American Axle & Manufacturing (AXL) 10-Q 4 Aug 23 2023 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2023	Aug. 01, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
Document Transition Report	false
Entity File Number	1-14303
Entity Registrant Name	AMERICAN AXLE & MANUFACTURING HOLDINGS, INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	38-3161171
Entity Address, Address Line One	One Dauch Drive
Entity Address, City or Town	Detroit
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48211-1198
City Area Code	313
Local Phone Number	758-2000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	AXL
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding (in shares)		117,057,899
Entity Central Index Key	0001062231
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Amendment Flag	false

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net sales	$ 1,570.7	$ 1,438.3	$ 3,064.6	$ 2,874.5
Cost of goods sold	1,392.5	1,264.8	2,725.8	2,514.2
Gross profit	178.2	173.5	338.8	360.3
Selling, general and administrative expenses	91.1	84.8	189.4	170.9
Amortization of intangible assets	21.4	21.4	42.8	42.9
Restructuring and acquisition-related costs	7.9	9.6	12.7	18.5
Operating income	57.8	57.7	93.9	128
Interest expense	(50.2)	(42.7)	(100.7)	(87.4)
Interest income	5.9	3.2	11.8	6.2
Debt refinancing and redemption costs	0	(0.2)	0	(5.8)
Gain on bargain purchase of business	0	11.6	0	11.6
Unrealized gain (loss) on equity securities	0.3	(3.7)	0	(21.7)
Other income (expense), net	(0.5)	(2.4)	3.2	(3.4)
Income before income taxes	13.3	23.5	8.2	27.5
Income tax expense	5.3	0.6	5.3	3.6
Net income	$ 8	$ 22.9	$ 2.9	$ 23.9
Basic earnings per share	$ 0.07	$ 0.19	$ 0.02	$ 0.20
Diluted earnings per share	$ 0.07	$ 0.19	$ 0.02	$ 0.20

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net income		$ 8	$ 22.9	$ 2.9	$ 23.9
Other comprehensive income (loss)
Defined benefit plans, net of tax	[1]	(0.7)	1.3	(1.4)	2.6
Foreign currency translation adjustments		(4.7)	(42.3)	4.1	(36.3)
Changes in cash flow hedges, net of tax	[2]	17.3	(1.7)	19.8	14
Other comprehensive income (loss)		11.9	(42.7)	22.5	(19.7)
Comprehensive income (loss)		$ 19.9	$ (19.8)	$ 25.4	$ 4.2
[1]Amounts are net of tax of $0.4 million and $0.9 million for the three and six months ended June 30, 2023 and $(0.5) million and $(1.0) million for the three and six months ended June 30, 2022.[2]Amounts are net of tax of $(3.5) million and $(1.7) million for the three and six months ended June 30, 2023 and $0.2 million and $(2.7) million for the three and six months ended June 30, 2022.

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Other comprehensive income (loss), pension and other postretirement benefit plans, tax	$ 0.4	$ (0.5)	$ 0.9	$ (1)
Other comprehensive income (loss), derivatives qualifying as hedges, tax	$ (3.5)	$ 0.2	$ (1.7)	$ (2.7)

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 511.1	$ 511.5
Accounts receivable, net	921.1	820.2
Inventories, net	477.1	463.9
Prepaid expenses and other	200.3	197.8
Total current assets	2,109.6	1,993.4
Property, plant and equipment, net	1,817.9	1,903
Deferred income taxes	135.8	119
Goodwill	181.7	181.6
Other intangible assets, net	574.2	616.2
GM postretirement cost sharing asset	128.2	127.6
Operating lease right-of-use assets	103.3	107.2
Other assets and deferred charges	456.7	421.4
Total assets	5,507.4	5,469.4
Current liabilities
Current portion of long-term debt	16.3	75.9
Accounts payable	828.4	734
Accrued compensation and benefits	183.8	186.6
Deferred revenue	15.9	28.1
Current portion of operating lease liabilities	20.8	21.1
Accrued expenses and other	168.4	153.6
Total current liabilities	1,233.6	1,199.3
Long-term debt, net	2,853.9	2,845.1
Deferred revenue	69.3	73.4
Deferred income taxes	6.4	10.7
Long-term portion of operating lease liabilities	84.1	87.2
Postretirement benefits and other long-term liabilities	615.3	626.4
Total liabilities	4,862.6	4,842.1
Stockholders' equity
Common stock, par value $0.01 per share; 150.0 million shares authorized; 127.4 million shares issued as of June 30, 2023 and 123.3 million shares issued as of December 31, 2022	1.3	1.3
Paid-in capital	1,376	1,369.2
Accumulated deficit	(246.7)	(249.6)
Treasury stock at cost, 10.3 million shares as of June 30, 2023 and 8.7 million shares as of December 31, 2022	(232.9)	(218.2)
Accumulated other comprehensive income (loss)
Defined benefit plans, net of tax	(148.3)	(146.9)
Foreign currency translation adjustments	(145.6)	(149.7)
Unrecognized gain on cash flow hedges, net of tax	41	21.2
Total stockholders' equity	644.8	627.3
Total liabilities and stockholders' equity	$ 5,507.4	$ 5,469.4

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Millions	Jun. 30, 2023	Dec. 31, 2022
Common stock, par or stated value per share	$ 0.01	$ 0.01
Common stock, shares authorized	150	150
Common stock, shares, issued	127.4	123.3
Treasury Stock, Common, Shares	10.3	8.7

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Net income	$ 2.9	$ 23.9
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	245.4	242.3
Deferred income taxes	(21)	(14.2)
Stock-based compensation	6.8	9.1
Pensions and other postretirement benefits, net of contributions	(7)	(4.6)
Loss (gain) on disposal of property, plant and equipment, net	3.2	(2.2)
Unrealized loss on equity securities	0	21.7
Gain on bargain purchase of business	0	(11.6)
Debt refinancing and redemption costs	0	5.8
Changes in operating assets and liabilities
Accounts receivable	(97.4)	(147.1)
Inventories	(7.9)	(25.4)
Accounts payable and accrued expenses	99.2	145.7
Deferred revenue	(17.2)	(7.7)
Other assets and liabilities	(42.1)	(20.5)
Net cash provided by operating activities	164.9	215.2
Investing activities
Purchases of property, plant and equipment	(90.7)	(71.2)
Proceeds from sale of property, plant and equipment	0.4	4.2
Acquisition of business, net of cash acquired	(1.3)	(87.6)
Proceeds from insurance claim	17	4.6
Other investing activities	(3.3)	(0.2)
Net cash used in investing activities	(77.9)	(150.2)
Financing activities
Payments of Revolving Credit Facility	(25)	0
Proceeds from issuance of long-term debt	33.9	220.7
Payments of long-term debt	(71.2)	(310.6)
Debt issuance costs	(3.1)	(4.4)
Purchase of treasury stock	(14.7)	(1.9)
Other financing activities	(7.3)	9.5
Net cash used in financing activities	(87.4)	(86.7)
Effect of exchange rate changes on cash	0	(7.1)
Net decrease in cash and cash equivalents	(0.4)	(28.8)
Cash and cash equivalents at beginning of period	511.5	530.2
Cash and cash equivalents at end of period	511.1	501.4
Supplemental cash flow information
Interest paid	88.8	86.5
Income taxes paid, net	$ 40.6	$ 20.5

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions		Total		Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Treasury Stock, Common	AOCI Attributable to Parent
Common stock, shares, outstanding at Dec. 31, 2021		114
Total stockholders' equity at Dec. 31, 2021				$ 1.3	$ 1,351.5	$ (313.9)	$ (216.3)	$ (364.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)						1
Stock issued during period, shares, share-based compensation, net of forfeitures		0.7
Vesting of restricted stock units and performance shares				0
Stock-based compensation					4.5
Treasury stock, shares, acquired		(0.2)
Purchase of treasury stock							(1.8)
Changes in cash flow hedges, net of tax								15.7
Foreign currency translation adjustments								6
Defined benefit plans, net of tax								1.3
Common stock, shares, outstanding at Mar. 31, 2022		114.5
Total stockholders' equity at Mar. 31, 2022				1.3	1,356	(312.9)	(218.1)	(341.8)
Common stock, shares, outstanding at Dec. 31, 2021		114
Total stockholders' equity at Dec. 31, 2021				1.3	1,351.5	(313.9)	(216.3)	(364.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		$ 23.9
Purchase of treasury stock		1.9
Changes in cash flow hedges, net of tax	[1]	14
Foreign currency translation adjustments		(36.3)
Defined benefit plans, net of tax	[2]	$ 2.6
Common stock, shares, outstanding at Jun. 30, 2022		114.5
Total stockholders' equity at Jun. 30, 2022				1.3	1,360.6	(290)	(218.2)	(384.5)
Common stock, shares, outstanding at Mar. 31, 2022		114.5
Total stockholders' equity at Mar. 31, 2022				1.3	1,356	(312.9)	(218.1)	(341.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		$ 22.9				22.9
Stock-based compensation					4.6
Treasury stock, shares, acquired		0
Purchase of treasury stock							(0.1)
Changes in cash flow hedges, net of tax		$ (1.7)	[1]					(1.7)
Foreign currency translation adjustments		(42.3)						(42.3)
Defined benefit plans, net of tax		$ 1.3	[2]					1.3
Common stock, shares, outstanding at Jun. 30, 2022		114.5
Total stockholders' equity at Jun. 30, 2022				1.3	1,360.6	(290)	(218.2)	(384.5)
Common stock, shares, outstanding at Dec. 31, 2022		114.6
Total stockholders' equity at Dec. 31, 2022		$ 627.3		1.3	1,369.2	(249.6)	(218.2)	(275.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)						(5.1)
Stock issued during period, shares, share-based compensation, net of forfeitures		4
Vesting of restricted stock units and performance shares				0
Stock-based compensation					3.4
Treasury stock, shares, acquired		(1.6)
Purchase of treasury stock							(14.5)
Changes in cash flow hedges, net of tax								2.5
Foreign currency translation adjustments								8.8
Defined benefit plans, net of tax								(0.7)
Common stock, shares, outstanding at Mar. 31, 2023		117
Total stockholders' equity at Mar. 31, 2023				1.3	1,372.6	(254.7)	(232.7)	(264.8)
Common stock, shares, outstanding at Dec. 31, 2022		114.6
Total stockholders' equity at Dec. 31, 2022		$ 627.3		1.3	1,369.2	(249.6)	(218.2)	(275.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		2.9
Purchase of treasury stock		14.7
Changes in cash flow hedges, net of tax	[1]	19.8
Foreign currency translation adjustments		4.1
Defined benefit plans, net of tax	[2]	$ (1.4)
Common stock, shares, outstanding at Jun. 30, 2023		117.1
Total stockholders' equity at Jun. 30, 2023		$ 644.8		1.3	1,376	(246.7)	(232.9)	(252.9)
Common stock, shares, outstanding at Mar. 31, 2023		117
Total stockholders' equity at Mar. 31, 2023				1.3	1,372.6	(254.7)	(232.7)	(264.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		$ 8				8
Stock issued during period, shares, share-based compensation, net of forfeitures		0.1
Vesting of restricted stock units and performance shares				0
Stock-based compensation					3.4
Treasury stock, shares, acquired		0
Purchase of treasury stock							(0.2)
Changes in cash flow hedges, net of tax		$ 17.3	[1]					17.3
Foreign currency translation adjustments		(4.7)						(4.7)
Defined benefit plans, net of tax		$ (0.7)	[2]					(0.7)
Common stock, shares, outstanding at Jun. 30, 2023		117.1
Total stockholders' equity at Jun. 30, 2023		$ 644.8		$ 1.3	$ 1,376	$ (246.7)	$ (232.9)	$ (252.9)
[1]Amounts are net of tax of $(3.5) million and $(1.7) million for the three and six months ended June 30, 2023 and $0.2 million and $(2.7) million for the three and six months ended June 30, 2022.[2]Amounts are net of tax of $0.4 million and $0.9 million for the three and six months ended June 30, 2023 and $(0.5) million and $(1.0) million for the three and six months ended June 30, 2022.

Organization and Basis of Prese

Organization and Basis of Presentation (Notes)	6 Months Ended
	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. ORGANIZATION AND BASIS OF PRESENTATION Organization As a leading global tier 1 automotive and mobility supplier, AAM designs, engineers and manufactures Driveline and Metal Forming technologies to support electric, hybrid, and internal combustion vehicles. Headquartered in Detroit, with over 80 facilities in 18 countries, AAM is bringing the future faster for a safer and more sustainable tomorrow. Basis of Presentation We have prepared the accompanying interim condensed consolidated financial statements in accordance with the instructions to Form 10-Q under the Securities Exchange Act of 1934. These condensed consolidated financial statements are unaudited but include all normal recurring adjustments, which we consider necessary for a fair presentation of the information set forth herein. Results of operations for the periods presented are not necessarily indicative of the results for the full fiscal year. The balance sheet at December 31, 2022 presented herein has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States of America (GAAP) for complete consolidated financial statements. In order to prepare the accompanying interim condensed consolidated financial statements, we are required to make estimates and assumptions that affect the reported amounts and disclosures in our interim condensed consolidated financial statements. These estimates and assumptions are impacted by risks and uncertainties, including those associated with the significant disruptions in the supply chain that continue to impact the automotive industry, including volatility in metal, commodity and utility costs, shortages of certain raw materials and components, including semiconductor chips, increased transportation costs, higher labor costs and labor shortages. While we have made estimates and assumptions based on the facts and circumstances available as of the date of this report, the full impact of these matters cannot be predicted, and actual results could differ materially from those estimates and assumptions. For further information, refer to the audited consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2022.

