Oshkosh (OSK) 10-K 18 Nov 20 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2020	Nov. 11, 2020	Mar. 31, 2020
Cover [Abstract]
Entity Registrant Name	Oshkosh Corporation
Document Type	10-K
Trading Symbol	OSK
Current Fiscal Year End Date	--09-30
Entity Common Stock, Shares Outstanding		68,189,776
Amendment Flag	false
Entity Central Index Key	0000775158
Entity Filer Category	Large Accelerated Filer
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Security Exchange Name	NYSE
Title of 12(b) Security	Common Stock ($.01 par value)
Entity File Number	1-31371
Entity Incorporation, State or Country Code	WI
Entity Tax Identification Number	39-0520270
Entity Address, Address Line One	1917 Four Wheel Drive
Entity Address, City or Town	Oshkosh
Entity Address, State or Province	WI
Entity Address, Postal Zip Code	54902
City Area Code	920
Local Phone Number	502-3400
Document Annual Report	true
Document Transition Report	false
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Entity Public Float			$ 4,378,988,453
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE: Portions of the Proxy Statement for the 2020 Annual Meeting of Shareholders (to be filed with the Commission under Regulation 14A within 120 days after the end of the registrant’s fiscal year and, upon such filing, to be incorporated by reference into Part III).

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net sales		$ 6,856.8	$ 8,382	$ 7,705.5
Cost of sales		5,736.5	6,864.6	6,346.9
Gross income		1,120.3	1,517.4	1,358.6
Operating expenses:
Selling, general and administrative		620.6	683.5	664.3
Amortization of purchased intangibles		11	36.9	38.3
Total operating expenses		631.6	720.4	702.6
Operating income		488.7	797	656
Other income (expense):
Interest expense		(59.3)	(54.4)	(70.9)
Interest income		7.5	6.8	15.3
Miscellaneous, net	[1]	2.2	1.3	(5.8)
Income before income taxes and earnings (losses) of unconsolidated affiliates		439.1	750.7	594.6
Provision for income taxes		112.8	171.3	123.8
Income before earnings (losses) of unconsolidated affiliates		326.3	579.4	470.8
Equity in earnings (losses) of unconsolidated affiliates		(1.8)		1.1
Net income		$ 324.5	$ 579.4	$ 471.9
Earnings per share:
Basic		$ 4.76	$ 8.30	$ 6.38
Diluted		$ 4.72	$ 8.21	$ 6.29
[1]	Fiscal 2020 results include a $6.2 million gain from insurance proceeds in excess of property loss in the Commercial segment.

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 324.5	$ 579.4	$ 471.9
Other comprehensive income (loss), net of tax:
Employee pension and postretirement benefits	(26.5)	(49.4)	35.3
Currency translation adjustments	30.4	(36.3)	(17.6)
Change in fair value of derivative instruments	(0.7)		0.5
Total other comprehensive income (loss), net of tax	3.2	(85.7)	18.2
Comprehensive income	$ 327.7	$ 493.7	$ 490.1

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Current assets:
Cash and cash equivalents	$ 582.9	$ 448.4
Receivables, net	857.6	1,082.3
Unbilled receivables, net	483.6	549.5
Inventories, net	1,505.4	1,249.2
Other current assets	106.3	78.9
Total current assets	3,535.8	3,408.3
Property, plant and equipment, net	565.9	573.6
Goodwill	1,009.5	995.7
Purchased intangible assets, net	418.2	432.3
Other long-term assets	286.5	156.4
Total assets	5,815.9	5,566.3
Current liabilities:
Revolving credit facility and current maturities of long-term debt	5.2
Accounts payable	577.8	795.5
Customer advances	491.4	382
Payroll-related obligations	150.8	183.6
Income taxes payable	14.7	73.5
Other current liabilities	345.2	307.3
Total current liabilities	1,585.1	1,741.9
Long-term debt, less current maturities	817.9	819
Other long-term liabilities	562.2	405.6
Commitments and contingencies
Shareholders’ equity:
Preferred Stock ($.01 par value; 2,000,000 shares authorized; none issued and outstanding)
Common Stock ($.01 par value; 300,000,000 shares authorized; 75,101,465 shares issued)	0.7	0.7
Additional paid-in capital	800.9	808.5
Retained earnings	2,747.7	2,505
Accumulated other comprehensive loss	(198.4)	(201.6)
Common Stock in treasury, at cost (6,950,298 and 7,114,349 shares, respectively)	(500.2)	(512.8)
Total shareholders’ equity	2,850.7	2,599.8
Total liabilities and shareholders’ equity	$ 5,815.9	$ 5,566.3

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2020	Sep. 30, 2019
Stockholders Equity Number Of Shares Par Value And Other Disclosures [Abstract]
Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized	2,000,000	2,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized	300,000,000	300,000,000
Common Stock, shares issued	75,101,465	75,101,465
Common Stock in treasury, shares	6,950,298	7,114,349

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Revision of Prior Period, Accounting Standards Update, Adjustment	Common Stock	Common StockRevision of Prior Period, Accounting Standards Update, Adjustment	Additional Paid-In Capital	Additional Paid-In CapitalRevision of Prior Period, Accounting Standards Update, Adjustment	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment	Retained EarningsRevision of Prior Period, Accounting Standards Update, Adjustment	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss)Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)Revision of Prior Period, Accounting Standards Update, Adjustment	Common Stock in Treasury, at Cost	Common Stock in Treasury, at CostRevision of Prior Period, Accounting Standards Update, Adjustment
Balance at Sep. 30, 2017	$ 2,307.4			$ 0.9		$ 802.2		$ 2,399.8			$ (125)			$ (770.5)
Net income	471.9							471.9
Employee pension and postretirement benefits, net of tax	35.3										35.3
Currency translation adjustments	(17.6)										(17.6)
Cash dividends	(71.2)							(71.2)
Repurchases of Common Stock	(249.3)													(249.3)
Exercise of stock options	16.6					(5.1)								21.7
Stock-based compensation expense	26.7					26.7
Payment of stock-based restricted and performance shares						(9.4)								9.4
Shares tendered for taxes on stock-based compensation	(7.7)													(7.7)
Retirement of treasury stock				(0.2)				(792.6)						792.8
Other	1.4					0.4					0.5			0.5
Balance at Sep. 30, 2018	2,513.5		$ 2,497.6	0.7	$ 0.7	814.8	$ 814.8	2,007.9		$ 2,001.1	(106.8)		$ (115.9)	(203.1)	$ (203.1)
Balance (Accounting Standards Update 2014-09) at Sep. 30, 2018		$ (60.4)							$ (60.4)
Balance (Accounting Standards Update 2016-16) at Sep. 30, 2018		$ 44.5							44.5
Balance (Accounting Standards Update 2018-02) at Sep. 30, 2018									$ 9.1			$ (9.1)
Net income	579.4							579.4
Employee pension and postretirement benefits, net of tax	(49.4)										(49.4)
Currency translation adjustments	(36.3)										(36.3)
Cash dividends	(75.5)							(75.5)
Repurchases of Common Stock	(350.1)													(350.1)
Exercise of stock options	11.3					(10.4)								21.7
Stock-based compensation expense	29					29
Payment of stock-based restricted and performance shares						(24.6)								24.6
Shares tendered for taxes on stock-based compensation	(7.3)													(7.3)
Other	1.1					(0.3)								1.4
Balance at Sep. 30, 2019	2,599.8			0.7		808.5		2,505			(201.6)			(512.8)
Net income	324.5							324.5
Employee pension and postretirement benefits, net of tax	(26.5)										(26.5)
Currency translation adjustments	30.4										30.4
Cash dividends	(81.8)							(81.8)
Repurchases of Common Stock	(40.8)													(40.8)
Exercise of stock options	26.1					(11.6)								37.7
Stock-based compensation expense	29.3					29.3
Payment of stock-based restricted and performance shares						(23)								23
Shares tendered for taxes on stock-based compensation	(10.7)													(10.7)
Other	0.4					(2.3)					(0.7)			3.4
Balance at Sep. 30, 2020	$ 2,850.7			$ 0.7		$ 800.9		$ 2,747.7			$ (198.4)			$ (500.2)

CONSOLIDATED STATEMENTS OF SH_2

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Statement Of Stockholders Equity [Abstract]
Employee pension and postretirement benefits, tax	$ 8.6	$ 14.9	$ 10.6
Cash dividends declared per share on common stock (in dollars per share)	$ 1.20	$ 1.08	$ 0.96

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net income	$ 324.5	$ 579.4	$ 471.9
Depreciation and amortization	104.2	115.2	120.5
Stock-based compensation expense	29.3	29	26.7
Deferred income taxes	22.4	10.4	(3.1)
(Gain) loss on sale of assets	(11.8)	(3.3)	1.1
Foreign currency transaction (gains) losses	(0.6)	0.8	1.4
Debt extinguishment	8.5		10.3
Other non-cash adjustments	(0.6)	0.3	2.3
Changes in operating assets and liabilities:
Receivables, net	266.7	173.2	(129.5)
Unbilled receivables, net	65.8	(239.8)	(97.5)
Inventories, net	(246.7)	(111)	(38.6)
Other current assets	(17.4)	(5.8)	11.2
Accounts payable	(222.5)	12.8	124.3
Customer advances	112.3	(90.2)	(68.4)
Payroll-related obligations	(32.3)	(7.6)	1.7
Income taxes payable	(52.1)	36.2	26.2
Other current liabilities	(37.1)	45.6	(33.9)
Other long-term assets and liabilities	14.7	23.1	9.7
Total changes in operating assets and liabilities	(148.6)	(163.5)	(194.8)
Net cash provided by operating activities	327.3	568.3	436.3
Investing activities:
Additions to property, plant and equipment	(112.3)	(147.6)	(95.3)
Additions to equipment held for rental	(17.9)	(26.6)	(4.8)
Proceeds from sale of property, plant and equipment	2.4	3.1	5.7
Proceeds from sale of equipment held for rental	38.8	12	5.8
Other investing activities	11.4	6.1	(1.8)
Net cash used by investing activities	(77.6)	(153)	(90.4)
Financing activities:
Proceeds from issuance of debt (original maturities greater than three months)	303.9		639.4
Repayments of debt (original maturities greater than three months)	(300)		(653.8)
Debt issuance costs	(9.6)		(12.9)
Repurchases of Common Stock	(51.5)	(357.4)	(257)
Dividends paid	(81.8)	(75.5)	(71.2)
Proceeds from exercise of stock options	26.1	11.3	16.6
Other financing activities	(2.6)
Net cash used by financing activities	(115.5)	(421.6)	(338.9)
Effect of exchange rate changes on cash	0.3	0.1	0.6
Increase (decrease) in cash and cash equivalents	134.5	(6.2)	7.6
Cash and cash equivalents at beginning of year	448.4	454.6	447
Cash and cash equivalents at end of year	582.9	448.4	454.6
Supplemental disclosures:
Cash paid for interest	55.9	53.6	55.7
Cash paid for income taxes	157.2	$ 117.6	$ 100.3
Cash paid for operating lease liabilities	55.8
Operating right-of-use assets obtained	$ 23.3

Nature of Operations

Nature of Operations	12 Months Ended
	Sep. 30, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Operations	1. Nature of Operations Oshkosh Corporation and its subsidiaries (the “Company”) are leading designers and manufacturers of a wide variety of essential specialty vehicles and vehicle bodies for the Americas and global markets. “Oshkosh” refers to Oshkosh Corporation, not including its subsidiaries. The Company sells its products into four principal markets — access equipment, defense, fire & emergency and commercial. The access equipment business is conducted through its wholly-owned subsidiary, JLG Industries, Inc. and its wholly-owned subsidiaries (JLG) and JerrDan Corporation (JerrDan). The Company’s defense business is conducted principally through its wholly-owned subsidiary, Oshkosh Defense, LLC and its wholly-owned subsidiary (Oshkosh Defense). The Company’s fire & emergency business is principally conducted through its wholly-owned subsidiaries Pierce Manufacturing Inc. (Pierce), Oshkosh Airport Products, LLC (Airport Products) and Kewaunee Fabrications, LLC (Kewaunee). The Company’s commercial business is principally conducted through its wholly-owned subsidiaries, McNeilus Companies, Inc. (McNeilus), London Machinery Inc. and its wholly-owned subsidiary (London), Iowa Mold Tooling Co., Inc. (IMT) and Oshkosh Commercial Products, LLC (Oshkosh Commercial). On July 20, 2020, the Company sold its interest in Concrete Equipment Company, Inc. and its wholly-owned subsidiary (CON-E-CO) to Astec, Inc. CON-E-CO’s results are included in the Commercial segment up to the date of sale.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Principles of Consolidation and Presentation — The consolidated financial statements include the accounts of Oshkosh and all of its majority-owned or controlled subsidiaries and are prepared in conformity with generally accepted accounting principles in the United States of America (U.S. GAAP). All intercompany accounts and transactions have been eliminated in consolidation. Use of Estimates — The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Revenue Recognition — The Company recognizes revenue in accordance with Accounting Standards Codification (ASC) Topic 606, . Accordingly, revenue is recognized when control of the goods or services promised under a contract are transferred to the customer in an amount that reflects the consideration to which the Company expects to be entitled in exchange for the goods or services. The Company has elected to apply the following practical expedients and accounting policy elections when determining revenue from contracts with customers and capitalization of related costs: • Shipping and handling costs incurred after control of the related product has transferred to the customer are considered costs to fulfill the related promise and are included in “Cost of Sales” in the Consolidated Statements of Income when incurred or when the related product revenue is recognized, whichever is earlier. • Except for the Fire & Emergency segment, the Company has elected to not adjust revenue for the effects of a significant finance component when the timing difference between receipt of payment and recognition of revenue is less than one year. • Sales and similar taxes that are collected from customers are excluded from the transaction price. • The Company has elected to expense incremental costs to obtain a contract when the amortization period of the related asset is expected to be less than one year. See Note 3 of the Notes to Consolidated Financial Statements for information regarding the Company’s revenue recognition practices. Assurance Warranty — Provisions for estimated assurance warranties are recorded in cost of sales at the time of sale and are periodically adjusted to reflect actual experience. The amount of warranty liability accrued reflects management’s best estimate of the expected future cost of honoring Company obligations under the warranty plans. Historically, the cost of fulfilling the Company’s warranty obligations has principally involved replacement parts, labor and sometimes travel for any field retrofit campaigns. The Company’s estimates are based on historical experience, the extent of pre-production testing, the number of units involved and the extent of features/components included in product models. Also, each quarter, the Company reviews actual warranty claims experience to determine if there are systemic defects that would require a field campaign. Research and Development and Similar Costs — Except for customer sponsored research and development costs incurred pursuant to contracts (generally with the U.S. Department of Defense (DoD)), research and development costs are expensed as incurred and included in cost of sales. Research and development costs charged to expense totaled $103.9 million, $99.0 million and $99.3 million during fiscal 2020, 2019 and 2018, respectively. Customer sponsored research and development costs incurred pursuant to contracts are accounted for as contract costs. Advertising — Advertising costs are included in selling, general and administrative expense and are expensed as incurred. These expenses totaled $16.0 million, $24.9 million and $21.1 million in fiscal 2020, 2019 and 2018, respectively Stock-Based Compensation — The Company recognizes stock-based compensation using the fair value provisions prescribed by ASC Topic 718, . Accordingly, compensation costs for awards of stock-based compensation settled in shares are determined based on the fair value of the share-based instrument at the time of grant and are recognized as expense over the vesting period of the share-based instrument, net of estimated forfeitures. See Note 4 of the Notes to Consolidated Financial Statements for information regarding the Company’s stock-based incentive plans. Debt Financing Costs — Debt issuance costs on term debt are amortized using the interest method over the term of the debt. Deferred financing costs on lines of credit are amortized on a straight-line basis over the term of the related lines of credit. Amortization expense was $3.6 million (including $1.8 million of amortization related to early debt retirement), $1.6 million and $5.6 million (including $3.2 million of amortization related to early debt retirement) in fiscal 2020, 2019 and 2018, respectively Income Taxes — Deferred income taxes are provided to recognize temporary differences between the financial reporting basis and the income tax basis of the Company’s assets and liabilities using currently enacted tax rates and laws. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning strategies in making this assessment. The Company evaluates uncertain income tax positions in a two-step process. The first step is recognition, where the Company evaluates whether an individual tax position has a likelihood of greater than 50% of being sustained upon examination based on the technical merits of the position, including resolution of any related appeals or litigation processes. For tax positions that are currently estimated to have a less than 50% likelihood of being sustained, zero tax benefit is recorded. For tax positions that have met the recognition threshold in the first step, the Company performs the second step of measuring the benefit to be recorded. The actual benefits ultimately realized may differ from the Company’s estimates. In future periods, changes in facts and circumstances and new information may require the Company to change the recognition and measurement estimates with regard to individual tax positions. Changes in recognition and measurement estimates are recorded in results of operations and financial position in the period in which such changes occur. Fair Value of Financial Instruments — Based on Company estimates, the carrying amounts of cash equivalents, receivables, unbilled receivables, accounts payable and accrued liabilities approximated fair value as of September 30, 2020 and 2019. See Notes 5, 14, 21 and 22 of the Notes to Consolidated Financial Statements for additional fair value information. Cash and Cash Equivalents — The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. Cash equivalents at September 30, 2020 consisted principally of bank deposits and money market instruments Receivables — Receivables consist of amounts billed and currently due from customers. The Company extends credit to customers in the normal course of business and maintains an allowance for estimated losses resulting from the inability or unwillingness of customers to make required payments. The accrual for estimated losses is based on the Company’s historical experience, existing economic conditions and any specific customer collection issues the Company has identified. Account balances are charged against the allowance when the Company determines it is probable the receivable will not be recovered. Unbilled Receivables — Unbilled receivables consist of unbilled costs and accrued profits related to revenues on contracts with customers that have been recognized for accounting purposes but not yet billed to customers. In the Company’s Defense segment, amounts are billed as work progresses in accordance with agreed-upon contractual terms, either upon achievement of contractual milestones (e.g. acceptance of the vehicle) or at periodic intervals (e.g., biweekly or monthly). Generally, billing occurs subsequent to revenue recognition, resulting in unbilled receivables (contract assets). Concentration of Credit Risk — Financial instruments that potentially subject the Company to significant concentrations of credit risk consist principally of cash equivalents, trade accounts receivable, unbilled receivables and guarantees of certain customers’ obligations under deferred payment contracts and lease purchase agreements. The Company maintains cash and cash equivalents, and other financial instruments, with various major financial institutions. The Company performs periodic evaluations of the relative credit standing of these financial institutions and limits the amount of credit exposure with any institution. Concentration of credit risk with respect to trade accounts and lease receivables is limited due to the large number of customers and their dispersion across many geographic areas. However, a significant amount of trade and lease receivables are with the U.S. government, with rental companies globally, with companies in the ready-mix concrete industry, with municipalities and with several large waste haulers in the United States. The Company continues to monitor credit risk associated with its trade receivables. Inventories — Inventories are stated at the lower of cost or market. Cost has been determined using the last-in, first-out (LIFO) method for 83% and 84% of the Company’s inventories at September 30, 2020 and 2019, respectively. For the remaining inventories, cost has been determined using the first-in, first-out (FIFO) method Property, Plant and Equipment — Property, plant and equipment are recorded at cost. Depreciation expense is recognized over the estimated useful lives of the respective assets using straight-line and accelerated methods. The estimated useful lives range from ten to forty years four to twenty-five years three to ten years Goodwill — Goodwill reflects the cost of an acquisition in excess of the aggregate fair value assigned to identifiable net assets acquired. Goodwill is not amortized; however, it is assessed for impairment at least annually and as triggering events or “indicators of potential impairment” occur. The Company performs its annual impairment test as of July 1 of each fiscal year. The Company evaluates the recoverability of goodwill by estimating the fair value of the businesses to which the goodwill relates. Estimated cash flows and related goodwill are grouped at the reporting unit level. A reporting unit is an operating segment or, under certain circumstances, a component of an operating segment. When the fair value of the reporting unit is less than the carrying value of the reporting unit, a further analysis is performed to measure and recognize the amount of the impairment loss, if any. Impairment losses, limited to the carrying value of goodwill, represent the excess of the carrying amount of a reporting unit’s goodwill over the implied fair value of that goodwill. In evaluating the recoverability of goodwill, it is necessary to estimate the fair value of the reporting units. The Company evaluates the recoverability of goodwill utilizing the income approach and the market approach. The Company weighted the income approach more heavily (75%) as the Company believes the income approach more accurately considers long-term fluctuations in the U.S. and European construction markets than the market approach. Under the income approach, the Company determines fair value based on estimated future cash flows discounted by an estimated weighted-average cost of capital, which reflects the overall level of inherent risk of a reporting unit and the rate of return an outside investor would expect to earn. Estimated future cash flows are based on the Company’s internal projection models, industry projections and other assumptions deemed reasonable by management. Rates used to discount estimated cash flows correspond to the Company’s cost of capital, adjusted for risk where appropriate, and are dependent upon interest rates at a point in time. There are inherent uncertainties related to these factors and management’s judgment in applying them to the analysis of goodwill impairment. Under the market approach, the Company derives the fair value of its reporting units based on revenue and earnings multiples of comparable publicly-traded companies. It is possible that assumptions underlying the impairment analysis will change in such a manner that impairment in value may occur in the future . See Note 11 of the Notes to Consolidated Financial Statements for information regarding the Company’s annual impairment testing . Impairment of Long-Lived Assets — Property, plant and equipment, right-of-use (“ROU”) lease assets and amortizable intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. If the sum of the expected undiscounted cash flows is less than the carrying value of the related asset or group of assets, a loss is recognized for the difference between the fair value and carrying value of the asset or group of assets. Non-amortizable trade names are assessed for impairment at least annually and as triggering events or “indicators of potential impairment” occur. The Company performs its annual impairment test in the fourth quarter of its fiscal year. The Company evaluates the potential impairment by estimating the fair value of the non-amortizing intangible assets using the “relief from royalty” method. When the fair value of the non-amortizable trade name is less than the carrying value of the trade name, a further analysis is performed to measure and recognize the amount of the impairment loss, if any. Impairment losses, limited to the carrying value of the non-amortizable trade name, represent the excess of the carrying amount over the implied fair value of that non-amortizable trade name. Customer Advances — Customer advances include amounts received in advance of the completion of vehicles in the Fire & Emergency and Commercial segments. Most of these advances bear interest at fixed rates that approximate the prime rate at the time of the advance. Other Long-Term Liabilities — Other long-term liabilities are comprised principally of the portions of the Company’s pension liability, other post-employment benefit liability, tax liability, accrued warranty, accrued product liability and lease liabilities that are not expected to be settled in the subsequent twelve month period. Foreign Currency Translation — All balance sheet accounts have been translated into U.S. dollars using the exchange rates in effect at the balance sheet date. Income statement amounts have been translated using the average exchange rate during the period in which the transactions occurred. Resulting translation adjustments are included in “Accumulated other comprehensive loss.” Foreign currency transaction gains or losses are included in “Miscellaneous, net” in the Consolidated Statements of Income. The Company recorded a net foreign currency transaction loss of $2.7 million in fiscal 2020, a net foreign currency transaction gain of $2.1 million in fiscal 2019 and a net foreign currency transaction loss of $3.8 million in fiscal 2018 Derivative Financial Instruments — The Company recognizes all derivative financial instruments, such as foreign exchange contracts, in the consolidated financial statements at fair value regardless of the purpose or intent for holding the instrument. Changes in the fair value of derivative financial instruments are either recognized periodically in income or in equity as a component of comprehensive income depending on whether the derivative financial instrument qualifies for hedge accounting, and if so, whether it qualifies as a fair value hedge or cash flow hedge. Generally, changes in fair values of derivatives accounted for as fair value hedges are recorded in income along with the portions of the changes in the fair values of the hedged items that relate to the hedged risks. Changes in fair values of derivatives accounted for as cash flow hedges, to the extent they are effective as hedges, are recorded in other comprehensive income, net of deferred income taxes. Changes in fair value of derivatives not qualifying as hedges are reported in income. Cash flows from derivatives that are accounted for as cash flow or fair value hedges are included in the Consolidated Statements of Cash Flows in the same category as the item being hedged. Recent Accounting Pronouncements — In February 2016, the Financial Accounting Standards Board (FASB) issued , which requires lessees to reflect most leases on their balance sheet as lease liabilities with corresponding ROU assets, while leaving presentation of lease expense in the statement of income largely unchanged. ROU assets represent the Company’s right to use an underlying asset during the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. The Company adopted the new standard on October 1, 2019 following the modified retrospective method of transition. Prior period comparative information was not recast to reflect the impact of the new standard and therefore continues to be reported under the accounting guidance in effect during those periods . The new standard provided a number of optional practical expedients for transition. The Company elected to adopt the standard using the package of practical expedients, which allowed the Company not to reassess prior conclusions about lease identification, lease classification and initial direct costs. In addition, the new standard provides practical expedients for an entity’s ongoing lessee accounting. The Company has elected not to separate payments for lease components from payments for non-lease components for any classes of assets. The Company has elected the short-term lease recognition exemption for all leases that qualify, which means ROU assets and lease liabilities are not recognized for leases with an initial term of twelve months or less. The most significant quantitative effect of adoption relates to the recognition of ROU assets and lease liabilities on the balance sheet for operating leases. The adoption did not have a material impact on the Company’s results of operations or cash flows. The cumulative effect of initially applying the new leasing standard to the Company’s Consolidated Financial Statements as of October 1, 2019 was as follows (in millions): Balance as of September 30, 2019 Cumulative Impact from Adopting New Lease Standard Balance as of October 1, 2019 Assets Other current assets $ 78.9 $ (0.5 ) $ 78.4 Total current assets 3,408.3 (0.5 ) 3,407.8 Other long-term assets 156.4 179.5 335.9 Total assets 5,566.3 179.0 5,745.3 Liabilities and Shareholders’ Equity Other current liabilities $ 307.3 $ 46.4 $ 353.7 Total current liabilities 1,741.9 46.4 1,788.3 Other long-term liabilities 405.6 132.6 538.2 Total liabilities and shareholders’ equity 5,566.3 179.0 5,745.3 See Note 12 of the Notes to Consolidated Financial Statements for additional information regarding the Company’s accounting for leases. Standards not yet adopted In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350), Simplifying the Test for Goodwill Impairment . The standard simplifies the measurement of goodwill impairment by eliminating the requirement that an entity compute the implied fair value of goodwill based on the fair values of its assets and liabilities to measure impairment. Instead, goodwill impairment will be measured as the difference between the fair value of the reporting unit and the carrying value of the reporting unit. The standard also clarifies the treatment of the income tax effect of tax - deductible goodwill when measuring goodwill impairment loss. The Company adopt ed ASU 2017-04 on October 1, 2020. The adoption of ASU 2017-04 did not have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes

