and safety restraints for ground transportation applications, mechanical/electro-mechanical actuators and controls for space applications, hydraulic/electromechanical actuators and fuel valves for land based gas turbines, and refueling systems for heavy equipment used in mining, construction and other industries and turbine controls for the energy and oil and gas markets. Primary customers of this segment are off-road vehicle suppliers and subsystem suppliers, child restraint system suppliers, satellite and space system suppliers, manufacturers of heavy equipment used in mining, construction and other industries and turbine original equipment manufacturers, gas pipeline builders and electric utilities.

The primary measurement used by management to review and assess the operating performance of each segment is EBITDA As Defined. The Company defines EBITDA As Defined as earnings before interest, taxes, depreciation and amortization plus certain non-operating items recorded as corporate expenses including refinancing costs, acquisition-related costs, transaction-related costs, foreign currency gains and losses, and non-cash compensation charges incurred in connection with the Company’s stock incentive plans. Acquisition-related costs represent accounting adjustments to inventory associated with acquisitions of businesses and product lines that were charged to cost of sales when the inventory was sold; costs incurred to integrate acquired businesses and product lines into the Company’s operations, facility relocation costs and other acquisition-related costs; transaction related costs comprising deal fees; legal, financial and tax diligence expenses and valuation costs that are required to be expensed as incurred and other acquisition accounting adjustments.

EBITDA As Defined is not a measurement of financial performance under US GAAP. Although the Company uses EBITDA As Defined to assess the performance of its business and for various other purposes, the use of this non-GAAP financial measure as an analytical tool has limitations, and it should not be considered in isolation or as a substitute for analysis of the Company’s results of operations as reported in accordance with US GAAP.

The Company’s segments are reported on the same basis used internally for evaluating performance and for allocating resources. The accounting policies for each segment are the same as those described in the summary of significant accounting policies in the Company’s consolidated financial statements. Intersegment sales and transfers are recorded at values based on market prices, which creates intercompany profit on intersegment sales or transfers that is eliminated in consolidation. Intersegment sales were immaterial for the periods presented below. Certain corporate-level expenses are allocated to the operating segments.

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DISCONTINUED OPERATIONS (Tables)

6 Months Ended

Mar. 28, 2020

Souriau Sunbank and EIT [Member]

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Disposal Groups, Including Discontinued Operations [Table Text Block]

	Thirteen Week Period Ended					Twenty-Six Week Period Ended
	March 28, 2020			March 30, 2019		March 28, 2020		March 30, 2019
Net sales	$	—		$	28	$	79	$	28
Income from discontinued operations before income taxes	—			3		13		3
Income tax expense	1			1		5		1
(Loss) Income from discontinued operations, net of tax	(1		)	2		8		2
(Loss) Gain from sale of discontinued operations, net of tax	(3		)	—		60		—
(Loss) Income from discontinued operations, net of tax	$	(4	)	$	2	$	68	$	2

Souriau Sunbank [Member]

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Disposal Groups, Including Discontinued Operations [Table Text Block]

The following is the summarized balance sheet of Souriau-Sunbank’s assets held-for-sale and liabilities held-for-sale as of September 30, 2019 (in millions):

Assets and Liabilities of Discontinued Operations Held-for-Sale	Fiscal Year Ended September 30, 2019
Cash and cash equivalents	$	29
Trade accounts receivable—Net	67
Inventories—Net	88
Prepaid expenses and other	2
Property, plant and equipment—Net	101
Goodwill	480
Other intangibles—Net	194
Other	1
Total assets of discontinued operations	$	962
Accounts payable	$	33
Accrued liabilities	55
Long-term debt	6
Deferred income taxes	42
Other	21
Total liabilities of discontinued operations	$	157

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ACQUISITIONS AND DIVESTITURES - Business Combinations Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Mar. 28, 2020	Sep. 30, 2019	Mar. 14, 2019
Business Acquisition [Line Items]
Goodwill	$ 7,846.0	$ 7,820.0
Esterline [Member]
Business Acquisition [Line Items]
Current assets, excluding cash acquired			$ 384.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory			583.0
Other			423.0
Property, plant, and equipment			469.0
Intangible assets			1,301.0
Goodwill			2,256.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets			20.0
Total assets acquired			5,436.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable			146.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other			751.0
Other noncurrent liabilities			615.0
Total liabilities assumed			1,512.0
Net assets acquired			$ 3,923.9

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Condensed Consolidated Balance Sheets Parenthetical - $ / shares	Mar. 28, 2020	Sep. 30, 2019
Statement of Financial Position [Abstract]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	224,400,000	224,400,000
Common Stock, Shares, Issued	57,792,781	57,623,311
Treasury Stock, Shares	(4,198,226)	(4,161,326)

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Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
OPERATING ACTIVITIES:
Net Income	$ 624	$ 398
Net income from discontinued operations	(68)	(2)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	55	32
Amortization of intangible assets	86	42
Amortization of debt issuance costs, original issue discount and premium	16	13
Amortization of inventory step-up	0	20
Loss contracts amortization	(25)	(5)
Refinancing costs	26	3
Non-cash equity compensation	37	38
Deferred income taxes	(9)	(7)
Changes in assets/liabilities, net of effects from acquisitions of businesses:
Trade accounts receivable	74	(7)
Inventories	(97)	(45)
Income taxes receivable/payable	(73)	16
Other assets	(32)	(54)
Accounts payable	(12)	1
Accrued interest	68	28
Accrued and other liabilities	(76)	(18)
Net Cash Provided by (Used in) Operating Activities	594	453
INVESTING ACTIVITIES:
Capital expenditures	(50)	(44)
Payments made in connection with acquisitions, net of cash acquired	0	(3,569)
Proceeds in connection with the sale of discontinued operations, net	904	0
Net Cash Provided by (Used in) Investing Activities	854	(3,613)
FINANCING ACTIVITIES:
Proceeds from exercise of stock options	69	47
Dividends and dividend equivalent payments	(1,928)	(24)
Payments for Repurchase of Common Stock	(19)	0
Proceeds from Lines of Credit	200	0
Repayments of Long-term Debt	(19)	(38)
Redemption of senior subordinated notes due 2022, net	0	(550)
Repayments of Other Long-term Debt	(1,168)	0
Proceeds from 5.50% senior subordinated notes due 2027, net	0	545
Proceeds from Issuance of Senior Long-term Debt	0	3,937
Proceeds from Issuance of Long-term Debt	2,625	0
Financing fees and other, net	(8)	(2)
Net Cash Provided by (Used in) Financing Activities	(248)	3,915
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	1	1
NET INCREASE IN CASH AND CASH EQUIVALENTS	1,201	756
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	1,467	2,073
CASH AND CASH EQUIVALENTS, END OF PERIOD	2,668	2,829
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for interest	424	365
Cash paid during the period for income taxes, net of refunds	$ 183	$ 121