Restructuring and Acquisition-R

Restructuring and Acquisition-Related Costs (Notes)	6 Months Ended
	Jun. 30, 2023
Restructuring and Related Activities [Abstract]
Business Acquisition, Integration, Restructuring and Other Related Costs [Text Block]	2. RESTRUCTURING AND ACQUISITION-RELATED COSTS In the first quarter of 2020, we initiated a global restructuring program (the 2020 Program). The primary objectives of the 2020 Program are to achieve efficiencies within our corporate and business unit support teams to reduce cost in our business, and to structurally adjust our operations to a new level of market demand based on the impact of COVID-19. We expect to complete restructuring actions under the 2020 Program in 2023. In the second quarter of 2021, we completed the acquisition of a manufacturing facility in Emporium, Pennsylvania (Emporium), and subsequently determined that we will cease production at the facility and relocate the production capacity to other AAM manufacturing facilities. As a result, during the six months ended June 30, 2023, we incurred restructuring charges related to the closure of the facility and we expect to complete restructuring actions associated with the closure of the facility in 2023. In 2022, we completed our acquisition of Tekfor Group (Tekfor) and initiated certain restructuring actions associated with the acquired entities in the first quarter of 2023. We expect to incur restructuring costs associated with the acquired entities through 2023. A summary of our restructuring activity for the first six months of 2023 and 2022 is shown below: Severance Charges Implementation Costs Total (in millions) Accrual at December 31, 2021 $ 0.7 $ 2.7 $ 3.4 Charges 1.3 10.3 11.6 Cash utilization (1.2) (10.6) (11.8) Accrual at June 30, 2022 $ 0.8 $ 2.4 $ 3.2 Accrual at December 31, 2022 $ 2.4 $ 1.4 $ 3.8 Charges 1.4 9.3 10.7 Cash utilization (2.1) (7.4) (9.5) Accrual at June 30, 2023 $ 1.7 $ 3.3 $ 5.0 As part of our restructuring actions, we incurred total severance charges of approximately $1.4 million and $1.3 million during the six months ended June 30, 2023 and 2022, respectively. We also incurred total implementation costs of approximately $9.3 million and $10.3 million during the six months ended June 30, 2023 and 2022, respectively. Implementation costs consist primarily of plant exit costs. We incurred $4.9 million of restructuring costs under the 2020 Program, $4.4 million of costs associated with the anticipated closure of Emporium, and $1.4 million of costs related to restructuring actions associated with Tekfor in the six months ended June 30, 2023. We have incurred $105.5 million of total restructuring costs under the 2020 Program since inception and have incurred $16.5 million of total costs related to the anticipated closure of Emporium. Substantially all of our total restructuring costs for the six months ended June 30, 2023 related to our Metal Forming segment. Approximately $1.0 million and $6.1 million of our total restructuring costs for the six months ended June 30, 2022 related to our Driveline and Metal Forming segments, respectively, while the remainder were corporate costs. We expect to incur approximately $10 million to $20 million of total restructuring charges in 2023 associated with the 2020 Program, our closure of Emporium and restructuring actions related to Tekfor. The following table represents a summary of acquisition-related charges incurred primarily related to our acquisition of Tekfor, as well as integration costs incurred for acquisitions: Acquisition-Related Costs Integration Expenses Total (in millions) Charges for the six months ended June 30, 2023 $ — $ 2.0 $ 2.0 Charges for the six months ended June 30, 2022 5.7 1.2 6.9

Inventories (Notes)

Inventories (Notes)	6 Months Ended
	Jun. 30, 2023
Inventory Disclosure [Abstract]
Inventory Disclosure [Text Block]	3. INVENTORIES We state our inventories at the lower of cost or net realizable value. The cost of our inventories is determined using the first-in first-out method. When we determine that our gross inventories exceed usage requirements, or if inventories become obsolete or otherwise not saleable, we record a provision for such loss as a component of our inventory accounts. Inventories consist of the following: June 30, 2023 December 31, 2022 (in millions) Raw materials and work-in-progress $ 423.5 $ 398.9 Finished goods 88.0 92.5 Gross inventories 511.5 491.4 Inventory valuation reserves (34.4) (27.5) Inventories, net $ 477.1 $ 463.9

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets (Notes)	6 Months Ended
	Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Text Block]	4. GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill The following table provides a reconciliation of changes in goodwill for the six months ended June 30, 2023: Consolidated (in millions) Balance at December 31, 2022 $ 181.6 Foreign currency translation 0.1 Balance at June 30, 2023 $ 181.7 We conduct our annual goodwill impairment test in the fourth quarter of each year, as well as whenever adverse events or changes in circumstances indicate a possible impairment. In performing this test, we utilize a third-party valuation specialist to assist management in determining the fair value of our reporting units. Fair value of each reporting unit is estimated based on a combination of discounted cash flows and the use of pricing multiples derived from an analysis of comparable public companies multiplied against historical and/or anticipated financial metrics of each reporting unit. These calculations contain uncertainties as they require management to make assumptions including, but not limited to, market comparables, future cash flows of the reporting units, and appropriate discount and long-term growth rates. This fair value determination is categorized as Level 3 within the fair value hierarchy. At June 30, 2023, accumulated goodwill impairment losses were $1,435.5 million. All remaining goodwill is attributable to our Driveline reporting unit. Other Intangible Assets The following table provides a reconciliation of the gross carrying amount and associated accumulated amortization for AAM's other intangible assets, which are all subject to amortization: June 30, December 31, 2023 2022 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount (in millions) Capitalized computer software $ 52.9 $ (46.2) $ 6.7 $ 52.2 $ (43.2) $ 9.0 Customer platforms 856.2 (396.4) 459.8 856.2 (364.7) 491.5 Customer relationships 53.0 (21.4) 31.6 53.0 (19.7) 33.3 Technology and other 154.0 (77.9) 76.1 154.1 (71.7) 82.4 Total $ 1,116.1 $ (541.9) $ 574.2 $ 1,115.5 $ (499.3) $ 616.2 Amortization expense for our intangible assets was $21.4 million for both the three months ended June 30, 2023 and June 30, 2022, and was $42.8 million for the six months ended June 30, 2023 and $42.9 million for the six months ended June 30, 2022. Estimated amortization expense for the years 2023 through 2027 is expected to be in the range of approximately $80 million to $85 million per year.

Long-Term Debt (Notes)

Long-Term Debt (Notes)	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Long-term Debt [Text Block]	5. LONG-TERM DEBT Long-term debt consists of the following: June 30, 2023 December 31, 2022 (in millions) Revolving Credit Facility $ — $ 25.0 Term Loan A Facility 500.5 520.0 Term Loan B Facility 664.9 675.0 6.875% Notes due 2028 400.0 400.0 6.50% Notes due 2027 500.0 500.0 6.25% Notes due 2026 180.0 180.0 5.00% Notes due 2029 600.0 600.0 Foreign credit facilities and other 73.3 72.7 Total debt 2,918.7 2,972.7 Less: Current portion of long-term debt 16.3 75.9 Long-term debt 2,902.4 2,896.8 Less: Debt issuance costs 48.5 51.7 Long-term debt, net $ 2,853.9 $ 2,845.1 Senior Secured Credit Facilities Our Senior Secured Credit Facilities are comprised of the Revolving Credit Facility, Term Loan A Facility and Term Loan B Facility. The Revolving Credit Facility and Term Loan A Facility mature in the first quarter of 2027 and the Term Loan B Facility matures in the fourth quarter of 2029. At June 30, 2023, we had $891.2 million available under the Revolving Credit Facility. This availability reflects a reduction of $33.8 million for standby letters of credit issued against the facility. In the first quarter of 2023, we paid $25.0 million on our Revolving Credit Facility that had been drawn in the fourth quarter of 2022. On June 28, 2023, Holdings and AAM, Inc. entered into the First Amendment to the Amended and Restated Credit Agreement (the First Amendment), which covers the period from June 28, 2023 through the filing of our second quarter 2024 results, or earlier at AAM's option, subject to certain conditions (the Amendment Period). The First Amendment, among other things, increased the maximum levels of the total net leverage ratio covenant and reduced the minimum levels of cash interest expense coverage ratio covenant during the Amendment Period, modified certain categories of the applicable margin (determined based on the total net leverage ratio of Holdings) for the duration of the Amendment Period with respect to interest rates under the Term Loan A Facility and the Revolving Credit Facility, and modified certain covenants restricting the ability of Holdings, AAM, Inc. and certain subsidiaries of Holdings to create, incur, assume, or permit to exist certain additional indebtedness and liens and to make or agree to pay or make certain restricted payments, voluntary payments and distributions. The terms of the Term Loan B Facility under the Amended and Restated Credit Agreement, including maturity dates, interest rates and their applicable margins, remain unchanged. We paid debt issuance costs of $3.1 million in the three months ended June 30, 2023 related to the First Amendment. As of June 30, 2023, we have prepaid $23.0 million of the outstanding principal on our Term Loan A Facility and Term Loan B Facility. These payments satisfy our obligation for principal payments under the Term Loan A Facility and Term Loan B Facility for the next four quarters. In March 2022, Holdings and AAM, Inc. entered into the Amended and Restated Credit Agreement. The Amended and Restated Credit Agreement, among other things, increased the principal amount of the Term Loan A Facility to $520.0 million, extended the maturity date of the Term Loan A Facility and the Revolving Credit Facility each to March 11, 2027, and established the use under the Term Loan A Facility and Revolving Credit Facility of the Secured Overnight Financing Rate (SOFR) and the minimum Adjusted Term SOFR Rate for Eurodollar-based loans denominated in U.S. Dollars and the Sterling Overnight Index Average (SONIA) and the minimum adjusted daily simple SONIA for loans denominated in Sterling. We expensed $0.2 million of debt refinancing costs, paid accrued interest of $1.0 million, and paid debt issuance costs of $4.4 million in the six months ended June 30, 2022 related to the Amended and Restated Credit Agreement. Also in the first six months of 2022, we made voluntary prepayments of $50.0 million on our Term Loan B Facility. As a result, we expensed approximately $0.4 million for the write-off of a portion of the unamortized debt issuance costs that we had been amortizing over the expected life of this borrowing. The Senior Secured Credit Facilities provide back-up liquidity for our foreign credit facilities. We intend to use the availability of long-term financing under the Senior Secured Credit Facilities to refinance any current maturities related to such debt agreements that are not otherwise refinanced on a long-term basis in their local markets, except where otherwise reclassified to Current portion of long-term debt on our Condensed Consolidated Balance Sheet. Redemption of 6.25% Notes due 2026 In the first quarter of 2022, we used the proceeds from the upsized Term Loan A Facility to voluntarily redeem a portion of our 6.25% Notes due 2026. This resulted in a principal payment of $220.0 million and $0.2 million in accrued interest. We also expensed approximately $1.8 million for the write-off of a portion of the unamortized debt issuance costs that we had been amortizing over the expected life of the borrowing, and approximately $3.4 million for the payment of an early redemption premium. Repayment of Tekfor Group Indebtedness Upon the acquisition of Tekfor in June 2022, we assumed $23.4 million of existing Tekfor indebtedness, of which we repaid $10.7 million in the second quarter of 2022. Foreign credit facilities and Other We utilize local currency credit facilities to finance the operations of certain foreign subsidiaries. At June 30, 2023, $73.3 million was outstanding under our foreign credit facilities, as compared to $72.7 million at December 31, 2022. At June 30, 2023, an additional $72.8 million was available under our foreign credit facilities. Weighted-Average Interest Rate The weighted-average interest rate of our long-term debt outstanding was 6.6% at both June 30, 2023 and December 31, 2022.

