Modine Manufacturing (MOD) 10-K 27 May 21 2021 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	May 21, 2021	Sep. 30, 2020
Cover [Abstract]
Entity Registrant Name	MODINE MANUFACTURING CO
Entity Central Index Key	0000067347
Current Fiscal Year End Date	--03-31
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Document Transition Report	false
Entity File Number	1-1373
Entity Incorporation, State or Country Code	WI
Entity Tax Identification Number	39-0482000
Entity Address, Address Line One	1500 DeKoven Avenue
Entity Address, City or Town	Racine
Entity Address, State or Province	WI
Entity Address, Postal Zip Code	53403
City Area Code	262
Local Phone Number	636-1200
Title of 12(b) Security	Common Stock, $0.625 par value
Trading Symbol	MOD
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 313
Entity Common Stock, Shares Outstanding		51,626,626

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 1,808.4	$ 1,975.5	$ 2,212.7
Cost of sales	1,515	1,668	1,847.2
Gross profit	293.4	307.5	365.5
Selling, general and administrative expenses	210.9	249.6	244.1
Restructuring expenses	13.4	12.2	9.6
Impairment charges	166.8	8.6	0.4
(Gain) loss on sale of assets	0	(0.8)	1.7
Operating (loss) income	(97.7)	37.9	109.7
Interest expense	(19.4)	(22.7)	(24.8)
Other expense - net	(2.2)	(4.8)	(4.1)
(Loss) earnings before income taxes	(119.3)	10.4	80.8
(Provision) benefit for income taxes	(90.2)	(12.4)	5.1
Net (loss) earnings	(209.5)	(2)	85.9
Net earnings attributable to noncontrolling interest	(1.2)	(0.2)	(1.1)
Net (loss) earnings attributable to Modine	$ (210.7)	$ (2.2)	$ 84.8
Net (loss) earnings per share attributable to Modine shareholders:
Basic (in dollars per share)	$ (4.11)	$ (0.04)	$ 1.67
Diluted (in dollars per share)	$ (4.11)	$ (0.04)	$ 1.65
Weighted-average shares outstanding:
Basic (in shares)	51.3	50.8	50.5
Diluted (in shares)	51.3	50.8	51.3

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net (loss) earnings	$ (209.5)	$ (2)	$ 85.9
Other comprehensive income (loss):
Foreign currency translation	30.9	(19.2)	(37.6)
Defined benefit plans, net of income taxes of $10.4, ($8.3) and ($0.3) million	30.1	(24.6)	(1.4)
Cash flow hedges, net of income taxes of $0.6, ($0.5) and $0.1 million	1.6	(1.5)	0.4
Total other comprehensive income (loss)	62.6	(45.3)	(38.6)
Comprehensive income (loss)	(146.9)	(47.3)	47.3
Comprehensive (income) loss attributable to noncontrolling interest	(1.7)	0.2	(0.6)
Comprehensive income (loss) attributable to Modine	$ (148.6)	$ (47.1)	$ 46.7

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Other comprehensive income (loss):
Defined benefit plans, tax	$ 10.4	$ (8.3)	$ (0.3)
Cash flow hedges, tax expense	$ 0.6	$ (0.5)	$ 0.1

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions		Mar. 31, 2021	Mar. 31, 2020
ASSETS
Cash and cash equivalents		$ 37.8	$ 70.9
Trade accounts receivable - net		267.9	292.5
Inventories		195.6	207.4
Assets held for sale		107.6	0
Other current assets		35.9	62.5
Total current assets		644.8	633.3
Property, plant and equipment - net	[1]	269.9	448
Intangible assets - net		100.6	106.3
Goodwill		170.7	166.1
Deferred income taxes		24.5	104.8
Other noncurrent assets		66.2	77.6
Total assets		1,276.7	1,536.1
LIABILITIES AND SHAREHOLDERS' EQUITY
Short-term debt		1.4	14.8
Long-term debt - current portion		21.9	15.6
Accounts payable		233.9	227.4
Accrued compensation and employee benefits		66.5	65
Liabilities held for sale		103.3	0
Other current liabilities		42.2	49.2
Total current liabilities		469.2	372
Long-term debt		311.2	452
Deferred income taxes		5.9	8.1
Pensions		58.6	130.9
Other noncurrent liabilities		75.7	79.5
Total liabilities		920.6	1,042.5
Commitments and contingencies (see Note 20)
Shareholders' equity:
Preferred stock, $0.025 par value, authorized 16.0 million shares, issued - none		0	0
Common stock, $0.625 par value, authorized 80.0 million shares, issued 54.3 million and 53.4 million shares		33.9	33.3
Additional paid-in capital		255	245.1
Retained earnings		259.2	469.9
Accumulated other comprehensive loss		(161.2)	(223.3)
Treasury stock, at cost, 2.7 million and 2.5 million shares		(38.2)	(37.1)
Total Modine shareholders' equity		348.7	487.9
Noncontrolling interest		7.4	5.7
Total equity		356.1	493.6
Total liabilities and equity		$ 1,276.7	$ 1,536.1
[1]	In connection with the pending sales of the liquid- and air-cooled automotive businesses within the Automotive segment, the Company wrote-down the carrying value of the disposal groups’ property, plant and equipment to zero as of March 31, 2021.  The assets impaired were located in Hungary, Germany, Austria, China, the U.S., Italy, and the Netherlands.  See Note 2 for additional information on the held for sale businesses and impairment charges recorded during fiscal 2021.

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares shares in Millions	Mar. 31, 2021	Mar. 31, 2020
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.025	$ 0.025
Preferred stock, shares authorized (in shares)	16	16
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.625	$ 0.625
Common stock, shares authorized (in shares)	80	80
Common stock, shares issued (in shares)	54.3	53.4
Treasury stock at cost (in shares)	2.7	2.5

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net (loss) earnings	$ (209.5)	$ (2)	$ 85.9
Adjustments to reconcile net (loss) earnings to net cash provided by operating activities:
Depreciation and amortization	68.6	77.1	76.9
Impairment charges	166.8	8.6	0.4
(Gain) loss on sale of assets	0	(0.8)	1.7
Stock-based compensation expense	6.3	6.6	7.9
Deferred income taxes	67.9	1	(4.4)
Other - net	6.3	5.6	5.3
Changes in operating assets and liabilities:
Trade accounts receivable	(17.1)	36.6	(15.3)
Inventories	(5)	(12)	(22)
Accounts payable	44	(37.7)	16.6
Accrued compensation and employee benefits	15.7	(15.2)	(10.1)
Other assets	27.5	14.7	(11.8)
Other liabilities	(21.7)	(24.6)	(27.8)
Net cash provided by operating activities	149.8	57.9	103.3
Cash flows from investing activities:
Expenditures for property, plant and equipment	(32.7)	(71.3)	(73.9)
Proceeds from dispositions of assets	0.7	6.2	0.3
Proceeds from sale of investment in affiliate	0	3.8	0
Proceeds from maturities of short-term investments	3.4	4.1	4.9
Purchases of short-term investments	(3.6)	(3.3)	(3.8)
Other - net	0.9	0	(0.3)
Net cash used for investing activities	(31.3)	(60.5)	(72.8)
Cash flows from financing activities:
Borrowings of debt	32.7	672	221.3
Repayments of debt	(183.6)	(630.3)	(241.9)
Borrowings on bank overdraft facilities - net	3.6	1.2	(0.1)
Dividend paid to noncontrolling interest	0	(1.3)	(1.8)
Purchase of treasury stock under share repurchase program	0	(2.4)	(0.6)
Financing fees paid	(0.8)	(2.8)	0
Other - net	3	(3.1)	(2.8)
Net cash (used for) provided by financing activities	(145.1)	33.3	(25.9)
Effect of exchange rate changes on cash	1.4	(1.6)	(2.7)
Net (decrease) increase in cash, cash equivalents, restricted cash and cash held for sale	(25.2)	29.1	1.9
Cash, cash equivalents, restricted cash and cash held for sale - beginning of year	71.3	42.2	40.3
Cash, cash equivalents, restricted cash and cash held for sale - end of year	$ 46.1	$ 71.3	$ 42.2

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock, at Cost [Member]	Non-controlling Interest [Member]	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Accumulated Other Comprehensive Loss [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Treasury Stock, at Cost [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]Non-controlling Interest [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at Mar. 31, 2018	$ 32.7	$ 229.9	$ 394.9	$ (140.3)	$ (27.1)	$ 8.4	$ 498.5
Balance (Revenue Recognition [Member]) at Mar. 31, 2018								$ 0	$ 0	$ (7.6)	$ 0	$ 0	$ 0	$ (7.6)
Balance (in shares) at Mar. 31, 2018	52.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	$ 0	0	84.8	0	0	1.1	85.9
Other comprehensive income (loss)	0	0	0	(38.1)	0	(0.5)	(38.6)
Stock options and awards	$ 0.3	0.8	0	0	0	0	1.1
Stock options and awards (in shares)	0.5
Purchase of treasury stock	$ 0	0	0	0	(4.3)	0	(4.3)
Stock-based compensation expense	0	7.9	0	0	0	0	7.9
Dividend paid to noncontrolling interest	0	0	0	0	0	(1.8)	(1.8)
Balance at Mar. 31, 2019	$ 33	238.6	472.1	(178.4)	(31.4)	7.2	541.1
Balance (in shares) at Mar. 31, 2019	52.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	$ 0	0	(2.2)	0	0	0.2	(2)
Other comprehensive income (loss)	0	0	0	(44.9)	0	(0.4)	(45.3)
Stock options and awards	$ 0.3	(0.1)	0	0	0	0	0.2
Stock options and awards (in shares)	0.6
Purchase of treasury stock	$ 0	0	0	0	(5.7)	0	(5.7)
Stock-based compensation expense	0	6.6	0	0	0	0	6.6
Dividend paid to noncontrolling interest	0	0	0	0	0	(1.3)	(1.3)
Balance at Mar. 31, 2020	$ 33.3	245.1	469.9	(223.3)	(37.1)	5.7	$ 493.6
Balance (in shares) at Mar. 31, 2020	53.4						53.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	$ 0	0	(210.7)	0	0	1.2	$ (209.5)
Other comprehensive income (loss)	0	0	0	62.1	0	0.5	62.6
Stock options and awards	$ 0.6	3.6	0	0	0	0	4.2
Stock options and awards (in shares)	0.9
Purchase of treasury stock	$ 0	0	0	0	(1.1)	0	(1.1)
Stock-based compensation expense	0	6.3	0	0	0	0	6.3
Balance at Mar. 31, 2021	$ 33.9	$ 255	$ 259.2	$ (161.2)	$ (38.2)	$ 7.4	$ 356.1
Balance (in shares) at Mar. 31, 2021	54.3						54.3

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Mar. 31, 2021
Significant Accounting Policies [Abstract]
Significant Accounting Policies	Note 1: Significant Accounting Policies Nature of Operations Modine Manufacturing Company (“Modine” or the “Company”) specializes in providing innovative thermal management solutions to diversified global markets and customers. The Company is a global leader in thermal management technology and solutions for sale into a wide array of commercial, industrial, and building heating, ventilating, air conditioning, and refrigeration (“HVAC&R”) markets. In addition, the Company is a leading provider of engineered heat transfer systems and high-quality heat transfer components for use in on- and off-highway original equipment manufacturer (“OEM”) vehicular applications. The Company’s primary product groups include i) heating, ventilation and air conditioning; ii) coils, coolers, and coatings; and iii) powertrain cooling and engine cooling. COVID -19 In March 2020 the World Health Organization declared the outbreak of the novel coronavirus, COVID-19 a pandemic. See Note 20 for additional information regarding the risks and uncertainties to our business resulting from this global pandemic. Disposition of Air-cooled Automotive Business On February 19, 2021 the Company signed a definitive agreement to sell its air-cooled automotive business to Schmid Metall GmbH. In connection with this sale, which closed on April 30, 2021 the Company classified the air-cooled automotive business as held for sale as of March 31, 2021 Accordingly, the Company has reported the assets and liabilities of this business as held for sale on the March 31, 2021 consolidated balance sheet. See Note 2 for additional information. Pending Disposition of Liquid-cooled Automotive Business On November 2, 2020 the Company signed a definitive agreement to sell its liquid-cooled automotive business to Dana Incorporated. In connection with the pending sale, the Company classified the liquid-cooled automotive business as held for sale and, accordingly, has reported the assets and liabilities of this business as held for sale on the March 31, 2021 consolidated balance sheet. See Note 2 for additional information. Chief Executive Officer (“CEO”) Transition In August 2020 Thomas A. Burke stepped down from his position as President and CEO. The Board of Directors subsequently conducted a search for his successor and, effective December 1, 2020 appointed Neil D. Brinker as President and CEO. As a result of Mr. Burke’s departure and in connection with the search for and transition to his successor, the Company recorded costs totaling during fiscal 2021 These costs, which were recorded as selling, general and administrative (“SG&A”) expenses at Corporate, primarily consisted of severance and benefit-related expenses based upon the terms of Mr. Burke’s transition and separation agreement and costs directly associated with the CEO search, partially offset by the impact of Mr. Burke’s forfeited stock-based compensation awards. Sale of Facility in Germany During fiscal 2020 , the Company completed the sale of a previously-closed manufacturing facility in Germany for a selling price of $ million. As a result of this transaction, the Company recorded a gain of $ within the Automotive segment. The Company reported this gain within the gain on sale of assets line on the consolidated statements of operations. Sale of Nikkei Heat Exchanger Company, Ltd. (“NEX”) During fiscal 2020 , the Company completed the sale of its ownership interest in NEX for a selling price of $ million. As a result of this sale, the Company recorded a gain of $ million, which included the write-off of accumulated foreign currency translation gains of $ million, within other income and expense on the consolidated statements of operations. Prior to its sale, the Company accounted for its investment in NEX using the equity method and reported its equity in earnings from NEX within other income and expense in the consolidated statements of operations. The Company’s share of NEX’s earnings for fiscal 2020 and 2019 was and , respectively. Sale of AIAC Air Conditioning South Africa (Pty) Ltd. During fiscal 2019 the Company completed the sale of its AIAC Air Conditioning South Africa (Pty) Ltd. business, which was reported within the Building HVAC Systems segment, for a selling price of . As a result of this transaction, the Company recorded a loss of , which included the write-off of accumulated foreign currency translation losses of . The Company reported this loss within the loss on sale of assets line on the consolidated statements of operations. Annual net sales attributable to this disposed business were less than . Basis of Presentation The Company prepares its consolidated financial statements in conformity with generally accepted accounting principles (“GAAP”) in the United States. These principles require management to make certain estimates and assumptions in determining assets, liabilities, revenue, expenses and related disclosures. Actual amounts could differ materially from those estimates. Consolidation Principles The consolidated financial statements include the accounts of Modine Manufacturing Company and its majority-owned or Modine-controlled subsidiaries. The Company eliminates intercompany transactions and balances in consolidation. Revenue Recognition The Company recognizes revenue based upon consideration specified in a contract and as it satisfies performance obligations by transferring control over its products to its customers, which may be at a point in time or over time. The majority of the Company’s revenue is recognized at a point in time, based upon shipment terms. A portion of the Company’s revenue is recognized over time, based upon estimated progress towards satisfaction of the contractual performance obligations. See Note 3 for additional information. Shipping and Handling Costs The Company records shipping and handling costs incurred upon the shipment of products to its customers in cost of sales, and related amounts billed to these customers in net sales. Trade Accounts Receivable The Company records trade receivables at the invoiced amount. Trade receivables do not bear interest if paid according to the original terms. The Company maintains an allowance for credit losses, representing its estimate of expected losses associated with its trade accounts receivable. The Company bases its estimate using historical loss experience and considers the aging of the receivables and risks specific to customers where appropriate. At March 31, 2021 and 2020, the allowance for credit losses was $1.3 million and $1.9 million, respectively. The Company enters into supply chain financing programs from time to time to sell accounts receivable, without recourse, to third-party financial institutions. Sales of accounts receivable are reflected as a reduction of accounts receivable on the consolidated balance sheets and the proceeds are included in cash flows from operating activities in the consolidated statements of cash flows. During fiscal 2021, 2020, and 2019, the Company sold $88.7 million, $75.4 million, and $85.1 million, respectively, of accounts receivable to accelerate cash receipts. During fiscal 2021, 2020, and 2019, the Company recorded a loss on the sale of accounts receivable of $0.2 million, $0.5 million, and $0.6 million, respectively, in the consolidated statements of operations. Warranty The Company provides product warranties for specific product lines and accrues for estimated future warranty costs in the period in which the sale is recorded. The Company records warranty expense, within cost of sales, based upon historical and current claims data or based upon estimated future claims. Accrual balances, which are recorded within other current liabilities, are monitored and adjusted if it is probable that expected claims will differ from previous estimates. See Note 15 for additional information. T ooling The Company accounts for production tooling costs as a component of property, plant and equipment when it owns title to the tooling and amortizes the capitalized cost to cost of sales over the estimated life of the asset, which is generally . At March 31, 2021 and 2020 Company-owned tooling totaled and , respectively. The decrease in Company-owned tooling during fiscal 2021 was primarily due to asset impairment charges recorded within the Automotive segment upon classification of the liquid- and air-cooled automotive businesses as held for sale. See Note 2 for additional information. In certain instances, tooling is customer-owned. At the time customer-owned tooling is completed and customer acceptance is obtained, the Company records tooling revenue and related production costs within net sales and cost of sales, respectively, in the consolidated statements of operations. If the customer has agreed to reimburse the Company, unbilled customer-owned tooling costs are recorded as a receivable within other current assets. No significant arrangements exist where customer-owned tooling costs were not accompanied by guaranteed reimbursement. At March 31, 2021 and 2020 customer-owned tooling receivables totaled and , respectively. Of the , was included within assets held for sale on the March 31, 2021 consolidated balance sheet. Stock-based Compensation The Company recognizes stock-based compensation using the fair value method. Accordingly, compensation expense for stock options, restricted stock and performance-based stock awards is calculated based upon the fair value of the instruments at the time of grant, and is recognized as expense over the respective vesting periods. See Note 5 for additional information. Research and Development The Company expenses research and development costs as incurred within SG&A expenses. During fiscal 2021, 2020, and 2019, research and development costs totaled Translation of Foreign Currencies The Company translates assets and liabilities of foreign subsidiaries and equity investments into U.S. dollars at the period-end exchange rates, and translates income and expense items at the monthly average exchange rate for the period in which the transactions occur. The Company reports resulting translation adjustments within accumulated other comprehensive income (loss) within shareholders’ equity. The Company includes foreign currency transaction gains or losses in the statement of operations within other income and expense. Derivative Instruments The Company enters into derivative financial instruments from time to time to manage certain financial risks. The Company enters into forward contracts to reduce exposure to changing future purchase prices for aluminum and copper and into foreign currency exchange contracts to hedge specific foreign currency-denominated assets and liabilities as well as forecasted transactions. The Company designates certain derivative financial instruments as cash flow hedges for accounting purposes. These instruments are used to manage financial risks and are not speculative. See Note 19 for additional information. Income Taxes The Company determines deferred tax assets and liabilities based upon the difference between the amounts reported in the financial statements and the tax basis of assets and liabilities, using enacted tax rates in effect in the years in which the differences are expected to reverse. The Company establishes a valuation allowance if it is more likely than not that a deferred tax asset, or portion thereof, will not be realized. The Company records the tax effects of global intangible low-taxed income (“GILTI”) as a period expense in the applicable tax year. The Company uses the portfolio approach for releasing income tax effects from accumulated other comprehensive income (loss). See Note 8 for additional information. Earnings per Share The Company calculates basic earnings per share based upon the weighted-average number of common shares outstanding during the period, while the calculation of diluted earnings per share includes the dilutive effect of potential common shares outstanding during the period. The calculation of diluted earnings per share excludes potential common shares if their inclusion would have an anti-dilutive effect. In prior years, certain restricted stock awards provided recipients with a non-forfeitable right to receive dividends declared by the Company. These restricted stock awards have been included in computing earnings per share pursuant to the two-class method. See Note 9 for additional information. Cash and Cash Equivalents The Company considers all highly-liquid investments with original maturities of three months or less to be cash equivalents. Under the Company’s cash management system, cash balances at certain banks are funded when checks are presented for payment. To the extent checks issued, but not yet presented for payment, exceed the balance on hand at the specific bank against which they were written, the Company reports the amount of those checks within accounts payable in the consolidated balance sheets. Short-term Investments The Company invests in time deposits with original maturities of more than three months but not more than one year. The Company records these short-term investments at cost, which approximates fair value, within other current assets in the consolidated balance sheets. As of March 31, 2021 and 2020, the Company’s short-term investments totaled $3.7 million and $3.2 million, respectively. Inventories The Company values inventories using a first-in, first-out or weighted-average basis, at the lower of cost and net realizable value. Property, Plant and Equipment The Company records property, plant and equipment at cost. For financial reporting purposes, the Company computes depreciation using the straight-line method over the expected useful lives of the assets. The Company expenses maintenance and repair costs as incurred. The Company capitalizes costs of improvements. Upon the sale or other disposition of an asset, the Company removes the cost and related accumulated depreciation from the accounts and includes the gain or loss in the consolidated statements of operations. Capital expenditures of , and were accrued at March 31, 2021, 2020 and 2019 respectively. Of the , was included within liabilities held for sale on the March 31, 2021 consolidated balance sheet. All of the other accrued capital expenditure amounts are presented within accounts payable. Leases The Company’s most significant leases represent leases of real estate, such as manufacturing facilities, warehouses, and office buildings. The Company also leases certain manufacturing and IT equipment and vehicles. The Company recognizes right-of-use (“ROU”) assets and lease liabilities at the commencement date, based upon the present value of lease payments over the lease term. See Note 16 for additional information. Goodwill The Company does not amortize goodwill; rather, it tests for impairment annually unless conditions exist that would require a more frequent evaluation. The Company performs an assessment of the fair value of its reporting units for goodwill impairment testing based upon, among other things, the present value of expected future cash flows. The Company performed its goodwill impairment test as of March 31, 2021 and determined the fair value of each of its reporting units exceeded the respective book value. See Note 14 for additional information. I mpairment of Held and Used Long-lived Assets The Company reviews held and used long-lived assets, including property, plant and equipment and intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be fully recoverable. In these instances, the Company compares the undiscounted future cash flows expected to be generated from the asset with its carrying value. If the asset’s carrying value exceeds expected future cash flows, the Company measures and records an impairment loss, if any, as the amount by which the carrying value of the asset exceeds its fair value. The Company estimates fair value using a variety of valuation techniques, including discounted cash flows, market values and comparison values for similar assets. Assets Held for Sale The Company considers assets to be held for sale when management approves and commits to a formal plan to actively market the asset for sale at a reasonable price in relation to its fair value, the asset is available for immediate sale in its present condition, an active program to locate a buyer and other actions required to complete the sale have been initiated, the sale of the asset is expected to be completed within one year and it is unlikely that significant changes will be made to the plan. Upon designation as held for sale, the Company records the carrying value of the assets at the lower of its carrying value or its estimated fair value, less costs to sell. The Company ceases to record depreciation expense at the time of designation as held for sale. During fiscal 2021 the Company classified the liquid- and air-cooled automotive businesses as held for sale and recorded impairment charges totaling within the Automotive segment. See Note 2 for additional information. Deferred Compensation Trusts The Company maintains deferred compensation trusts to fund future obligations under its non-qualified deferred compensation plans. The trusts’ investments in third-party debt and equity securities are presented within other noncurrent assets in the consolidated balance sheets. Self-insurance Reserves The Company retains a portion of the financial risk for certain insurance coverage, including property, general liability, workers compensation, and employee healthcare, and therefore maintains reserves that estimate the impact of unreported and under-reported claims that fall below various stop-loss limits and deductibles under its insurance policies. The Company maintains reserves for the estimated settlement cost of known claims, as well as estimates of incurred but not reported claims. The Company charges costs of claims, including the impact of changes in reserves due to claim experience and severity, to operations. The Company reviews and updates the amount of its insurance-related reserves on a quarterly basis. Environmental Liabilities The Company records liabilities for environmental assessments and remediation activities in the period in which its responsibility is probable and the costs can be reasonably estimated. The Company records environmental indemnification assets from third parties, including prior owners, when recovery is probable. To the extent that the required remediation procedures change, or additional contamination is identified, the Company’s estimated environmental liabilities may also change. See Note 20 for additional information. S upplemental Cash Flow Information Years ended March 31, 2021 2020 2019 Interest paid $ 17.9 $ 21.4 $ 22.3 Income taxes paid 19.7 18.8 22.2 See Note 16 for supplemental cash flow information related to the Company’s leases. New Accounting Guidance Adopted in Fiscal 2021 Credit Losses In June 2016 the Financial Accounting Standards Board (“FASB”) issued new guidance related to the accounting for credit losses for certain financial assets, including trade accounts receivable and contract assets. The new guidance modifies the credit loss model to measure and recognize credit losses based upon expected losses rather than incurred losses. The Company adopted this guidance as of April 1, 2020 The adoption did not have a material impact on the Company’s consolidated balance sheets, statements of operations or statements of cash flows. New Accounting Guidance Adopted in Fiscal 2020 Leases In February 2016 the FASB issued new comprehensive lease accounting guidance that requires balance sheet recognition for most leases. The Company adopted this guidance effective April 1, 2019 using a modified-retrospective transition method, under which it elected not to adjust comparative periods. The Company elected the package of practical expedients permitted under the new guidance, and, as a result, the Company did not reassess the classification of existing leases or initial direct costs thereof, or whether existing contracts contain leases. In addition, the Company elected accounting policies to not record short-term leases on the balance sheet and to not separate lease and non-lease components. The Company did not elect the hindsight practical expedient. Upon adoption of this new guidance on April 1, 2019, the Company recognized right-of-use assets for operating leases totaling $61.3 million and corresponding current noncurrent Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income In February 2018, the FASB issued new guidance related to the accounting for certain stranded income tax effects in accumulated other comprehensive income (loss) resulting from tax reform legislation that was enacted in the U.S. in December 2017. This guidance provided companies the option to reclassify stranded income tax effects to retained earnings. The Company adopted this guidance as of April 1, 2019 and chose not to reclassify stranded income tax effects; therefore, the adoption of this guidance did not impact the Company’s consolidated financial statements. New Accounting Guidance Adopted in Fiscal 2019 Revenue Recognition In May 2014 the FASB issued new guidance that outlines a comprehensive model for entities to use in accounting for revenue arising from contracts with customers. The core principle of the new guidance is that companies are to recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company adopted this new guidance for fiscal 2019 using the modified-retrospective transition method. As a result of its adoption of the new guidance, the Company recorded an increase of to retained earnings as of April 1, 2018 along with related balance sheet reclassifications. See Note 3 for additional information regarding revenue recognition. Income Taxes: Intra-Entity Transfers of Assets Other than Inventory In October 2016, the FASB issued new guidance related to income tax accounting for intercompany asset transfers. This new guidance requires companies to recognize the income tax effects of intercompany asset transfers other than inventory at the transaction date. The income tax effects of these transfers were previously deferred. The Company adopted this new guidance for fiscal 2019 using the modified-retrospective transition method. Upon adoption, the Company recorded a decrease to retained earnings of $8.3 million as of April 1, 2018.