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EARNINGS PER SHARE (TWO-CLASS METHOD) - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Earnings Per Share [Abstract]
Income from continuing operations	$ 323	$ 200	$ 556	$ 396
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0	(1)	0
Net income from continuing operations attributable to TD Group	323	200	555	396
Numerator for earnings per share:
Less: Special dividends declared or paid on participating securities	0	0	(185)	(24)
Net Income Loss Attributable to Continuing Operations Available To Common Stockholders Basic And Vested Options Deemed Participating Securities	323	200	370	372
(LOSS) INCOME FROM DISCONTINUED OPERATIONS, NET OF TAX	(4)	2	68	2
Net income applicable to TD Group common stockholders - basic and diluted	$ 319	$ 202	$ 438	$ 374
Denominator for basic and diluted earnings per share under the two-class method, in shares:
Weighted-average common shares outstanding	53.8	53.0	53.7	52.9
Vested options deemed participating securities	3.6	3.3	3.7	3.4
Basic and diluted (in shares)	57.4	56.3	57.4	56.3
Earnings per share from continuing operations - basic and diluted	$ 5.63	$ 3.56	$ 6.45	$ 6.61
(Loss) Earnings per share from discontinued operations - basic and diluted	(0.07)	0.04	1.18	0.04
Basic and diluted earnings per share (in dollars per share)	$ 5.56	$ 3.60	$ 7.63	$ 6.65

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ACCUMULATED OTHER COMPREHENSIVE LOSS - Narratives (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Loss, Derivatives Qualifying as Hedges, Tax	$ 34.0	$ 41.0

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SEGMENTS - Net Sales by Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Segment Reporting Information [Line Items]
NET SALES	$ 1,443	$ 1,168	$ 2,908	$ 2,161
Operating Segments | Power & Control
Segment Reporting Information [Line Items]
NET SALES	747	631	1,499	1,192
Operating Segments | Airframe
Segment Reporting Information [Line Items]
NET SALES	655	499	1,329	898
Operating Segments | Non- aviation
Segment Reporting Information [Line Items]
NET SALES	41	38	80	71
Commercial OEM [Member] | Operating Segments | Power & Control
Segment Reporting Information [Line Items]
NET SALES	191	146	375	278
Commercial OEM [Member] | Operating Segments | Airframe
Segment Reporting Information [Line Items]
NET SALES	243	176	473	308
Commercial Aftermarket [Member] | Operating Segments | Power & Control
Segment Reporting Information [Line Items]
NET SALES	225	186	445	344
Commercial Aftermarket [Member] | Operating Segments | Airframe
Segment Reporting Information [Line Items]
NET SALES	220	203	465	382
Defense [Member] | Operating Segments | Power & Control
Segment Reporting Information [Line Items]
NET SALES	331	299	679	570
Defense [Member] | Operating Segments | Airframe
Segment Reporting Information [Line Items]
NET SALES	$ 192	$ 120	$ 391	$ 208

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DERIVATIVES AND HEDGING ACTIVITIES - Schedule of Notional Amounts of Outstanding Derivatives (Details) - USD ($) $ in Millions		6 Months Ended
		Mar. 28, 2020	Mar. 30, 2019
Tranche F | Interest Rate Swap
Derivative [Line Items]
Derivative, Fixed Interest Rate		4.90%
Derivative, Variable Interest Rate		2.40%
Derivative, Basis Spread on Variable Rate		2.50%
Derivative, Notional Amount		$ 1,000
Tranche F | Interest rate swap June 28, 2016 [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 1,000
Tranche F | Interest rate swap beginning June 30, 2021 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate		5.50%
Derivative, Variable Interest Rate		3.00%
Derivative, Basis Spread on Variable Rate		2.50%
Derivative, Notional Amount		$ 1,400
Tranche F | Interest Rate Cap
Derivative [Line Items]
Derivative, Cap Interest Rate		2.50%
Tranche F | Interest rate cap agreements beginning June 30, 2016 [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 400
Derivative, Cap Interest Rate		2.00%
Tranche E | Interest rate cap beginning September 30, 2015 [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 750
Derivative, Cap Interest Rate		2.50%
Tranche E | Interest rate cap beginning June 30, 2020 [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 750
Tranche E | Interest rate swap beginning March 31, 2016 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate		5.30%
Derivative, Variable Interest Rate		2.80%
Derivative, Basis Spread on Variable Rate		2.50%
Derivative, Notional Amount		$ 750
Tranche E | Interest rate swap beginning June 29, 2018 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate		5.50%
Derivative, Variable Interest Rate		3.00%
Derivative, Basis Spread on Variable Rate		2.50%
Derivative, Notional Amount		$ 500
Tranche E | Interest rate swap beginning June 30, 2020 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate		5.00%
Derivative, Variable Interest Rate		2.50%
Derivative, Basis Spread on Variable Rate		2.50%
Derivative, Notional Amount		$ 750
Tranche E | Interest rate swap beginning June 30, 2022 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate		5.60%
Derivative, Variable Interest Rate		3.10%
Derivative, Basis Spread on Variable Rate		2.50%
Derivative, Notional Amount		$ 1,500
Tranche G [Member] | Interest Rate Swap
Derivative [Line Items]
Derivative, Fixed Interest Rate		4.40%
Derivative, Variable Interest Rate		1.90%
Derivative, Basis Spread on Variable Rate		2.50%
Derivative, Notional Amount		$ 500
Tranche G [Member] | Interest Rate Cap
Derivative [Line Items]
Derivative, Notional Amount		$ 400
Tranche G [Member] | Interest rate swap beginning September 30, 2017 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate		4.40%
Derivative, Variable Interest Rate		1.90%
Derivative, Basis Spread on Variable Rate		2.50%
Derivative, Notional Amount		$ 400
Tranche G [Member] | Interest rate swap beginning December 31, 2021 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate		5.60%
Derivative, Variable Interest Rate		3.10%
Derivative, Basis Spread on Variable Rate		2.50%
Derivative, Notional Amount		$ 900
Tranche G [Member] | Interest rate swap beginning September 30, 2022 [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate		5.50%
Derivative, Variable Interest Rate		3.00%
Derivative, Basis Spread on Variable Rate		2.50%
Derivative, Notional Amount		$ 400
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges (1) | Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative [Line Items]
Interest Expense	[1]	$ (2)	$ (1)