Derivatives (Notes)

Derivatives (Notes)	6 Months Ended
	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	6. DERIVATIVES Our business and financial results are affected by fluctuations in global financial markets, including interest rates and currency exchange rates. Our hedging policy has been developed to manage these risks to an acceptable level based on management’s judgment of the appropriate trade-off between risk, opportunity and cost. We do not hold financial instruments for trading or speculative purposes. Currency derivative contracts From time to time, we use foreign currency forward contracts to reduce the effects of fluctuations in exchange rates relating to certain foreign currencies. As of June 30, 2023 and December 31, 2022, we had currency forward contracts outstanding with a total notional amount of $197.6 million and $179.9 million, respectively, that hedge our exposure to changes in foreign currency exchange rates for certain payroll expenses into the first quarter of 2026 and the purchase of certain direct and indirect inventory and other working capital items into the first quarter of 2024. Fixed-to-fixed cross-currency swap In 2022, we entered into a fixed-to-fixed cross-currency swap to reduce the variability of functional currency equivalent cash flows associated with changes in exchange rates on certain Euro-based intercompany loans. We had notional amounts outstanding under fixed-to-fixed cross-currency swaps of €200.0 million at both June 30, 2023 and December 31, 2022, which were equivalent to $218.0 million and $213.9 million, respectively. The fixed-to-fixed cross-currency swap hedges our exposure to changes in exchange rates on the intercompany loans into the second quarter of 2024. Variable-to-fixed interest rate swaps In 2022, and in the first quarter of 2023, we entered into variable-to-fixed interest rate swaps to reduce the variability of cash flows associated with interest payments on our variable rate debt. As of June 30, 2023, we have $700.0 million notional amount hedged in relation to our variable-to-fixed interest rate swaps into the third quarter of 2027, $200.0 million of which continues into the fourth quarter of 2029. The following table summarizes the reclassification of pre-tax derivative gains and losses into net income from accumulated other comprehensive income (loss) for those derivative instruments designated as cash flow hedges under Accounting Standards Codification (ASC) 815 - Derivatives and Hedging : Location Gain (Loss) Reclassified During Total of Financial Gain Expected of Gain (Loss) Three Months Ended Six Months Ended Statement to be Reclassified Reclassified into June 30, June 30, Line Item During the Net Income 2023 2022 2023 2022 2023 Next 12 Months (in millions) Currency forward contracts Cost of Goods Sold $ 5.5 $ 1.9 $ 8.8 $ 3.1 $ 2,725.8 $ 17.3 Fixed-to-fixed cross-currency swap Other Income (Expense), net (1.3) 11.9 (4.0) 17.9 3.2 0.3 Variable-to-fixed interest rate swap Interest Expense 0.2 (0.5) 0.8 (3.4) (100.7) 4.5 See Note 12 - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (AOCI) for amounts recognized in other comprehensive income during the three and six months ended June 30, 2023 and 2022. The following table summarizes the amount and location of gains and losses recognized in the Condensed Consolidated Statements of Income for those derivative instruments not designated as hedging instruments under ASC 815: Location Gain Recognized During Total of Financial of Gain Three Months Ended Six Months Ended Statement Recognized in June 30, June 30, Line Item Net Income 2023 2022 2023 2022 2023 (in millions) Currency forward contracts Other Income (Expense), net $ 1.6 $ 0.1 $ 3.7 $ 1.1 $ 3.2

Fair Value (Notes)

Fair Value (Notes)	6 Months Ended
	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	7. FAIR VALUE ASC 820 - Fair Value Measurement defines fair value as “the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.” The definition is based on an exit price rather than an entry price, regardless of whether the entity plans to hold or sell the asset. This guidance also establishes a fair value hierarchy to prioritize inputs used in measuring fair value as follows: • Level 1: Observable inputs such as quoted prices in active markets; • Level 2: Inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and • Level 3: Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions. Financial instruments The estimated carrying value of our financial assets and liabilities that are recognized at fair value on a recurring basis, using available market information and other observable data, are as follows: Fair Value June 30, 2023 December 31, 2022 Input (in millions) Balance Sheet Classification Cash equivalents $ 324.1 $ 363.6 Level 1 Prepaid expenses and other Cash flow hedges - currency forward contracts 17.3 8.2 Level 2 Cash flow hedges - variable-to-fixed interest rate swap 4.5 2.4 Level 2 Nondesignated - currency forward contracts 1.4 0.5 Level 2 Other assets and deferred charges Cash flow hedges - currency forward contracts 7.6 3.0 Level 2 Cash flow hedges - variable-to-fixed interest rate swap 15.1 8.5 Level 2 Investment in equity securities 1.9 1.9 Level 1 Accrued expenses and other Cash flow hedges - fixed-to-fixed cross-currency swap 6.5 — Level 2 Postretirement benefits and other long-term liabilities Cash flow hedges - fixed-to-fixed cross-currency swap — 1.5 Level 2 The carrying values of our cash, accounts receivable, accounts payable and accrued liabilities approximate their fair values due to the short-term maturities of these instruments. The carrying values of our borrowings under the foreign credit facilities approximate their fair value due to the frequent resetting of the interest rates. We have an investment in the equity securities of REE Automotive, an e-mobility company. These equity securities are measured at fair value each reporting period with changes in fair value reported through an unrealized gain or loss within Other income (expense), net in our Condensed Consolidated Statement of Income. As of June 30, 2023, our investment in REE shares was valued at $1.9 million based on a closing price on that date of $0.38 per share. We estimated the fair value of the amounts outstanding on our debt using available market information and other observable data, to be as follows: June 30, 2023 December 31, 2022 Carrying Amount Fair Value Carrying Amount Fair Value Input (in millions) Revolving Credit Facility $ — $ — $ 25.0 $ 25.0 Level 2 Term Loan A Facility 500.5 489.9 520.0 510.3 Level 2 Term Loan B Facility 664.9 662.4 675.0 658.1 Level 2 6.875% Notes due 2028 400.0 370.0 400.0 355.4 Level 2 6.50% Notes due 2027 500.0 471.3 500.0 452.5 Level 2 6.25% Notes due 2026 180.0 174.2 180.0 165.7 Level 2 5.00% Notes due 2029 600.0 499.5 600.0 474.9 Level 2

Employee Benefit Plans (Notes)

Employee Benefit Plans (Notes)	6 Months Ended
	Jun. 30, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Pension and Other Postretirement Benefits Disclosure [Text Block]	8. EMPLOYEE BENEFIT PLANS The components of net periodic benefit cost (credit) are as follows: Pension Benefits Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in millions) Service cost $ 0.2 $ 0.4 $ 0.5 $ 0.9 Interest cost 6.1 4.2 12.1 8.4 Expected asset return (7.3) (7.8) (14.5) (15.8) Amortized loss 1.1 1.9 2.1 3.8 Net periodic benefit cost (credit) $ 0.1 $ (1.3) $ 0.2 $ (2.7) Other Postretirement Benefits Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in millions) Service cost $ 0.1 $ — $ 0.1 $ 0.1 Interest cost 2.5 2.1 5.0 4.2 Amortized loss (gain) (2.1) 0.1 (4.2) 0.2 Amortized prior service credit (0.1) (0.2) (0.2) (0.4) Net periodic benefit cost $ 0.4 $ 2.0 $ 0.7 $ 4.1 The noncurrent liabilities associated with our pension and other postretirement benefit plans are classified as Postretirement benefits and other long-term liabilities on our Condensed Consolidated Balance Sheets. As of June 30, 2023 and December 31, 2022, we have a noncurrent pension liability of $69.6 million and $73.5 million, respectively. As of June 30, 2023 and December 31, 2022, we have a noncurrent other postretirement benefits liability of $302.0 million and $304.8 million, respectively. Due to the availability of our pre-funded pension balances (previous contributions in excess of prior required pension contributions), we expect our regulatory pension funding requirements in 2023 to be less than $1.0 million. We expect our cash payments for other postretirement benefit obligations in 2023, net of GM cost sharing, to be approximately $14.6 million.

Product Warranties (Notes)

Product Warranties (Notes)	6 Months Ended
	Jun. 30, 2023
Product Warranties Disclosures [Abstract]
Product Warranty Disclosure [Text Block]	9. PRODUCT WARRANTIES We record a liability for estimated warranty obligations at the dates our products are sold. These estimates are established using sales volumes and internal and external warranty data where there is no payment history and historical information about the average cost of warranty claims for customers with prior claims. We estimate our costs based on the contractual arrangements with our customers, existing customer warranty terms and internal and external warranty data, which includes a determination of our warranty claims and actions taken to improve product quality and minimize warranty claims. We continuously evaluate these estimates and our customers' administration of their warranty programs. We monitor actual warranty claim data and adjust the liability, as necessary, on a quarterly basis. The following table provides a reconciliation of changes in the product warranty liability: Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in millions) Beginning balance $ 61.4 $ 60.4 $ 54.1 $ 59.5 Accruals 3.6 3.9 12.3 7.9 Payments (2.5) (1.0) (4.3) (4.1) Adjustment to prior period accruals (0.4) (0.6) (0.4) (0.6) Foreign currency translation (0.4) (0.8) — (0.8) Ending balance $ 61.7 $ 61.9 $ 61.7 $ 61.9

Income Taxes (Notes)

Income Taxes (Notes)	6 Months Ended
	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	10. INCOME TAXES We adjust our effective tax rate each quarter based on our estimated annual effective tax rate. We also record the tax impact of certain discrete, unusual or infrequently occurring items, including changes in judgment about valuation allowances and the effects of changes in tax laws or rates on deferred tax balances, in the interim period in which they occur. In addition, jurisdictions with a projected loss for the year or a year-to-date loss where no tax benefit can be recognized are excluded from the estimated annual effective tax rate. The impact of such an exclusion could result in a higher or lower effective tax rate during a particular quarter, based upon the mix and timing of actual earnings versus annual projections. Our income tax expense and effective income tax rate for the three and six months ended June 30, 2023 and 2022 are as follows: Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in millions) Income tax expense $ 5.3 $ 0.6 $ 5.3 $ 3.6 Effective income tax rate 39.8 % 2.6 % 64.6 % 13.1 % During the three months ended June 30, 2023, we recognized an income tax benefit of approximately $3.2 million related to the release of a valuation allowance in a foreign jurisdiction. For the three and six months ended June 30, 2023, in computing our estimated annual effective tax rate, we recorded a full valuation allowance against the deferred tax asset on the current year estimated disallowed interest expense in the U.S. In addition, we recorded a valuation allowance against a portion of the deferred tax asset on prior year disallowed interest expense in the U.S. and reduced our liability for unrecognized income tax benefits and related interest and penalties as a result of a change in estimate on previously recorded unrecognized tax benefits in certain jurisdictions, resulting in net tax expense of $3.4 million during the six months ended June 30, 2023. Our effective income tax rates for the three and six months ended June 30, 2023 vary from our effective income tax rates for the three and six months ended June 30, 2022 primarily as a result of the impact of the discrete items noted above, the $11.6 million gain on bargain purchase of business that was recognized in both the three and six months ended June 30, 2022, which was not subject to income tax, and the mix of earnings on a jurisdictional basis. For the three and six months ended June 30, 2023, our effective income tax rates vary from the U.S. federal statutory rate primarily due to the unfavorable impact related to the disallowed interest expense deductions in the U.S., net of the impact of the reduction in unrecognized tax benefits, as well as favorable foreign tax rates and the impact of tax credits. For the three and six months ended June 30, 2022, our effective income tax rates vary from the U.S. federal statutory rate primarily due to the gain on bargain purchase of business that was recognized, a benefit from foreign derived intangible income deductions, the change in jurisdictional mix of earnings, favorable foreign tax rates and the impact of tax credits. In accordance with the guidance in ASC 740 - Income Taxes , we review the likelihood that we will realize the benefit of deferred tax assets and estimate whether recoverability of our deferred tax assets is "more likely than not" based on the available evidence. Due to the uncertainty associated with the extent and ultimate impact of the significant supply chain constraints affecting the automotive industry, including volatility in metal and commodity costs, higher utility costs, increased transportation costs, higher labor costs and labor shortages, we may experience lower than projected earnings in certain jurisdictions in future periods, and as a result, it is reasonably possible that changes in valuation allowances could be recognized in future periods and such changes could be material to our financial statements. Other Income Tax Matters During their examination of our 2015 U.S. federal income tax return, the Internal Revenue Service (IRS) asserted that income earned by a Luxembourg subsidiary from its Mexican branch operations should be categorized as foreign base company sales income (FBCSI) under Section 954(d) of the Internal Revenue Code and recognized currently as taxable income on our 2015 U.S. federal income tax return. As a result of this assertion, the IRS issued a Notice of Proposed Adjustment (NOPA). AAM disagreed with the NOPA, believes that the proposed adjustment is without merit and contested the matter through the IRS's administrative appeals process. No resolution was reached in the appeals process and in September 2022, the IRS issued a Notice of Deficiency. The IRS subsequently issued a Notice of Tax Due in December 2022 and AAM paid the assessed tax and interest of $10.1 million in January 2023. We have filed a claim for refund for the amount of tax and interest paid related to this matter for the 2015 tax year and, if necessary, will file suit in the U.S. Court of Federal Claims. We believe it is likely that we will be successful in ultimately defending our position. As such, we have not recorded any impact of the IRS’s proposed adjustment in our condensed consolidated financial statements as of, and for the three and six months ended, June 30, 2023, with the exception of the cash payment and associated income tax receivable of $10.1 million paid by AAM to the IRS in the first quarter of 2023. As of June 30, 2023, in the event AAM is not successful in defending its position, the potential additional income tax expense, including estimated interest charges, related to tax years 2015 through 2022, is estimated to be in the range of approximately $285 million to $335 million. In a matter of related interest, in May 2020, the U.S Tax Court ruled against another U.S. corporation, finding that the income it earned through a Mexican branch of its Luxembourg subsidiary corporation was FBCSI. In that situation, the taxpayer appealed the U.S. Tax Court decision to the U.S. Court of Appeals for the Sixth Circuit. In December 2021, the U.S. Court of Appeals affirmed, in a split decision, the Tax Court decision in favor of the IRS. In January 2022, the taxpayer in the above referenced matter filed a petition for rehearing and this petition was denied. Finally, in June 2022, the taxpayer filed a petition with the U.S. Supreme Court to review the judgment of the U.S. Court of Appeals for the Sixth Circuit and in November 2022 that petition was also denied. Notwithstanding the decisions rendered in that case, and because our position is based upon different facts and circumstances, including but not limited to, differences in structure, and different income tax regulations in effect for our tax years under examination, we continue to believe, after consultation with tax and legal counsel that it is more likely than not that our structure does not give rise to FBCSI.