Assets Held for Sale

Assets Held for Sale	12 Months Ended
	Mar. 31, 2021
Assets Held for Sale [Abstract]
Assets Held for Sale	Note 2: Assets Held for Sale On November 2, 2020, the Company signed a definitive agreement to sell its liquid-cooled automotive business to Dana Incorporated, subject to the receipt of governmental and third-party approvals an d satisfaction of other closing conditions. As of March 31, 2021, the Company anticipated the transaction would close during the first quarter of fiscal 2022. However, the Company and the buyer are currently working together through the regulatory approval process. At this time, the Company is not able to estimate the ultimate impact of the regulatory approval process or the clos On February 19, 2021, the Company signed a definitive agreement to sell its air-cooled automotive business to Schmid Metall GmbH. This transaction closed on April 30, 2021. Based upon its preliminary accounting, the Company expects to record a loss on sale of approximately $6.0 million during the first quarter of fiscal 2022. The estimated loss on sale includes adjustments for cash, debt, and working capital, as defined within the definitive agreement. The Company evaluated this transaction in relation to the pending sale of the liquid-cooled automotive business, described above, and concluded each represents a separate disposal group for purposes of assessing discontinued operations. The Company determined that the air-cooled disposal group did not qualify as a discontinued operation. The Company reports financial results of both the liquid- and air-cooled automotive businesses within its Automotive segment. Once the Company entered into the sale agreements with Board of Director approval, it classified the businesses as held for sale beginning on November 2, 2020 and February 19, 2021, respectively, and ceased depreciating the long-lived assets within the disposal groups. Upon classification as held for sale, the Company compared each disposal group’s carrying value with its fair value, less costs to sell. Based upon the selling prices for each transaction, the Company estimated implied losses in excess of the respective carrying value of each disposal group’s long-lived assets. The disposal groups’ long-lived assets consist entirely of property, plant and equipment and right-of-use lease assets. The Company classified the assets and liabilities of the liquid- and air-cooled automotive businesses as held for sale on the March 31, 2021 consolidated balance sheet. The major classes of assets and liabilities held for sale were as follows: March 31, 2021 ASSETS Cash and cash equivalents $ 8.0 Trade accounts receivables - net 54.4 Inventories 24.7 Other current assets 12.8 Property, plant and equipment - net 164.0 Other noncurrent assets 8.8 Impairment of carrying value (165.1 ) Total assets held for sale $ 107.6 LIABILITIES Short-term debt $ 5.0 Accounts payable 46.3 Accrued compensation and employee benefits 15.5 Other current liabilities 12.2 Pensions 17.8 Other noncurrent liabilities 6.5 Total liabilities held for sale $ 103.3 The Company will reassess the liquid-cooled disposal group’s fair value less costs to sell at each reporting period that it is held for sale until the transaction is completed. The Company expects to record a loss on sale of approximately $20.0 million to $30.0 million upon transaction completion. The loss on sale recorded will be impacted by changes in working capital, costs to sell, net actuarial losses in accumulated other comprehensive loss related to the disposal group’s pension plans, and cumulative translation adjustments. It is possible that the loss on sale recorded could differ materially from the Company’s estimate

Revenue Recognition

Revenue Recognition	12 Months Ended
	Mar. 31, 2021
Revenue Recognition [Abstract]
Revenue Recognition	Note 3: Revenue Recognition The Company generates revenue from selling innovative thermal management products and solutions to diversified global markets and customers. The Company recognizes revenue based upon consideration specified in a contract and as it satisfies performance obligations by transferring control over its products to its customers, which may be at a point in time or over time. The majority of the Company’s revenue is recognized at a point in time, based upon shipment terms. The Company records an allowance for credit losses and accrues for estimated warranty costs at the time of sale. These estimates are based upon historical experience, current business trends, and current economic conditions. The Company accounts for shipping and handling activities as fulfilment costs rather than separate performance obligations, and records shipping and handling costs in cost of sales and related amounts billed to customers in net sales. The Company establishes payment terms with its customers based upon industry and regional practices, which typically do not exceed 90 days. As the Company expects to receive payment from its customers within one year from the time of sale, it disregards the effects of the time value of money in its determination of the transaction price. The Company has not disclosed the value of unsatisfied performance obligations because the revenue associated with customer contracts for which the original expected performance period is greater than one year is immaterial. The following is a description of the Company’s principal revenue-generating activities: Building HVAC Systems (“BHVAC”) The BHVAC segment principally generates revenue from providing a variety of heating, ventilating, and air conditioning products, primarily for commercial buildings and data centers in North America and the U.K., as well as mainland Europe and the Middle East. Heating products are manufactured in the U.S. and are largely sold to independent distributors, who in turn market the heating products to end customers. Because these products are sold to many different customers without contractual or practical limitations, the BHVAC segment recognizes revenue at the time control is transferred to the customer, generally the independent distributor, based upon shipping terms, which is generally upon shipment. Ventilation and air conditioning products are highly-specified to a customer’s needs; however, the underlying sales contracts do not provide the Company with an enforceable right to payment for performance completed to date. As a result, the BHVAC segment recognizes revenue for these products at the time control is transferred to the customer based upon shipping terms, which is generally upon shipment. Commercial and Industrial Solutions (“CIS”) The CIS segment principally generates revenue from providing thermal management products, including customized coils and coolers, to the heating, ventilating, air conditioning, and refrigeration (“HVAC&R”) markets in North America, Europe, and Asia. In addition, the segment applies corrosion protection solutions, which are referred to as coatings, to heat-transfer equipment. For the sale of coils and coolers, individual customer purchase orders generally represent the Company’s contract with its customers. With the exception of a small number of customers, the applicable customer contracts do not provide the Company with an enforceable right to payment for performance completed to date. As a result, the CIS segment recognizes revenue for its sale of coils and coolers primarily at the time control is transferred to the customer based upon shipping terms, which is generally upon shipment. For both sales to customers whose contract cancellation terms provide an enforceable right to payment and sales from the coatings businesses, in which the customers control the heat-transfer equipment being enhanced by the coating application, the CIS segment recognizes revenue over time based upon its estimated progress towards satisfaction of the performance obligations. The segment measures progress by evaluating the production status towards completion of ordered products or services not yet shipped to its customers. Heavy Duty Equipment (“HDE”) and Automotive The HDE and Automotive segments principally generate revenue from providing engineered heat transfer systems and components for use in on- and off-highway original equipment. These segments provide powertrain and engine cooling products, including, but not limited to, radiators, charge air coolers, condensers, oil coolers, EGR coolers, and fuel coolers, to original equipment manufacturers (“OEMs”) in the commercial vehicle, off-highway and automotive and light vehicle markets in the Americas, Europe, and Asia regions. In addition, the segments design customer-owned tooling for OEMs. The HDE segment also serves Brazil’s commercial vehicle and automotive aftermarkets. While the segments provide customized production and service parts to customers under multi-year programs, these programs typically do not contain contractually-guaranteed volumes to be purchased by the customer. As a result, individual purchase orders typically represent the quantities ordered by the customer. With the exception of a small number of HDE customers, the terms within the customer agreement, purchase order, or customer-owned tooling contract do not provide the Company with an enforceable right to payment for performance completed to date. As a result, both the HDE and Automotive segments recognize revenue primarily at the time control is transferred to the customer based upon shipping terms, which is generally upon shipment. In regard to the HDE customers with contractual cancellation terms that provide an enforceable right to payment for performance completed to date, the Company recognizes revenue over time based upon its estimated progress towards satisfaction of the performance obligations. The HDE segment measures progress by evaluating the production status of ordered products not yet shipped to the customer. For certain customer programs, the Company agrees to provide annual price reductions based upon contract terms. For these scheduled price reductions, the Company evaluates whether the provisions represent a material right to the customer, and if so, defers associated revenue as a result. At times, the Company makes up-front incentive payments to certain customers related to future sales under multi-year programs. The Company capitalizes these incentive payments, which it expects to recover through future sales, and amortizes the assets as a reduction to revenue when the related products are sold to customers. Disaggregation of Revenue The tables below present revenue to external customers for each of the Company’s business segments by primary end market, geographic location, and based upon the timing of revenue recognition: Year ended March 31, 2021 BHVAC CIS HDE Automotive Segment Total Primary end market: Commercial HVAC&R $ 181.6 $ 420.6 $ - $ - $ 602.2 Data center cooling 58.7 47.3 - - 106.0 Industrial cooling - 55.4 - - 55.4 Commercial vehicle - - 250.4 14.4 264.8 Off-highway - - 260.7 3.4 264.1 Automotive and light vehicle - - 97.9 357.8 455.7 Other 0.3 8.7 73.1 22.7 104.8 Net sales $ 240.6 $ 532.0 $ 682.1 $ 398.3 $ 1,853.0 Geographic location: Americas $ 144.2 $ 267.7 $ 388.2 $ 51.0 $ 851.1 Europe 96.4 219.8 133.2 282.0 731.4 Asia - 44.5 160.7 65.3 270.5 Net sales $ 240.6 $ 532.0 $ 682.1 $ 398.3 $ 1,853.0 Timing of revenue recognition: Products transferred at a point in time $ 240.6 $ 486.3 $ 655.2 $ 398.3 $ 1,780.4 Products transferred over time - 45.7 26.9 - 72.6 Net sales $ 240.6 $ 532.0 $ 682.1 $ 398.3 $ 1,853.0 Year ended March 31, 2020 BHVAC CIS HDE Automotive Segment Total Primary end market: Commercial HVAC&R $ 176.6 $ 463.1 $ - $ - $ 639.7 Data center cooling 42.7 107.5 - - 150.2 Industrial cooling - 43.5 - - 43.5 Commercial vehicle - - 302.1 21.6 323.7 Off-highway - - 240.8 13.1 253.9 Automotive and light vehicle - - 108.4 400.4 508.8 Other 1.8 9.8 94.6 9.8 116.0 Net sales $ 221.1 $ 623.9 $ 745.9 $ 444.9 $ 2,035.8 Geographic location: Americas $ 139.1 $ 345.9 $ 484.5 $ 70.3 $ 1,039.8 Europe 82.0 232.6 141.2 321.0 776.8 Asia - 45.4 120.2 53.6 219.2 Net sales $ 221.1 $ 623.9 $ 745.9 $ 444.9 $ 2,035.8 Timing of revenue recognition: Products transferred at a point in time $ 221.1 $ 518.2 $ 715.1 $ 444.9 $ 1,899.3 Products transferred over time - 105.7 30.8 - 136.5 Net sales $ 221.1 $ 623.9 $ 745.9 $ 444.9 $ 2,035.8 Year ended March 31, 2019 BHVAC CIS HDE Automotive Segment Total Primary end market: Commercial HVAC&R $ 167.7 $ 506.3 $ - $ - $ 674.0 Data center cooling 41.3 145.7 - - 187.0 Industrial cooling - 47.8 - - 47.8 Commercial vehicle - - 352.6 35.0 387.6 Off-highway - - 298.1 16.0 314.1 Automotive and light vehicle - - 116.7 426.1 542.8 Other 3.4 7.8 104.9 11.8 127.9 Net sales $ 212.4 $ 707.6 $ 872.3 $ 488.9 $ 2,281.2 Geographic location: Americas $ 124.9 $ 413.6 $ 543.0 $ 71.0 $ 1,152.5 Europe 87.5 244.8 177.4 369.4 879.1 Asia - 49.2 151.9 48.5 249.6 Net sales $ 212.4 $ 707.6 $ 872.3 $ 488.9 $ 2,281.2 Timing of revenue recognition: Products transferred at a point in time $ 212.4 $ 571.1 $ 829.1 $ 488.9 $ 2,101.5 Products transferred over time - 136.5 43.2 - 179.7 Net sales $ 212.4 $ 707.6 $ 872.3 $ 488.9 $ 2,281.2 Contract Balances Contract assets and contract liabilities from contracts with customers were as follows: March 31, 2021 March 31, 2020 Contract assets $ 5.7 $ 21.7 Contract liabilities 5.6 5.6 At March 31, 2021, contract assets and contract liabilities exclude amounts classified as held for sale. See Note 2 for additional information. Contract assets, included within other current assets in the consolidated balance sheets, primarily consist of capitalized costs related to customer-owned tooling contracts, wherein the customer has guaranteed reimbursement, and assets recorded for revenue recognized over time, which represent the Company’s rights to consideration for work completed but not yet billed. The $16.0 million decrease in contract assets during fiscal 2021 primarily resulted from a decrease in contract assets for revenue recognized over time and $7.1 million of contract assets within the liquid- and air-cooled automotive businesses that have been classified as held for sale on the March 31, 2021 consolidated balance sheet. Contract liabilities, included within other current liabilities in the consolidated balance sheets, consist of payments received in advance of satisfying performance obligations under customer contracts, including contracts for customer-owned tooling. During fiscal 2021, increases related to customer contracts for which payment was received in advance of the Company’s satisfaction of performance obligations was offset by $2.9 million of contract liabilities within the liquid- and air-cooled automotive businesses that have been classified as held for sale on the March 31, 2021 consolidated balance sheet.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Mar. 31, 2021
Fair Value Measurements [Abstract]
Fair Value Measurements	Note 4: Fair Value Measurements Fair value is defined as the price that would be received for an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants. Fair value measurements are classified under the following hierarchy: • Level 1 – Quoted prices for identical instruments in active markets. • Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs are observable in active markets. • Level 3 – Model-derived valuations in which one or more significant inputs are not observable. When available, the Company uses quoted market prices to determine fair value and classifies such measurements as Level 1. In some cases, where market prices are not available, the Company uses observable market-based inputs to calculate fair value, in which case the measurements are classified as Level 2. If quoted or observable market prices are not available, the Company determines fair value based upon valuation models that use, where possible, market-based data such as interest rates, yield curves or currency rates. These measurements are classified as Level 3. The carrying values of cash, cash equivalents, restricted cash, short-term investments, trade accounts receivable, accounts payable, and short-term debt approximate fair value due to the short-term nature of these instruments. In addition, the Company assesses the fair value of a disposal group for each reporting period it is held for sale. See Note 2 for additional information regarding assets and liabilities held for sale. The fair value of the Company’s long-term debt is disclosed in Note 17. The Company holds investments in deferred compensation trusts to fund obligations under certain non-qualified deferred compensation plans. The Company records the fair value of these investments within other noncurrent assets on its consolidated balance sheets. The Company classifies money market investments held by the trusts within Level 2 of the valuation hierarchy. The Company classifies all other investments held by the trusts within Level 1 of the valuation hierarchy, as it uses quoted market prices to determine the investments’ fair value. The Company’s deferred compensation obligations, which are recorded as other noncurrent liabilities, are recorded at the fair values of the investments held by the trust. At March 31, 2021 and 2020, the fair values of the investments and obligations for the Company’s deferred compensation plans each totaled $2.8 million and $3.8 million, respectively. The $1.0 million decrease in the fair value of the investments since March 31, 2020 was primarily due to participant withdrawals during fiscal 2021. Plan assets related to the Company’s pension plans were classified as follows: March 31, 2021 Level 1 Level 2 Total Money market investments $ - $ 2.5 $ 2.5 Fixed income securities - 8.9 8.9 Pooled equity funds 37.3 - 37.3 U.S. government and agency securities - 14.5 14.5 Other 0.1 1.0 1.1 Fair value excluding investments measured at net asset value 37.4 26.9 64.3 Investments measured at net asset value 119.0 Total fair value $ 183.3 March 31, 2020 Level 1 Level 2 Total Money market investments $ - $ 2.4 $ 2.4 Fixed income securities - 8.7 8.7 Pooled equity funds 17.9 - 17.9 U.S. government and agency securities - 13.1 13.1 Other 0.1 0.7 0.8 Fair value excluding investment measured at net asset value 18.0 24.9 42.9 Investments measured at net asset value 88.2 Total fair value $ 131.1 The Company determined the fair value of money market investments to approximate their net asset values, without discounts for credit quality or liquidity restrictions, and classified them within Level 2 of the valuation hierarchy. The Company determined the fair value of pooled equity funds based upon quoted prices from active markets and classified them within Level 1 of the valuation hierarchy. The Company determined the fair value of fixed income securities and U.S. government and agency securities based upon recent bid prices or the average of recent bid and asking prices when available and, if not available, the Company valued them through matrix pricing models developed by sources considered by management to be reliable. The Company classified these assets within Level 2 of the valuation hierarchy. As of March 31, 2021 and 2020, the Company held no Level 3 assets within its pension plans. As a practical expedient, the Company valued certain investments, including pooled equity, fixed income and a real estate fund, using their net asset value (“NAV”) per unit, and therefore, has not classified these investments within the fair value hierarchy. The terms and conditions for redemptions vary for the investments valued at NAV. The real estate and fixed income investment funds may be redeemed quarterly and monthly, respectively, with a 90-day and 60-day notice period, respectively. Other investments valued at NAV do not have significantly-restrictive redemption frequency or notice period requirements. The Company does not intend to sell or otherwise dispose of these investments at prices different than the NAV per unit.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Mar. 31, 2021
Stock-Based Compensation [Abstract]
Stock-Based Compensation	Note : Stock-Based Compensation The Company’s stock-based incentive programs consist of the following: a long-term incentive plan (“LTIP”) for officers and other executives that consists of stock awards, stock options, and performance-based stock awards granted for retention and performance, a discretionary equity program for other management and key employees, and stock awards for non-employee directors. The Company’s Board of Directors and the Human Capital and Compensation Committee, as applicable, have discretionary authority to set the terms of the stock-based awards. Grants to employees during fiscal were issued under the Company’s Incentive Compensation Plan. In lieu of performance-based stock awards, the Company granted performance cash awards to the LTIP participants in fiscal At present, the Company accomplishes the fulfillment of equity-based grants through the issuance of new common shares. As of March approximately shares authorized under the Incentive Compensation Plan remain available for future grants. Employee participants have the opportunity to deliver back to the Company the number of shares from the vesting of stock awards sufficient to satisfy the individual’s minimum tax withholding obligations. These shares are held as treasury shares. The Company recorded stock-based compensation expense of , , and in fiscal and respectively. Stock Options The Company recorded , , and of compensation expense related to stock options in fiscal and respectively. The fair value of stock options that vested during fiscal and was , , and , respectively. As of March the total compensation expense not yet recognized related to non-vested stock options was and the weighted-average period in which the remaining expense is expected to be recognized was years. The Company estimated the fair value of option awards on the date of grant using the Black-Scholes option valuation model and the following assumptions: Years ended March 31, 2021 2020 2019 Fair value of options $ 3.46 $ 5.56 $ 7.81 Expected life of awards in years 6.1 6.3 6.3 Risk-free interest rate 0.4 % 2.2 % 2.8 % Expected volatility of the Company’s stock 54.1 % 39.2 % 39.7 % Expected dividend yield on the Company’s stock 0.0 % 0.0 % 0.0 % Stock options expire no later than 10 years after the grant date and have an exercise price equal to the fair market value of Modine’s common stock on the date of grant. The risk-free interest rate was based upon yields of U.S. Treasury zero-coupon issues with a term corresponding to the expected life of the options. The expected volatility assumption was based upon changes in the Company’s historical common stock prices over the same time period as the expected life of the awards. The expected dividend yield is zero, as the Company currently does not anticipate paying dividends over the expected life of the options. The expected lives of the awards are based upon historical patterns and the terms of the options. Outstanding options granted vest 25 percent annually for four years. A summary of stock option activity for fiscal 2021 was as follows: Shares Weighted-average exercise price Weighted-average remaining contractual term (years) Aggregate intrinsic value Outstanding, beginning 1.4 $ 12.49 Granted 0.4 6.88 Exercised (0.4 ) 10.56 Forfeited or expired (0.3 ) 10.94 Outstanding, ending 1.1 $ 11.63 7.1 $ 3.9 Exercisable, March 31, 2021 0.5 $ 13.80 5.1 $ 0.9 The aggregate intrinsic value represents the difference between the closing price of Modine’s common shares on the last trading day of fiscal over the exercise price of the stock options, multiplied by the number of options outstanding or exercisable. The aggregate intrinsic value is not recorded for financial statement purposes, and this value will change based upon daily changes in the price of Modine’s common shares. Additional information related to stock options exercised is as follows: Years ended March 31, 2021 2020 2019 Intrinsic value of stock options exercised $ 1.4 $ 0.1 $ 0.7 Proceeds from stock options exercised 4.1 0.1 1.1 Restricted Stock The Company recorded $4.3 million, $4.5 million, and $4.3 million of compensation expense related to restricted stock in fiscal 2021, 2020, and 2019, respectively. The fair value of restricted stock awards that vested during fiscal 2021, 2020, and 2019 was $4.5 million, $4.4 million, and $4.3 million, respectively. At March 31, 2021, the Company had $6.1 million of unrecognized compensation expense related to non-vested restricted stock, which it expects to recognize over a weighted-average period of 2.7 years. The Company values restricted stock awards using the closing market price of its common shares on the date of grant. The restricted stock awards granted annually vest 25 percent per year A summary of restricted stock activity for fiscal 2021 was as follows: Shares Weighted-average price Non-vested balance, beginning 0.5 $ 14.48 Granted 0.8 7.53 Vested (0.5 ) 9.64 Forfeited (0.1 ) 13.40 Non-vested balance, ending 0.7 $ 10.05 Restricted Stock – Performance-Based Shares The Company recorded $1.1 million, $0.8 million, and $2.4 million of compensation expense related to performance-based stock awards in fiscal 2021, 2020, and 2019, respectively. At March 31, 2021, the Company had $0.5 million of unrecognized compensation expense related to non-vested performance-based stock awards, which is expected to be recognized over one year. The Company values performance-based stock awards using the closing market price of its common shares on the date of grant. Shares are earned under the performance portion of the restricted stock award program based upon the attainment of certain financial goals over a period and are awarded after the end of that performance period, if the performance targets have been achieved. The performance metrics for the performance-based stock awards granted in fiscal and are based upon both a target average consolidated cash flow return on invested capital and a target average annual revenue growth at the end of a performance period, commencing with the fiscal year of grant. As noted above, the Company granted performance cash awards in fiscal in lieu of performance-based stock awards. The performance metrics for these cash awards are the same as the metrics for the fiscal and performance-based stock awards.

Restructuring Activities

Restructuring Activities	12 Months Ended
	Mar. 31, 2021
Restructuring Activities [Abstract]
Restructuring Activities	Note : Restructuring Activities During fiscal restructuring actions consisted primarily of targeted headcount reductions and plant consolidation activities. The targeted headcount reductions were primarily in Europe within the Automotive segment and in the Americas within the HDE segment. In addition, the Company eliminated the Vice President, CIS and Chief Operating Officer senior executive position and, as a result, recorded of severance-related expenses. These headcount reductions support the Company’s objective of reducing operational and SG&A cost structures. Also during fiscal the Company transferred production from its manufacturing facility in Zhongshan, China to another CIS segment manufacturing facility in China. As a result of this plant consolidation, the Company recorded of severance expenses during fiscal The Company is also in the process of transferring product lines to its CIS manufacturing facility in Mexico. These plant consolidation activities support the Company’s objective of achieving operational improvements and organizational efficiencies. During fiscal and restructuring actions consisted primarily of targeted headcount reductions and plant consolidation activities. The headcount reductions were primarily in Europe within the Automotive segment and in the Americas within the HDE segment. The plant consolidation activities included transferring product lines to the Company’s CIS manufacturing facility in Mexico. Restructuring and repositioning expenses were as follows: Years ended March 31, 2021 2020 2019 Employee severance and related benefits $ 11.7 $ 10.2 $ 8.7 Other restructuring and repositioning expenses 1.7 2.0 0.9 Total $ 13.4 $ 12.2 $ 9.6 Other restructuring and repositioning expenses primarily consist of equipment transfer and plant consolidation costs. The Company accrues severance in accordance with its written plans, procedures, and relevant statutory requirements. Changes in accrued severance were as follows: Years ended March 31, 2021 2020 Beginning balance $ 5.0 $ 10.0 Additions 11.7 10.2 Payments (10.5 ) (15.1 ) Reclassified as held for sale (2.5 ) - Effect of exchange rate changes 0.3 (0.1 ) Ending balance $ 4.0 $ 5.0 During fiscal the Company recorded asset impairment charges totaling within its Automotive segment. See Note for additional information. During fiscal the Company recorded asset impairment charges totaling within its Automotive segment to write down property and equipment assets in Austria and Germany to estimated fair value. Also during fiscal the Company recorded a impairment charge to reduce the carrying value of the previously-closed CIS Austrian facility to its estimated fair value, less costs to sell. During fiscal the Company recorded asset impairment charges of related to this closed facility.

Other Income and Expense

Other Income and Expense	12 Months Ended
	Mar. 31, 2021
Other Income and Expense [Abstract]
Other Income and Expense	Note : Other Income and Expense Other income and expense consisted of the following: Years ended March 31, 2021 2020 2019 Interest income $ 0.5 $ 0.4 $ 0.4 Foreign currency transactions (a) 0.6 (2.4 ) (2.3 ) Net periodic benefit cost (b) (3.3 ) (3.0 ) (2.9 ) Equity in earnings of non-consolidated affiliate (c) - 0.2 0.7 Total other expense - net $ (2.2 ) $ (4.8 ) $ (4.1 ) (a) Foreign currency transactions primarily consist of foreign currency transaction gains and losses on the re-measurement or settlement of foreign currency-denominated assets and liabilities, including intercompany loans and transactions denominated in a foreign currency, along with gains and losses on foreign currency exchange contracts. (b) Net periodic benefit cost for the Company’s pension and postretirement plans is exclusive of service cost . (c) During fiscal 2020, the Company sold its ownership interest in Nikkei Heat Exchanger Company, Ltd. As a result of the sale, the Company recorded a gain of $ 0.1 million , which is included within the fiscal 2020 amount. See Note 1 for additional information.