Revenue Recognition

Revenue Recognition	12 Months Ended
	Sep. 30, 2020
Sales And Revenue Recognition [Abstract]
Revenue Recognition	3. Revenue Recognition Prior to fiscal 2019, the Company recognized revenue in accordance with ASC 605, Revenue Recognition. Sales to the U.S. government of non-commercial products manufactured to the government’s specifications were recognized under percentage-of-completion accounting using either the units-of-delivery method or cost-to-cost method to measure contract performance. Under the units-of-delivery method, the Company recorded sales as units were accepted by the DoD, generally based on unit sales values stated in the respective contracts. Costs of sales were based on actual costs incurred to produce the units delivered under the contract. Under the cost-to-cost method, sales and estimated margins were recognized as contract costs are incurred. The measurement method selected was generally determined based on the nature of the contract. The Company included amounts representing contract change orders, claims or other items in sales only when they were reliably estimated and realization was probable. Bid and proposal costs were expensed as incurred. The Company charged anticipated losses on contracts or programs in progress to earnings when identified. In fiscal 2019 and fiscal 2020, the Company recognized revenue in accordance with ASC 606. Accordingly, revenue is recognized when control of the goods or services promised under a contract is transferred to the customer either at a point in time (e.g., upon delivery) or over time (e.g., as the Company performs under the contract) in an amount that reflects the consideration to which the Company expects to be entitled in exchange for the goods or services. The Company accounts for a contract when it has approval and commitment from both parties, the rights and payment terms of the parties are identified, the contract has commercial substance and collectability of consideration is probable. If collectability is not probable, the sale is deferred until collection becomes probable or payment is received. Contracts are reviewed to determine whether there is one or multiple performance obligations. A performance obligation is a promise to transfer a distinct good or service to a customer and represents the unit of accounting for revenue recognition. For contracts with multiple performance obligations, the expected consideration (e.g., the transaction price) is allocated to each performance obligation identified in the contract based on the relative standalone selling price of each performance obligation, which is determinable based on observable standalone selling prices or is estimated using an expected cost plus a margin approach. Revenue is then recognized for the transaction price allocated to the performance obligation when control of the promised goods or services underlying the performance obligation is transferred. When the amount of consideration allocated to a performance obligation through this process differs from the invoiced amount, it results in a contract asset or liability. The identification of performance obligations within a contract requires significant judgment. The following is a description of the primary activities from which the Company generates revenue. Access Equipment, Fire & Emergency and Commercial segments revenue The Company derives revenue in the Access Equipment, Fire & Emergency and Commercial segments (non-defense segments) through the sale of machinery, vehicles and related aftermarket parts and services. Customers include distributors and end-users. Contracts with customers generally exist upon the approval of a quote and/or purchase order by the Company and customer. Each contract is also assessed at inception to determine whether it is necessary to combine the contract with other contracts. The Company’s non-defense segments offer various customer incentives within contracts, such as sales and marketing rebates, volume discounts and interest subsidies, some of which are variable and therefore must be estimated by the Company. Transaction prices may also be impacted by rights of return, primarily within the aftermarket parts business, which requires the Company to record a liability and asset representing its rights and obligations in the event a return occurs. The estimated return liability is based on historical experience rates. Revenue for performance obligations consisting of machinery, vehicle and after-market parts (together, “product”) is recognized when the customer obtains control of the product, which typically occurs at a point in time, based on the shipping terms within the contract. In the Commercial segment, refuse collection and concrete mixer products are sold on both Company owned chassis and customer owned chassis. When performing work on a customer owned chassis, revenue is recognized over time based on the cost-to-cost method, as the Company is enhancing a customer owned asset. All non-defense segments offer aftermarket services related to their respective products such as repair, refurbishment and maintenance (together, “services”). The Company generally recognizes revenue on service performance obligations over time using the method that results in the most faithful depiction of transfer of control to the customer. Non-defense segments also offer extended warranty coverage as an option on most products. The Company considers extended warranties to be service-type warranties and therefore a performance obligation. Service-type warranties differ from the Company’s standard, or assurance-type warranties, as they are generally separately priced and negotiated as part of the contract and/or provide additional coverage beyond what the customer or customer group that purchases the product would receive under an assurance-type warranty. The Company has concluded that its extended warranties are stand-ready obligations to perform and therefore recognizes revenue ratably over the coverage period. The Company also provides a standard warranty on its products and services at no additional cost to its customers in most instances. See Note 15 of the Notes to Consolidated Financial Statements for further discussion on product assurance warranties. Defense segment revenue The majority of the Company’s Defense segment net sales are derived through long-term contracts with the U.S. government to design, develop, manufacture or modify defense products. These contracts, which also include those under the U.S. Government-sponsored Foreign Military Sales (FMS) program, accounted for approximately 98% of Defense segment revenue in fiscal 2020. Contracts with Defense segment customers are generally fixed-price or cost-reimbursement type contracts. Under fixed-price contracts, the price paid to the Company is generally not adjusted to reflect the Company’s actual costs except for costs incurred as a result of contract modifications. Certain fixed-price contracts include an incentive component under which the price paid to the Company is subject to adjustment based on the actual costs incurred. Under cost-reimbursement contracts, the price paid to the Company is determined based on the allowable costs incurred to perform plus a fee. The fee component of cost-reimbursement contracts can be fixed based on negotiations at contract inception or can vary based on performance against target costs established at the time of contract inception. The Company also designs, develops, manufactures or modifies defense products for international customers through Direct Commercial Sale contracts. The Defense segment supports its products through the sale of aftermarket parts and services. Aftermarket contracts can range from long-term supply agreements to ad hoc purchase orders for replacement parts. The Company evaluates Defense segment contracts at inception to identify performance obligations. The goods and services in Defense segment contracts are typically not distinct from one another as they are generally customized and have complex inter-relationships and the Company is responsible for overall management of the contract. As a result, Defense segment contracts are typically accounted for as a single performance obligation. The Defense segment provides standard warranties for its products for periods that typically range from one to two years. These assurance-type warranties typically cannot be purchased separately and do not meet the criteria to be considered a performance obligation. See Note 15 of the Notes to Consolidated Financial Statements for further discussion on product assurance warranties. The Company determines the transaction price for each contract at inception based on the consideration that it expects to receive for the goods and services promised under the contract. This determination is made based on the Company’s current rights, excluding the impact of any subsequent contract modifications (including unexercised options) until they become legally enforceable. Contract modifications frequently occur within the Defense segment. The Company evaluates each modification to identify changes that impact price or scope of its contracts, which are then assessed to determine if the modification should be accounted for as an adjustment to an existing contract or as a separate contract. Contract modifications within the Defense segment are generally accounted for as a cumulative effect adjustment to existing contracts as they are not distinct from the goods and services within the existing contract. For Defense segment contracts that include a variable component of the sale price, the Company estimates variable consideration. Variable consideration is included within the contract’s transaction price to the extent it is probable that a significant reversal of revenue will not occur. The Company evaluates its estimates of variable consideration on an ongoing basis and any adjustments are accounted for as changes in estimates in the period identified. Common forms of variable consideration within Defense segment contracts include cost reimbursement contracts that contain incentives, customer reimbursement rights and regulatory or customer negotiated penalties tied to contract performance. The Company recognizes revenue on Defense segment contracts as performance obligations are satisfied and control of the underlying goods and services is transferred to the customer. In making this evaluation, the Defense segment considers contract terms, payment terms and whether there is an alternative future use for the good or service. Through this process the Company has concluded that substantially all of the Defense segment’s performance obligations, including a majority of performance obligations for aftermarket goods and services, transfer to the customer continuously during the contract term and therefore revenue is recognized over time. For U.S. government and FMS program contracts, this determination is supported by the inclusion of clauses within contracts that allow the customer to terminate a contract at its convenience. When the clause is present, the Company is entitled to compensation for the work performed through the date of notification at a price that reflects actual costs plus a reasonable margin in exchange for transferring its work in process to the customer. For contracts that do not contain termination for convenience provisions, the Company is generally able to support the continuous transfer of control determination as a result of the customized nature of its goods and services and contractual rights. The Defense segment recognizes revenue on its performance obligations that are satisfied over time by measuring progress using the cost-to-cost method of percentage-of-completion because it best depicts the transfer of control to the customer. Under the cost-to-cost method of percentage-of-completion, the Defense segment measures progress based on the ratio of costs incurred to date to total estimated costs for the performance obligation. The Company recognizes changes in estimated sales or costs and the resulting profit or loss on a cumulative basis. Cumulative estimate-at-completion adjustments represent the cumulative effect of the changes on prior periods. If a loss is expected on a performance obligation, the complete estimated loss is recorded in the period in which the loss is identified. For contracts with only aftermarket parts performance obligations, revenue is recognized at the time the parts are physically committed to the order or based on shipping terms, depending on whether the contracts contain a termination for convenience clause. For performance obligations consisting solely of services, revenue is recognized either by using the cost-to-cost method of percentage-of-completion method or as the Company has the right to bill the customer in instances that billing rights approximate timing of transfer of control to the customer. There is significant judgment involved in estimating sales and costs within the Defense segment. Each contract is evaluated at contract inception to identify risks and estimate revenue and costs. In performing this evaluation, the Defense segment considers risks of contract performance such as technical requirements, schedule, duration and key contract dependencies. These considerations are then factored into the Company’s estimated revenue and costs. Preliminary contract estimates are subject to change throughout the duration of the contract as additional information becomes available that impacts risks and estimated revenue and costs. In addition, as contract modifications (e.g., new orders) are received, the additional units are factored into the overall contract estimate of costs and transaction price . Contract adjustments resulted in changes within the Defense segment as follows (in millions, except for per share amounts): Fiscal Year Ended September 30, 2020 2019 2018 Net sales $ 31.2 $ 63.9 $ 2.2 Operating income 16.2 44.7 2.2 Net income 12.4 34.5 1.7 Diluted earnings per share 0.18 0.49 0.02 Disaggregation of Revenue The table below presents consolidated net sales disaggregated by segment and timing of revenue recognition (in millions): Fiscal Year Ended September 30, 2020 Access Equipment Defense Fire & Emergency Commercial Corporate and Intersegment Eliminations Total Point in time $ 2,437.5 $ 6.8 $ 1,103.9 $ 556.7 $ (26.8 ) $ 4,078.1 Over time 77.6 2,255.4 43.2 401.1 1.4 2,778.7 $ 2,515.1 $ 2,262.2 $ 1,147.1 $ 957.8 $ (25.4 ) $ 6,856.8 Fiscal Year Ended September 30, 2019 Access Equipment Defense Fire & Emergency Commercial Corporate and Intersegment Eliminations Total Point in time $ 4,001.6 $ 7.4 $ 1,220.5 $ 591.7 $ (20.1 ) $ 5,801.1 Over time 78.1 2,024.7 45.6 430.5 2.0 2,580.9 $ 4,079.7 $ 2,032.1 $ 1,266.1 $ 1,022.2 $ (18.1 ) $ 8,382.0 See Note 23 of the Notes to Consolidated Financial Statements for further disaggregated sales information. Contract Assets and Contract Liabilities The Company is generally entitled to bill its customers upon satisfaction of its performance obligations, with the exception of its long-term contracts in the Defense segment which typically allow for billing upon acceptance of the finished good, payments received from customers received in advance of performance, primarily within the Fire & Emergency segment, and extended warranties that are usually billed in advance of the warranty coverage period. Customer payment is usually received shortly after billing and payment terms generally do not exceed one year. See Note 8 of the Notes to Consolidated Financial Statements for additional information on the Company’s receivable balances. With the exception of the Fire & Emergency segment, the Company’s contracts typically do not contain a significant financing component. In the Fire & Emergency segment, customers earn interest on customer advances at a rate determined in a separate financing transaction between the Fire & Emergency segment and the customer at contract inception. Interest due on customer advances of $15.6 million, $14.5 million and $18.1 million was recorded in “Interest expense” in the Consolidated Statements of Income for fiscal 2020, 2019 and 2018, respectively. The timing of billing does not always match the timing of revenue recognition. In instances where a customer pays consideration in advance or when the Company is entitled to bill a customer in advance of recognizing the related revenue , t he Company reduces contract liabilities when revenue is recognized. Contract liabilities consisted of the following (in millions): September 30, 2020 2019 Customer advances $ 491.4 $ 382.0 Other current liabilities 59.5 78.2 Other long-term liabilities 53.7 52.3 Total contract liabilities $ 604.6 $ 512.5 Fiscal Year Ended September 30, 2020 2019 Beginning liabilities recognized in revenue $ 441.0 $ 530.9 In instances where the Company recognizes revenue prior to having an unconditional right to payment, the Company records a contract asset within “Unbilled receivables, net” in the Consolidated Balance Sheet. The Company reduces contract assets when the Company has an unconditional right to payment. The Company periodically assesses its contract assets for impairment. Contract assets and liabilities are determined on a net basis for each contract. The Company did not record any impairment losses on contract assets during fiscal 2020 or 2019. The Company offers a variety of service-type warranties, including optionally priced extended warranty programs. Outstanding balances related to service-type warranties are included within contract liabilities disclosed above. Revenue related to service-type warranties is deferred until after the expiration of the standard warranty period. The revenue is then recognized in income over the term of the extended warranty period in proportion to the costs that are expected to be incurred. Changes in the Company’s service-type warranties were as follows (in millions): Fiscal Year Ended September 30, 2020 2019 Balance at beginning of period $ 68.2 $ 30.7 Adoption of ASC 606 — 35.7 Deferred revenue for new service-type warranties 23.6 27.5 Amortization of deferred revenue (27.9 ) (25.2 ) Foreign currency translation 0.5 (0.5 ) Balance at end of period $ 64.4 $ 68.2 Classification of service-type warranties in the Consolidated Balance Sheets consisted of the following (in millions): September 30, 2020 2019 Other current liabilities $ 24.7 $ 27.8 Other long-term liabilities 39.7 40.4 $ 64.4 $ 68.2 Remaining Performance Obligations As of September 30, 2020, the Company had unsatisfied performance obligations for contracts with an original duration greater than one year totaling $3.9 billion, of which $3.1 billion is expected to be satisfied and revenue recognized in fiscal 2021, $649.1 million is expected to be satisfied and revenue recognized in fiscal 2022 and $159.6 million is expected to be satisfied and revenue recognized beyond fiscal 2022. The Company has elected the practical expedient to not disclose unsatisfied performance obligations with an original contract duration of one year or less.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Sep. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	4. Stock-Based Compensation In February 2017, the Company’s shareholders approved the 2017 Incentive Stock and Awards Plan (the “2017 Stock Plan”). The 2017 Stock Plan replaced the 2009 Incentive Stock and Awards Plan (as amended, the “2009 Stock Plan”). While no new awards will be granted under the 2009 Stock Plan, awards previously made under the 2009 Stock Plan plans that were outstanding as of the approval date of the 2017 Stock Plan will remain outstanding and continue to be governed by the provisions of that plan. At September 30, 2020, the Company had reserved 5,771,194 shares of Common Stock available for issuance to provide for the exercise of outstanding stock options and the issuance of Common Stock under incentive compensation awards, including awards issued prior to the effective date of the 2017 Stock Plan. Under the 2017 Stock Plan, officers, directors, including non-employee directors, and employees of the Company may be granted stock options, stock appreciation rights (SAR), performance shares, performance units, shares of Common Stock, restricted stock, restricted stock units (RSU) or other stock-based awards. The 2017 Stock Plan provides for the granting of options to purchase shares of the Company’s Common Stock at not less than the fair market value of such shares on the date of grant. Stock options granted under the 2017 Stock Plan generally become exercisable in equal installments over a three-year Information related to the Company’s equity-based compensation plans in effect as of September 30, 2020 was as follows: Plan Category Number of Securities to be Issued Upon Exercise of Outstanding Options or Vesting of Share Awards Weighted-Average Exercise Price of Outstanding Options Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans Equity compensation plans approved by security holders 1,731,277 $ 74.38 4,039,917 Equity compensation plans not approved by security holders — — — 1,731,277 $ 74.38 4,039,917 Total stock-based compensation expense (income) was as follows (in millions): Fiscal Year Ended September 30, 2020 2019 2018 Stock options $ 6.8 $ 6.9 $ 6.6 Stock awards (shares and units) 15.8 15.0 13.7 Performance share awards 6.7 7.1 6.4 Cash-settled stock appreciation rights 0.2 0.4 (0.2 ) Cash-settled restricted stock unit awards 0.7 0.6 0.4 Total stock-based compensation cost 30.2 30.0 26.9 Income tax benefit recognized for stock-based compensation (3.6 ) (4.9 ) (5.8 ) Stock-based compensation cost, net of tax $ 26.6 $ 25.1 $ 21.1 Stock Options — A summary of the Company’s stock option activity is as follows: Fiscal Year Ended September 30, 2020 2019 2018 Options Weighted- Average Exercise Price Options Weighted- Average Exercise Price Options Weighted- Average Exercise Price Outstanding, beginning of year 1,328,390 $ 62.62 1,268,984 $ 57.03 1,531,691 $ 45.14 Granted 301,025 90.28 372,450 66.09 261,900 86.59 Forfeited (40,965 ) 79.00 (24,175 ) 72.88 (43,270 ) 66.49 Expired (5,869 ) 84.25 (8,721 ) 76.92 (1 ) 41.52 Exercised (499,179 ) 52.18 (280,148 ) 40.62 (481,336 ) 34.41 Outstanding, end of year 1,083,402 74.38 1,328,390 62.62 1,268,984 57.03 Exercisable, end of year 537,241 68.16 709,826 55.11 650,143 45.92 Stock options outstanding and exercisable as of September 30, 2020 were as follows (in millions, except share and per share amounts): Outstanding Exercisable Exercise Prices Options Weighted Average Remaining Contractual Life (in years) Weighted Average Exercise Price Aggregate Intrinsic Value Options Weighted Average Remaining Contractual Life (in years) Weighted Average Exercise Price Aggregate Intrinsic Value $40.00 - $60.00 99,514 1.7 $ 43.26 $ 3.0 99,514 1.7 $ 43.26 $ 3.0 $60.01 - $80.00 493,958 6.2 66.41 3.5 282,819 4.7 66.64 1.9 $80.01 - $100.00 489,930 8.3 88.73 — 154,908 7.3 86.93 — 1,083,402 6.7 74.38 $ 6.5 537,241 4.9 68.16 $ 4.9 The aggregate intrinsic values in the tables above represent the total pre-tax intrinsic value (difference between the Company’s closing stock price on the last trading day of fiscal 2020 and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on September 30, 2020. This amount changes based on the fair market value of the Company’s Common Stock. The total intrinsic value of options exercised for fiscal 2020, 2019 and 2018 was $18.5 million, $10.2 million and $23.2 million, respectively. The actual income tax benefit realized totaled $4.3 million, $2.4 million and $6.3 million for those same periods. As of September 30, 2020, total unrecognized compensation cost related to outstanding stock options was $2.6 million, net of estimated forfeitures, which the Company expects to be recognized over a weighted-average period of 1.9 years. The Company uses the Black-Scholes valuation model to value stock options utilizing the following weighted-average assumptions: Fiscal Year Ended September 30, Options Granted During 2020 2019 2018 Assumptions: Expected term (in years) 5.4 5.4 5.4 Expected volatility 34.10 % 33.40 % 34.50 % Risk-free interest rate 1.63 % 2.87 % 2.09 % Expected dividend yield 1.37 % 1.50 % 1.15 % The expected option term represents the period of time that the options granted are expected to be outstanding and was based on historical experience. The Company used its historical stock prices over the expected term as the basis for the Company’s volatility assumption. The assumed risk-free interest rates were based on five-year U.S. Treasury rates in effect at the time of grant. The expected dividend yield was based on average actual yield on the ex-dividend date for the calendar year ended December 31, 2019. The weighted-average per share grant date fair values for stock option grants during fiscal 2020, 2019 and 2018 were $26.16, $20.00 $26.84 Stock Awards — A summary of the Company’s stock award activity is as follows: Fiscal Year Ended September 30, 2020 2019 2018 Number of Shares Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value Nonvested, beginning of year 411,510 $ 72.66 332,473 $ 69.15 352,159 $ 55.22 Granted 183,725 87.82 278,175 69.98 163,225 86.07 Forfeited (27,076 ) 80.57 (13,610 ) 71.17 (26,915 ) 65.66 Vested (221,351 ) 73.64 (185,528 ) 62.47 (155,996 ) 56.02 Nonvested, end of year 346,808 79.44 411,510 72.66 332,473 69.15 The total fair value of shares vested during fiscal 2020, 2019 and 2018 was $18.6 million, $12.3 million and $13.2 million, respectively. The actual income tax benefit realized totaled $3.1 million, $2.1 million and $3.0 million for those same periods. As of September 30, 2020, total unrecognized compensation cost related to stock awards was $8.4 million, net of estimated forfeitures, which the Company expects to be recognized over a weighted-average period of 1.9 years. Performance Share Awards — A summary of the Company’s performance share awards activity is as follows: Fiscal Year Ended September 30, 2020 2019 2018 Number of Shares Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value Nonvested, beginning of year 124,750 $ 84.10 98,375 $ 89.11 116,600 $ 60.71 Granted 55,325 109.09 73,950 74.70 57,625 97.79 Forfeited (16,615 ) 92.88 (1,600 ) 93.92 (13,977 ) 71.75 Performance adjustments 33,941 87.44 31,768 71.43 57,914 47.50 Vested (86,951 ) 92.73 (77,743 ) 76.12 (119,787 ) 47.55 Nonvested, end of year 110,450 89.54 124,750 84.10 98,375 89.11 Performance share awards generally vest over a three-year service period following the grant date. Performance shares vest under two separate measurement criteria. The first type vest only if the Company’s total shareholder return (TSR) over the three year term of the awards compares favorably to that of a comparator group of companies. The second type vest only if the Company’s return on invested capital (ROIC) over the vesting period compares favorably to that of a comparator group of companies. Potential payouts range from zero to 200% of the target awards and changes from target amounts are reflected as performance adjustments. Actual payouts for TSR performance share awards vesting in fiscal 2020, 2019 and 2018 were 111%, 126% and 200% of target levels, respectively. Actual payout for the ROIC performance share award vesting in fiscal 2020, 2019 and 2018 were 200%, 200%, and 191% of target levels. In October 2020, 68,125 shares of Common Stock were issued from treasury for unpaid performance shares that vested in fiscal 2020. The total fair value of performance shares vested during fiscal 2020, 2019 and 2018 was $6.9 million, $5.8 million and $7.6 million, respectively. The actual income tax benefit realized totaled $0.2 million, $1.4 million and $2.1 million for the same periods. As of September 30, 2020, the Company had $6.7 million of unrecognized compensation expense related to performance share awards, which will be recognized over a weighted-average period of 1.8 years. The grant date fair values of the TSR performance share awards were estimated using a Monte Carlo simulation model utilizing the following weighted-average assumptions: Fiscal Year Ended September 30, Total Shareholder Return Performance Shares Granted During 2020 2019 2018 Assumptions: Expected term (in years) 2.87 2.86 2.86 Expected volatility 31.16 % 32.72 % 32.27 % Risk-free interest rate 1.59 % 2.80 % 1.84 % The Company used its historical stock prices as the basis for the Company’s volatility assumption. The assumed risk-free interest rates were based on U.S. Treasury rates in effect at the time of grant. The expected term was based on the vesting period. The weighted-average fair value used to record compensation expense for TSR performance share awards granted during fiscal 2020, 2019 and 2018 was $137.74, $85.89 and $112.30 per award, respectively. The grant date fair value of the ROIC awards were determined based on the Company’s stock price at the time of the grant and the anticipated awards expected to vest. Compensation expense is recorded ratably over the vesting period based on the amount of award that is expected to be earned under the plan formula, adjusted each reporting period based on current information. Cash-Settled Stock Appreciation Rights — In fiscal 2020, 2019 and 2018, the Company granted employees 14,875, 18,250 and 11,650 cash-settled SARs, respectively. Each SAR award represents the right to receive cash equal to the excess of the per share price of the Company’s Common Stock on the date that a participant exercises such right over the grant date price of the Company’s Common Stock. Compensation cost for SARs is remeasured at each reporting period based on the estimated fair value on the date of grant using the Black Scholes option-pricing model, utilizing assumptions similar to stock option awards and is recognized as an expense over the requisite service period. The total value of SARs exercised during fiscal 2020, 2019 and 2018 was $0.7 million, $0.6 million and $3.8 million, respectively. Cash-Settled Restricted Stock Units — In fiscal 2020, 2019 and 2018 the Company granted employees 7,925, 8,350 and 8,125 cash-settled RSUs, respectively. Each RSU award provides recipients the right to receive cash equal to the value of a share of the Company’s Common Stock at predetermined vesting dates. Compensation cost for RSUs is remeasured at each reporting period and is recognized as an expense over the requisite service period. The total value of RSUs vested during fiscal 2020, 2019 and 2018 was $0.8 million, $0.4 million and $0.4 million, respectively.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Sep. 30, 2020
Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Abstract]
Employee Benefit Plans	5. Employee Benefit Plans Defined Benefit Plans — Oshkosh and certain of its subsidiaries sponsor multiple defined benefit pension plans for certain employees providing services to Oshkosh, Oshkosh Defense, Airport Products, Oshkosh Commercial and Pierce. The benefits provided are based primarily on average compensation, years of service and date of birth. Hourly plans are generally based on years of service and a benefit dollar multiplier. The Company periodically amends the plans, including changing the benefit dollar multipliers and other revisions. Effective December 31, 2012, salaried participants in the pension plans no longer receive credit, other than for vesting purposes, for eligible earnings. In December 2013, the Pierce pension plan was amended to close participation in the plan for new production employees. Effective October 1, 2016, the Oshkosh Defense hourly defined benefit pension plan was closed to new production employees. Determination of defined benefit pension and postretirement plan obligations and their associated expenses requires the use of actuarial valuations to estimate the benefits that employees earn while working, as well as the present value of those benefits. The Company uses the services of independent actuaries to assist with these calculations. The Company determines the discount rate used each year based on the rate of return currently available on a portfolio of high-quality fixed-income investments with a maturity that is consistent with the projected benefit payout period. The Company’s long-term rate of return on assets is based on consideration of historical and forward-looking returns and the current asset allocation strategy. Supplemental Executive Retirement Plans (SERP) — The Company maintains defined benefit and defined contribution SERPs for certain executive officers of Oshkosh and its subsidiaries. In fiscal 2013, the Oshkosh defined benefit SERP was amended to freeze benefits under the plan and certain executive officers became eligible for the new Oshkosh defined contribution SERP. At the same time, the Company established the Trust to fund obligations under the Oshkosh SERPs. As of September 30, 2020, the Trust held assets of $21.4 million. The Trust assets are subject to claims of the Company’s creditors. The Trust assets are included in “Other current assets” and “Other long-term assets” in the Consolidated Balance Sheets. The Company recognized Postretirement Medical Plans — Oshkosh and certain of its subsidiaries sponsor multiple postretirement benefit plans for Oshkosh Defense, JLG, and Kewaunee hourly employees, retirees and their spouses. The plans generally provide health benefits based on years of service and date of birth. These plans are unfunded. Changes in benefit obligations and plan assets, as well as the funded status of the Company’s defined benefit pension plans and postretirement benefit plans as of and for the fiscal years ended September 30, 2020 and 2019, were as follows (in millions): Postretirement Pension Benefits Health and Other 2020 2019 2020 2019 Accumulated benefit obligation at September 30 $ 601.1 $ 542.8 $ 53.3 $ 51.4 Change in projected benefit obligation Benefit obligation at October 1 $ 546.5 $ 455.8 $ 51.4 $ 46.6 Service cost 10.1 9.1 3.5 3.1 Interest cost 17.1 18.7 1.6 1.9 Actuarial loss (gain) 44.0 77.4 5.4 1.4 Participant contributions — 0.1 — — Plan amendments 9.8 0.2 (6.5 ) — Curtailments — 1.2 — — Benefits paid (15.8 ) (14.1 ) (2.1 ) (1.6 ) Currency translation adjustments 1.9 (1.9 ) — — Benefit obligation at September 30 $ 613.6 $ 546.5 $ 53.3 $ 51.4 Change in plan assets Fair value of plan assets at October 1 $ 408.9 $ 384.2 $ — $ — Actual return on plan assets 35.4 33.9 — — Company contributions 11.4 8.8 2.1 1.6 Participant contributions — 0.1 — — Expenses paid (4.3 ) (2.2 ) — — Benefits paid (15.8 ) (14.1 ) (2.1 ) (1.6 ) Currency translation adjustments 1.7 (1.8 ) — — Fair value of plan assets at September 30 $ 437.3 $ 408.9 $ — $ — Funded status of plan - underfunded at September 30 $ (176.3 ) $ (137.6 ) $ (53.3 ) $ (51.4 ) Recognized in consolidated balance sheet at September 30 Accrued benefit liability (current liability) $ (1.9 ) $ (1.8 ) $ (2.5 ) $ (1.2 ) Accrued benefit liability (long-term liability) (174.4 ) (135.8 ) (50.8 ) (50.2 ) $ (176.3 ) $ (137.6 ) $ (53.3 ) $ (51.4 ) Recognized in accumulated other comprehensive income (loss) as of September 30 (net of taxes) Net actuarial (loss) gain $ (89.0 ) $ (68.9 ) $ (6.1 ) $ (1.9 ) Prior service (cost) benefit (13.4 ) (7.0 ) 12.6 8.4 $ (102.4 ) $ (75.9 ) $ 6.5 $ 6.5 Weighted-average assumptions as of September 30 Discount rate 2.71 % 3.17 % 2.36 % 3.10 % Expected return on plan assets 4.89 % 5.49 % n/a n/a Pension benefit plans with accumulated benefit obligations in excess of plan assets consisted of the following (in millions): September 30, 2020 2019 Projected benefit obligation $ 613.6 $ 546.5 Accumulated benefit obligation 601.1 542.8 Fair value of plan assets 437.3 408.9 The components of net periodic benefit cost for fiscal years ended September 30 were as follows (in millions): Postretirement Pension Benefits Health and Other 2020 2019 2018 2020 2019 2018 Components of net periodic benefit cost Service cost $ 10.1 $ 9.1 $ 10.5 $ 3.5 $ 3.1 $ 3.7 Interest cost 17.1 18.7 17.9 1.6 1.9 1.8 Expected return on plan assets (20.6 ) (19.9 ) (20.1 ) — — — Amortization of prior service cost (benefit) 1.6 1.7 1.8 (0.9 ) (1.5 ) (0.9 ) Curtailment/settlement 0.1 1.2 — — — — Amortization of net actuarial loss (gain) 3.3 0.2 1.9 (0.2 ) (0.2 ) 0.1 Expenses paid 4.0 2.5 1.9 — — — Net periodic benefit cost $ 15.6 $ 13.5 $ 13.9 $ 4.0 $ 3.3 $ 4.7 Other changes in plan assets and benefit obligations recognized in other comprehensive income Net actuarial loss (gain) $ 29.4 $ 63.3 $ (35.9 ) $ 5.5 $ 1.4 $ (6.5 ) Prior service cost (benefit) 9.8 0.2 — (6.5 ) — (0.6 ) Amortization of prior service benefit (cost) (1.6 ) (1.7 ) (1.8 ) 0.9 1.5 0.9 Amortization of net actuarial (loss) gain (3.3 ) (0.2 ) (1.9 ) 0.2 0.2 (0.1 ) $ 34.3 $ 61.6 $ (39.6 ) $ 0.1 $ 3.1 $ (6.3 ) Weighted-average assumptions Discount rate 3.17% 4.18 % 3.85 % 3.10% 4.20 % 3.71 % Expected return on plan assets 5.49% 5.50 % 5.93 % n/a n/a n/a Components of net periodic benefit cost other than “Service cost” and “Expenses paid” are included in “Miscellaneous, net” in the Consolidated Statements of Income. Amounts expected to be recognized in pension and supplemental employee retirement plan net periodic benefit costs during fiscal 2021 included in “Accumulated other comprehensive loss” in the Consolidated Balance Sheet at September 30, 2020 are prior service costs of $2.3 million ($1.7 million net of tax) and unrecognized net actuarial losses of $4.9 million ($3.7 million net of tax). The assumed health care cost trend rate used in measuring the accumulated postretirement benefit obligation for the Company was 6.5% in fiscal 2020, declining to 5.0% in fiscal 2025. If the health care cost trend rate was increased by 100 basis points, the accumulated postretirement benefit obligation at September 30, 2020 would increase by $9.9 million and the net periodic postretirement benefit cost for fiscal 2021 would increase by $0.8 million. A corresponding decrease of 100 basis points would decrease the accumulated postretirement benefit obligation at September 30, 2020 by $7.5 million and the net periodic postretirement benefit cost for fiscal 2021 would decrease by $0.6 million. The Company’s Board of Directors has appointed an Investment Committee (Committee), which consists of members of management, to manage the investment of the Company’s pension plan assets. The Committee has established and operates under an Investment Policy. The Committee determines the asset allocation and target ranges based upon periodic asset/liability studies and capital market projections. The Committee retains external investment managers to invest the assets and an adviser to monitor the performance of the investment managers. The Investment Policy prohibits certain investment transactions, such as commodity contracts, margin transactions, short selling and investments in Company securities, unless the Committee gives prior approval. The weighted-average of the Company’s pension plan asset allocations and target allocations at September 30, 2020 by asset category, were as follows: Target % Actual Asset Category Fixed income 40% - 50% 47 % Large-cap equity 20% - 30% 24 % Mid-cap equity 5% - 15% 11 % Small-cap equity 5% - 10% 7 % Global equity 5% - 10% 7 % Other 0% - 10% 4 % 100 % The Company’s pension plan investment strategy is based on an expectation that, over time, equity securities will provide higher returns than debt securities. The plans primarily minimize the risk of larger losses under this strategy through diversification of investments by asset class, by investing in different styles of investment management within the classes and using a number of different investment managers. Beginning in fiscal 2016, the Company implemented a dynamic liability driven investment strategy for those pension plans with frozen benefits. The objective of this strategy is to more closely align the pension plan assets with the pension plan liabilities in terms of how both respond to changes in interest rates. Plan assets are allocated to two investment categories, including a category containing high quality fixed income securities and another category comprised of traditional securities and alternative asset classes. Assets are managed externally according to guidelines approved by the Company. Over time, the Company intends to reduce assets allocated to the return seeking category and correspondingly increase assets allocated to the high quality fixed income category to align assets more closely with the pension plan obligations. The plans’ expected return on assets is based on management’s and the Committee’s expectations of long-term average rates of return to be achieved by the plans’ investments. These expectations are based on the plans’ historical returns and expected returns for the asset classes in which the plans are invested. The fair value of plan assets by major category and level within the fair value hierarchy was as follows (in millions): Quoted Prices for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total September 30, 2020 Common stocks U.S. companies (a) $ 77.4 $ 8.1 $ — $ 85.5 International companies (b) — 13.5 — 13.5 Mutual funds (a) 81.5 — — 81.5 Government and agency bonds (c) — 7.7 — 7.7 Corporate bonds and notes (d) — 8.3 — 8.3 Money market funds (e) 12.5 — — 12.5 Other — — 0.8 0.8 $ 171.4 $ 37.6 $ 0.8 209.8 Investments measured at net asset value (NAV) (f) 227.5 $ 437.3 September 30, 2019 Common stocks U.S. companies (a) $ 75.9 $ 6.9 $ — $ 82.8 International companies (b) — 13.3 — 13.3 Mutual funds (a) 72.7 — — 72.7 Government and agency bonds (c) — 7.0 — 7.0 Corporate bonds and notes (d) — 7.5 — 7.5 Money market funds (e) 11.7 — — 11.7 Other — — 0.7 0.7 $ 160.3 $ 34.7 $ 0.7 195.7 Investments measured at net asset value (NAV) (f) 213.2 $ 408.9 (a) Primarily valued using a market approach based on the quoted market prices of identical instruments that are actively traded on public exchanges. (b) Valuation model looks at underlying security “best” price, exchange rate for underlying security’s currency against the U.S. dollar and ratio of underlying security to American depository receipt. (c) These investments consist of debt securities issued by the U.S. Treasury, U.S. government agencies and U.S. government-sponsored enterprises and have a variety of structures, coupon rates and maturities. These investments are considered to have low default risk as they are guaranteed by the U.S. government. Fixed income securities are primarily valued using a market approach with inputs that include broker quotes, benchmark yields, base spreads and reported trades. (d) These investments consist of debt obligations issued by a variety of private and public corporations. These are investment grade securities which historically have provided a steady stream of income. Fixed income securities are primarily valued using a market approach with inputs that include broker quotes, benchmark yields, base spreads and reported trades. (e) These investments largely consist of short-term investment funds and are valued using a market approach based on the quoted market prices of identical instruments. (f) These investments consist of privately placed funds that are valued based on NAV. NAV of the funds is based on the fair value of each funds underlying investments. In accordance with ASC Subtopic 820-10, certain investments that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The following table sets forth additional disclosures for the fair value measurement of the fair value of pension plans assets that calculate fair value based on NAV per share practical expedient as of September 30, 2020 (in millions): Fair Value Unfunded Commitments Redemption Frequency (if Currently Eligible) Redemption Notice Period (1) Common collective trust $ 227.5 $ — N/A 15 days (1) Represents the maximum redemption period. A portion of the investment does not have any redemption period restrictions. The following table sets forth additional disclosures for the fair value measurement of the fair value of pension plans assets that calculate fair value based on NAV per share practical expedient as of September 30, 2019 (in millions): Fair Value Unfunded Commitments Redemption Frequency (if Currently Eligible) Redemption Notice Period (1) Common collective trust $ 213.2 $ — N/A 15 days (1) Represents the maximum redemption period. A portion of the investment does not have any redemption period restrictions. The Company’s policy is to fund the pension plans in amounts that comply with contribution limits imposed by law. The Company expects to make contributions of approximately $25.0 million to its pension plans in fiscal 2021. The Company’s estimated future benefit payments under Company sponsored plans were as follows (in millions): Fiscal Year Ending Pension Benefits Postretirement Health September 30, Qualified Non-Qualified and Other 2021 $ 15.7 $ 1.9 $ 2.5 2022 17.2 1.9 3.0 2023 18.9 2.0 3.1 2024 20.4 2.0 3.6 2025 21.9 1.9 3.4 2026-2030 128.4 10.0 20.9 Multi-Employer Pension Plans — The Company participates in the Boilermaker-Blacksmith National Pension Trust (Employer Identification Number 48-6168020), a multi-employer defined benefit pension plan related to collective bargaining employees at the Company’s Kewaunee facility. The Company’s contributions and pension benefits payable under the plan and the administration of the plan are determined by the terms of the related collective-bargaining agreement, which expires on May 1, 2022. The multi-employer plan poses different risks to the Company than single-employer plans in the following respects: 1. The Company’s contributions to the multi-employer plan may be used to provide benefits to all participating employees of the program, including employees of other employers. 2. In the event that another participating employer ceases contributions to the multi-employer plan, the Company may be responsible for any unfunded obligations along with the remaining participating employers. 3. If the Company chooses to withdraw from the multi-employer plan, the Company may be required to pay a withdrawal liability based on the underfunded status of the plan at that time. As of December 31, 2019, the plan-certified zone status as defined by the Pension Protection Act of 2006 was Yellow and accordingly the plan has implemented a financial improvement plan. The Company’s contributions to the multi-employer plan did not exceed 5% 401(k) and Defined Contribution Pension Replacement Plans — The Company has defined contribution 401(k) plans for substantially all domestic employees. The plans allow employees to defer 2% to 100% of their income on a pre-tax basis. Each employee who elects to participate is eligible to receive Company matching contributions, which are based on employee contributions to the plans, subject to certain limitations. For pension replacement plans, the Company contributes between 2% and 6% of an employee’s base pay, depending on age. Amounts expensed for Company matching and discretionary contributions were $39.5 million, $43.3 million and $42.9 million in fiscal 2020, 2019 and 2018, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	6. Income Taxes Pre-tax income was taxed in the following jurisdictions (in millions): Fiscal Year Ended September 30, 2020 2019 2018 Domestic $ 429.7 $ 697.9 $ 514.9 Foreign 9.4 52.8 79.7 $ 439.1 $ 750.7 $ 594.6 Significant components of the provision for income taxes were as follows (in millions): Fiscal Year Ended September 30, 2020 2019 2018 Allocated to Income Before Earnings (Losses) of Unconsolidated Affiliates Current: Federal $ 70.1 $ 140.9 $ 92.0 Foreign 8.2 (0.2 ) 22.0 State 12.1 20.2 12.9 Total current 90.4 160.9 126.9 Deferred: Federal 14.3 2.1 5.4 Foreign 9.7 7.3 (5.5 ) State (1.6 ) 1.0 (3.0 ) Total deferred 22.4 10.4 (3.1 ) $ 112.8 $ 171.3 $ 123.8 Allocated to Other Comprehensive Income (Loss) Deferred federal, state and foreign $ 8.8 $ (14.9 ) $ 11.0 The reconciliation of income tax computed at the U.S. federal statutory tax rates to income tax expense was: Fiscal Year Ended September 30, 2020 2019 2018 Effective Rate Reconciliation U.S. federal tax rate 21.0 % 21.0 % 24.5 % State income taxes, net 2.8 % 2.5 % 2.1 % Foreign taxes 0.8 % -0.2 % 1.0 % Valuation allowance 3.3 % -0.1 % -1.4 % Domestic tax credits -3.2 % -1.0 % -2.1 % Manufacturing deduction — % -0.1 % -1.6 % Foreign-derived intangible income deduction -0.4 % -1.0 % — % Share-based compensation — % 0.1 % -0.7 % Remeasurement of deferred taxes - U.S. Tax Reform — % — % -5.1 % Mandatory repatriation tax - U.S. Tax Reform — % 0.7 % 3.3 % Other, net 1.4 % 0.9 % 0.8 % 25.7 % 22.8 % 20.8 % During fiscal 2020, the Company recorded net discrete tax charges of $8.0 million (1.8% of pre-tax income), which included a valuation allowance against certain foreign net deferred tax assets in Europe of $11.5 million, offset in part by benefits related to excess tax deductions from share-based compensation. Fiscal 2020 also included a favorable provision to return adjustment for federal and state research credits. During fiscal 2019, the Company recorded net discrete tax charges of $1.9 million (0.3% of pre-tax income), which included charges related to new tax legislation in the United States, offset in part by benefits related to excess tax deductions from share-based compensation, provision to return adjustments for federal, state, and foreign jurisdictions and tax reserve releases due to expiration of statutes of limitations and other resolutions. During fiscal 2018, the Company recorded discrete tax benefits of $21.7 million (3.6% of pre-tax income), which included benefits related to excess tax deductions from share-based compensation, provision to return adjustments for federal, state, and foreign jurisdictions, tax reserve releases due to expiration of statutes of limitations and other resolutions, and new tax legislations in the United States. On December 22, 2017, the U.S. Tax Cuts and Jobs Act (the “Tax Reform Act”) was signed into law. The Tax Reform Act significantly revised the U.S. corporate income tax regime by, among other things, lowering the U.S. corporate tax rate from 35% to 21% effective January 1, 2018, while also repealing the deduction for domestic production activities, implementing a territorial tax system, imposing a repatriation tax on deemed repatriated earnings of foreign subsidiaries (the “Transition Tax”), and creating new taxes on certain foreign-sourced earnings. The Company recorded a tax benefit of $30.2 million during fiscal 2018 as a result of the remeasurement of deferred tax assets and liabilities required as a result of the Tax Reform Act, which completed the Company’s remeasurement of deferred taxes under the Tax Reform Act. The Tax Reform Act also contained a provision that tied revenue recognition under U.S. GAAP to income reporting for tax purposes. Although the new provision accelerated the recognition of realized revenue, it did not change the definition of when revenue is realized for federal tax purposes. The Company has analyzed the new provision and concluded that revenue on U.S. defense contracts is not realized for federal tax purposes until customer acceptance. While the Company is expected to file its fiscal federal tax returns on this basis, the sustainment of this position is uncertain. If not sustained the recognition of revenue for federal tax purposes would be accelerated. The legislation provided no such acceleration of the related cost of sales, and accordingly the Company would temporarily be taxed on the revenue and not the income on the contract. The Company has recognized a deferred tax asset and income tax payable of $44.8 million and $61.0 million as of September 30, 2020 and September 30, 2019, respectively, related to this matter. Deferred income tax assets and liabilities were comprised of the following (in millions): September 30, 2020 2019 Deferred tax assets: Other long-term liabilities $ 127.0 $ 126.0 Losses and credits 34.8 27.9 Accrued warranty 15.8 14.5 Other current liabilities 17.7 15.0 Payroll-related obligations 18.5 23.4 Other 6.0 9.4 Gross deferred tax assets 219.8 216.2 Less valuation allowance (17.4 ) (1.1 ) Deferred tax assets, net 202.4 215.1 Deferred tax liabilities: Intangible assets (42.2 ) (40.0 ) Property, plant and equipment (55.9 ) (50.5 ) Inventories (18.6 ) (14.1 ) Other (7.1 ) (2.6 ) Deferred tax liabilities (123.8 ) (107.2 ) Deferred tax assets, net of deferred tax liabilities $ 78.6 $ 107.9 The net deferred tax asset is classified in the Consolidated Balance Sheets as follows (in millions): September 30, 2020 2019 Long-term net deferred tax asset $ 78.6 $ 107.9 Long-term net deferred tax liability — — Net deferred tax asset (liability) $ 78.6 $ 107.9 As of September 30, 2020, the Company had $42.0 million of net operating loss carryforwards available to reduce future taxable income of certain foreign subsidiaries in countries which allow such losses to be carried forward anywhere from seven years to an unlimited period. In addition, the Company had $167.7 million of state net operating loss carryforwards, which can be carried forward anywhere from five years to an unlimited period and state credit carryforwards of $25.8 million, which are subject to expiration in 2026 to 2035. Deferred tax assets for foreign net operating loss carryforwards, state net operating loss carryforwards and state credit carryforwards were $10.7 million, $6.6 million and $17.2 million, respectively. Amounts are reviewed for recoverability based on historical taxable income, the expected reversals of existing temporary differences, tax-planning strategies and projections of future taxable income. The Company maintains a valuation allowance against foreign deferred tax assets of $17.4 million as of September 30, 2020. At September 30, 2020, the Company had undistributed earnings of $392.5 million from its investment in non-U.S. subsidiaries. The Company has not recognized deferred tax liabilities for temporary differences related to the Company’s foreign operations as the Company considers that its undistributed earnings are intended to be indefinitely reinvested. Should the Company’s undistributed earnings from its investment in non-U.S. subsidiaries be distributed in the future in the form of dividends or otherwise, the Company may be subject to foreign and domestic income taxes and withholding taxes estimated at $24.3 million, including the impact of the regulations discussed below. On August 21, 2020, the U.S. Treasury Department and the U.S. Internal Revenue Service released final regulations related to the Tax Reform Act (the “final tax regulations”) related to the foreign dividends received deduction and global intangible low-taxed income. The final tax regulations contained language that modified certain provisions of the Tax Reform Act and previously issued guidance and are effective retroactively to the Company’s 2018 tax year and purport to cause certain intercompany transactions the Company engaged in during 2018 to produce U.S. taxable income upon a subsequent distribution from a controlled foreign corporation. The Company has analyzed the tax regulations and concluded that the U.S. Treasury Department exceeded regulatory authority and that the temporary tax regulations are contrary to the congressional intent of the underlying statute. The Company believes it has strong arguments in favor of its position and that it has met the more likely than not recognition threshold that its position will be sustained. The Company intends to vigorously defend its position, however, due to the uncertainty involved in challenging the validity of regulations as well as a potential litigation process, there can be no assurances that the temporary tax regulations will be invalidated, modified or that a court of law will rule in favor of the Company. An unfavorable resolution of this issue would result in $18.4 million of tax liability which is included in the $24.3 million disclosed withholding tax above. A reconciliation of gross unrecognized tax benefits, excluding interest and penalties, was as follows (in millions): Fiscal Year Ended September 30, 2020 2019 2018 Balance at beginning of year $ 97.3 $ 33.7 $ 37.2 Additions for tax positions related to current year 46.2 63.3 4.2 Additions for tax positions related to prior years 1.4 5.4 5.4 Reductions for tax positions related to prior years (61.8 ) (0.8 ) (7.1 ) Settlements (1.3 ) (0.9 ) (4.1 ) Lapse of statutes of limitations (2.0 ) (3.4 ) (1.9 ) Balance at end of year $ 79.8 $ 97.3 $ 33.7 As of September 30, 2020, net unrecognized tax benefits of $17.2 million would affect the Company’s effective tax rate if recognized. The Company recognizes accrued interest and penalties, if any, related to unrecognized tax benefits in the “Provision for income taxes” in the Consolidated Statements of Income. During fiscal 2020, 2019 and 2018, the Company recognized expense of $1.3 million, expense of $0.1 million and income of $3.7 million related to interest and penalties, respectively. At September 30, 2020 and 2019, the Company had accruals for the payment of interest and penalties of $5.7 million and $4.4 million, respectively. During fiscal 2021, it is reasonably possible that federal, state and foreign tax audit resolutions could reduce unrecognized tax benefits by approximately $7.3 million, either because the Company’s tax positions are sustained on audit, because the Company agrees to their disallowance or the statute of limitations closes. The Company files federal income tax returns, as well as multiple state, local and non-U.S. jurisdiction tax returns. The Company is regularly audited by federal, state and foreign tax authorities. As of September 30, 2020, tax years open for examination under applicable statutes were as follows: Tax Jurisdiction Open Tax Years Australia 2013 - 2020 Belgium 2018 - 2020 Brazil 2015 - 2020 Canada 2016 - 2020 China 2015 - 2020 Mexico 2016 - 2020 Romania 2014 - 2020 Netherlands 2014 - 2020 United Kingdom 2017 - 2020 Other Non-U.S. Countries 2014 - 2020 United States (federal general) 2016 - 2020 United States (federal limited scope) 2012 - 2016 United States (state and local) 2006 - 2020