Earnings (Loss) Per Share (Note

Earnings (Loss) Per Share (Notes)	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	11. EARNINGS PER SHARE (EPS) We present EPS using the two-class method. This method allocates undistributed earnings between common shares and non-vested share-based payment awards that entitle the holder to non-forfeitable dividend rights. Our participating securities are our non-vested restricted stock units. The following table sets forth the computation of our basic and diluted EPS available to shareholders of common stock (excluding participating securities): Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in millions, except per share data) Numerator Net income $ 8.0 $ 22.9 $ 2.9 $ 23.9 Less: Net income attributable to participating securities (0.1) (1.0) (0.1) (1.0) Net income attributable to common shareholders - Basic and Dilutive $ 7.9 $ 21.9 $ 2.8 $ 22.9 Denominators Basic common shares outstanding - Weighted-average shares outstanding 120.4 119.5 120.1 119.2 Less: Weighted-average participating securities (3.4) (5.0) (4.0) (4.8) Weighted-average common shares outstanding 117.0 114.5 116.1 114.4 Effect of dilutive securities - Dilutive stock-based compensation 0.2 0.8 0.2 0.6 Diluted shares outstanding - Adjusted weighted-average shares after assumed conversions 117.2 115.3 116.3 115.0 Basic EPS $ 0.07 $ 0.19 $ 0.02 $ 0.20 Diluted EPS $ 0.07 $ 0.19 $ 0.02 $ 0.20

Reclassifications out of Accumu

Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Notes)	6 Months Ended
	Jun. 30, 2023
Reclassifications out of Accumulated Other Comprehensive Income (Loss) [Abstract]
Disclosure of Reclassification Amount [Text Block]	12. RECLASSIFICATIONS OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) Reclassification adjustments and other activity impacting accumulated other comprehensive income (loss) during the six months ended June 30, 2023 and June 30, 2022 are as follows (in millions) : Defined Benefit Plans Foreign Currency Translation Adjustments Unrecognized Gain (Loss) on Cash Flow Hedges Total Balance at March 31, 2023 $ (147.6) $ (140.9) $ 23.7 $ (264.8) Other comprehensive income (loss) before reclassifications — (4.7) 25.2 20.5 Income tax effect of other comprehensive income (loss) before reclassifications — — (3.2) (3.2) Amounts reclassified from accumulated other comprehensive income (loss) (1.1) (a) — (4.4) (b) (5.5) Income taxes reclassified into net income 0.4 — (0.3) 0.1 Net change in accumulated other comprehensive income (loss) (0.7) (4.7) 17.3 11.9 Balance at June 30, 2023 $ (148.3) $ (145.6) $ 41.0 $ (252.9) Defined Benefit Plans Foreign Currency Translation Adjustments Unrecognized Gain (Loss) on Cash Flow Hedges Total Balance at March 31, 2022 $ (240.6) $ (105.3) $ 4.1 $ (341.8) Other comprehensive income (loss) before reclassifications — (42.3) 11.4 (30.9) Income tax effect of other comprehensive income (loss) before reclassifications — — (2.2) (2.2) Amounts reclassified from accumulated other comprehensive income (loss) 1.8 (a) — (13.3) (b) (11.5) Income taxes reclassified into net income (0.5) — 2.4 1.9 Net change in accumulated other comprehensive income (loss) 1.3 (42.3) (1.7) (42.7) Balance at June 30, 2022 $ (239.3) $ (147.6) $ 2.4 $ (384.5) (a) These amounts were reclassified from AOCI to Other income (expense), net for the three months ended June 30, 2023 and June 30, 2022. (b) The amounts reclassified from AOCI included $(5.5) million in cost of goods sold (COGS), $(0.2) million in interest expense and $1.3 million in Other income (expense), net for the three months ended June 30, 2023 and $(1.9) million in COGS, $0.5 million in interest expense and $(11.9) million in Other income (expense), net for the three months ended June 30, 2022. Defined Benefit Plans Foreign Currency Translation Adjustments Unrecognized Gain (Loss) on Cash Flow Hedges Total Balance at December 31, 2022 $ (146.9) $ (149.7) $ 21.2 $ (275.4) Other comprehensive income before reclassifications — 4.1 27.1 31.2 Income tax effect of other comprehensive income before reclassifications — — (1.0) (1.0) Amounts reclassified from accumulated other comprehensive income (loss) (2.3) (a) — (5.6) (b) (7.9) Income taxes reclassified into net income 0.9 — (0.7) 0.2 Net change in accumulated other comprehensive income (loss) (1.4) 4.1 19.8 22.5 Balance at June 30, 2023 $ (148.3) $ (145.6) $ 41.0 $ (252.9) Defined Benefit Plans Foreign Currency Translation Adjustments Unrecognized Gain (Loss) on Cash Flow Hedges Total Balance at December 31, 2021 $ (241.9) $ (111.3) $ (11.6) $ (364.8) Other comprehensive income (loss) before reclassifications — (36.3) 34.3 (2.0) Income tax effect of other comprehensive income (loss) before reclassifications — — (5.7) (5.7) Amounts reclassified from accumulated other comprehensive income (loss) 3.6 (a) — (17.6) (b) (14.0) Income taxes reclassified into net income (1.0) — 3.0 2.0 Net change in accumulated other comprehensive income (loss) 2.6 (36.3) 14.0 (19.7) Balance at June 30, 2022 $ (239.3) $ (147.6) $ 2.4 $ (384.5) (a) These amounts were reclassified from AOCI to Other income (expense), net for the six months ended June 30, 2023 and June 30, 2022. (b) The amounts reclassified from AOCI included $(8.8) million in cost of goods sold (COGS), $(0.8) million in interest expense and $4.0 million in Other income (expense), net for the six months ended June 30, 2023 and $(3.1) million in COGS, $3.4 million in interest expense and $(17.9) million in Other income (expense), net for the six months ended June 30, 2022.

Revenue from Contracts with Cus

Revenue from Contracts with Customers (Notes)	6 Months Ended
	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	13. REVENUE FROM CONTRACTS WITH CUSTOMERS Net sales recognized from contracts with customers, disaggregated by segment and geographical location, are presented in the following table for the three and six months ended June 30, 2023 and 2022. Net sales are attributed to regions based on the location of production. Intersegment sales have been excluded from the table. In the first quarter of 2023, we moved a plant location that was previously reported under our Driveline segment to our Metal Forming segment in order to better align our product and process technologies. The amounts in the table below for the three and six months ended June 30, 2022 have been recast to reflect this reorganization. Three Months Ended June 30, 2023 (in millions) Driveline Metal Forming Total North America $ 827.1 $ 332.6 $ 1,159.7 Asia 118.5 10.5 129.0 Europe 111.4 119.2 230.6 South America 29.4 22.0 51.4 Total $ 1,086.4 $ 484.3 $ 1,570.7 Three Months Ended June 30, 2022 Driveline Metal Forming Total North America $ 808.9 $ 319.1 $ 1,128.0 Asia 93.1 8.4 101.5 Europe 100.6 77.9 178.5 South America 22.1 8.2 30.3 Total $ 1,024.7 $ 413.6 $ 1,438.3 Six Months Ended June 30, 2023 Driveline Metal Forming Total North America $ 1,610.1 $ 661.1 $ 2,271.2 Asia 224.3 17.2 241.5 Europe 211.2 242.1 453.3 South America 54.6 44.0 98.6 Total $ 2,100.2 $ 964.4 $ 3,064.6 Six Months Ended June 30, 2022 Driveline Metal Forming Total North America $ 1,617.5 $ 637.7 $ 2,255.2 Asia 210.1 18.9 229.0 Europe 206.4 137.1 343.5 South America 36.1 10.7 46.8 Total $ 2,070.1 $ 804.4 $ 2,874.5 Contract Assets and Liabilities The following table summarizes our beginning and ending balances for accounts receivable and contract liabilities associated with our contracts with customers (in millions) : Accounts Receivable, Net Contract Liabilities (Current) Contract Liabilities (Long-term) December 31, 2022 $ 820.2 $ 28.1 $ 73.4 June 30, 2023 921.1 15.9 69.3 Increase/(decrease) $ 100.9 $ (12.2) $ (4.1) Contract liabilities relate to deferred revenue associated with various settlements and commercial agreements for which we have a future performance obligation to the customer. We recognize this deferred revenue into revenue over the life of the associated program as we satisfy our performance obligations to the customer. We do not have contract assets as defined in ASC 606. We amortized previously recorded contract liabilities into revenue as we satisfied performance obligations with our customers of approximately $21.5 million and $15.6 million for the six months ended June 30, 2023 and 2022, respectively.

Acquisitions and Dispositions (

Acquisitions and Dispositions (Notes)	6 Months Ended
	Jun. 30, 2023
Acquisitions and Dispositions [Abstract]
Acquisitions and Dispositions [Text Block]	14. ACQUISITIONS AND DISPOSITIONS Acquisition of Tekfor Group On June 1, 2022, our acquisition of Tekfor Group became effective and we paid a total purchase price of $94.4 million, which was funded entirely with cash on hand. Tekfor Group manufactures high-performance components, modules and fasteners, including traditional powertrain and driveline components (for both internal combustion and hybrid applications), and e-mobility components. Our acquisition of Tekfor contributes to diversifying our geographic and customer sales mix, while also increasing our electrification product portfolio. The acquisition of Tekfor Group was accounted for under the acquisition method under ASC 805 - Business Combinations with the purchase price allocated to the identifiable assets and liabilities of the acquired company based on the respective fair values of the assets and liabilities. The following represents the fair values of the assets acquired and liabilities assumed resulting from the acquisition (in millions) : Total consideration transferred $ 94.4 Cash and cash equivalents $ 14.3 Accounts receivable 33.7 Inventories 46.3 Prepaid expenses and other long-term assets 30.1 Deferred income tax assets 5.0 Property, plant and equipment 105.5 Total assets acquired $ 234.9 Accounts payable 33.5 Accrued expenses and other 28.1 Debt 23.4 Postretirement benefits and other long-term liabilities 41.9 Net assets acquired $ 108.0 Gain on bargain purchase of business $ 13.6 The gain on bargain purchase of business was primarily the result of macroeconomic factors such as the supply chain disruptions impacting the automotive industry, including the conflict between Russia and Ukraine, the semiconductor supply shortage, and increasing input costs, including materials, freight and utilities. We finalized the valuation of the assets and liabilities of Tekfor in the first quarter of 2023 as we concluded the customary post-closing reviews associated with the acquisition. There were no adjustments to the purchase price allocation in the three or six months ended June 30, 2023. Included in net sales and net income for the period from January 1, 2023 through June 30, 2023 was approximately $199 million and a loss of approximately $8 million, respectively, attributable to Tekfor. Included in net sales and net income for the period from the acquisition effective date on June 1, 2022 through June 30, 2022 was approximately $29 million and $7 million, respectively, attributable to Tekfor. The net income amount for the second quarter 2022 includes the gain on bargain purchase of business of $11.6 million, which was prior to subsequent measurement period adjustments resulting in the final gain on bargain purchase of business of $13.6 million, as well as a one-time expense of $5.0 million for the step-up of inventory to fair value. Unaudited Pro Forma Financial Information Unaudited pro forma net sales for AAM, on a combined basis with Tekfor for the six months ended June 30, 2022 were $3.0 billion, excluding Tekfor sales to AAM during the period. Unaudited pro forma net income for the six months ended June 30, 2022 was approximately $20.0 million. Unaudited pro forma earnings per share for the six months ended June 30, 2022 was $0.17 per share. The unaudited pro forma net income amount for the six months ended June 30, 2022 has been adjusted by approximately $4 million, net of tax, related to the step-up of inventory to fair value as a result of the acquisition, approximately $5 million, net of tax, for acquisition-related costs, and approximately $12 million for the gain on bargain purchase of business recognized, which was not subject to tax. This resulted in a net adjustment to pro forma net income of approximately $3 million for the first six months of 2022 as we are required to disclose the unaudited pro forma amounts as if the acquisition of Tekfor had been completed on January 1, 2021. The disclosure of unaudited pro forma net sales and earnings is for informational purposes only and does not purport to indicate the results that would actually have been obtained had the merger been completed on the assumed date for the periods presented, or which may be realized in the future.

Manufacturing Facility Fire and

Manufacturing Facility Fire and Insurance Recovery (Notes)	6 Months Ended
	Jun. 30, 2023
Insurance Recoveries [Abstract]
Manufacturing Facility Fire and Insurance Recovery	15 . MANUFACTURING FACILITY FIRE AND INSURANCE RECOVERY In the third quarter of 2020, a significant industrial fire occurred at our Malvern Manufacturing Facility in Ohio (Malvern Fire). All associates were evacuated safely and without injury and we were able to maintain continuity of supply to our customers without any significant disruptions. In the fourth quarter of 2022, we finalized the claim with our insurance providers. In January 2023, we collected the final $24.0 million associated with this claim, of which $7.0 million has been presented as an operating cash inflow and $17.0 million has been presented as an investing cash inflow in our Condensed Consolidated Statement of Cash Flows for the first six months of 2023. There was no impact on our Condensed Consolidated Statement of Income for the six months ended June 30, 2023 associated with the Malvern Fire.