Income Taxes

Income Taxes	12 Months Ended
	Mar. 31, 2021
Income Taxes [Abstract]
Income Taxes	Note 8: Income Taxes The U.S. and foreign components of loss or earnings before income taxes and the provision or benefit for income taxes consisted of the following: Years ended March 31, 2021 2020 2019 Components of (loss) earnings before income taxes: United States $ (48.7 ) $ (26.1 ) $ 22.4 Foreign (70.6 ) 36.5 58.4 Total (loss) earnings before income taxes $ (119.3 ) $ 10.4 $ 80.8 Income tax provision (benefit): Federal: Current $ (0.1 ) $ (3.4 ) $ (20.4 ) Deferred 58.3 (1.7 ) (4.2 ) State: Current 0.4 (0.1 ) 0.7 Deferred 9.2 (2.3 ) 1.9 Foreign: Current 22.0 14.9 19.0 Deferred 0.4 5.0 (2.1 ) Total income tax provision (benefit) $ 90.2 $ 12.4 $ (5.1 ) On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Act. The Tax Act included a new provision designed to tax global intangible low taxed income (“GILTI”) starting in fiscal 2019. The Company elected to record the tax effects of the GILTI provision as a period expense in the applicable tax year. To determine whether its net operating loss carryforward deferred tax assets are expected to be realized, the Company considers the applicable tax law ordering. Based upon this approach, net operating loss carryforwards are deemed to be realizable if they will reduce the expected tax liability when utilized, regardless of whether the 50% GILTI deduction or applicable tax credits may have been available. The Company’s accounting policy is to allocate the income tax provision between net earnings and other comprehensive income. The Company applies its accounting for income taxes by tax jurisdiction, and in periods in which there is a loss before income taxes and pre-tax income in other comprehensive income, it first allocates the income tax provision to other comprehensive income, and then records a related tax benefit in the income tax provision. The reconciliation between the U.S. federal statutory rate and the Company’s effective tax rate was as follows: Years ended March 31, 2021 2020 2019 Statutory federal tax 21.0 % 21.0 % 21.0 % State taxes, net of federal benefit 0.9 (12.0 ) 3.6 Taxes on non-U.S. earnings and losses (9.1 ) 32.9 3.9 Valuation allowances (92.9 ) 156.9 4.0 Tax credits 2.2 (36.7 ) (26.1 ) Compensation (1.3 ) 4.0 (0.1 ) Tax rate or law changes (0.2 ) 3.6 (12.0 ) Uncertain tax positions, net of settlements 0.1 (37.9 ) 0.4 Notional interest deductions 1.3 (12.5 ) (2.5 ) Dividends and taxable foreign inclusions 3.0 (11.0 ) 1.6 Other (0.6 ) 10.9 (0.1 ) Effective tax rate (75.6 %) 119.2 % (6.3 %) During fiscal 2021, the Company’s effective tax rate was largely driven by both significant impairment charges and income tax charges related to valuation allowances. See Note 2 for information regarding the impairment charges recorded during fiscal 2021. The income tax benefits associated with these impairment charges totaled $24.4 million and $13.3 million in the U.S. and in certain foreign jurisdictions, respectively, and increased the deferred tax assets in the applicable jurisdictions. The deferred tax assets, in turn, were evaluated for realizability, as further described below. The Company records valuation allowances against its net deferred tax assets to the extent it determines it is more likely than not that such assets will not be realized in the future. Each quarter, the Company evaluates the probability that its deferred tax assets will be realized and determines whether valuation allowances or adjustments thereto are needed. This determination involves judgement and the use of significant estimates and assumptions, including expectations of future taxable income and tax planning strategies. In addition, the Company considers the duration of statutory carryforward periods and historical financial results. Based upon its analyses during fiscal 2021, the Company determined it was more likely than not that its deferred tax assets in the U.S. and in certain foreign jurisdictions will not be realized in the future. As a result, the Company recorded income tax charges totaling $116.5 million to increase the valuation allowance on deferred tax assets in the U.S. ($103.3 million) and in certain foreign jurisdictions ($13.2 million). The majority of the U.S. tax charge was recorded in the third quarter of fiscal 2021, which established a full valuation on the U.S. deferred tax assets. The Company’s analyses in the third quarter of fiscal 2021 included consideration of the impairment charges recorded in connection with the pending sale of the liquid-cooled automotive business; see Note 2 for additional information. These impairment charges contributed to the Company entering into a three-year cumulative loss position in the U.S. and in certain foreign jurisdictions as of December 31, 2020. The Company’s analyses as of December 31, 2020 also considered year-to-date taxable income, which had been negatively impacted by the COVID-19 pandemic and lower sales to data center cooling customers, and future projections of taxable income in the relevant jurisdictions. After considering both the positive and negative evidence, the Company determined it is more likely than not that these deferred tax assets will not be realized. Also during fiscal 2021, the Company recorded a net increase of deferred tax asset valuation allowances totaling $22.0 million and recorded a $(9.3) million income tax benefit resulting from the allocation of the income tax provision between net earnings and other comprehensive income, in accordance with the Company’s accounting policy described above. During fiscal 2020, the Company recorded net income tax charges totaling $ million as a result of legal entity restructuring completed in preparation of a potential sale of the liquid-cooled automotive business and a $ million income tax benefit resulting from the recognition of a tax incentive in Italy. Also in fiscal 2020, the Company changed its determination of whether it was more likely than not certain deferred tax assets in the U.S. and in a foreign jurisdiction would be realized and, as a result, adjusted the respective valuation allowances and recorded an income tax charge of $ million and an income tax benefit of $ million, respectively. In addition, the Company recorded a net increase of deferred tax asset valuation allowances totaling $ million and recorded a $ million income tax benefit associated with the reduction in unrecognized tax benefits resulting from a lapse in statutes of limitations and settlements. During fiscal 2019, the Company recorded income tax benefits totaling $14.5 million as a result of amending previous-year tax returns to recognize foreign tax credits that were expected to be realized based upon future sources of income and recorded a $(2.5) million income tax benefit related to a manufacturing deduction in the United States. Shortly after the Tax Act was enacted, the SEC issued accounting guidance which provided a one-year measurement period during which a company could complete its accounting for the impacts of the Tax Act. During fiscal 2019, the Company completed its accounting for the Tax Act, which resulted in an income tax benefit totaling $7.7 million. The Company utilized its deferred tax attributes against the transition tax and finalized its fiscal 2018 U.S. federal income tax return. As a result, the Company decreased the provisional charge recorded for the reduction in the U.S. federal corporate tax rate by $9.3 million, since more deferred tax assets were utilized to offset taxable income at a higher fiscal 2018 U.S. federal corporate tax rate. The Company also decreased the transition tax liability to $18.9 million, a reduction of $0.1 million. In addition, the Company recorded a charge of $1.7 million for a reduction to state deferred tax assets. Also in fiscal 2019, the Company changed its determination of whether it was more likely than not certain deferred tax assets of two separate subsidiaries in a foreign jurisdiction would be realized and, as a result, adjusted the respective valuation allowances and recorded an income tax benefit totaling $1.0 million. In addition, the Company recorded a net increase of deferred tax asset valuation allowances totaling $4.3 million and recorded a $2.2 million income tax benefit associated with the reduction in unrecognized tax benefits resulting from a lapse in statutes of limitations. The Company has recorded valuation allowances against its net deferred tax assets to the extent it has determined it is more likely than not that such assets will not be realized in the future. The Company will maintain the valuation allowances in each applicable tax jurisdiction until it determines it is more likely than not the deferred tax assets will be realized, thereby eliminating the need for a valuation allowance. As further discussed in Note 20, the COVID-19 pandemic has resulted in risks and uncertainties for the Company. Future events or circumstances, such as lower taxable income or unfavorable changes in the financial outlook of the Company’s operations in certain foreign jurisdictions, could necessitate the establishment of further valuation allowances. The tax effects of temporary differences that gave rise to deferred tax assets and liabilities were as follows: March 31, 2021 2020 Deferred tax assets: Accounts receivable $ 0.3 $ 0.3 Inventories 4.5 4.5 Plant and equipment 7.5 4.7 Lease liabilities 14.0 15.7 Pension and employee benefits 24.0 45.1 Net operating and capital losses 52.7 70.2 Credit carryforwards 51.8 56.8 Other, principally accrued liabilities 8.9 8.1 Total gross deferred tax assets 163.7 205.4 Less: valuation allowances (90.7 ) (46.9 ) Net deferred tax assets 73.0 158.5 Deferred tax liabilities: Plant and equipment 9.8 13.1 Lease assets 13.8 15.6 Goodwill 5.1 4.8 Intangible assets 25.1 26.4 Other 0.6 1.9 Total gross deferred tax liabilities 54.4 61.8 Net deferred tax assets $ 18.6 $ 96.7 At March 31, 2021, the net deferred tax assets presented in the table above exclude deferred tax assets and liabilities classified as held for sale. At March 31, 2021, the Company recorded a full valuation allowance for the net deferred tax assets of the held for sale businesses. See Note 2 for additional information regarding the businesses held for sale. Unrecognized tax benefits were as follows: Years ended March 31, 2021 2020 Beginning balance $ 9.7 $ 13.8 Gross increases - tax positions in prior period 0.1 0.3 Gross decreases - tax positions in prior period (0.6 ) (1.0 ) Gross increases - tax positions in current period 0.9 1.1 Settlements - (2.1 ) Lapse of statute of limitations (0.5 ) (2.4 ) Ending balance $ 9.6 $ 9.7 The Company’s liability for unrecognized tax benefits as of March 31, 2021 was $9.6 million and, if recognized, $1.5 million would have an effective tax rate impact. The Company estimates a $2.4 million decrease in unrecognized tax benefits during fiscal 2022 due to lapses in statutes of limitations and settlements. If recognized, these reductions would not have a significant impact on the Company’s effective tax rate. The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income tax expense. During fiscal 2021 and 2020, interest and penalties included within income tax expense were not significant. At March 31, 2021 and 2020, accrued interest and penalties totaled $0.6 million and $0.5 million, respectively. The Company files income tax returns in multiple jurisdictions and is subject to examination by taxing authorities throughout the world. At March 31, 2021, the Company was under income tax examination in a number of jurisdictions. The following tax years remain subject to examination for the Company’s major tax jurisdictions: Germany Fiscal 2015 - Fiscal 2020 Italy Fiscal 2016 - Fiscal 2020 United States Fiscal 2017 - Fiscal 2020 At March 31, 2021, the Company had federal and state tax credits of $60.5 million that, if not utilized against U.S. taxes, will expire between fiscal 2022 2041 2022 2041 2022 2034 The Company’s practice and intention is to reinvest, with certain insignificant exceptions, the earnings of its non-U.S. subsidiaries outside of the U.S., and therefore, the Company has not recorded foreign withholding taxes or deferred income taxes for these earnings. The Company has estimated the net amount of unrecognized foreign withholding tax and deferred tax liabilities would total approximately $10.0 million if the accumulated foreign earnings were distributed; however, the actual tax cost would be dependent on circumstances existing when remittance occurs.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share	Note 9: Earnings Per Share The components of basic and diluted earnings per share were as follows: Years ended March 31, 2021 2020 2019 Basic Earnings Per Share: Net (loss) earnings attributable to Modine $ (210.7 ) $ (2.2 ) $ 84.8 Less: Undistributed earnings attributable to unvested shares - - (0.4 ) Net (loss) earnings available to Modine shareholders $ (210.7 ) $ (2.2 ) $ 84.4 Weighted-average shares outstanding - basic 51.3 50.8 50.5 Net (loss) earnings per share - basic $ (4.11 ) $ (0.04 ) $ 1.67 Diluted Earnings Per Share: Net (loss) earnings attributable to Modine $ (210.7 ) $ (2.2 ) $ 84.8 Less: Undistributed earnings attributable to unvested shares - - (0.2 ) Net (loss) earnings available to Modine shareholders $ (210.7 ) $ (2.2 ) $ 84.6 Weighted-average shares outstanding - basic 51.3 50.8 50.5 Effect of dilutive securities - - 0.8 Weighted-average shares outstanding - diluted 51.3 50.8 51.3 Net (loss) earnings per share - diluted $ (4.11 ) $ (0.04 ) $ 1.65 For fiscal 2021, 2020 and 2019, the calculation of diluted earnings per share excluded 1.0 million, 1.1 million, and 0.4 million stock options, respectively, because they were anti-dilutive. For fiscal 2021, 2020 and 2019, the calculation of diluted earnings per share excluded 0.4 million, 0.5 million, and 0.3 million restricted stock awards, respectively, because they were anti-dilutive. For fiscal 2021 and 2020, the total number of potentially-dilutive securities was 0.2 million and 0.3 million, respectively. However, these securities were not included in the computation of diluted net loss per share since to do so would have decreased the loss per share.

Cash, Cash Equivalents and Rest

Cash, Cash Equivalents and Restricted Cash	12 Months Ended
	Mar. 31, 2021
Cash, Cash Equivalents and Restricted Cash [Abstract]
Cash, Cash Equivalents and Restricted Cash	Note 10: Cash, Cash Equivalents and Restricted Cash Cash, cash equivalents and restricted cash consisted of the following: March 31, 2021 2020 Cash and cash equivalents $ 37.8 $ 70.9 Restricted cash 0.1 0.4 Cash and restricted cash held for sale 8.2 - Total cash, cash equivalents, restricted cash and cash held for sale $ 46.1 $ 71.3 Restricted cash, which is reported within other current assets and other noncurrent assets in the consolidated balance sheets, consists primarily of deposits for contractual guarantees or commitments required for rents, import and export duties, and commercial agreements.

Inventories

Inventories	12 Months Ended
	Mar. 31, 2021
Inventories [Abstract]
Inventories	Note 11: Inventories Inventories consisted of the following: March 31, 2021 2020 Raw materials $ 117.1 $ 123.6 Work in process 38.5 34.6 Finished goods 40.0 49.2 Total inventories $ 195.6 $ 207.4 At March 31, 2021, inventories excluded amounts classified as held for sale. See Note 2 for additional information.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Mar. 31, 2021
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Note 12: Property, Plant and Equipment Property, plant and equipment, including depreciable lives, consisted of the following: March 31, 2021 2020 Land $ 16.4 $ 19.7 Buildings and improvements ( 10 40 203.5 276.7 Machinery and equipment ( 3 15 623.2 870.3 Office equipment ( 3 10 81.3 95.2 Construction in progress 19.0 40.5 943.4 1,302.4 Less: accumulated depreciation (673.5 ) (854.4 ) Net property, plant and equipment $ 269.9 $ 448.0 At March 31, 2021, property, plant and equipment excluded amounts classified as held for sale. In addition, upon classifying the liquid- and air-cooled automotive businesses as held for sale, the Company ceased depreciating the property, plant and equipment within the disposal groups. See Note 2 for additional information. Depreciation expense totaled $60.1 million, $68.2 million, and $67.9 million for fiscal 2021, 2020, and 2019, respectively. Gains and losses related to the disposal of property, plant and equipment are recorded within SG&A expenses. For fiscal 2021, 2020, and 2019, losses related to the disposal of property, plant and equipment totaled $0.7 million, $0.6 million, and $0.9 million, respectively.

Intangible Assets

Intangible Assets	12 Months Ended
	Mar. 31, 2021
Intangible Assets [Abstract]
Intangible Assets	Note 13: Intangible Assets Intangible assets consisted of the following: March 31, 2021 March 31, 2020 Gross Carrying Value Accumulated Amortization Net Intangible Assets Gross Carrying Value Accumulated Amortization Net Intangible Assets Customer relationships $ 62.8 $ (16.9 ) $ 45.9 $ 60.8 $ (12.6 ) $ 48.2 Trade names 51.5 (11.4 ) 40.1 58.3 (16.2 ) 42.1 Acquired technology 23.9 (9.3 ) 14.6 23.6 (7.6 ) 16.0 Total intangible assets $ 138.2 $ (37.6 ) $ 100.6 $ 142.7 $ (36.4 ) $ 106.3 The Company recorded $8.5 million, $8.9 million, and $9.0 million of amortization expense during fiscal 2021, 2020, and 2019, respectively. The Company estimates that it will record $8.4 million of amortization expense in fiscal 2022 and approximately $8.0 million of annual amortization expense in fiscal 2023 through 2026.

Goodwill

Goodwill	12 Months Ended
	Mar. 31, 2021
Goodwill [Abstract]
Goodwill	Note 14: Goodwill Changes in the carrying amount of goodwill, by segment and in the aggregate, were as follows: BHVAC CIS Automotive Total Balance, March 31, 2019 $ 14.1 $ 153.9 $ 0.5 $ 168.5 Impairment charge - - (0.5 ) (0.5 ) Effect of exchange rate changes (0.6 ) (1.3 ) - (1.9 ) Balance, March 31, 2020 13.5 152.6 - 166.1 Effect of exchange rate changes 1.3 3.3 - 4.6 Balance, March 31, 2021 $ 14.8 $ 155.9 $ - $ 170.7 The Company tests goodwill for impairment annually, as of March 31, or more frequently if events or circumstances change that would, more likely than not, reduce the fair value of a reporting unit below its carrying value. To test goodwill for impairment, the Company determines the fair value of each reporting unit based upon the present value of estimated future cash flows and compares the fair value of each reporting unit with its carrying value. The Company’s determination of fair value involves judgment and the use of significant estimates and assumptions, including assumptions regarding the revenue growth rates and operating profit margins used to calculate estimated future cash flows, risk-adjusted discount rates, business trends and market conditions. As a result of its annual goodwill impairment tests performed as of March 31, 2021, the Company determined that the fair value of each of the reporting units within its BHVAC and CIS segments exceeded their respective book values. In fiscal 2020, the Company determined that the goodwill recorded within its Automotive segment was fully impaired and recorded a $0.5 million impairment charge as a result. At both March 31, 2021 and 2020, accumulated goodwill impairment losses totaled $31.6 million a nd $ million, within the HDE and Automotive segments, respectively.

Product Warranties and Other Co

Product Warranties and Other Commitments	12 Months Ended
	Mar. 31, 2021
Product Warranties and Other Commitments [Abstract]
Product Warranties and Other Commitments	Note 15: Product Warranties and Other Commitments Product Warranties Many of the Company’s products are covered under a warranty period ranging from one to five years . The Company records a liability for product warranty obligations at the time of sale and adjusts its warranty accruals if it becomes probable that expected claims will differ from previous estimates. Changes in accrued warranty costs were as follows: Years ended March 31 , 2021 2020 Beginning balance $ 7.9 $ 9.2 Warranties recorded at time of sale 5.5 5.3 Adjustments to pre-existing warranties (0.9 ) (1.6 ) Settlements (5.6 ) (4.8 ) Reclassified as held for sale (2.0 ) - Effect of exchange rate changes 0.3 (0.2 ) Ending balance $ 5.2 $ 7.9 Indemnification Agreements From time to time, the Company provides indemnification agreements related to the sale or purchase of an entity or facility. These indemnification agreements cover customary representations and warranties typically provided in conjunction with such transactions, including income, sales, excise or other tax matters, environmental matters and other third-party claims. The indemnification periods provided generally range from less than one year to fifteen years. In addition, standard indemnification provisions reside in many commercial agreements to which the Company is a party and relate to responsibility in the event of potential third-party claims. The fair value of the Company’s outstanding indemnification obligations at March 31, 2021 was not material. Commitments At March 31, 2021, the Company had capital expenditure commitments of $ million, Significant commitments include tooling and equipment expenditures for new and renewal programs with vehicular customers. The Company utilizes inventory arrangements with certain vendors in the normal course of business under which the vendors maintain inventory stock at the Company’s facilities or at outside facilities. Title passes to the Company at the time goods are withdrawn for use in production. The Company has agreements with the vendors to use the material within a specific period of time. In some cases, the Company bears the risk of loss for the inventory because Modine is required to insure the inventory against damage and/or theft. This inventory is included within the Company’s consolidated balance sheets as raw materials inventory.

Leases

Leases	12 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Leases	Note 16: Leases Effective April 1, 2019, the Company adopted new lease accounting guidance see Note 1 for additional information. The Company determines if an arrangement is a lease at contract inception. The lease term begins upon lease commencement, which is when the Company takes possession of the asset, and may include options to extend or terminate the lease when it is reasonably certain that such options will be exercised. The Company uses the lease term within its determination of the appropriate lease classification, either as an operating lease or as a finance lease, and to calculate straight-line lease expense for its operating leases. ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. The Company recognizes ROU assets and lease liabilities at the lease commencement date, based upon the present value of lease payments over the lease term. As its lease agreements typically do not provide an implicit interest rate, the Company primarily uses an incremental borrowing rate to calculate the ROU asset and lease liability. In determining the incremental borrowing rate, the Company considers its current collateralized borrowing rate, the term of the lease, and the economic environment where the lease activity is concentrated. The Company believes this method effectively estimates a borrowing rate that it could obtain for a debt instrument with similar terms as the lease agreement. Based upon its accounting policy, the Company does not separate lease and non-lease components for any asset class. In addition, the Company does not record short-term leases (i.e. leases with an initial term of 12 months or less) on its consolidated balance sheets. Certain leases require the Company to pay taxes, insurance, maintenance, and other operating expenses associated with the leased asset. Such amounts are not included in the measurement of the lease liability to the extent they are variable in nature. These variable lease costs are recognized as variable lease expense when incurred. The depreciable life of the ROU assets and related leasehold improvements are limited by the expected lease term, unless the lease contains a provision to transfer title to the Company or a purchase option that the Company expects to execute. The Company’s most significant leases represent leases of real estate, such as manufacturing facilities, warehouses, and offices. In addition, the Company leases manufacturing and IT equipment and vehicles. The Company’s most significant leases have remaining lease terms of 1 to 13 years. Certain leases contain renewal options for varying periods, which are at the Company’s discretion. If reasonably certain of exercise, the Company includes the renewal periods within the calculation of ROU assets and lease liabilities. The Company’s lease agreements do not contain material residual value guarantees or material restrictive covenants. Lease Assets and Liabilities The following table provides a summary of leases recorded on the consolidated balance sheets. The March 31, 2021 amounts exclude operating lease ROU assets and liabilities, which each totaled $ million, that are classified as held for sale on the Company’s consolidated balance sheet; see Note 2 for additional information. - Balance Sheet Location - March 31, 2021 March 31, 2020 Lease Assets Operating lease ROU assets Other noncurrent assets $ 54.1 $ 61.4 Finance lease ROU assets (a) Property, plant and equipment - net 8.3 8.5 Lease Liabilities Operating lease liabilities Other current liabilities $ 11.2 $ 10.9 Operating lease liabilities Other noncurrent liabilities 44.8 50.3 Finance lease liabilities Long-term debt - current portion 0.4 0.4 Finance lease liabilities Long-term debt 3.2 3.3 (a) Finance lease ROU assets were recorded net of accumulated amortization of $2.4 million and $1.8 million as of March 31, 2021 and 2020, respectively. Components of Lease Expense The Company records operating lease expense as either cost of sales or SG&A expenses within its consolidated statements of operations, depending upon the nature and use of the ROU assets. The Company records finance lease expense as depreciation expense within cost of sales or SG&A expenses, depending upon the nature and use of the ROU assets, and as interest expense in its consolidated statements of operations. The components of lease expense were as follows: Years ended March 31, 2021 2020 Operating lease expense (a) $ 19.5 $ 21.2 Finance lease expense: Depreciation of ROU assets 0.5 0.5 Interest on lease liabilities 0.2 0.2 Total lease expense $ 20.2 $ 21.9 (a) In fiscal 2021 and 2020, operating lease expense included short-term lease expense of $3.5 million and $4.1 million, respectively. Variable lease expense was not significant. Supplemental Cash Flow Information Years ended March 31, 2021 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 14.2 $ 14.7 Financing cash flows for finance leases 0.6 0.5 ROU assets obtained in exchange for lease liabilities Operating leases $ 9.8 $ 9.0 Finance leases 0.1 0.2 Lease Term and Discount Rates March 31, 2021 March 31, 2020 Weighted-average remaining lease term: Operating leases 6.9 years 9.3 years Finance leases 7.8 years 8.8 years Weighted-average discount rate: Operating leases 3.3 % 3.5 % Finance leases 4.7 % 4.7 % Maturity of Lease Liabilities Future minimum rental payments for leases with initial non-cancellable lease terms in excess of one year were as follows at March 31, 2021: Fiscal Year Operating Leases Finance Leases 2022 $ 12.8 $ 0.6 2023 10.9 0.6 2024 8.1 0.6 2025 6.7 0.6 2026 6.1 0.5 2027 18.5 1.4 Total lease payments 63.1 4.3 Less: Interest (7.1 ) (0.7 ) Present value of lease liabilities $ 56.0 $ 3.6 The future minimum rental payments summarized above exclude payments for lease liabilities held for sale.

Indebtedness

Indebtedness	12 Months Ended
	Mar. 31, 2021
Indebtedness [Abstract]
Indebtedness	Note 17: Indebtedness Long-term debt consisted of the following: io _ Fiscal year of maturity _ March 31, 2021 March 31, 2020 Term loans _ 2025 _ $ $178.9 $ $189.4 Revolving credit facility 2025 4.8 127.2 5.9 2029 100.0 100.0 5.8 2027 50.0 50.0 Other (a) 3.6 6.0 337.3 472.6 Less: current portion (21.9) (15.6) Less: unamortized debt issuance costs (4.2) (5.0) Total long-term debt $ $311.2 $ $452.0 (a) Other long-term debt primarily includes finance lease obligations and borrowings by foreign subsidiarie Long-term debt matures as follows: Fiscal Year 2022 $ 21.9 2023 21.9 2024 21.9 2025 153.2 2026 33.8 2027 84.6 Total $ 337.3 The Company maintains a credit agreement with a syndicate of banks that provides for a multi-currency $ million revolving credit facility expiring in . In addition, this credit agreement provides for both U.S. dollar- and euro-denominated term loan facilities, with repayments continuing into fiscal 2025, and shorter-duration swingline loans. Borrowings under the revolving credit, swingline and term loan facilities bear interest at a variable rate, based upon the applicable reference rate and including a margin percentage dependent upon the Company’s leverage ratio, as described below. At March 31, 2021, the weighted-average interest rates for these variable-rate borrowings was percent. Based upon the terms of the credit agreement, the Company classifies borrowings under its revolving credit and swingline facilities as long-term and short-term debt, respectively, on its consolidated balance sheets. At March 31, 2021, the Company’s borrowings under its revolving credit and swingline facilities totaled $ million and $ million, respectively, and domestic letters of credit totaled $ million. As a result, available borrowing capacity under the Company’s revolving credit facility was $ million as of March 31, 2021. The The of outstanding short-term borrowings related to these foreign credit agreements at March 31, 2021 were classified as held for sale; see Note 2 for additional information on businesses held for sale. The outstanding short-term borrowings at March 31, 2020 totaled Provisions in the Company’s credit agreement, Senior Note agreements, and various foreign credit agreements require the Company to maintain compliance with various covenants and include certain cross-default clauses. Under its primary credit agreements in the U.S., the Company has provided liens on substantially all domestic assets. Also, as specified in the credit agreement, the term loans may require prepayments in the event of certain asset sales. In addition, at the time of each incremental borrowing under the revolving credit facility, the Company is required to represent to the lenders that there has been no material adverse effect, as defined in the credit agreement, on its business, property, or results of operations. In May 2020 and in response to risks and uncertainties introduced by the COVID-19 pandemic, the Company executed amendments to its primary credit agreements in the U.S. to provide additional financial covenant flexibility. The amendments temporarily raised the leverage ratio covenant limit during fiscal 2021 and 2022. In May 2021, based upon its outlook for fiscal 2022, the Company determined that such financial covenant flexibility was no longer necessary and amended the primary agreements. The May 2021 amendments reinstated the to 1 leverage ratio covenant limit. The leverage ratio covenant requires the Company to limit the ratio of its consolidated indebtedness, less a portion of its cash balance, both as defined by the credit agreements, to its consolidated net earnings before interest, taxes, depreciation, amortization, and certain other adjustments (“Adjusted EBITDA”). The leverage ratio covenant limit for the fourth quarter of fiscal 2021 was 5.75 to 1. The Company is also subject to an interest expense coverage ratio covenant, which requires the Company to maintain Adjusted EBITDA of at least three times consolidated interest expense. As of March 31, 2021, the Company was in compliance with its debt covenants ; its leverage ratio and interest coverage ratio were and , respectively. The Company estimates the fair value of long-term debt using discounted future cash flows at rates offered to the Company for similar debt instruments of comparable maturities. As of March 31, 2021 and 2020, the carrying value of the Company’s long-term debt approximated fair value, with the exception of the Senior Notes, which had an aggregate fair value of approximately $146.0 million and $131.3 million, respectively. The fair value of the Company’s long-term debt is categorized as Level 2 within the fair value hierarchy. Refer to Note 4 for the definition of a Level 2 fair value measurement.