[1] This component of accumulated other comprehensive (loss) income is included in interest expense (see Note 12, “Derivatives and Hedging Activities,” for additional information).

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DEBT - Schedule of Debt (Detail) - USD ($) $ in Millions		Mar. 28, 2020	Oct. 29, 2019	Sep. 30, 2019	Feb. 01, 2019
Debt Instrument [Line Items]
Gross Amount		$ 18,388.0		$ 16,713.0
Debt Issuance Costs		(154.0)		(149.0)
Debt Instrument, Unamortized Discount (Premium), Net		(22.0)		(15.0)
Short-term borrowings—trade receivable securitization facility		350.0		350.0
Total debt outstanding		18,212.0		16,549.0
Long-term Debt, Current Maturities, Net		279.0		80.0
Long-term Debt, Excluding Current Maturities, Gross		18,108.0		16,632.0
Deferred Finance Costs, Excluding Current Maturities		(153.0)		(148.0)
Debt Instrument, Unamortized Discount, Excluding Current Maturities		(22.0)		(15.0)
Long-term debt		17,933.0		16,469.0
Term loans
Debt Instrument [Line Items]
Gross Amount		7,503.0		7,524.0
Debt Issuance Costs		(52.0)		(58.0)
Debt Instrument, Unamortized Discount (Premium), Net		(24.0)		(17.0)
Total debt outstanding	[1]	7,427.0		$ 7,449.0
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Gross Amount		200.0
Debt Issuance Costs		0.0
Debt Instrument, Unamortized Discount (Premium), Net		0.0
Total debt outstanding		$ 200.0
Senior Subordinated Notes | 6.00% senior subordinated notes due 2022 (2022 Notes)
Debt Instrument [Line Items]
Interest rate		6.00%		6.00%
Gross Amount				$ 1,150.0
Debt Issuance Costs				(4.0)
Debt Instrument, Unamortized Discount (Premium), Net				0.0
Total debt outstanding	[1]	$ 0.0		$ 1,146.0
Senior Subordinated Notes | 6.50% senior subordinated notes due 2024 (2024 Notes)
Debt Instrument [Line Items]
Interest rate		6.50%		6.50%
Gross Amount		$ 1,200.0		$ 1,200.0
Debt Issuance Costs		(5.0)		(6.0)
Debt Instrument, Unamortized Discount (Premium), Net		0.0		0.0
Total debt outstanding	[1]	$ 1,195.0		$ 1,194.0
Senior Subordinated Notes | 6.50% senior subordinated notes due 2025 (2025 Notes)
Debt Instrument [Line Items]
Interest rate		6.50%		6.50%
Gross Amount		$ 750.0		$ 750.0
Debt Issuance Costs		(3.0)		(3.0)
Debt Instrument, Unamortized Discount (Premium), Net		3.0		3.0
Total debt outstanding	[1]	$ 750.0		$ 750.0
Senior Subordinated Notes | 6.375% senior subordinated notes due 2026 (6.375% 2026 Notes)
Debt Instrument [Line Items]
Interest rate		6.375%		6.375%
Gross Amount		$ 950.0		$ 950.0
Debt Issuance Costs		(6.0)		(7.0)
Debt Instrument, Unamortized Discount (Premium), Net		0.0		0.0
Total debt outstanding	[1]	$ 944.0		$ 943.0
Senior Subordinated Notes | 6.875% senior subordinated noted due 2026 [Member]
Debt Instrument [Line Items]
Interest rate		6.875%		6.875%
Gross Amount		$ 500.0		$ 500.0
Debt Issuance Costs		(5.0)		(6.0)
Debt Instrument, Unamortized Discount (Premium), Net		(3.0)		(3.0)
Total debt outstanding	[1]	$ 492.0		491.0
Senior Subordinated Notes | Senior Subordinated Notes $550M Due 2027 7.50% [Member]
Debt Instrument [Line Items]
Interest rate		7.50%
Gross Amount		$ 550.0		550.0
Debt Issuance Costs		(5.0)		(5.0)
Debt Instrument, Unamortized Discount (Premium), Net		0.0		0.0
Total debt outstanding	[1]	545.0		545.0
Senior Subordinated Notes | Senior Subordinated Notes $2650M Due 2027 5.50% [Member]
Debt Instrument [Line Items]
Interest rate			5.50%
Gross Amount		2,650.0	$ 2,650.0
Debt Issuance Costs		(23.0)
Debt Instrument, Unamortized Discount (Premium), Net		0.0
Total debt outstanding	[1]	$ 2,627.0		0.0
Senior Notes | Senior Secured Notes $4B Due 2026 6.25% [Member]
Debt Instrument [Line Items]
Interest rate		6.25%
Gross Amount		$ 4,000.0		4,000.0	$ 4,000.0
Debt Issuance Costs		(55.0)		(60.0)
Debt Instrument, Unamortized Discount (Premium), Net		2.0		2.0
Total debt outstanding		3,947.0		3,942.0
Government Refundable Advances [Member]
Debt Instrument [Line Items]
Debt Issuance Costs		0.0		0.0
Debt Instrument, Unamortized Discount (Premium), Net		0.0		0.0
Total debt outstanding		27.0		39.0
Government refundable advances		26.7		39.2
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Debt Issuance Costs		0.0		0.0
Debt Instrument, Unamortized Discount (Premium), Net		0.0		0.0
Total debt outstanding		58.0		50.0
Capital Lease Obligations		57.5		49.9
Asset-backed Securities
Debt Instrument [Line Items]
Short-term borrowings—trade receivable securitization facility, Gross		350.0		350.0
Debt Issuance Costs		0.0		0.0
Debt Instrument, Unamortized Discount (Premium), Net		0.0		0.0
Short-term borrowings—trade receivable securitization facility	[1]	350.0		350.0
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total debt outstanding	[1]	200.0		0.0
Less current portion
Debt Instrument [Line Items]
Debt Issuance Costs		(1.0)		(1.0)
Debt Instrument, Unamortized Discount (Premium), Net				0.0
Original Issue Discount or Premium		0.0
Long-term Debt, Current Maturities, Gross		280.0		81.0
Long-term Debt, Current Maturities, Net		$ 279.0		$ 80.0