Segment Reporting (Notes)

Segment Reporting (Notes)	6 Months Ended
	Jun. 30, 2023
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	16. SEGMENT REPORTING Our business is organized into Driveline and Metal Forming segments, with each representing a reportable segment under ASC 280 - Segment Reporting. The results of each segment are regularly reviewed by the chief operating decision maker to assess the performance of the segment and make decisions regarding the allocation of resources to the segments. Our product offerings by segment are as follows: • Driveline products consist primarily of front and rear axles, driveshafts, differential assemblies, clutch modules, balance shaft systems, disconnecting driveline technology, and electric and hybrid driveline products and systems for light trucks, sport utility vehicles (SUVs), crossover vehicles, passenger cars and commercial vehicles; and • Metal Forming products consist primarily of engine, transmission, driveline and safety-critical components for traditional internal combustion engine and electric vehicle architectures including light vehicles, commercial vehicles and off-highway vehicles, as well as products for industrial markets. We use Segment Adjusted EBITDA as the measure of earnings to assess the performance of each segment and determine the resources to be allocated to the segments. We define EBITDA to be earnings before interest expense, income taxes, depreciation and amortization. Segment Adjusted EBITDA is defined as EBITDA for our reportable segments excluding the impact of restructuring and acquisition-related costs, debt refinancing and redemption costs, loss on the sale of a business, pension settlements, unrealized gains or losses on equity securities, and non-recurring items. On June 1, 2022, our acquisition of Tekfor became effective and we began consolidating the results of Tekfor on that date, which are reported in our Metal Forming segment. In the first quarter of 2023, we moved a plant location that was previously reported under our Driveline segment to our Metal Forming segment in order to better align our product and process technologies. The amounts in the tables below for the three and six months ended June 30, 2022 have been recast to reflect this reorganization. The following tables represent information by reportable segment for the three and six months ended June 30, 2023 and 2022 (in millions) : Three Months Ended June 30, 2023 Driveline Metal Forming Total Sales $ 1,086.5 $ 634.2 $ 1,720.7 Less: Intersegment sales 0.1 149.9 150.0 Net external sales $ 1,086.4 $ 484.3 $ 1,570.7 Segment Adjusted EBITDA $ 152.1 $ 39.5 $ 191.6 Three Months Ended June 30, 2022 Driveline Metal Forming Total Sales $ 1,024.7 $ 557.7 $ 1,582.4 Less: Intersegment sales — 144.1 144.1 Net external sales $ 1,024.7 $ 413.6 $ 1,438.3 Segment Adjusted EBITDA $ 132.4 $ 62.7 $ 195.1 Six Months Ended June 30, 2023 Driveline Metal Forming Total Sales $ 2,100.3 $ 1,253.3 $ 3,353.6 Less: Intersegment sales 0.1 288.9 289.0 Net external sales $ 2,100.2 $ 964.4 $ 3,064.6 Segment Adjusted EBITDA $ 266.2 $ 100.8 $ 367.0 Six Months Ended June 30, 2022 Driveline Metal Forming Total Sales $ 2,070.1 $ 1,082.8 $ 3,152.9 Less: Intersegment sales — 278.4 278.4 Net external sales $ 2,070.1 $ 804.4 $ 2,874.5 Segment Adjusted EBITDA $ 255.2 $ 136.0 $ 391.2 The following table represents a reconciliation of Total Segment Adjusted EBITDA to consolidated income before income taxes for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in millions) Total segment adjusted EBITDA $ 191.6 $ 195.1 $ 367.0 $ 391.2 Interest expense (50.2) (42.7) (100.7) (87.4) Depreciation and amortization (120.5) (121.9) (245.4) (242.3) Restructuring and acquisition-related costs (7.9) (9.6) (12.7) (18.5) Unrealized gain (loss) on equity securities 0.3 (3.7) — (21.7) Debt refinancing and redemption costs — (0.2) — (5.8) Non-recurring items: Malvern Fire insurance recoveries (charges), net — (0.1) — 5.4 Acquisition-related fair value inventory adjustment — (5.0) — (5.0) Gain on bargain purchase of business — 11.6 — 11.6 Income before income taxes $ 13.3 $ 23.5 $ 8.2 $ 27.5

Organization and Basis of Pre_2

Organization and Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation We have prepared the accompanying interim condensed consolidated financial statements in accordance with the instructions to Form 10-Q under the Securities Exchange Act of 1934. These condensed consolidated financial statements are unaudited but include all normal recurring adjustments, which we consider necessary for a fair presentation of the information set forth herein. Results of operations for the periods presented are not necessarily indicative of the results for the full fiscal year. The balance sheet at December 31, 2022 presented herein has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States of America (GAAP) for complete consolidated financial statements. In order to prepare the accompanying interim condensed consolidated financial statements, we are required to make estimates and assumptions that affect the reported amounts and disclosures in our interim condensed consolidated financial statements. These estimates and assumptions are impacted by risks and uncertainties, including those associated with the significant disruptions in the supply chain that continue to impact the automotive industry, including volatility in metal, commodity and utility costs, shortages of certain raw materials and components, including semiconductor chips, increased transportation costs, higher labor costs and labor shortages. While we have made estimates and assumptions based on the facts and circumstances available as of the date of this report, the full impact of these matters cannot be predicted, and actual results could differ materially from those estimates and assumptions. For further information, refer to the audited consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended December 31, 2022.

Restructuring and Acquisition_2

Restructuring and Acquisition-Related Costs (Tables)	6 Months Ended
	Jun. 30, 2023
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs [Table Text Block]	A summary of our restructuring activity for the first six months of 2023 and 2022 is shown below: Severance Charges Implementation Costs Total (in millions) Accrual at December 31, 2021 $ 0.7 $ 2.7 $ 3.4 Charges 1.3 10.3 11.6 Cash utilization (1.2) (10.6) (11.8) Accrual at June 30, 2022 $ 0.8 $ 2.4 $ 3.2 Accrual at December 31, 2022 $ 2.4 $ 1.4 $ 3.8 Charges 1.4 9.3 10.7 Cash utilization (2.1) (7.4) (9.5) Accrual at June 30, 2023 $ 1.7 $ 3.3 $ 5.0
Business Combination, Separately Recognized Transactions [Table Text Block]	The following table represents a summary of acquisition-related charges incurred primarily related to our acquisition of Tekfor, as well as integration costs incurred for acquisitions: Acquisition-Related Costs Integration Expenses Total (in millions) Charges for the six months ended June 30, 2023 $ — $ 2.0 $ 2.0 Charges for the six months ended June 30, 2022 5.7 1.2 6.9

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2023
Inventory Disclosure [Abstract]
Schedule of Inventory, Current [Table Text Block]	Inventories consist of the following: June 30, 2023 December 31, 2022 (in millions) Raw materials and work-in-progress $ 423.5 $ 398.9 Finished goods 88.0 92.5 Gross inventories 511.5 491.4 Inventory valuation reserves (34.4) (27.5) Inventories, net $ 477.1 $ 463.9

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill [Table Text Block]	The following table provides a reconciliation of changes in goodwill for the six months ended June 30, 2023: Consolidated (in millions) Balance at December 31, 2022 $ 181.6 Foreign currency translation 0.1 Balance at June 30, 2023 $ 181.7
Schedule of Finite-Lived Intangible Assets [Table Text Block]	The following table provides a reconciliation of the gross carrying amount and associated accumulated amortization for AAM's other intangible assets, which are all subject to amortization: June 30, December 31, 2023 2022 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount (in millions) Capitalized computer software $ 52.9 $ (46.2) $ 6.7 $ 52.2 $ (43.2) $ 9.0 Customer platforms 856.2 (396.4) 459.8 856.2 (364.7) 491.5 Customer relationships 53.0 (21.4) 31.6 53.0 (19.7) 33.3 Technology and other 154.0 (77.9) 76.1 154.1 (71.7) 82.4 Total $ 1,116.1 $ (541.9) $ 574.2 $ 1,115.5 $ (499.3) $ 616.2

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	Long-term debt consists of the following: June 30, 2023 December 31, 2022 (in millions) Revolving Credit Facility $ — $ 25.0 Term Loan A Facility 500.5 520.0 Term Loan B Facility 664.9 675.0 6.875% Notes due 2028 400.0 400.0 6.50% Notes due 2027 500.0 500.0 6.25% Notes due 2026 180.0 180.0 5.00% Notes due 2029 600.0 600.0 Foreign credit facilities and other 73.3 72.7 Total debt 2,918.7 2,972.7 Less: Current portion of long-term debt 16.3 75.9 Long-term debt 2,902.4 2,896.8 Less: Debt issuance costs 48.5 51.7 Long-term debt, net $ 2,853.9 $ 2,845.1

Derivatives (Tables)

Derivatives (Tables)	6 Months Ended
	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]	The following table summarizes the reclassification of pre-tax derivative gains and losses into net income from accumulated other comprehensive income (loss) for those derivative instruments designated as cash flow hedges under Accounting Standards Codification (ASC) 815 - Derivatives and Hedging : Location Gain (Loss) Reclassified During Total of Financial Gain Expected of Gain (Loss) Three Months Ended Six Months Ended Statement to be Reclassified Reclassified into June 30, June 30, Line Item During the Net Income 2023 2022 2023 2022 2023 Next 12 Months (in millions) Currency forward contracts Cost of Goods Sold $ 5.5 $ 1.9 $ 8.8 $ 3.1 $ 2,725.8 $ 17.3 Fixed-to-fixed cross-currency swap Other Income (Expense), net (1.3) 11.9 (4.0) 17.9 3.2 0.3 Variable-to-fixed interest rate swap Interest Expense 0.2 (0.5) 0.8 (3.4) (100.7) 4.5 See Note 12 - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (AOCI) for amounts recognized in other comprehensive income during the three and six months ended June 30, 2023 and 2022. The following table summarizes the amount and location of gains and losses recognized in the Condensed Consolidated Statements of Income for those derivative instruments not designated as hedging instruments under ASC 815: Location Gain Recognized During Total of Financial of Gain Three Months Ended Six Months Ended Statement Recognized in June 30, June 30, Line Item Net Income 2023 2022 2023 2022 2023 (in millions) Currency forward contracts Other Income (Expense), net $ 1.6 $ 0.1 $ 3.7 $ 1.1 $ 3.2

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The estimated carrying value of our financial assets and liabilities that are recognized at fair value on a recurring basis, using available market information and other observable data, are as follows: Fair Value June 30, 2023 December 31, 2022 Input (in millions) Balance Sheet Classification Cash equivalents $ 324.1 $ 363.6 Level 1 Prepaid expenses and other Cash flow hedges - currency forward contracts 17.3 8.2 Level 2 Cash flow hedges - variable-to-fixed interest rate swap 4.5 2.4 Level 2 Nondesignated - currency forward contracts 1.4 0.5 Level 2 Other assets and deferred charges Cash flow hedges - currency forward contracts 7.6 3.0 Level 2 Cash flow hedges - variable-to-fixed interest rate swap 15.1 8.5 Level 2 Investment in equity securities 1.9 1.9 Level 1 Accrued expenses and other Cash flow hedges - fixed-to-fixed cross-currency swap 6.5 — Level 2 Postretirement benefits and other long-term liabilities Cash flow hedges - fixed-to-fixed cross-currency swap — 1.5 Level 2
Fair Value, Financial Instruments not Carried at Fair Value [Table Text Block]	We estimated the fair value of the amounts outstanding on our debt using available market information and other observable data, to be as follows: June 30, 2023 December 31, 2022 Carrying Amount Fair Value Carrying Amount Fair Value Input (in millions) Revolving Credit Facility $ — $ — $ 25.0 $ 25.0 Level 2 Term Loan A Facility 500.5 489.9 520.0 510.3 Level 2 Term Loan B Facility 664.9 662.4 675.0 658.1 Level 2 6.875% Notes due 2028 400.0 370.0 400.0 355.4 Level 2 6.50% Notes due 2027 500.0 471.3 500.0 452.5 Level 2 6.25% Notes due 2026 180.0 174.2 180.0 165.7 Level 2 5.00% Notes due 2029 600.0 499.5 600.0 474.9 Level 2

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Schedule of Net Benefit (Credits) Costs [Table Text Block]	The components of net periodic benefit cost (credit) are as follows: Pension Benefits Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in millions) Service cost $ 0.2 $ 0.4 $ 0.5 $ 0.9 Interest cost 6.1 4.2 12.1 8.4 Expected asset return (7.3) (7.8) (14.5) (15.8) Amortized loss 1.1 1.9 2.1 3.8 Net periodic benefit cost (credit) $ 0.1 $ (1.3) $ 0.2 $ (2.7) Other Postretirement Benefits Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in millions) Service cost $ 0.1 $ — $ 0.1 $ 0.1 Interest cost 2.5 2.1 5.0 4.2 Amortized loss (gain) (2.1) 0.1 (4.2) 0.2 Amortized prior service credit (0.1) (0.2) (0.2) (0.4) Net periodic benefit cost $ 0.4 $ 2.0 $ 0.7 $ 4.1