Pension and Employee Benefit Pl

Pension and Employee Benefit Plans	12 Months Ended
	Mar. 31, 2021
Pension and Employee Benefit Plans [Abstract]
Pension and Employee Benefit Plans	Note 18: Pension and Employee Benefit Plans Defined Contribution Employee Benefit Plans The Company maintains a domestic 401(k) plan that allows employees to contribute a portion of their salary to help them save for retirement. The Company currently matches employee contributions up to 4.5 percent of their compensation. During fiscal 2021, as part of its response to the negative impacts of the COVID-19 pandemic, the Company suspended matching employee contributions for part of the year. The Company’s expense for defined contribution employee benefit plans during fiscal 2021, 2020, and 2019 was $3.0 million, $6.6 million, and $6.4 million, respectively. In addition, the Company maintains non-qualified deferred compensation plans for eligible employees, and various non-U.S. subsidiaries have government-required defined contribution plans in place, under which they contribute a percentage of employee earnings into accounts, consistent with local laws. Statutory Termination Plans Certain non-U.S. subsidiaries have statutory termination indemnity plans covering eligible employees. The benefits under these plans are based upon years of service and final average compensation levels or a monthly retirement benefit amount. These programs are substantially unfunded in accordance with local laws. Pension Plans The Company maintains non-contributory defined benefit pension plans that cover eligible domestic employees. These plans are closed to new participants. The primary domestic plans cover most domestic employees hired on or before December 31, 2003 and provide benefits based primarily upon years of service and average compensation for salaried and some hourly employees. Benefits for other hourly employees are based upon a monthly retirement benefit amount. Currently, the Company’s domestic pension plans do not include increases in annual earnings or future service in calculating the average annual earnings and years of credited service under the pension plan benefit formula. Certain non-U.S. subsidiaries of the Company also have legacy defined benefit plans which cover a smaller number of active employees and are substantially unfunded. The primary non-U.S. plans are maintained in Germany, Austria, and Italy and are closed to new participants. Liabilities associated with pension plans maintained in Austria and Germany have been classified as liabilities held for sale on the March 31, 2021 consolidated balance sheet since the pension plans will convey to the buyers of the Company’s liquid- and air-cooled automotive businesses. The held for sale pension liabilities totaled $17.8 million as of March 31, 2021. See Note 2 for additional information. The Company contributed $19.3 million, $3.5 million, and $8.0 million to its U.S. pension plans during fiscal 2021, 2020, and 2019, respectively. In addition, the Company contributed $2.2 million, $2.3 million, and $5.9 million to its non-U.S. pension plans during fiscal 2021, 2020, and 2019, respectively. These contributions are reported in the change in other liabilities in the consolidated statements of cash flows. Postretirement Plans The Company provides selected healthcare and life insurance benefits for eligible retired domestic employees. The Company periodically amends these unfunded plans to change the contribution rate of retirees and the amounts and forms of coverage. An annual limit on the Company’s cost is defined for the majority of these plans. The Company’s net periodic income for its postretirement plans in each of fiscal 2021, 2020, and 2019 was $0.3 million. Measurement Date The Company uses March 31 as the measurement date for its pension and postretirement plans. Changes in benefit obligations and plan assets, as well as the funded status of the Company’s global pension plans, were as follows: Years ended March 31, 2021 2020 Change in benefit obligation: Benefit obligation at beginning of year $ 264.7 $ 258.8 Service cost 0.4 0.4 Interest cost 7.9 9.1 Actuarial loss 2.7 15.5 Benefits paid (17.1 ) (18.2 ) Curtailment gains (a) (0.1 ) (0.3 ) Effect of exchange rate changes 2.1 (0.6 ) Benefit obligation at end of year $ 260.6 $ 264.7 Change in plan assets: Fair value of plan assets at beginning of year $ 131.1 $ 155.1 Actual return on plan assets 47.8 (11.6 ) Benefits paid (17.1 ) (18.2 ) Employer contributions 21.5 5.8 Fair value of plan assets at end of year $ 183.3 $ 131.1 Funded status at end of year $ (77.3 ) $ (133.6 ) Amounts recognized in the consolidated balance sheets: Current liability $ (0.9 ) $ (2.7 ) Noncurrent liability (58.6 ) (130.9 ) Liabilities held for sale (17.8 ) - $ (77.3 ) $ (133.6 ) (a) The curtailment gains in fiscal 2021 and 2020 are associated with headcount reductions in Europe within the Automotive segment. The Company recognizes curtailment gains as a component of net periodic benefit cost in the period headcount reductions occur. See Note 6 for additional information on the Company’s restructuring activities. As of March 31, 2021, 2020, and 2019, the benefit obligation associated with the Company’s non-U.S. pension plans totaled $36.4 million, $35.7 million, and $36.5 million respectively. The $0.7 million increase in the benefit obligation associated with non-U.S. pension plans as of March 31, 2021, compared with the prior year, was primarily due to a $2.2 million impact of foreign currency exchange rate changes and service and interest cost totaling $0.7 million, partially offset by employer contributions of $2.2 million for benefits paid to plan participants during the year. In fiscal 2020, the $0.8 million decrease primarily resulted from employer contributions of $2.2 million for benefits paid to plan participants during the year, partially offset by service and interest cost totaling $0.9 million. The accumulated benefit obligation for pension plans was $258.9 million and $263.1 million as of March 31, 2021 and 2020, respectively. The net actuarial loss related to the pension plans recognized in accumulated other comprehensive loss was $151.1 million and $191.5 million as of March 31, 2021 and 2020, respectively. Costs for the Company’s global pension plans included the following components: Years ended March 31, 2021 2020 2019 Components of net periodic benefit cost: Service cost $ 0.4 $ 0.4 $ 0.5 Interest cost 7.9 9.1 9.6 Expected return on plan assets (11.5 ) (12.0 ) (12.3 ) Amortization of net actuarial loss 6.9 6.0 5.6 Settlements (a) 0.2 0.2 0.2 Net periodic benefit cost $ 3.9 $ 3.7 $ 3.6 Other changes in benefit obligation recognized in other comprehensive income (loss): Net actuarial gain (loss) $ 33.8 $ (38.7 ) $ (7.7 ) Amortization of net actuarial loss 7.1 6.2 5.8 Total recognized in other comprehensive income (loss) $ 40.9 $ (32.5 ) $ (1.9 ) (a) The settlement charges resulted from activity associated with the Company’s non-U.S. pension plans. The Company amortized $7.1 million, $6.2 million, and $5.6 million of net actuarial loss in fiscal 2021, 2020, and 2019, respectively. In each of these years, less than $1.0 million of the amortization was attributable to the Company’s non-U.S. pension plans. The Company estimates $6.6 million of net actuarial loss for its pension plans will be amortized from accumulated other comprehensive loss into net periodic benefit cost during fiscal 2022. The fiscal 2022 estimated amortization includes less than $1.0 million related to the Company’s non-U.S. pension plans. In addition, the Company expects to recognize approximately $7.0 million of net actuarial losses in fiscal 2022 as part of the anticipated losses to be recorded upon sale of the liquid- and air-cooled automotive businesses. The Company used a discount rate of 3.2% and 3.4% as of March 31, 2021 and 2020, respectively, for determining its benefit obligations under its U.S. pension plans. The Company used a weighted-average discount rate of 1.0% as of both March 31, 2021 and 2020, respectively, for determining its benefit obligations under its non-U.S. pension plans. The Company used a discount rate of 3.4%, 4.0%, and 4.0% to determine its costs under its U.S. pension plans for fiscal 2021, 2020, and 2019, respectively. The Company used a weighted-average discount rate of 1.4%, 1.7%, and 1.9% to determine its costs under its non-U.S. pension plans for fiscal 2021, 2020, and 2019, respectively. The Company determined the discount rates used for its U.S. pension plans by modeling a portfolio of high-quality corporate bonds, with appropriate consideration given to expected defined benefit payment terms and duration of the respective pension obligations. The Company used a similar process to determine the discount rate for its non-U.S. pension obligations. Plan assets in the Company’s U.S. pension plans comprise 100 percent of the Company’s world-wide pension plan assets. The Company’s U.S. pension plan weighted-average asset allocations at the measurement dates of March 31, 2021 and 2020 were as follows: March 31, 2021 March 31, 2020 Target allocation Plan assets Target allocation Plan assets Equity securities 76 % 73 % 65 % 60 % Debt securities 18 % 17 % 21 % 22 % Real estate investments 5 % 9 % 13 % 16 % Cash and cash equivalents 1 % 1 % 1 % 2 % 100 % 100 % 100 % 100 % Due to market conditions and other factors, including timing of benefit payments and other transactions, actual asset allocation may vary from the target allocation outlined above. The Company periodically rebalances the assets to the target allocations. As of March 31, 2021 and 2020, the Company’s pension plans did not directly own shares of Modine common stock. The Company employs a total return investment approach, whereby a mix of investments are used to maximize the long-term growth of principal, while avoiding excessive risk. The Company has established pension plan guidelines based upon an evaluation of market conditions, tolerance for risk and cash requirements for benefit payments. The Company measures and monitors investment risk on an ongoing basis through quarterly investment portfolio reviews, annual liability measurements and periodic asset/liability studies. The expected rate of return on U.S. plan assets is based upon historical return experience and forward-looking return expectations for major asset class categories. For fiscal 2021, 2020, and 2019 U.S. pension plan expense, the expected rate of return on plan assets was 7.5 percent. For fiscal 2022 U.S. pension plan expense, the Company has assumed a rate of return on plan assets of 7.5 percent. The Company’s funding policy for its U.S. pension plans is to contribute annually, at a minimum, the amount necessary on an actuarial basis to provide for benefits in accordance with applicable laws and regulations. The Company expects to contribute approximately $13.0 million to its U.S. plans during fiscal 2022. Estimated pension benefit payments, excluding payments for pension liabilities held for sale, for the next ten fiscal years are as follows: Fiscal Year Estimated Pension Benefit Payments 2022 $ 15.2 2023 15.5 2024 15.6 2025 15.6 2026 15.5 2027 2031 74.6

Derivative Instruments

Derivative Instruments	12 Months Ended
	Mar. 31, 2021
Derivative Instruments [Abstract]
Derivative Instruments	Note 19: Derivative Instruments The Company uses derivative financial instruments from time to time as a tool to manage certain financial risks. The Company’s policy prohibits the use of leveraged derivatives. Accounting for derivatives and hedging activities requires derivative financial instruments to be measured at fair value and recognized as assets or liabilities in the consolidated balance sheets. Accounting for the gain or loss resulting from the change in fair value of the derivative financial instruments depends on whether it has been designated as a hedge, and, if so, on the nature of the hedging activity. Commodity Derivatives The Company periodically enters into over-the-counter forward contracts related to forecasted purchases of aluminum and copper. The Company’s strategy in entering into these contracts is to reduce its exposure to changing market prices of these commodities. The Company designates certain commodity forward contracts as cash flow hedges for accounting purposes. Accordingly, for these designated hedges, the Company records unrealized gains and losses related to the change in the fair value of the contracts in accumulated other comprehensive income (loss) (“AOCI”) within shareholders’ equity and subsequently recognizes the gains and losses within cost of sales as the underlying inventory is sold. Foreign Exchange Contracts The Company’s foreign exchange risk management strategy uses derivative financial instruments to mitigate foreign currency exchange risk. The Company periodically enters into foreign currency forward contracts to hedge specific foreign currency-denominated assets and liabilities as well as forecasted transactions. The Company designates certain hedges of forecasted transactions as cash flow hedges for accounting purposes. Accordingly, for these designated hedges, the Company records unrealized gains and losses related to the change in the fair value of the contracts in AOCI within shareholders’ equity and subsequently recognizes the gains and losses as a component of earnings at the same time and in the same financial statement line that the underlying transactions impact earnings. The Company has not designated forward contracts related to foreign currency-denominated assets and liabilities as hedges. Accordingly, for these non-designated contracts, the Company records unrealized gains and losses related to changes in fair value in other income and expense. Gains and losses on these foreign currency contracts are offset by foreign currency gains and losses associated with the related assets and liabilities. The fair value of the Company’s derivative financial instruments recorded in the consolidated balance sheets were as follows: _ Balance Sheet Location March 31, 2021 March 31, 2020 Derivatives designated as hedges: Commodity derivatives Other current assets $ 0.5 $ - Commodity derivatives Other current liabilities - 1.3 Foreign exchange contracts Other current assets 0.1 0.1 Derivatives not designated as hedges: Foreign exchange contracts Other current liabilities $ - $ - The amounts associated with derivative financial instruments that the Company designated for hedge accounting during the years ended March 31 were as follows: Gain (loss) recognized in other comprehensive income Statement of Operations Gain (loss) reclassified from AOCI 2021 2020 2019 Location 2021 2020 2019 Commodity derivatives $ 2.2 $ (2.6 ) $ (0.3 ) Cost of sales $ - $ (0.8 ) $ (0.4 ) Foreign exchange contracts - (0.1 ) (0.4 ) Net sales - (0.1 ) (0.4 ) Foreign exchange contracts (0.1 ) 0.2 1.0 Cost of sales (0.1 ) 0.4 0.6 Total gains (losses) $ 2.1 $ (2.5 ) $ 0.3 $ (0.1 ) $ (0.5 ) $ (0.2 ) The amounts associated with derivative financial instruments that the Company did not designate for hedge accounting were as follows: _ Years ended March 31, _ Statement of Operations Location 2021 2020 2019 Foreign exchange contracts Net sales $ - $ (0.1 ) $ (0.7 ) Foreign exchange contracts Other income (expense) - net 0.6 (0.1 ) (0.3 ) Total gains (losses) $ 0.6 $ (0.2 ) $ (1.0 )

Risks, Uncertainties, Contingen

Risks, Uncertainties, Contingencies and Litigation	12 Months Ended
	Mar. 31, 2021
Risks, Uncertainties, Contingencies and Litigation [Abstract]
Risks, Uncertainties, Contingencies and Litigation	Note 20: Risks, Uncertainties, Contingencies and Litigation COVID-19 In March 2020, the World Health Organization declared the outbreak of the novel coronavirus, COVID-19, a pandemic. The spread of COVID-19 and the resulting work and travel restrictions, including international border closings, have disrupted, and may continue to disrupt, global supply chains and have negatively impacted the global economy. As a result of this pandemic, the Company experienced significant impacts on its operations. Local government requirements or customer shutdowns caused the Company to suspend production at many of its manufacturing facilities in March and April 2020. All of the temporarily-closed facilities reopened in the first or second quarter of fiscal 2021 and have generally returned to more normal production levels. However, since reopening, production at certain of our plants has been negatively affected at times by employee absences due to COVID-19. The Company is continuing to focus on protecting the health and wellbeing of its employees and the communities in which it operates, while also ensuring the continuity of its business operations and timely delivery of quality products and services to its customers. Beginning largely in April 2020 and to mitigate the negative impacts of COVID-19, the Company took actions including, but not limited to, production staffing adjustments, furloughs, shortened work weeks, and temporary salary reductions at all levels of the organization. While the Company withdrew most of the cost-saving actions in the third quarter of fiscal 2021 as production returned to more normal levels as markets recovered, it remains focused on controlling operating and administrative expenses The Company’s consolidated financial statements reflect estimates and assumptions made by management, including assumptions regarding the future impacts of the COVID-19 pandemic, that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and reported amounts of revenue and expenses during the reporting periods presented. For example, the Company’s goodwill impairment review is particularly sensitive to assumptions that could be adversely impacted by the COVID-19 pandemic. While the Company believes it used appropriate estimates and assumptions to prepare the consolidated financial statements, actual amounts could differ materially and future events or circumstances could have a potential negative effect on the assumptions used. If the Company, its suppliers, or its customers experience further shutdowns or other significant business disruptions associated with the COVID-19 pandemic, its ability to conduct business in the manner and on the timelines presently planned could be materially and negatively impacted, which could have a material adverse effect on the Company’s business, financial position, results of operations and cash flows. Market Risk The Company sells a broad range of products that provide thermal solutions to customers operating in diverse markets, including commercial, industrial, and building HVAC&R markets and vehicular markets, including commercial vehicle, off-highway and automotive and light vehicle. The COVID-19 pandemic negatively impacted many of these markets; while we expect the markets will continue to recover, risk and uncertainties remain present. Credit Risk The Company invests excess cash primarily in investment quality, short-term liquid debt instruments. Financial instruments that potentially subject the Company to significant concentrations of credit risk consist principally of accounts receivable. The Company sells a broad range of products that provide thermal solutions to customers operating throughout the world. In fiscal 2021 and 2020, one vehicular customer accounted for more than ten percent of the Company’s total sales. In fiscal 2019, two vehicular customers each accounted for ten percent or more of the Company’s total sales. Sales to the Company’s top ten customers were 43 percent, 45 percent, and 50 percent of total sales in fiscal 2021, 2020, and 2019, respectively. At March 31, 2021 and 2020, 35 percent and 34 percent, respectively, of the Company’s trade accounts receivable were due from the Company’s top ten customers. These customers operate primarily in the automotive, commercial vehicle, off-highway, data center cooling and commercial air conditioning markets. The Company generally does not require collateral or advanced payments from its customers. The Company has not experienced significant credit losses to customers in the markets served nor has experienced a significant increase in credit losses in connection with the COVID-19 pandemic. The Company manages credit risk through its focus on the following: • Cash and investments – reviewing cash deposits and short-term investments to ensure banks have credit ratings acceptable to the Company and that short-term investments are maintained in secured or guaranteed instruments; • Accounts receivable – performing periodic customer credit evaluations and actively monitoring their financial condition and applicable business news; • Pension assets – ensuring that investments within pension plans provide appropriate diversification, monitoring of investment teams, ensuring that portfolio managers adhere to the Company’s investment policies and directives, and ensuring that exposure to high risk investments is limited; and • Insurance – ensuring that insurance providers maintain financial ratings that are acceptable to the Company. Counterparty Risk The Company manages counterparty risk through its focus on the following: • Customers – performing thorough reviews of customer credit reports and accounts receivable aging reports by internal credit committees; • Suppliers – maintaining a supplier risk management program and utilizing industry sources to identify and mitigate high risk situations; and • Derivatives – ensuring that counterparties to derivative instruments maintain credit ratings that are acceptable to the Company. Environmental The Company has recorded environmental investigation and remediation accruals related to soil and groundwater contamination at manufacturing facilities in the U.S., one of which the Company currently owns and operates, and at its former manufacturing facility in the Netherlands, along with accruals for lesser environmental matters at certain other facilities in the U.S. These accruals generally relate to facilities where past operations followed practices and procedures that were considered acceptable under then-existing regulations, or where the Company is a successor to the obligations of prior owners, and current laws and regulations require investigative and/or remedial work to ensure sufficient environmental compliance. The accruals for these environmental matters totaled $16.0 million and $18.2 million at March 31, 2021 and 2020, respectively. As additional information becomes available, the Company will re-assess the liabilities related to these matters and revise the estimated accruals, if necessary. Based upon currently available information, the Company believes the ultimate outcome of these matters, individually and in the aggregate, will not have a material adverse effect on its financial position. However, these matters are subject to inherent uncertainties, and unfavorable outcomes could occur, including significant monetary damages. Other Litigation In the normal course of business, the Company and its subsidiaries are named as defendants in various lawsuits and enforcement proceedings by private parties, governmental agencies and/or others in which claims are asserted against Modine. The Company believes that any additional loss in excess of amounts already accrued would not have a material effect on the Company’s consolidated balance sheet, results of operations, and cash flows. In addition, management expects that the liabilities which may ultimately result from such lawsuits or proceedings, if any, would not have a material adverse effect on the Company’s financial position.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Mar. 31, 2021
Accumulated Other Comprehensive Loss [Abstract]
Accumulated Other Comprehensive Loss	Note 21: Accumulated Other Comprehensive Loss Changes in accumulated other comprehensive loss were as follows: Foreign Currency Translation Defined Benefit Plans Cash Flow Hedges Total Balance, March 31, 2020 $ (61.4 ) $ (160.9 ) $ (1.0 ) $ (223.3 ) Other comprehensive income before reclassifications 30.4 33.8 2.1 66.3 Reclassifications: Amortization of unrecognized net loss (a) - 6.7 - 6.7 Realized losses - net (b) - - 0.1 0.1 Income taxes - (10.4 ) (0.6 ) (11.0 ) Total other comprehensive income 30.4 30.1 1.6 62.1 Balance, March 31, 2021 $ (31.0 ) $ (130.8 ) $ 0.6 $ (161.2 ) Foreign Currency Translation Defined Benefit Plans Cash Flow Hedges Total Balance, March 31, 2019 $ (42.6 ) $ (136.3 ) $ 0.5 $ (178.4 ) Other comprehensive loss before reclassifications (18.2 ) (38.7 ) (2.5 ) (59.4 ) Reclassifications: Amortization of unrecognized net loss (a) - 5.8 - 5.8 Realized losses - net (b) - - 0.5 0.5 Foreign currency translation gains (c) (0.6 ) - - (0.6 ) Income taxes - 8.3 0.5 8.8 Total other comprehensive loss (18.8 ) (24.6 ) (1.5 ) (44.9 ) Balance, March 31, 2020 $ (61.4 ) $ (160.9 ) $ (1.0 ) $ (223.3 ) (a) Amounts are included in the calculation of net periodic benefit cost for the Company’s defined benefit plans, which include pension and other postretirement plans. See Note 18 for additional information about the Company’s pension plans. (b) Amounts represent net gains and losses associated with cash flow hedges that were reclassified to net earnings. See Note 19 for additional information regarding derivative instruments. (c) As a result of the sale of its investment in NEX during fiscal 2020, the Company wrote off $0.6 million of accumulated foreign currency translation gains.

Segment and Geographic Informat

Segment and Geographic Information	12 Months Ended
	Mar. 31, 2021
Segment and Geographic Information [Abstract]
Segment and Geographic Information	Note 22: Segment and Geographic Information The Company’s product lines consist of heat-transfer components and systems. The Company serves commercial, industrial, and building HVAC&R markets and vehicular markets. The Company’s BHVAC segment provides heating, ventilating and air conditioning products to customers throughout the world. The Company’s CIS segment provides coils, coolers, and coating solutions to global customers. The Company’s HDE and Automotive segments represent its vehicular businesses and primarily serve the commercial vehicle, off-highway and automotive and light vehicle markets. In addition, the HDE segment serves the commercial vehicle and automotive aftermarkets in Brazil. Each operating segment is managed by a vice president and has separate financial results reviewed by the Company’s chief operating decision maker. These results are used by management in evaluating the performance of each segment and in making decisions on the allocation of resources among the Company’s various businesses. Effective April 1, 2020, the Company began managing its global automotive business separate from the other businesses within the previously reported Vehicular Thermal Solutions (“VTS”) segment. The Company is managing the automotive business as the Automotive segment as it progresses towards the sale or eventual exit of its underlying automotive business operations. The other businesses of the VTS segment, including the commercial vehicle and off-highway businesses, are being managed as the HDE segment. The segment realignment had no impact on the CIS and BHVAC segments or on the Company’s consolidated financial position, results of operations, and cash flows. Segment financial information for fiscal 2020 and 2019 has been recast to conform to the fiscal 2021 presentation. The following is a summary of net sales, gross profit, and operating income by segment. See Note 3 for additional information regarding net sales by primary end market. Year ended March 31, 2021 External Sales Inter-segment Sales Total Net sales: BHVAC $ 240.3 $ 0.3 $ 240.6 CIS 528.1 3.9 532.0 HDE 648.3 33.8 682.1 Automotive 391.7 6.6 398.3 Segment total 1,808.4 44.6 1,853.0 Corporate and eliminations - (44.6 ) (44.6 ) Net sales $ 1,808.4 $ - $ 1,808.4 Year ended March 31, 2020 External Sales Inter-segment Sales Total Net sales: BHVAC $ 219.4 $ 1.7 $ 221.1 CIS 620.1 3.8 623.9 HDE 693.8 52.1 745.9 Automotive 442.2 2.7 444.9 Segment total 1,975.5 60.3 2,035.8 Corporate and eliminations - (60.3 ) (60.3 ) Net sales $ 1,975.5 $ - $ 1,975.5 Year ended March 31, 2019 External Sales Inter-segment Sales Total Net sales: BHVAC $ 209.1 $ 3.3 $ 212.4 CIS 704.7 2.9 707.6 HDE 811.8 60.5 872.3 Automotive 487.1 1.8 488.9 Segment total 2,212.7 68.5 2,281.2 Corporate and eliminations - (68.5 ) (68.5 ) Net sales $ 2,212.7 $ - $ 2,212.7 Inter-segment sales are accounted for based upon an established markup over production costs. Net sales for Corporate and eliminations primarily represent the elimination of inter-segment sales. Years ended March 31, 2021 2020 2019 Gross profit: _ $’s % of sales _ $’s % of sales _ $’s % of sales BHVAC $ 83.0 34.5 % $ 71.5 32.3 % $ 63.4 29.9 % CIS 66.5 12.5 % 92.9 14.9 % 114.9 16.2 % HDE 88.4 13.0 % 96.6 13.0 % 127.8 14.7 % Automotive 56.0 14.1 % 48.4 10.9 % 59.0 12.1 % Segment total 293.9 15.9 % 309.4 15.2 % 365.1 16.0 % Corporate and eliminations (0.5 ) - (1.9 ) - 0.4 - Gross profit $ 293.4 16.2 % $ 307.5 15.6 % $ 365.5 16.5 % Years ended March 31, Operating income: 2021 2020 2019 BHVAC $ 47.2 $ 36.4 $ 26.9 CIS 8.2 32.9 53.4 HDE 36.8 37.8 65.0 Automotive (150.9 ) (10.0 ) (0.4 ) Segment total (58.7 ) 97.1 144.9 Corporate and eliminations (a) (39.0 ) (59.2 ) (35.2 ) Operating (loss) income $ (97.7 ) $ 37.9 $ 109.7 (a) The operating loss for Corporate includes certain research and development costs, legal, finance and other general corporate and central services expenses, and other costs that are either not directly attributable to an operating segment or not considered when management evaluates segment performance. During fiscal 2021, 2020 and 2019, the Company recorded $6.6 million, $39.2 million, and $7.1 million respectively, of costs directly associated with its review of strategic alternatives for the liquid-and air-cooled automotive businesses, including costs to separate and prepare the underlying businesses for potential sale. The following is a summary of total assets by segment: March 31, 2021 2020 BHVAC $ 110.8 $ 102.3 CIS 609.2 617.7 HDE 438.7 417.4 Automotive (a) 124.2 272.5 Corporate and eliminations (b) (6.2 ) 126.2 Total assets $ 1,276.7 $ 1,536.1 (a) During fiscal 2021, the Company recorded impairment charges totaling $166.8 million within the Automotive segment, primarily related to the property, plant and equipment of the liquid- and air-cooled automotive businesses, which are classified as held for sale as of March 31, 2021. See Note 2 for additional information. (b) At March 31, 2021, Corporate assets totaled $17.5 million and were more than offset by eliminations for intercompany balances, including accounts receivable. During fiscal 2021, the Company recorded income tax charges totaling $103.3 million, which established a full valuation allowance on deferred tax assets in the U.S that are recorded at Corporate. See Note 8 for additional information. The following is a summary of capital expenditures and depreciation and amortization expense by segment: Years ended March 31, Capital expenditures: 2021 2020 2019 BHVAC $ 1.5 $ 3.1 $ 1.3 CIS 6.1 15.0 16.4 HDE 13.5 31.5 29.4 Automotive 11.1 19.1 24.9 Corporate 0.5 2.6 1.9 Total capital expenditures $ 32.7 $ 71.3 $ 73.9 Years ended March 31, Depreciation and amortization expense: 2021 2020 2019 BHVAC $ 3.1 $ 3.4 $ 3.5 CIS 25.0 24.0 23.9 HDE 25.5 25.4 26.3 Automotive (a) 13.2 22.3 21.2 Corporate 1.8 2.0 2.0 Total depreciation and amortization $ 68.6 $ 77.1 $ 76.9 (a) Upon classifying the liquid- and air-cooled automotive businesses as held for sale, the Company ceased depreciating the long-lived assets within the disposal groups. See Note 2 for additional information. The following is a summary of net sales by geographical area, based upon the location of the selling unit: Years ended March 31, 2021 2020 2019 United States $ 765.7 $ 941.9 $ 1,032.3 China 217.6 168.5 172.1 Italy 188.6 187.4 217.3 Hungary 153.7 142.4 165.6 United Kingdom 96.4 82.0 86.6 Germany 83.4 97.5 123.1 Austria 59.6 93.0 116.2 Other 243.4 262.8 299.5 Net sales $ 1,808.4 $ 1,975.5 $ 2,212.7 The following is a summary of property, plant and equipment by geographical area: March 31, 2021 2020 United States $ 80.3 $ 114.6 Mexico 43.5 50.0 China 31.3 56.8 Italy 30.0 49.8 Hungary 27.6 55.4 Germany 1.8 27.0 Austria - 26.0 Other 55.4 68.4 Total property, plant and equipment (a) $ 269.9 $ 448.0 (a) In connection with the pending sales of the liquid- and air-cooled automotive businesses within the Automotive segment, the Company wrote-down the carrying value of the disposal groups’ property, plant and equipment to zero as of March 31, 2021. The assets impaired were located in Hungary, Germany, Austria, China, the U.S., Italy, and the Netherlands. See Note 2 for additional information on the held for sale businesses and impairment charges recorded during fiscal 2021.