[1] The carrying amount of the debt instrument is presented net of debt issuance costs, premium and discount. Refer to Note 9, "Debt," for gross carrying amounts.

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INVENTORIES - Schedule of Inventory (Details) - USD ($) $ in Millions	Mar. 28, 2020	Sep. 30, 2019
Inventory Disclosure [Abstract]
Raw materials and purchased component parts	$ 867	$ 805
Work-in-progress	389	360
Finished goods	208	192
Total	1,464	1,357
Reserves for excess and obsolete inventory	(151)	(124)
Inventories - Net	$ 1,313	$ 1,233

XML

LEASES Maturities of Lease Liabilities (Details) $ in Millions	Mar. 28, 2020 USD ($)
Leases [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 14
Operating Leases, Future Minimum Payments, Due in Two Years	26
Operating Leases, Future Minimum Payments, Due in Three Years	23
Operating Leases, Future Minimum Payments, Due in Four Years	18
Operating Leases, Future Minimum Payments, Due in Five Years	14
Operating Leases, Future Minimum Payments, Due Thereafter	39
Operating Leases, Future Minimum Payments Due	$ 134

XML

SUPPLEMENTAL GUARANTOR INFORMATION - Supplemental Condensed Consolidating Balance Sheet (Details) - USD ($) $ in Millions	Mar. 28, 2020	Sep. 30, 2019
Condensed Balance Sheet Statements, Captions [Line Items]
DEFERRED INCOME TAXES	$ 13	$ 0
Cash and cash equivalents	2,668	1,467
Trade accounts receivable—Net	999	1,068
Inventories—Net	1,313	1,233
Assets held-for-sale	0	962
Prepaid expenses and other	220	135
Total current assets	5,200	4,865
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	0	0
PROPERTY, PLANT AND EQUIPMENT—NET	748	757
GOODWILL	7,846	7,820
OTHER INTANGIBLE ASSETS—NET	2,669	2,744
OTHER	159	69
TOTAL ASSETS	16,635	16,255
Current portion of long-term debt	279	80
Short-term borrowings—trade receivable securitization facility	350	350
Accounts payable	266	276
Accrued liabilities	761	675
Liabilities held-for-sale	0	157
Total current liabilities	1,656	1,538
LONG-TERM DEBT	17,933	16,469
Deferred Tax Liabilities, Gross	385	441
OTHER NON-CURRENT LIABILITIES	866	691
Total liabilities	20,840	19,139
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	(4,209)	(2,894)
NONCONTROLLING INTERESTS	4	10
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	16,635	16,255
Eliminations
Condensed Balance Sheet Statements, Captions [Line Items]
DEFERRED INCOME TAXES	0
Cash and cash equivalents	0	0
Trade accounts receivable—Net	0	0
Inventories—Net	(17)	(15)
Assets held-for-sale		0
Prepaid expenses and other	0	0
Total current assets	(17)	(15)
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	(43,608)	(36,081)
PROPERTY, PLANT AND EQUIPMENT—NET	0	0
GOODWILL	0	0
OTHER INTANGIBLE ASSETS—NET	0	0
OTHER	0	0
TOTAL ASSETS	(43,625)	(36,096)
Current portion of long-term debt	0	0
Short-term borrowings—trade receivable securitization facility	0	0
Accounts payable	0	0
Accrued liabilities	0	0
Liabilities held-for-sale		0
Total current liabilities	0	0
LONG-TERM DEBT	0	0
Deferred Tax Liabilities, Gross	0	0
OTHER NON-CURRENT LIABILITIES	0	0
Total liabilities	0	0
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	(43,625)	(36,096)
NONCONTROLLING INTERESTS	0	0
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	(43,625)	(36,096)
TransDigm Group
Condensed Balance Sheet Statements, Captions [Line Items]
DEFERRED INCOME TAXES	0
Cash and cash equivalents	21	0
Trade accounts receivable—Net	0	0
Inventories—Net	0	0
Assets held-for-sale		0
Prepaid expenses and other	0	0
Total current assets	21	0
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	(4,230)	(2,894)
PROPERTY, PLANT AND EQUIPMENT—NET	0	0
GOODWILL	0	0
OTHER INTANGIBLE ASSETS—NET	0	0
OTHER	0	0
TOTAL ASSETS	(4,209)	(2,894)
Current portion of long-term debt	0	0
Short-term borrowings—trade receivable securitization facility	0	0
Accounts payable	0	0
Accrued liabilities	0	0
Liabilities held-for-sale		0
Total current liabilities	0	0
LONG-TERM DEBT	0	0
Deferred Tax Liabilities, Gross	0	0
OTHER NON-CURRENT LIABILITIES	0	0
Total liabilities	0	0
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	(4,209)	(2,894)
NONCONTROLLING INTERESTS	0	0