Earnings Per Share

Earnings Per Share	12 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Earnings Per Share	7. Earnings Per Share The reconciliation of basic weighted-average shares outstanding to diluted weighted-average shares outstanding was as follows: Fiscal Year Ended September 30, 2020 2019 2018 Basic weighted-average common shares outstanding 68,149,324 69,819,980 74,001,582 Dilutive stock options and other equity-based compensation awards 638,405 738,255 980,417 Diluted weighted-average common shares outstanding 68,787,729 70,558,235 74,981,999 Options not included in the computation of diluted earnings per share attributable to common shareholders because they would have been anti-dilutive were as follows: Fiscal Year Ended September 30, 2020 2019 2018 Stock options 581,634 506,207 253,238

Receivables

Receivables	12 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Receivables	8. Receivables Receivables consisted of the following (in millions): September 30, 2020 2019 Trade receivables - U.S. government $ 105.8 $ 61.8 Trade receivables - other 734.0 997.7 Finance receivables 18.8 13.1 Notes receivable — 0.4 Other receivables 17.1 32.0 875.7 1,105.0 Less allowance for doubtful accounts (9.6 ) (11.3 ) $ 866.1 $ 1,093.7 Classification of receivables in the Consolidated Balance Sheets consisted of the following (in millions): September 30, 2020 2019 Current receivables $ 857.6 $ 1,082.3 Long-term receivables 8.5 11.4 $ 866.1 $ 1,093.7 Finance and notes receivable accrual status consisted of the following (in millions): September 30, Finance Receivables Notes Receivable 2020 2019 2020 2019 Receivables on nonaccrual status $ 0.2 $ 2.3 $ — $ — Receivables past due 90 days or more and still accruing — — — — Receivables subject to general reserves 16.3 10.8 — — Allowance for doubtful accounts (0.4 ) (0.2 ) — — Receivables subject to specific reserves 2.5 2.3 — 0.4 Allowance for doubtful accounts (2.3 ) (2.0 ) — (0.4 ) Finance Receivables: Finance receivables represent sales-type leases resulting from the sale of the Company’s products and the purchase of finance receivables from lenders pursuant to customer defaults under program agreements with finance companies. Finance receivables originated by the Company generally include a residual value component. Residual values are determined based on the expectation that the underlying equipment will have a minimum fair market value at the end of the lease term. This residual value accrues to the Company at the end of the lease. The Company uses its experience and knowledge as an original equipment manufacturer and participant in end markets for the related products along with third-party studies to estimate residual values. The Company monitors these values for impairment on a continuous basis and reflects any resulting reductions in value in current earnings. Delinquency is the primary indicator of credit quality of finance receivables. The Company maintains a general allowance for finance receivables considered doubtful of future collection based upon historical experience. Additional allowances are established based upon the Company’s evaluation of the quality of the finance receivables, including the length of time the receivables are past due, past experience of collectability and underlying economic conditions. In circumstances where the Company believes collectability is no longer reasonably assured, a specific allowance is recorded to reduce the net recognized receivable to the amount reasonably expected to be collected. The terms of the finance agreements generally give the Company the ability to take possession of the underlying collateral. The Company may incur losses in excess of recorded allowances if the financial condition of its customers were to deteriorate or the full amount of any anticipated proceeds from the sale of the collateral supporting its customers’ financial obligations is not realized. Quality of Finance Receivables: The Company does not accrue interest income on finance receivables in circumstances where the Company believes collectability is no longer reasonably assured. Any cash payments received on nonaccrual finance receivables are applied first to the principal balances. The Company does not resume accrual of interest income until the customer has shown that it is capable of meeting its financial obligations by making timely payments over a sustained period of time. The Company determines past due or delinquency status based upon the due date of the receivable. Receivables subject to specific reserves also include loans that the Company has modified in troubled debt restructurings as a concession to customers experiencing financial difficulty. To minimize the economic loss, the Company may modify certain finance receivables. Modifications generally consist of restructured payment terms and time-frames in which no payments are required. Losses on troubled debt restructurings were not significant during fiscal 2020, 2019 or 2018, respectively. Changes in the Company’s allowance for doubtful accounts by type of receivable were as follows (in millions): Fiscal Year Ended September 30, 2020 Finance Receivables Notes Receivable Trade and Other Receivables Total Allowance for doubtful accounts at beginning of year $ 2.2 $ 0.4 $ 8.7 $ 11.3 Provision for doubtful accounts, net of recoveries 0.5 — (1.1 ) (0.6 ) Charge-off of accounts — (0.4 ) (0.7 ) (1.1 ) Allowance for doubtful accounts at end of year $ 2.7 $ — $ 6.9 $ 9.6 Fiscal Year Ended September 30, 2019 Finance Receivables Notes Receivable Trade and Other Receivables Total Allowance for doubtful accounts at beginning of year $ 2.8 $ — $ 7.1 $ 9.9 Provision for doubtful accounts, net of recoveries (0.6 ) 0.4 2.0 1.8 Charge-off of accounts — — (0.4 ) (0.4 ) Allowance for doubtful accounts at end of year $ 2.2 $ 0.4 $ 8.7 $ 11.3

Inventories

Inventories	12 Months Ended
	Sep. 30, 2019
Inventory Disclosure [Abstract]
Inventories	9. Inventories Inventories consisted of the following (in millions): September 30, 2020 2019 Raw materials $ 745.7 $ 676.0 Partially finished products 295.2 244.2 Finished products 565.0 433.0 Inventories at FIFO cost 1,605.9 1,353.2 Excess of FIFO cost over LIFO cost (100.5 ) (104.0 ) $ 1,505.4 $ 1,249.2

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Sep. 30, 2020
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	10. Property, Plant and Equipment Property, plant and equipment consisted of the following (in millions): September 30, 2020 2019 Land and land improvements $ 63.9 $ 55.8 Buildings 377.1 325.8 Machinery and equipment 723.7 701.0 Software and related costs 175.6 181.2 Equipment on operating lease to others 21.7 39.5 Construction in progress 35.0 57.6 1,397.0 1,360.9 Less accumulated depreciation (831.1 ) (787.3 ) $ 565.9 $ 573.6 Depreciation expense was $89.1 million (including $6.9 million of accelerated depreciation related to restructuring actions), $76.7 million and $79.8 million in fiscal 2020, 2019 and 2018, respectively. Capitalized interest was insignificant for all reported periods. Equipment on operating lease to others represents the cost of equipment shipped to customers for whom the Company has guaranteed the residual value and equipment on short-term leases. These transactions are accounted for as operating leases with the related assets capitalized and depreciated over their estimated economic lives of five to ten years. Cost less accumulated depreciation for equipment on operating lease to others at September 30, 2020 and 2019 was $18.9 million and $31.3 million, respectively.

Goodwill and Purchased Intangib

Goodwill and Purchased Intangible Assets	12 Months Ended
	Sep. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Purchased Intangible Assets	11. Goodwill and Purchased Intangible Assets As of July 1, 2020, the Company performed its annual impairment review relative to goodwill and indefinite-lived intangible assets (principally non-amortizable trade names). To derive the fair value of its reporting units, the Company utilized both the income and market approaches. For the annual impairment testing in the fourth quarter of fiscal 2020, the Company used a weighted-average cost of capital, depending on the reporting unit, of 8.0% to 13.5% (9.5% to 13.0% at July 1, 2019) and a terminal growth rate of 3.0% (3.0% at July 1, 2019). Under the market approach, the Company derived the fair value of its reporting units based on revenue and earnings multiples of comparable publicly-traded companies. As a corroborative source of information, the Company reconciles its estimated fair value to within a reasonable range of its market capitalization, which includes an assumed control premium (an adjustment reflecting an estimated fair value on a control basis), to verify the reasonableness of the fair value of its reporting units obtained through the aforementioned methods. The control premium is estimated based upon control premiums observed in comparable market transactions. To derive the fair value of its trade names, the Company utilized the “relief from royalty” approach. At July 1, 2020, approximately 90% of the Company’s recorded goodwill and indefinite-lived purchased intangibles were concentrated within the JLG reporting unit in the Access Equipment segment. Assumptions utilized in the impairment analysis are highly judgmental. While the Company currently believes that an impairment of intangible assets at JLG is unlikely, events and conditions that could result in the impairment of intangibles at JLG include a sharp prolonged decline in economic conditions, significantly increased pricing pressure on JLG’s margins or other factors leading to reductions in expected long-term sales or profitability at JLG. Based on the Company’s annual impairment review, the Company concluded that there was no impairment of goodwill or indefinite-lived intangible assets. Changes in estimates or the application of alternative assumptions could have produced significantly different results. The following table presents changes in goodwill during fiscal 2020 and 2019 (in millions): Access Equipment Fire & Emergency Commercial Total Net goodwill at September 30, 2018 $ 880.9 $ 106.1 $ 20.9 $ 1,007.9 Foreign currency translation (12.1 ) — (0.1 ) (12.2 ) Net goodwill at September 30, 2019 868.8 106.1 20.8 995.7 Foreign currency translation 13.8 — — 13.8 Net goodwill at September 30, 2020 $ 882.6 $ 106.1 $ 20.8 $ 1,009.5 The following table presents details of the Company’s goodwill allocated to the reportable segments (in millions): September 30, 2020 September 30, 2019 Gross Accumulated Impairment Net Gross Accumulated Impairment Net Access Equipment $ 1,814.7 $ (932.1 ) $ 882.6 $ 1,800.9 $ (932.1 ) $ 868.8 Fire & Emergency 108.1 (2.0 ) 106.1 108.1 (2.0 ) 106.1 Commercial 196.7 (175.9 ) 20.8 196.7 (175.9 ) 20.8 $ 2,119.5 $ (1,110.0 ) $ 1,009.5 $ 2,105.7 $ (1,110.0 ) $ 995.7 Details of the Company’s total purchased intangible assets were as follows (in millions): September 30, 2020 Weighted- Average Life Gross Accumulated Amortization Net Amortizable intangible assets: Distribution network 39.1 $ 55.4 $ (33.8 ) $ 21.6 Technology-related 11.9 104.7 (103.3 ) 1.4 Customer relationships 12.8 554.7 (545.6 ) 9.1 Other 16.3 16.4 (15.0 ) 1.4 14.7 731.2 (697.7 ) 33.5 Non-amortizable trade names 384.7 — 384.7 $ 1,115.9 $ (697.7 ) $ 418.2 September 30, 2019 Weighted- Average Life Gross Accumulated Amortization Net Amortizable intangible assets: Distribution network 39.1 $ 55.4 $ (32.3 ) $ 23.1 Technology-related 11.9 104.7 (102.6 ) 2.1 Customer relationships 12.8 554.8 (536.8 ) 18.0 Other 16.1 16.3 (14.9 ) 1.4 14.7 731.2 (686.6 ) 44.6 Non-amortizable trade names 387.7 — 387.7 $ 1,118.9 $ (686.6 ) $ 432.3 When determining the value of customer relationships for purposes of allocating the purchase price of an acquisition, the Company looks at existing customer contracts of the acquired business to determine if they represent a reliable future source of income and hence, a valuable intangible asset for the Company. The Company determines the fair value of the customer relationships based on the estimated future benefits the Company expects from the acquired customer contracts. In performing its evaluation and estimation of the useful lives of customer relationships, the Company looks to the historical growth rate of revenue of the acquired company’s existing customers as well as the historical attrition rates. In connection with the valuation of intangible assets, a 40-year life was assigned to the value of the Pierce distribution network (net book value of $21.2 million at September 30, 2020). The Company believes Pierce maintains the largest North American fire apparatus distribution network. Pierce has exclusive contracts with each distributor related to the fire apparatus product offerings manufactured by Pierce. The useful life of the Pierce distribution network was based on a historical turnover analysis. Non-compete intangible asset lives are based on the terms of the applicable agreements. The estimated future amortization expense of purchased intangible assets for the five years succeeding September 30, 2020 are as follows: 2021 - $5.3 million; 2022 - $4.8 million; 2023 - $3.4 million; 2024 - $1.6 million and 2025 - $1.5 million.

Leases

Leases	12 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Leases	12. Leases The Company leases certain real estate, information technology equipment, warehouse equipment, vehicles and other equipment almost exclusively through operating leases. The Company determines whether an arrangement contains a lease at inception. A lease liability and corresponding right of use asset are recognized for qualifying leased assets based on the present value of fixed and certain index-based lease payments at lease commencement. Variable payments, which are generally determined based on the usage rate of the underlying asset, are excluded from the present value of lease payments and are recognized in the period in which the payment is made. To determine the present value of lease payments, the Company uses the stated interest rate in the lease, when available, or more commonly a secured incremental borrowing rate that reflects risk, term and economic environment in which the lease is denominated. The incremental borrowing rate is determined using a portfolio approach based on the current rate of interest that the Company would have to pay to borrow an amount equal to the lease payments on a collateralized basis over a similar term. The Company has elected not to separate payments for lease components from payments for non-lease components in contracts that contain both components. Lease agreements may include options to extend or terminate the lease. Those options that are reasonably certain of exercise at lease commencement have been included in the term of the lease used to recognize the right of use assets and lease liabilities. The lease terms of the Company’s real estate and equipment leases extend up to 29 years and 16 years, respectively. The Company has elected not to recognize ROU assets or lease liabilities for leases with a term of twelve months or less. Expense is recognized on a straight-line basis over the lease term for operating leases. In September 2020, the Company entered into a new real estate lease for a warehouse in the Access Equipment segment with a lease term of 15 years. The estimated initial right of use asset and lease liability of approximately $ 35 million The components of lease costs were as follows (in millions): Year Ended September 30, 2020 Operating lease cost $ 57.4 Variable lease cost 46.1 Short-term lease cost 8.4 Supplemental information related to leases was as follows (in millions): September 30, 2020 Balance Sheet Classification Finance leases Operating leases Total Lease right of use assets Other long-term assets $ 13.2 $ 149.0 $ 162.2 Current lease liabilities Other current liabilities 3.6 43.5 47.1 Long-term lease liabilities Other long-term liabilities 9.7 109.1 118.8 Weighted average remaining lease term 4.0 years 5.5 years Weighted average discount rates 2.4 % 2.9 % The table below presents the right of use asset balance for operating leases disaggregated by segment and type of lease (in millions): September 30, 2020 Access Equipment Defense Fire & Emergency Commercial Corporate and intersegment eliminations Total Real estate leases $ 61.4 $ 28.2 $ 6.5 $ 17.9 $ 7.0 $ 121.0 Equipment leases 7.3 4.2 2.2 1.9 12.4 28.0 $ 68.7 $ 32.4 $ 8.7 $ 19.8 $ 19.4 $ 149.0 Maturities of operating lease liabilities at September 30, 2020 and minimum payments for operating leases (under ASC 842) having initial or remaining non-cancelable terms in excess of one year were as follows (in millions): Amounts due in 2021 $ 47.7 2022 34.9 2023 23.7 2024 16.0 2025 11.5 Thereafter 31.3 Total lease payments 165.1 Less: imputed interest (12.5 ) Present value of lease liability $ 152.6 At September 30, 2019, future minimum operating lease payments (under ASC 840) were as follows (in millions): Amounts due in 2020 $ 34.0 2021 26.7 2022 15.9 2023 11.3 2024 7.1 Thereafter 11.7

Other Long-Term Assets

Other Long-Term Assets	12 Months Ended
	Sep. 30, 2020
Other Assets Noncurrent Disclosure [Abstract]
Other Long-Term Assets	13. Other Long-Term Assets Other long-term assets consisted of the following (in millions): September 30, 2020 2019 Lease right of use asset (See Note 12 of Notes to Consolidated Financial Statements) $ 162.2 $ — Deferred income taxes, net (See Note 6 of Notes to Consolidated Financial Statements) 78.6 107.9 Rabbi trust, less current portion 17.9 20.0 Investments in unconsolidated affiliates 12.6 11.0 Customer finance receivables 5.6 7.2 Other 10.1 10.7 287.0 156.8 Less allowance for doubtful receivables (0.5 ) (0.4 ) $ 286.5 $ 156.4 The rabbi trust (the “Trust”) holds investments to fund certain of the Company’s obligations under its nonqualified SERP. Trust investments include money market and mutual funds. The Trust assets are subject to claims of the Company’s creditors.

Credit Agreements

Credit Agreements	12 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Credit Agreements	14. Credit Agreements The Company was obligated under the following debt instruments (in millions): September 30, 2020 Principal Debt Issuance Costs Debt, Net Senior Term Loan $ 225.0 $ (0.3 ) $ 224.7 4.600% Senior notes due May 2028 300.0 (3.0 ) 297.0 3.100% Senior notes due March 2030 300.0 (3.8 ) 296.2 $ 825.0 $ (7.1 ) $ 817.9 Other short-term debt $ 5.2 September 30, 2019 Principal Debt Issuance Costs Debt, Net Senior Term Loan $ 275.0 $ (0.6 ) $ 274.4 5.375% Senior notes due March 2025 250.0 (2.0 ) 248.0 4.600% Senior notes due May 2028 300.0 (3.4 ) 296.6 $ 825.0 $ (6.0 ) $ 819.0 On April 3, 2018, the Company entered into a Second Amended and Restated Credit Agreement with various lenders (the “Credit Agreement”). The Credit Agreement provides for (i) an unsecured revolving credit facility (the “Revolving Credit Facility”) that matures in April 2023 with an initial maximum aggregate amount of availability of $850 million $325 million $4.1 million $264.1 million At September 30, 2020, outstanding letters of credit of $59.9 million reduced the available capacity under the Revolving Credit Facility to $790.1 million. Under the Credit Agreement, the Company is obligated to pay (i) an unused commitment fee ranging from 0.125% 0.275% 0.563% 1.75% Borrowings under the Credit Agreement bear interest at a variable rate equal to (i) LIBOR plus a specified margin federal funds rate one-month LIBOR The Credit Agreement contains various restrictions and covenants, including requirements that the Company maintain certain financial ratios at prescribed levels and restrictions, subject to certain exceptions, on the ability of the Company and certain of its subsidiaries to consolidate or merge, create liens, incur additional indebtedness, and dispose of substantially all assets. The Credit Agreement contains the following financial covenants: • Leverage Ratio: A maximum leverage ratio (defined as, with certain adjustments, the ratio of the Company’s consolidated indebtedness to consolidated net income for the previous four quarters before interest, taxes, depreciation, amortization, non-cash charges and certain other items (EBITDA)) as of the last day of any fiscal quarter of 3.75 to 1.00 . • Interest Coverage Ratio: A minimum interest coverage ratio (defined as, with certain adjustments, the ratio of the Company’s consolidated EBITDA to the Company’s consolidated cash interest expense for the previous four quarters) as of the last day of any fiscal quarter of 2.50 to 1.00 . The Company was in compliance with the financial covenants contained in the Credit Agreement as of September 30, 2020. In March 2015, the Company issued $250.0 million of 5.375% unsecured senior notes due March 1, 2025 (the “2025 Senior Notes”). In May 2018, the Company issued $300.0 million of 4.600% unsecured senior notes due May 15, 2028 (the “2028 Senior Notes”). The Company used the net proceeds from the sale of the 2028 Senior Notes to repay certain outstanding notes of the Company and to pre-pay $49.2 million of quarterly principal installment payments under the Term Loan. On February 26, 2020, the Company issued $300.0 million of 3.100% unsecured senior notes due March 1, 2030 (the “2030 Senior Notes”) at a discount of $1.2 million. The Company used a portion of the net proceeds from the sale of the 2030 Senior Notes to redeem all of the outstanding 2025 Senior Notes. The Company used the remaining net proceeds to pre-pay all outstanding future quarterly principal installments, as well as pay down a portion of the balloon payment due at maturity on the Term Loan. The Company recognized approximately $8.5 million of expense associated with the 2030 Senior Notes transaction, comprised of unamortized debt issuance costs and call premium costs on the 2025 Senior Notes. Expenses related to the transaction are included in interest expense. Additionally, approximately $2.9 million of debt issuance costs were capitalized to long-term debt in connection with the transaction. The 2028 Senior Notes and the 2030 Senior Notes were issued pursuant to an indenture (the “Indenture”) between the Company and a trustee. The indenture contains customary affirmative and negative covenants. The Company has the option to redeem the 2028 and 2030 Senior Notes at any time for a premium. In September 2019, the Company entered into a 220.0 million Chinese renminbi uncommitted line of credit to provide short-term finance support to operations in China. There was 35.0 million Chinese renminbi ($5.2 million) outstanding on the uncommitted line of credit at September 30, 2020. The line of credit carries a variable interest rate that is set by the lender, which was 3.5% at September 30, 2020. The fair value of the long-term debt is estimated based upon Level 2 inputs to reflect market rate of the Company’s debt. At September 30, 2020 , the fair value of the 202 8 Senior Notes and the 20 30 Senior Notes was estimated to be $342 million ( $322 million at September 30, 2019 ) and $316 million , respectively. The fair value of the Term Loan approximated book value at both September 30, 2020 and 2019 . See Note 2 2 of the Notes to Consolidated Financial Statements for the definition of a Level 2 input.

Warranties

Warranties	12 Months Ended
	Sep. 30, 2020
Product Warranties Disclosures [Abstract]
Warranties	15. Warranties The Company’s products generally carry explicit warranties that extend from six months to five years, based on terms that are generally accepted in the marketplace. Selected components (such as engines, transmissions, tires, etc.) included in the Company’s end products may include manufacturers’ warranties. These manufacturers’ warranties are generally passed on to the end customer of the Company’s products, and the customer would generally deal directly with the component manufacturer. Warranty costs recorded were $57.9 million, $54.9 million and $57.0 million in fiscal 2020, 2019 and 2018, respectively. Provisions for estimated warranty and other related costs are recorded at the time of sale and are periodically adjusted to reflect actual experience. Certain warranty and other related claims involve matters of dispute that ultimately are resolved by negotiation, arbitration or litigation. At times, warranty issues arise that are beyond the scope of the Company’s historical experience. It is reasonably possible that additional warranty and other related claims could arise from disputes or other matters in excess of amounts accrued; however, the Company does not expect that any such amounts, while not determinable, would have a material effect on the Company’s consolidated financial condition, results of operations or cash flows. Changes in the Company’s assurance-type warranty liability were as follows (in millions): Fiscal Year Ended September 30, 2020 2019 Balance at beginning of year $ 65.1 $ 75.3 Adoption of ASC 606 — (14.4 ) Warranty provisions 43.1 55.5 Settlements made (55.9 ) (50.2 ) Changes in liability for pre-existing warranties, net 14.8 (0.8 ) Foreign currency translation 0.3 (0.3 ) Balance at end of year $ 67.4 $ 65.1 Changes in the liability for pre-existing warranties in fiscal 2020 of $12.3 million within the Defense segment primarily relate to additional warranty costs on the Joint Light Tactical Vehicle (JLTV) program. Due to the adoption of ASC 606, the Company determined that certain warranties previously classified as assurance-type warranties are service-type warranties. The liabilities associated with service-type warranties are disclosed in Note 3 of the Notes to Consolidated Financial Statements.

Guarantee Arrangements

Guarantee Arrangements	12 Months Ended
	Sep. 30, 2020
Guarantees [Abstract]
Guarantee Arrangements	1 6 . Guarantee Arrangements Customers of the Company, from time to time, may fund purchases of the Company’s equipment through third-party finance companies. In certain instances, the Company may be requested to provide support for these arrangements through credit or residual value guarantees, by which the Company agrees to make payments to the finance companies in certain circumstances as further described below. Credit Guarantees: The Company is party to multiple agreements whereby at September 30, 2020 the Company guaranteed an aggregate of $749.8 million in indebtedness of customers. The Company estimated that its maximum loss exposure under these contracts at September 30, 2020 was $150.2 million. Terms of these guarantees coincide with the financing arranged by the customer and generally do not exceed five years. Under the terms of these agreements and upon the occurrence of certain events, the Company generally has the ability to, among other things, take possession of the underlying collateral. If the financial condition of the customers were to deteriorate and result in their inability to make payments, then loss provisions in excess of amounts provided for at inception may be required. Given the Company’s position as original equipment manufacturer and its knowledge of end markets, the Company, when called upon to fulfill a guarantee, generally has been able to liquidate the financed equipment at a minimal loss, if any, to the Company. While the Company does not expect to experience losses under these agreements that are materially in excess of the amounts reserved, it cannot provide any assurance that the financial condition of the third parties will not deteriorate resulting in the third parties’ inability to meet their obligations. In the event that this occurs, the Company cannot guarantee that the collateral underlying the agreements will be sufficient to avoid losses materially in excess of the amounts reserved. Any losses under these guarantees would generally be mitigated by the value of any underlying collateral, including financed equipment. During periods of economic weakness, collateral values generally decline and can contribute to higher exposure to losses. Residual Value Guarantees: The Company is party to multiple agreements whereby at September 30, 2020 the Company guaranteed to support an aggregate of $92.7 million of customer equipment value. The Company estimated that its maximum loss exposure under these contracts at September 30, 2020 was $11.9 million. Terms of these guarantees coincide with the financing arranged by the customer and generally do not exceed five years. Under the terms of these agreements, the Company guarantees that a piece of equipment will have a minimum residual value at a future date. If the counterparty is not able to recover the agreed upon residual value through sale, or alternative disposition, the Company is responsible for a portion of the shortfall. The Company is generally able to mitigate a portion of the risk associated with these guarantees by staggering the maturity terms of the guarantees, diversification of the portfolio and leveraging knowledge gained through the Company’s own experience in the used equipment markets. There can be no assurance the Company’s historical experience in used equipment markets will be indicative of future results. The Company’s ability to recover losses experienced from its guarantees may be affected by economic conditions in used equipment markets at the time of loss. During periods of economic weakness, residual values generally decline and can contribute to higher exposure to losses. Changes in the Company’s guarantee liability were as follows (in millions): Fiscal Year Ended September 30, 2020 2019 Balance at beginning of year $ 15.8 $ 10.4 Provision for new credit guarantees 4.9 9.9 Changes for pre-existing guarantees, net (0.5 ) (0.5 ) Amortization of previous guarantees (5.0 ) (3.8 ) Foreign currency translation 0.3 (0.2 ) Balance at end of year $ 15.5 $ 15.8

Restructuring and Other Charges

Restructuring and Other Charges	12 Months Ended
	Sep. 30, 2020
Restructuring And Related Activities [Abstract]
Restructuring and Other Charges	1 7 . Restructuring and Other Charges On June 29, 2020, the Company committed to a series of restructuring activities within its Access Equipment segment. On that day, the Company announced that it would close its Medias, Romania manufacturing facility. The Company intends to relocate production to factories in the United States, Mexico and China. The Company also announced that it would close its service center in Riverside, California. Both facilities are being closed to simplify and better align operations to support customers and enable sustainable growth. The Company intends to cease all operations in Medias by June 30, 2021 and in Riverside by December 31, 2020. In addition, the Access Equipment segment initiated targeted reductions in its salaried workforce in response to the ongoing COVID-19 pandemic. The Company incurred charges related to restructuring of $10.4 million during fiscal 2020, consisting of severance costs, other post-employment-related benefits and an impairment on a lease. The Company incurred additional charges of $4.7 million related to these restructuring actions, including $2.8 million of accelerated depreciation, $1.6 million in inventory obsolescence and $0.3 million of other operational costs. On July 23, 2020, the Company committed to a series of restructuring activities within the Commercial segment. On that day, the Company announced that it will cease production of rear discharge concrete mixers at its Dodge Center, Minnesota facility and relocate it to other concrete mixer factories in North America. The Dodge Center factory will focus on refuse collection vehicle manufacturing. The Company believes both product lines will benefit from focused facilities. The Company intends to cease all concrete mixer operations in Dodge Center by December 31, 2020. In addition, the Commercial segment reduced its salaried workforce in response to the ongoing COVID-19 pandemic. The Company incurred charges related to restructuring of $1.5 million during fiscal 2020, consisting of severance costs and other post-employment-related benefits. In addition, the Commercial segment experienced $4.1 million of accelerated depreciation as a result of this action. Pre-tax restructuring charges were as follows (in millions): Fiscal Year Ended September 30, 2020 Cost of Sales Selling, General and Administrative Expenses Total Access Equipment $ 2.9 $ 7.5 $ 10.4 Commercial 0.7 0.8 1.5 Fire & Emergency 0.3 1.1 1.4 Corporate — 1.1 1.1 Total $ 3.9 $ 10.5 $ 14.4 Changes in the Company’s restructuring reserves, included within “Other current liabilities” in the Consolidated Balance Sheets, were as follows (in millions): Employee Severance and Termination Benefits Property, Plant and Equipment Impairment Other Costs Total Balance at September 30, 2019 $ — $ — $ — $ — Restructuring provision 13.3 0.8 0.3 14.4 Utilized - cash (3.5 ) — — (3.5 ) Utilized - noncash — (0.8 ) — (0.8 ) Foreign currency translation (0.1 ) — — (0.1 ) Balance at September 30, 2020 $ 9.7 $ — $ 0.3 $ 10.0

Contingencies, Significant Esti

Contingencies, Significant Estimates and Concentrations	12 Months Ended
	Sep. 30, 2020
Commitments And Contingencies Disclosure [Abstract]
Contingencies, Significant Estimates and Concentrations	18. Contingencies, Significant Estimates and Concentrations Personal Injury Actions and Other — Product and general liability claims are made against the Company from time to time in the ordinary course of business. The Company is generally self-insured for future claims up to $5.0 million per claim. Accordingly, a reserve is maintained for the estimated costs of such claims. At September 30, 2020 and 2019, the estimated net liabilities for product and general liability claims totaled $33.8 million and $36.2 million, respectively. There is inherent uncertainty as to the eventual resolution of unsettled claims. Management, however, believes that any losses in excess of established reserves will not have a material effect on the Company’s financial condition, results of operations or cash flows. Market Risks — The Company was contingently liable under bid, performance and specialty bonds totaling $721.1 million and $552.2 million at September 30, 2020 and 2019, respectively. Open standby letters of credit issued by the Company’s banks in favor of third parties totaled $64.4 million and $63.7 million at September 30, 2020 and 2019, respectively. Other Matters — The Company is subject to other environmental matters and legal proceedings and claims, including patent, antitrust, product liability, warranty and state dealership regulation compliance proceedings that arise in the ordinary course of business. Although the final results of all such matters and claims cannot be predicted with certainty, management believes that the ultimate resolution of all such matters and claims will not have a material effect on the Company’s financial condition, results of operations or cash flows. Actual results could vary, among other things, due to the uncertainties involved in litigation. At September 30, 2020, approximately 23% of the Company’s workforce was covered under collective bargaining agreements. The Company derived a significant portion of its revenue from the DoD, as follows (in millions): Fiscal Year Ended September 30, 2020 2019 2018 DoD $ 2,300.4 $ 2,006.9 $ 1,648.4 Foreign military sales 71.2 27.7 28.0 Total DoD sales $ 2,371.6 $ 2,034.6 $ 1,676.4 No other customer represented more than 10% of sales for fiscal 2020, 2019 or 2018. Certain risks are inherent in doing business with the DoD, including technological changes and changes in levels of defense spending. All DoD contracts contain a provision that they may be terminated at any time at the convenience of the U.S. government. In such an event, the Company is entitled to recover allowable costs plus a reasonable profit earned to the date of termination. Major contracts for military systems are performed over extended periods of time and are subject to changes in scope of work and delivery schedules. Pricing negotiations on changes and settlement of claims often extend over prolonged periods of time. The Company’s ultimate profitability on such contracts may depend on the eventual outcome of an equitable settlement of contractual issues with the Company’s customers. Because the Company is a relatively large defense contractor, the Company’s U.S. government contract operations are subject to extensive annual audit processes and to U.S. government investigations of business practices and cost classifications from which legal or administrative proceedings can result. Based on U.S. government procurement regulations, under certain circumstances the Company could be fined, as well as suspended or debarred from U.S. government contracting. During a suspension or debarment, the Company would also be prohibited from selling equipment or services to customers that depend on loans or financial commitments from the Export-Import Bank, Overseas Private Investment Corporation and similar U.S. government agencies. The Company was one of several bidders on a large, multi-year military truck solicitation for the Canadian government. The Company’s bid was not selected, and the Company subsequently submitted a legal challenge of that conclusion. In May 2016, the Canadian International Trade Tribunal (the “Tribunal”) ruled in the Company’s favor in connection with that challenge. In December 2017, the Tribunal issued its Order and Reasons (the “Order”) outlining the compensation to which the Company is entitled as a result of the challenge. Under the Order, the Tribunal recommended that the Company be awarded a fixed payment for lost profits of approximately $25.3 million Canadian dollars plus additional compensation on any potential future option exercises if and when exercised by Canada. In August 2018, the Company reached a settlement with the Canadian government. The Company recorded a $19.0 million U.S. dollar reduction of selling, general and administrative expenses in fiscal 2018 in connection with the settlement. The Company recognized an $18.5 million gain during fiscal 2020 upon receipt of proceeds for a claim under its property and business interruption insurance. The claim was primarily for property damage and lost profits due to a weather-related roof collapse that occurred at one of the Commercial segment’s facilities in February 2019. The gain has been recognized as a reduction of cost of sales ($10.8 million), a reduction of selling, general and administrative expense ($1.5 million) and miscellaneous income ($6.2 million). The Company recognized a $6.6 million gain during fiscal 2018 upon receipt of proceeds for a claim under its business interruption insurance. The claim was primarily for lost profits due to an accident that occurred at one of the Commercial segment’s facilities in January 2017. The gain has been recognized as a reduction of cost of sales.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Sep. 30, 2020
Stockholders Equity Note [Abstract]
Shareholders' Equity	19. Shareholders’ Equity In May 2019, the Company’s Board of Directors approved a Common Stock repurchase authorization of 10,000,000 shares. The Company repurchased 550,853 shares of its Common Stock under this authorization in fiscal 2020 at a cost of $40.8 million. The Company repurchased 4,866,532 shares of Common Stock under this authorization in fiscal 2019 at a cost of $350.1 million. The Company repurchased 3,273,040 shares of Common Stock under this authorization in fiscal 2018 at a cost of $249.3 million. The Company has remaining authority to repurchase 7,459,328 shares of Common Stock as of September 30, 2020.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Sep. 30, 2020
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss)	20. Accumulated Other Comprehensive Income (Loss) Changes in accumulated other comprehensive income (loss) by component were as follows (in millions): Employee Pension and Postretirement Benefits, Net of Tax Cumulative Translation Adjustments Derivative Instruments, Net of Tax Accumulated Other Comprehensive Income (Loss) Balance at September 30, 2017 $ (46.2 ) $ (78.6 ) $ (0.2 ) $ (125.0 ) Other comprehensive income (loss) before reclassifications 33.1 (17.6 ) 0.6 16.1 Amounts reclassified from accumulated other comprehensive income (loss) 2.2 — (0.1 ) 2.1 Net current period other comprehensive income (loss) 35.3 (17.6 ) 0.5 18.2 Balance at September 30, 2018 (10.9 ) (96.2 ) 0.3 (106.8 ) Tax impact of U.S. tax reform on Accumulated Other Comprehensive Income (ASU 2018-02) (9.1 ) — — (9.1 ) Balance at October 1, 2018 (20.0 ) (96.2 ) 0.3 (115.9 ) Other comprehensive income (loss) before reclassifications (49.5 ) (36.3 ) — (85.8 ) Amounts reclassified from accumulated other comprehensive income (loss) 0.1 — — 0.1 Net current period other comprehensive income (loss) (49.4 ) (36.3 ) — (85.7 ) Balance at September 30, 2019 (69.4 ) (132.5 ) 0.3 (201.6 ) Other comprehensive income (loss) before reclassifications (29.3 ) 30.4 (0.5 ) 0.6 Amounts reclassified from accumulated other comprehensive income (loss) 2.8 — (0.2 ) 2.6 Net current period other comprehensive income (loss) (26.5 ) 30.4 (0.7 ) 3.2 Balance at September 30, 2020 $ (95.9 ) $ (102.1 ) $ (0.4 ) $ (198.4 ) Reclassifications out of accumulated other comprehensive income (loss) included in the computation of net periodic pension and postretirement benefit cost (See Note 5 of the Notes to Consolidated Financial Statements for additional details regarding employee benefit plans) were as follows (in millions): Classification of Fiscal Year Ended September 30, income (expense) 2020 2019 2018 Amortization of employee pension and postretirement benefits items Prior service costs Miscellaneous, net $ 0.7 $ 0.2 $ 0.9 Actuarial (gains) losses Miscellaneous, net 3.1 — 2.0 Total before tax 3.8 0.2 2.9 Tax benefit (1.0 ) (0.1 ) (0.7 ) Net of tax $ 2.8 $ 0.1 $ 2.2