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
	Mar. 31, 2021
Schedule II - Valuation and Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Accounts	SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS For the years ended March 31, 2021, 2020 and 2019 (In millions) Additions Description Balance at Beginning of Period Charged (Benefit) to Costs and Expenses Charged to Other Accounts Reclassified as Held for Sale Balance at End of Period 2021: Valuation Allowance for Deferred Tax Assets $ 46.9 $ 86.2 $ 2.8 (a) $ (45.2 ) $ 90.7 2020: Valuation Allowance for Deferred Tax Assets $ 43.4 $ 4.5 $ (1.0 ) (a) $ - $ 46.9 2019: Valuation Allowance for Deferred Tax Assets $ 48.9 $ (1.6 ) $ (3.9 ) (a) $ - $ 43.4 (a) Foreign currency translation and other adjustments.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Mar. 31, 2021
Significant Accounting Policies [Abstract]
Nature of Operations	Nature of Operations Modine Manufacturing Company (“Modine” or the “Company”) specializes in providing innovative thermal management solutions to diversified global markets and customers. The Company is a global leader in thermal management technology and solutions for sale into a wide array of commercial, industrial, and building heating, ventilating, air conditioning, and refrigeration (“HVAC&R”) markets. In addition, the Company is a leading provider of engineered heat transfer systems and high-quality heat transfer components for use in on- and off-highway original equipment manufacturer (“OEM”) vehicular applications. The Company’s primary product groups include i) heating, ventilation and air conditioning; ii) coils, coolers, and coatings; and iii) powertrain cooling and engine cooling.
Basis of Presentation	Basis of Presentation The Company prepares its consolidated financial statements in conformity with generally accepted accounting principles (“GAAP”) in the United States. These principles require management to make certain estimates and assumptions in determining assets, liabilities, revenue, expenses and related disclosures. Actual amounts could differ materially from those estimates.
Consolidation Principles	Consolidation Principles The consolidated financial statements include the accounts of Modine Manufacturing Company and its majority-owned or Modine-controlled subsidiaries. The Company eliminates intercompany transactions and balances in consolidation.
Revenue Recognition	Revenue Recognition The Company recognizes revenue based upon consideration specified in a contract and as it satisfies performance obligations by transferring control over its products to its customers, which may be at a point in time or over time. The majority of the Company’s revenue is recognized at a point in time, based upon shipment terms. A portion of the Company’s revenue is recognized over time, based upon estimated progress towards satisfaction of the contractual performance obligations. See Note 3 for additional information.
Shipping and Handling Costs	Shipping and Handling Costs The Company records shipping and handling costs incurred upon the shipment of products to its customers in cost of sales, and related amounts billed to these customers in net sales.
Trade Accounts Receivable	Trade Accounts Receivable The Company records trade receivables at the invoiced amount. Trade receivables do not bear interest if paid according to the original terms. The Company maintains an allowance for credit losses, representing its estimate of expected losses associated with its trade accounts receivable. The Company bases its estimate using historical loss experience and considers the aging of the receivables and risks specific to customers where appropriate. At March 31, 2021 and 2020, the allowance for credit losses was $1.3 million and $1.9 million, respectively. The Company enters into supply chain financing programs from time to time to sell accounts receivable, without recourse, to third-party financial institutions. Sales of accounts receivable are reflected as a reduction of accounts receivable on the consolidated balance sheets and the proceeds are included in cash flows from operating activities in the consolidated statements of cash flows. During fiscal 2021, 2020, and 2019, the Company sold $88.7 million, $75.4 million, and $85.1 million, respectively, of accounts receivable to accelerate cash receipts. During fiscal 2021, 2020, and 2019, the Company recorded a loss on the sale of accounts receivable of $0.2 million, $0.5 million, and $0.6 million, respectively, in the consolidated statements of operations.
Warranty	Warranty The Company provides product warranties for specific product lines and accrues for estimated future warranty costs in the period in which the sale is recorded. The Company records warranty expense, within cost of sales, based upon historical and current claims data or based upon estimated future claims. Accrual balances, which are recorded within other current liabilities, are monitored and adjusted if it is probable that expected claims will differ from previous estimates. See Note 15 for additional information.
Tooling	T ooling The Company accounts for production tooling costs as a component of property, plant and equipment when it owns title to the tooling and amortizes the capitalized cost to cost of sales over the estimated life of the asset, which is generally . At March 31, 2021 and 2020 Company-owned tooling totaled and , respectively. The decrease in Company-owned tooling during fiscal 2021 was primarily due to asset impairment charges recorded within the Automotive segment upon classification of the liquid- and air-cooled automotive businesses as held for sale. See Note 2 for additional information. In certain instances, tooling is customer-owned. At the time customer-owned tooling is completed and customer acceptance is obtained, the Company records tooling revenue and related production costs within net sales and cost of sales, respectively, in the consolidated statements of operations. If the customer has agreed to reimburse the Company, unbilled customer-owned tooling costs are recorded as a receivable within other current assets. No significant arrangements exist where customer-owned tooling costs were not accompanied by guaranteed reimbursement. At March 31, 2021 and 2020 customer-owned tooling receivables totaled and , respectively. Of the , was included within assets held for sale on the March 31, 2021 consolidated balance sheet.
Stock-based Compensation	Stock-based Compensation The Company recognizes stock-based compensation using the fair value method. Accordingly, compensation expense for stock options, restricted stock and performance-based stock awards is calculated based upon the fair value of the instruments at the time of grant, and is recognized as expense over the respective vesting periods. See Note 5 for additional information.
Research and Development	Research and Development The Company expenses research and development costs as incurred within SG&A expenses. During fiscal 2021, 2020, and 2019, research and development costs totaled
Translation of Foreign Currencies	Translation of Foreign Currencies The Company translates assets and liabilities of foreign subsidiaries and equity investments into U.S. dollars at the period-end exchange rates, and translates income and expense items at the monthly average exchange rate for the period in which the transactions occur. The Company reports resulting translation adjustments within accumulated other comprehensive income (loss) within shareholders’ equity. The Company includes foreign currency transaction gains or losses in the statement of operations within other income and expense.
Derivative Instruments	Derivative Instruments The Company enters into derivative financial instruments from time to time to manage certain financial risks. The Company enters into forward contracts to reduce exposure to changing future purchase prices for aluminum and copper and into foreign currency exchange contracts to hedge specific foreign currency-denominated assets and liabilities as well as forecasted transactions. The Company designates certain derivative financial instruments as cash flow hedges for accounting purposes. These instruments are used to manage financial risks and are not speculative. See Note 19 for additional information.
Income Taxes	Income Taxes The Company determines deferred tax assets and liabilities based upon the difference between the amounts reported in the financial statements and the tax basis of assets and liabilities, using enacted tax rates in effect in the years in which the differences are expected to reverse. The Company establishes a valuation allowance if it is more likely than not that a deferred tax asset, or portion thereof, will not be realized. The Company records the tax effects of global intangible low-taxed income (“GILTI”) as a period expense in the applicable tax year. The Company uses the portfolio approach for releasing income tax effects from accumulated other comprehensive income (loss). See Note 8 for additional information.
Earnings per Share	Earnings per Share The Company calculates basic earnings per share based upon the weighted-average number of common shares outstanding during the period, while the calculation of diluted earnings per share includes the dilutive effect of potential common shares outstanding during the period. The calculation of diluted earnings per share excludes potential common shares if their inclusion would have an anti-dilutive effect. In prior years, certain restricted stock awards provided recipients with a non-forfeitable right to receive dividends declared by the Company. These restricted stock awards have been included in computing earnings per share pursuant to the two-class method. See Note 9 for additional information.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly-liquid investments with original maturities of three months or less to be cash equivalents. Under the Company’s cash management system, cash balances at certain banks are funded when checks are presented for payment. To the extent checks issued, but not yet presented for payment, exceed the balance on hand at the specific bank against which they were written, the Company reports the amount of those checks within accounts payable in the consolidated balance sheets.
Short-term Investments	Short-term Investments The Company invests in time deposits with original maturities of more than three months but not more than one year. The Company records these short-term investments at cost, which approximates fair value, within other current assets in the consolidated balance sheets. As of March 31, 2021 and 2020, the Company’s short-term investments totaled $3.7 million and $3.2 million, respectively.
Inventories	Inventories The Company values inventories using a first-in, first-out or weighted-average basis, at the lower of cost and net realizable value.
Property, Plant and Equipment	Property, Plant and Equipment The Company records property, plant and equipment at cost. For financial reporting purposes, the Company computes depreciation using the straight-line method over the expected useful lives of the assets. The Company expenses maintenance and repair costs as incurred. The Company capitalizes costs of improvements. Upon the sale or other disposition of an asset, the Company removes the cost and related accumulated depreciation from the accounts and includes the gain or loss in the consolidated statements of operations. Capital expenditures of , and were accrued at March 31, 2021, 2020 and 2019 respectively. Of the , was included within liabilities held for sale on the March 31, 2021 consolidated balance sheet. All of the other accrued capital expenditure amounts are presented within accounts payable.
Leases	Leases The Company’s most significant leases represent leases of real estate, such as manufacturing facilities, warehouses, and office buildings. The Company also leases certain manufacturing and IT equipment and vehicles. The Company recognizes right-of-use (“ROU”) assets and lease liabilities at the commencement date, based upon the present value of lease payments over the lease term. See Note 16 for additional information.
Goodwill	Goodwill The Company does not amortize goodwill; rather, it tests for impairment annually unless conditions exist that would require a more frequent evaluation. The Company performs an assessment of the fair value of its reporting units for goodwill impairment testing based upon, among other things, the present value of expected future cash flows. The Company performed its goodwill impairment test as of March 31, 2021 and determined the fair value of each of its reporting units exceeded the respective book value. See Note 14 for additional information.
Impairment of Held and Used Long-lived Assets	I mpairment of Held and Used Long-lived Assets The Company reviews held and used long-lived assets, including property, plant and equipment and intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be fully recoverable. In these instances, the Company compares the undiscounted future cash flows expected to be generated from the asset with its carrying value. If the asset’s carrying value exceeds expected future cash flows, the Company measures and records an impairment loss, if any, as the amount by which the carrying value of the asset exceeds its fair value. The Company estimates fair value using a variety of valuation techniques, including discounted cash flows, market values and comparison values for similar assets.
Assets Held for Sale	Assets Held for Sale The Company considers assets to be held for sale when management approves and commits to a formal plan to actively market the asset for sale at a reasonable price in relation to its fair value, the asset is available for immediate sale in its present condition, an active program to locate a buyer and other actions required to complete the sale have been initiated, the sale of the asset is expected to be completed within one year and it is unlikely that significant changes will be made to the plan. Upon designation as held for sale, the Company records the carrying value of the assets at the lower of its carrying value or its estimated fair value, less costs to sell. The Company ceases to record depreciation expense at the time of designation as held for sale. During fiscal 2021 the Company classified the liquid- and air-cooled automotive businesses as held for sale and recorded impairment charges totaling within the Automotive segment. See Note 2 for additional information.
Deferred Compensation Trusts	Deferred Compensation Trusts The Company maintains deferred compensation trusts to fund future obligations under its non-qualified deferred compensation plans. The trusts’ investments in third-party debt and equity securities are presented within other noncurrent assets in the consolidated balance sheets.
Self-insurance Reserves	Self-insurance Reserves The Company retains a portion of the financial risk for certain insurance coverage, including property, general liability, workers compensation, and employee healthcare, and therefore maintains reserves that estimate the impact of unreported and under-reported claims that fall below various stop-loss limits and deductibles under its insurance policies. The Company maintains reserves for the estimated settlement cost of known claims, as well as estimates of incurred but not reported claims. The Company charges costs of claims, including the impact of changes in reserves due to claim experience and severity, to operations. The Company reviews and updates the amount of its insurance-related reserves on a quarterly basis.
Environmental Liabilities	Environmental Liabilities The Company records liabilities for environmental assessments and remediation activities in the period in which its responsibility is probable and the costs can be reasonably estimated. The Company records environmental indemnification assets from third parties, including prior owners, when recovery is probable. To the extent that the required remediation procedures change, or additional contamination is identified, the Company’s estimated environmental liabilities may also change. See Note 20 for additional information.
New Accounting Guidance Adopted	New Accounting Guidance Adopted in Fiscal 2021 Credit Losses In June 2016 the Financial Accounting Standards Board (“FASB”) issued new guidance related to the accounting for credit losses for certain financial assets, including trade accounts receivable and contract assets. The new guidance modifies the credit loss model to measure and recognize credit losses based upon expected losses rather than incurred losses. The Company adopted this guidance as of April 1, 2020 The adoption did not have a material impact on the Company’s consolidated balance sheets, statements of operations or statements of cash flows. New Accounting Guidance Adopted in Fiscal 2020 Leases In February 2016 the FASB issued new comprehensive lease accounting guidance that requires balance sheet recognition for most leases. The Company adopted this guidance effective April 1, 2019 using a modified-retrospective transition method, under which it elected not to adjust comparative periods. The Company elected the package of practical expedients permitted under the new guidance, and, as a result, the Company did not reassess the classification of existing leases or initial direct costs thereof, or whether existing contracts contain leases. In addition, the Company elected accounting policies to not record short-term leases on the balance sheet and to not separate lease and non-lease components. The Company did not elect the hindsight practical expedient. Upon adoption of this new guidance on April 1, 2019, the Company recognized right-of-use assets for operating leases totaling $61.3 million and corresponding current noncurrent Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income In February 2018, the FASB issued new guidance related to the accounting for certain stranded income tax effects in accumulated other comprehensive income (loss) resulting from tax reform legislation that was enacted in the U.S. in December 2017. This guidance provided companies the option to reclassify stranded income tax effects to retained earnings. The Company adopted this guidance as of April 1, 2019 and chose not to reclassify stranded income tax effects; therefore, the adoption of this guidance did not impact the Company’s consolidated financial statements. New Accounting Guidance Adopted in Fiscal 2019 Revenue Recognition In May 2014 the FASB issued new guidance that outlines a comprehensive model for entities to use in accounting for revenue arising from contracts with customers. The core principle of the new guidance is that companies are to recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company adopted this new guidance for fiscal 2019 using the modified-retrospective transition method. As a result of its adoption of the new guidance, the Company recorded an increase of to retained earnings as of April 1, 2018 along with related balance sheet reclassifications. See Note 3 for additional information regarding revenue recognition. Income Taxes: Intra-Entity Transfers of Assets Other than Inventory In October 2016, the FASB issued new guidance related to income tax accounting for intercompany asset transfers. This new guidance requires companies to recognize the income tax effects of intercompany asset transfers other than inventory at the transaction date. The income tax effects of these transfers were previously deferred. The Company adopted this new guidance for fiscal 2019 using the modified-retrospective transition method. Upon adoption, the Company recorded a decrease to retained earnings of $8.3 million as of April 1, 2018.

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	12 Months Ended
	Mar. 31, 2021
Significant Accounting Policies [Abstract]
Supplemental Cash Flow Information	S upplemental Cash Flow Information Years ended March 31, 2021 2020 2019 Interest paid $ 17.9 $ 21.4 $ 22.3 Income taxes paid 19.7 18.8 22.2

Assets Held for Sale (Tables)

Assets Held for Sale (Tables)	12 Months Ended
	Mar. 31, 2021
Assets Held for Sale [Abstract]
Assets and Liabilities Held for Sale	The Company classified the assets and liabilities of the liquid- and air-cooled automotive businesses as held for sale on the March 31, 2021 consolidated balance sheet. The major classes of assets and liabilities held for sale were as follows: March 31, 2021 ASSETS Cash and cash equivalents $ 8.0 Trade accounts receivables - net 54.4 Inventories 24.7 Other current assets 12.8 Property, plant and equipment - net 164.0 Other noncurrent assets 8.8 Impairment of carrying value (165.1 ) Total assets held for sale $ 107.6 LIABILITIES Short-term debt $ 5.0 Accounts payable 46.3 Accrued compensation and employee benefits 15.5 Other current liabilities 12.2 Pensions 17.8 Other noncurrent liabilities 6.5 Total liabilities held for sale $ 103.3

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Mar. 31, 2021
Revenue Recognition [Abstract]
Disaggregation of Revenue	The tables below present revenue to external customers for each of the Company’s business segments by primary end market, geographic location, and based upon the timing of revenue recognition: Year ended March 31, 2021 BHVAC CIS HDE Automotive Segment Total Primary end market: Commercial HVAC&R $ 181.6 $ 420.6 $ - $ - $ 602.2 Data center cooling 58.7 47.3 - - 106.0 Industrial cooling - 55.4 - - 55.4 Commercial vehicle - - 250.4 14.4 264.8 Off-highway - - 260.7 3.4 264.1 Automotive and light vehicle - - 97.9 357.8 455.7 Other 0.3 8.7 73.1 22.7 104.8 Net sales $ 240.6 $ 532.0 $ 682.1 $ 398.3 $ 1,853.0 Geographic location: Americas $ 144.2 $ 267.7 $ 388.2 $ 51.0 $ 851.1 Europe 96.4 219.8 133.2 282.0 731.4 Asia - 44.5 160.7 65.3 270.5 Net sales $ 240.6 $ 532.0 $ 682.1 $ 398.3 $ 1,853.0 Timing of revenue recognition: Products transferred at a point in time $ 240.6 $ 486.3 $ 655.2 $ 398.3 $ 1,780.4 Products transferred over time - 45.7 26.9 - 72.6 Net sales $ 240.6 $ 532.0 $ 682.1 $ 398.3 $ 1,853.0 Year ended March 31, 2020 BHVAC CIS HDE Automotive Segment Total Primary end market: Commercial HVAC&R $ 176.6 $ 463.1 $ - $ - $ 639.7 Data center cooling 42.7 107.5 - - 150.2 Industrial cooling - 43.5 - - 43.5 Commercial vehicle - - 302.1 21.6 323.7 Off-highway - - 240.8 13.1 253.9 Automotive and light vehicle - - 108.4 400.4 508.8 Other 1.8 9.8 94.6 9.8 116.0 Net sales $ 221.1 $ 623.9 $ 745.9 $ 444.9 $ 2,035.8 Geographic location: Americas $ 139.1 $ 345.9 $ 484.5 $ 70.3 $ 1,039.8 Europe 82.0 232.6 141.2 321.0 776.8 Asia - 45.4 120.2 53.6 219.2 Net sales $ 221.1 $ 623.9 $ 745.9 $ 444.9 $ 2,035.8 Timing of revenue recognition: Products transferred at a point in time $ 221.1 $ 518.2 $ 715.1 $ 444.9 $ 1,899.3 Products transferred over time - 105.7 30.8 - 136.5 Net sales $ 221.1 $ 623.9 $ 745.9 $ 444.9 $ 2,035.8 Year ended March 31, 2019 BHVAC CIS HDE Automotive Segment Total Primary end market: Commercial HVAC&R $ 167.7 $ 506.3 $ - $ - $ 674.0 Data center cooling 41.3 145.7 - - 187.0 Industrial cooling - 47.8 - - 47.8 Commercial vehicle - - 352.6 35.0 387.6 Off-highway - - 298.1 16.0 314.1 Automotive and light vehicle - - 116.7 426.1 542.8 Other 3.4 7.8 104.9 11.8 127.9 Net sales $ 212.4 $ 707.6 $ 872.3 $ 488.9 $ 2,281.2 Geographic location: Americas $ 124.9 $ 413.6 $ 543.0 $ 71.0 $ 1,152.5 Europe 87.5 244.8 177.4 369.4 879.1 Asia - 49.2 151.9 48.5 249.6 Net sales $ 212.4 $ 707.6 $ 872.3 $ 488.9 $ 2,281.2 Timing of revenue recognition: Products transferred at a point in time $ 212.4 $ 571.1 $ 829.1 $ 488.9 $ 2,101.5 Products transferred over time - 136.5 43.2 - 179.7 Net sales $ 212.4 $ 707.6 $ 872.3 $ 488.9 $ 2,281.2
Contract Assets and Contract Liabilities from Contracts with Customers	Contract assets and contract liabilities from contracts with customers were as follows: March 31, 2021 March 31, 2020 Contract assets $ 5.7 $ 21.7 Contract liabilities 5.6 5.6

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Mar. 31, 2021
Fair Value Measurements [Abstract]
Fair Value of Pension Plan Assets	Plan assets related to the Company’s pension plans were classified as follows: March 31, 2021 Level 1 Level 2 Total Money market investments $ - $ 2.5 $ 2.5 Fixed income securities - 8.9 8.9 Pooled equity funds 37.3 - 37.3 U.S. government and agency securities - 14.5 14.5 Other 0.1 1.0 1.1 Fair value excluding investments measured at net asset value 37.4 26.9 64.3 Investments measured at net asset value 119.0 Total fair value $ 183.3 March 31, 2020 Level 1 Level 2 Total Money market investments $ - $ 2.4 $ 2.4 Fixed income securities - 8.7 8.7 Pooled equity funds 17.9 - 17.9 U.S. government and agency securities - 13.1 13.1 Other 0.1 0.7 0.8 Fair value excluding investment measured at net asset value 18.0 24.9 42.9 Investments measured at net asset value 88.2 Total fair value $ 131.1

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Mar. 31, 2021
Stock-Based Compensation [Abstract]
Assumptions Used in Determining Fair Value of Options	The Company estimated the fair value of option awards on the date of grant using the Black-Scholes option valuation model and the following assumptions: Years ended March 31, 2021 2020 2019 Fair value of options $ 3.46 $ 5.56 $ 7.81 Expected life of awards in years 6.1 6.3 6.3 Risk-free interest rate 0.4 % 2.2 % 2.8 % Expected volatility of the Company’s stock 54.1 % 39.2 % 39.7 % Expected dividend yield on the Company’s stock 0.0 % 0.0 % 0.0 %
Stock Option Activity	A summary of stock option activity for fiscal 2021 was as follows: Shares Weighted-average exercise price Weighted-average remaining contractual term (years) Aggregate intrinsic value Outstanding, beginning 1.4 $ 12.49 Granted 0.4 6.88 Exercised (0.4 ) 10.56 Forfeited or expired (0.3 ) 10.94 Outstanding, ending 1.1 $ 11.63 7.1 $ 3.9 Exercisable, March 31, 2021 0.5 $ 13.80 5.1 $ 0.9
Information Related to Stock Options Exercised	Additional information related to stock options exercised is as follows: Years ended March 31, 2021 2020 2019 Intrinsic value of stock options exercised $ 1.4 $ 0.1 $ 0.7 Proceeds from stock options exercised 4.1 0.1 1.1
Restricted Stock Activity	A summary of restricted stock activity for fiscal 2021 was as follows: Shares Weighted-average price Non-vested balance, beginning 0.5 $ 14.48 Granted 0.8 7.53 Vested (0.5 ) 9.64 Forfeited (0.1 ) 13.40 Non-vested balance, ending 0.7 $ 10.05

Restructuring Activities (Table

Restructuring Activities (Tables)	12 Months Ended
	Mar. 31, 2021
Restructuring Activities [Abstract]
Restructuring and Repositioning Expenses	Restructuring and repositioning expenses were as follows: Years ended March 31, 2021 2020 2019 Employee severance and related benefits $ 11.7 $ 10.2 $ 8.7 Other restructuring and repositioning expenses 1.7 2.0 0.9 Total $ 13.4 $ 12.2 $ 9.6
Changes in Accrued Severance	The Company accrues severance in accordance with its written plans, procedures, and relevant statutory requirements. Changes in accrued severance were as follows: Years ended March 31, 2021 2020 Beginning balance $ 5.0 $ 10.0 Additions 11.7 10.2 Payments (10.5 ) (15.1 ) Reclassified as held for sale (2.5 ) - Effect of exchange rate changes 0.3 (0.1 ) Ending balance $ 4.0 $ 5.0

Other Income and Expense (Table

Other Income and Expense (Tables)	12 Months Ended
	Mar. 31, 2021
Other Income and Expense [Abstract]
Other Income and Expense	Other income and expense consisted of the following: Years ended March 31, 2021 2020 2019 Interest income $ 0.5 $ 0.4 $ 0.4 Foreign currency transactions (a) 0.6 (2.4 ) (2.3 ) Net periodic benefit cost (b) (3.3 ) (3.0 ) (2.9 ) Equity in earnings of non-consolidated affiliate (c) - 0.2 0.7 Total other expense - net $ (2.2 ) $ (4.8 ) $ (4.1 ) (a) Foreign currency transactions primarily consist of foreign currency transaction gains and losses on the re-measurement or settlement of foreign currency-denominated assets and liabilities, including intercompany loans and transactions denominated in a foreign currency, along with gains and losses on foreign currency exchange contracts. (b) Net periodic benefit cost for the Company’s pension and postretirement plans is exclusive of service cost . (c) During fiscal 2020, the Company sold its ownership interest in Nikkei Heat Exchanger Company, Ltd. As a result of the sale, the Company recorded a gain of $ 0.1 million , which is included within the fiscal 2020 amount. See Note 1 for additional information.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Mar. 31, 2021
Income Taxes [Abstract]
Earnings (Loss) Before Income Taxes	Years ended March 31, 2021 2020 2019 Components of (loss) earnings before income taxes: United States $ (48.7 ) $ (26.1 ) $ 22.4 Foreign (70.6 ) 36.5 58.4 Total (loss) earnings before income taxes $ (119.3 ) $ 10.4 $ 80.8
Income Tax Provision (Benefit)	Income tax provision (benefit): Federal: Current $ (0.1 ) $ (3.4 ) $ (20.4 ) Deferred 58.3 (1.7 ) (4.2 ) State: Current 0.4 (0.1 ) 0.7 Deferred 9.2 (2.3 ) 1.9 Foreign: Current 22.0 14.9 19.0 Deferred 0.4 5.0 (2.1 ) Total income tax provision (benefit) $ 90.2 $ 12.4 $ (5.1 )
Reconciliation of U.S. Federal Statutory Rate to Effective Tax Rate	The reconciliation between the U.S. federal statutory rate and the Company’s effective tax rate was as follows: Years ended March 31, 2021 2020 2019 Statutory federal tax 21.0 % 21.0 % 21.0 % State taxes, net of federal benefit 0.9 (12.0 ) 3.6 Taxes on non-U.S. earnings and losses (9.1 ) 32.9 3.9 Valuation allowances (92.9 ) 156.9 4.0 Tax credits 2.2 (36.7 ) (26.1 ) Compensation (1.3 ) 4.0 (0.1 ) Tax rate or law changes (0.2 ) 3.6 (12.0 ) Uncertain tax positions, net of settlements 0.1 (37.9 ) 0.4 Notional interest deductions 1.3 (12.5 ) (2.5 ) Dividends and taxable foreign inclusions 3.0 (11.0 ) 1.6 Other (0.6 ) 10.9 (0.1 ) Effective tax rate (75.6 %) 119.2 % (6.3 %)
Deferred Tax Assets and Liabilities	The tax effects of temporary differences that gave rise to deferred tax assets and liabilities were as follows: March 31, 2021 2020 Deferred tax assets: Accounts receivable $ 0.3 $ 0.3 Inventories 4.5 4.5 Plant and equipment 7.5 4.7 Lease liabilities 14.0 15.7 Pension and employee benefits 24.0 45.1 Net operating and capital losses 52.7 70.2 Credit carryforwards 51.8 56.8 Other, principally accrued liabilities 8.9 8.1 Total gross deferred tax assets 163.7 205.4 Less: valuation allowances (90.7 ) (46.9 ) Net deferred tax assets 73.0 158.5 Deferred tax liabilities: Plant and equipment 9.8 13.1 Lease assets 13.8 15.6 Goodwill 5.1 4.8 Intangible assets 25.1 26.4 Other 0.6 1.9 Total gross deferred tax liabilities 54.4 61.8 Net deferred tax assets $ 18.6 $ 96.7
Unrecognized Tax Benefits	Unrecognized tax benefits were as follows: Years ended March 31, 2021 2020 Beginning balance $ 9.7 $ 13.8 Gross increases - tax positions in prior period 0.1 0.3 Gross decreases - tax positions in prior period (0.6 ) (1.0 ) Gross increases - tax positions in current period 0.9 1.1 Settlements - (2.1 ) Lapse of statute of limitations (0.5 ) (2.4 ) Ending balance $ 9.6 $ 9.7
Tax Years Subject to Examination	The Company files income tax returns in multiple jurisdictions and is subject to examination by taxing authorities throughout the world. At March 31, 2021, the Company was under income tax examination in a number of jurisdictions. The following tax years remain subject to examination for the Company’s major tax jurisdictions: Germany Fiscal 2015 - Fiscal 2020 Italy Fiscal 2016 - Fiscal 2020 United States Fiscal 2017 - Fiscal 2020

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Basic and Diluted Earnings Per Share	The components of basic and diluted earnings per share were as follows: Years ended March 31, 2021 2020 2019 Basic Earnings Per Share: Net (loss) earnings attributable to Modine $ (210.7 ) $ (2.2 ) $ 84.8 Less: Undistributed earnings attributable to unvested shares - - (0.4 ) Net (loss) earnings available to Modine shareholders $ (210.7 ) $ (2.2 ) $ 84.4 Weighted-average shares outstanding - basic 51.3 50.8 50.5 Net (loss) earnings per share - basic $ (4.11 ) $ (0.04 ) $ 1.67 Diluted Earnings Per Share: Net (loss) earnings attributable to Modine $ (210.7 ) $ (2.2 ) $ 84.8 Less: Undistributed earnings attributable to unvested shares - - (0.2 ) Net (loss) earnings available to Modine shareholders $ (210.7 ) $ (2.2 ) $ 84.6 Weighted-average shares outstanding - basic 51.3 50.8 50.5 Effect of dilutive securities - - 0.8 Weighted-average shares outstanding - diluted 51.3 50.8 51.3 Net (loss) earnings per share - diluted $ (4.11 ) $ (0.04 ) $ 1.65

Cash, Cash Equivalents and Re_2

Cash, Cash Equivalents and Restricted Cash (Tables)	12 Months Ended
	Mar. 31, 2021
Cash, Cash Equivalents and Restricted Cash [Abstract]
Cash and Cash Equivalents and Restricted Cash	Cash, cash equivalents and restricted cash consisted of the following: March 31, 2021 2020 Cash and cash equivalents $ 37.8 $ 70.9 Restricted cash 0.1 0.4 Cash and restricted cash held for sale 8.2 - Total cash, cash equivalents, restricted cash and cash held for sale $ 46.1 $ 71.3

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Mar. 31, 2021
Inventories [Abstract]
Inventories	Inventories consisted of the following: March 31, 2021 2020 Raw materials $ 117.1 $ 123.6 Work in process 38.5 34.6 Finished goods 40.0 49.2 Total inventories $ 195.6 $ 207.4

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Mar. 31, 2021
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, plant and equipment, including depreciable lives, consisted of the following: March 31, 2021 2020 Land $ 16.4 $ 19.7 Buildings and improvements ( 10 40 203.5 276.7 Machinery and equipment ( 3 15 623.2 870.3 Office equipment ( 3 10 81.3 95.2 Construction in progress 19.0 40.5 943.4 1,302.4 Less: accumulated depreciation (673.5 ) (854.4 ) Net property, plant and equipment $ 269.9 $ 448.0

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Mar. 31, 2021
Intangible Assets [Abstract]
Intangible Assets	Intangible assets consisted of the following: March 31, 2021 March 31, 2020 Gross Carrying Value Accumulated Amortization Net Intangible Assets Gross Carrying Value Accumulated Amortization Net Intangible Assets Customer relationships $ 62.8 $ (16.9 ) $ 45.9 $ 60.8 $ (12.6 ) $ 48.2 Trade names 51.5 (11.4 ) 40.1 58.3 (16.2 ) 42.1 Acquired technology 23.9 (9.3 ) 14.6 23.6 (7.6 ) 16.0 Total intangible assets $ 138.2 $ (37.6 ) $ 100.6 $ 142.7 $ (36.4 ) $ 106.3

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Mar. 31, 2021
Goodwill [Abstract]
Changes in Carrying Amount of Goodwill	Changes in the carrying amount of goodwill, by segment and in the aggregate, were as follows: BHVAC CIS Automotive Total Balance, March 31, 2019 $ 14.1 $ 153.9 $ 0.5 $ 168.5 Impairment charge - - (0.5 ) (0.5 ) Effect of exchange rate changes (0.6 ) (1.3 ) - (1.9 ) Balance, March 31, 2020 13.5 152.6 - 166.1 Effect of exchange rate changes 1.3 3.3 - 4.6 Balance, March 31, 2021 $ 14.8 $ 155.9 $ - $ 170.7