Product Warranties (Tables)

Product Warranties (Tables)	6 Months Ended
	Jun. 30, 2023
Product Warranties Disclosures [Abstract]
Schedule of Product Warranty Liability [Table Text Block]	The following table provides a reconciliation of changes in the product warranty liability: Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in millions) Beginning balance $ 61.4 $ 60.4 $ 54.1 $ 59.5 Accruals 3.6 3.9 12.3 7.9 Payments (2.5) (1.0) (4.3) (4.1) Adjustment to prior period accruals (0.4) (0.6) (0.4) (0.6) Foreign currency translation (0.4) (0.8) — (0.8) Ending balance $ 61.7 $ 61.9 $ 61.7 $ 61.9

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense (Benefit) and Income Tax Rate	Our income tax expense and effective income tax rate for the three and six months ended June 30, 2023 and 2022 are as follows: Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in millions) Income tax expense $ 5.3 $ 0.6 $ 5.3 $ 3.6 Effective income tax rate 39.8 % 2.6 % 64.6 % 13.1 %

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table sets forth the computation of our basic and diluted EPS available to shareholders of common stock (excluding participating securities): Three Months Ended Six Months Ended June 30, June 30, 2023 2022 2023 2022 (in millions, except per share data) Numerator Net income $ 8.0 $ 22.9 $ 2.9 $ 23.9 Less: Net income attributable to participating securities (0.1) (1.0) (0.1) (1.0) Net income attributable to common shareholders - Basic and Dilutive $ 7.9 $ 21.9 $ 2.8 $ 22.9 Denominators Basic common shares outstanding - Weighted-average shares outstanding 120.4 119.5 120.1 119.2 Less: Weighted-average participating securities (3.4) (5.0) (4.0) (4.8) Weighted-average common shares outstanding 117.0 114.5 116.1 114.4 Effect of dilutive securities - Dilutive stock-based compensation 0.2 0.8 0.2 0.6 Diluted shares outstanding - Adjusted weighted-average shares after assumed conversions 117.2 115.3 116.3 115.0 Basic EPS $ 0.07 $ 0.19 $ 0.02 $ 0.20 Diluted EPS $ 0.07 $ 0.19 $ 0.02 $ 0.20

Reclassifications out of Accu_2

Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2023
Reclassifications out of Accumulated Other Comprehensive Income (Loss) [Abstract]
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	Reclassification adjustments and other activity impacting accumulated other comprehensive income (loss) during the six months ended June 30, 2023 and June 30, 2022 are as follows (in millions) : Defined Benefit Plans Foreign Currency Translation Adjustments Unrecognized Gain (Loss) on Cash Flow Hedges Total Balance at March 31, 2023 $ (147.6) $ (140.9) $ 23.7 $ (264.8) Other comprehensive income (loss) before reclassifications — (4.7) 25.2 20.5 Income tax effect of other comprehensive income (loss) before reclassifications — — (3.2) (3.2) Amounts reclassified from accumulated other comprehensive income (loss) (1.1) (a) — (4.4) (b) (5.5) Income taxes reclassified into net income 0.4 — (0.3) 0.1 Net change in accumulated other comprehensive income (loss) (0.7) (4.7) 17.3 11.9 Balance at June 30, 2023 $ (148.3) $ (145.6) $ 41.0 $ (252.9) Defined Benefit Plans Foreign Currency Translation Adjustments Unrecognized Gain (Loss) on Cash Flow Hedges Total Balance at March 31, 2022 $ (240.6) $ (105.3) $ 4.1 $ (341.8) Other comprehensive income (loss) before reclassifications — (42.3) 11.4 (30.9) Income tax effect of other comprehensive income (loss) before reclassifications — — (2.2) (2.2) Amounts reclassified from accumulated other comprehensive income (loss) 1.8 (a) — (13.3) (b) (11.5) Income taxes reclassified into net income (0.5) — 2.4 1.9 Net change in accumulated other comprehensive income (loss) 1.3 (42.3) (1.7) (42.7) Balance at June 30, 2022 $ (239.3) $ (147.6) $ 2.4 $ (384.5) (a) These amounts were reclassified from AOCI to Other income (expense), net for the three months ended June 30, 2023 and June 30, 2022. (b) The amounts reclassified from AOCI included $(5.5) million in cost of goods sold (COGS), $(0.2) million in interest expense and $1.3 million in Other income (expense), net for the three months ended June 30, 2023 and $(1.9) million in COGS, $0.5 million in interest expense and $(11.9) million in Other income (expense), net for the three months ended June 30, 2022. Defined Benefit Plans Foreign Currency Translation Adjustments Unrecognized Gain (Loss) on Cash Flow Hedges Total Balance at December 31, 2022 $ (146.9) $ (149.7) $ 21.2 $ (275.4) Other comprehensive income before reclassifications — 4.1 27.1 31.2 Income tax effect of other comprehensive income before reclassifications — — (1.0) (1.0) Amounts reclassified from accumulated other comprehensive income (loss) (2.3) (a) — (5.6) (b) (7.9) Income taxes reclassified into net income 0.9 — (0.7) 0.2 Net change in accumulated other comprehensive income (loss) (1.4) 4.1 19.8 22.5 Balance at June 30, 2023 $ (148.3) $ (145.6) $ 41.0 $ (252.9) Defined Benefit Plans Foreign Currency Translation Adjustments Unrecognized Gain (Loss) on Cash Flow Hedges Total Balance at December 31, 2021 $ (241.9) $ (111.3) $ (11.6) $ (364.8) Other comprehensive income (loss) before reclassifications — (36.3) 34.3 (2.0) Income tax effect of other comprehensive income (loss) before reclassifications — — (5.7) (5.7) Amounts reclassified from accumulated other comprehensive income (loss) 3.6 (a) — (17.6) (b) (14.0) Income taxes reclassified into net income (1.0) — 3.0 2.0 Net change in accumulated other comprehensive income (loss) 2.6 (36.3) 14.0 (19.7) Balance at June 30, 2022 $ (239.3) $ (147.6) $ 2.4 $ (384.5) (a) These amounts were reclassified from AOCI to Other income (expense), net for the six months ended June 30, 2023 and June 30, 2022. (b) The amounts reclassified from AOCI included $(8.8) million in cost of goods sold (COGS), $(0.8) million in interest expense and $4.0 million in Other income (expense), net for the six months ended June 30, 2023 and $(3.1) million in COGS, $3.4 million in interest expense and $(17.9) million in Other income (expense), net for the six months ended June 30, 2022.

Disaggregation of Revenue (Tabl

Disaggregation of Revenue (Tables)	6 Months Ended
	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	Net sales recognized from contracts with customers, disaggregated by segment and geographical location, are presented in the following table for the three and six months ended June 30, 2023 and 2022. Net sales are attributed to regions based on the location of production. Intersegment sales have been excluded from the table. In the first quarter of 2023, we moved a plant location that was previously reported under our Driveline segment to our Metal Forming segment in order to better align our product and process technologies. The amounts in the table below for the three and six months ended June 30, 2022 have been recast to reflect this reorganization. Three Months Ended June 30, 2023 (in millions) Driveline Metal Forming Total North America $ 827.1 $ 332.6 $ 1,159.7 Asia 118.5 10.5 129.0 Europe 111.4 119.2 230.6 South America 29.4 22.0 51.4 Total $ 1,086.4 $ 484.3 $ 1,570.7 Three Months Ended June 30, 2022 Driveline Metal Forming Total North America $ 808.9 $ 319.1 $ 1,128.0 Asia 93.1 8.4 101.5 Europe 100.6 77.9 178.5 South America 22.1 8.2 30.3 Total $ 1,024.7 $ 413.6 $ 1,438.3 Six Months Ended June 30, 2023 Driveline Metal Forming Total North America $ 1,610.1 $ 661.1 $ 2,271.2 Asia 224.3 17.2 241.5 Europe 211.2 242.1 453.3 South America 54.6 44.0 98.6 Total $ 2,100.2 $ 964.4 $ 3,064.6 Six Months Ended June 30, 2022 Driveline Metal Forming Total North America $ 1,617.5 $ 637.7 $ 2,255.2 Asia 210.1 18.9 229.0 Europe 206.4 137.1 343.5 South America 36.1 10.7 46.8 Total $ 2,070.1 $ 804.4 $ 2,874.5 Contract Assets and Liabilities The following table summarizes our beginning and ending balances for accounts receivable and contract liabilities associated with our contracts with customers (in millions) : Accounts Receivable, Net Contract Liabilities (Current) Contract Liabilities (Long-term) December 31, 2022 $ 820.2 $ 28.1 $ 73.4 June 30, 2023 921.1 15.9 69.3 Increase/(decrease) $ 100.9 $ (12.2) $ (4.1)

Acquisitions and Dispositions_2

Acquisitions and Dispositions (Tables)	6 Months Ended
	Jun. 30, 2023
Business Acquisition [Line Items]
Schedule of Business Acquisitions, by Acquisition	The following represents the fair values of the assets acquired and liabilities assumed resulting from the acquisition (in millions) : Total consideration transferred $ 94.4 Cash and cash equivalents $ 14.3 Accounts receivable 33.7 Inventories 46.3 Prepaid expenses and other long-term assets 30.1 Deferred income tax assets 5.0 Property, plant and equipment 105.5 Total assets acquired $ 234.9 Accounts payable 33.5 Accrued expenses and other 28.1 Debt 23.4 Postretirement benefits and other long-term liabilities 41.9 Net assets acquired $ 108.0 Gain on bargain purchase of business $ 13.6

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2023
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	The following tables represent information by reportable segment for the three and six months ended June 30, 2023 and 2022 (in millions) : Three Months Ended June 30, 2023 Driveline Metal Forming Total Sales $ 1,086.5 $ 634.2 $ 1,720.7 Less: Intersegment sales 0.1 149.9 150.0 Net external sales $ 1,086.4 $ 484.3 $ 1,570.7 Segment Adjusted EBITDA $ 152.1 $ 39.5 $ 191.6 Three Months Ended June 30, 2022 Driveline Metal Forming Total Sales $ 1,024.7 $ 557.7 $ 1,582.4 Less: Intersegment sales — 144.1 144.1 Net external sales $ 1,024.7 $ 413.6 $ 1,438.3 Segment Adjusted EBITDA $ 132.4 $ 62.7 $ 195.1 Six Months Ended June 30, 2023 Driveline Metal Forming Total Sales $ 2,100.3 $ 1,253.3 $ 3,353.6 Less: Intersegment sales 0.1 288.9 289.0 Net external sales $ 2,100.2 $ 964.4 $ 3,064.6 Segment Adjusted EBITDA $ 266.2 $ 100.8 $ 367.0 Six Months Ended June 30, 2022 Driveline Metal Forming Total Sales $ 2,070.1 $ 1,082.8 $ 3,152.9 Less: Intersegment sales — 278.4 278.4 Net external sales $ 2,070.1 $ 804.4 $ 2,874.5 Segment Adjusted EBITDA $ 255.2 $ 136.0 $ 391.2
Reconciliation of Total Segment Adjusted EBITDA to Income Before Income Taxes [Table Text Block]	The following table represents a reconciliation of Total Segment Adjusted EBITDA to consolidated income before income taxes for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in millions) Total segment adjusted EBITDA $ 191.6 $ 195.1 $ 367.0 $ 391.2 Interest expense (50.2) (42.7) (100.7) (87.4) Depreciation and amortization (120.5) (121.9) (245.4) (242.3) Restructuring and acquisition-related costs (7.9) (9.6) (12.7) (18.5) Unrealized gain (loss) on equity securities 0.3 (3.7) — (21.7) Debt refinancing and redemption costs — (0.2) — (5.8) Non-recurring items: Malvern Fire insurance recoveries (charges), net — (0.1) — 5.4 Acquisition-related fair value inventory adjustment — (5.0) — (5.0) Gain on bargain purchase of business — 11.6 — 11.6 Income before income taxes $ 13.3 $ 23.5 $ 8.2 $ 27.5

Organization and Basis of Pre_3

Organization and Basis of Presentation (Details)	Jun. 30, 2023 Facilities Countries
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of Facilities | Facilities	80
Number of Countries in which Entity Operates | Countries	18

Restructuring and Acquisition_3

Restructuring and Acquisition-Related Costs (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Restructuring Reserve [Roll Forward]
Restructuring reserve	$ 3.8	$ 3.4
Charges	10.7	11.6
Cash utilization	(9.5)	(11.8)
Restructuring reserve	5	3.2
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve	2.4	0.7
Charges	1.4	1.3
Cash utilization	(2.1)	(1.2)
Restructuring reserve	1.7	0.8
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve	1.4	2.7
Charges	9.3	10.3
Cash utilization	(7.4)	(10.6)
Restructuring reserve	$ 3.3	$ 2.4

Restructuring Reserve Narrative

Restructuring Reserve Narrative (Details) - USD ($) $ in Millions	6 Months Ended		25 Months Ended	42 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2023	Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 10.7	$ 11.6
Minimum [Member] | Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost					$ 10
Maximum [Member] | Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost					$ 20
Driveline [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		1
Metal Forming [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		6.1
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	1.4	1.3
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	9.3	$ 10.3
2020 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	4.9			$ 105.5
Emporium, Pennsylvannia
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	4.4		$ 16.5
Tekfor Group
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 1.4