Derivative Financial Instrument

Derivative Financial Instruments and Hedging Activities	12 Months Ended
	Sep. 30, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments and Hedging Activities	2 1 . Derivative Financial Instruments and Hedging Activities The Company uses forward foreign currency exchange contracts (derivatives) to reduce the exchange rate risk of specific foreign currency denominated transactions. These derivatives typically require the exchange of a foreign currency for U.S. dollars at a fixed rate at a future date. At times, the Company has designated these hedges as either cash flow hedges or fair value hedges under FASB ASC Topic 815, Derivatives and Hedging Fair Value Hedging Strategy: The Company enters into forward foreign exchange contracts to hedge certain firm commitments denominated in foreign currencies. The purpose of the Company’s foreign currency hedging activities is to protect the Company from risk that the eventual U.S. dollar-equivalent cash flows from the sale of products to international customers will be adversely affected by changes in exchange rates. Cash Flow Hedging Strategy: To protect against the impact of movements in foreign exchange rates on forecasted purchases or sales transactions denominated in foreign currency, the Company has a foreign currency cash flow hedging program. The Company hedges portions of its forecasted transactions denominated in foreign currency with forward contracts. At September 30, 2020, the total notional U.S. dollar equivalent of outstanding forward foreign exchange contracts designated as hedges in accordance with ASC Topic 815 was $9.1 million. Net gains or losses related to these contracts are recorded within the same line item in the Consolidated Statements of Income impacted by the hedged item. The maximum length of time the Company is hedging its exposure to the variability in future cash flows is under twelve months. The Company enters into forward foreign currency exchange contracts to create economic hedges to manage foreign exchange risk exposure associated with non-functional currency denominated receivables and payables resulting from global sales and sourcing activities. The Company has not designated these derivative contracts as hedge transactions under FASB ASC Topic 815, and accordingly, the mark-to-market impact of these derivatives is recorded each period in current earnings within “Miscellaneous, net” in the Consolidated Statements of Income. The fair value of foreign currency related derivatives is included in the Consolidated Balance Sheets in “Other current assets” and “Other current liabilities.” At September 30, 2020, the U.S. dollar equivalent of these outstanding forward foreign exchange contracts totaled $90.7 million in notional amounts covering a variety of foreign currency exposures. The fair values of all open derivative instruments were as follows (in millions): September 30, 2020 September 30, 2019 Other Current Assets Other Current Liabilities Other Current Assets Other Current Liabilities Cash flow hedges: Foreign exchange contracts $ — $ 0.5 $ 0.4 $ — Not designated as hedging instruments: Foreign exchange contracts — 2.0 0.4 0.4 $ — $ 2.5 $ 0.8 $ 0.4 The pre-tax effects of derivative instruments consisted of the following (in millions): Fiscal Year Ended September 30, Classification of Gains (Losses) 2020 2019 2018 Cash flow hedges: Foreign exchange contracts Cost of sales $ 0.6 $ 1.3 $ (0.5 ) — Not designated as hedging instruments: Foreign exchange contracts Miscellaneous, net 1.7 (1.7 ) (2.4 ) Interest rate contracts Miscellaneous, net — — (0.7 ) $ 2.3 $ (0.4 ) $ (3.6 )

Fair Value Measurement

Fair Value Measurement	12 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurement	22. Fair Value Measurement FASB ASC Topic 820, Fair Value Measurements and Disclosures The three levels are defined as follows: Level 1: Unadjusted quoted prices in active markets for identical assets or liabilities. Level 2: Observable inputs other than quoted prices in active markets for identical assets or liabilities, such as quoted prices for similar assets or liabilities in active markets or quoted prices for identical assets or liabilities in inactive markets. Level 3: Unobservable inputs reflecting management’s own assumptions about the inputs used in pricing the asset or liability. The fair values of the Company’s financial assets and liabilities were as follows (in millions): Level 1 Level 2 Level 3 Total September 30, 2020 Assets: SERP plan assets (a) $ 21.4 $ — $ — $ 21.4 Foreign currency exchange derivatives (b) — — — — Liabilities: Foreign currency exchange derivatives (b) $ — $ 2.5 $ — $ 2.5 Level 1 Level 2 Level 3 Total September 30, 2019 Assets: SERP plan assets (a) $ 21.4 $ — $ — $ 21.4 Foreign currency exchange derivatives (b) — 0.8 — 0.8 Liabilities: Foreign currency exchange derivatives (b) $ — $ 0.4 $ — $ 0.4 (a) Represents investments in a rabbi trust for the Company’s non-qualified SERP. The fair values of these investments are determined using a market approach. Investments include mutual funds for which quoted prices in active markets are available. The Company records changes in the fair value of investments in “Miscellaneous, net” in the Consolidated Statements of Income. (b) Based on observable market transactions of forward currency prices. See Notes 5 and 14 of the Notes to Consolidated Financial Statements for fair value information related to pension assets and debt. Items Measured at Fair Value on a Nonrecurring Basis — In addition to items that are measured at fair value on a recurring basis, the Company also has assets and liabilities in its balance sheet that are measured at fair value on a nonrecurring basis. As these assets and liabilities are not measured at fair value on a recurring basis, they are not included in the tables above. Assets and liabilities that are measured at fair value on a nonrecurring basis include long-lived assets (See Note 10 of the Notes to Consolidated Financial Statements for impairments of long-lived assets, Note 11 of the Notes to Consolidated Financial Statements for impairment valuation analysis of intangible assets and Note 12 of the Notes to Consolidated Financial Statements for impairments of right of use assets). The Company has determined that the fair value measurements related to each of these assets rely primarily on Company-specific inputs and the Company’s assumptions about the use of the assets, as observable inputs are not available. As such, the Company has determined that each of these fair value measurements reside within Level 3 of the fair value hierarchy.

Business Segment Information

Business Segment Information	12 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Business Segment Information	23. Business Segment Information The Company is organized into four reportable segments based on the internal organization used by the Chief Executive Officer for making operating decisions and measuring performance and based on the similarity of customers served, common management, common use of facilities and economic results attained. The Company’s segments are as follows: Access Equipment : This segment consists of JLG and JerrDan. JLG designs and manufactures aerial work platforms and telehandlers that are sold worldwide for use in a wide variety of construction, industrial, institutional and general maintenance applications to position workers and materials at elevated heights. Access Equipment customers include equipment rental companies, construction contractors, manufacturing companies and home improvement centers. JerrDan designs, manufactures and markets towing and recovery equipment in the U.S. and abroad. Defense : This segment consists of Oshkosh Defense. Oshkosh Defense designs and manufactures tactical wheeled vehicles and supply parts and services for the U.S. military and for other militaries around the world. Sales to the DoD accounted for 98%, 97% and 90% of the segment’s sales for fiscal 2020, 2019 and 2018, respectively. Fire & Emergency : This segment includes Pierce, Airport Products and Kewaunee. These business units design, manufacture and market commercial and custom fire vehicles, simulators and emergency vehicles primarily for fire departments, airports and other governmental units, and broadcast vehicles for broadcasters and TV stations in the U.S. and abroad. Commercial : This segment includes McNeilus, London, IMT and Oshkosh Commercial. McNeilus and London design, manufacture, market and distribute refuse collection vehicles and components. McNeilus, London and Oshkosh Commercial also design, manufacture, market and distribute concrete mixer vehicles and components. IMT is a designer and manufacturer of field service vehicles and truck-mounted cranes for niche markets. Sales are made primarily to commercial and municipal customers in the Americas. In accordance with FASB ASC Topic 280, Segment Reporting Selected financial information concerning the Company’s reportable segments and product lines is as follows (in millions): Fiscal Year Ended September 30, 2020 2019 2018 External Customers Inter- segment Net Sales External Customers Inter- segment Net Sales External Customers Inter- segment Net Sales Access Equipment Aerial work platforms $ 1,101.7 $ — $ 1,101.7 $ 1,944.4 $ — $ 1,944.4 $ 2,017.2 $ — $ 2,017.2 Telehandlers 680.4 — 680.4 1,254.9 — 1,254.9 948.9 — 948.9 Other 723.6 9.4 733.0 880.4 — 880.4 810.7 — 810.7 Total Access Equipment 2,505.7 9.4 2,515.1 4,079.7 — 4,079.7 3,776.8 — 3,776.8 Defense 2,260.3 1.9 2,262.2 2,030.3 1.8 2,032.1 1,827.3 1.6 1,828.9 Fire & Emergency 1,138.1 9.0 1,147.1 1,249.8 16.3 1,266.1 1,053.6 16.1 1,069.7 Commercial Concrete placement 403.5 — 403.5 439.9 — 439.9 491.8 — 491.8 Refuse collection 437.2 — 437.2 451.9 — 451.9 438.3 — 438.3 Other 110.6 6.5 117.1 128.3 2.1 130.4 116.7 7.9 124.6 Total Commercial 951.3 6.5 957.8 1,020.1 2.1 1,022.2 1,046.8 7.9 1,054.7 Corporate and intersegment eliminations 1.4 (26.8 ) (25.4 ) 2.1 (20.2 ) (18.1 ) 1.0 (25.6 ) (24.6 ) Consolidated $ 6,856.8 $ — $ 6,856.8 $ 8,382.0 $ — $ 8,382.0 $ 7,705.5 $ — $ 7,705.5 Fiscal Year Ended September 30, 2020 2019 2018 Operating income (loss): Access Equipment (a) $ 198.6 $ 502.6 $ 387.5 Defense (b) 183.5 203.3 225.4 Fire & Emergency (c) 151.1 176.5 137.6 Commercial (d) 81.2 66.8 67.5 Corporate (e) (125.7 ) (152.2 ) (162.0 ) Consolidated 488.7 797.0 656.0 Interest expense, net of interest income (f) (51.8 ) (47.6 ) (55.6 ) Miscellaneous other (expense) income (g) 2.2 1.3 (5.8 ) Income before income taxes and earnings (losses) of unconsolidated affiliates $ 439.1 $ 750.7 $ 594.6 (a) Fiscal 2020 results include $10.4 million of restructuring costs and $4.7 million operating expenses related to restructuring plans. Fiscal 2018 results include $4.7 million of restructuring costs and $24.8 million of operating expenses related to restructuring plans. (b) Fiscal 2020 results include reimbursement of $0.9 million of legal costs associated with an arbitration settlement. Fiscal 2018 results include a $19.0 million gain for a litigation settlement (See Note 18 of the Notes to Consolidated Financial Statements for additional details regarding the settlement). (c) Fiscal 2020 includes $1.4 million of restructuring costs. (d) Fiscal 2020 results include $1.5 million of restructuring costs, $4.1 million of accelerated depreciation related to restructuring actions, a gain of $12.3 million arising from a business interruption insurance recovery and a gain on the sale of a business of $3.1 million. Fiscal 2018 results include $5.4 million of restructuring costs, a business interruption insurance gain of $6.6 million and a loss on the sale of a small product line of $1.4 million (e) Fiscal 2020 includes $1.1 million of restructuring costs. ( f ) Fiscal 2020 results include $8.5 million in debt extinguishment costs and $3.3 million interest income from an arbitration settlement in the Defense segment. Fiscal 2018 results include $9.9 million in debt extinguishment costs. (g) Fiscal 2020 results include a $6.2 million gain from insurance proceeds in excess of property loss in the Commercial segment. Fiscal Year Ended September 30, 2020 2019 2018 Depreciation and amortization: Access Equipment (a) $ 42.1 $ 58.2 $ 61.1 Defense 20.1 17.3 15.2 Fire & Emergency 10.0 9.5 9.5 Commercial (b) 17.1 12.4 12.9 Corporate 14.9 17.8 21.8 Consolidated $ 104.2 $ 115.2 $ 120.5 Capital expenditures: Access Equipment (c) $ 56.5 $ 61.4 $ 34.2 Defense 32.3 31.4 29.1 Fire & Emergency 6.8 12.8 12.8 Commercial (c) 18.9 18.1 12.0 Corporate (d) 15.7 50.5 12.0 Consolidated $ 130.2 $ 174.2 $ 100.1 (a) Includes $2.8 million of accelerated deprecation associated with restructuring actions in fiscal 2020. (b) Includes $4.1 million of accelerated deprecation associated with restructuring actions in fiscal 2020. ( c ) Capital expenditures include both the purchase of property, plant and equipment and equipment held for rental. ( d ) Capital expenditures include capital spending for the construction of the Company’s new global headquarters. September 30, 2020 2019 Identifiable assets: Access Equipment: U.S. $ 2,151.4 $ 2,317.2 Europe, Africa and Middle East 383.4 403.4 Rest of the world (a) 359.0 252.6 Total Access Equipment 2,893.8 2,973.2 Defense: U.S. 1,055.5 883.0 Rest of the world 7.2 6.7 Total Defense 1,062.7 889.7 Fire & Emergency - U.S. 586.8 587.9 Commercial: U.S. 370.7 383.6 Rest of the world 47.5 48.9 Total Commercial 418.2 432.5 Corporate: U.S. (b) 854.4 597.6 Rest of the world (a) — 85.4 Total Corporate 854.4 683.0 Consolidated $ 5,815.9 $ 5,566.3 ( a ) Control of a shared manufacturing facility in Mexico transferred to the Access Equipment segment effective October 1, 2019. ( b ) Primarily includes cash and short-term investments and the Company’s global headquarters. The following table presents net sales by geographic region based on product shipment destination (in millions): Fiscal Year Ended September 30, 2020 Access Equipment Defense Fire & Emergency Commercial Eliminations Total Net sales: North America $ 1,881.6 $ 2,151.1 $ 1,069.4 $ 947.0 $ (25.4 ) $ 6,023.7 Europe, Africa and Middle East 275.3 107.0 29.8 1.6 — 413.7 Rest of the World 358.2 4.1 47.9 9.2 — 419.4 Consolidated $ 2,515.1 $ 2,262.2 $ 1,147.1 $ 957.8 $ (25.4 ) $ 6,856.8 Fiscal Year Ended September 30, 2019 Access Equipment Defense Fire & Emergency Commercial Eliminations Total Net sales: North America $ 3,147.9 $ 1,946.7 $ 1,142.3 $ 997.8 $ (18.1 ) $ 7,216.6 Europe, Africa and Middle East 548.6 84.0 27.7 3.9 — 664.2 Rest of the World 383.2 1.4 96.1 20.5 — 501.2 Consolidated $ 4,079.7 $ 2,032.1 $ 1,266.1 $ 1,022.2 $ (18.1 ) $ 8,382.0 Fiscal Year Ended September 30, 2018 Access Equipment Defense Fire & Emergency Commercial Eliminations Total Net sales: North America $ 2,849.9 $ 1,612.9 $ 1,006.8 $ 1,044.6 $ (24.6 ) $ 6,489.6 Europe, Africa and Middle East 630.2 215.0 4.7 1.9 — 851.8 Rest of the World 296.7 1.0 58.2 8.2 — 364.1 Consolidated $ 3,776.8 $ 1,828.9 $ 1,069.7 $ 1,054.7 $ (24.6 ) $ 7,705.5

Unaudited Quarterly Results

Unaudited Quarterly Results	12 Months Ended
	Sep. 30, 2020
Quarterly Financial Information Disclosure [Abstract]
Unaudited Quarterly Results	2 4 . Unaudited Quarterly Results (in millions, except per share amounts) Fiscal Year Ended September 30, 2020 4th Quarter (a) 3rd Quarter (b) 2nd Quarter (c) 1st Quarter Net sales $ 1,784.2 $ 1,580.8 $ 1,796.7 $ 1,695.1 Gross income 280.9 257.5 292.4 289.5 Operating income 127.4 118.6 133.6 109.1 Net income 100.0 80.2 68.6 75.7 Earnings per share: Basic $ 1.47 $ 1.18 $ 1.00 $ 1.11 Diluted $ 1.46 $ 1.17 $ 0.99 $ 1.10 Common Stock per share dividends $ 0.30 $ 0.30 $ 0.30 $ 0.30 (a) (b) (c) Fiscal Year Ended September 30, 2019 4th Quarter 3rd Quarter 2nd Quarter 1st Quarter (a) Net sales $ 2,195.7 $ 2,392.7 $ 1,990.2 $ 1,803.4 Gross income 397.3 433.9 357.9 328.3 Operating income 203.1 257.8 175.6 160.5 Net income 150.0 191.9 128.5 109.0 Earnings per share: Basic $ 2.20 $ 2.74 $ 1.84 $ 1.53 Diluted $ 2.17 $ 2.72 $ 1.82 $ 1.51 Common Stock per share dividends $ 0.27 $ 0.27 $ 0.27 $ 0.27 (a) The first quarter of fiscal 2019 was impacted by tax expense related to tax reform in the U.S. of $7.0 million.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Principles of Consolidation and Presentation	Principles of Consolidation and Presentation — The consolidated financial statements include the accounts of Oshkosh and all of its majority-owned or controlled subsidiaries and are prepared in conformity with generally accepted accounting principles in the United States of America (U.S. GAAP). All intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates — The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Revenue Recognition	Revenue Recognition — The Company recognizes revenue in accordance with Accounting Standards Codification (ASC) Topic 606, . Accordingly, revenue is recognized when control of the goods or services promised under a contract are transferred to the customer in an amount that reflects the consideration to which the Company expects to be entitled in exchange for the goods or services. The Company has elected to apply the following practical expedients and accounting policy elections when determining revenue from contracts with customers and capitalization of related costs: • Shipping and handling costs incurred after control of the related product has transferred to the customer are considered costs to fulfill the related promise and are included in “Cost of Sales” in the Consolidated Statements of Income when incurred or when the related product revenue is recognized, whichever is earlier. • Except for the Fire & Emergency segment, the Company has elected to not adjust revenue for the effects of a significant finance component when the timing difference between receipt of payment and recognition of revenue is less than one year. • Sales and similar taxes that are collected from customers are excluded from the transaction price. • The Company has elected to expense incremental costs to obtain a contract when the amortization period of the related asset is expected to be less than one year. See Note 3 of the Notes to Consolidated Financial Statements for information regarding the Company’s revenue recognition practices.
Assurance Warranty	Assurance Warranty — Provisions for estimated assurance warranties are recorded in cost of sales at the time of sale and are periodically adjusted to reflect actual experience. The amount of warranty liability accrued reflects management’s best estimate of the expected future cost of honoring Company obligations under the warranty plans. Historically, the cost of fulfilling the Company’s warranty obligations has principally involved replacement parts, labor and sometimes travel for any field retrofit campaigns. The Company’s estimates are based on historical experience, the extent of pre-production testing, the number of units involved and the extent of features/components included in product models. Also, each quarter, the Company reviews actual warranty claims experience to determine if there are systemic defects that would require a field campaign.
Research and Development and Similar Costs	Research and Development and Similar Costs — Except for customer sponsored research and development costs incurred pursuant to contracts (generally with the U.S. Department of Defense (DoD)), research and development costs are expensed as incurred and included in cost of sales. Research and development costs charged to expense totaled $103.9 million, $99.0 million and $99.3 million during fiscal 2020, 2019 and 2018, respectively. Customer sponsored research and development costs incurred pursuant to contracts are accounted for as contract costs.
Advertising	Advertising — Advertising costs are included in selling, general and administrative expense and are expensed as incurred. These expenses totaled $16.0 million, $24.9 million and $21.1 million in fiscal 2020, 2019 and 2018, respectively
Stock-based Compensation	Stock-Based Compensation — The Company recognizes stock-based compensation using the fair value provisions prescribed by ASC Topic 718, . Accordingly, compensation costs for awards of stock-based compensation settled in shares are determined based on the fair value of the share-based instrument at the time of grant and are recognized as expense over the vesting period of the share-based instrument, net of estimated forfeitures. See Note 4 of the Notes to Consolidated Financial Statements for information regarding the Company’s stock-based incentive plans.
Debt Financing Costs	Debt Financing Costs — Debt issuance costs on term debt are amortized using the interest method over the term of the debt. Deferred financing costs on lines of credit are amortized on a straight-line basis over the term of the related lines of credit. Amortization expense was $3.6 million (including $1.8 million of amortization related to early debt retirement), $1.6 million and $5.6 million (including $3.2 million of amortization related to early debt retirement) in fiscal 2020, 2019 and 2018, respectively
Income Taxes	Income Taxes — Deferred income taxes are provided to recognize temporary differences between the financial reporting basis and the income tax basis of the Company’s assets and liabilities using currently enacted tax rates and laws. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning strategies in making this assessment. The Company evaluates uncertain income tax positions in a two-step process. The first step is recognition, where the Company evaluates whether an individual tax position has a likelihood of greater than 50% of being sustained upon examination based on the technical merits of the position, including resolution of any related appeals or litigation processes. For tax positions that are currently estimated to have a less than 50% likelihood of being sustained, zero tax benefit is recorded. For tax positions that have met the recognition threshold in the first step, the Company performs the second step of measuring the benefit to be recorded. The actual benefits ultimately realized may differ from the Company’s estimates. In future periods, changes in facts and circumstances and new information may require the Company to change the recognition and measurement estimates with regard to individual tax positions. Changes in recognition and measurement estimates are recorded in results of operations and financial position in the period in which such changes occur.
Fair Value of Financial Instruments	Fair Value of Financial Instruments — Based on Company estimates, the carrying amounts of cash equivalents, receivables, unbilled receivables, accounts payable and accrued liabilities approximated fair value as of September 30, 2020 and 2019. See Notes 5, 14, 21 and 22 of the Notes to Consolidated Financial Statements for additional fair value information.
Cash and Cash Equivalents	Cash and Cash Equivalents — The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. Cash equivalents at September 30, 2020 consisted principally of bank deposits and money market instruments
Receivables	Receivables — Receivables consist of amounts billed and currently due from customers. The Company extends credit to customers in the normal course of business and maintains an allowance for estimated losses resulting from the inability or unwillingness of customers to make required payments. The accrual for estimated losses is based on the Company’s historical experience, existing economic conditions and any specific customer collection issues the Company has identified. Account balances are charged against the allowance when the Company determines it is probable the receivable will not be recovered.
Unbilled Receivables	Unbilled Receivables — Unbilled receivables consist of unbilled costs and accrued profits related to revenues on contracts with customers that have been recognized for accounting purposes but not yet billed to customers. In the Company’s Defense segment, amounts are billed as work progresses in accordance with agreed-upon contractual terms, either upon achievement of contractual milestones (e.g. acceptance of the vehicle) or at periodic intervals (e.g., biweekly or monthly). Generally, billing occurs subsequent to revenue recognition, resulting in unbilled receivables (contract assets).
Concentration of Credit Risk	Concentration of Credit Risk — Financial instruments that potentially subject the Company to significant concentrations of credit risk consist principally of cash equivalents, trade accounts receivable, unbilled receivables and guarantees of certain customers’ obligations under deferred payment contracts and lease purchase agreements. The Company maintains cash and cash equivalents, and other financial instruments, with various major financial institutions. The Company performs periodic evaluations of the relative credit standing of these financial institutions and limits the amount of credit exposure with any institution. Concentration of credit risk with respect to trade accounts and lease receivables is limited due to the large number of customers and their dispersion across many geographic areas. However, a significant amount of trade and lease receivables are with the U.S. government, with rental companies globally, with companies in the ready-mix concrete industry, with municipalities and with several large waste haulers in the United States. The Company continues to monitor credit risk associated with its trade receivables.
Inventories	Inventories — Inventories are stated at the lower of cost or market. Cost has been determined using the last-in, first-out (LIFO) method for 83% and 84% of the Company’s inventories at September 30, 2020 and 2019, respectively. For the remaining inventories, cost has been determined using the first-in, first-out (FIFO) method
Property, Plant and Equipment	Property, Plant and Equipment — Property, plant and equipment are recorded at cost. Depreciation expense is recognized over the estimated useful lives of the respective assets using straight-line and accelerated methods. The estimated useful lives range from ten to forty years four to twenty-five years three to ten years
Goodwill	Goodwill — Goodwill reflects the cost of an acquisition in excess of the aggregate fair value assigned to identifiable net assets acquired. Goodwill is not amortized; however, it is assessed for impairment at least annually and as triggering events or “indicators of potential impairment” occur. The Company performs its annual impairment test as of July 1 of each fiscal year. The Company evaluates the recoverability of goodwill by estimating the fair value of the businesses to which the goodwill relates. Estimated cash flows and related goodwill are grouped at the reporting unit level. A reporting unit is an operating segment or, under certain circumstances, a component of an operating segment. When the fair value of the reporting unit is less than the carrying value of the reporting unit, a further analysis is performed to measure and recognize the amount of the impairment loss, if any. Impairment losses, limited to the carrying value of goodwill, represent the excess of the carrying amount of a reporting unit’s goodwill over the implied fair value of that goodwill. In evaluating the recoverability of goodwill, it is necessary to estimate the fair value of the reporting units. The Company evaluates the recoverability of goodwill utilizing the income approach and the market approach. The Company weighted the income approach more heavily (75%) as the Company believes the income approach more accurately considers long-term fluctuations in the U.S. and European construction markets than the market approach. Under the income approach, the Company determines fair value based on estimated future cash flows discounted by an estimated weighted-average cost of capital, which reflects the overall level of inherent risk of a reporting unit and the rate of return an outside investor would expect to earn. Estimated future cash flows are based on the Company’s internal projection models, industry projections and other assumptions deemed reasonable by management. Rates used to discount estimated cash flows correspond to the Company’s cost of capital, adjusted for risk where appropriate, and are dependent upon interest rates at a point in time. There are inherent uncertainties related to these factors and management’s judgment in applying them to the analysis of goodwill impairment. Under the market approach, the Company derives the fair value of its reporting units based on revenue and earnings multiples of comparable publicly-traded companies. It is possible that assumptions underlying the impairment analysis will change in such a manner that impairment in value may occur in the future . See Note 11 of the Notes to Consolidated Financial Statements for information regarding the Company’s annual impairment testing .
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets — Property, plant and equipment, right-of-use (“ROU”) lease assets and amortizable intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. If the sum of the expected undiscounted cash flows is less than the carrying value of the related asset or group of assets, a loss is recognized for the difference between the fair value and carrying value of the asset or group of assets. Non-amortizable trade names are assessed for impairment at least annually and as triggering events or “indicators of potential impairment” occur. The Company performs its annual impairment test in the fourth quarter of its fiscal year. The Company evaluates the potential impairment by estimating the fair value of the non-amortizing intangible assets using the “relief from royalty” method. When the fair value of the non-amortizable trade name is less than the carrying value of the trade name, a further analysis is performed to measure and recognize the amount of the impairment loss, if any. Impairment losses, limited to the carrying value of the non-amortizable trade name, represent the excess of the carrying amount over the implied fair value of that non-amortizable trade name.
Customer Advances	Customer Advances — Customer advances include amounts received in advance of the completion of vehicles in the Fire & Emergency and Commercial segments. Most of these advances bear interest at fixed rates that approximate the prime rate at the time of the advance.
Other Long-Term Liabilities	Other Long-Term Liabilities — Other long-term liabilities are comprised principally of the portions of the Company’s pension liability, other post-employment benefit liability, tax liability, accrued warranty, accrued product liability and lease liabilities that are not expected to be settled in the subsequent twelve month period.
Foreign Currency Translation	Foreign Currency Translation — All balance sheet accounts have been translated into U.S. dollars using the exchange rates in effect at the balance sheet date. Income statement amounts have been translated using the average exchange rate during the period in which the transactions occurred. Resulting translation adjustments are included in “Accumulated other comprehensive loss.” Foreign currency transaction gains or losses are included in “Miscellaneous, net” in the Consolidated Statements of Income. The Company recorded a net foreign currency transaction loss of $2.7 million in fiscal 2020, a net foreign currency transaction gain of $2.1 million in fiscal 2019 and a net foreign currency transaction loss of $3.8 million in fiscal 2018
Derivative Financial Instruments	Derivative Financial Instruments — The Company recognizes all derivative financial instruments, such as foreign exchange contracts, in the consolidated financial statements at fair value regardless of the purpose or intent for holding the instrument. Changes in the fair value of derivative financial instruments are either recognized periodically in income or in equity as a component of comprehensive income depending on whether the derivative financial instrument qualifies for hedge accounting, and if so, whether it qualifies as a fair value hedge or cash flow hedge. Generally, changes in fair values of derivatives accounted for as fair value hedges are recorded in income along with the portions of the changes in the fair values of the hedged items that relate to the hedged risks. Changes in fair values of derivatives accounted for as cash flow hedges, to the extent they are effective as hedges, are recorded in other comprehensive income, net of deferred income taxes. Changes in fair value of derivatives not qualifying as hedges are reported in income. Cash flows from derivatives that are accounted for as cash flow or fair value hedges are included in the Consolidated Statements of Cash Flows in the same category as the item being hedged.
Recent Accounting Pronouncements	Recent Accounting Pronouncements — In February 2016, the Financial Accounting Standards Board (FASB) issued , which requires lessees to reflect most leases on their balance sheet as lease liabilities with corresponding ROU assets, while leaving presentation of lease expense in the statement of income largely unchanged. ROU assets represent the Company’s right to use an underlying asset during the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. The Company adopted the new standard on October 1, 2019 following the modified retrospective method of transition. Prior period comparative information was not recast to reflect the impact of the new standard and therefore continues to be reported under the accounting guidance in effect during those periods . The new standard provided a number of optional practical expedients for transition. The Company elected to adopt the standard using the package of practical expedients, which allowed the Company not to reassess prior conclusions about lease identification, lease classification and initial direct costs. In addition, the new standard provides practical expedients for an entity’s ongoing lessee accounting. The Company has elected not to separate payments for lease components from payments for non-lease components for any classes of assets. The Company has elected the short-term lease recognition exemption for all leases that qualify, which means ROU assets and lease liabilities are not recognized for leases with an initial term of twelve months or less. The most significant quantitative effect of adoption relates to the recognition of ROU assets and lease liabilities on the balance sheet for operating leases. The adoption did not have a material impact on the Company’s results of operations or cash flows. The cumulative effect of initially applying the new leasing standard to the Company’s Consolidated Financial Statements as of October 1, 2019 was as follows (in millions): Balance as of September 30, 2019 Cumulative Impact from Adopting New Lease Standard Balance as of October 1, 2019 Assets Other current assets $ 78.9 $ (0.5 ) $ 78.4 Total current assets 3,408.3 (0.5 ) 3,407.8 Other long-term assets 156.4 179.5 335.9 Total assets 5,566.3 179.0 5,745.3 Liabilities and Shareholders’ Equity Other current liabilities $ 307.3 $ 46.4 $ 353.7 Total current liabilities 1,741.9 46.4 1,788.3 Other long-term liabilities 405.6 132.6 538.2 Total liabilities and shareholders’ equity 5,566.3 179.0 5,745.3 See Note 12 of the Notes to Consolidated Financial Statements for additional information regarding the Company’s accounting for leases. Standards not yet adopted In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350), Simplifying the Test for Goodwill Impairment . The standard simplifies the measurement of goodwill impairment by eliminating the requirement that an entity compute the implied fair value of goodwill based on the fair values of its assets and liabilities to measure impairment. Instead, goodwill impairment will be measured as the difference between the fair value of the reporting unit and the carrying value of the reporting unit. The standard also clarifies the treatment of the income tax effect of tax - deductible goodwill when measuring goodwill impairment loss. The Company adopt ed ASU 2017-04 on October 1, 2020. The adoption of ASU 2017-04 did not have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Sep. 30, 2020
Accounting Standards Update 2016-02
Schedule of Effect of New Leasing Standard to Condensed Consolidated Financial Statements	The cumulative effect of initially applying the new leasing standard to the Company’s Consolidated Financial Statements as of October 1, 2019 was as follows (in millions): Balance as of September 30, 2019 Cumulative Impact from Adopting New Lease Standard Balance as of October 1, 2019 Assets Other current assets $ 78.9 $ (0.5 ) $ 78.4 Total current assets 3,408.3 (0.5 ) 3,407.8 Other long-term assets 156.4 179.5 335.9 Total assets 5,566.3 179.0 5,745.3 Liabilities and Shareholders’ Equity Other current liabilities $ 307.3 $ 46.4 $ 353.7 Total current liabilities 1,741.9 46.4 1,788.3 Other long-term liabilities 405.6 132.6 538.2 Total liabilities and shareholders’ equity 5,566.3 179.0 5,745.3