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	(4,209)	(2,894)
TransDigm Inc.
Condensed Balance Sheet Statements, Captions [Line Items]
DEFERRED INCOME TAXES	0
Cash and cash equivalents	2,245	1,092
Trade accounts receivable—Net	0	0
Inventories—Net	56	52
Assets held-for-sale		0
Prepaid expenses and other	92	27
Total current assets	2,393	1,171
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	17,962	14,729
PROPERTY, PLANT AND EQUIPMENT—NET	18	17
GOODWILL	83	83
OTHER INTANGIBLE ASSETS—NET	25	25
OTHER	9	6
TOTAL ASSETS	20,490	16,031
Current portion of long-term debt	275	76
Short-term borrowings—trade receivable securitization facility	0	0
Accounts payable	17	17
Accrued liabilities	249	215
Liabilities held-for-sale		0
Total current liabilities	541	308
LONG-TERM DEBT	17,368	15,893
Deferred Tax Liabilities, Gross	0	0
OTHER NON-CURRENT LIABILITIES	434	315
Total liabilities	18,343	16,516
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	2,147	(485)
NONCONTROLLING INTERESTS	0	0
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	20,490	16,031
TransDigm UK [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
DEFERRED INCOME TAXES	0
Cash and cash equivalents	1	0
Trade accounts receivable—Net	0	0
Inventories—Net	0	0
Assets held-for-sale		0
Prepaid expenses and other	0	0
Total current assets	1	0
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	974	975
PROPERTY, PLANT AND EQUIPMENT—NET	0	0
GOODWILL	0	0
OTHER INTANGIBLE ASSETS—NET	0	0
OTHER	0	0
TOTAL ASSETS	975	975
Current portion of long-term debt	0	0
Short-term borrowings—trade receivable securitization facility	0	0
Accounts payable	0	0
Accrued liabilities	13	12
Liabilities held-for-sale		0
Total current liabilities	13	12
LONG-TERM DEBT	492	492
Deferred Tax Liabilities, Gross	0	0
OTHER NON-CURRENT LIABILITIES	0	0
Total liabilities	505	504
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	470	471
NONCONTROLLING INTERESTS	0	0
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	975	975
Subsidiary Guarantors
Condensed Balance Sheet Statements, Captions [Line Items]
DEFERRED INCOME TAXES	0
Cash and cash equivalents	(15)	(12)
Trade accounts receivable—Net	147	172
Inventories—Net	936	880
Assets held-for-sale		206
Prepaid expenses and other	63	45
Total current assets	1,131	1,291
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	19,222	16,373
PROPERTY, PLANT AND EQUIPMENT—NET	512	513
GOODWILL	6,413	5,544
OTHER INTANGIBLE ASSETS—NET	2,025	2,064
OTHER	104	35
TOTAL ASSETS	29,407	25,820
Current portion of long-term debt	1	1
Short-term borrowings—trade receivable securitization facility	0	0
Accounts payable	151	160
Accrued liabilities	239	237
Liabilities held-for-sale		22
Total current liabilities	391	420
LONG-TERM DEBT	42	49
Deferred Tax Liabilities, Gross	289	347
OTHER NON-CURRENT LIABILITIES	268	233
Total liabilities	990	1,049
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	28,417	24,771
NONCONTROLLING INTERESTS	0	0
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	29,407	25,820
Non- Guarantor Subsidiaries
Condensed Balance Sheet Statements, Captions [Line Items]
DEFERRED INCOME TAXES	13
Cash and cash equivalents	416	387
Trade accounts receivable—Net	852	896
Inventories—Net	338	316
Assets held-for-sale		756
Prepaid expenses and other	65	63
Total current assets	1,671	2,418
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	9,680	6,898
PROPERTY, PLANT AND EQUIPMENT—NET	218	227
GOODWILL	1,350	2,193
OTHER INTANGIBLE ASSETS—NET	619	655
OTHER	46	28
TOTAL ASSETS	13,597	12,419
Current portion of long-term debt	3	3
Short-term borrowings—trade receivable securitization facility	350	350
Accounts payable	98	99
Accrued liabilities	260	211
Liabilities held-for-sale		135
Total current liabilities	711	798
LONG-TERM DEBT	31	35
Deferred Tax Liabilities, Gross	96	94
OTHER NON-CURRENT LIABILITIES	164	143
Total liabilities	1,002	1,070
TD GROUP STOCKHOLDERS' (DEFICIT) EQUITY	12,591	11,339
NONCONTROLLING INTERESTS	4	10
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	$ 13,597	$ 12,419

XML

DEBT

6 Months Ended

Mar. 28, 2020

Debt Disclosure [Abstract]

DEBT

DEBT

The Company’s debt consists of the following (in millions):