Business Combinations, Separate

Business Combinations, Separately Recognized Transactions Table (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Restructuring and Related Activities [Abstract]
Acquisition related costs			$ 0	$ 5.7
Integration expenses			2	1.2
Total acquisition and integration charges			2	6.9
Restructuring and acquisition-related costs	$ 7.9	$ 9.6	$ 12.7	$ 18.5

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Inventory [Line Items]
Raw materials and work-in-progress	$ 423.5	$ 398.9
Finished goods	88	92.5
Gross inventories	511.5	491.4
Inventory valuation reserves	(34.4)	(27.5)
Inventories, net	$ 477.1	$ 463.9

Goodwill Rollforward (Details)

Goodwill Rollforward (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)
Goodwill [Roll Forward]
Goodwill	$ 181.6
Foreign currency translation	0.1
Goodwill	$ 181.7

Goodwill Narrative (Details)

Goodwill Narrative (Details) $ in Millions	Jun. 30, 2023 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Impaired, Accumulated Impairment Loss	$ 1,435.5

Intangible Assets Table (Detail

Intangible Assets Table (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,116.1		$ 1,116.1		$ 1,115.5
Accumulated Amortization	(541.9)		(541.9)		(499.3)
Net Carrying Amount	574.2		574.2		616.2
Amortization of intangible assets	21.4	$ 21.4	42.8	$ 42.9
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Current Fiscal Year	80		80
Finite-Lived Intangible Assets, Amortization Expense, Year Two	80		80
Finite-Lived Intangible Assets, Amortization Expense, Year Three	80		80
Finite-Lived Intangible Assets, Amortization Expense, Year Four	80		80
Finite-Lived Intangible Assets, Amortization Expense, Year Five	80		80
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Current Fiscal Year	85		85
Finite-Lived Intangible Assets, Amortization Expense, Year Two	85		85
Finite-Lived Intangible Assets, Amortization Expense, Year Three	85		85
Finite-Lived Intangible Assets, Amortization Expense, Year Four	85		85
Finite-Lived Intangible Assets, Amortization Expense, Year Five	85		85
Capitalized Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	52.9		52.9		52.2
Accumulated Amortization	(46.2)		(46.2)		(43.2)
Net Carrying Amount	6.7		6.7		9
Customer Platforms - Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	856.2		856.2		856.2
Accumulated Amortization	(396.4)		(396.4)		(364.7)
Net Carrying Amount	459.8		459.8		491.5
Customer Relationships - Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	53		53		53
Accumulated Amortization	(21.4)		(21.4)		(19.7)
Net Carrying Amount	31.6		31.6		33.3
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	154		154		154.1
Accumulated Amortization	(77.9)		(77.9)		(71.7)
Net Carrying Amount	$ 76.1		$ 76.1		$ 82.4

Schedule of Long-Term Debt (Det

Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total debt	$ 2,918.7	$ 2,972.7
Current portion of long-term debt	16.3	75.9
Long-term debt	2,902.4	2,896.8
Long-term debt, net	2,853.9	2,845.1
Term Loan A [Member]
Debt Instrument [Line Items]
Secured Debt	500.5	520
Term Loan B [Member]
Debt Instrument [Line Items]
Secured Debt	664.9	675
6.875% Notes [Member]
Debt Instrument [Line Items]
Unsecured Debt	400	400
6.50% Notes [Member]
Debt Instrument [Line Items]
Unsecured Debt	500	500
6.25% Notes Due 2026 [Member]
Debt Instrument [Line Items]
Unsecured Debt	180	180
5.00% Notes due 2029 [Member]
Debt Instrument [Line Items]
Unsecured Debt	600	600
Total Debt Instruments excluding Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Issuance Costs	48.5	51.7
Multi Currency Credit Facility Member
Debt Instrument [Line Items]
Long-term Line of Credit	0	25
Foreign Credit Facilities and Other
Debt Instrument [Line Items]
Long-term Line of Credit	$ 73.3	$ 72.7

Senior Secured Credit Facilitie

Senior Secured Credit Facilities Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Mar. 11, 2022
Debt Instrument [Line Items]
Payments of Revolving Credit Facility			$ 25	$ 0
Payments of Debt Issuance Costs			3.1	4.4
Term Loan A [Member]
Debt Instrument [Line Items]
Secured Debt	$ 500.5		500.5		$ 520
Term Loan B [Member]
Debt Instrument [Line Items]
Secured Debt	664.9		664.9		$ 675
Multi Currency Credit Facility Member
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	891.2		891.2
Letters of Credit Outstanding, Amount	33.8		$ 33.8
Payments of Revolving Credit Facility		$ 25
Secured Debt [Member] | First Amendment to the Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Payments of Debt Issuance Costs	3.1
Secured Debt [Member] | Term Loan A & Term Loan B
Debt Instrument [Line Items]
Repayments of Secured Debt	$ 23
Secured Debt [Member] | Term Loan A [Member]
Debt Instrument [Line Items]
Secured Debt						$ 520
Secured Debt [Member] | Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Payments of Debt Issuance Costs				4.4
Payments of Debt Restructuring Costs				0.2
Interest Paid, Including Capitalized Interest, Operating and Investing Activities				1
Secured Debt [Member] | Term Loan B [Member]
Debt Instrument [Line Items]
Repayments of Secured Debt				50
Write off of Deferred Debt Issuance Cost				$ 0.4

Other Debt Disclosures Narrativ

Other Debt Disclosures Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Dec. 31, 2022	Jun. 01, 2022
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate, at Point in Time			6.60%	6.60%
Tekfor Group
Debt Instrument [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt					$ 23.4
Unsecured Debt [Member] | Tekfor Group
Debt Instrument [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt					$ 23.4
Unsecured Debt [Member] | 6.25% Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.25%
Repayments of Unsecured Debt		$ 220
Interest Paid, Including Capitalized Interest, Operating and Investing Activities		0.2
Write off of Deferred Debt Issuance Cost		1.8
Redemption Premium		$ 3.4
Unsecured Debt [Member] | Tekfor Group Debt
Debt Instrument [Line Items]
Repayments of Unsecured Debt	$ 10.7
Foreign Credit Facilities [Member]
Debt Instrument [Line Items]
Long-term Line of Credit			$ 73.3	$ 72.7
Debt Instrument, Unused Borrowing Capacity, Amount			$ 72.8

Derivatives Narrative (Details)

Derivatives Narrative (Details) € in Millions, $ in Millions	Jun. 30, 2023 USD ($)	Jun. 30, 2023 EUR (€)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 EUR (€)
Foreign Currency Forward & Foreign Currency Option Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 197.6		$ 179.9
Currency Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	218	€ 200	$ 213.9	€ 200
Interest Rate Swaps Through Q3 2027 | Debt [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	700
Interest Rate Swap Q3 2027 Through Q4 2029 | Debt [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 200

Schedule of Derivatives (Detail

Schedule of Derivatives (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Cost of goods sold	$ 1,392.5	$ 1,264.8	$ 2,725.8	$ 2,514.2
Other income (expense), net	(0.5)	(2.4)	3.2	(3.4)
Interest expense	(50.2)	(42.7)	(100.7)	(87.4)
Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 1.6	$ 0.1	$ 3.7	$ 1.1
Description of Location of Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments in Financial Statements	Other income (expense), net	Other income (expense), net	Other income (expense), net	Other income (expense), net
Foreign Exchange Forward [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Income Statement Location Gain (Loss) Reclassified from Accumulated OCI	Cost of goods sold	Cost of goods sold	Cost of goods sold	Cost of goods sold
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	$ 5.5	$ 1.9	$ 8.8	$ 3.1
Foreign Exchange Forward [Member] | Cost of Sales [Member] | Cash Flow Hedging [Member] | Forecast [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedge gain (loss) to be reclassified within twelve months					$ 17.3
Currency Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Income Statement Location Gain (Loss) Reclassified from Accumulated OCI	Other income (expense), net	Other income (expense), net	Other income (expense), net	Other income (expense), net
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	$ (1.3)	$ 11.9	$ (4)	$ 17.9
Currency Swap [Member] | Nonoperating Income (Expense) [Member] | Cash Flow Hedging [Member] | Forecast [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedge gain (loss) to be reclassified within twelve months					0.3
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Income Statement Location Gain (Loss) Reclassified from Accumulated OCI	Interest expense	Interest expense	Interest expense	Interest expense
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	$ 0.2	$ (0.5)	$ 0.8	$ (3.4)
Interest Rate Swap [Member] | Interest Expense [Member] | Cash Flow Hedging [Member] | Forecast [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedge gain (loss) to be reclassified within twelve months					$ 4.5

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ / shares in Units, $ in Millions	Jun. 30, 2023	Dec. 31, 2022
REE Automotive Ltd.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	$ 1.9
Share Price	$ 0.38
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	$ 324.1	$ 363.6
Other Noncurrent Assets [Member] | Fair Value, Inputs, Level 1 [Member] | REE Automotive Ltd. | Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	1.9	1.9
Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member] | Prepaid expenses and other [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contracts, Asset, Carrying and Fair Value Disclosure	17.3	8.2
Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contracts, Asset, Carrying and Fair Value Disclosure	7.6	3
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Prepaid expenses and other [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contracts, Asset, Carrying and Fair Value Disclosure	1.4	0.5
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Prepaid expenses and other [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Assets, at Carrying and Fair Value	4.5	2.4
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivative Assets, at Carrying and Fair Value	15.1	8.5
Currency Swap [Member] | Designated as Hedging Instrument [Member] | Accrued expenses and other [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contracts, Liability, Carrying and Fair Value Disclosure	6.5	0
Currency Swap [Member] | Designated as Hedging Instrument [Member] | Postretirement benefits and other long-term liabilities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contracts, Liability, Carrying and Fair Value Disclosure	$ 0	$ 1.5

Fair Value of Debt (Details)

Fair Value of Debt (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Multi Currency Credit Facility Member | Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Line of Credit	$ 0	$ 25
Multi Currency Credit Facility Member | Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Line of Credit	0	25
Term Loan A [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Secured Debt	500.5	520
Term Loan A [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Secured Debt	500.5	520
Term Loan A [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Secured Debt	489.9	510.3
Term Loan B [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Secured Debt	664.9	675
Term Loan B [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Secured Debt	664.9	675
Term Loan B [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Secured Debt	662.4	658.1
6.875% Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unsecured Debt	400	400
6.875% Notes [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unsecured Debt	400	400
6.875% Notes [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unsecured Debt	370	355.4
6.50% Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unsecured Debt	500	500
6.50% Notes [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unsecured Debt	500	500
6.50% Notes [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unsecured Debt	471.3	452.5
6.25% Notes Due 2026 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unsecured Debt	180	180
6.25% Notes Due 2026 [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unsecured Debt	180	180
6.25% Notes Due 2026 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unsecured Debt	174.2	165.7
5.00% Notes due 2029 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unsecured Debt	600	600
5.00% Notes due 2029 [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unsecured Debt	600	600
5.00% Notes due 2029 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unsecured Debt	$ 499.5	$ 474.9

Schedule of Employee Benefit Pl

Schedule of Employee Benefit Plans Components of Net Periodic Benefit Cost (Credit) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.2	$ 0.4	$ 0.5	$ 0.9
Interest cost	6.1	4.2	12.1	8.4
Expected asset return	(7.3)	(7.8)	(14.5)	(15.8)
Amortized loss (gain)	1.1	1.9	2.1	3.8
Net periodic benefit cost (credit)	0.1	(1.3)	0.2	(2.7)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.1	0	0.1	0.1
Interest cost	2.5	2.1	5	4.2
Amortized loss (gain)	(2.1)	0.1	(4.2)	0.2
Amortized prior service credit	(0.1)	(0.2)	(0.2)	(0.4)
Net periodic benefit cost	$ 0.4	$ 2	$ 0.7	$ 4.1

Employee Benefit Plans and Othe

Employee Benefit Plans and Other Postretirement Benefit Plans Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Liability, Defined Benefit Pension Plan, Noncurrent	$ 69.6	$ 73.5
Liability, Other Postretirement Defined Benefit Plan, Noncurrent	302	$ 304.8
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	1
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	$ 14.6

Product Warranties (Details)

Product Warranties (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Product Warranty Rollforward
Beginning balance	$ 61.4	$ 60.4	$ 54.1	$ 59.5
Accruals	3.6	3.9	12.3	7.9
Payments	(2.5)	(1)	(4.3)	(4.1)
Adjustment to prior period accruals	(0.4)	(0.6)	(0.4)	(0.6)
Foreign currency translation	(0.4)	(0.8)	0	(0.8)
Ending balance	$ 61.7	$ 61.9	$ 61.7	$ 61.9

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended		7 Months Ended
	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Income tax expense		$ 5.3	$ 0.6	$ 5.3	$ 3.6
Effective income tax rate, continuing operations		39.80%	2.60%	64.60%	13.10%
Other Tax Expense (Benefit)		$ (3.2)		$ 3.4
Gain on bargain purchase of business		0	$ 11.6	0	$ 11.6
Assessed tax liability and interest, Notice of tax due		10.1		10.1
Unrecognized tax benefit liability, including penalties and accrued interest		$ 29.6		29.6		$ 40.5
Tekfor Group
Gain on bargain purchase of business	$ 11.6		$ 11.6		$ 11.6	$ 13.6
Minimum [Member]
Income Tax Examination, Estimate of Possible Loss				285
Maximum [Member]
Income Tax Examination, Estimate of Possible Loss				$ 335