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Sep. 30, 2020
Sales And Revenue Recognition [Abstract]
Schedule of Changes Within Defense Segment Due to Contract Adjustments	Contract adjustments resulted in changes within the Defense segment as follows (in millions, except for per share amounts): Fiscal Year Ended September 30, 2020 2019 2018 Net sales $ 31.2 $ 63.9 $ 2.2 Operating income 16.2 44.7 2.2 Net income 12.4 34.5 1.7 Diluted earnings per share 0.18 0.49 0.02
Disaggregation of Revenue	The table below presents consolidated net sales disaggregated by segment and timing of revenue recognition (in millions): Fiscal Year Ended September 30, 2020 Access Equipment Defense Fire & Emergency Commercial Corporate and Intersegment Eliminations Total Point in time $ 2,437.5 $ 6.8 $ 1,103.9 $ 556.7 $ (26.8 ) $ 4,078.1 Over time 77.6 2,255.4 43.2 401.1 1.4 2,778.7 $ 2,515.1 $ 2,262.2 $ 1,147.1 $ 957.8 $ (25.4 ) $ 6,856.8 Fiscal Year Ended September 30, 2019 Access Equipment Defense Fire & Emergency Commercial Corporate and Intersegment Eliminations Total Point in time $ 4,001.6 $ 7.4 $ 1,220.5 $ 591.7 $ (20.1 ) $ 5,801.1 Over time 78.1 2,024.7 45.6 430.5 2.0 2,580.9 $ 4,079.7 $ 2,032.1 $ 1,266.1 $ 1,022.2 $ (18.1 ) $ 8,382.0
Schedule of Contract Liabilities and Revenue Recognized	Contract liabilities consisted of the following (in millions): September 30, 2020 2019 Customer advances $ 491.4 $ 382.0 Other current liabilities 59.5 78.2 Other long-term liabilities 53.7 52.3 Total contract liabilities $ 604.6 $ 512.5 Fiscal Year Ended September 30, 2020 2019 Beginning liabilities recognized in revenue $ 441.0 $ 530.9
Schedule of Changes in Warranty Liability and Unearned Extended Warranty Premiums	Changes in the Company’s service-type warranties were as follows (in millions): Fiscal Year Ended September 30, 2020 2019 Balance at beginning of period $ 68.2 $ 30.7 Adoption of ASC 606 — 35.7 Deferred revenue for new service-type warranties 23.6 27.5 Amortization of deferred revenue (27.9 ) (25.2 ) Foreign currency translation 0.5 (0.5 ) Balance at end of period $ 64.4 $ 68.2 Changes in the Company’s assurance-type warranty liability were as follows (in millions): Fiscal Year Ended September 30, 2020 2019 Balance at beginning of year $ 65.1 $ 75.3 Adoption of ASC 606 — (14.4 ) Warranty provisions 43.1 55.5 Settlements made (55.9 ) (50.2 ) Changes in liability for pre-existing warranties, net 14.8 (0.8 ) Foreign currency translation 0.3 (0.3 ) Balance at end of year $ 67.4 $ 65.1
Schedule of Classification of Service-type Warranties in Consolidated Balance Sheets	Classification of service-type warranties in the Consolidated Balance Sheets consisted of the following (in millions): September 30, 2020 2019 Other current liabilities $ 24.7 $ 27.8 Other long-term liabilities 39.7 40.4 $ 64.4 $ 68.2

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Sep. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Equity-Based Compensation Plans	Information related to the Company’s equity-based compensation plans in effect as of September 30, 2020 was as follows: Plan Category Number of Securities to be Issued Upon Exercise of Outstanding Options or Vesting of Share Awards Weighted-Average Exercise Price of Outstanding Options Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans Equity compensation plans approved by security holders 1,731,277 $ 74.38 4,039,917 Equity compensation plans not approved by security holders — — — 1,731,277 $ 74.38 4,039,917
Schedule of Stock Based Compensation Expense	Total stock-based compensation expense (income) was as follows (in millions): Fiscal Year Ended September 30, 2020 2019 2018 Stock options $ 6.8 $ 6.9 $ 6.6 Stock awards (shares and units) 15.8 15.0 13.7 Performance share awards 6.7 7.1 6.4 Cash-settled stock appreciation rights 0.2 0.4 (0.2 ) Cash-settled restricted stock unit awards 0.7 0.6 0.4 Total stock-based compensation cost 30.2 30.0 26.9 Income tax benefit recognized for stock-based compensation (3.6 ) (4.9 ) (5.8 ) Stock-based compensation cost, net of tax $ 26.6 $ 25.1 $ 21.1
Schedule of Stock Option Activity	Stock Options — A summary of the Company’s stock option activity is as follows: Fiscal Year Ended September 30, 2020 2019 2018 Options Weighted- Average Exercise Price Options Weighted- Average Exercise Price Options Weighted- Average Exercise Price Outstanding, beginning of year 1,328,390 $ 62.62 1,268,984 $ 57.03 1,531,691 $ 45.14 Granted 301,025 90.28 372,450 66.09 261,900 86.59 Forfeited (40,965 ) 79.00 (24,175 ) 72.88 (43,270 ) 66.49 Expired (5,869 ) 84.25 (8,721 ) 76.92 (1 ) 41.52 Exercised (499,179 ) 52.18 (280,148 ) 40.62 (481,336 ) 34.41 Outstanding, end of year 1,083,402 74.38 1,328,390 62.62 1,268,984 57.03 Exercisable, end of year 537,241 68.16 709,826 55.11 650,143 45.92
Schedule of Outstanding Stock Options	Stock options outstanding and exercisable as of September 30, 2020 were as follows (in millions, except share and per share amounts): Outstanding Exercisable Exercise Prices Options Weighted Average Remaining Contractual Life (in years) Weighted Average Exercise Price Aggregate Intrinsic Value Options Weighted Average Remaining Contractual Life (in years) Weighted Average Exercise Price Aggregate Intrinsic Value $40.00 - $60.00 99,514 1.7 $ 43.26 $ 3.0 99,514 1.7 $ 43.26 $ 3.0 $60.01 - $80.00 493,958 6.2 66.41 3.5 282,819 4.7 66.64 1.9 $80.01 - $100.00 489,930 8.3 88.73 — 154,908 7.3 86.93 — 1,083,402 6.7 74.38 $ 6.5 537,241 4.9 68.16 $ 4.9
Schedule of Weighted-Average Assumptions Used to Value Options	The Company uses the Black-Scholes valuation model to value stock options utilizing the following weighted-average assumptions: Fiscal Year Ended September 30, Options Granted During 2020 2019 2018 Assumptions: Expected term (in years) 5.4 5.4 5.4 Expected volatility 34.10 % 33.40 % 34.50 % Risk-free interest rate 1.63 % 2.87 % 2.09 % Expected dividend yield 1.37 % 1.50 % 1.15 %
Schedule of Nonvested Stock Activity	Stock Awards — A summary of the Company’s stock award activity is as follows: Fiscal Year Ended September 30, 2020 2019 2018 Number of Shares Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value Nonvested, beginning of year 411,510 $ 72.66 332,473 $ 69.15 352,159 $ 55.22 Granted 183,725 87.82 278,175 69.98 163,225 86.07 Forfeited (27,076 ) 80.57 (13,610 ) 71.17 (26,915 ) 65.66 Vested (221,351 ) 73.64 (185,528 ) 62.47 (155,996 ) 56.02 Nonvested, end of year 346,808 79.44 411,510 72.66 332,473 69.15
Schedule of Nonvested Performance-Based Units Activity	Performance Share Awards — A summary of the Company’s performance share awards activity is as follows: Fiscal Year Ended September 30, 2020 2019 2018 Number of Shares Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value Nonvested, beginning of year 124,750 $ 84.10 98,375 $ 89.11 116,600 $ 60.71 Granted 55,325 109.09 73,950 74.70 57,625 97.79 Forfeited (16,615 ) 92.88 (1,600 ) 93.92 (13,977 ) 71.75 Performance adjustments 33,941 87.44 31,768 71.43 57,914 47.50 Vested (86,951 ) 92.73 (77,743 ) 76.12 (119,787 ) 47.55 Nonvested, end of year 110,450 89.54 124,750 84.10 98,375 89.11
Schedule of Weighted-Average Assumptions to Estimate Grant Date Fair Values	The grant date fair values of the TSR performance share awards were estimated using a Monte Carlo simulation model utilizing the following weighted-average assumptions: Fiscal Year Ended September 30, Total Shareholder Return Performance Shares Granted During 2020 2019 2018 Assumptions: Expected term (in years) 2.87 2.86 2.86 Expected volatility 31.16 % 32.72 % 32.27 % Risk-free interest rate 1.59 % 2.80 % 1.84 %

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Sep. 30, 2020
Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Abstract]
Schedule of changes in the benefit obligations and plan assets, the funded status of the plans and the amounts recognized in the balance sheet	Changes in benefit obligations and plan assets, as well as the funded status of the Company’s defined benefit pension plans and postretirement benefit plans as of and for the fiscal years ended September 30, 2020 and 2019, were as follows (in millions): Postretirement Pension Benefits Health and Other 2020 2019 2020 2019 Accumulated benefit obligation at September 30 $ 601.1 $ 542.8 $ 53.3 $ 51.4 Change in projected benefit obligation Benefit obligation at October 1 $ 546.5 $ 455.8 $ 51.4 $ 46.6 Service cost 10.1 9.1 3.5 3.1 Interest cost 17.1 18.7 1.6 1.9 Actuarial loss (gain) 44.0 77.4 5.4 1.4 Participant contributions — 0.1 — — Plan amendments 9.8 0.2 (6.5 ) — Curtailments — 1.2 — — Benefits paid (15.8 ) (14.1 ) (2.1 ) (1.6 ) Currency translation adjustments 1.9 (1.9 ) — — Benefit obligation at September 30 $ 613.6 $ 546.5 $ 53.3 $ 51.4 Change in plan assets Fair value of plan assets at October 1 $ 408.9 $ 384.2 $ — $ — Actual return on plan assets 35.4 33.9 — — Company contributions 11.4 8.8 2.1 1.6 Participant contributions — 0.1 — — Expenses paid (4.3 ) (2.2 ) — — Benefits paid (15.8 ) (14.1 ) (2.1 ) (1.6 ) Currency translation adjustments 1.7 (1.8 ) — — Fair value of plan assets at September 30 $ 437.3 $ 408.9 $ — $ — Funded status of plan - underfunded at September 30 $ (176.3 ) $ (137.6 ) $ (53.3 ) $ (51.4 ) Recognized in consolidated balance sheet at September 30 Accrued benefit liability (current liability) $ (1.9 ) $ (1.8 ) $ (2.5 ) $ (1.2 ) Accrued benefit liability (long-term liability) (174.4 ) (135.8 ) (50.8 ) (50.2 ) $ (176.3 ) $ (137.6 ) $ (53.3 ) $ (51.4 )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	Recognized in accumulated other comprehensive income (loss) as of September 30 (net of taxes) Net actuarial (loss) gain $ (89.0 ) $ (68.9 ) $ (6.1 ) $ (1.9 ) Prior service (cost) benefit (13.4 ) (7.0 ) 12.6 8.4 $ (102.4 ) $ (75.9 ) $ 6.5 $ 6.5
Schedule of Weighted-average assumptions	Weighted-average assumptions as of September 30 Discount rate 2.71 % 3.17 % 2.36 % 3.10 % Expected return on plan assets 4.89 % 5.49 % n/a n/a
Schedule of Benefit Obligations in Excess of Plan Fair Value	Pension benefit plans with accumulated benefit obligations in excess of plan assets consisted of the following (in millions): September 30, 2020 2019 Projected benefit obligation $ 613.6 $ 546.5 Accumulated benefit obligation 601.1 542.8 Fair value of plan assets 437.3 408.9
Schedule of Net Periodic Benefit Cost	The components of net periodic benefit cost for fiscal years ended September 30 were as follows (in millions): Postretirement Pension Benefits Health and Other 2020 2019 2018 2020 2019 2018 Components of net periodic benefit cost Service cost $ 10.1 $ 9.1 $ 10.5 $ 3.5 $ 3.1 $ 3.7 Interest cost 17.1 18.7 17.9 1.6 1.9 1.8 Expected return on plan assets (20.6 ) (19.9 ) (20.1 ) — — — Amortization of prior service cost (benefit) 1.6 1.7 1.8 (0.9 ) (1.5 ) (0.9 ) Curtailment/settlement 0.1 1.2 — — — — Amortization of net actuarial loss (gain) 3.3 0.2 1.9 (0.2 ) (0.2 ) 0.1 Expenses paid 4.0 2.5 1.9 — — — Net periodic benefit cost $ 15.6 $ 13.5 $ 13.9 $ 4.0 $ 3.3 $ 4.7 Other changes in plan assets and benefit obligations recognized in other comprehensive income Net actuarial loss (gain) $ 29.4 $ 63.3 $ (35.9 ) $ 5.5 $ 1.4 $ (6.5 ) Prior service cost (benefit) 9.8 0.2 — (6.5 ) — (0.6 ) Amortization of prior service benefit (cost) (1.6 ) (1.7 ) (1.8 ) 0.9 1.5 0.9 Amortization of net actuarial (loss) gain (3.3 ) (0.2 ) (1.9 ) 0.2 0.2 (0.1 ) $ 34.3 $ 61.6 $ (39.6 ) $ 0.1 $ 3.1 $ (6.3 ) Weighted-average assumptions Discount rate 3.17% 4.18 % 3.85 % 3.10% 4.20 % 3.71 % Expected return on plan assets 5.49% 5.50 % 5.93 % n/a n/a n/a
Schedule of Pension Plan Asset and Target Allocation	The weighted-average of the Company’s pension plan asset allocations and target allocations at September 30, 2020 by asset category, were as follows: Target % Actual Asset Category Fixed income 40% - 50% 47 % Large-cap equity 20% - 30% 24 % Mid-cap equity 5% - 15% 11 % Small-cap equity 5% - 10% 7 % Global equity 5% - 10% 7 % Other 0% - 10% 4 % 100 %
Schedule of fair value of plan assets by major category and level within fair value hierarchy	The fair value of plan assets by major category and level within the fair value hierarchy was as follows (in millions): Quoted Prices for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total September 30, 2020 Common stocks U.S. companies (a) $ 77.4 $ 8.1 $ — $ 85.5 International companies (b) — 13.5 — 13.5 Mutual funds (a) 81.5 — — 81.5 Government and agency bonds (c) — 7.7 — 7.7 Corporate bonds and notes (d) — 8.3 — 8.3 Money market funds (e) 12.5 — — 12.5 Other — — 0.8 0.8 $ 171.4 $ 37.6 $ 0.8 209.8 Investments measured at net asset value (NAV) (f) 227.5 $ 437.3 September 30, 2019 Common stocks U.S. companies (a) $ 75.9 $ 6.9 $ — $ 82.8 International companies (b) — 13.3 — 13.3 Mutual funds (a) 72.7 — — 72.7 Government and agency bonds (c) — 7.0 — 7.0 Corporate bonds and notes (d) — 7.5 — 7.5 Money market funds (e) 11.7 — — 11.7 Other — — 0.7 0.7 $ 160.3 $ 34.7 $ 0.7 195.7 Investments measured at net asset value (NAV) (f) 213.2 $ 408.9 (a) Primarily valued using a market approach based on the quoted market prices of identical instruments that are actively traded on public exchanges. (b) Valuation model looks at underlying security “best” price, exchange rate for underlying security’s currency against the U.S. dollar and ratio of underlying security to American depository receipt. (c) These investments consist of debt securities issued by the U.S. Treasury, U.S. government agencies and U.S. government-sponsored enterprises and have a variety of structures, coupon rates and maturities. These investments are considered to have low default risk as they are guaranteed by the U.S. government. Fixed income securities are primarily valued using a market approach with inputs that include broker quotes, benchmark yields, base spreads and reported trades. (d) These investments consist of debt obligations issued by a variety of private and public corporations. These are investment grade securities which historically have provided a steady stream of income. Fixed income securities are primarily valued using a market approach with inputs that include broker quotes, benchmark yields, base spreads and reported trades. (e) These investments largely consist of short-term investment funds and are valued using a market approach based on the quoted market prices of identical instruments. (f) These investments consist of privately placed funds that are valued based on NAV. NAV of the funds is based on the fair value of each funds underlying investments. In accordance with ASC Subtopic 820-10, certain investments that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy.
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share	The following table sets forth additional disclosures for the fair value measurement of the fair value of pension plans assets that calculate fair value based on NAV per share practical expedient as of September 30, 2020 (in millions): Fair Value Unfunded Commitments Redemption Frequency (if Currently Eligible) Redemption Notice Period (1) Common collective trust $ 227.5 $ — N/A 15 days (1) Represents the maximum redemption period. A portion of the investment does not have any redemption period restrictions. The following table sets forth additional disclosures for the fair value measurement of the fair value of pension plans assets that calculate fair value based on NAV per share practical expedient as of September 30, 2019 (in millions): Fair Value Unfunded Commitments Redemption Frequency (if Currently Eligible) Redemption Notice Period (1) Common collective trust $ 213.2 $ — N/A 15 days (1) Represents the maximum redemption period. A portion of the investment does not have any redemption period restrictions.
Schedule of estimated future benefit payments	The Company’s estimated future benefit payments under Company sponsored plans were as follows (in millions): Fiscal Year Ending Pension Benefits Postretirement Health September 30, Qualified Non-Qualified and Other 2021 $ 15.7 $ 1.9 $ 2.5 2022 17.2 1.9 3.0 2023 18.9 2.0 3.1 2024 20.4 2.0 3.6 2025 21.9 1.9 3.4 2026-2030 128.4 10.0 20.9

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Schedule of Pre-tax Income (Loss) from Continuing Operations	Pre-tax income was taxed in the following jurisdictions (in millions): Fiscal Year Ended September 30, 2020 2019 2018 Domestic $ 429.7 $ 697.9 $ 514.9 Foreign 9.4 52.8 79.7 $ 439.1 $ 750.7 $ 594.6
Schedule of Components of Provision for (Benefit from) Income Taxes	Significant components of the provision for income taxes were as follows (in millions): Fiscal Year Ended September 30, 2020 2019 2018 Allocated to Income Before Earnings (Losses) of Unconsolidated Affiliates Current: Federal $ 70.1 $ 140.9 $ 92.0 Foreign 8.2 (0.2 ) 22.0 State 12.1 20.2 12.9 Total current 90.4 160.9 126.9 Deferred: Federal 14.3 2.1 5.4 Foreign 9.7 7.3 (5.5 ) State (1.6 ) 1.0 (3.0 ) Total deferred 22.4 10.4 (3.1 ) $ 112.8 $ 171.3 $ 123.8 Allocated to Other Comprehensive Income (Loss) Deferred federal, state and foreign $ 8.8 $ (14.9 ) $ 11.0
Schedule of Reconciliation of Income Tax Computed at U.S. Federal Statutory Tax Rates to Income Tax Expense	The reconciliation of income tax computed at the U.S. federal statutory tax rates to income tax expense was: Fiscal Year Ended September 30, 2020 2019 2018 Effective Rate Reconciliation U.S. federal tax rate 21.0 % 21.0 % 24.5 % State income taxes, net 2.8 % 2.5 % 2.1 % Foreign taxes 0.8 % -0.2 % 1.0 % Valuation allowance 3.3 % -0.1 % -1.4 % Domestic tax credits -3.2 % -1.0 % -2.1 % Manufacturing deduction — % -0.1 % -1.6 % Foreign-derived intangible income deduction -0.4 % -1.0 % — % Share-based compensation — % 0.1 % -0.7 % Remeasurement of deferred taxes - U.S. Tax Reform — % — % -5.1 % Mandatory repatriation tax - U.S. Tax Reform — % 0.7 % 3.3 % Other, net 1.4 % 0.9 % 0.8 % 25.7 % 22.8 % 20.8 %
Components of Deferred Income Tax Assets and Liabilities	Deferred income tax assets and liabilities were comprised of the following (in millions): September 30, 2020 2019 Deferred tax assets: Other long-term liabilities $ 127.0 $ 126.0 Losses and credits 34.8 27.9 Accrued warranty 15.8 14.5 Other current liabilities 17.7 15.0 Payroll-related obligations 18.5 23.4 Other 6.0 9.4 Gross deferred tax assets 219.8 216.2 Less valuation allowance (17.4 ) (1.1 ) Deferred tax assets, net 202.4 215.1 Deferred tax liabilities: Intangible assets (42.2 ) (40.0 ) Property, plant and equipment (55.9 ) (50.5 ) Inventories (18.6 ) (14.1 ) Other (7.1 ) (2.6 ) Deferred tax liabilities (123.8 ) (107.2 ) Deferred tax assets, net of deferred tax liabilities $ 78.6 $ 107.9
Schedule of Classification of Deferred Tax Asset in Consolidated Balance Sheets	The net deferred tax asset is classified in the Consolidated Balance Sheets as follows (in millions): September 30, 2020 2019 Long-term net deferred tax asset $ 78.6 $ 107.9 Long-term net deferred tax liability — — Net deferred tax asset (liability) $ 78.6 $ 107.9
Schedule of Reconciliation of Unrecognized Tax Benefits	A reconciliation of gross unrecognized tax benefits, excluding interest and penalties, was as follows (in millions): Fiscal Year Ended September 30, 2020 2019 2018 Balance at beginning of year $ 97.3 $ 33.7 $ 37.2 Additions for tax positions related to current year 46.2 63.3 4.2 Additions for tax positions related to prior years 1.4 5.4 5.4 Reductions for tax positions related to prior years (61.8 ) (0.8 ) (7.1 ) Settlements (1.3 ) (0.9 ) (4.1 ) Lapse of statutes of limitations (2.0 ) (3.4 ) (1.9 ) Balance at end of year $ 79.8 $ 97.3 $ 33.7
Schedule of Tax Years Open for Examination Under Applicable Statutes	As of September 30, 2020, tax years open for examination under applicable statutes were as follows: Tax Jurisdiction Open Tax Years Australia 2013 - 2020 Belgium 2018 - 2020 Brazil 2015 - 2020 Canada 2016 - 2020 China 2015 - 2020 Mexico 2016 - 2020 Romania 2014 - 2020 Netherlands 2014 - 2020 United Kingdom 2017 - 2020 Other Non-U.S. Countries 2014 - 2020 United States (federal general) 2016 - 2020 United States (federal limited scope) 2012 - 2016 United States (state and local) 2006 - 2020

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The reconciliation of basic weighted-average shares outstanding to diluted weighted-average shares outstanding was as follows: Fiscal Year Ended September 30, 2020 2019 2018 Basic weighted-average common shares outstanding 68,149,324 69,819,980 74,001,582 Dilutive stock options and other equity-based compensation awards 638,405 738,255 980,417 Diluted weighted-average common shares outstanding 68,787,729 70,558,235 74,981,999
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	Options not included in the computation of diluted earnings per share attributable to common shareholders because they would have been anti-dilutive were as follows: Fiscal Year Ended September 30, 2020 2019 2018 Stock options 581,634 506,207 253,238

Receivables (Tables)

Receivables (Tables)	12 Months Ended
	Sep. 30, 2020
Receivables [Abstract]
Schedule of Receivables	Receivables consisted of the following (in millions): September 30, 2020 2019 Trade receivables - U.S. government $ 105.8 $ 61.8 Trade receivables - other 734.0 997.7 Finance receivables 18.8 13.1 Notes receivable — 0.4 Other receivables 17.1 32.0 875.7 1,105.0 Less allowance for doubtful accounts (9.6 ) (11.3 ) $ 866.1 $ 1,093.7
Classification of Receivables in the Consolidated Balance Sheets	Classification of receivables in the Consolidated Balance Sheets consisted of the following (in millions): September 30, 2020 2019 Current receivables $ 857.6 $ 1,082.3 Long-term receivables 8.5 11.4 $ 866.1 $ 1,093.7
Schedule of Finance and Notes Receivable Aging and Accrual Status	Finance and notes receivable accrual status consisted of the following (in millions): September 30, Finance Receivables Notes Receivable 2020 2019 2020 2019 Receivables on nonaccrual status $ 0.2 $ 2.3 $ — $ — Receivables past due 90 days or more and still accruing — — — — Receivables subject to general reserves 16.3 10.8 — — Allowance for doubtful accounts (0.4 ) (0.2 ) — — Receivables subject to specific reserves 2.5 2.3 — 0.4 Allowance for doubtful accounts (2.3 ) (2.0 ) — (0.4 )
Schedule of Allowance for Doubtful Accounts	Changes in the Company’s allowance for doubtful accounts by type of receivable were as follows (in millions): Fiscal Year Ended September 30, 2020 Finance Receivables Notes Receivable Trade and Other Receivables Total Allowance for doubtful accounts at beginning of year $ 2.2 $ 0.4 $ 8.7 $ 11.3 Provision for doubtful accounts, net of recoveries 0.5 — (1.1 ) (0.6 ) Charge-off of accounts — (0.4 ) (0.7 ) (1.1 ) Allowance for doubtful accounts at end of year $ 2.7 $ — $ 6.9 $ 9.6 Fiscal Year Ended September 30, 2019 Finance Receivables Notes Receivable Trade and Other Receivables Total Allowance for doubtful accounts at beginning of year $ 2.8 $ — $ 7.1 $ 9.9 Provision for doubtful accounts, net of recoveries (0.6 ) 0.4 2.0 1.8 Charge-off of accounts — — (0.4 ) (0.4 ) Allowance for doubtful accounts at end of year $ 2.2 $ 0.4 $ 8.7 $ 11.3

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Sep. 30, 2020
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consisted of the following (in millions): September 30, 2020 2019 Raw materials $ 745.7 $ 676.0 Partially finished products 295.2 244.2 Finished products 565.0 433.0 Inventories at FIFO cost 1,605.9 1,353.2 Excess of FIFO cost over LIFO cost (100.5 ) (104.0 ) $ 1,505.4 $ 1,249.2

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Sep. 30, 2020
Property Plant And Equipment [Abstract]
Schedule of Property, Plant and Equipment	Property, plant and equipment consisted of the following (in millions): September 30, 2020 2019 Land and land improvements $ 63.9 $ 55.8 Buildings 377.1 325.8 Machinery and equipment 723.7 701.0 Software and related costs 175.6 181.2 Equipment on operating lease to others 21.7 39.5 Construction in progress 35.0 57.6 1,397.0 1,360.9 Less accumulated depreciation (831.1 ) (787.3 ) $ 565.9 $ 573.6

Goodwill and Purchased Intang_2

Goodwill and Purchased Intangible Assets (Tables)	12 Months Ended
	Sep. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Changes in Goodwill	The following table presents changes in goodwill during fiscal 2020 and 2019 (in millions): Access Equipment Fire & Emergency Commercial Total Net goodwill at September 30, 2018 $ 880.9 $ 106.1 $ 20.9 $ 1,007.9 Foreign currency translation (12.1 ) — (0.1 ) (12.2 ) Net goodwill at September 30, 2019 868.8 106.1 20.8 995.7 Foreign currency translation 13.8 — — 13.8 Net goodwill at September 30, 2020 $ 882.6 $ 106.1 $ 20.8 $ 1,009.5
Schedule of Company's Goodwill Allocated to the Reportable Segments	The following table presents details of the Company’s goodwill allocated to the reportable segments (in millions): September 30, 2020 September 30, 2019 Gross Accumulated Impairment Net Gross Accumulated Impairment Net Access Equipment $ 1,814.7 $ (932.1 ) $ 882.6 $ 1,800.9 $ (932.1 ) $ 868.8 Fire & Emergency 108.1 (2.0 ) 106.1 108.1 (2.0 ) 106.1 Commercial 196.7 (175.9 ) 20.8 196.7 (175.9 ) 20.8 $ 2,119.5 $ (1,110.0 ) $ 1,009.5 $ 2,105.7 $ (1,110.0 ) $ 995.7
Schedule of Purchased Intangible Assets	Details of the Company’s total purchased intangible assets were as follows (in millions): September 30, 2020 Weighted- Average Life Gross Accumulated Amortization Net Amortizable intangible assets: Distribution network 39.1 $ 55.4 $ (33.8 ) $ 21.6 Technology-related 11.9 104.7 (103.3 ) 1.4 Customer relationships 12.8 554.7 (545.6 ) 9.1 Other 16.3 16.4 (15.0 ) 1.4 14.7 731.2 (697.7 ) 33.5 Non-amortizable trade names 384.7 — 384.7 $ 1,115.9 $ (697.7 ) $ 418.2 September 30, 2019 Weighted- Average Life Gross Accumulated Amortization Net Amortizable intangible assets: Distribution network 39.1 $ 55.4 $ (32.3 ) $ 23.1 Technology-related 11.9 104.7 (102.6 ) 2.1 Customer relationships 12.8 554.8 (536.8 ) 18.0 Other 16.1 16.3 (14.9 ) 1.4 14.7 731.2 (686.6 ) 44.6 Non-amortizable trade names 387.7 — 387.7 $ 1,118.9 $ (686.6 ) $ 432.3

Leases (Tables)

Leases (Tables)	12 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Components of Lease Costs	The components of lease costs were as follows (in millions): Year Ended September 30, 2020 Operating lease cost $ 57.4 Variable lease cost 46.1 Short-term lease cost 8.4
Summary of Supplemental Information Related to Leases	Supplemental information related to leases was as follows (in millions): September 30, 2020 Balance Sheet Classification Finance leases Operating leases Total Lease right of use assets Other long-term assets $ 13.2 $ 149.0 $ 162.2 Current lease liabilities Other current liabilities 3.6 43.5 47.1 Long-term lease liabilities Other long-term liabilities 9.7 109.1 118.8 Weighted average remaining lease term 4.0 years 5.5 years Weighted average discount rates 2.4 % 2.9 %
Summary Right of Use Assets Balance for Operating Leases by Segment	The table below presents the right of use asset balance for operating leases disaggregated by segment and type of lease (in millions): September 30, 2020 Access Equipment Defense Fire & Emergency Commercial Corporate and intersegment eliminations Total Real estate leases $ 61.4 $ 28.2 $ 6.5 $ 17.9 $ 7.0 $ 121.0 Equipment leases 7.3 4.2 2.2 1.9 12.4 28.0 $ 68.7 $ 32.4 $ 8.7 $ 19.8 $ 19.4 $ 149.0
Schedule of Maturities and Minimum Payments of Operating Lease Liabilities	Maturities of operating lease liabilities at September 30, 2020 and minimum payments for operating leases (under ASC 842) having initial or remaining non-cancelable terms in excess of one year were as follows (in millions): Amounts due in 2021 $ 47.7 2022 34.9 2023 23.7 2024 16.0 2025 11.5 Thereafter 31.3 Total lease payments 165.1 Less: imputed interest (12.5 ) Present value of lease liability $ 152.6
Schedule of Operating Leases Future Minimum Payments	At September 30, 2019, future minimum operating lease payments (under ASC 840) were as follows (in millions): Amounts due in 2020 $ 34.0 2021 26.7 2022 15.9 2023 11.3 2024 7.1 Thereafter 11.7

Other Long-Term Assets (Tables)

Other Long-Term Assets (Tables)	12 Months Ended
	Sep. 30, 2020
Other Assets Noncurrent Disclosure [Abstract]
Schedule of other long-term assets	Other long-term assets consisted of the following (in millions): September 30, 2020 2019 Lease right of use asset (See Note 12 of Notes to Consolidated Financial Statements) $ 162.2 $ — Deferred income taxes, net (See Note 6 of Notes to Consolidated Financial Statements) 78.6 107.9 Rabbi trust, less current portion 17.9 20.0 Investments in unconsolidated affiliates 12.6 11.0 Customer finance receivables 5.6 7.2 Other 10.1 10.7 287.0 156.8 Less allowance for doubtful receivables (0.5 ) (0.4 ) $ 286.5 $ 156.4

Credit Agreements (Tables)

Credit Agreements (Tables)	12 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Schedule of Debt Instruments	The Company was obligated under the following debt instruments (in millions): September 30, 2020 Principal Debt Issuance Costs Debt, Net Senior Term Loan $ 225.0 $ (0.3 ) $ 224.7 4.600% Senior notes due May 2028 300.0 (3.0 ) 297.0 3.100% Senior notes due March 2030 300.0 (3.8 ) 296.2 $ 825.0 $ (7.1 ) $ 817.9 Other short-term debt $ 5.2 September 30, 2019 Principal Debt Issuance Costs Debt, Net Senior Term Loan $ 275.0 $ (0.6 ) $ 274.4 5.375% Senior notes due March 2025 250.0 (2.0 ) 248.0 4.600% Senior notes due May 2028 300.0 (3.4 ) 296.6 $ 825.0 $ (6.0 ) $ 819.0

Warranties (Tables)

Warranties (Tables)	12 Months Ended
	Sep. 30, 2020
Product Warranties Disclosures [Abstract]
Schedule of Changes in Warranty Liability and Unearned Extended Warranty Premiums	Changes in the Company’s service-type warranties were as follows (in millions): Fiscal Year Ended September 30, 2020 2019 Balance at beginning of period $ 68.2 $ 30.7 Adoption of ASC 606 — 35.7 Deferred revenue for new service-type warranties 23.6 27.5 Amortization of deferred revenue (27.9 ) (25.2 ) Foreign currency translation 0.5 (0.5 ) Balance at end of period $ 64.4 $ 68.2 Changes in the Company’s assurance-type warranty liability were as follows (in millions): Fiscal Year Ended September 30, 2020 2019 Balance at beginning of year $ 65.1 $ 75.3 Adoption of ASC 606 — (14.4 ) Warranty provisions 43.1 55.5 Settlements made (55.9 ) (50.2 ) Changes in liability for pre-existing warranties, net 14.8 (0.8 ) Foreign currency translation 0.3 (0.3 ) Balance at end of year $ 67.4 $ 65.1

Guarantee Arrangements (Tables)

Guarantee Arrangements (Tables)	12 Months Ended
	Sep. 30, 2020
Guarantees [Abstract]
Schedule of Provision for Losses on Customer Guarantees	Changes in the Company’s guarantee liability were as follows (in millions): Fiscal Year Ended September 30, 2020 2019 Balance at beginning of year $ 15.8 $ 10.4 Provision for new credit guarantees 4.9 9.9 Changes for pre-existing guarantees, net (0.5 ) (0.5 ) Amortization of previous guarantees (5.0 ) (3.8 ) Foreign currency translation 0.3 (0.2 ) Balance at end of year $ 15.5 $ 15.8

Restructuring and Other Charg_2

Restructuring and Other Charges (Tables)	12 Months Ended
	Sep. 30, 2020
Restructuring And Related Activities [Abstract]
Restructuring and Related Costs	Pre-tax restructuring charges were as follows (in millions): Fiscal Year Ended September 30, 2020 Cost of Sales Selling, General and Administrative Expenses Total Access Equipment $ 2.9 $ 7.5 $ 10.4 Commercial 0.7 0.8 1.5 Fire & Emergency 0.3 1.1 1.4 Corporate — 1.1 1.1 Total $ 3.9 $ 10.5 $ 14.4
Schedule of Restructuring Reserve by Type of Cost	Changes in the Company’s restructuring reserves, included within “Other current liabilities” in the Consolidated Balance Sheets, were as follows (in millions): Employee Severance and Termination Benefits Property, Plant and Equipment Impairment Other Costs Total Balance at September 30, 2019 $ — $ — $ — $ — Restructuring provision 13.3 0.8 0.3 14.4 Utilized - cash (3.5 ) — — (3.5 ) Utilized - noncash — (0.8 ) — (0.8 ) Foreign currency translation (0.1 ) — — (0.1 ) Balance at September 30, 2020 $ 9.7 $ — $ 0.3 $ 10.0

Contingencies, Significant Es_2

Contingencies, Significant Estimates and Concentrations (Tables)	12 Months Ended
	Sep. 30, 2020
Commitments And Contingencies Disclosure [Abstract]
Schedule of significant portion of revenues from the Department of Defense	The Company derived a significant portion of its revenue from the DoD, as follows (in millions): Fiscal Year Ended September 30, 2020 2019 2018 DoD $ 2,300.4 $ 2,006.9 $ 1,648.4 Foreign military sales 71.2 27.7 28.0 Total DoD sales $ 2,371.6 $ 2,034.6 $ 1,676.4

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Sep. 30, 2020
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component	Changes in accumulated other comprehensive income (loss) by component were as follows (in millions): Employee Pension and Postretirement Benefits, Net of Tax Cumulative Translation Adjustments Derivative Instruments, Net of Tax Accumulated Other Comprehensive Income (Loss) Balance at September 30, 2017 $ (46.2 ) $ (78.6 ) $ (0.2 ) $ (125.0 ) Other comprehensive income (loss) before reclassifications 33.1 (17.6 ) 0.6 16.1 Amounts reclassified from accumulated other comprehensive income (loss) 2.2 — (0.1 ) 2.1 Net current period other comprehensive income (loss) 35.3 (17.6 ) 0.5 18.2 Balance at September 30, 2018 (10.9 ) (96.2 ) 0.3 (106.8 ) Tax impact of U.S. tax reform on Accumulated Other Comprehensive Income (ASU 2018-02) (9.1 ) — — (9.1 ) Balance at October 1, 2018 (20.0 ) (96.2 ) 0.3 (115.9 ) Other comprehensive income (loss) before reclassifications (49.5 ) (36.3 ) — (85.8 ) Amounts reclassified from accumulated other comprehensive income (loss) 0.1 — — 0.1 Net current period other comprehensive income (loss) (49.4 ) (36.3 ) — (85.7 ) Balance at September 30, 2019 (69.4 ) (132.5 ) 0.3 (201.6 ) Other comprehensive income (loss) before reclassifications (29.3 ) 30.4 (0.5 ) 0.6 Amounts reclassified from accumulated other comprehensive income (loss) 2.8 — (0.2 ) 2.6 Net current period other comprehensive income (loss) (26.5 ) 30.4 (0.7 ) 3.2 Balance at September 30, 2020 $ (95.9 ) $ (102.1 ) $ (0.4 ) $ (198.4 )
Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Included in the Computation of Net Periodic Pension and Postretirement Benefit Cost	Reclassifications out of accumulated other comprehensive income (loss) included in the computation of net periodic pension and postretirement benefit cost (See Note 5 of the Notes to Consolidated Financial Statements for additional details regarding employee benefit plans) were as follows (in millions): Classification of Fiscal Year Ended September 30, income (expense) 2020 2019 2018 Amortization of employee pension and postretirement benefits items Prior service costs Miscellaneous, net $ 0.7 $ 0.2 $ 0.9 Actuarial (gains) losses Miscellaneous, net 3.1 — 2.0 Total before tax 3.8 0.2 2.9 Tax benefit (1.0 ) (0.1 ) (0.7 ) Net of tax $ 2.8 $ 0.1 $ 2.2

Derivative Financial Instrume_2

Derivative Financial Instruments and Hedging Activities (Tables)	12 Months Ended
	Sep. 30, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Schedule of Fair Values of All Open Derivative Instruments	The fair values of all open derivative instruments were as follows (in millions): September 30, 2020 September 30, 2019 Other Current Assets Other Current Liabilities Other Current Assets Other Current Liabilities Cash flow hedges: Foreign exchange contracts $ — $ 0.5 $ 0.4 $ — Not designated as hedging instruments: Foreign exchange contracts — 2.0 0.4 0.4 $ — $ 2.5 $ 0.8 $ 0.4
Schedule of Pre-tax Effects of Derivative Instruments	The pre-tax effects of derivative instruments consisted of the following (in millions): Fiscal Year Ended September 30, Classification of Gains (Losses) 2020 2019 2018 Cash flow hedges: Foreign exchange contracts Cost of sales $ 0.6 $ 1.3 $ (0.5 ) — Not designated as hedging instruments: Foreign exchange contracts Miscellaneous, net 1.7 (1.7 ) (2.4 ) Interest rate contracts Miscellaneous, net — — (0.7 ) $ 2.3 $ (0.4 ) $ (3.6 )

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	12 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Schedule of Fair Values of Financial Assets and Liabilities	The fair values of the Company’s financial assets and liabilities were as follows (in millions): Level 1 Level 2 Level 3 Total September 30, 2020 Assets: SERP plan assets (a) $ 21.4 $ — $ — $ 21.4 Foreign currency exchange derivatives (b) — — — — Liabilities: Foreign currency exchange derivatives (b) $ — $ 2.5 $ — $ 2.5 Level 1 Level 2 Level 3 Total September 30, 2019 Assets: SERP plan assets (a) $ 21.4 $ — $ — $ 21.4 Foreign currency exchange derivatives (b) — 0.8 — 0.8 Liabilities: Foreign currency exchange derivatives (b) $ — $ 0.4 $ — $ 0.4 (a) Represents investments in a rabbi trust for the Company’s non-qualified SERP. The fair values of these investments are determined using a market approach. Investments include mutual funds for which quoted prices in active markets are available. The Company records changes in the fair value of investments in “Miscellaneous, net” in the Consolidated Statements of Income. (b) Based on observable market transactions of forward currency prices.