	March 28, 2020
	Gross Amount		Debt Issuance Costs			Original Issue Discount or Premium			Net Amount
Short-term borrowings—trade receivable securitization facility	$	350	$	—		$	—		$	350
Term loans	$	7,503	$	(52	)	$	(24	)	$	7,427
Revolving credit facility	200		—			—			200
6.50% senior subordinated notes due 2024 (2024 Notes)	1,200		(5		)	—			1,195
6.50% senior subordinated notes due 2025 (2025 Notes)	750		(3		)	3			750
6.375% senior subordinated notes due 2026 (6.375% 2026 Notes)	950		(6		)	—			944
6.875% senior subordinated notes due 2026 (6.875% 2026 Notes)	500		(5		)	(3		)	492
6.25% secured notes due 2026 (2026 Secured Notes)	4,000		(55		)	2			3,947
7.50% senior subordinated notes due 2027 (7.50% 2027 Notes)	550		(5		)	—			545
5.50% senior subordinated notes due 2027 (5.50% 2027 Notes	2,650		(23		)	—			2,627
Government refundable advances	27		—			—			27
Finance lease obligations	58		—			—			58
	18,388		(154		)	(22		)	18,212
Less current portion	280		(1		)	—			279
Long-term debt	$	18,108	$	(153	)	$	(22	)	$	17,933

	September 30, 2019
	Gross Amount		Debt Issuance Costs			Original Issue Discount or Premium			Net Amount
Short-term borrowings—trade receivable securitization facility	$	350	$	—		$	—		$	350
Term loans	$	7,524	$	(58	)	$	(17	)	$	7,449
6.00% 2022 Notes	1,150		(4		)	—			1,146
6.50% 2024 Notes	1,200		(6		)	—			1,194
6.50% 2025 Notes	750		(3		)	3			750
6.375% 2026 Notes	950		(7		)	—			943
6.875% 2026 Notes	500		(6		)	(3		)	491
6.25% 2026 Secured Notes	4,000		(60		)	2			3,942
7.50% 2027 Notes	550		(5		)	—			545
Government refundable advances	39		—			—			39
Finance lease obligations	50		—			—			50
	16,713		(149		)	(15		)	16,549
Less current portion	81		(1		)	—			80
Long-term debt	$	16,632	$	(148	)	$	(15	)	$	16,469

Accrued interest, which is classified as a component of accrued liabilities, was $160.4 million and $92.6 million as of March 28, 2020 and September 30, 2019, respectively.

Issuance of Senior Subordinated Notes due 2027 – On October 29, 2019, the Company entered into a purchase agreement in connection with a private offering of $2,650 million in new 5.50% senior subordinated notes due 2027 (herein the "5.50% 2027 Notes"). The 5.50% 2027 Notes were issued pursuant to an indenture, dated as of November 13, 2019, among TransDigm, as issuer, TransDigm Group, TransDigm UK and the other subsidiaries of TransDigm named therein, as guarantors.

The 5.50% 2027 Notes bear interest at the rate of 5.50% per annum, which accrues from November 13, 2019 and is payable in arrears on May 15th and November 15th of each year, commencing on May 15, 2020. The 5.50% 2027 Notes mature on November 15, 2027, unless earlier redeemed or repurchased, and are subject to the terms and conditions set forth in the indenture.

The Company capitalized $23.6 million and expensed $1.1 million of refinancing costs representing debt issuance costs associated with the 5.50% 2027 Notes during the twenty-six week period ended March 28, 2020.

Repurchase of Senior Subordinated Notes due 2022 – On October 29, 2019, the Company announced a cash tender offer for any and all of its 2022 Notes outstanding. On November 26, 2019, the Company redeemed the principal amount of $1,150 million, plus accrued interest of approximately $25.5 million and early redemption premium of $17.3 million.

The Company wrote off $3.8 million in unamortized debt issuance costs during the twenty-six week period ended March 28, 2020 in conjunction with the redemption of the 2022 Notes.

Amendment No. 7 and Refinancing Facility Agreement – On February 6, 2020, the Company entered into Amendment No. 7 and Refinancing Facility Agreement (herein, "Amendment No. 7") to the Second Amended and Restated Credit Agreement dated as of June 4, 2014 (herein, the "Credit Agreement").

Under the terms of Amendment No. 7, the Company, among other things, (i) incurred new tranche E term loans in an aggregate principal amount equal to approximately $2,216 million, new tranche F term loans in an aggregate principal amount equal to approximately $3,515 million and new tranche G term loans, (collectively, the "New Term Loans") in an aggregate principal amount equal to approximately $1,774 million, (ii) repaid in full all of the prior existing tranche E term loans, tranche F term loans and tranche G term loans outstanding under the Credit Agreement immediately prior to Amendment No. 7 and (iii) extend the maturity date of the new tranche F term loans to December 9, 2025. The New Term Loans were fully drawn on February 6, 2020. The LIBOR interest rate per annum applicable to the New Term Loans is 2.25%, a decrease from the 2.50% rate that applied to the previous existing term loans.

In addition to a discount of $8.8 million recorded in conjunction with the new tranche F term loans, the Company capitalized $1.6 million and expensed $1.9 million of refinancing costs representing debt issuance costs associated with Amendment No. 7 during the twenty-six week period ended March 28, 2020.

Revolving Credit Facility – On March 24, 2020, the Company drew $200 million on the revolving commitments. As of March 28, 2020, the Company had $41.7 million in letters of credit outstanding and $518.3 million of borrowings available under the revolving commitments. The Company intends to use the cash drawn for general corporate purposes. The Company utilizes letters of credit to back certain payment and performance obligations.

Subsequent Event - Issuance of Senior Secured Notes due 2025 – On April 8, 2020, the Company entered into a purchase agreement in connection with a private offering of $1,100 million in aggregate principal amount of 8.00% Senior Secured Notes due 2025 (herein the "8.00% 2025 Notes") at an issue price of 100% of the principal amount. The 8.00% 2025 Notes were issued pursuant to an indenture, dated as of April 8, 2020, amongst TransDigm, as issuer, TransDigm Group, TransDigm UK and the other subsidiaries of TransDigm named therein, as guarantors. The 8.00% 2025 Notes are secured by a first-priority security interest in substantially all the assets of TransDigm, TransDigm Group, TransDigm UK and each other guarantor on an equal and ratable basis with any other existing and future senior secured debt, including indebtedness under the Company's senior secured credit facilities and the 2026 Secured Notes.