Earnings (Loss) Per Share (Deta

Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator
Net income	$ 8	$ 22.9	$ 2.9	$ 23.9
Less: Net income attributable to participating securities	(0.1)	(1)	(0.1)	(1)
Net income attributable to common shareholders - Basic and Dilutive	$ 7.9	$ 21.9	$ 2.8	$ 22.9
Denominators
Basic - Weighted-average shares outstanding	120.4	119.5	120.1	119.2
Basic - Less: Weighted-average participating securities	(3.4)	(5)	(4)	(4.8)
Basic - Weighted-average common shares outstanding	117	114.5	116.1	114.4
Effect of dilutive securities - dilutive stock-based compensation	0.2	0.8	0.2	0.6
Diluted - Adjusted weighted-average shares after assumed conversions	117.2	115.3	116.3	115
Basic EPS	$ 0.07	$ 0.19	$ 0.02	$ 0.20
Diluted EPS	$ 0.07	$ 0.19	$ 0.02	$ 0.20

Reclassifications out of Accu_3

Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended						6 Months Ended
		Jun. 30, 2023		Mar. 31, 2023	Jun. 30, 2022		Mar. 31, 2022	Jun. 30, 2023		Jun. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Defined benefit plans, net current period other comprehensive income (loss)	[1]	$ (0.7)			$ 1.3			$ (1.4)		$ 2.6
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		(4.7)			(42.3)			4.1		(36.3)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	[2]	17.3			(1.7)			19.8		14
Other comprehensive income (loss)		11.9			(42.7)			22.5		(19.7)
Cost of Sales [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax		(5.5)			(1.9)			(8.8)		(3.1)
Interest Expense [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax		(0.2)			0.5			(0.8)		3.4
Other Income [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax		1.3			(11.9)			4		(17.9)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), net of tax - Beginning balance		(147.6)		$ (146.9)	(240.6)		$ (241.9)	(146.9)		(241.9)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax		0			0			0		0
Income tax effect of other comprehensive income (loss) before reclassifications		0			0			0		0
Defined benefit plans, amounts reclassified from accumulated other comprehensive income (loss)		(1.1)	[3]		1.8	[3]		(2.3)	[4]	3.6	[4]
Income taxes reclassified into net income		0.4			(0.5)			0.9		(1)
Defined benefit plans, net current period other comprehensive income (loss)		(0.7)			1.3			(1.4)		2.6
Accumulated other comprehensive income (loss), net of tax - Ending balance		(148.3)		(147.6)	(239.3)		(240.6)	(148.3)		(239.3)
Accumulated Foreign Currency Adjustment Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), net of tax - Beginning balance		(140.9)		(149.7)	(105.3)		(111.3)	(149.7)		(111.3)
Foreign currency translation adjustments, other comprehensive income (loss) arising during period		(4.7)			(42.3)			4.1		(36.3)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax		0			0			0		0
Foreign currency translation adjustments, amounts reclassified from accumulated other comprehensive income (loss)		0			0			0		0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Tax		0			0			0		0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		(4.7)			(42.3)			4.1		(36.3)
Accumulated other comprehensive income (loss), net of tax - Ending balance		(145.6)		(140.9)	(147.6)		(105.3)	(145.6)		(147.6)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), net of tax - Beginning balance		23.7		21.2	4.1		(11.6)	21.2		(11.6)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax		25.2			11.4			27.1		34.3
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax		(3.2)			(2.2)			(1)		(5.7)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		(4.4)	[5]		(13.3)	[5]		(5.6)	[6]	(17.6)	[6]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax		(0.3)			2.4			(0.7)		3
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		17.3			(1.7)			19.8		14
Accumulated other comprehensive income (loss), net of tax - Ending balance		41		23.7	2.4		4.1	41		2.4
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), net of tax - Beginning balance		(264.8)		(275.4)	(341.8)		(364.8)	(275.4)		(364.8)
Other comprehensive income (loss) arising during period, total		20.5			(30.9)			31.2		(2)
Other Comprehensive Income (Loss) before Reclassifications, Tax		(3.2)			(2.2)			(1)		(5.7)
Other comprehensive income (loss), reclassification before tax		(5.5)			(11.5)			(7.9)		(14)
Reclassification from AOCI, Current Period, Tax		0.1			1.9			0.2		2
Defined benefit plans, net current period other comprehensive income (loss)		(0.7)		(0.7)	1.3		1.3
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		(4.7)		8.8	(42.3)		6
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		17.3		2.5	(1.7)		15.7
Other comprehensive income (loss)		11.9			(42.7)			22.5		(19.7)
Accumulated other comprehensive income (loss), net of tax - Ending balance		$ (252.9)		$ (264.8)	$ (384.5)		$ (341.8)	$ (252.9)		$ (384.5)
[1]Amounts are net of tax of $0.4 million and $0.9 million for the three and six months ended June 30, 2023 and $(0.5) million and $(1.0) million for the three and six months ended June 30, 2022.[2]Amounts are net of tax of $(3.5) million and $(1.7) million for the three and six months ended June 30, 2023 and $0.2 million and $(2.7) million for the three and six months ended June 30, 2022.[3]These amounts were reclassified from AOCI to Other income (expense), net for the three months ended June 30, 2023 and June 30, 2022.[4]These amounts were reclassified from AOCI to Other income (expense), net for the six months ended June 30, 2023 and June 30, 2022.[5]The amounts reclassified from AOCI included $(5.5) million in cost of goods sold (COGS), $(0.2) million in interest expense and $1.3 million in Other income (expense), net for the three months ended June 30, 2023 and $(1.9) million in COGS, $0.5 million in interest expense and $(11.9) million in Other income (expense), net for the three months ended June 30, 2022.[6]The amounts reclassified from AOCI included $(8.8) million in cost of goods sold (COGS), $(0.8) million in interest expense and $4.0 million in Other income (expense), net for the six months ended June 30, 2023 and $(3.1) million in COGS, $3.4 million in interest expense and $(17.9) million in Other income (expense), net for the six months ended June 30, 2022.

Revenue from Contracts with C_2

Revenue from Contracts with Customers Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 1,570.7	$ 1,438.3	$ 3,064.6	$ 2,874.5
North America [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,159.7	1,128	2,271.2	2,255.2
Asia [Member]
Disaggregation of Revenue [Line Items]
Net sales	129	101.5	241.5	229
Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	230.6	178.5	453.3	343.5
South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	51.4	30.3	98.6	46.8
Driveline [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,086.4	1,024.7	2,100.2	2,070.1
Driveline [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Net sales	827.1	808.9	1,610.1	1,617.5
Driveline [Member] | Asia [Member]
Disaggregation of Revenue [Line Items]
Net sales	118.5	93.1	224.3	210.1
Driveline [Member] | Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	111.4	100.6	211.2	206.4
Driveline [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	29.4	22.1	54.6	36.1
Metal Forming [Member]
Disaggregation of Revenue [Line Items]
Net sales	484.3	413.6	964.4	804.4
Metal Forming [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Net sales	332.6	319.1	661.1	637.7
Metal Forming [Member] | Asia [Member]
Disaggregation of Revenue [Line Items]
Net sales	10.5	8.4	17.2	18.9
Metal Forming [Member] | Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	119.2	77.9	242.1	137.1
Metal Forming [Member] | South America [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 22	$ 8.2	$ 44	$ 10.7

Revenue from Contracts with C_3

Revenue from Contracts with Customers Contract Assets and Liabilities (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Accounts receivable, net	$ 921.1		$ 820.2
Deferred revenue, current	15.9		28.1
Deferred revenue, noncurrent	69.3		$ 73.4
Increase (decrease) in accounts receivable	100.9
Contract liability, current, increase (decrease)	(12.2)
Contract liability, noncurrent, increase (decrease)	(4.1)
Contract with customer, liability, revenue recognized	$ 21.5	$ 15.6

Acquisitions - Tekfor (Details)

Acquisitions - Tekfor (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended		6 Months Ended		7 Months Ended
	Jun. 01, 2022	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Business Acquisition [Line Items]
Gain on bargain purchase of business			$ 0	$ 11.6	$ 0	$ 11.6
Fair Value Inventory Adjustment for Tekfor Aquisition			$ 0	5	0	5
Tekfor Group
Business Acquisition [Line Items]
Business Acquisition, Name of Acquired Entity	Tekfor Group
Business Combination, Consideration Transferred	$ 94.4
Business Acquisition, Description of Acquired Entity	Tekfor Group manufactures high-performance components, modules and fasteners, including traditional powertrain and driveline components (for both internal combustion and hybrid applications), and e-mobility components. Our acquisition of Tekfor contributes to diversifying our geographic and customer sales mix, while also increasing our electrification product portfolio.
Cash and cash equivalents	$ 14.3
Accounts receivable	33.7
Inventories	46.3
Prepaid expenses and other long-term assets	30.1
Deferred income tax assets	5
Property, plant and equipment	105.5
Total assets acquired	234.9
Accounts payable	33.5
Accrued expenses and other	28.1
Debt	23.4
Postretirement benefits and other long-term liabilities	41.9
Net assets acquired	$ 108
Gain on bargain purchase of business		$ 11.6		$ 11.6		$ 11.6	$ 13.6
Business Combination, Bargain Purchase, Gain Recognized, Description	The gain on bargain purchase of business was primarily the result of macroeconomic factors such as the supply chain disruptions impacting the automotive industry, including the conflict between Russia and Ukraine, the semiconductor supply shortage, and increasing input costs, including materials, freight and utilities.
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual		29			199
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual		7			$ (8)
Fair Value Inventory Adjustment for Tekfor Aquisition		$ 5

Acquisitions - Pro Forma (Detai

Acquisitions - Pro Forma (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended		7 Months Ended
	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Acquisition related costs				$ 0	$ 5.7
Gain on bargain purchase of business		$ 0	$ 11.6	$ 0	11.6
Tekfor Group
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Acquisition, Pro Forma Revenue					3,000
Business Acquisition, Pro Forma Net Income (Loss)					$ 20
Business Acquisition, Pro Forma Earnings Per Share, Diluted					$ 0.17
Fair Value Inventory Adjustment from Acquisition of Tekfor, net of tax					$ 4
Acquisition related costs					5
Gain on bargain purchase of business	$ 11.6		$ 11.6		11.6	$ 13.6
Net adjustments reclassified in Pro Forma Net Income					$ 3

Manufacturing Facility Fire a_2

Manufacturing Facility Fire and Insurance Recovery (Details) - USD ($) $ in Millions	6 Months Ended		33 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023
Insurance Recoveries [Abstract]
Proceeds from Insurance Settlement, Operating and Investing Activities	$ 24	$ 11.7
Proceeds from Insurance Settlement, Operating Activities	7	7.1
Proceeds from Insurance Settlement, Investing Activities	$ 17	4.6
Insurance Deductible Expense			$ 1
Business interruption charges		1.4
Insurance Recoveries Estimated		6.8
Gain (Loss) Related to Insurance Settlement		$ 5.4

Sales and Segment Adjusted EBIT

Sales and Segment Adjusted EBITDA (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Sales	$ 1,720.7	$ 1,582.4	$ 3,353.6	$ 3,152.9
Less: intersegment sales	150	144.1	289	278.4
Net external sales	1,570.7	1,438.3	3,064.6	2,874.5
Segment Adjusted EBITDA	191.6	195.1	367	391.2
Driveline [Member]
Segment Reporting Information [Line Items]
Sales	1,086.5	1,024.7	2,100.3	2,070.1
Less: intersegment sales	0.1	0	0.1	0
Net external sales	1,086.4	1,024.7	2,100.2	2,070.1
Segment Adjusted EBITDA	152.1	132.4	266.2	255.2
Metal Forming [Member]
Segment Reporting Information [Line Items]
Sales	634.2	557.7	1,253.3	1,082.8
Less: intersegment sales	149.9	144.1	288.9	278.4
Net external sales	484.3	413.6	964.4	804.4
Segment Adjusted EBITDA	$ 39.5	$ 62.7	$ 100.8	$ 136

Reconciliation of Total Segment

Reconciliation of Total Segment Adjusted EBITDA to Income Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Total segment adjusted EBITDA	$ 191.6	$ 195.1	$ 367	$ 391.2
Interest expense	(50.2)	(42.7)	(100.7)	(87.4)
Depreciation and amortization	(120.5)	(121.9)	(245.4)	(242.3)
Restructuring and acquisition-related costs	(7.9)	(9.6)	(12.7)	(18.5)
Unrealized gain (loss) on equity securities	0.3	(3.7)	0	(21.7)
Debt refinancing and redemption costs	0	(0.2)	0	(5.8)
Malvern Fire insurance recoveries, net	0	(0.1)	0	5.4
Acquisition-related fair value inventory adjustment	0	(5)	0	(5)
Gain on bargain purchase of business	0	11.6	0	11.6
Income before income taxes	$ 13.3	$ 23.5	$ 8.2	$ 27.5