Business Segment Information (T

Business Segment Information (Tables)	12 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Schedule of Net Sales by Product Lines and Reportable Segments	Selected financial information concerning the Company’s reportable segments and product lines is as follows (in millions): Fiscal Year Ended September 30, 2020 2019 2018 External Customers Inter- segment Net Sales External Customers Inter- segment Net Sales External Customers Inter- segment Net Sales Access Equipment Aerial work platforms $ 1,101.7 $ — $ 1,101.7 $ 1,944.4 $ — $ 1,944.4 $ 2,017.2 $ — $ 2,017.2 Telehandlers 680.4 — 680.4 1,254.9 — 1,254.9 948.9 — 948.9 Other 723.6 9.4 733.0 880.4 — 880.4 810.7 — 810.7 Total Access Equipment 2,505.7 9.4 2,515.1 4,079.7 — 4,079.7 3,776.8 — 3,776.8 Defense 2,260.3 1.9 2,262.2 2,030.3 1.8 2,032.1 1,827.3 1.6 1,828.9 Fire & Emergency 1,138.1 9.0 1,147.1 1,249.8 16.3 1,266.1 1,053.6 16.1 1,069.7 Commercial Concrete placement 403.5 — 403.5 439.9 — 439.9 491.8 — 491.8 Refuse collection 437.2 — 437.2 451.9 — 451.9 438.3 — 438.3 Other 110.6 6.5 117.1 128.3 2.1 130.4 116.7 7.9 124.6 Total Commercial 951.3 6.5 957.8 1,020.1 2.1 1,022.2 1,046.8 7.9 1,054.7 Corporate and intersegment eliminations 1.4 (26.8 ) (25.4 ) 2.1 (20.2 ) (18.1 ) 1.0 (25.6 ) (24.6 ) Consolidated $ 6,856.8 $ — $ 6,856.8 $ 8,382.0 $ — $ 8,382.0 $ 7,705.5 $ — $ 7,705.5
Schedule of Income (Loss) from Continuing Operations by Product Lines and Reportable Segments	Fiscal Year Ended September 30, 2020 2019 2018 Operating income (loss): Access Equipment (a) $ 198.6 $ 502.6 $ 387.5 Defense (b) 183.5 203.3 225.4 Fire & Emergency (c) 151.1 176.5 137.6 Commercial (d) 81.2 66.8 67.5 Corporate (e) (125.7 ) (152.2 ) (162.0 ) Consolidated 488.7 797.0 656.0 Interest expense, net of interest income (f) (51.8 ) (47.6 ) (55.6 ) Miscellaneous other (expense) income (g) 2.2 1.3 (5.8 ) Income before income taxes and earnings (losses) of unconsolidated affiliates $ 439.1 $ 750.7 $ 594.6 (a) Fiscal 2020 results include $10.4 million of restructuring costs and $4.7 million operating expenses related to restructuring plans. Fiscal 2018 results include $4.7 million of restructuring costs and $24.8 million of operating expenses related to restructuring plans. (b) Fiscal 2020 results include reimbursement of $0.9 million of legal costs associated with an arbitration settlement. Fiscal 2018 results include a $19.0 million gain for a litigation settlement (See Note 18 of the Notes to Consolidated Financial Statements for additional details regarding the settlement). (c) Fiscal 2020 includes $1.4 million of restructuring costs. (d) Fiscal 2020 results include $1.5 million of restructuring costs, $4.1 million of accelerated depreciation related to restructuring actions, a gain of $12.3 million arising from a business interruption insurance recovery and a gain on the sale of a business of $3.1 million. Fiscal 2018 results include $5.4 million of restructuring costs, a business interruption insurance gain of $6.6 million and a loss on the sale of a small product line of $1.4 million (e) Fiscal 2020 includes $1.1 million of restructuring costs. ( f ) Fiscal 2020 results include $8.5 million in debt extinguishment costs and $3.3 million interest income from an arbitration settlement in the Defense segment. Fiscal 2018 results include $9.9 million in debt extinguishment costs. (g) Fiscal 2020 results include a $6.2 million gain from insurance proceeds in excess of property loss in the Commercial segment.
Schedule of Depreciation, Amortization and Capital Expenditure by Segment	Fiscal Year Ended September 30, 2020 2019 2018 Depreciation and amortization: Access Equipment (a) $ 42.1 $ 58.2 $ 61.1 Defense 20.1 17.3 15.2 Fire & Emergency 10.0 9.5 9.5 Commercial (b) 17.1 12.4 12.9 Corporate 14.9 17.8 21.8 Consolidated $ 104.2 $ 115.2 $ 120.5 Capital expenditures: Access Equipment (c) $ 56.5 $ 61.4 $ 34.2 Defense 32.3 31.4 29.1 Fire & Emergency 6.8 12.8 12.8 Commercial (c) 18.9 18.1 12.0 Corporate (d) 15.7 50.5 12.0 Consolidated $ 130.2 $ 174.2 $ 100.1 (a) Includes $2.8 million of accelerated deprecation associated with restructuring actions in fiscal 2020. (b) Includes $4.1 million of accelerated deprecation associated with restructuring actions in fiscal 2020. ( c ) Capital expenditures include both the purchase of property, plant and equipment and equipment held for rental. ( d ) Capital expenditures include capital spending for the construction of the Company’s new global headquarters.
Schedule of Identifiable Assets by Business Segments and by Geographical Areas	September 30, 2020 2019 Identifiable assets: Access Equipment: U.S. $ 2,151.4 $ 2,317.2 Europe, Africa and Middle East 383.4 403.4 Rest of the world (a) 359.0 252.6 Total Access Equipment 2,893.8 2,973.2 Defense: U.S. 1,055.5 883.0 Rest of the world 7.2 6.7 Total Defense 1,062.7 889.7 Fire & Emergency - U.S. 586.8 587.9 Commercial: U.S. 370.7 383.6 Rest of the world 47.5 48.9 Total Commercial 418.2 432.5 Corporate: U.S. (b) 854.4 597.6 Rest of the world (a) — 85.4 Total Corporate 854.4 683.0 Consolidated $ 5,815.9 $ 5,566.3 ( a ) Control of a shared manufacturing facility in Mexico transferred to the Access Equipment segment effective October 1, 2019. ( b ) Primarily includes cash and short-term investments and the Company’s global headquarters.
Schedule of Net Sales by Geographical Areas	The following table presents net sales by geographic region based on product shipment destination (in millions): Fiscal Year Ended September 30, 2020 Access Equipment Defense Fire & Emergency Commercial Eliminations Total Net sales: North America $ 1,881.6 $ 2,151.1 $ 1,069.4 $ 947.0 $ (25.4 ) $ 6,023.7 Europe, Africa and Middle East 275.3 107.0 29.8 1.6 — 413.7 Rest of the World 358.2 4.1 47.9 9.2 — 419.4 Consolidated $ 2,515.1 $ 2,262.2 $ 1,147.1 $ 957.8 $ (25.4 ) $ 6,856.8 Fiscal Year Ended September 30, 2019 Access Equipment Defense Fire & Emergency Commercial Eliminations Total Net sales: North America $ 3,147.9 $ 1,946.7 $ 1,142.3 $ 997.8 $ (18.1 ) $ 7,216.6 Europe, Africa and Middle East 548.6 84.0 27.7 3.9 — 664.2 Rest of the World 383.2 1.4 96.1 20.5 — 501.2 Consolidated $ 4,079.7 $ 2,032.1 $ 1,266.1 $ 1,022.2 $ (18.1 ) $ 8,382.0 Fiscal Year Ended September 30, 2018 Access Equipment Defense Fire & Emergency Commercial Eliminations Total Net sales: North America $ 2,849.9 $ 1,612.9 $ 1,006.8 $ 1,044.6 $ (24.6 ) $ 6,489.6 Europe, Africa and Middle East 630.2 215.0 4.7 1.9 — 851.8 Rest of the World 296.7 1.0 58.2 8.2 — 364.1 Consolidated $ 3,776.8 $ 1,828.9 $ 1,069.7 $ 1,054.7 $ (24.6 ) $ 7,705.5

Unaudited Quarterly Results (Ta

Unaudited Quarterly Results (Tables)	12 Months Ended
	Sep. 30, 2020
Quarterly Financial Information Disclosure [Abstract]
Schedule of Unaudited Quarterly Results	Fiscal Year Ended September 30, 2020 4th Quarter (a) 3rd Quarter (b) 2nd Quarter (c) 1st Quarter Net sales $ 1,784.2 $ 1,580.8 $ 1,796.7 $ 1,695.1 Gross income 280.9 257.5 292.4 289.5 Operating income 127.4 118.6 133.6 109.1 Net income 100.0 80.2 68.6 75.7 Earnings per share: Basic $ 1.47 $ 1.18 $ 1.00 $ 1.11 Diluted $ 1.46 $ 1.17 $ 0.99 $ 1.10 Common Stock per share dividends $ 0.30 $ 0.30 $ 0.30 $ 0.30 (a) (b) (c) Fiscal Year Ended September 30, 2019 4th Quarter 3rd Quarter 2nd Quarter 1st Quarter (a) Net sales $ 2,195.7 $ 2,392.7 $ 1,990.2 $ 1,803.4 Gross income 397.3 433.9 357.9 328.3 Operating income 203.1 257.8 175.6 160.5 Net income 150.0 191.9 128.5 109.0 Earnings per share: Basic $ 2.20 $ 2.74 $ 1.84 $ 1.53 Diluted $ 2.17 $ 2.72 $ 1.82 $ 1.51 Common Stock per share dividends $ 0.27 $ 0.27 $ 0.27 $ 0.27 (a) The first quarter of fiscal 2019 was impacted by tax expense related to tax reform in the U.S. of $7.0 million.

Nature Of Operations - Addition

Nature Of Operations - Additional Information (Details)	12 Months Ended
	Sep. 30, 2020Segment
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Number of reportable segments of entity (in segments)	4

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Sep. 30, 2020USD ($)Step	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)
Accounting Policies [Abstract]
Research and development costs charged to expense	$ 103,900,000	$ 99,000,000	$ 99,300,000
Advertising cost	16,000,000	24,900,000	21,100,000
Amortization of Debt Issuance Costs	3,600,000	$ 1,600,000	5,600,000
Write off of Deferred Debt Issuance Cost	$ 1,800,000		$ 3,200,000
Number of steps to evaluate uncertain income tax positions (in steps) | Step	2
Minimum percentage likelihood of tax benefit being realized (as a percent)	50.00%
Maximum percentage likelihood of tax benefit being realized (as a percent)	50.00%
Amount of tax benefit realized for tax positions currently estimated to have a less than likelihood percentage of being sustained	$ 0
Maximum remaining maturity period at time of purchase of liquid investments classified as cash equivalents (in months)	3 months
Inventory valued using LIFO method (as a percent)	83.00%	84.00%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Additional Information (Details 2) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Summary Of Significant Accounting Policies [Line Items]
Percentage of importance to income approach used for evaluation of recoverability of goodwill (as a percent)	75.00%
Net foreign currency transaction gains (losses) related to continuing operations	$ (2.7)	$ 2.1	$ (3.8)
Minimum | Buildings and Improvements
Summary Of Significant Accounting Policies [Line Items]
Useful life	10 years
Minimum | Machinery and Equipment
Summary Of Significant Accounting Policies [Line Items]
Useful life	4 years
Minimum | Software and Related Costs
Summary Of Significant Accounting Policies [Line Items]
Useful life	3 years
Maximum | Buildings and Improvements
Summary Of Significant Accounting Policies [Line Items]
Useful life	40 years
Maximum | Machinery and Equipment
Summary Of Significant Accounting Policies [Line Items]
Useful life	25 years
Maximum | Software and Related Costs
Summary Of Significant Accounting Policies [Line Items]
Useful life	10 years

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Schedule of Effect of New Leasing Standard to Condensed Consolidated Financial Statements (Details) - USD ($) $ in Millions	Sep. 30, 2020	Oct. 01, 2019	Sep. 30, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Other current assets	$ 106.3		$ 78.9
Total current assets	3,535.8		3,408.3
Other long-term assets	286.5		156.4
Total assets	5,815.9		5,566.3
Other current liabilities	345.2		307.3
Total current liabilities	1,585.1		1,741.9
Other long-term liabilities	562.2		405.6
Total liabilities and shareholders’ equity	$ 5,815.9		$ 5,566.3
Accounting Standards Update 2016-02
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Other current assets		$ 78.4
Total current assets		3,407.8
Other long-term assets		335.9
Total assets		5,745.3
Other current liabilities		353.7
Total current liabilities		1,788.3
Other long-term liabilities		538.2
Total liabilities and shareholders’ equity		5,745.3
Accounting Standards Update 2016-02 | Impact of New Lease Standard
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Other current assets		(0.5)
Total current assets		(0.5)
Other long-term assets		179.5
Total assets		179
Other current liabilities		46.4
Total current liabilities		46.4
Other long-term liabilities		132.6
Total liabilities and shareholders’ equity		$ 179

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Fire & Emergency
Disaggregation Of Revenue [Line Items]
Interest Expense, Customer Deposits	$ 15.6	$ 14.5	$ 18.1
Customer Concentration Risk | Sales Revenue, Net | Defense | DoD
Disaggregation Of Revenue [Line Items]
Concentration Risk, Percentage	98.00%	97.00%	90.00%

Revenue Recognition - Schedule

Revenue Recognition - Schedule of Changes Within Defense Segment Due to Contract Adjustments (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Abstract]
Net sales	$ 31.2	$ 63.9	$ 2.2
Operating income	16.2	44.7	2.2
Net income	$ 12.4	$ 34.5	$ 1.7
Diluted earnings per share	$ 0.18	$ 0.49	$ 0.02

Revenue Recognition - Disaggreg

Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended												12 Months Ended
	Sep. 30, 2020	[1]	Jun. 30, 2020	[2]	Mar. 31, 2020	[3]	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	[4]	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Line Items]
Net sales	$ 1,784.2		$ 1,580.8		$ 1,796.7		$ 1,695.1	$ 2,195.7	$ 2,392.7	$ 1,990.2	$ 1,803.4		$ 6,856.8	$ 8,382	$ 7,705.5
Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales													(25.4)	(18.1)	(24.6)
Transferred at Point in Time
Disaggregation Of Revenue [Line Items]
Net sales													4,078.1	5,801.1
Transferred at Point in Time | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales													(26.8)	(20.1)
Transferred over Time
Disaggregation Of Revenue [Line Items]
Net sales													2,778.7	2,580.9
Transferred over Time | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales													1.4	2
Access Equipment
Disaggregation Of Revenue [Line Items]
Net sales													2,505.7	4,079.7	3,776.8
Access Equipment | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales													2,515.1	4,079.7	3,776.8
Access Equipment | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales													9.4
Access Equipment | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales													2,437.5	4,001.6
Access Equipment | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales													77.6	78.1
Defense
Disaggregation Of Revenue [Line Items]
Net sales													2,260.3	2,030.3	1,827.3
Defense | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales													2,262.2	2,032.1	1,828.9
Defense | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales													1.9	1.8	1.6
Defense | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales													6.8	7.4
Defense | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales													2,255.4	2,024.7
Fire & Emergency
Disaggregation Of Revenue [Line Items]
Net sales													1,138.1	1,249.8	1,053.6
Fire & Emergency | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales													1,147.1	1,266.1	1,069.7
Fire & Emergency | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales													9	16.3	16.1
Fire & Emergency | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales													1,103.9	1,220.5
Fire & Emergency | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales													43.2	45.6
Commercial
Disaggregation Of Revenue [Line Items]
Net sales													951.3	1,020.1	1,046.8
Commercial | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales													957.8	1,022.2	1,054.7
Commercial | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales													6.5	2.1	$ 7.9
Commercial | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales													556.7	591.7
Commercial | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales													$ 401.1	$ 430.5
[1]
[2]
[3]
[4]	The first quarter of fiscal 2019 was impacted by tax expense related to tax reform in the U.S. of $7.0 million.

Revenue Recognition - Schedul_2

Revenue Recognition - Schedule of Contract Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Contract With Customer Liability [Abstract]
Customer advances	$ 491.4	$ 382
Other current liabilities	59.5	78.2
Other long-term liabilities	53.7	52.3
Total contract liabilities	$ 604.6	$ 512.5

Revenue Recognition - Schedul_3

Revenue Recognition - Schedule of Contract Liabilities Recognized in Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Contract With Customer Liability [Abstract]
Beginning liabilities recognized in revenue	$ 441	$ 530.9

Revenue Recognition - Schedul_4

Revenue Recognition - Schedule of Changes in Warranty Liability and Unearned Extended Warranty Premiums (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Disaggregation Of Revenue [Abstract]
Balance at beginning of period	$ 68.2	$ 30.7
Adoption of ASC 606		35.7
Deferred revenue for new service-type warranties	23.6	27.5
Amortization of deferred revenue	(27.9)	(25.2)
Foreign currency translation	0.5	(0.5)
Balance at end of period	$ 64.4	$ 68.2

Revenue Recognition - Schedul_5

Revenue Recognition - Schedule of Classification of Service-type Warranties in Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Extended Product Warranty Accrual Balance Sheet Classification [Abstract]
Service-type warranties, other current liabilities	$ 24.7	$ 27.8
Service-type warranties, other long-term liabilities	39.7	40.4
Service-type warranties	$ 64.4	$ 68.2	$ 30.7

Revenue Recognition - Additio_2

Revenue Recognition - Additional Information (Details 1) $ in Millions	Sep. 30, 2020USD ($)
Disaggregation Of Revenue [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 3,900
Transaction price allocated to performance obligations to be satisfied during fiscal 2021	3,100
Transaction price allocated to performance obligations to be satisfied during fiscal 2022	649.1
Transaction price allocated to performance obligations to be satisfied beyond fiscal 2022	$ 159.6

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Oct. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award
Common stock reserved for issuance stock awards (in shares)		5,771,194
Income tax benefit recognized for stock-based compensation		$ 3.6	$ 4.9	$ 5.8
Stock options
Share-based Compensation Arrangement by Share-based Payment Award
Tenure of award (in years)		3 years
Share-based compensation arrangement by share-based payment award, vesting period		10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 18.5	10.2	23.2
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options		4.3	$ 2.4	$ 6.3
Unrecognized compensation expense		$ 2.6
Weighted-average period for unrecognized compensation expense to be recognized (in years)		1 year 10 months 24 days
Weighted-average per share fair values for stock option granted (in dollars per share)		$ 26.16	$ 20	$ 26.84
Nonvested Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Unrecognized compensation expense		$ 8.4
Weighted-average period for unrecognized compensation expense to be recognized (in years)		1 year 10 months 24 days
Fair value of shares vested		$ 18.6	$ 12.3	$ 13.2
Income tax benefit recognized for stock-based compensation		$ 3.1	$ 2.1	$ 3
Weighted-average fair value, nonvested performance shares		$ 79.44	$ 72.66	$ 69.15	$ 55.22
Granted (in shares)		183,725	278,175	163,225
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation arrangement by share-based payment award, vesting period		3 years
Unrecognized compensation expense		$ 6.7
Weighted-average period for unrecognized compensation expense to be recognized (in years)		1 year 9 months 18 days
Share-based compensation arrangement by share-based payment award, vesting description		Performance share awards generally vest over a three-year service period following the grant date. Performance shares vest under two separate measurement criteria. The first type vest only if the Company’s total shareholder return (TSR) over the three year term of the awards compares favorably to that of a comparator group of companies. The second type vest only if the Company’s return on invested capital (ROIC) over the vesting period compares favorably to that of a comparator group of companies.
Performance Shares [Member] | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	68,125
Performance Shares [Member] | Shareholder Return [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Weighted-average fair value, nonvested performance shares		$ 137.74	$ 85.89	$ 112.30
Nonvested Performance Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Fair value of shares vested		$ 6.9	$ 5.8	$ 7.6
Income tax benefit recognized for stock-based compensation		$ 0.2	$ 1.4	$ 2.1
Period over which shareholder return compares favorably to that of a competitor group of companies for purposes of calculating executive performance shares earned (in years)		3 years
Potential payouts, low end of range (as a percent)		0.00%
Potential payouts, high end of range (as a percent)		200.00%
Weighted-average fair value, nonvested performance shares		$ 89.54	$ 84.10	$ 89.11	$ 60.71
Granted (in shares)		55,325	73,950	57,625
Nonvested Performance Share Awards [Member] | Shareholder Return [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percent		111.00%	126.00%	200.00%
Nonvested Performance Share Awards [Member] | Return on Invested Capital [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percent		200.00%	200.00%	191.00%
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 0.7	$ 0.6	$ 3.8
Granted (in shares)		14,875	18,250	11,650
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Fair value of shares vested		$ 0.8	$ 0.4	$ 0.4
Granted (in shares)		7,925	8,350	8,125

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Equity-Based Compensation Plans (Details) - $ / shares	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Equity-based compensation plans
Number of Securities to be Issued Upon Exercise of Outstanding Options or Vesting of Performance Share Awards (in shares)	1,731,277
Weighted-Average Exercise Price of Outstanding Options (in dollars per share)	$ 74.38	$ 62.62	$ 57.03	$ 45.14
Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans (in shares)	4,039,917
Equity compensation plans approved by security holders [Member]
Equity-based compensation plans
Number of Securities to be Issued Upon Exercise of Outstanding Options or Vesting of Performance Share Awards (in shares)	1,731,277
Weighted-Average Exercise Price of Outstanding Options (in dollars per share)	$ 74.38
Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans (in shares)	4,039,917
Equity Compensation Plans Not Approved By Security Holders [Member]
Equity-based compensation plans
Number of Securities to be Issued Upon Exercise of Outstanding Options or Vesting of Performance Share Awards (in shares)	0
Weighted-Average Exercise Price of Outstanding Options (in dollars per share)	$ 0
Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans (in shares)	0

Stock-Based Compensation - Sc_2

Stock-Based Compensation - Schedule of Stock-Based Compensation Expense (Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Equity-based compensation plans
Stock-based compensation expense	$ 30.2	$ 30	$ 26.9
Income tax benefit recognized for stock-based compensation	(3.6)	(4.9)	(5.8)
Stock-based compensation cost, net of tax	26.6	25.1	21.1
Stock options
Equity-based compensation plans
Stock-based compensation expense	6.8	6.9	6.6
Nonvested Stock Awards [Member]
Equity-based compensation plans
Stock-based compensation expense	15.8	15	13.7
Income tax benefit recognized for stock-based compensation	(3.1)	(2.1)	(3)
Performance Shares [Member]
Equity-based compensation plans
Stock-based compensation expense	6.7	7.1	6.4
Stock Appreciation Rights (SARs)
Equity-based compensation plans
Stock-based compensation expense	0.2	0.4	(0.2)
Restricted Stock Units (RSUs)
Equity-based compensation plans
Stock-based compensation expense	$ 0.7	$ 0.6	$ 0.4

Stock-Based Compensation - Sc_3

Stock-Based Compensation - Schedule of Stock Option Activity (Details) - $ / shares	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Options
Options outstanding, beginning of year (in shares)	1,328,390	1,268,984	1,531,691
Options granted (in shares)	301,025	372,450	261,900
Options forfeited (in shares)	(40,965)	(24,175)	(43,270)
Options expired (in shares)	(5,869)	(8,721)	(1)
Options exercised (in shares)	(499,179)	(280,148)	(481,336)
Options outstanding, end of year (in shares)	1,083,402	1,328,390	1,268,984
Options exercisable, end of year (in shares)	537,241	709,826	650,143
Weighted-Average Exercise Price
Options outstanding, beginning of year (in dollars per share)	$ 62.62	$ 57.03	$ 45.14
Options granted (in dollars per share)	90.28	66.09	86.59
Options forfeited (in dollars per share)	79	72.88	66.49
Options expired (in dollars per share)	84.25	76.92	41.52
Options exercised (in dollars per share)	52.18	40.62	34.41
Options outstanding, end of year (in dollars per share)	74.38	62.62	57.03
Options exercisable, end of year (in dollars per share)	$ 68.16	$ 55.11	$ 45.92

Stock-Based Compensation - Sc_4

Stock-Based Compensation - Schedule of Outstanding Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award
Stock Option Awards Outstanding, Number Outstanding (in shares)	1,083,402	1,328,390	1,268,984	1,531,691
Stock Option Awards Outstanding, Weighted-Average Remaining Contractual Life, (in years)	6 years 8 months 12 days
Weighted-Average Exercise Price of Outstanding Options (in dollars per share)	$ 74.38	$ 62.62	$ 57.03	$ 45.14
Stock Option Awards Outstanding, Aggregate Intrinsic Value	$ 6.5
Stock Option Awards Exercisable, Number Exercisable (in shares)	537,241	709,826	650,143
Stock Option Awards Exercisable, Weighted-Average Remaining Contractual Life (in years)	4 years 10 months 24 days
Options exercisable, end of year (in dollars per share)	$ 68.16	$ 55.11	$ 45.92
Stock Option Awards Exercisable, Aggregate Intrinsic Value	$ 4.9
Price Range, $40.00 - $60.00
Share-based Compensation Arrangement by Share-based Payment Award
Stock Option Awards Outstanding, Exercise Prices, Low End of Range (in dollars per share)	$ 40
Stock Option Awards Outstanding, Exercise Prices, High End of Range (in dollars per share)	$ 60
Stock Option Awards Outstanding, Number Outstanding (in shares)	99,514
Stock Option Awards Outstanding, Weighted-Average Remaining Contractual Life, (in years)	1 year 8 months 12 days
Weighted-Average Exercise Price of Outstanding Options (in dollars per share)	$ 43.26
Stock Option Awards Outstanding, Aggregate Intrinsic Value	$ 3
Stock Option Awards Exercisable, Number Exercisable (in shares)	99,514
Stock Option Awards Exercisable, Weighted-Average Remaining Contractual Life (in years)	1 year 8 months 12 days
Options exercisable, end of year (in dollars per share)	$ 43.26
Stock Option Awards Exercisable, Aggregate Intrinsic Value	$ 3
Price Range, $60.01 - $80.00
Share-based Compensation Arrangement by Share-based Payment Award
Stock Option Awards Outstanding, Exercise Prices, Low End of Range (in dollars per share)	$ 60.01
Stock Option Awards Outstanding, Exercise Prices, High End of Range (in dollars per share)	$ 80
Stock Option Awards Outstanding, Number Outstanding (in shares)	493,958
Stock Option Awards Outstanding, Weighted-Average Remaining Contractual Life, (in years)	6 years 2 months 12 days
Weighted-Average Exercise Price of Outstanding Options (in dollars per share)	$ 66.41
Stock Option Awards Outstanding, Aggregate Intrinsic Value	$ 3.5
Stock Option Awards Exercisable, Number Exercisable (in shares)	282,819
Stock Option Awards Exercisable, Weighted-Average Remaining Contractual Life (in years)	4 years 8 months 12 days
Options exercisable, end of year (in dollars per share)	$ 66.64
Stock Option Awards Exercisable, Aggregate Intrinsic Value	$ 1.9
Price Range, $80.01 - $100.00
Share-based Compensation Arrangement by Share-based Payment Award
Stock Option Awards Outstanding, Exercise Prices, Low End of Range (in dollars per share)	$ 80.01
Stock Option Awards Outstanding, Exercise Prices, High End of Range (in dollars per share)	$ 100
Stock Option Awards Outstanding, Number Outstanding (in shares)	489,930
Stock Option Awards Outstanding, Weighted-Average Remaining Contractual Life, (in years)	8 years 3 months 18 days
Weighted-Average Exercise Price of Outstanding Options (in dollars per share)	$ 88.73
Stock Option Awards Exercisable, Number Exercisable (in shares)	154,908
Stock Option Awards Exercisable, Weighted-Average Remaining Contractual Life (in years)	7 years 3 months 18 days
Options exercisable, end of year (in dollars per share)	$ 86.93

Stock-Based Compensation - Sc_5

Stock-Based Compensation - Schedule of Weighted-Average Assumptions Used to Value Options (Details) - Stock options	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Assumptions:
Expected term (in years)	5 years 4 months 24 days	5 years 4 months 24 days	5 years 4 months 24 days
Expected volatility (as a percent)	34.10%	33.40%	34.50%
Risk-free interest rate (as a percent)	1.63%	2.87%	2.09%
Expected dividend yield (as a percent)	1.37%	1.50%	1.15%

Stock-Based Compensation - Sc_6

Stock-Based Compensation - Schedule of Nonvested Stock Activity (Details) - Nonvested Stock Awards [Member] - $ / shares	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Number of Shares
Nonvested, beginning of year (in shares)	411,510	332,473	352,159
Granted (in shares)	183,725	278,175	163,225
Forfeited (in shares)	(27,076)	(13,610)	(26,915)
Vested (in shares)	(221,351)	(185,528)	(155,996)
Nonvested, end of year (in shares)	346,808	411,510	332,473
Weighted-Average Per Share Fair Value
Nonvested, beginning of year (in dollars per share)	$ 72.66	$ 69.15	$ 55.22
Granted (in dollars per share)	87.82	69.98	86.07
Forfeited (in dollars per share)	80.57	71.17	65.66
Vested (in dollars per share)	73.64	62.47	56.02
Nonvested, end of year (in dollars per share)	$ 79.44	$ 72.66	$ 69.15

Stock-Based Compensation - Sc_7

Stock-Based Compensation - Schedule of Nonvested Performance-Based Units Activity (Details) - Nonvested Performance Share Awards [Member] - $ / shares	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Number of Shares
Nonvested, beginning of year (in shares)	124,750	98,375	116,600
Granted (in shares)	55,325	73,950	57,625
Forfeited (in shares)	(16,615)	(1,600)	(13,977)
Performance adjustments (in shares)	33,941	31,768	57,914
Vested (in shares)	(86,951)	(77,743)	(119,787)
Nonvested, end of year (in shares)	110,450	124,750	98,375
Weighted-Average Per Share Fair Value
Nonvested, beginning of year (in dollars per share)	$ 84.10	$ 89.11	$ 60.71
Granted (in dollars per share)	109.09	74.70	97.79
Forfeited (in dollars per share)	92.88	93.92	71.75
Performance adjustments (in dollars per share)	87.44	71.43	47.50
Vested (in dollars per share)	92.73	76.12	47.55
Nonvested, end of year (in dollars per share)	$ 89.54	$ 84.10	$ 89.11

Stock-Based Compensation - Sc_8

Stock-Based Compensation - Schedule of Weighted-Average Assumptions to Estimate Grant Date Fair Values (Details) - Shareholder Return [Member] - Performance Shares [Member]	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Assumptions:
Expected term (in years)	2 years 10 months 13 days	2 years 10 months 9 days	2 years 10 months 9 days
Expected volatility (as a percent)	31.16%	32.72%	32.27%
Risk-free interest rate (as a percent)	1.59%	2.80%	1.84%

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2025
Defined Benefit Plan Disclosure [Line Items]
Prior service cost included in accumulated other comprehensive loss	$ 2.3
Prior service cost included in accumulated other comprehensive loss, net of tax	1.7
Unrecognized net actuarial losses included in accumulated other comprehensive loss	4.9
Unrecognized net actuarial losses included in accumulated other comprehensive loss, net of tax	$ 3.7
Health care cost trend rate
Health care cost trend rate (as a percent)	6.50%
Increase in accumulated postretirement benefit obligation with 100 basis points increase in health care cost trend rate	$ 9.9
Increase in net periodic postretirement benefit cost with 100 basis points increase in health care cost trend rate	0.8
Decrease in accumulated postretirement benefit obligation with 100 basis points decrease in health care cost trend rate	7.5
Decrease in net periodic postretirement benefit cost with 100 basis points decrease in health care cost trend rate	0.6
Defined benefit plan, expected future employer contributions, next fiscal year	$ 25
Multi-Employer Pension Plans
Multiemployer plans, collective-bargaining arrangement, expiration date	May 1, 2022
Maximum Percent of Total Plan Contributions Contributed to Multi-employer Plan	5.00%	5.00%	5.00%
Multiemployer plan period contributions	$ 1.5	$ 1.4	$ 1.3
401(k) plans
Amounts expensed (income recognized) for matching and discretionary contributions	39.5	43.3	42.9
Scenario Forecast
Health care cost trend rate
Health care cost trend rate (as a percent)				5.00%
Supplemental Executive Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Trust held assets	21.4
Defined contribution SERP expense	$ 1.6	$ 1.6	$ 2
Minimum
401(k) plans
Percentage contribution by employees for defined contribution 401(k) plans, low end of range (as a percent)	2.00%
Employer contribution	2.00%
Maximum
401(k) plans
Percentage contribution by employees for defined contribution 401(k) plans, low end of range (as a percent)	100.00%
Employer contribution	6.00%