The 8.00% 2025 Notes bear interest at the rate of 8.00% per annum, which accrues from April 8, 2020 and is payable in arrears on April 1 and October 1 of each year, commencing on October 1, 2020. The 8.00% 2025 Notes mature on December 15, 2025, unless earlier redeemed or repurchased, and are subject to the terms and conditions set forth in the indenture.

The Company intends to use the net proceeds from the offering of the 8.00% 2025 Notes for general corporate purposes, including increasing its liquidity.

Subsequent Event - Issuance of New Senior Secured Notes due 2026 – On April 17, 2020, the Company entered into a purchase agreement in connection with a private offering of $400 million in aggregate principal amount of 6.25% Senior Secured Notes due 2026 (herein the "6.25% 2026 New Notes") at an issue price of 101% of the principal amount. The 6.25% 2026 New Notes are an additional issuance of the Company's existing 6.25% 2026 Senior Secured Notes, and were issued under the indenture dated as of February 13, 2019 pursuant to which the Company previously issued $4,000 million aggregate principal amount of 6.25% Senior Secured Notes due 2026. The 6.25% 2026 New Notes, together with the 6.25% 2026 Secured Notes, will be treated as a single class for all purposes under the indenture. The 6.25% 2026 New Notes will be of the same class and series as, and otherwise identical to, the 6.25% 2026 Secured Notes other than with respect to the date of issuance and issue price.

The 6.25% 2026 New Notes bear interest at a rate of 6.25% per annum, which accrues from March 15, 2020 and is payable semiannually in arrears on March 15th and September 15th of each year, commencing on September 15, 2020. The 6.25% 2026 New Notes mature on March 15, 2026, unless earlier redeemed or repurchased, and are subject to the terms and conditions set forth in the indenture.

The Company intends to use the net proceeds from the offering of the 6.25% 2026 New Notes for general corporate purposes, including increasing its liquidity.

Government Refundable Advances - Government refundable advances consist of payments received from the Canadian government to assist in research and development related to commercial aviation. The requirement to repay this advance is solely based on year-over-year commercial aviation revenue growth at CMC Electronics, which is a subsidiary of TransDigm. These obligations were assumed in connection with the Esterline acquisition and the balance was $26.7 million at March 28, 2020 and $39.2 million at September 30, 2019.

Obligations under Finance Leases - The Company leases certain buildings and equipment under finance leases. These obligations were assumed in connection with the Esterline acquisition and the present value of the minimum capital lease payments, net of the current portion, represents a balance of $57.5 million at March 28, 2020 and $49.9 million at September 30, 2019. Refer to Note 16, "Leases," for further disclosure on the Company's finance lease obligations.

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REVENUE

6 Months Ended

Mar. 28, 2020

Revenue Recognition [Abstract]

Revenue from Contract with Customer [Text Block]

REVENUE RECOGNITION

TransDigm's sales are concentrated in the aerospace industry. The Company’s customers include: distributors of aerospace components, commercial airlines, large commercial transport and regional and business aircraft OEMs, various armed forces of the United States and friendly foreign governments, defense OEMs, system suppliers, and various other industrial customers.

The majority of the Company's revenue is recorded at a point in time. Revenue is recognized from the sale of products when control transfers to the customer, which is demonstrated by our right to payment, a transfer of title, a transfer of the risk and rewards of ownership, or the customer acceptance, but most frequently upon shipment where the customer obtains physical possession of the goods.

In some contracts, control transfers to the customer over time, primarily in contracts where the customer is required to pay for the cost of both the finished and unfinished goods at the time of cancellation plus a reasonable profit relative to the work performed for products that were customized for the customer. Therefore, we recognize revenue over time for those agreements that have a right to margin and where the products being produced have no alternative use. 

Based on our production cycle, it is generally expected that goods related to the revenue will be shipped and billed within the current year. For revenue recognized over time, we estimate the amount of revenue attributable to a contract earned at a given point during the production cycle based on certain costs, such as materials and labor incurred to date, plus the expected profit, which is a cost-to-cost input method.

The Company’s payment terms vary by the type and location of the customer and the products or services offered. The Company does not offer any payment terms that would meet the requirements for consideration as a significant financing component.

Shipping and handling fees and costs incurred in connection with products sold are recorded in cost of sales in the condensed consolidated statements of income, and are not considered a performance obligation to our customers.

The Company pays sales commissions that relate to contracts for products or services that are satisfied at a point in time or over a period of one year or less and are expensed as incurred. These costs are reported as a component of selling and administrative expenses in the unaudited condensed consolidated statements of income.

Contract Assets and Liabilities - Contract assets reflect revenue recognized and performance obligations satisfied in advance of customer billing or reimbursable costs related to a specific contract. Contract liabilities relate to payments received in advance of the satisfaction of performance under the contract. We receive payments from customers based on the terms established in our contracts. The following table summarizes our contract assets and liabilities balances (in millions):

	March 28, 2020		September 30, 2019		Change
Contract assets, current (1)	$	40	$	44	$	(4	)
Contract assets, non-current (2)	6		7		(1		)
Total contract assets	46		51		(5		)
Contract liabilities, current (3)	21		18		3
Contract liabilities, non-current (4)	15		13		2
Total contract liabilities	36		31		5
Net contract assets	$	10	$	20	$	(10	)

⁽¹⁾  Included in prepaid expenses and other on the condensed consolidated balance sheets.

⁽²⁾  Included in other non-current assets on the condensed consolidated balance sheets.