Product Warranties and Other _2

Product Warranties and Other Commitments (Tables)	12 Months Ended
	Mar. 31, 2021
Product Warranties and Other Commitments [Abstract]
Changes in Accrued Warranty Costs	Changes in accrued warranty costs were as follows: Years ended March 31 , 2021 2020 Beginning balance $ 7.9 $ 9.2 Warranties recorded at time of sale 5.5 5.3 Adjustments to pre-existing warranties (0.9 ) (1.6 ) Settlements (5.6 ) (4.8 ) Reclassified as held for sale (2.0 ) - Effect of exchange rate changes 0.3 (0.2 ) Ending balance $ 5.2 $ 7.9

Leases (Tables)

Leases (Tables)	12 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Lease Assets and Liabilities Recorded in Consolidated Balance Sheet	Lease Assets and Liabilities The following table provides a summary of leases recorded on the consolidated balance sheets. The March 31, 2021 amounts exclude operating lease ROU assets and liabilities, which each totaled $ million, that are classified as held for sale on the Company’s consolidated balance sheet; see Note 2 for additional information. - Balance Sheet Location - March 31, 2021 March 31, 2020 Lease Assets Operating lease ROU assets Other noncurrent assets $ 54.1 $ 61.4 Finance lease ROU assets (a) Property, plant and equipment - net 8.3 8.5 Lease Liabilities Operating lease liabilities Other current liabilities $ 11.2 $ 10.9 Operating lease liabilities Other noncurrent liabilities 44.8 50.3 Finance lease liabilities Long-term debt - current portion 0.4 0.4 Finance lease liabilities Long-term debt 3.2 3.3 (a) Finance lease ROU assets were recorded net of accumulated amortization of $2.4 million and $1.8 million as of March 31, 2021 and 2020, respectively.
Components of Lease Expense	The components of lease expense were as follows: Years ended March 31, 2021 2020 Operating lease expense (a) $ 19.5 $ 21.2 Finance lease expense: Depreciation of ROU assets 0.5 0.5 Interest on lease liabilities 0.2 0.2 Total lease expense $ 20.2 $ 21.9 (a) In fiscal 2021 and 2020, operating lease expense included short-term lease expense of $3.5 million and $4.1 million, respectively. Variable lease expense was not significant.
Supplemental Cash Flow Information	Supplemental Cash Flow Information Years ended March 31, 2021 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 14.2 $ 14.7 Financing cash flows for finance leases 0.6 0.5 ROU assets obtained in exchange for lease liabilities Operating leases $ 9.8 $ 9.0 Finance leases 0.1 0.2
Lease Term and Discount Rates	Lease Term and Discount Rates March 31, 2021 March 31, 2020 Weighted-average remaining lease term: Operating leases 6.9 years 9.3 years Finance leases 7.8 years 8.8 years Weighted-average discount rate: Operating leases 3.3 % 3.5 % Finance leases 4.7 % 4.7 %
Maturity of Lease Liabilities	Future minimum rental payments for leases with initial non-cancellable lease terms in excess of one year were as follows at March 31, 2021: Fiscal Year Operating Leases Finance Leases 2022 $ 12.8 $ 0.6 2023 10.9 0.6 2024 8.1 0.6 2025 6.7 0.6 2026 6.1 0.5 2027 18.5 1.4 Total lease payments 63.1 4.3 Less: Interest (7.1 ) (0.7 ) Present value of lease liabilities $ 56.0 $ 3.6

Indebtedness (Tables)

Indebtedness (Tables)	12 Months Ended
	Mar. 31, 2021
Indebtedness [Abstract]
Long-Term Indebtedness	Long-term debt consisted of the following: io _ Fiscal year of maturity _ March 31, 2021 March 31, 2020 Term loans _ 2025 _ $ $178.9 $ $189.4 Revolving credit facility 2025 4.8 127.2 5.9 2029 100.0 100.0 5.8 2027 50.0 50.0 Other (a) 3.6 6.0 337.3 472.6 Less: current portion (21.9) (15.6) Less: unamortized debt issuance costs (4.2) (5.0) Total long-term debt $ $311.2 $ $452.0 (a) Other long-term debt primarily includes finance lease obligations and borrowings by foreign subsidiarie
Maturities of Long Term Debt and Capital Lease Obligations	Long-term debt matures as follows: Fiscal Year 2022 $ 21.9 2023 21.9 2024 21.9 2025 153.2 2026 33.8 2027 84.6 Total $ 337.3

Pension and Employee Benefit _2

Pension and Employee Benefit Plans (Tables)	12 Months Ended
	Mar. 31, 2021
Pension and Employee Benefit Plans [Abstract]
Changes in Benefit Obligations and Plan Assets	Changes in benefit obligations and plan assets, as well as the funded status of the Company’s global pension plans, were as follows: Years ended March 31, 2021 2020 Change in benefit obligation: Benefit obligation at beginning of year $ 264.7 $ 258.8 Service cost 0.4 0.4 Interest cost 7.9 9.1 Actuarial loss 2.7 15.5 Benefits paid (17.1 ) (18.2 ) Curtailment gains (a) (0.1 ) (0.3 ) Effect of exchange rate changes 2.1 (0.6 ) Benefit obligation at end of year $ 260.6 $ 264.7 Change in plan assets: Fair value of plan assets at beginning of year $ 131.1 $ 155.1 Actual return on plan assets 47.8 (11.6 ) Benefits paid (17.1 ) (18.2 ) Employer contributions 21.5 5.8 Fair value of plan assets at end of year $ 183.3 $ 131.1 Funded status at end of year $ (77.3 ) $ (133.6 ) Amounts recognized in the consolidated balance sheets: Current liability $ (0.9 ) $ (2.7 ) Noncurrent liability (58.6 ) (130.9 ) Liabilities held for sale (17.8 ) - $ (77.3 ) $ (133.6 ) (a) The curtailment gains in fiscal 2021 and 2020 are associated with headcount reductions in Europe within the Automotive segment. The Company recognizes curtailment gains as a component of net periodic benefit cost in the period headcount reductions occur. See Note 6 for additional information on the Company’s restructuring activities.
Pension Benefit Plans	Costs for the Company’s global pension plans included the following components: Years ended March 31, 2021 2020 2019 Components of net periodic benefit cost: Service cost $ 0.4 $ 0.4 $ 0.5 Interest cost 7.9 9.1 9.6 Expected return on plan assets (11.5 ) (12.0 ) (12.3 ) Amortization of net actuarial loss 6.9 6.0 5.6 Settlements (a) 0.2 0.2 0.2 Net periodic benefit cost $ 3.9 $ 3.7 $ 3.6 Other changes in benefit obligation recognized in other comprehensive income (loss): Net actuarial gain (loss) $ 33.8 $ (38.7 ) $ (7.7 ) Amortization of net actuarial loss 7.1 6.2 5.8 Total recognized in other comprehensive income (loss) $ 40.9 $ (32.5 ) $ (1.9 ) (a) The settlement charges resulted from activity associated with the Company’s non-U.S. pension plans.
Target and Plan Asset Allocations	Plan assets in the Company’s U.S. pension plans comprise 100 percent of the Company’s world-wide pension plan assets. The Company’s U.S. pension plan weighted-average asset allocations at the measurement dates of March 31, 2021 and 2020 were as follows: March 31, 2021 March 31, 2020 Target allocation Plan assets Target allocation Plan assets Equity securities 76 % 73 % 65 % 60 % Debt securities 18 % 17 % 21 % 22 % Real estate investments 5 % 9 % 13 % 16 % Cash and cash equivalents 1 % 1 % 1 % 2 % 100 % 100 % 100 % 100 %
Estimated Future Benefit Payments	Estimated pension benefit payments, excluding payments for pension liabilities held for sale, for the next ten fiscal years are as follows: Fiscal Year Estimated Pension Benefit Payments 2022 $ 15.2 2023 15.5 2024 15.6 2025 15.6 2026 15.5 2027 2031 74.6

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Mar. 31, 2021
Derivative Instruments [Abstract]
Derivative Financial Instruments Recorded in Consolidated Balance Sheets	The fair value of the Company’s derivative financial instruments recorded in the consolidated balance sheets were as follows: _ Balance Sheet Location March 31, 2021 March 31, 2020 Derivatives designated as hedges: Commodity derivatives Other current assets $ 0.5 $ - Commodity derivatives Other current liabilities - 1.3 Foreign exchange contracts Other current assets 0.1 0.1 Derivatives not designated as hedges: Foreign exchange contracts Other current liabilities $ - $ -
Derivative Financial Instruments Designated for Hedge Accounting	The amounts associated with derivative financial instruments that the Company designated for hedge accounting during the years ended March 31 were as follows: Gain (loss) recognized in other comprehensive income Statement of Operations Gain (loss) reclassified from AOCI 2021 2020 2019 Location 2021 2020 2019 Commodity derivatives $ 2.2 $ (2.6 ) $ (0.3 ) Cost of sales $ - $ (0.8 ) $ (0.4 ) Foreign exchange contracts - (0.1 ) (0.4 ) Net sales - (0.1 ) (0.4 ) Foreign exchange contracts (0.1 ) 0.2 1.0 Cost of sales (0.1 ) 0.4 0.6 Total gains (losses) $ 2.1 $ (2.5 ) $ 0.3 $ (0.1 ) $ (0.5 ) $ (0.2 )
Derivative Financial Instruments Not Designated for Hedge Accounting	The amounts associated with derivative financial instruments that the Company did not designate for hedge accounting were as follows: _ Years ended March 31, _ Statement of Operations Location 2021 2020 2019 Foreign exchange contracts Net sales $ - $ (0.1 ) $ (0.7 ) Foreign exchange contracts Other income (expense) - net 0.6 (0.1 ) (0.3 ) Total gains (losses) $ 0.6 $ (0.2 ) $ (1.0 )

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Mar. 31, 2021
Accumulated Other Comprehensive Loss [Abstract]
Accumulated Other Comprehensive Loss	Changes in accumulated other comprehensive loss were as follows: Foreign Currency Translation Defined Benefit Plans Cash Flow Hedges Total Balance, March 31, 2020 $ (61.4 ) $ (160.9 ) $ (1.0 ) $ (223.3 ) Other comprehensive income before reclassifications 30.4 33.8 2.1 66.3 Reclassifications: Amortization of unrecognized net loss (a) - 6.7 - 6.7 Realized losses - net (b) - - 0.1 0.1 Income taxes - (10.4 ) (0.6 ) (11.0 ) Total other comprehensive income 30.4 30.1 1.6 62.1 Balance, March 31, 2021 $ (31.0 ) $ (130.8 ) $ 0.6 $ (161.2 ) Foreign Currency Translation Defined Benefit Plans Cash Flow Hedges Total Balance, March 31, 2019 $ (42.6 ) $ (136.3 ) $ 0.5 $ (178.4 ) Other comprehensive loss before reclassifications (18.2 ) (38.7 ) (2.5 ) (59.4 ) Reclassifications: Amortization of unrecognized net loss (a) - 5.8 - 5.8 Realized losses - net (b) - - 0.5 0.5 Foreign currency translation gains (c) (0.6 ) - - (0.6 ) Income taxes - 8.3 0.5 8.8 Total other comprehensive loss (18.8 ) (24.6 ) (1.5 ) (44.9 ) Balance, March 31, 2020 $ (61.4 ) $ (160.9 ) $ (1.0 ) $ (223.3 ) (a) Amounts are included in the calculation of net periodic benefit cost for the Company’s defined benefit plans, which include pension and other postretirement plans. See Note 18 for additional information about the Company’s pension plans. (b) Amounts represent net gains and losses associated with cash flow hedges that were reclassified to net earnings. See Note 19 for additional information regarding derivative instruments. (c) As a result of the sale of its investment in NEX during fiscal 2020, the Company wrote off $0.6 million of accumulated foreign currency translation gains.

Segment and Geographic Inform_2

Segment and Geographic Information (Tables)	12 Months Ended
	Mar. 31, 2021
Segment and Geographic Information [Abstract]
Net Sales, Gross Profit, Operating Income and Total Assets by Segment	The following is a summary of net sales, gross profit, and operating income by segment. See Note 3 for additional information regarding net sales by primary end market. Year ended March 31, 2021 External Sales Inter-segment Sales Total Net sales: BHVAC $ 240.3 $ 0.3 $ 240.6 CIS 528.1 3.9 532.0 HDE 648.3 33.8 682.1 Automotive 391.7 6.6 398.3 Segment total 1,808.4 44.6 1,853.0 Corporate and eliminations - (44.6 ) (44.6 ) Net sales $ 1,808.4 $ - $ 1,808.4 Year ended March 31, 2020 External Sales Inter-segment Sales Total Net sales: BHVAC $ 219.4 $ 1.7 $ 221.1 CIS 620.1 3.8 623.9 HDE 693.8 52.1 745.9 Automotive 442.2 2.7 444.9 Segment total 1,975.5 60.3 2,035.8 Corporate and eliminations - (60.3 ) (60.3 ) Net sales $ 1,975.5 $ - $ 1,975.5 Year ended March 31, 2019 External Sales Inter-segment Sales Total Net sales: BHVAC $ 209.1 $ 3.3 $ 212.4 CIS 704.7 2.9 707.6 HDE 811.8 60.5 872.3 Automotive 487.1 1.8 488.9 Segment total 2,212.7 68.5 2,281.2 Corporate and eliminations - (68.5 ) (68.5 ) Net sales $ 2,212.7 $ - $ 2,212.7 Inter-segment sales are accounted for based upon an established markup over production costs. Net sales for Corporate and eliminations primarily represent the elimination of inter-segment sales. Years ended March 31, 2021 2020 2019 Gross profit: _ $’s % of sales _ $’s % of sales _ $’s % of sales BHVAC $ 83.0 34.5 % $ 71.5 32.3 % $ 63.4 29.9 % CIS 66.5 12.5 % 92.9 14.9 % 114.9 16.2 % HDE 88.4 13.0 % 96.6 13.0 % 127.8 14.7 % Automotive 56.0 14.1 % 48.4 10.9 % 59.0 12.1 % Segment total 293.9 15.9 % 309.4 15.2 % 365.1 16.0 % Corporate and eliminations (0.5 ) - (1.9 ) - 0.4 - Gross profit $ 293.4 16.2 % $ 307.5 15.6 % $ 365.5 16.5 % Years ended March 31, Operating income: 2021 2020 2019 BHVAC $ 47.2 $ 36.4 $ 26.9 CIS 8.2 32.9 53.4 HDE 36.8 37.8 65.0 Automotive (150.9 ) (10.0 ) (0.4 ) Segment total (58.7 ) 97.1 144.9 Corporate and eliminations (a) (39.0 ) (59.2 ) (35.2 ) Operating (loss) income $ (97.7 ) $ 37.9 $ 109.7 (a) The operating loss for Corporate includes certain research and development costs, legal, finance and other general corporate and central services expenses, and other costs that are either not directly attributable to an operating segment or not considered when management evaluates segment performance. During fiscal 2021, 2020 and 2019, the Company recorded $6.6 million, $39.2 million, and $7.1 million respectively, of costs directly associated with its review of strategic alternatives for the liquid-and air-cooled automotive businesses, including costs to separate and prepare the underlying businesses for potential sale. The following is a summary of total assets by segment: March 31, 2021 2020 BHVAC $ 110.8 $ 102.3 CIS 609.2 617.7 HDE 438.7 417.4 Automotive (a) 124.2 272.5 Corporate and eliminations (b) (6.2 ) 126.2 Total assets $ 1,276.7 $ 1,536.1 (a) During fiscal 2021, the Company recorded impairment charges totaling $166.8 million within the Automotive segment, primarily related to the property, plant and equipment of the liquid- and air-cooled automotive businesses, which are classified as held for sale as of March 31, 2021. See Note 2 for additional information. (b) At March 31, 2021, Corporate assets totaled $17.5 million and were more than offset by eliminations for intercompany balances, including accounts receivable. During fiscal 2021, the Company recorded income tax charges totaling $103.3 million, which established a full valuation allowance on deferred tax assets in the U.S that are recorded at Corporate. See Note 8 for additional information.
Capital Expenditures and Depreciation and Amortization Expense by Segment	The following is a summary of capital expenditures and depreciation and amortization expense by segment: Years ended March 31, Capital expenditures: 2021 2020 2019 BHVAC $ 1.5 $ 3.1 $ 1.3 CIS 6.1 15.0 16.4 HDE 13.5 31.5 29.4 Automotive 11.1 19.1 24.9 Corporate 0.5 2.6 1.9 Total capital expenditures $ 32.7 $ 71.3 $ 73.9 Years ended March 31, Depreciation and amortization expense: 2021 2020 2019 BHVAC $ 3.1 $ 3.4 $ 3.5 CIS 25.0 24.0 23.9 HDE 25.5 25.4 26.3 Automotive (a) 13.2 22.3 21.2 Corporate 1.8 2.0 2.0 Total depreciation and amortization $ 68.6 $ 77.1 $ 76.9 (a) Upon classifying the liquid- and air-cooled automotive businesses as held for sale, the Company ceased depreciating the long-lived assets within the disposal groups. See Note 2 for additional information.
Net Sales by Geographical Area	The following is a summary of net sales by geographical area, based upon the location of the selling unit: Years ended March 31, 2021 2020 2019 United States $ 765.7 $ 941.9 $ 1,032.3 China 217.6 168.5 172.1 Italy 188.6 187.4 217.3 Hungary 153.7 142.4 165.6 United Kingdom 96.4 82.0 86.6 Germany 83.4 97.5 123.1 Austria 59.6 93.0 116.2 Other 243.4 262.8 299.5 Net sales $ 1,808.4 $ 1,975.5 $ 2,212.7
Property, Plant and Equipment by Geographical Area	The following is a summary of property, plant and equipment by geographical area: March 31, 2021 2020 United States $ 80.3 $ 114.6 Mexico 43.5 50.0 China 31.3 56.8 Italy 30.0 49.8 Hungary 27.6 55.4 Germany 1.8 27.0 Austria - 26.0 Other 55.4 68.4 Total property, plant and equipment (a) $ 269.9 $ 448.0 (a) In connection with the pending sales of the liquid- and air-cooled automotive businesses within the Automotive segment, the Company wrote-down the carrying value of the disposal groups’ property, plant and equipment to zero as of March 31, 2021. The assets impaired were located in Hungary, Germany, Austria, China, the U.S., Italy, and the Netherlands. See Note 2 for additional information on the held for sale businesses and impairment charges recorded during fiscal 2021.

Significant Accounting Polici_4

Significant Accounting Policies, Chief Executive Officer Transition (Details) $ in Millions	12 Months Ended
	Mar. 31, 2021USD ($)
Chief Executive Officer [Member] | SG&A Expenses [Member]
Chief Executive Officer Transition [Abstract]
Employee severance and related benefits	$ 6.7

Significant Accounting Polici_5

Significant Accounting Policies, Sale of Facility in Germany (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Sale of Business [Abstract]
Gain (loss) on sale of assets	$ (0.7)	$ (0.6)	$ (0.9)
Automotive [Member]
Sale of Business [Abstract]
Selling price		6
Gain (loss) on sale of assets		$ 0.8

Significant Accounting Polici_6

Significant Accounting Policies, Sale of Nikkei Heat Exchanger Company, Ltd. (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Sale of Business [Abstract]
Equity in earnings of non-consolidated affiliate	[1]	$ 0	$ 0.2	$ 0.7
Nikkei Heat Exchanger Company, Ltd [Member]
Sale of Business [Abstract]
Ownership percentage			50.00%
Selling price			$ 3.8
Gain on write-off of accumulated foreign currency translation			0.6
Equity in earnings of non-consolidated affiliate			0.1	$ 0.7
Nikkei Heat Exchanger Company, Ltd [Member] | Other Income (Expense) [Member]
Sale of Business [Abstract]
Gain on sale of investment			$ 0.1
[1]	During fiscal 2020, the Company sold its ownership interest in Nikkei Heat Exchanger Company, Ltd. As a result of the sale, the Company recorded a gain of $0.1 million, which is included within the fiscal 2020 amount.  See Note 1 for additional information.

Significant Accounting Polici_7

Significant Accounting Policies, Sale of AIAC Air Conditioning South Africa (Pty) Ltd (Details) - AIAC Air Conditioning South Africa (Pty) Ltd [Member] $ in Millions	12 Months Ended
	Mar. 31, 2019USD ($)
Sale of Business [Abstract]
Selling price	$ 0.5
Loss on sale of assets	(1.7)
Loss on write-off of accumulated foreign currency translation	(0.8)
Maximum [Member]
Sale of Business [Abstract]
Annual net sales attributable to disposed business	$ 2

Significant Accounting Polici_8

Significant Accounting Policies, Trade Accounts Receivable (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Trade Accounts Receivable [Abstract]
Trade receivables, allowance for credit losses	$ (1.3)	$ (1.9)
Trade receivables sold without recourse	88.7	75.4	$ 85.1
Loss on the sale of accounts receivables	$ (0.2)	$ (0.5)	$ (0.6)

Significant Accounting Polici_9

Significant Accounting Policies, Tooling and Research and Development (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Tooling [Abstract]
Property, plant and equipment - net	[1]	$ 269.9	$ 448
Customer owned tooling receivable		8.1	7.8
Research and Development [Abstract]
Research and development cost		46.3	59.5	$ 69.8
Held for Sale [Member]
Tooling [Abstract]
Customer owned tooling receivable		$ 5.6
Tooling [Member]
Tooling [Abstract]
Property, plant and equipment, depreciable lives		3 years
Property, plant and equipment - net		$ 14.1	$ 23.3
[1]	In connection with the pending sales of the liquid- and air-cooled automotive businesses within the Automotive segment, the Company wrote-down the carrying value of the disposal groups’ property, plant and equipment to zero as of March 31, 2021.  The assets impaired were located in Hungary, Germany, Austria, China, the U.S., Italy, and the Netherlands.  See Note 2 for additional information on the held for sale businesses and impairment charges recorded during fiscal 2021.

Significant Accounting Polic_10

Significant Accounting Policies, Short-term Investments, Property, Plant and Equipment and Assets Held for Sale (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Short-Term Investments [Abstract]
Short-term investments	$ 3.7	$ 3.2
Property, Plant and Equipment [Abstract]
Accrued capital expenditures	7.9	8.7	$ 17.9
Assets Held For Sale [Abstract]
Impairment charges	166.8	$ 8.6	$ 0.4
Held for Sale [Member]
Assets Held For Sale [Abstract]
Impairment charges	166.8
Liabilities Held for Sale [Member]
Property, Plant and Equipment [Abstract]
Accrued capital expenditures	$ 2.7

Significant Accounting Polic_11

Significant Accounting Policies, Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Supplemental Cash Flow Information [Abstract]
Interest paid	$ 17.9	$ 21.4	$ 22.3
Income taxes paid	$ 19.7	$ 18.8	$ 22.2

Significant Accounting Polic_12

Significant Accounting Policies, Leases (Details) $ in Millions	Mar. 31, 2021USD ($)	Mar. 31, 2020USD ($)	Mar. 31, 2019USD ($)Lease
Leases [Abstract]
Right-of-use assets	$ 54.1	$ 61.4
Operating lease liabilities, current	$ 11.2	$ 10.9
Operating lease liabilities, current, Statement of Financial Position [Extensible List]	Other Liabilities, Current	Other Liabilities, Current
Operating lease liabilities, noncurrent	$ 44.8	$ 50.3
Operating lease liabilities, noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Operating lease liabilities	$ 56
Lease Accounting Guidance [Member]
Leases [Abstract]
Right-of-use assets			$ 61.3
Operating lease liabilities, current			$ 12.4
Operating lease liabilities, current, Statement of Financial Position [Extensible List]			Other Liabilities, Current
Operating lease liabilities, noncurrent			$ 48.9
Operating lease liabilities, noncurrent, Statement of Financial Position [Extensible List]			Other Liabilities, Noncurrent
Lease Accounting Guidance [Member] | Build-to-Suit Arrangements [Member]
Leases [Abstract]
Right-of-use assets			$ 5.2
Operating lease liabilities			$ 5.2
Number of operating leases | Lease			2

Significant Accounting Polic_13

Significant Accounting Policies, New Accounting Guidance (Details) - USD ($) $ in Millions	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2018
New Accounting Guidance [Abstract]
Retained earnings	$ 259.2	$ 469.9
ASU 2014-09 [Member] | Maximum [Member]
New Accounting Guidance [Abstract]
Retained earnings			$ 0.7
ASU 2016-16 [Member]
New Accounting Guidance [Abstract]
Retained earnings			$ (8.3)

Assets Held for Sale (Details)

Assets Held for Sale (Details) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Nov. 02, 2020
Assets Held for Sale [Abstract]
Impairment charges		$ 166,800,000	$ 8,600,000	$ 400,000
ASSETS [Abstract]
Total assets held for sale		107,600,000	0
LIABILITIES [Abstract]
Total liabilities held for sale		103,300,000	0
Automotive [Member]
Assets Held for Sale [Abstract]
Selling price			$ 6,000,000
Impairment charges		1,700,000
Held for Sale [Member]
Assets Held for Sale [Abstract]
Impairment charges		166,800,000
Liquid and Air-Cooled Automotive Businesses [Member]
Assets Held for Sale [Abstract]
Impairment charges		165,100,000
LIABILITIES [Abstract]
Pensions		17,800,000
Liquid and Air-Cooled Automotive Businesses [Member] | Held for Sale [Member]
ASSETS [Abstract]
Cash and cash equivalents		8,000,000
Trade accounts receivables - net		54,400,000
Inventories		24,700,000
Other current assets		12,800,000
Property, plant and equipment - net		164,000,000
Other noncurrent assets		8,800,000
Impairment of carrying value		(165,100,000)
Total assets held for sale		107,600,000
LIABILITIES [Abstract]
Short-term debt		5,000,000
Accounts payable		46,300,000
Accrued compensation and employee benefits		15,500,000
Other current liabilities		12,200,000
Pensions		17,800,000
Other noncurrent liabilities		6,500,000
Total liabilities held for sale		103,300,000
Liquid-Cooled Automotive Business [Member]
Assets Held for Sale [Abstract]
Selling price					$ 1
Impairment charges		138,300,000
Long-lived assets		0
Liquid-Cooled Automotive Business [Member] | Forecast [Member] | Minimum [Member]
LIABILITIES [Abstract]
Loss on sale of transaction	$ 20,000,000
Liquid-Cooled Automotive Business [Member] | Forecast [Member] | Maximum [Member]
LIABILITIES [Abstract]
Loss on sale of transaction	30,000,000
Air-Cooled Automotive Business [Member]
Assets Held for Sale [Abstract]
Impairment charges		$ 26,800,000
Air-Cooled Automotive Business [Member] | Forecast [Member]
LIABILITIES [Abstract]
Loss on sale of transaction	$ 6,000,000