Employee Benefit Plans - Schedu

Employee Benefit Plans - Schedule of Changes in The Benefit Obligations and Plan Assets, The Funded Status of The Plans and The Amounts Recognized in The Balance Sheet (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 601.1	$ 542.8
Change in projected benefit obligation
Benefit obligation at the beginning of the period	546.5	455.8
Service cost	10.1	9.1	$ 10.5
Interest cost	17.1	18.7	17.9
Actuarial loss (gain)	44	77.4
Participant contributions		0.1
Plan amendments	9.8	0.2
Curtailments		1.2
Benefits paid	(15.8)	(14.1)
Currency translation adjustments	1.9	(1.9)
Benefit obligation at the end of the period	613.6	546.5	455.8
Change in plan assets
Fair value of plan assets at the beginning of the period	408.9	384.2
Actual return on plan assets	35.4	33.9
Company contributions	11.4	8.8
Participant contributions		0.1
Expenses paid	(4.3)	(2.2)
Benefits paid	(15.8)	(14.1)
Currency translation adjustments	1.7	(1.8)
Fair value of plan assets at the end of the period	437.3	408.9	384.2
Funded status of plan - underfunded at September 30	(176.3)	(137.6)
Recognized in consolidated balance sheet at September 30
Accrued benefit liability (current liability)	(1.9)	(1.8)
Accrued benefit liability (long-term liability)	(174.4)	(135.8)
Total	(176.3)	(137.6)
Postretirement Health and Other
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	53.3	51.4
Change in projected benefit obligation
Benefit obligation at the beginning of the period	51.4	46.6
Service cost	3.5	3.1	3.7
Interest cost	1.6	1.9	1.8
Actuarial loss (gain)	5.4	1.4
Plan amendments	(6.5)
Benefits paid	(2.1)	(1.6)
Benefit obligation at the end of the period	53.3	51.4	$ 46.6
Change in plan assets
Company contributions	2.1	1.6
Benefits paid	(2.1)	(1.6)
Funded status of plan - underfunded at September 30	(53.3)	(51.4)
Recognized in consolidated balance sheet at September 30
Accrued benefit liability (current liability)	(2.5)	(1.2)
Accrued benefit liability (long-term liability)	(50.8)	(50.2)
Total	$ (53.3)	$ (51.4)

Employee Benefit Plans - Sche_2

Employee Benefit Plans - Schedule of Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Pension Benefits
Recognized in accumulated other comprehensive income (loss) as of September 30 (net of taxes)
Net actuarial (loss) gain	$ (89)	$ (68.9)
Prior service (cost) benefit	(13.4)	(7)
Total	(102.4)	(75.9)
Postretirement Health and Other
Recognized in accumulated other comprehensive income (loss) as of September 30 (net of taxes)
Net actuarial (loss) gain	(6.1)	(1.9)
Prior service (cost) benefit	12.6	8.4
Total	$ 6.5	$ 6.5

Employee Benefit Plans - Sche_3

Employee Benefit Plans - Schedule of Weighted Average Assumptions (Details)	Sep. 30, 2020	Sep. 30, 2019
Pension Benefits
Weighted-average assumptions as of September 30
Discount rate	2.71%	3.17%
Expected return on plan assets	4.89%	5.49%
Postretirement Health and Other
Weighted-average assumptions as of September 30
Discount rate	2.36%	3.10%

Employee Benefit Plans - Sche_4

Employee Benefit Plans - Schedule of Benefit Obligations in Excess of Plan Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets [Abstract]
Projected benefit obligation	$ 613.6	$ 546.5
Accumulated benefit obligation	601.1	542.8
Fair value of plan assets	$ 437.3	$ 408.9

Employee Benefit Plans - Sche_5

Employee Benefit Plans - Schedule of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Pension Benefits
Components of net periodic benefit cost
Service cost	$ 10.1	$ 9.1	$ 10.5
Interest cost	17.1	18.7	17.9
Expected return on plan assets	(20.6)	(19.9)	(20.1)
Amortization of prior service cost (benefit)	1.6	1.7	1.8
Curtailment/settlement	0.1	1.2
Amortization of net actuarial loss (gain)	3.3	0.2	1.9
Expenses paid	4	2.5	1.9
Net periodic benefit cost	15.6	13.5	13.9
Other changes in plan assets and benefit obligations recognized in other comprehensive income
Net actuarial loss (gain)	29.4	63.3	(35.9)
Prior service cost (benefit)	9.8	0.2
Amortization of prior service benefit (cost)	(1.6)	(1.7)	(1.8)
Amortization of net actuarial (loss) gain	(3.3)	(0.2)	(1.9)
Total	$ 34.3	$ 61.6	$ (39.6)
Weighted-average assumptions
Discount rate	3.17%	4.18%	3.85%
Expected return on plan assets	5.49%	5.50%	5.93%
Postretirement Health and Other
Components of net periodic benefit cost
Service cost	$ 3.5	$ 3.1	$ 3.7
Interest cost	1.6	1.9	1.8
Amortization of prior service cost (benefit)	(0.9)	(1.5)	(0.9)
Amortization of net actuarial loss (gain)	(0.2)	(0.2)	0.1
Net periodic benefit cost	4	3.3	4.7
Other changes in plan assets and benefit obligations recognized in other comprehensive income
Net actuarial loss (gain)	5.5	1.4	(6.5)
Prior service cost (benefit)	(6.5)		(0.6)
Amortization of prior service benefit (cost)	0.9	1.5	0.9
Amortization of net actuarial (loss) gain	0.2	0.2	(0.1)
Total	$ 0.1	$ 3.1	$ (6.3)
Weighted-average assumptions
Discount rate	3.10%	4.20%	3.71%

Employee Benefit Plans - Sche_6

Employee Benefit Plans - Schedule of Pension Plan Asset and Target Allocation (Details) - Pension Benefits	Sep. 30, 2020
Asset Category
Total assets (as a percent)	100.00%
Fixed income
Asset Category
Total assets (as a percent)	47.00%
Large-cap Equity
Asset Category
Total assets (as a percent)	24.00%
Mid-cap Equity
Asset Category
Total assets (as a percent)	11.00%
Small-cap Equity
Asset Category
Total assets (as a percent)	7.00%
Global Equity
Asset Category
Total assets (as a percent)	7.00%
Other
Asset Category
Total assets (as a percent)	4.00%
Minimum | Fixed income
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	40.00%
Minimum | Large-cap Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	20.00%
Minimum | Mid-cap Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	5.00%
Minimum | Small-cap Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	5.00%
Minimum | Global Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	5.00%
Minimum | Other
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0.00%
Maximum | Fixed income
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	50.00%
Maximum | Large-cap Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	30.00%
Maximum | Mid-cap Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	15.00%
Maximum | Small-cap Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	10.00%
Maximum | Global Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	10.00%
Maximum | Other
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	10.00%

Employee Benefit Plans - Sche_7

Employee Benefit Plans - Schedule of Fair Value of Plan Assets by Major Category and Level Within Fair Value Hierarchy (Details) - Pension Benefits - USD ($) $ in Millions		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value		$ 437.3	$ 408.9	$ 384.2
Level 1
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value		171.4	160.3
Level 1 | U.S. companies
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[1]	77.4	75.9
Level 1 | Mutual Funds
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[1]	81.5	72.7
Level 1 | Money market funds
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[2]	12.5	11.7
Level 2
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value		37.6	34.7
Level 2 | U.S. companies
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[1]	8.1	6.9
Level 2 | International companies
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[3]	13.5	13.3
Level 2 | Government and agency bonds
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[4]	7.7	7
Level 2 | Corporate bonds and notes
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[5]	8.3	7.5
Level 3
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value		0.8	0.7
Level 3 | Other
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value		0.8	0.7
Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value		209.8	195.7
Fair Value, Inputs, Level 1, 2 and 3 | U.S. companies
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[1]	85.5	82.8
Fair Value, Inputs, Level 1, 2 and 3 | International companies
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[3]	13.5	13.3
Fair Value, Inputs, Level 1, 2 and 3 | Mutual Funds
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[1]	81.5	72.7
Fair Value, Inputs, Level 1, 2 and 3 | Government and agency bonds
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[4]	7.7	7
Fair Value, Inputs, Level 1, 2 and 3 | Corporate bonds and notes
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[5]	8.3	7.5
Fair Value, Inputs, Level 1, 2 and 3 | Money market funds
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[2]	12.5	11.7
Fair Value, Inputs, Level 1, 2 and 3 | Other
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value		0.8	0.7
Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Total assets - at fair value	[6]	$ 227.5	$ 213.2
[1]	Primarily valued using a market approach based on the quoted market prices of identical instruments that are actively traded on public exchanges.
[2]	These investments largely consist of short-term investment funds and are valued using a market approach based on the quoted market prices of identical instruments.
[3]	Valuation model looks at underlying security “best” price, exchange rate for underlying security’s currency against the U.S. dollar and ratio of underlying security to American depository receipt.
[4]	These investments consist of debt securities issued by the U.S. Treasury, U.S. government agencies and U.S. government-sponsored enterprises and have a variety of structures, coupon rates and maturities. These investments are considered to have low default risk as they are guaranteed by the U.S. government. Fixed income securities are primarily valued using a market approach with inputs that include broker quotes, benchmark yields, base spreads and reported trades.
[5]	These investments consist of debt obligations issued by a variety of private and public corporations. These are investment grade securities which historically have provided a steady stream of income. Fixed income securities are primarily valued using a market approach with inputs that include broker quotes, benchmark yields, base spreads and reported trades.
[6]	These investments consist of privately placed funds that are valued based on NAV. NAV of the funds is based on the fair value of each funds underlying investments. In accordance with ASC Subtopic 820-10, certain investments that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy.

Employee Benefit Plans - Fair V

Employee Benefit Plans - Fair Value, Investments, Entities that Calculate Net Asset Value Per Share (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Redemption Notice Period	[1]	15 days	15 days
Pension Plan, Defined Benefit
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair Value		$ 227.5	$ 213.2
[1]	Represents the maximum redemption period. A portion of the investment does not have any redemption period restrictions.

Employee Benefit Plans - Sche_8

Employee Benefit Plans - Schedule of Estimated Future Benefit Payments (Details) $ in Millions	Sep. 30, 2020USD ($)
Pension Benefits | Qualified
Estimated future benefit payment under company sponsored plans
2021	$ 15.7
2022	17.2
2023	18.9
2024	20.4
2025	21.9
2026-2030	128.4
Pension Benefits | Non-Qualified
Estimated future benefit payment under company sponsored plans
2021	1.9
2022	1.9
2023	2
2024	2
2025	1.9
2026-2030	10
Postretirement Health and Other
Estimated future benefit payment under company sponsored plans
2021	2.5
2022	3
2023	3.1
2024	3.6
2025	3.4
2026-2030	$ 20.9

Income Taxes - Schedule of Pre-

Income Taxes - Schedule of Pre-tax Income (Loss) from Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Pre-tax income (loss) from continuing operations
Domestic	$ 429.7	$ 697.9	$ 514.9
Foreign	9.4	52.8	79.7
Income before income taxes and earnings (losses) of unconsolidated affiliates	$ 439.1	$ 750.7	$ 594.6

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Provision for (Benefit from) Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Current:
Federal	$ 70.1	$ 140.9	$ 92
Foreign	8.2	(0.2)	22
State	12.1	20.2	12.9
Total current	90.4	160.9	126.9
Deferred:
Federal	14.3	2.1	5.4
Foreign	9.7	7.3	(5.5)
State	(1.6)	1	(3)
Total deferred	22.4	10.4	(3.1)
Provision for income taxes	112.8	171.3	123.8
Allocated to Other Comprehensive Income (Loss)
Deferred federal, state and foreign	$ 8.8	$ (14.9)	$ 11

Income Taxes - Schedule of Reco

Income Taxes - Schedule of Reconciliation of Income Tax Computed at U.S. Federal Statutory Tax Rates to Income Tax Expense (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Effective Rate Reconciliation
U.S. federal tax rate	35.00%	21.00%	21.00%	24.50%
State income taxes, net		2.80%	2.50%	2.10%
Foreign taxes		0.80%	(0.20%)	1.00%
Valuation allowance		3.30%	(0.10%)	(1.40%)
Domestic tax credits		(3.20%)	(1.00%)	(2.10%)
Manufacturing deduction		0.00%	(0.10%)	(1.60%)
Foreign-derived intangible income deduction		(0.40%)	(1.00%)	0.00%
Share-based compensation		0.00%	0.10%	(0.70%)
Remeasurement of deferred taxes - U.S. Tax Reform		0.00%	0.00%	(5.10%)
Mandatory repatriation tax - U.S. Tax Reform		0.00%	0.70%	3.30%
Other, net		1.40%	0.90%	0.80%
Effective income tax rate		25.70%	22.80%	20.80%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2021
Income Tax Disclosure [Line Items]
Income tax expense (benefits), tax credit, discrete items		$ 8	$ 1.9	$ (21.7)
Income tax expense (benefit), discrete items, percentage of pre-tax income		1.80%	0.30%	(3.60%)
Effective income tax rate reconciliation, at federal statutory income tax rate, percent	35.00%	21.00%	21.00%	24.50%
Tax cuts and jobs act, change in tax rate, income tax expense (benefit)				$ (30.2)
Tax cuts and jobs act, deferred tax asset		$ 44.8	$ 44.8
Tax cuts and jobs act, income tax payable		61	61
Deferred tax assets, valuation allowance		17.4	1.1
Undistributed earnings in non-U.S. subsidiaries		392.5
Foreign and domestic income taxes and withholding taxes		24.3
Potential tax liability		18.4
Net unrecognized tax benefits, excluding interest and penalties that would affect the company's net income if recognized		17.2
Interest and penalties		1.3	0.1	$ (3.7)
Accruals for payment of interest and penalties		5.7	$ 4.4
Scenario Forecast
Income Tax Disclosure [Line Items]
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit					$ 7.3
Foreign Tax Authority
Income Tax Disclosure [Line Items]
Valuation allowance on foreign net deferred tax assets		11.5
Operating loss carryforwards		$ 42
Tax credit carryforwards, foreign expiration period, minimum		7 years
Deferred tax assets, operating loss carryforwards		$ 10.7
Deferred tax assets, valuation allowance		17.4
State and Local Jurisdiction
Income Tax Disclosure [Line Items]
Operating loss carryforwards		$ 167.7
Tax credit carryforwards, state expiration period, minimum		5 years
Tax credit carryforward, amount		$ 25.8
Tax credit carryforwards, expiration year start		2026
Tax credit carryforwards, expiration year end		2035
Deferred tax assets, operating loss carryforwards		$ 6.6
Deferred tax assets, tax credit carryforwards		$ 17.2

Income Taxes - Components of De

Income Taxes - Components of Deferred Income Tax assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Deferred tax assets:
Other long-term liabilities	$ 127	$ 126
Losses and credits	34.8	27.9
Accrued warranty	15.8	14.5
Other current liabilities	17.7	15
Payroll-related obligations	18.5	23.4
Other	6	9.4
Gross deferred tax assets	219.8	216.2
Less valuation allowance	(17.4)	(1.1)
Deferred tax assets, net	202.4	215.1
Deferred tax liabilities:
Intangible assets	(42.2)	(40)
Property, plant and equipment	(55.9)	(50.5)
Inventories	(18.6)	(14.1)
Other	(7.1)	(2.6)
Deferred tax liabilities	(123.8)	(107.2)
Deferred tax assets, net of deferred tax liabilities	$ 78.6	$ 107.9

Income Taxes - Schedule of Clas

Income Taxes - Schedule of Classification of Deferred Tax Asset in Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Long-term net deferred tax asset	$ 78.6	$ 107.9
Deferred tax assets, net of deferred tax liabilities	$ 78.6	$ 107.9

Income Taxes - Schedule of Re_2

Income Taxes - Schedule of Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Balance at beginning of year	$ 97.3	$ 33.7	$ 37.2
Additions for tax positions related to current year	46.2	63.3	4.2
Additions for tax positions related to prior years	1.4	5.4	5.4
Reductions for tax positions related to prior years	(61.8)	(0.8)	(7.1)
Settlements	(1.3)	(0.9)	(4.1)
Lapse of statutes of limitations	(2)	(3.4)	(1.9)
Balance at end of year	$ 79.8	$ 97.3	$ 33.7

Income Taxes - Schedule of Tax

Income Taxes - Schedule of Tax Years Open for Examination Under Applicable Statutes (Details)	12 Months Ended
	Sep. 30, 2020
Earliest Tax Year | Australia
Income Tax Examination [Line Items]
Open tax year	2013
Earliest Tax Year | Belgium
Income Tax Examination [Line Items]
Open tax year	2018
Earliest Tax Year | Brazil
Income Tax Examination [Line Items]
Open tax year	2015
Earliest Tax Year | Canada
Income Tax Examination [Line Items]
Open tax year	2016
Earliest Tax Year | China
Income Tax Examination [Line Items]
Open tax year	2015
Earliest Tax Year | Mexico
Income Tax Examination [Line Items]
Open tax year	2016
Earliest Tax Year | Romania
Income Tax Examination [Line Items]
Open tax year	2014
Earliest Tax Year | Netherlands
Income Tax Examination [Line Items]
Open tax year	2014
Earliest Tax Year | United Kingdom
Income Tax Examination [Line Items]
Open tax year	2017
Earliest Tax Year | Other Non-U.S. Countries
Income Tax Examination [Line Items]
Open tax year	2014
Earliest Tax Year | United States | Federal | General
Income Tax Examination [Line Items]
Open tax year	2016
Earliest Tax Year | United States | Federal | Limited Scope
Income Tax Examination [Line Items]
Open tax year	2012
Earliest Tax Year | United States | State and Local Jurisdiction
Income Tax Examination [Line Items]
Open tax year	2006
Latest Tax Year | Australia
Income Tax Examination [Line Items]
Open tax year	2020
Latest Tax Year | Belgium
Income Tax Examination [Line Items]
Open tax year	2020
Latest Tax Year | Brazil
Income Tax Examination [Line Items]
Open tax year	2020
Latest Tax Year | Canada
Income Tax Examination [Line Items]
Open tax year	2020
Latest Tax Year | China
Income Tax Examination [Line Items]
Open tax year	2020
Latest Tax Year | Mexico
Income Tax Examination [Line Items]
Open tax year	2020
Latest Tax Year | Romania
Income Tax Examination [Line Items]
Open tax year	2020
Latest Tax Year | Netherlands
Income Tax Examination [Line Items]
Open tax year	2020
Latest Tax Year | United Kingdom
Income Tax Examination [Line Items]
Open tax year	2020
Latest Tax Year | Other Non-U.S. Countries
Income Tax Examination [Line Items]
Open tax year	2020
Latest Tax Year | United States | Federal | General
Income Tax Examination [Line Items]
Open tax year	2020
Latest Tax Year | United States | Federal | Limited Scope
Income Tax Examination [Line Items]
Open tax year	2016
Latest Tax Year | United States | State and Local Jurisdiction
Income Tax Examination [Line Items]
Open tax year	2020

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - shares	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Weighted-Average Common Shares Outstanding
Basic weighted-average common shares outstanding	68,149,324	69,819,980	74,001,582
Dilutive stock options and other equity-based compensation awards	638,405	738,255	980,417
Diluted weighted-average common shares outstanding	68,787,729	70,558,235	74,981,999

Earnings Per Share - Schedule_2

Earnings Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Stock options	581,634	506,207	253,238

Receivables - Schedule of Recei

Receivables - Schedule of Receivables (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Receivables [Abstract]
Trade receivables - U.S. government	$ 105.8	$ 61.8
Trade receivables - other	734	997.7
Finance receivables	18.8	13.1
Notes receivable		0.4
Other receivables	17.1	32
Receivables, gross	875.7	1,105
Less allowance for doubtful accounts	(9.6)	(11.3)	$ (9.9)
Receivables, net	$ 866.1	$ 1,093.7

Receivables - Schedule of Class

Receivables - Schedule of Classification of Receivables in the Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Classification of receivables
Current receivables	$ 857.6	$ 1,082.3
Long-term receivables	8.5	11.4
Receivables, net	$ 866.1	$ 1,093.7

Receivables - Schedule of Finan

Receivables - Schedule of Finance and Notes Receivable Aging and Accrual Status (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Finance Receivable
Accounts Notes And Loans Receivable [Line Items]
Receivables on nonaccrual status	$ 0.2	$ 2.3
Receivables past due 90 days or more and still accruing	0	0
Receivables subject to general reserves	16.3	10.8
Allowance for doubtful accounts	(0.4)	(0.2)
Receivables subject to specific reserves	2.5	2.3
Allowance for doubtful accounts	(2.3)	(2)
Notes Receivable
Accounts Notes And Loans Receivable [Line Items]
Receivables on nonaccrual status	0	0
Receivables past due 90 days or more and still accruing	0	0
Receivables subject to general reserves	0	0
Allowance for doubtful accounts	0	0
Receivables subject to specific reserves	0	0.4
Allowance for doubtful accounts	$ 0	$ (0.4)

Receivables - Schedule of Allow

Receivables - Schedule of Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Accounts Notes And Loans Receivable [Line Items]
Allowance for doubtful accounts at beginning of year	$ 11.3	$ 9.9
Provision for doubtful accounts, net of recoveries	(0.6)	1.8
Charge-off of accounts	(1.1)	(0.4)
Allowance for doubtful accounts at end of year	9.6	11.3
Finance Receivable
Accounts Notes And Loans Receivable [Line Items]
Allowance for doubtful accounts at beginning of year	2.2	2.8
Provision for doubtful accounts, net of recoveries	0.5	(0.6)
Allowance for doubtful accounts at end of year	2.7	2.2
Notes Receivable
Accounts Notes And Loans Receivable [Line Items]
Allowance for doubtful accounts at beginning of year	0.4
Provision for doubtful accounts, net of recoveries		0.4
Charge-off of accounts	(0.4)
Allowance for doubtful accounts at end of year		0.4
Trade and Other Receivable
Accounts Notes And Loans Receivable [Line Items]
Allowance for doubtful accounts at beginning of year	8.7	7.1
Provision for doubtful accounts, net of recoveries	(1.1)	2
Charge-off of accounts	(0.7)	(0.4)
Allowance for doubtful accounts at end of year	$ 6.9	$ 8.7

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 745.7	$ 676
Partially finished products	295.2	244.2
Finished products	565	433
Inventories at FIFO cost	1,605.9	1,353.2
Less: Excess of FIFO cost over LIFO cost	(100.5)	(104)
Inventory net	$ 1,505.4	$ 1,249.2

Property, Plant and Equipment -

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 1,397	$ 1,360.9
Less accumulated depreciation	(831.1)	(787.3)
Property, plant and equipment, net	565.9	573.6
Land and Land Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	63.9	55.8
Buildings
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	377.1	325.8
Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	723.7	701
Software and Related Costs
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	175.6	181.2
Equipment on Operating Lease to Others
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	21.7	39.5
Construction in Progress
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 35	$ 57.6

Property, Plant and Equipment_2

Property, Plant and Equipment - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Property Plant And Equipment [Line Items]
Depreciation expenses	$ 89.1	$ 76.7	$ 79.8
Accelerated depreciation related to restructuring	6.9
Equipment on Operating Lease to Others
Property Plant And Equipment [Line Items]
Equipment on operating lease, net	$ 18.9	$ 31.3
Equipment on Operating Lease to Others | Minimum
Property Plant And Equipment [Line Items]
Estimated useful life (in years)	5 years
Equipment on Operating Lease to Others | Maximum
Property Plant And Equipment [Line Items]
Estimated useful life (in years)	10 years

Goodwill and Purchased Intang_3

Goodwill and Purchased Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jul. 01, 2020	Jul. 01, 2019
Acquired Finite Lived Intangible Assets [Line Items]
Minimum weighted-average cost of capital (as a percent)			8.00%	9.50%
Maximum weighted-average cost of capital (as a percent)			13.50%	13.00%
Terminal growth rate (as a percent)			3.00%	3.00%
Weighted- Average Life (in years)	14 years 8 months 12 days	14 years 8 months 12 days
Net	$ 33.5	$ 44.6
2021	5.3
2022	4.8
2023	3.4
2024	1.6
2025	$ 1.5
Distribution network
Acquired Finite Lived Intangible Assets [Line Items]
Weighted- Average Life (in years)	39 years 1 month 6 days	39 years 1 month 6 days
Net	$ 21.6	$ 23.1
JLG Industries Inc And Its Wholly Owned Subsidiaries Member
Acquired Finite Lived Intangible Assets [Line Items]
Percentage of recorded goodwill and purchased intangibles concentrated within the JLG reporting unit in the access equipment segment (as a percent)			90.00%
Pierce | Distribution network
Acquired Finite Lived Intangible Assets [Line Items]
Weighted- Average Life (in years)	40 years
Net	$ 21.2

Goodwill and Purchased Intang_4

Goodwill and Purchased Intangible Assets - Schedule of Changes in Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Changes in goodwill
Net goodwill at the beginning of the period	$ 995.7	$ 1,007.9
Foreign currency translation	13.8	(12.2)
Net goodwill at the end of the period	1,009.5	995.7
Access Equipment
Changes in goodwill
Net goodwill at the beginning of the period	868.8	880.9
Foreign currency translation	13.8	(12.1)
Net goodwill at the end of the period	882.6	868.8
Fire & Emergency
Changes in goodwill
Net goodwill at the beginning of the period	106.1	106.1
Net goodwill at the end of the period	106.1	106.1
Commercial
Changes in goodwill
Net goodwill at the beginning of the period	20.8	20.9
Foreign currency translation		(0.1)
Net goodwill at the end of the period	$ 20.8	$ 20.8

Goodwill and Purchased Intang_5

Goodwill and Purchased Intangible Assets - Goodwill Allocated to Reportable Segments (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Goodwill [Line Items]
Gross	$ 2,119.5	$ 2,105.7
Accumulated Impairment	(1,110)	(1,110)
Net	1,009.5	995.7	$ 1,007.9
Access Equipment
Goodwill [Line Items]
Gross	1,814.7	1,800.9
Accumulated Impairment	(932.1)	(932.1)
Net	882.6	868.8	880.9
Fire & Emergency
Goodwill [Line Items]
Gross	108.1	108.1
Accumulated Impairment	(2)	(2)
Net	106.1	106.1	106.1
Commercial
Goodwill [Line Items]
Gross	196.7	196.7
Accumulated Impairment	(175.9)	(175.9)
Net	$ 20.8	$ 20.8	$ 20.9

Goodwill and Purchased Intang_6

Goodwill and Purchased Intangible Assets - Schedule of Purchased Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Acquired Finite Lived Intangible Assets [Line Items]
Weighted- Average Life (in years)	14 years 8 months 12 days	14 years 8 months 12 days
Gross	$ 731.2	$ 731.2
Accumulated Amortization	(697.7)	(686.6)
Net	33.5	44.6
Non-amortizable trade names	384.7	387.7
Intangible assets excluding goodwill, gross	1,115.9	1,118.9
Purchased intangible assets, net	$ 418.2	$ 432.3
Distribution network
Acquired Finite Lived Intangible Assets [Line Items]
Weighted- Average Life (in years)	39 years 1 month 6 days	39 years 1 month 6 days
Gross	$ 55.4	$ 55.4
Accumulated Amortization	(33.8)	(32.3)
Net	$ 21.6	$ 23.1
Technology-related
Acquired Finite Lived Intangible Assets [Line Items]
Weighted- Average Life (in years)	11 years 10 months 24 days	11 years 10 months 24 days
Gross	$ 104.7	$ 104.7
Accumulated Amortization	(103.3)	(102.6)
Net	$ 1.4	$ 2.1
Customer relationships
Acquired Finite Lived Intangible Assets [Line Items]
Weighted- Average Life (in years)	12 years 9 months 18 days	12 years 9 months 18 days
Gross	$ 554.7	$ 554.8
Accumulated Amortization	(545.6)	(536.8)
Net	$ 9.1	$ 18
Other
Acquired Finite Lived Intangible Assets [Line Items]
Weighted- Average Life (in years)	16 years 3 months 18 days	16 years 1 month 6 days
Gross	$ 16.4	$ 16.3
Accumulated Amortization	(15)	(14.9)
Net	$ 1.4	$ 1.4

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2021
Lessee Lease Description [Line Items]
Operating Lease, existence of option to extend	true
Operating leases, right of use assets	$ 149
Operating Lease Liability	152.6
Real Estate Leases
Lessee Lease Description [Line Items]
Operating leases, right of use assets	$ 121
Real Estate Leases | Access Equipment | Warehouse
Lessee Lease Description [Line Items]
Operating lease, term of leases not yet commenced	15 years
Real Estate Leases | Access Equipment | Warehouse | Scenario Forecast
Lessee Lease Description [Line Items]
Operating leases, right of use assets		$ 35
Operating Lease Liability		$ 35
Real Estate Leases | Maximum
Lessee Lease Description [Line Items]
Operating lease, term of leases	29 years
Equipment Leases
Lessee Lease Description [Line Items]
Operating leases, right of use assets	$ 28
Equipment Leases | Maximum
Lessee Lease Description [Line Items]
Operating lease, term of leases	16 years

Leases - Components of Lease Co

Leases - Components of Lease Costs (Details) $ in Millions	12 Months Ended
	Sep. 30, 2020USD ($)
Lease Cost [Abstract]
Operating lease cost	$ 57.4
Variable lease cost	46.1
Short-term lease cost	$ 8.4

Leases - Summary of Supplementa

Leases - Summary of Supplemental Information Related to Leases (Details) $ in Millions	Sep. 30, 2020USD ($)
Assets And Liabilities Lessee [Abstract]
Finance leases, right of use assets	$ 13.2
Financing Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent
Finance leases, current lease liabilities	$ 3.6
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent
Finance leases, long-term lease liabilities	$ 9.7
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]]	us-gaap:OtherLiabilitiesNoncurrent
Finance leases, weighted average remaining lease term	4 years
Finance leases, weighted average discount rates	2.40%
Operating leases, right of use assets	$ 149
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent
Operating leases, current lease liabilities	$ 43.5
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent
Operating leases, long-term lease liabilities	$ 109.1
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Operating leases, weighted average remaining lease term	5 years 6 months
Operating leases, weighted average discount rates	2.90%
Lease right of use assets, total	$ 162.2
Current lease liabilities, total	47.1
Long-term lease liabilities, total	$ 118.8

Leases - Right of Use Asset Bal

Leases - Right of Use Asset Balance for Operating Leases Disaggregated by Segment and Type of Lease (Details) $ in Millions	Sep. 30, 2020USD ($)
Lessee Lease Description [Line Items]
Right of use asset balance	$ 149
Operating Segments | Access Equipment
Lessee Lease Description [Line Items]
Right of use asset balance	68.7
Operating Segments | Defense
Lessee Lease Description [Line Items]
Right of use asset balance	32.4
Operating Segments | Fire & Emergency
Lessee Lease Description [Line Items]
Right of use asset balance	8.7
Operating Segments | Commercial
Lessee Lease Description [Line Items]
Right of use asset balance	19.8
Corporate and Intersegment Eliminations
Lessee Lease Description [Line Items]
Right of use asset balance	19.4
Real Estate Leases
Lessee Lease Description [Line Items]
Right of use asset balance	121
Real Estate Leases | Operating Segments | Access Equipment
Lessee Lease Description [Line Items]
Right of use asset balance	61.4
Real Estate Leases | Operating Segments | Defense
Lessee Lease Description [Line Items]
Right of use asset balance	28.2
Real Estate Leases | Operating Segments | Fire & Emergency
Lessee Lease Description [Line Items]
Right of use asset balance	6.5
Real Estate Leases | Operating Segments | Commercial
Lessee Lease Description [Line Items]
Right of use asset balance	17.9
Real Estate Leases | Corporate and Intersegment Eliminations
Lessee Lease Description [Line Items]
Right of use asset balance	7
Equipment Leases
Lessee Lease Description [Line Items]
Right of use asset balance	28
Equipment Leases | Operating Segments | Access Equipment
Lessee Lease Description [Line Items]
Right of use asset balance	7.3
Equipment Leases | Operating Segments | Defense
Lessee Lease Description [Line Items]
Right of use asset balance	4.2
Equipment Leases | Operating Segments | Fire & Emergency
Lessee Lease Description [Line Items]
Right of use asset balance	2.2
Equipment Leases | Operating Segments | Commercial
Lessee Lease Description [Line Items]
Right of use asset balance	1.9
Equipment Leases | Corporate and Intersegment Eliminations
Lessee Lease Description [Line Items]
Right of use asset balance	$ 12.4

Leases - Maturities of Operatin

Leases - Maturities of Operating Lease Liabilities and Minimum Payments for Operating Leases (Details) $ in Millions	Sep. 30, 2020USD ($)
Operating Lease Liabilities Payments Due [Abstract]
2021	$ 47.7
2022	34.9
2023	23.7
2024	16
2025	11.5
Thereafter	31.3
Total lease payments	165.1
Less: imputed interest	(12.5)
Present value of lease liability	$ 152.6
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent

Leases - Schedule of Operating

Leases - Schedule of Operating Leases Future Minimum Payments (Details) $ in Millions	Sep. 30, 2019USD ($)
Operating Leases Future Minimum Payments Due [Abstract]
2020	$ 34
2021	26.7
2022	15.9
2023	11.3
2024	7.1
Thereafter	$ 11.7

Other Long-Term Assets (Details

Other Long-Term Assets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Other Assets Noncurrent Disclosure [Abstract]
Lease right of use asset (See Note 12 of Notes to Consolidated Financial Statements)	$ 162.2
Deferred income taxes, net (See Note 6 of Notes to Consolidated Financial Statements)	78.6	$ 107.9
Rabbi trust, less current portion	17.9	20
Investments in unconsolidated affiliates	12.6	11
Customer finance receivables	5.6	7.2
Other	10.1	10.7
Other long-term assets, gross	287	156.8
Less allowance for doubtful receivables	(0.5)	(0.4)
Other long-term assets, net	$ 286.5	$ 156.4

Credit Agreements - Schedule of

Credit Agreements - Schedule of Debt Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019	Apr. 03, 2018
Debt Instrument [Line Items]
Principal	$ 825	$ 825
Debt Issuance Costs, Net	(7.1)	(6)
Debt, Net	817.9	819
Other short-term debt	5.2
Senior Term Loan
Debt Instrument [Line Items]
Principal	225	275
Debt Issuance Costs, Net	(0.3)	(0.6)
Debt, Net	224.7	274.4	$ 325
4.600% Senior Notes Due May 2028
Debt Instrument [Line Items]
Principal	300	300
Debt Issuance Costs, Net	(3)	(3.4)
Debt, Net	297	296.6
3.100% Senior Notes due March 2030
Debt Instrument [Line Items]
Principal	300
Debt Issuance Costs, Net	(3.8)
Debt, Net	$ 296.2
5.375% Senior Notes due March 2025
Debt Instrument [Line Items]
Principal		250
Debt Issuance Costs, Net		(2)
Debt, Net		$ 248

Credit Agreements - Schedule _2

Credit Agreements - Schedule of Debt Instruments (Parenthetical) (Details)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Feb. 26, 2020	May 31, 2018	Mar. 31, 2015
4.600% Senior Notes Due May 2028
Debt Instrument [Line Items]
Debt instrument interest rate, stated percentage	4.60%	4.60%		4.60%
Maturity month and year	2028-05	2028-05
3.100% Senior Notes due March 2030
Debt Instrument [Line Items]
Debt instrument interest rate, stated percentage	3.10%		3.10%
Maturity month and year	2030-03
5.375% Senior Notes due March 2025
Debt Instrument [Line Items]
Debt instrument interest rate, stated percentage		5.375%			5.375%
Maturity month and year		2025-03