⁽³⁾  Included in accrued liabilities on the condensed consolidated balance sheets.

⁽⁴⁾  Included in other non-current liabilities on the condensed consolidated balance sheets.

For the thirteen and twenty-six week periods ended March 28, 2020, the revenue recognized that was previously included in contract liabilities was not material.

Refer to Note 13, “Segments,” for disclosures related to the disaggregation of revenue.

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EARNINGS PER SHARE (TWO-CLASS METHOD) (Tables)

6 Months Ended

Mar. 28, 2020

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share (in millions, except per share data) using the two-class method:

	Thirteen Week Periods Ended					Twenty-Six Week Periods Ended
	March 28, 2020			March 30, 2019		March 28, 2020			March 30, 2019
Numerator for earnings per share:
Income from continuing operations	$	323		$	200	$	556		$	396
Less: Net income attributable to noncontrolling interests	—			—		(1		)	—
Net income from continuing operations attributable to TD Group	323			200		555			396
Less: Special dividends declared or paid on participating securities	—			—		(185		)	(24		)
	323			200		370			372
(Loss) income from discontinued operations, net of tax	(4		)	2		68			2
Net income applicable to TD Group common stockholders - basic and diluted	$	319		$	202	$	438		$	374
Denominator for basic and diluted earnings per share under the two-class method:
Weighted-average common shares outstanding	53.8			53.0		53.7			52.9
Vested options deemed participating securities	3.6			3.3		3.7			3.4
Total shares for basic and diluted earnings per share	57.4			56.3		57.4			56.3
Earnings per share from continuing operations - basic and diluted	$	5.63		$	3.56	$	6.45		$	6.61
(Loss) Earnings per share from discontinued operations - basic and diluted	(0.07		)	0.04		1.18			0.04
Earnings per share	$	5.56		$	3.60	$	7.63		$	6.65

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FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Mar. 28, 2020

Fair Value Disclosures [Abstract]

Carrying Amounts and Fair Values of Financial Instruments

The following summarizes the carrying amounts and fair values of financial instruments (in millions):

		March 28, 2020				September 30, 2019
	Level	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets:
Cash and cash equivalents	1	$	2,668	$	2,668	$	1,467	$	1,467
Interest rate cap agreements (1)	2	—		—		1		1
Liabilities:
Interest rate swap agreements (3)	2	38		38		13		13
Interest rate swap agreements (4)	2	329		329		202		202
Foreign currency forward exchange contracts and other (3)	2	10		10		6		6
Short-term borrowings - trade receivable securitization facility (5)	1	350		350		350		350
Long-term debt, including current portion:
Term loans (5)	2	7,427		6,158		7,449		7,478
Revolving credit facility (5)	2	200		200		—		—
6.00% 2022 Notes (5)	1	—		—		1,146		1,167
6.50% 2024 Notes (5)	1	1,195		1,110		1,194		1,239
6.50% 2025 Notes (5)	1	750		694		750		782
6.375% 2026 Notes (5)	1	944		884		943		999
6.875% 2026 Notes (5)	1	492		460		491		535
6.25% 2026 Notes (5)	1	3,947		3,980		3,942		4,290
7.50% 2027 Notes (5)	1	545		528		545		595
5.50% 2027 Notes (5)	1	2,627		2,385		—		—
Government Refundable Advances	2	27		27		39		39
Finance Lease Obligations	2	58		58		50		50

⁽¹⁾  Included in other non-current assets on the condensed consolidated balance sheets.

⁽²⁾  Included in prepaid expenses and other on the condensed consolidated balance sheets.

⁽³⁾  Included in accrued liabilities on the condensed consolidated balance sheets.

⁽⁴⁾  Included in other non-current liabilities on the condensed consolidated balance sheets.

⁽⁵⁾ 

The carrying amount of the debt instrument is presented net of debt issuance costs, premium and discount. Refer to Note 9, "Debt," for gross carrying amounts.

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ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)

6 Months Ended

Mar. 28, 2020

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Loss

The following table presents the components of accumulated other comprehensive (loss) income, net of taxes, for the twenty-six week period ended March 28, 2020 (in millions):

	Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges (1)			Defined benefit pension plan activity (2)			Currency translation adjustment			Total
Balance at September 30, 2019	$	(172	)	$	(40	)	$	(167	)	$	(379	)
Current-period other comprehensive (loss) income	(122		)	6			(8		)	(124		)
Balance at March 28, 2020	$	(294	)	$	(34	)	$	(175	)	$	(503	)

⁽¹⁾  Unrealized loss represents derivative instruments, net of taxes of $43 million and $19 million for the thirteen week periods ended March 28, 2020 and March 30, 2019, respectively, and $34 million and $41 million for the twenty-six week periods ended March 28, 2020 and March 30, 2019, respectively.

⁽²⁾ 

There were no material pension liability adjustments, net of taxes for the thirteen and twenty-six week periods ended March 28, 2020 and March 30, 2019

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

A summary of reclassifications out of accumulated other comprehensive (loss) income for the twenty-six week periods ended March 28, 2020 and March 30, 2019 is provided below (in millions):

	Amount reclassified
	Twenty-Six Week Periods Ended
Description of reclassifications out of accumulated other comprehensive (loss) income	March 28, 2020		March 30, 2019
Amortization from redesignated interest rate swap and cap agreements (1)	$	2	$	1
Losses from settlement of foreign currency forward exchange contracts (2)	—		1
Deferred tax benefit on reclassifications out of accumulated other comprehensive (loss) income	—		(1		)
Losses reclassified into earnings, net of tax	$	2	$	1

⁽¹⁾  This component of accumulated other comprehensive (loss) income is included in interest expense (see Note 12, “Derivatives and Hedging Activities,” for additional information).

⁽²⁾ 

This component of accumulated other comprehensive (loss) income is included in net sales (see Note 12, “Derivatives and Hedging Activities,” for additional information).