Revenue Recognition, Disaggrega

Revenue Recognition, Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Abstract]
Net sales	$ 1,808.4	$ 1,975.5	$ 2,212.7
Contract Balances [Abstract]
Contract assets	5.7	21.7
Contract liabilities	5.6	5.6
Decrease in contract assets	(16)
Liquid and Air-Cooled Automotive Businesses [Member]
Contract Balances [Abstract]
Contract assets	7.1
Liquid and Air-Cooled Automotive Businesses [Member] | Held for Sale [Member]
Contract Balances [Abstract]
Contract liabilities	2.9
Total Segments [Member]
Disaggregation of Revenue [Abstract]
Net sales	1,853	2,035.8	2,281.2
Total Segments [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	1,780.4	1,899.3	2,101.5
Total Segments [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	72.6	136.5	179.7
Total Segments [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	851.1	1,039.8	1,152.5
Total Segments [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	731.4	776.8	879.1
Total Segments [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	270.5	219.2	249.6
Total Segments [Member] | Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	602.2	639.7	674
Total Segments [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	106	150.2	187
Total Segments [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	55.4	43.5	47.8
Total Segments [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	264.8	323.7	387.6
Total Segments [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	264.1	253.9	314.1
Total Segments [Member] | Automotive and Light Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	455.7	508.8	542.8
Total Segments [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	104.8	116	127.9
BHVAC [Member]
Disaggregation of Revenue [Abstract]
Net sales	240.6	221.1	212.4
BHVAC [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	240.6	221.1	212.4
BHVAC [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
BHVAC [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	144.2	139.1	124.9
BHVAC [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	96.4	82	87.5
BHVAC [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
BHVAC [Member] | Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	181.6	176.6	167.7
BHVAC [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	58.7	42.7	41.3
BHVAC [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
BHVAC [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
BHVAC [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
BHVAC [Member] | Automotive and Light Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
BHVAC [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.3	1.8	3.4
CIS [Member]
Disaggregation of Revenue [Abstract]
Net sales	532	623.9	707.6
CIS [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	486.3	518.2	571.1
CIS [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	45.7	105.7	136.5
CIS [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	267.7	345.9	413.6
CIS [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	219.8	232.6	244.8
CIS [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	44.5	45.4	49.2
CIS [Member] | Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	420.6	463.1	506.3
CIS [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	47.3	107.5	145.7
CIS [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	55.4	43.5	47.8
CIS [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
CIS [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
CIS [Member] | Automotive and Light Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
CIS [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	8.7	9.8	7.8
HDE [Member]
Disaggregation of Revenue [Abstract]
Net sales	682.1	745.9	872.3
HDE [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	655.2	715.1	829.1
HDE [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	26.9	30.8	43.2
HDE [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	388.2	484.5	543
HDE [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	133.2	141.2	177.4
HDE [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	160.7	120.2	151.9
HDE [Member] | Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
HDE [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
HDE [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
HDE [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	250.4	302.1	352.6
HDE [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	260.7	240.8	298.1
HDE [Member] | Automotive and Light Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	97.9	108.4	116.7
HDE [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	73.1	94.6	104.9
Automotive [Member]
Disaggregation of Revenue [Abstract]
Net sales	398.3	444.9	488.9
Automotive [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	398.3	444.9	488.9
Automotive [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
Automotive [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	51	70.3	71
Automotive [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	282	321	369.4
Automotive [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	65.3	53.6	48.5
Automotive [Member] | Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
Automotive [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
Automotive [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0	0	0
Automotive [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	14.4	21.6	35
Automotive [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	3.4	13.1	16
Automotive [Member] | Automotive and Light Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	357.8	400.4	426.1
Automotive [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	$ 22.7	$ 9.8	$ 11.8
Maximum [Member]
Revenue Recognition [Abstract]
Period of time after billing when payment is received	90 days

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Fair Value Measurements [Abstract]
Investments	$ 2.8	$ 3.8
Deferred compensation obligations	2.8	3.8
Decrease in fair value of investments	$ (1)
Notice period for redeeming real estate investment funds	90 days
Notice period for redeeming fixed income investment funds	60 days
U.S. Pension Plans [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	$ 183.3	131.1	$ 155.1
U.S. Pension Plans [Member] | Money Market Investments [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	2.5	2.4
U.S. Pension Plans [Member] | Fixed Income Securities [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	8.9	8.7
U.S. Pension Plans [Member] | Pooled Equity Funds [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	37.3	17.9
U.S. Pension Plans [Member] | U.S. Government and Agency Securities [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	14.5	13.1
U.S. Pension Plans [Member] | Other [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	1.1	0.8
U.S. Pension Plans [Member] | Total [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	64.3	42.9
U.S. Pension Plans [Member] | Level 1 [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	37.4	18
U.S. Pension Plans [Member] | Level 1 [Member] | Money Market Investments [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	0	0
U.S. Pension Plans [Member] | Level 1 [Member] | Fixed Income Securities [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	0	0
U.S. Pension Plans [Member] | Level 1 [Member] | Pooled Equity Funds [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	37.3	17.9
U.S. Pension Plans [Member] | Level 1 [Member] | U.S. Government and Agency Securities [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	0	0
U.S. Pension Plans [Member] | Level 1 [Member] | Other [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	0.1	0.1
U.S. Pension Plans [Member] | Level 2 [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	26.9	24.9
U.S. Pension Plans [Member] | Level 2 [Member] | Money Market Investments [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	2.5	2.4
U.S. Pension Plans [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	8.9	8.7
U.S. Pension Plans [Member] | Level 2 [Member] | Pooled Equity Funds [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	0	0
U.S. Pension Plans [Member] | Level 2 [Member] | U.S. Government and Agency Securities [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	14.5	13.1
U.S. Pension Plans [Member] | Level 2 [Member] | Other [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	1	0.7
U.S. Pension Plans [Member] | Level 3 [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	0	0
U.S. Pension Plans [Member] | Net Asset Value [Member]
Fair Value Measurements [Abstract]
Fair value of plan assets	$ 119	$ 88.2

Stock-Based Compensation, Incen

Stock-Based Compensation, Incentive Compensation Plan (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Stock-Based Compensation [Abstract]
Stock-based compensation expense	$ 6.3	$ 6.6	$ 7.9
2020 Incentive Compensation Plan [Member]
Stock-Based Compensation [Abstract]
Number of shares available for grant (in shares)	1.7

Stock-Based Compensation, Stock

Stock-Based Compensation, Stock Options (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Compensation Expense [Abstract]
Stock-based compensation expense	$ 6.3	$ 6.6	$ 7.9
Stock Options [Member]
Compensation Expense [Abstract]
Stock-based compensation expense	0.9	1.3	1.2
Fair value of awards vesting	1.3	$ 1.2	$ 1.2
Unrecognized compensation costs	$ 1.8
Weighted average period recognized	2 years 9 months 18 days
Assumptions for Stock Awards Granted [Abstract]
Fair value of options (in dollars per share)	$ 3.46	$ 5.56	$ 7.81
Expected life of awards in years	6 years 1 month 6 days	6 years 3 months 18 days	6 years 3 months 18 days
Risk-free interest rate	0.40%	2.20%	2.80%
Expected volatility of the Company's stock	54.10%	39.20%	39.70%
Expected dividend yield on the Company's stock	0.00%	0.00%	0.00%
Award vesting period	4 years
Stock Options Activity [Rollforward]
Outstanding, beginning (in shares)	1.4
Granted (in shares)	0.4
Exercised (in shares)	(0.4)
Forfeited or expired (in shares)	(0.3)
Outstanding, ending (in shares)	1.1	1.4
Exercisable, ending (in shares)	0.5
Weighted Average Exercise Price [Rollforward]
Outstanding, beginning (in dollars per share)	$ 12.49
Granted (in dollars per share)	6.88
Exercised (in dollars per share)	10.56
Forfeited or expired (in dollars per share)	10.94
Outstanding, ending (in dollars per share)	11.63	$ 12.49
Exercisable, ending (in dollars per share)	$ 13.80
Summary of Stock Option Activity [Abstract]
Options, Outstanding, Weighted average remaining contractual term	7 years 1 month 6 days
Options, Outstanding, Aggregate intrinsic value	$ 3.9
Options, Exercisable, Weighted average remaining contractual term	5 years 1 month 6 days
Options, Exercisable, Aggregate intrinsic value	$ 0.9
Additional Information Related to Stock Options Exercised [Abstract]
Intrinsic value of stock options exercised	1.4	$ 0.1	$ 0.7
Proceeds from stock options exercised	$ 4.1	$ 0.1	$ 1.1
Stock Options [Member] | Maximum [Member]
Assumptions for Stock Awards Granted [Abstract]
Stock option term	10 years
Stock Options [Member] | Tranche One [Member]
Assumptions for Stock Awards Granted [Abstract]
Annual vesting percentage	25.00%
Stock Options [Member] | Tranche Two [Member]
Assumptions for Stock Awards Granted [Abstract]
Annual vesting percentage	25.00%
Stock Options [Member] | Tranche Three [Member]
Assumptions for Stock Awards Granted [Abstract]
Annual vesting percentage	25.00%
Stock Options [Member] | Tranche Four [Member]
Assumptions for Stock Awards Granted [Abstract]
Annual vesting percentage	25.00%

Stock-Based Compensation, Restr

Stock-Based Compensation, Restricted Stock (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Compensation Expense [Abstract]
Stock-based compensation expense	$ 6.3	$ 6.6	$ 7.9
Restricted Stock [Member]
Restricted Stock Activity [Roll Forward]
Non-vested balance, beginning (in shares)	0.5
Granted (in shares)	0.8
Vested (in shares)	(0.5)
Forfeited (in shares)	(0.1)
Non-vested balance, ending (in shares)	0.7	0.5
Weighted Average Price [Rollforward]
Non-vested balance, beginning (in dollars per share)	$ 14.48
Granted (in dollars per share)	7.53
Vested (in dollars per share)	9.64
Forfeited (in dollars per share)	13.40
Non-vested balance, ending (in dollars per share)	$ 10.05	$ 14.48
Compensation Expense [Abstract]
Stock-based compensation expense	$ 4.3	$ 4.5	4.3
Fair value of awards vesting	4.5	4.4	4.3
Unrecognized compensation costs	$ 6.1
Weighted average period recognized	2 years 8 months 12 days
Assumptions for Stock Awards Granted [Abstract]
Award vesting period	4 years
Restricted Stock [Member] | Tranche One [Member]
Assumptions for Stock Awards Granted [Abstract]
Annual vesting percentage	25.00%
Restricted Stock [Member] | Tranche Two [Member]
Assumptions for Stock Awards Granted [Abstract]
Annual vesting percentage	25.00%
Restricted Stock [Member] | Tranche Three [Member]
Assumptions for Stock Awards Granted [Abstract]
Annual vesting percentage	25.00%
Restricted Stock [Member] | Tranche Four [Member]
Assumptions for Stock Awards Granted [Abstract]
Annual vesting percentage	25.00%
Performance Stock Awards [Member]
Compensation Expense [Abstract]
Stock-based compensation expense	$ 1.1	$ 0.8	$ 2.4
Unrecognized compensation costs	$ 0.5
Weighted average period recognized	1 year
Assumptions for Stock Awards Granted [Abstract]
Award vesting period	3 years
Performance period	3 years
Period of time to average cash flow return on invested capital	3 years
Period of time to average revenue growth	3 years

Restructuring Activities (Detai

Restructuring Activities (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Restructuring and Repositioning Expenses [Abstract]
Employee severance and related benefits	$ 11.7	$ 10.2	$ 8.7
Other restructuring and repositioning expenses	1.7	2	0.9
Total	13.4	12.2	9.6
Changes in Accrued Severance [Roll Forward]
Beginning balance	5	10
Additions	11.7	10.2
Payments	(10.5)	(15.1)
Reclassified as held for sale	(2.5)	0
Effect of exchange rate changes	0.3	(0.1)
Ending balance	4	5	10
CIS [Member]
Restructuring and Repositioning Expenses [Abstract]
Employee severance and related benefits	3.7
Changes in Accrued Severance [Roll Forward]
Asset impairment charges		0.6	$ 0.4
Automotive [Member]
Changes in Accrued Severance [Roll Forward]
Asset impairment charges	166.8	$ 7.5
Corporate [Member]
Restructuring and Repositioning Expenses [Abstract]
Employee severance and related benefits	$ 1.3

Other Income and Expense (Detai

Other Income and Expense (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Other Income and Expense [Abstract]
Interest income		$ 0.5	$ 0.4	$ 0.4
Foreign currency transactions	[1]	0.6	(2.4)	(2.3)
Net periodic benefit cost	[2]	(3.3)	(3)	(2.9)
Equity in earnings of non-consolidated affiliate	[3]	0	0.2	0.7
Total other expense - net		$ (2.2)	(4.8)	(4.1)
Nikkei Heat Exchanger Company, Ltd [Member]
Other Income and Expense [Abstract]
Equity in earnings of non-consolidated affiliate			0.1	$ 0.7
Other Income and Expenses [Abstract]
Gain on sale of ownership interest			$ 0.1
[1]	Foreign currency transactions primarily consist of foreign currency transaction gains and losses on the re-measurement or settlement of foreign currency-denominated assets and liabilities, including intercompany loans and transactions denominated in a foreign currency, along with gains and losses on foreign currency exchange contracts.
[2]	Net periodic benefit cost for the Company’s pension and postretirement plans is exclusive of service cost.
[3]	During fiscal 2020, the Company sold its ownership interest in Nikkei Heat Exchanger Company, Ltd. As a result of the sale, the Company recorded a gain of $0.1 million, which is included within the fiscal 2020 amount.  See Note 1 for additional information.

Income Taxes, Earnings (Loss) B

Income Taxes, Earnings (Loss) Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Earnings (Loss) Before Income Taxes [Abstract]
United States	$ (48.7)	$ (26.1)	$ 22.4
Foreign	(70.6)	36.5	58.4
(Loss) earnings before income taxes	$ (119.3)	$ 10.4	$ 80.8

Income Taxes, Income Tax Provis

Income Taxes, Income Tax Provision (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Federal [Abstract]
Current	$ (0.1)	$ (3.4)	$ (20.4)
Deferred	58.3	(1.7)	(4.2)
State [Abstract]
Current	0.4	(0.1)	0.7
Deferred	9.2	(2.3)	1.9
Foreign [Abstract]
Current	22	14.9	19
Deferred	0.4	5	(2.1)
Total income tax provision (benefit)	$ 90.2	$ 12.4	$ (5.1)

Income Taxes, Reconciliation of

Income Taxes, Reconciliation of U.S. Federal Statutory Rate to Effective Tax Rate (Details)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Reconciliation of federal statutory income tax rate to company's effective income tax rate [Abstract]
Statutory federal tax	21.00%	21.00%	21.00%
State taxes, net of federal benefit	0.90%	(12.00%)	3.60%
Taxes on non-U.S. earnings and losses	(9.10%)	32.90%	3.90%
Valuation allowances	(92.90%)	156.90%	4.00%
Tax credits	2.20%	(36.70%)	(26.10%)
Compensation	(1.30%)	4.00%	(0.10%)
Tax rate or law changes	(0.20%)	3.60%	(12.00%)
Uncertain tax positions, net of settlements	0.10%	(37.90%)	0.40%
Notional interest deductions	1.30%	(12.50%)	(2.50%)
Dividends and taxable foreign inclusions	3.00%	(11.00%)	1.60%
Other	(0.60%)	10.90%	(0.10%)
Effective tax rate	(75.60%)	119.20%	(6.30%)

Income Taxes, Unrecognized Tax

Income Taxes, Unrecognized Tax Benefits and Deferred Tax Asset Valuation Allowances (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Income Taxes [Abstract]
Increase (decrease) in deferred tax asset valuation allowances	$ 22	$ 9.2
Income tax benefit from allocation of income tax provision	(9.3)
Income tax expense related to legal entity restructuring		2.9
Lapse of statute of limitations and settlements		4.5
Income tax benefit related to manufacturing deduction			$ (2.5)
Income tax benefit related to US Tax Reform			(7.7)
Reduction in provisional charge related to US Tax Reform			(9.3)
Transition tax liability			18.9
Reduction in transition tax liability			(0.1)
Charge for reduction in state deferred tax assets			1.7
Changes in deferred tax asset valuation allowance related to US Tax Reform			4.3
Lapse of statute of limitations	(0.5)	(2.4)	(2.2)
Income Taxes [Abstract]
Tax benefit from recognition of tax credits			(14.5)
U.S. [Member]
Income Taxes [Abstract]
Income tax benefit from impairment charges	$ (24.4)
Increase (decrease) in deferred tax asset valuation allowances		8.4
Term of cumulative loss position	3 years
Foreign Jurisdictions [Member]
Income Taxes [Abstract]
Income tax benefit from impairment charges	$ (13.3)
Increase (decrease) in deferred tax asset valuation allowances		(1.3)	$ (1)
Term of cumulative loss position	3 years
Italy [Member]
Income Taxes [Abstract]
Tax benefit from recognition of tax credits		$ (1.4)
Deferred Tax Assets for Charges Recorded [Member]
Income Taxes [Abstract]
Increase (decrease) in deferred tax asset valuation allowances	$ 116.5
Deferred Tax Assets for Charges Recorded [Member] | U.S. [Member]
Income Taxes [Abstract]
Increase (decrease) in deferred tax asset valuation allowances	103.3
Deferred Tax Assets for Charges Recorded [Member] | Foreign Jurisdictions [Member]
Income Taxes [Abstract]
Increase (decrease) in deferred tax asset valuation allowances	$ 13.2

Income Taxes, Deferred Tax Asse

Income Taxes, Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2021	Mar. 31, 2020
Deferred tax assets [Abstract]
Accounts receivable	$ 0.3	$ 0.3
Inventories	4.5	4.5
Plant and equipment	7.5	4.7
Lease liabilities	14	15.7
Pension and employee benefits	24	45.1
Net operating and capital losses	52.7	70.2
Credit carryforwards	51.8	56.8
Other, principally accrued liabilities	8.9	8.1
Total gross deferred tax assets	163.7	205.4
Less: valuation allowances	(90.7)	(46.9)
Net deferred tax assets	73	158.5
Deferred tax liabilities [Abstract]
Plant and equipment	9.8	13.1
Lease assets	13.8	15.6
Goodwill	5.1	4.8
Intangible assets	25.1	26.4
Other	0.6	1.9
Total gross deferred tax liabilities	54.4	61.8
Net deferred tax asset	$ 18.6	$ 96.7

Income Taxes, Unrecognized Ta_2

Income Taxes, Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Beginning balance	$ 9.6	$ 9.7	$ 13.8
Gross increases - tax positions in prior period		0.1	0.3
Gross decreases - tax positions in prior period		(0.6)	(1)
Gross increases - tax positions in current period		0.9	1.1
Settlements		0	(2.1)
Lapse of statute of limitations		(0.5)	(2.4)	$ (2.2)
Ending balance		9.6	9.7	$ 13.8
Unrecognized tax benefits that would impact effective tax rate		1.5
Lapse of statute of limitations and settlements			4.5
Unrecognized tax benefits accrued interest and penalties		$ 0.6	$ 0.5
Forecast [Member]
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Lapse of statute of limitations and settlements	$ 2.4

Income Taxes, Tax Years Subject

Income Taxes, Tax Years Subject to Examination, Tax Credits and Tax Carryforwards (Details) $ in Millions	12 Months Ended
	Mar. 31, 2021USD ($)
Income Taxes [Abstract]
Unrecognized foreign withholding taxes and deferred tax liabilities	$ 10
Federal and State [Member]
Income Taxes [Abstract]
Tax credit carryforward	$ 60.5
Federal and State [Member] | Minimum [Member]
Income Taxes [Abstract]
Tax credit carryforward, expiration date	Mar. 31, 2022
Federal and State [Member] | Maximum [Member]
Income Taxes [Abstract]
Tax credit carryforward, expiration date	Mar. 31, 2041
Germany [Member]
Income Taxes [Abstract]
Tax years subject to examination	Fiscal 2015 - Fiscal 2020
Italy [Member]
Income Taxes [Abstract]
Tax years subject to examination	Fiscal 2016 - Fiscal 2020
United States [Member]
Income Taxes [Abstract]
Tax years subject to examination	Fiscal 2017 - Fiscal 2020
Foreign Tax Jurisdictions [Member]
Income Taxes [Abstract]
Tax loss carryforwards	$ 211.4
Tax losses subject to expiration	6.8
Tax losses not subject to expiration	$ 204.6
Foreign Tax Jurisdictions [Member] | Minimum [Member]
Income Taxes [Abstract]
Tax loss carryforwards, expiration date	Mar. 31, 2022
Foreign Tax Jurisdictions [Member] | Maximum [Member]
Income Taxes [Abstract]
Tax loss carryforwards, expiration date	Mar. 31, 2034
State and Local [Member]
Income Taxes [Abstract]
Tax loss carryforwards	$ 135.8
State and Local [Member] | Minimum [Member]
Income Taxes [Abstract]
Tax loss carryforwards, expiration date	Mar. 31, 2022
State and Local [Member] | Maximum [Member]
Income Taxes [Abstract]
Tax loss carryforwards, expiration date	Mar. 31, 2041

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Basic Earnings Per Share [Abstract]
Net (loss) earnings attributable to Modine	$ (210.7)	$ (2.2)	$ 84.8
Less: Undistributed earnings attributable to unvested shares	0	0	(0.4)
Net (loss) earnings available to Modine shareholders	$ (210.7)	$ (2.2)	$ 84.4
Weighted-average shares outstanding - basic (in shares)	51.3	50.8	50.5
Net (loss) earnings per share - basic (in dollars per share)	$ (4.11)	$ (0.04)	$ 1.67
Diluted Earnings Per Share [Abstract]
Net (loss) earnings attributable to Modine	$ (210.7)	$ (2.2)	$ 84.8
Less: Undistributed earnings attributable to unvested shares	0	0	(0.2)
Net (loss) earnings available to Modine shareholders	$ (210.7)	$ (2.2)	$ 84.6
Weighted-average shares outstanding - basic (in shares)	51.3	50.8	50.5
Effect of dilutive securities (in shares)	0	0	0.8
Weighted-average shares outstanding - diluted (in shares)	51.3	50.8	51.3
Net (loss) earnings per share - diluted (in dollars per share)	$ (4.11)	$ (0.04)	$ 1.65
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]
Potentially dilutive securities not included in computation of diluted net loss per share (in shares)	0.2	0.3
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earning per share (in shares)	1	1.1	0.4
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earning per share (in shares)	0.4	0.5	0.3

Cash, Cash Equivalents and Re_3

Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Cash, Cash Equivalents and Restricted Cash [Abstract]
Cash and cash equivalents	$ 37.8	$ 70.9
Restricted cash	0.1	0.4
Cash and restricted cash held for sale	8.2	0
Total cash, cash equivalents, restricted cash and cash held for sale	$ 46.1	$ 71.3	$ 42.2	$ 40.3

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2021	Mar. 31, 2020
Inventories [Abstract]
Raw materials	$ 117.1	$ 123.6
Work in process	38.5	34.6
Finished goods	40	49.2
Total inventories	$ 195.6	$ 207.4

Property, Plant and Equipment_2

Property, Plant and Equipment (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment		$ 943.4	$ 1,302.4
Less: accumulated depreciation		(673.5)	(854.4)
Net property, plant and equipment	[1]	269.9	448
Depreciation expense		60.1	68.2	$ 67.9
Loss from disposition of property, plant and equipment		(0.7)	(0.6)	$ (0.9)
Land [Member]
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment		16.4	19.7
Buildings and Improvements [Member]
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment		$ 203.5	276.7
Buildings and Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, depreciable lives		10 years
Buildings and Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, depreciable lives		40 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment		$ 623.2	870.3
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, depreciable lives		3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, depreciable lives		15 years
Office Equipment [Member]
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment		$ 81.3	95.2
Office Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, depreciable lives		3 years
Office Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, depreciable lives		10 years
Construction in Progress [Member]
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment		$ 19	$ 40.5
[1]	In connection with the pending sales of the liquid- and air-cooled automotive businesses within the Automotive segment, the Company wrote-down the carrying value of the disposal groups’ property, plant and equipment to zero as of March 31, 2021.  The assets impaired were located in Hungary, Germany, Austria, China, the U.S., Italy, and the Netherlands.  See Note 2 for additional information on the held for sale businesses and impairment charges recorded during fiscal 2021.

Intangible Assets (Details)

Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Intangible Assets [Abstract]
Gross carrying value	$ 138.2	$ 142.7
Accumulated amortization	(37.6)	(36.4)
Net intangible assets	100.6	106.3
Amortization expense	8.5	8.9	$ 9
Estimated Future Amortization Expense [Abstract]
Fiscal 2022	8.4
Fiscal 2023	8
Fiscal 2024	8
Fiscal 2025	8
Fiscal 2026	8
Customer Relationships [Member]
Intangible Assets [Abstract]
Gross carrying value	62.8	60.8
Accumulated amortization	(16.9)	(12.6)
Net intangible assets	45.9	48.2
Trade Names [Member]
Intangible Assets [Abstract]
Gross carrying value	51.5	58.3
Accumulated amortization	(11.4)	(16.2)
Net intangible assets	40.1	42.1
Acquired Technology [Member]
Intangible Assets [Abstract]
Gross carrying value	23.9	23.6
Accumulated amortization	(9.3)	(7.6)
Net intangible assets	$ 14.6	$ 16

Goodwill (Details)

Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Goodwill [Roll Forward]
Beginning balance	$ 166.1	$ 168.5
Impairment charge		(0.5)
Effect of exchange rate changes	4.6	(1.9)
Ending balance	170.7	166.1
BHVAC [Member]
Goodwill [Roll Forward]
Beginning balance	13.5	14.1
Impairment charge		0
Effect of exchange rate changes	1.3	(0.6)
Ending balance	14.8	13.5
CIS [Member]
Goodwill [Roll Forward]
Beginning balance	152.6	153.9
Impairment charge		0
Effect of exchange rate changes	3.3	(1.3)
Ending balance	155.9	152.6
Automotive [Member]
Goodwill [Roll Forward]
Beginning balance	0	0.5
Impairment charge		(0.5)
Effect of exchange rate changes	0	0
Ending balance	0	0
Accumulated impairment losses	9.2	9.2
HDE [Member]
Goodwill [Roll Forward]
Accumulated impairment losses	$ 31.6	$ 31.6

Product Warranties and Other _3

Product Warranties and Other Commitments (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Changes in accrued warranty costs [Roll Forward]
Beginning balance	$ 7.9	$ 9.2
Warranties recorded at time of sale	5.5	5.3
Adjustments to pre-existing warranties	(0.9)	(1.6)
Settlements	(5.6)	(4.8)
Reclassified as held for sale	(2)	0
Effect of exchange rate changes	0.3	(0.2)
Ending balance	$ 5.2	$ 7.9
Minimum [Member]
Product Warranties [Abstract]
Product warranty period	1 year
Indemnification Agreements [Abstract]
Indemnification period	1 year
Maximum [Member]
Product Warranties [Abstract]
Product warranty period	5 years
Indemnification Agreements [Abstract]
Indemnification period	15 years
Capital Expenditures [Member]
Commitments [Abstract]
Commitment amount	$ 10

Leases (Details)

Leases (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Lease Assets and Liabilities [Abstract]
Operating lease ROU assets		$ 54.1	$ 61.4
Operating lease ROU assets, Statement of Financial Position [Extensible List]		Other Assets, Noncurrent	Other Assets, Noncurrent
Finance lease ROU assets		$ 8.3	$ 8.5
Finance lease ROU assets, Statement of Financial Position [Extensible List]		Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Operating lease liabilities, current		$ 11.2	$ 10.9
Operating lease liabilities, current, Statement of Financial Position [Extensible List]		Other Liabilities, Current	Other Liabilities, Current
Operating lease liabilities, noncurrent		$ 44.8	$ 50.3
Operating lease liabilities, noncurrent, Statement of Financial Position [Extensible List]		Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Finance lease liabilities, current		$ 0.4	$ 0.4
Finance lease liabilities, current, Statement of Financial Position [Extensible List]		Long-term Debt and Lease Obligation, Current	Long-term Debt and Lease Obligation, Current
Finance lease liabilities, noncurrent		$ 3.2	$ 3.3
Finance lease liabilities, noncurrent, Statement of Financial Position [Extensible List]		Long-term Debt and Lease Obligation	Long-term Debt and Lease Obligation
Accumulated amortization		$ 2.4	$ 1.8
Components of Lease Expense [Abstract]
Operating lease expense	[1]	19.5	21.2
Finance lease expense [Abstract]
Depreciation of ROU assets		0.5	0.5
Interest on lease liabilities		0.2	0.2
Total lease expense		20.2	21.9
Short-term lease expense		3.5	4.1
Cash paid for amounts included in measurement of lease liabilities [Abstract]
Operating cash flows for operating leases		14.2	14.7
Financing cash flows for finance leases		0.6	0.5
ROU assets obtained in exchange for lease liabilities [Abstract]
Operating leases		9.8	9
Finance leases		$ 0.1	$ 0.2
Weighted-average remaining lease term [Abstract]
Operating leases		6 years 10 months 24 days	9 years 3 months 18 days
Finance leases		7 years 9 months 18 days	8 years 9 months 18 days
Weighted-average discount rate [Abstract]
Operating leases		3.30%	3.50%
Finance leases		4.70%	4.70%
Maturity of Operating Lease Liabilities [Abstract]
2022		$ 12.8
2023		10.9
2024		8.1
2025		6.7
2026		6.1
2027 and beyond		18.5
Total lease payments		63.1
Less: Interest		(7.1)
Present value of lease liabilities		56
Maturities of Finance Lease Liabilities [Abstract]
2022		0.6
2023		0.6
2024		0.6
2025		0.6
2026		0.5
2027 and beyond		1.4
Total lease payments		4.3
Less: Interest		(0.7)
Present value of lease liabilities		3.6
Assets Held for Sale [Member]
Lease Assets and Liabilities [Abstract]
Operating lease ROU assets		6.1
Liabilities Held for Sale [Member]
Lease Assets and Liabilities [Abstract]
Operating lease liabilities, current		$ 6.1
Minimum [Member]
Significant Accounting Policy [Abstract]
Remaining lease term		1 year
Maximum [Member]
Significant Accounting Policy [Abstract]
Remaining lease term		13 years
[1]	In fiscal 2021 and 2020, operating lease expense included short-term lease expense of $3.5 million and $4.1 million, respectively. Variable lease expense was not significant.