Credit Agreements - Additional

Credit Agreements - Additional Information (Details)	Feb. 26, 2020USD ($)	Apr. 03, 2018USD ($)	May 31, 2018USD ($)	Mar. 31, 2015USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2020CNY (¥)	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019CNY (¥)
Debt Instrument [Line Items]
Debt, net					$ 817,900,000		$ 819,000,000
Letters of credit outstanding					59,900,000
Long term debt
Debt issuance costs capitalized					1,800,000			$ 3,200,000
Uncommitted Line of Credit
Debt Instrument [Line Items]
Available borrowing capacity | ¥									¥ 220,000,000
Short term debt
Line of credit outstanding					$ 5,200,000	¥ 35,000,000
Line of credit variable interest rate					3.50%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 850,000,000
Maturity month and year		2023-04
Available borrowing capacity					$ 790,100,000
Letter of Credit
Debt Instrument [Line Items]
Letter of credit fees percentage on available borrowing capacity, low end of range (as a percent)					0.563%	0.563%
Letter of credit fees percentage on available borrowing capacity, high end of range (as a percent)					1.75%	1.75%
Senior Term Loan
Debt Instrument [Line Items]
Maturity month and year		2023-04
Debt, net		$ 325,000,000			$ 224,700,000		$ 274,400,000
Quarterly principal installment, at commencement		4,100,000
Payment due at maturity		$ 264,100,000
Amount of balloon payment paid					$ 39,100,000
Weighted-average interest rate (as a percent)					1.40%
Long term debt
Repayments of Debt			$ 49,200,000
Senior Credit Agreement
Debt Instrument [Line Items]
Interest spread in basis points (as a percent)					1.25%	1.25%
Maximum leverage ratio					3.75
Minimum interest coverage ratio					2.50
Senior Credit Agreement | Minimum
Debt Instrument [Line Items]
Revolving credit facility, unused commitment fee rate (as a percent)					0.125%	0.125%
Senior Credit Agreement | Maximum
Debt Instrument [Line Items]
Revolving credit facility, unused commitment fee rate (as a percent)					0.275%	0.275%
Senior Credit Agreement | Federal Funds Rate
Debt Instrument [Line Items]
Interest spread in basis points (as a percent)					0.50%	0.50%
Senior Credit Agreement | LIBOR
Debt Instrument [Line Items]
Interest spread in basis points (as a percent)					1.00%	1.00%
5.375% Senior Notes due March 2025
Debt Instrument [Line Items]
Maturity month and year							2025-03
Debt, net							$ 248,000,000
Long term debt
Debt issued				$ 250,000,000
Debt instrument interest rate, stated percentage				5.375%			5.375%		5.375%
Maturity date				Mar. 1, 2025
4.600% Senior Notes Due May 2028
Debt Instrument [Line Items]
Maturity month and year					2028-05	2028-05	2028-05
Debt, net					$ 297,000,000		$ 296,600,000
Long term debt
Debt issued			$ 300,000,000
Debt instrument interest rate, stated percentage			4.60%		4.60%		4.60%		4.60%
Maturity date			May 15, 2028
Debt instruments
Debt instrument, fair value					$ 342,000,000		$ 322,000,000
3.100% Senior Notes due March 2030
Debt Instrument [Line Items]
Maturity month and year					2030-03	2030-03
Debt, net					$ 296,200,000
Long term debt
Debt issued	$ 300,000,000
Debt instrument interest rate, stated percentage	3.10%				3.10%
Maturity date	Mar. 1, 2030
Debt instrument, redemption discount	$ 1,200,000
Debt issuance costs capitalized	$ 2,900,000
Debt instruments
Debt instrument, fair value					$ 316,000,000
3.100% Senior Notes due March 2030 | Interest Expense
Long term debt
Debt extinguishment expense					$ 8,500,000

Warranties - Additional Informa

Warranties - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Product Warranty Liability [Line Items]
Warranty costs	$ 57.9	$ 54.9	$ 57
Changes in liability for pre-existing warranties, net	14.8	$ (0.8)
Defense Segment
Product Warranty Liability [Line Items]
Changes in liability for pre-existing warranties, net	$ 12.3
Minimum
Product Warranty Liability [Line Items]
Product warranty term	6 months
Maximum
Product Warranty Liability [Line Items]
Product warranty term	5 years

Warranties - Schedule of Change

Warranties - Schedule of Changes in Assurance-type Warranty Liability (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Product Warranties Disclosures [Abstract]
Balance at beginning of year	$ 65.1	$ 75.3
Adoption of ASC 606		(14.4)
Warranty provisions	43.1	55.5
Settlements made	(55.9)	(50.2)
Changes in liability for pre-existing warranties, net	14.8	(0.8)
Foreign currency translation	0.3	(0.3)
Balance at end of year	$ 67.4	$ 65.1

Guarantee Arrangements - Additi

Guarantee Arrangements - Additional Information (Details) $ in Millions	Sep. 30, 2020USD ($)
Indirect Guarantee of Deferred Payment and Lease Payment Agreements
Guarantee Obligations [Line Items]
Aggregate indebtedness to customers under credit guarantees	$ 749.8
Estimated maximum loss exposure under contracts	150.2
Residual Value Guarantee
Guarantee Obligations [Line Items]
Estimated maximum loss exposure under contracts	11.9
Customer equipment value including a residual value guarantee	$ 92.7

Guarantee Arrangements - Schedu

Guarantee Arrangements - Schedule of Provision for Losses on Customer Guarantees (Details1) - Indirect Guarantee of Deferred Payment and Lease Payment Agreements - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Guarantee Obligations [Line Items]
Balance at beginning of year	$ 15.8	$ 10.4
Provision for new credit guarantees	4.9	9.9
Changes for pre-existing guarantees, net	(0.5)	(0.5)
Amortization of previous guarantees	(5)	(3.8)
Foreign currency translation	0.3	(0.2)
Balance at end of year	$ 15.5	$ 15.8

Restructuring and Other Charg_3

Restructuring and Other Charges - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 13	$ 10.2	$ 14.4
Access Equipment
Restructuring Cost and Reserve [Line Items]
Restructuring charges			10.4	$ 4.7
Commercial
Restructuring Cost and Reserve [Line Items]
Restructuring charges			1.5	$ 5.4
Access Equipment Restructuring Plan 1 | Access Equipment
Restructuring Cost and Reserve [Line Items]
Restructuring charges			10.4
Access Equipment Restructuring Plan 1 | Access Equipment | Restructuring Actions
Restructuring Cost and Reserve [Line Items]
Restructuring charges			4.7
Access Equipment Restructuring Plan 1 | Access Equipment | Accelerated Depreciation
Restructuring Cost and Reserve [Line Items]
Restructuring charges			2.8
Access Equipment Restructuring Plan 1 | Access Equipment | Inventory Obsolescence
Restructuring Cost and Reserve [Line Items]
Restructuring charges			1.6
Access Equipment Restructuring Plan 1 | Access Equipment | Other Operational Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			0.3
Commercial Restructuring Plan | Commercial
Restructuring Cost and Reserve [Line Items]
Restructuring charges			1.5
Commercial Restructuring Plan | Commercial | Accelerated Depreciation
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 4.1

Restructuring and Other Charg_4

Restructuring and Other Charges - Restructuring and Related Costs (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2018
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 13	$ 10.2	$ 14.4
Access Equipment
Restructuring Reserve [Roll Forward]
Restructuring charges			10.4	$ 4.7
Commercial
Restructuring Reserve [Roll Forward]
Restructuring charges			1.5	$ 5.4
Fire & Emergency
Restructuring Reserve [Roll Forward]
Restructuring charges			1.4
Corporate
Restructuring Reserve [Roll Forward]
Restructuring charges			1.1
Cost of Sales
Restructuring Reserve [Roll Forward]
Restructuring charges			3.9
Cost of Sales | Access Equipment
Restructuring Reserve [Roll Forward]
Restructuring charges			2.9
Cost of Sales | Commercial
Restructuring Reserve [Roll Forward]
Restructuring charges			0.7
Cost of Sales | Fire & Emergency
Restructuring Reserve [Roll Forward]
Restructuring charges			0.3
Selling, General and Administrative Expenses
Restructuring Reserve [Roll Forward]
Restructuring charges			10.5
Selling, General and Administrative Expenses | Access Equipment
Restructuring Reserve [Roll Forward]
Restructuring charges			7.5
Selling, General and Administrative Expenses | Commercial
Restructuring Reserve [Roll Forward]
Restructuring charges			0.8
Selling, General and Administrative Expenses | Fire & Emergency
Restructuring Reserve [Roll Forward]
Restructuring charges			1.1
Selling, General and Administrative Expenses | Corporate
Restructuring Reserve [Roll Forward]
Restructuring charges			$ 1.1

Restructuring and Other Charg_5

Restructuring and Other Charges - Schedule of Change in Restructuring Reserves (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2020
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 13	$ 10.2	$ 14.4
Utilized - cash			(3.5)
Utilized - noncash			(0.8)
Foreign currency translation			(0.1)
Ending balance	10		10
Employee Severance and Termination Benefits
Restructuring Reserve [Roll Forward]
Restructuring charges			13.3
Utilized - cash			(3.5)
Foreign currency translation			(0.1)
Ending balance	9.7		9.7
Property, Plant and Equipment Impairment
Restructuring Reserve [Roll Forward]
Restructuring charges			0.8
Utilized - noncash			(0.8)
Other Costs
Restructuring Reserve [Roll Forward]
Restructuring charges			0.3
Ending balance	$ 0.3		$ 0.3

Contingencies, Significant Es_3

Contingencies, Significant Estimates and Concentrations - Additional Information (Details) $ in Millions		3 Months Ended	12 Months Ended
		Sep. 30, 2020USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2017CAD ($)
Loss Contingencies [Line Items]
Approximate percentage of workforce covered under collective bargaining agreements (as a percent)		23.00%	23.00%
Miscellaneous, net	[1]		$ 2,200,000	$ 1,300,000	$ (5,800,000)
Defense
Loss Contingencies [Line Items]
Litigation compensation recommendation						$ 25.3
Former Gain Contingency, Recognized in Current Period		$ 4,200,000	4,200,000		19,000,000
Commercial
Loss Contingencies [Line Items]
Former Gain Contingency, Recognized in Current Period		1,500,000	1,500,000
Gain on Business Interruption Insurance Recovery		18,500,000	18,500,000		$ 6,600,000
Reduction of cost of sales			10,800,000
Miscellaneous, net			6,200,000
Personal Injury Actions and Other
Loss Contingencies [Line Items]
Maximum self-insurance available per claim			5,000,000
Reserve for loss contingencies		33,800,000	33,800,000	36,200,000
Performance and Specialty Bonds
Loss Contingencies [Line Items]
Commitments and contingencies		721,100,000	721,100,000	552,200,000
Standby Letters of Credit
Loss Contingencies [Line Items]
Commitments and contingencies		$ 64,400,000	$ 64,400,000	$ 63,700,000
[1]	Fiscal 2020 results include a $6.2 million gain from insurance proceeds in excess of property loss in the Commercial segment.

Contingencies, Significant Es_4

Contingencies, Significant Estimates and Concentrations - Schedule of Significant Portion of Revenues from the Department of Defense (Details) - USD ($) $ in Millions

3 Months Ended

12 Months Ended

Sep. 30, 2020

[1]

Jun. 30, 2020

[2]

Mar. 31, 2020

[3]

Dec. 31, 2019

Sep. 30, 2019

Jun. 30, 2019

Mar. 31, 2019

Dec. 31, 2018

[4]

Sep. 30, 2020

Sep. 30, 2019

Sep. 30, 2018

Disaggregation Of Revenue [Line Items]

Net sales

$ 1,784.2

$ 1,580.8

$ 1,796.7

$ 1,695.1

$ 2,195.7

$ 2,392.7

$ 1,990.2

$ 1,803.4

$ 6,856.8

$ 8,382

$ 7,705.5

DoD

Disaggregation Of Revenue [Line Items]

Net sales

2,300.4

2,006.9

1,648.4

Foreign Military

Disaggregation Of Revenue [Line Items]

Net sales

71.2

27.7

28

Total DoD Sales

Disaggregation Of Revenue [Line Items]

Net sales

$ 2,371.6

$ 2,034.6

$ 1,676.4

[1]

[2]

[3]

[4]

The first quarter of fiscal 2019 was impacted by tax expense related to tax reform in the U.S. of $7.0 million.

Shareholders' Equity - Addition

Shareholders' Equity - Additional information (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	May 31, 2019
Stockholders Equity Note [Abstract]
Number of shares of common stock authorized for buyback (in shares)				10,000,000
Remaining number of shares authorized to be repurchased (in shares)	7,459,328
Treasury stock, shares, acquired (in shares)	550,853	4,866,532	3,273,040
Treasury stock, value, acquired, cost method	$ 40.8	$ 350.1	$ 249.3

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of year	$ 2,599.8
Total other comprehensive income (loss), net of tax	3.2	$ (85.7)	$ 18.2
Balance at end of year	2,850.7	2,599.8
Employee Pension and Postretirement Benefits, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of year	(69.4)	(10.9)	(46.2)
Other comprehensive income (loss) before reclassifications	(29.3)	(49.5)	33.1
Amounts reclassified from accumulated other comprehensive income (loss)	2.8	0.1	2.2
Total other comprehensive income (loss), net of tax	(26.5)	(49.4)	35.3
Balance at end of year	(95.9)	(69.4)	(10.9)
Employee Pension and Postretirement Benefits, Net of Tax | Revision of Prior Period, Accounting Standards Update, Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of year		(20)
Balance at end of year			(20)
Employee Pension and Postretirement Benefits, Net of Tax | Accounting Standards Update 2018-02
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of year		(9.1)
Balance at end of year			(9.1)
Cumulative Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of year	(132.5)	(96.2)	(78.6)
Other comprehensive income (loss) before reclassifications	30.4	(36.3)	(17.6)
Total other comprehensive income (loss), net of tax	30.4	(36.3)	(17.6)
Balance at end of year	(102.1)	(132.5)	(96.2)
Cumulative Translation Adjustments | Revision of Prior Period, Accounting Standards Update, Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of year		(96.2)
Balance at end of year			(96.2)
Derivative Instruments, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of year	0.3	0.3	(0.2)
Other comprehensive income (loss) before reclassifications	(0.5)		0.6
Amounts reclassified from accumulated other comprehensive income (loss)	(0.2)		(0.1)
Total other comprehensive income (loss), net of tax	(0.7)		0.5
Balance at end of year	(0.4)	0.3	0.3
Derivative Instruments, Net of Tax | Revision of Prior Period, Accounting Standards Update, Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of year		0.3
Balance at end of year			0.3
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of year	(201.6)	(106.8)	(125)
Other comprehensive income (loss) before reclassifications	0.6	(85.8)	16.1
Amounts reclassified from accumulated other comprehensive income (loss)	2.6	0.1	2.1
Total other comprehensive income (loss), net of tax	3.2	(85.7)	18.2
Balance at end of year	$ (198.4)	(201.6)	(106.8)
Accumulated Other Comprehensive Income (Loss) | Revision of Prior Period, Accounting Standards Update, Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of year		(115.9)
Balance at end of year			(115.9)
Accumulated Other Comprehensive Income (Loss) | Accounting Standards Update 2018-02
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of year		$ (9.1)
Balance at end of year			$ (9.1)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Included in Computation of Net Periodic Pension and Postretirement Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Prior Service Costs
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	$ 0.7	$ 0.2	$ 0.9
Actuarial (Gains) Losses
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	3.1		2
Employee Pension and Postretirement Benefits, Net of Tax
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	3.8	0.2	2.9
Tax benefit	(1)	(0.1)	(0.7)
Net of tax	$ 2.8	$ 0.1	$ 2.2

Derivative Financial Instrume_3

Derivative Financial Instruments and Hedging Activities - Additional Information (Details) - Foreign Exchange Contract	Sep. 30, 2020USD ($)
Not Designated as Hedging Instruments
Open derivative instruments
Derivative, Notional Amount	$ 90,700,000
Cash Flow Hedging | Designated as Hedging Instrument
Open derivative instruments
Derivative, Notional Amount	$ 9,100,000

Derivative Financial Instrume_4

Derivative Financial Instruments and Hedging Activities - Schedule of Fair Values of All Open Derivative Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Other Current Assets
Fair values of open derivative instruments
Fair value of derivative assets		$ 0.8
Other Current Liabilities
Fair values of open derivative instruments
Fair value of derivative liabilities	$ 2.5	0.4
Not Designated as Hedging Instruments | Foreign Exchange Contract | Other Current Assets
Fair values of open derivative instruments
Fair value of derivative assets		0.4
Not Designated as Hedging Instruments | Foreign Exchange Contract | Other Current Liabilities
Fair values of open derivative instruments
Fair value of derivative liabilities	2	0.4
Cash Flow Hedging | Designated as Hedging Instrument | Foreign Exchange Contract | Other Current Assets
Fair values of open derivative instruments
Fair value of derivative assets		$ 0.4
Cash Flow Hedging | Designated as Hedging Instrument | Foreign Exchange Contract | Other Current Liabilities
Fair values of open derivative instruments
Fair value of derivative liabilities	$ 0.5

Derivative Financial Instrume_5

Derivative Financial Instruments and Hedging Activities - Schedule of Pre-tax Effects of Derivative Instruments (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Pre-tax gains (losses) on derivative instruments
Total pre-tax effects of derivative instruments	$ 2.3	$ (0.4)	$ (3.6)
Designated as Hedging Instrument | Cash Flow Hedging | Foreign Exchange Contract | Cost of Sales
Pre-tax gains (losses) on derivative instruments
Reclassified from other comprehensive income (effective portion)	0.6	1.3	(0.5)
Not Designated as Hedging Instruments | Foreign Exchange Contract | Miscellaneous, Net
Pre-tax gains (losses) on derivative instruments
Not designated as hedges	$ 1.7	$ (1.7)	(2.4)
Not Designated as Hedging Instruments | Interest Rate Contract | Miscellaneous, Net
Pre-tax gains (losses) on derivative instruments
Not designated as hedges			$ (0.7)

Fair Value Measurement - Schedu

Fair Value Measurement - Schedule of Fair Values of Financial Assets and Liabilities (Details) - USD ($) $ in Millions		Sep. 30, 2020	Sep. 30, 2019
Assets:
Foreign currency exchange derivatives	[1]		$ 0.8
Liabilities:
Foreign currency exchange derivatives	[1]	$ 2.5	0.4
SERP Plan [Member]
Assets:
SERP plan assets	[2]	21.4	21.4
Level 1 | SERP Plan [Member]
Assets:
SERP plan assets	[2]	21.4	21.4
Level 2
Assets:
Foreign currency exchange derivatives	[1]		0.8
Liabilities:
Foreign currency exchange derivatives	[1]	$ 2.5	$ 0.4
[1]	Based on observable market transactions of forward currency prices.
[2]	Represents investments in a rabbi trust for the Company’s non-qualified SERP. The fair values of these investments are determined using a market approach. Investments include mutual funds for which quoted prices in active markets are available. The Company records changes in the fair value of investments in “Miscellaneous, net” in the Consolidated Statements of Income.

Business Segment Information -

Business Segment Information - Additional Information (Details) - Segment	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Number of reportable segments of entity (in segments)	4
Sales Revenue, Net | Customer Concentration Risk | Defense | DoD
Segment Reporting Information [Line Items]
Percentage of sales accounted for by Department of Defense (as a percent)	98.00%	97.00%	90.00%

Business Segment Information _2

Business Segment Information - Schedule of Net Sales by Product Lines and Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended												12 Months Ended
	Sep. 30, 2020	[1]	Jun. 30, 2020	[2]	Mar. 31, 2020	[3]	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	[4]	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Revenues	$ 1,784.2		$ 1,580.8		$ 1,796.7		$ 1,695.1	$ 2,195.7	$ 2,392.7	$ 1,990.2	$ 1,803.4		$ 6,856.8	$ 8,382	$ 7,705.5
Access Equipment
Segment Reporting Information [Line Items]
Revenues													2,505.7	4,079.7	3,776.8
Access Equipment | Aerial Work Platforms
Segment Reporting Information [Line Items]
Revenues													1,101.7	1,944.4	2,017.2
Access Equipment | Telehandlers
Segment Reporting Information [Line Items]
Revenues													680.4	1,254.9	948.9
Access Equipment | Other
Segment Reporting Information [Line Items]
Revenues													723.6	880.4	810.7
Defense
Segment Reporting Information [Line Items]
Revenues													2,260.3	2,030.3	1,827.3
Fire & Emergency
Segment Reporting Information [Line Items]
Revenues													1,138.1	1,249.8	1,053.6
Commercial
Segment Reporting Information [Line Items]
Revenues													951.3	1,020.1	1,046.8
Commercial | Concrete Placement
Segment Reporting Information [Line Items]
Revenues													403.5	439.9	491.8
Commercial | Refuse Collection
Segment Reporting Information [Line Items]
Revenues													437.2	451.9	438.3
Commercial | Other
Segment Reporting Information [Line Items]
Revenues													110.6	128.3	116.7
Corporate and Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues													1.4	2.1	1
Operating Segments | Access Equipment
Segment Reporting Information [Line Items]
Revenues													2,515.1	4,079.7	3,776.8
Operating Segments | Access Equipment | Aerial Work Platforms
Segment Reporting Information [Line Items]
Revenues													1,101.7	1,944.4	2,017.2
Operating Segments | Access Equipment | Telehandlers
Segment Reporting Information [Line Items]
Revenues													680.4	1,254.9	948.9
Operating Segments | Access Equipment | Other
Segment Reporting Information [Line Items]
Revenues													733	880.4	810.7
Operating Segments | Defense
Segment Reporting Information [Line Items]
Revenues													2,262.2	2,032.1	1,828.9
Operating Segments | Fire & Emergency
Segment Reporting Information [Line Items]
Revenues													1,147.1	1,266.1	1,069.7
Operating Segments | Commercial
Segment Reporting Information [Line Items]
Revenues													957.8	1,022.2	1,054.7
Operating Segments | Commercial | Concrete Placement
Segment Reporting Information [Line Items]
Revenues													403.5	439.9	491.8
Operating Segments | Commercial | Refuse Collection
Segment Reporting Information [Line Items]
Revenues													437.2	451.9	438.3
Operating Segments | Commercial | Other
Segment Reporting Information [Line Items]
Revenues													117.1	130.4	124.6
Corporate, Non-segment | Corporate and Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues													(25.4)	(18.1)	(24.6)
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues													(25.4)	(18.1)	(24.6)
Intersegment Eliminations | Access Equipment
Segment Reporting Information [Line Items]
Revenues													9.4
Intersegment Eliminations | Access Equipment | Other
Segment Reporting Information [Line Items]
Revenues													9.4
Intersegment Eliminations | Defense
Segment Reporting Information [Line Items]
Revenues													1.9	1.8	1.6
Intersegment Eliminations | Fire & Emergency
Segment Reporting Information [Line Items]
Revenues													9	16.3	16.1
Intersegment Eliminations | Commercial
Segment Reporting Information [Line Items]
Revenues													6.5	2.1	7.9
Intersegment Eliminations | Commercial | Other
Segment Reporting Information [Line Items]
Revenues													6.5	2.1	7.9
Intersegment Eliminations | Corporate and Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues													$ (26.8)	$ (20.2)	$ (25.6)
[1]
[2]
[3]
[4]	The first quarter of fiscal 2019 was impacted by tax expense related to tax reform in the U.S. of $7.0 million.

Business Segment Information _3

Business Segment Information - Schedule of Income (Loss) from Continuing Operations by Product Lines and Reportable Segments (Details) - USD ($) $ in Millions

3 Months Ended

12 Months Ended

Sep. 30, 2020

[1]

Jun. 30, 2020

[2]

Mar. 31, 2020

[3]

Dec. 31, 2019

Sep. 30, 2019

Jun. 30, 2019

Mar. 31, 2019

Dec. 31, 2018

[4]

Sep. 30, 2020

Sep. 30, 2019

Sep. 30, 2018

Operating income (loss):

Operating income (loss)

$ 127.4

$ 118.6

$ 133.6

$ 109.1

$ 203.1

$ 257.8

$ 175.6

$ 160.5

$ 488.7

$ 797

$ 656

Interest expense, net of interest income

[5]

(51.8)

(47.6)

(55.6)

Miscellaneous other (expense) income

[6]

2.2

1.3

(5.8)

Income before income taxes and earnings (losses) of unconsolidated affiliates

439.1

750.7

594.6

Commercial

Operating income (loss):

Miscellaneous other (expense) income

6.2

Operating Segments | Access Equipment

Operating income (loss):

Operating income (loss)

[7]

198.6

502.6

387.5

Operating Segments | Defense

Operating income (loss):

Operating income (loss)

[8]

183.5

203.3

225.4

Operating Segments | Fire & Emergency

Operating income (loss):

Operating income (loss)

[9]

151.1

176.5

137.6

Operating Segments | Commercial

Operating income (loss):

Operating income (loss)

[10]

81.2

66.8

67.5

Corporate, Non-segment

Operating income (loss):

Operating income (loss)

[11]

$ (125.7)

$ (152.2)

$ (162)

[1]

[2]

[3]

[4]

The first quarter of fiscal 2019 was impacted by tax expense related to tax reform in the U.S. of $7.0 million.

[5]

Fiscal 2020 results include $8.5 million in debt extinguishment costs and $3.3 million interest income from an arbitration settlement in the Defense segment. Fiscal 2018 results include $9.9 million in debt extinguishment costs.

[6]

Fiscal 2020 results include a $6.2 million gain from insurance proceeds in excess of property loss in the Commercial segment.

[7]

Fiscal 2020 results include $10.4 million of restructuring costs and $4.7 million operating expenses related to restructuring plans. Fiscal 2018 results include $4.7 million of restructuring costs and $24.8 million of operating expenses related to restructuring plans.

[8]

Fiscal 2020 results include reimbursement of $0.9 million of legal costs associated with an arbitration settlement. Fiscal 2018 results include a $19.0 million gain for a litigation settlement (See Note 18 of the Notes to Consolidated Financial Statements for additional details regarding the settlement).

[9]

Fiscal 2020 includes $1.4 million of restructuring costs.

[10]

Fiscal 2020 results include $1.5 million of restructuring costs, $4.1 million of accelerated depreciation related to restructuring actions, a gain of $12.3 million arising from a business interruption insurance recovery and a gain on the sale of a business of $3.1 million. Fiscal 2018 results include $5.4 million of restructuring costs, a business interruption insurance gain of $6.6 million and a loss on the sale of a small product line of $1.4 million

[11]

Fiscal 2020 includes $1.1 million of restructuring costs.

Business Segment Information _4

Business Segment Information - Schedule of Income (Loss) from Continuing Operations by Product Lines and Reportable Segments (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2018
Segment Reporting Information [Line Items]
Restructuring provision	$ 13	$ 10.2		$ 14.4
Accelerated depreciation related to restructuring				6.9
Gain (loss) on extinguishment of debt			$ (8.5)
Gain from insurance proceeds				6.2
Interest Expense
Segment Reporting Information [Line Items]
Gain (loss) on extinguishment of debt				(8.5)	$ (9.9)
Interest Income
Segment Reporting Information [Line Items]
Interest income from arbitration settlement				3.3
Access Equipment
Segment Reporting Information [Line Items]
Restructuring provision				10.4	4.7
Accelerated depreciation related to restructuring				2.8
Access Equipment | Operating Expenses
Segment Reporting Information [Line Items]
Restructuring provision				4.7	24.8
Defense
Segment Reporting Information [Line Items]
Reimbursement of legal costs associated with arbitration settlement				0.9
Former Gain Contingency, Recognized in Current Period	4.2			4.2	19
Fire & Emergency
Segment Reporting Information [Line Items]
Restructuring provision				1.4
Commercial
Segment Reporting Information [Line Items]
Restructuring provision				1.5	5.4
Former Gain Contingency, Recognized in Current Period	1.5			1.5
Accelerated depreciation related to restructuring				4.1
Gain on Business Interruption Insurance Recovery	18.5			18.5	6.6
Gain (Loss) on Disposition of Business	$ 3.1			3.1	(1.4)
Commercial | Operating Income
Segment Reporting Information [Line Items]
Gain on Business Interruption Insurance Recovery				12.3	$ 6.6
Corporate, Non-segment
Segment Reporting Information [Line Items]
Restructuring provision				$ 1.1

Business Segment Information _5

Business Segment Information - Schedule of Depreciation, Amortization and Capital Expenditure by Segment (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Depreciation and amortization		$ 104.2	$ 115.2	$ 120.5
Capital expenditures		130.2	174.2	100.1
Operating Segments | Access Equipment
Segment Reporting Information [Line Items]
Depreciation and amortization	[1]	42.1	58.2	61.1
Capital expenditures	[2]	56.5	61.4	34.2
Operating Segments | Defense
Segment Reporting Information [Line Items]
Depreciation and amortization		20.1	17.3	15.2
Capital expenditures		32.3	31.4	29.1
Operating Segments | Fire & Emergency
Segment Reporting Information [Line Items]
Depreciation and amortization		10	9.5	9.5
Capital expenditures		6.8	12.8	12.8
Operating Segments | Commercial
Segment Reporting Information [Line Items]
Depreciation and amortization	[3]	17.1	12.4	12.9
Capital expenditures	[2]	18.9	18.1	12
Corporate, Non-segment
Segment Reporting Information [Line Items]
Depreciation and amortization		14.9	17.8	21.8
Capital expenditures	[4]	$ 15.7	$ 50.5	$ 12
[1]	Includes $2.8 million of accelerated deprecation associated with restructuring actions in fiscal 2020.
[2]	Capital expenditures include both the purchase of property, plant and equipment and equipment held for rental.
[3]	Includes $4.1 million of accelerated deprecation associated with restructuring actions in fiscal 2020.
[4]	Capital expenditures include capital spending for the construction of the Company’s new global headquarters.

Business Segment Information _6

Business Segment Information - Schedule of Depreciation, Amortization and Capital Expenditure by Segment (Parenthetical) (Details) $ in Millions	12 Months Ended
	Sep. 30, 2020USD ($)
Segment Reporting Information [Line Items]
Accelerated depreciation related to restructuring	$ 6.9
Access Equipment
Segment Reporting Information [Line Items]
Accelerated depreciation related to restructuring	2.8
Commercial
Segment Reporting Information [Line Items]
Accelerated depreciation related to restructuring	$ 4.1

Business Segment Information _7

Business Segment Information - Schedule of Identifiable Assets by Business Segments and by Geographical Segments (Details) - USD ($) $ in Millions		Sep. 30, 2020	Sep. 30, 2019
Assets
Assets		$ 5,815.9	$ 5,566.3
Operating Segments | Access Equipment
Assets
Assets		2,893.8	2,973.2
Operating Segments | Access Equipment | United States
Assets
Assets		2,151.4	2,317.2
Operating Segments | Access Equipment | Europe, Africa and Middle East
Assets
Assets		383.4	403.4
Operating Segments | Access Equipment | Rest of the World
Assets
Assets	[1]	359	252.6
Operating Segments | Defense
Assets
Assets		1,062.7	889.7
Operating Segments | Defense | United States
Assets
Assets		1,055.5	883
Operating Segments | Defense | Rest of the World
Assets
Assets		7.2	6.7
Operating Segments | Fire & Emergency | United States
Assets
Assets		586.8	587.9
Operating Segments | Commercial
Assets
Assets		418.2	432.5
Operating Segments | Commercial | United States
Assets
Assets		370.7	383.6
Operating Segments | Commercial | Rest of the World
Assets
Assets		47.5	48.9
Corporate, Non-segment
Assets
Assets		854.4	683
Corporate, Non-segment | United States
Assets
Assets	[2]	$ 854.4	597.6
Corporate, Non-segment | Rest of the World
Assets
Assets	[1]		$ 85.4
[1]	Control of a shared manufacturing facility in Mexico transferred to the Access Equipment segment effective October 1, 2019.
[2]	Primarily includes cash and short-term investments and the Company’s global headquarters.

Business Segment Information _8

Business Segment Information - Schedule of Net Sales by Geographical Segments (Details) - USD ($) $ in Millions	3 Months Ended												12 Months Ended
	Sep. 30, 2020	[1]	Jun. 30, 2020	[2]	Mar. 31, 2020	[3]	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	[4]	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	$ 1,784.2		$ 1,580.8		$ 1,796.7		$ 1,695.1	$ 2,195.7	$ 2,392.7	$ 1,990.2	$ 1,803.4		$ 6,856.8	$ 8,382	$ 7,705.5
North America
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													6,023.7	7,216.6	6,489.6
Europe, Africa and Middle East
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													413.7	664.2	851.8
Rest of the World
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													419.4	501.2	364.1
Intersegment Eliminations
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													(25.4)	(18.1)	(24.6)
Intersegment Eliminations | North America
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													(25.4)	(18.1)	(24.6)
Access Equipment
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													2,505.7	4,079.7	3,776.8
Access Equipment | Operating Segments
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													2,515.1	4,079.7	3,776.8
Access Equipment | Operating Segments | North America
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													1,881.6	3,147.9	2,849.9
Access Equipment | Operating Segments | Europe, Africa and Middle East
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													275.3	548.6	630.2
Access Equipment | Operating Segments | Rest of the World
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													358.2	383.2	296.7
Access Equipment | Intersegment Eliminations
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													9.4
Defense
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													2,260.3	2,030.3	1,827.3
Defense | Operating Segments
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													2,262.2	2,032.1	1,828.9
Defense | Operating Segments | North America
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													2,151.1	1,946.7	1,612.9
Defense | Operating Segments | Europe, Africa and Middle East
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													107	84	215
Defense | Operating Segments | Rest of the World
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													4.1	1.4	1
Defense | Intersegment Eliminations
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													1.9	1.8	1.6
Fire & Emergency
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													1,138.1	1,249.8	1,053.6
Fire & Emergency | Operating Segments
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													1,147.1	1,266.1	1,069.7
Fire & Emergency | Operating Segments | North America
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													1,069.4	1,142.3	1,006.8
Fire & Emergency | Operating Segments | Europe, Africa and Middle East
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													29.8	27.7	4.7
Fire & Emergency | Operating Segments | Rest of the World
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													47.9	96.1	58.2
Fire & Emergency | Intersegment Eliminations
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													9	16.3	16.1
Commercial
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													951.3	1,020.1	1,046.8
Commercial | Operating Segments
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													957.8	1,022.2	1,054.7
Commercial | Operating Segments | North America
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													947	997.8	1,044.6
Commercial | Operating Segments | Europe, Africa and Middle East
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													1.6	3.9	1.9
Commercial | Operating Segments | Rest of the World
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													9.2	20.5	8.2
Commercial | Intersegment Eliminations
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues													$ 6.5	$ 2.1	$ 7.9
[1]
[2]
[3]
[4]	The first quarter of fiscal 2019 was impacted by tax expense related to tax reform in the U.S. of $7.0 million.

Unaudited Quarterly Results - S

Unaudited Quarterly Results - Schedule of Unaudited Quarterly Results (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended												12 Months Ended
	Sep. 30, 2020	[1]	Jun. 30, 2020	[2]	Mar. 31, 2020	[3]	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	[4]	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 1,784.2		$ 1,580.8		$ 1,796.7		$ 1,695.1	$ 2,195.7	$ 2,392.7	$ 1,990.2	$ 1,803.4		$ 6,856.8	$ 8,382	$ 7,705.5
Gross income	280.9		257.5		292.4		289.5	397.3	433.9	357.9	328.3		1,120.3	1,517.4	1,358.6
Operating income	127.4		118.6		133.6		109.1	203.1	257.8	175.6	160.5		488.7	797	656
Net income	$ 100		$ 80.2		$ 68.6		$ 75.7	$ 150	$ 191.9	$ 128.5	$ 109		$ 324.5	$ 579.4	$ 471.9
Earnings per share:
Basic	$ 1.47		$ 1.18		$ 1		$ 1.11	$ 2.20	$ 2.74	$ 1.84	$ 1.53
Diluted	1.46		1.17		0.99		1.10	2.17	2.72	1.82	1.51
Common Stock per share dividends	$ 0.30		$ 0.30		$ 0.30		$ 0.30	$ 0.27	$ 0.27	$ 0.27	$ 0.27		$ 1.20	$ 1.08	$ 0.96
[1]
[2]
[3]
[4]	The first quarter of fiscal 2019 was impacted by tax expense related to tax reform in the U.S. of $7.0 million.

Unaudited Quarterly Results -_2

Unaudited Quarterly Results - Schedule of Unaudited Quarterly Results (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2018	Sep. 30, 2020	Sep. 30, 2018
Effect Of Fourth Quarter Events [Line Items]
Restructuring charges	$ 13	$ 10.2			$ 14.4
Restructuring charge, net of tax	9.5	$ 8.4
Gain (loss) on extinguishment of debt			$ (8.5)
Extinguishment of Debt, Gain (Loss), Net of Tax			(6.5)
Tax Cuts and Jobs Act, Income Tax Expense (Benefit)				$ 7
Europe
Effect Of Fourth Quarter Events [Line Items]
Valuation allowance on foreign net deferred tax assets			$ 11.4
Defense
Effect Of Fourth Quarter Events [Line Items]
Former Gain Contingency, Recognized in Current Period	4.2				4.2	$ 19
Gain Contingency, Net of Tax	3.2				3.2
Commercial
Effect Of Fourth Quarter Events [Line Items]
Restructuring charges					1.5	5.4
Former Gain Contingency, Recognized in Current Period	1.5				1.5
Gain on Business Interruption Insurance Recovery	18.5				18.5	6.6
Gain on Business Interruption Insurance Recovery, Net of Tax	14.2
Gain (Loss) on Disposition of Business	3.1				$ 3.1	$ (1.4)
Gain (Loss) on Disposition of Business, Net of Tax	$ 2.8