Indebtedness (Details)

Indebtedness (Details) $ in Millions		1 Months Ended	3 Months Ended	12 Months Ended
		May 31, 2021	Mar. 31, 2021USD ($)	Mar. 31, 2021USD ($)	Mar. 31, 2020USD ($)
Long-Term Debt [Abstract]
Long-term debt			$ 337.3	$ 337.3	$ 472.6
Less: current portion			(21.9)	(21.9)	(15.6)
Less: unamortized debt issuance costs			(4.2)	(4.2)	(5)
Total long-term debt			311.2	311.2	452
Maturities of Long-Term Debt [Abstract]
2022			21.9	21.9
2023			21.9	21.9
2024			21.9	21.9
2025			153.2	153.2
2026			33.8	33.8
2027 and beyond			84.6	84.6
Long-term debt			337.3	337.3	472.6
Indebtedness [Abstract]
Short-term debt			$ 1.4	$ 1.4	14.8
Leverage ratio				1.9
Interest coverage ratio				9.3
Maximum [Member]
Indebtedness [Abstract]
Leverage ratio			5.75
Subsequent Event [Member]
Indebtedness [Abstract]
Leverage ratio		3.25
Level 2 [Member]
Indebtedness [Abstract]
Fair value of long-term debt			$ 146	$ 146	131.3
Credit Agreement [Member]
Indebtedness [Abstract]
Weighted-average interest rate for variable rate borrowings			2.50%	2.50%
Letters of credit outstanding			$ 5.7	$ 5.7
Term Loans [Member]
Long-Term Debt [Abstract]
Long-term debt			178.9	$ 178.9	189.4
Fiscal year of maturity				2025
Maturities of Long-Term Debt [Abstract]
Long-term debt			178.9	$ 178.9	189.4
Revolving Credit Facility [Member]
Long-Term Debt [Abstract]
Long-term debt			4.8	$ 4.8	127.2
Fiscal year of maturity				2025
Maturities of Long-Term Debt [Abstract]
Long-term debt			4.8	$ 4.8	127.2
Indebtedness [Abstract]
Maximum borrowing capacity			250	250
Available borrowing capacity			238.1	238.1
Swingline Loans [Member]
Indebtedness [Abstract]
Short-term debt			1.4	1.4
5.9% Senior Notes [Member]
Long-Term Debt [Abstract]
Long-term debt			$ 100	$ 100	100
Interest rate percentage			5.90%	5.90%
Fiscal year of maturity				2029
Maturities of Long-Term Debt [Abstract]
Long-term debt			$ 100	$ 100	100
5.8% Senior Notes [Member]
Long-Term Debt [Abstract]
Long-term debt			$ 50	$ 50	50
Interest rate percentage			5.80%	5.80%
Fiscal year of maturity				2027
Maturities of Long-Term Debt [Abstract]
Long-term debt			$ 50	$ 50	50
Other [Member]
Long-Term Debt [Abstract]
Long-term debt	[1]		3.6	3.6	6
Maturities of Long-Term Debt [Abstract]
Long-term debt	[1]		3.6	3.6	6
Foreign Credit Agreements [Member]
Indebtedness [Abstract]
Short-term debt					$ 14.8
Foreign Credit Agreements [Member] | Liabilities Held for Sale [Member]
Indebtedness [Abstract]
Short-term debt			$ 5	$ 5
[1]	Other long-term debt primarily includes finance lease obligations and borrowings by foreign subsidiaries.

Pension and Employee Benefit _3

Pension and Employee Benefit Plans, Defined Contribution Employee Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Pension and Employee Benefit Plans [Abstract]
Defined contribution plan cost recognized	$ 3	$ 6.6	$ 6.4
Maximum [Member]
Pension and Employee Benefit Plans [Abstract]
Company match	4.50%

Pension and Employee Benefit _4

Pension and Employee Benefit Plans, Defined Benefit Employee Benefit Plans (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Employer Contributions [Abstract]
Net periodic benefit cost (income)	[1]	$ 3.3	$ 3	$ 2.9
Pension Plans [Member]
Employer Contributions [Abstract]
Held for sale pension liabilities		17.8	0
Employer contributions		21.5	5.8
Net periodic benefit cost (income)		3.9	3.7	3.6
Pension Plans [Member] | U.S. Plans [Member]
Employer Contributions [Abstract]
Employer contributions		19.3	3.5	8
Pension Plans [Member] | Non-U.S Plans [Member]
Employer Contributions [Abstract]
Employer contributions		2.2	2.3	5.9
Postretirement Plans [Member]
Employer Contributions [Abstract]
Net periodic benefit cost (income)		$ (0.3)	$ (0.3)	$ (0.3)
[1]	Net periodic benefit cost for the Company’s pension and postretirement plans is exclusive of service cost.

Pension and Employee Benefit _5

Pension and Employee Benefit Plans, Changes in Benefit Obligations, Plan Assets and Funded Status (Details) - Pension Plans [Member] - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year		$ 264.7	$ 258.8
Service cost		0.4	0.4	$ 0.5
Interest cost		7.9	9.1	9.6
Actuarial loss		2.7	15.5
Benefits paid		(17.1)	(18.2)
Curtailment gains	[1]	(0.1)	(0.3)
Effect of exchange rate changes		2.1	(0.6)
Benefit obligation at end of year		260.6	264.7	258.8
Change in Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		131.1	155.1
Actual return on plan assets		47.8	(11.6)
Benefits paid		(17.1)	(18.2)
Employer contributions		21.5	5.8
Fair value of plan assets at end of year		183.3	131.1	155.1
Funded status at end of year		(77.3)	(133.6)
Amounts Recognized in the Consolidated Balance Sheets [Abstract]
Current liability		(0.9)	(2.7)
Noncurrent liability		(58.6)	(130.9)
Liabilities held for sale		(17.8)	0
Total liability		(77.3)	(133.6)
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Accumulated benefit obligation		258.9	263.1
Amounts Recognized in Accumulated Other Comprehensive Loss [Abstract]
Net actuarial loss (gain)		151.1	191.5
Non-U.S Plans [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year		35.7	36.5
Benefits paid		(2.2)	(2.2)
Effect of exchange rate changes		2.2
Service and interest cost		0.7	0.9
Increase (decrease) in benefit obligation		0.7	(0.8)
Benefit obligation at end of year		36.4	35.7	36.5
Change in Plan Assets [Roll Forward]
Employer contributions		$ 2.2	$ 2.3	$ 5.9
[1]	The curtailment gains in fiscal 2021 and 2020 are associated with headcount reductions in Europe within the Automotive segment.  The Company recognizes curtailment gains as a component of net periodic benefit cost in the period headcount reductions occur.  See Note 6 for additional information on the Company’s restructuring activities.

Pension and Employee Benefit _6

Pension and Employee Benefit Plans, Cost Components of Pension Plans (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Net Periodic Benefit Cost [Abstract]
Net periodic benefit cost	[1]	$ 3.3	$ 3	$ 2.9
Other Changes in Benefit Obligation Recognized in Other Comprehensive Income (Loss) [Abstract]
Amortization of net actuarial loss	[2]	6.7	5.8
Pension Plans [Member]
Net Periodic Benefit Cost [Abstract]
Service cost		0.4	0.4	0.5
Interest cost		7.9	9.1	9.6
Expected return on plan assets		(11.5)	(12)	(12.3)
Amortization of net actuarial loss		6.9	6	5.6
Settlements	[3]	0.2	0.2	0.2
Net periodic benefit cost		3.9	3.7	3.6
Other Changes in Benefit Obligation Recognized in Other Comprehensive Income (Loss) [Abstract]
Net actuarial gain (loss)		33.8	(38.7)	(7.7)
Amortization of net actuarial loss		7.1	6.2	5.8
Total recognized in other comprehensive income (loss)		40.9	(32.5)	(1.9)
Estimated amortization of net actuarial loss during fiscal 2022		(6.6)
Pension Plans [Member] | Liquid and Air-Cooled Automotive Businesses [Member]
Other Changes in Benefit Obligation Recognized in Other Comprehensive Income (Loss) [Abstract]
Estimated amortization of net actuarial loss during fiscal 2022		(7)
Pension Plans [Member] | Non-U.S Plans [Member] | Maximum [Member]
Net Periodic Benefit Cost [Abstract]
Amortization of net actuarial loss		1	$ 1	$ 1
Other Changes in Benefit Obligation Recognized in Other Comprehensive Income (Loss) [Abstract]
Estimated amortization of net actuarial loss during fiscal 2022		$ 1
[1]	Net periodic benefit cost for the Company’s pension and postretirement plans is exclusive of service cost.
[2]	Amounts are included in the calculation of net periodic benefit cost for the Company’s defined benefit plans, which include pension and other postretirement plans. See Note 18 for additional information about the Company’s pension plans.
[3]	The settlement charges resulted from activity associated with the Company’s non-U.S. pension plans.

Pension and Employee Benefit _7

Pension and Employee Benefit Plans, Valuation Assumptions (Details) - Pension Plans [Member]	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
U.S. Plans [Member]
Assumptions Used in Pension Plan Calculations [Abstract]
Weighted average discount rate used to determine benefit obligations	3.20%	3.40%
Weighted average discount rate used to determine costs	3.40%	4.00%	4.00%
Non-U.S Plans [Member]
Assumptions Used in Pension Plan Calculations [Abstract]
Weighted average discount rate used to determine benefit obligations	1.00%	1.00%
Weighted average discount rate used to determine costs	1.40%	1.70%	1.90%

Pension and Employee Benefit _8

Pension and Employee Benefit Plans, Weighted-average Asset Allocations (Details) - Pension Plans [Member] - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Weighted Average Asset Allocations [Abstract]
Target allocation		100.00%	100.00%
Plan assets		100.00%	100.00%
Employer contributions expected to be contributed during fiscal 2022		$ 13
Equity Securities [Member]
Weighted Average Asset Allocations [Abstract]
Target allocation		76.00%	65.00%
Plan assets		73.00%	60.00%
Debt Securities [Member]
Weighted Average Asset Allocations [Abstract]
Target allocation		18.00%	21.00%
Plan assets		17.00%	22.00%
Real Estate Investments [Member]
Weighted Average Asset Allocations [Abstract]
Target allocation		5.00%	13.00%
Plan assets		9.00%	16.00%
Cash and Cash Equivalents [Member]
Weighted Average Asset Allocations [Abstract]
Target allocation		1.00%	1.00%
Plan assets		1.00%	2.00%
U.S. Plans [Member]
Weighted Average Asset Allocations [Abstract]
Expected return on plan assets		7.50%	7.50%	7.50%
U.S. Plans [Member] | Forecast [Member]
Weighted Average Asset Allocations [Abstract]
Expected return on plan assets	7.50%

Pension and Employee Benefit _9

Pension and Employee Benefit Plans, Estimated Pension Benefit Payments (Details) - Pension Plans [Member] $ in Millions	Mar. 31, 2021USD ($)
Estimated Pension Benefit Payments [Abstract]
Fiscal year 2022	$ 15.2
Fiscal year 2023	15.5
Fiscal year 2024	15.6
Fiscal year 2025	15.6
Fiscal year 2026	15.5
Fiscal years 2027-2031	$ 74.6

Derivative Instruments, Recorde

Derivative Instruments, Recorded in Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Mar. 31, 2021	Mar. 31, 2020
Commodity Derivatives [Member] | Derivatives Designated as Hedges [Member] | Other Current Assets [Member]
Derivative Instruments [Abstract]
Derivative asset	$ 0.5	$ 0
Commodity Derivatives [Member] | Derivatives Designated as Hedges [Member] | Other Current Liabilities [Member]
Derivative Instruments [Abstract]
Derivative liability	0	1.3
Foreign Exchange Contracts [Member] | Derivatives Designated as Hedges [Member] | Other Current Assets [Member]
Derivative Instruments [Abstract]
Derivative asset	0.1	0.1
Foreign Exchange Contracts [Member] | Derivatives not Designated as Hedges [Member] | Other Current Liabilities [Member]
Derivative Instruments [Abstract]
Derivative liability	$ 0	$ 0

Derivative Instruments, Gains (

Derivative Instruments, Gains (Losses) Recognized (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments [Abstract]
Gain (loss) reclassified from AOCI	[1]	$ (0.1)	$ (0.5)
Designated [Member]
Derivative Instruments [Abstract]
Gain (loss) reclassified from AOCI		(0.1)	(0.5)	$ (0.2)
Non-Designated Derivative [Member]
Derivative Instruments [Abstract]
Gain (loss) recognized		0.6	(0.2)	(1)
Other Comprehensive Income [Member] | Designated [Member]
Derivative Instruments [Abstract]
Gain (loss) recognized		2.1	(2.5)	0.3
Commodity Derivatives [Member] | Cost of Sales [Member] | Designated [Member]
Derivative Instruments [Abstract]
Gain (loss) reclassified from AOCI		0	(0.8)	(0.4)
Commodity Derivatives [Member] | Cost of Sales [Member] | Other Comprehensive Income [Member] | Designated [Member]
Derivative Instruments [Abstract]
Gain (loss) recognized		2.2	(2.6)	(0.3)
Foreign Exchange Contracts [Member] | Cost of Sales [Member] | Designated [Member]
Derivative Instruments [Abstract]
Gain (loss) reclassified from AOCI		(0.1)	0.4	0.6
Foreign Exchange Contracts [Member] | Cost of Sales [Member] | Other Comprehensive Income [Member] | Designated [Member]
Derivative Instruments [Abstract]
Gain (loss) recognized		(0.1)	0.2	1
Foreign Exchange Contracts [Member] | Net Sales [Member] | Designated [Member]
Derivative Instruments [Abstract]
Gain (loss) reclassified from AOCI		0	(0.1)	(0.4)
Foreign Exchange Contracts [Member] | Net Sales [Member] | Non-Designated Derivative [Member]
Derivative Instruments [Abstract]
Gain (loss) recognized		0	(0.1)	(0.7)
Foreign Exchange Contracts [Member] | Net Sales [Member] | Other Comprehensive Income [Member] | Designated [Member]
Derivative Instruments [Abstract]
Gain (loss) recognized		0	(0.1)	(0.4)
Foreign Exchange Contracts [Member] | Other Income (Expense) - Net [Member] | Non-Designated Derivative [Member]
Derivative Instruments [Abstract]
Gain (loss) recognized		$ 0.6	$ (0.1)	$ (0.3)
[1]	Amounts represent net gains and losses associated with cash flow hedges that were reclassified to net earnings. See Note 19 for additional information regarding derivative instruments.

Risks, Uncertainties, Conting_2

Risks, Uncertainties, Contingencies and Litigation (Details) $ in Millions	12 Months Ended
	Mar. 31, 2021USD ($)Customer	Mar. 31, 2020USD ($)Customer	Mar. 31, 2019Customer
Environmental loss contingencies [Abstract]
Reserves for environmental matters | $	$ 16	$ 18.2
Sales [Member] | Customer Concentration Risk [Member] | Top Ten Customers [Member]
Credit Risk [Abstract]
Concentration risk, percentage	43.00%	45.00%	50.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member]
Credit Risk [Abstract]
Number of top customers	10
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Top Ten Customers [Member]
Credit Risk [Abstract]
Concentration risk, percentage	35.00%	34.00%
Vehicular [Member]
Credit Risk [Abstract]
Number of major customers	1	1	2

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Changes in Accumulated Other Comprehensive Loss [Abstract]
Beginning balance		$ 487.9
Other comprehensive income (loss) before reclassifications		66.3	$ (59.4)
Reclassifications for amortization of unrecognized net loss	[1]	6.7	5.8
Reclassifications for realized losses - net	[2]	0.1	0.5
Reclassifications for foreign currency translation gains	[3]		(0.6)
Income taxes		(11)	8.8
Total other comprehensive income (loss)		62.1	(44.9)
Ending balance		348.7	487.9
Nikkei Heat Exchanger Company, Ltd [Member]
Changes in Accumulated Other Comprehensive Loss [Abstract]
Gain (loss) on write-off of accumulated foreign currency translation			0.6
Accumulated Other Comprehensive Loss [Member]
Changes in Accumulated Other Comprehensive Loss [Abstract]
Beginning balance		(223.3)	(178.4)
Ending balance		(161.2)	(223.3)
Foreign Currency Translation [Member]
Changes in Accumulated Other Comprehensive Loss [Abstract]
Beginning balance		(61.4)	(42.6)
Other comprehensive income (loss) before reclassifications		30.4	(18.2)
Reclassifications for amortization of unrecognized net loss	[1]	0	0
Reclassifications for realized losses - net	[2]	0	0
Reclassifications for foreign currency translation gains	[3]		(0.6)
Income taxes		0	0
Total other comprehensive income (loss)		30.4	(18.8)
Ending balance		(31)	(61.4)
Defined Benefit Plans [Member]
Changes in Accumulated Other Comprehensive Loss [Abstract]
Beginning balance		(160.9)	(136.3)
Other comprehensive income (loss) before reclassifications		33.8	(38.7)
Reclassifications for amortization of unrecognized net loss	[1]	6.7	5.8
Reclassifications for realized losses - net	[2]	0	0
Reclassifications for foreign currency translation gains	[3]		0
Income taxes		(10.4)	8.3
Total other comprehensive income (loss)		30.1	(24.6)
Ending balance		(130.8)	(160.9)
Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Loss [Abstract]
Beginning balance		(1)	0.5
Other comprehensive income (loss) before reclassifications		2.1	(2.5)
Reclassifications for amortization of unrecognized net loss	[1]	0	0
Reclassifications for realized losses - net	[2]	0.1	0.5
Reclassifications for foreign currency translation gains	[3]		0
Income taxes		(0.6)	0.5
Total other comprehensive income (loss)		1.6	(1.5)
Ending balance		$ 0.6	$ (1)
[1]	Amounts are included in the calculation of net periodic benefit cost for the Company’s defined benefit plans, which include pension and other postretirement plans. See Note 18 for additional information about the Company’s pension plans.
[2]	Amounts represent net gains and losses associated with cash flow hedges that were reclassified to net earnings. See Note 19 for additional information regarding derivative instruments.
[3]	As a result of the sale of its investment in NEX during fiscal 2020, the Company wrote off $0.6 million of accumulated foreign currency translation gains.

Segment and Geographic Inform_3

Segment and Geographic Information, Net Sales, Gross Profit, and Operating Income by Segment (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Segment and Geographic Information [Abstract]
Net sales		$ 1,808.4	$ 1,975.5	$ 2,212.7
Gross profit		$ 293.4	$ 307.5	$ 365.5
Gross profit (% of sales)		16.20%	15.60%	16.50%
Operating (loss) income		$ (97.7)	$ 37.9	$ 109.7
Strategic review alternatives cost		6.6	39.2	7.1
BHVAC [Member]
Segment and Geographic Information [Abstract]
Net sales		240.6	221.1	212.4
CIS [Member]
Segment and Geographic Information [Abstract]
Net sales		532	623.9	707.6
HDE [Member]
Segment and Geographic Information [Abstract]
Net sales		682.1	745.9	872.3
Automotive [Member]
Segment and Geographic Information [Abstract]
Net sales		398.3	444.9	488.9
Total Segments [Member]
Segment and Geographic Information [Abstract]
Net sales		1,853	2,035.8	2,281.2
Operating Segments [Member]
Segment and Geographic Information [Abstract]
Net sales		1,808.4	1,975.5	2,212.7
Gross profit		$ 293.9	$ 309.4	$ 365.1
Gross profit (% of sales)		15.90%	15.20%	16.00%
Operating (loss) income		$ (58.7)	$ 97.1	$ 144.9
Operating Segments [Member] | BHVAC [Member]
Segment and Geographic Information [Abstract]
Net sales		240.3	219.4	209.1
Gross profit		$ 83	$ 71.5	$ 63.4
Gross profit (% of sales)		34.50%	32.30%	29.90%
Operating (loss) income		$ 47.2	$ 36.4	$ 26.9
Operating Segments [Member] | CIS [Member]
Segment and Geographic Information [Abstract]
Net sales		528.1	620.1	704.7
Gross profit		$ 66.5	$ 92.9	$ 114.9
Gross profit (% of sales)		12.50%	14.90%	16.20%
Operating (loss) income		$ 8.2	$ 32.9	$ 53.4
Operating Segments [Member] | HDE [Member]
Segment and Geographic Information [Abstract]
Net sales		648.3	693.8	811.8
Gross profit		$ 88.4	$ 96.6	$ 127.8
Gross profit (% of sales)		13.00%	13.00%	14.70%
Operating (loss) income		$ 36.8	$ 37.8	$ 65
Operating Segments [Member] | Automotive [Member]
Segment and Geographic Information [Abstract]
Net sales		391.7	442.2	487.1
Gross profit		$ 56	$ 48.4	$ 59
Gross profit (% of sales)		14.10%	10.90%	12.10%
Operating (loss) income		$ (150.9)	$ (10)	$ (0.4)
Corporate and Eliminations [Member]
Segment and Geographic Information [Abstract]
Net sales		(44.6)	(60.3)	(68.5)
Gross profit		$ (0.5)	$ (1.9)	$ 0.4
Gross profit (% of sales)		0.00%	0.00%	0.00%
Operating (loss) income	[1]	$ (39)	$ (59.2)	$ (35.2)
Inter-segment Sales [Member]
Segment and Geographic Information [Abstract]
Net sales		44.6	60.3	68.5
Inter-segment Sales [Member] | BHVAC [Member]
Segment and Geographic Information [Abstract]
Net sales		0.3	1.7	3.3
Inter-segment Sales [Member] | CIS [Member]
Segment and Geographic Information [Abstract]
Net sales		3.9	3.8	2.9
Inter-segment Sales [Member] | HDE [Member]
Segment and Geographic Information [Abstract]
Net sales		33.8	52.1	60.5
Inter-segment Sales [Member] | Automotive [Member]
Segment and Geographic Information [Abstract]
Net sales		$ 6.6	$ 2.7	$ 1.8
[1]	The operating loss for Corporate includes certain research and development costs, legal, finance and other general corporate and central services expenses, and other costs that are either not directly attributable to an operating segment or not considered when management evaluates segment performance. During fiscal 2021, 2020 and 2019, the Company recorded $6.6 million, $39.2 million, and $7.1 million respectively, of costs directly associated with its review of strategic alternatives for the liquid-and air-cooled automotive businesses, including costs to separate and prepare the underlying businesses for potential sale.

Segment and Geographic Inform_4

Segment and Geographic Information, Total Assets by Segment (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Segment and Geographic Information [Abstract]
Total assets		$ 1,276.7	$ 1,536.1
Impairment charges		166.8	8.6	$ 0.4
Change in deferred tax asset valuation allowance		22	9.2
Automotive [Member]
Segment and Geographic Information [Abstract]
Impairment charges		1.7
Corporate [Member]
Segment and Geographic Information [Abstract]
Total assets		17.5
Change in deferred tax asset valuation allowance		103.3
Operating Segments [Member] | BHVAC [Member]
Segment and Geographic Information [Abstract]
Total assets		110.8	102.3
Operating Segments [Member] | CIS [Member]
Segment and Geographic Information [Abstract]
Total assets		609.2	617.7
Operating Segments [Member] | HDE [Member]
Segment and Geographic Information [Abstract]
Total assets		438.7	417.4
Operating Segments [Member] | Automotive [Member]
Segment and Geographic Information [Abstract]
Total assets	[1]	124.2	272.5
Corporate and Eliminations [Member]
Segment and Geographic Information [Abstract]
Total assets	[2]	$ (6.2)	$ 126.2
[1]	During fiscal 2021, the Company recorded impairment charges totaling $166.8 million within the Automotive segment, primarily related to the property, plant and equipment of the liquid- and air-cooled automotive businesses, which are classified as held for sale as of March 31, 2021.  See Note 2 for additional information.
[2]	At March 31, 2021, Corporate assets totaled $17.5 million and were more than offset by eliminations for intercompany balances, including accounts receivable.  During fiscal 2021, the Company recorded income tax charges totaling $103.3 million, which established a full valuation allowance on deferred tax assets in the U.S that are recorded at Corporate.  See Note 8 for additional information.

Segment and Geographic Inform_5

Segment and Geographic Information, Capital Expenditures and Depreciation and Amortization Expense by Segment (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Segment and Geographic Information [Abstract]
Capital expenditures		$ 32.7	$ 71.3	$ 73.9
Depreciation and amortization		68.6	77.1	76.9
Operating Segments [Member] | BHVAC [Member]
Segment and Geographic Information [Abstract]
Capital expenditures		1.5	3.1	1.3
Depreciation and amortization		3.1	3.4	3.5
Operating Segments [Member] | CIS [Member]
Segment and Geographic Information [Abstract]
Capital expenditures		6.1	15	16.4
Depreciation and amortization		25	24	23.9
Operating Segments [Member] | HDE [Member]
Segment and Geographic Information [Abstract]
Capital expenditures		13.5	31.5	29.4
Depreciation and amortization		25.5	25.4	26.3
Operating Segments [Member] | Automotive [Member]
Segment and Geographic Information [Abstract]
Capital expenditures		11.1	19.1	24.9
Depreciation and amortization	[1]	13.2	22.3	21.2
Operating Segments [Member] | Corporate [Member]
Segment and Geographic Information [Abstract]
Capital expenditures		0.5	2.6	1.9
Depreciation and amortization		$ 1.8	$ 2	$ 2
[1]	Upon classifying the liquid- and air-cooled automotive businesses as held for sale, the Company ceased depreciating  the long-lived assets within the disposal groups.  See Note 2 for additional information.

Segment and Geographic Inform_6

Segment and Geographic Information, Net Sales by Geographical Area (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Segment and Geographic Information [Abstract]
Net sales	$ 1,808.4	$ 1,975.5	$ 2,212.7
Reportable Geographical Components [Member] | United States [Member]
Segment and Geographic Information [Abstract]
Net sales	765.7	941.9	1,032.3
Reportable Geographical Components [Member] | China [Member]
Segment and Geographic Information [Abstract]
Net sales	217.6	168.5	172.1
Reportable Geographical Components [Member] | Italy [Member]
Segment and Geographic Information [Abstract]
Net sales	188.6	187.4	217.3
Reportable Geographical Components [Member] | Hungary [Member]
Segment and Geographic Information [Abstract]
Net sales	153.7	142.4	165.6
Reportable Geographical Components [Member] | United Kingdom [Member]
Segment and Geographic Information [Abstract]
Net sales	96.4	82	86.6
Reportable Geographical Components [Member] | Germany [Member]
Segment and Geographic Information [Abstract]
Net sales	83.4	97.5	123.1
Reportable Geographical Components [Member] | Austria [Member]
Segment and Geographic Information [Abstract]
Net sales	59.6	93	116.2
Reportable Geographical Components [Member] | Other [Member]
Segment and Geographic Information [Abstract]
Net sales	$ 243.4	$ 262.8	$ 299.5

Segment and Geographic Inform_7

Segment and Geographic Information, Property, Plant and Equipment by Geographical Area (Details) - USD ($) $ in Millions		Mar. 31, 2021	Mar. 31, 2020
Segment and Geographic Information [Abstract]
Property, plant and equipment	[1]	$ 269.9	$ 448
Reportable Geographical Components [Member] | United States [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		80.3	114.6
Reportable Geographical Components [Member] | Mexico [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		43.5	50
Reportable Geographical Components [Member] | China [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		31.3	56.8
Reportable Geographical Components [Member] | Italy [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		30	49.8
Reportable Geographical Components [Member] | Hungary [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		27.6	55.4
Reportable Geographical Components [Member] | Germany [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		1.8	27
Reportable Geographical Components [Member] | Austria [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		0	26
Reportable Geographical Components [Member] | Other [Member]
Segment and Geographic Information [Abstract]
Property, plant and equipment		$ 55.4	$ 68.4
[1]	In connection with the pending sales of the liquid- and air-cooled automotive businesses within the Automotive segment, the Company wrote-down the carrying value of the disposal groups’ property, plant and equipment to zero as of March 31, 2021.  The assets impaired were located in Hungary, Germany, Austria, China, the U.S., Italy, and the Netherlands.  See Note 2 for additional information on the held for sale businesses and impairment charges recorded during fiscal 2021.

Schedule II - Valuation and Q_2

Schedule II - Valuation and Qualifying Accounts (Details) - Valuation Allowance for Deferred Tax Assets [Member] - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Valuation and Qualifying Accounts [Roll Forward]
Balance at beginning of period		$ 46.9	$ 43.4	$ 48.9
Additions charged (benefit) to costs and expenses		86.2	4.5	(1.6)
Additions charged to other accounts	[1]	2.8	(1)	(3.9)
Reclassified as held for sale		(45.2)	0	0
Balance at end of period		$ 90.7	$ 46.9	$ 43.4
[1]	Foreign currency translation and other adjustments.