10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C.  20549

FORM 10-Q

R	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended March 31, 2013
or
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from  _____________ to _____________

Commission File Number:  1-14303

_______________________________________________________________________________

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

(Exact Name of Registrant as Specified in Its Charter)

Delaware	38-3161171
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)
One Dauch Drive, Detroit, Michigan	48211-1198
(Address of Principal Executive Offices)	(Zip Code)

(313) 758-2000

(Registrant's Telephone Number, Including Area Code)

_______________________________________________________________________________

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

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).     Yes R No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.  See definition of “accelerated filer,” “large accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer  R          Accelerated filer  o            Non-accelerated filer   o                Smaller reporting company   o

                                                                                (Do not check if a smaller reporting company)

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

As of May 1, 2013, the latest practicable date, the number of shares of the registrant's Common Stock, par value $0.01 per share, outstanding was 74,839,567 shares.

Internet Website Access to Reports

The website for American Axle & Manufacturing Holdings, Inc. is www.aam.com.  Our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13 or 15(d) of the Exchange Act are available free of charge through our website as soon as reasonably practicable after they are electronically filed with, or furnished to, the Securities and Exchange Commission (SEC).  The SEC also maintains a website at www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

FORM 10-Q

FOR THE QUARTER ENDED MARCH 31, 2013

TABLE OF CONTENTS

			Page Number
FORWARD-LOOKING STATEMENTS			1
Part I		FINANCIAL INFORMATION	2
	Item 1	Financial Statements	2
		Condensed Consolidated Statements of Income	2
		Condensed Consolidated Statements of Comprehensive Income	3
		Condensed Consolidated Balance Sheets	4
		Condensed Consolidated Statements of Cash Flows	5
		Notes to Condensed Consolidated Financial Statements	6
	Item 2	Management's Discussion and Analysis of Financial Condition and Results of Operations	19
	Item 3	Quantitative and Qualitative Disclosures About Market Risk	23
	Item 4	Controls and Procedures	23
Part II		OTHER INFORMATION	24
	Item 1A	Risk Factors	24
	Item 6	Exhibits	24
		Signatures	25
		Exhibit Index	26
		Ex. 31.1  Certification - CEO - Rule 13a-14(a)
		Ex. 31.2  Certification - CFO - Rule 13a-14(a)
		Ex. 32  Section 906 Certifications
		Ex. 101 Instance Document
		Ex. 101 Schema Document
		Ex. 101 Calculation Linkbase Document
		Ex. 101 Label Linkbase Document
		Ex. 101 Presentation Linkbase Document
		Ex. 101 Definition Linkbase Document

FORWARD-LOOKING STATEMENTS

In this Quarterly Report on Form 10-Q (Quarterly Report), we make statements concerning our expectations, beliefs, plans, objectives, goals, strategies, and future events or performance.  Such statements are “forward-looking” statements within the meaning of the Private Securities Litigation Reform Act of 1995 and relate to trends and events that may affect our future financial position and operating results.  The terms such as “will,” “may,” “could,” “would,” “plan,” “believe,” “expect,” “anticipate,” “intend,” “project,” and similar words or expressions, as well as statements in future tense, are intended to identify forward-looking statements.

Forward-looking statements should not be read as a guarantee of future performance or results, and will not necessarily be accurate indications of the times at, or by, which such performance or results will be achieved.  Forward-looking statements are based on information available at the time those statements are made and/or management’s good faith belief as of that time with respect to future events and are subject to risks and may differ materially from those expressed in or suggested by the forward-looking statements.  Important factors that could cause such differences include, but are not limited to:

• global economic conditions, including the impact of the debt crisis in the Euro-zone; 

• reduced purchases of our products by General Motors Company (GM), Chrysler Group LLC (Chrysler) or other customers;

• reduced demand for our customers' products (particularly light trucks and sport utility vehicles (SUVs) produced by GM and Chrysler);

• our ability or our customers' and suppliers' ability to successfully launch new product programs on a timely basis;

• our ability to realize the expected revenues from our new and incremental business backlog;

• our ability to respond to changes in technology, increased competition or pricing pressures;

• supply shortages or price increases in raw materials, utilities or other operating supplies for us or our customers as a result of natural disasters or otherwise;

• liabilities arising from warranty claims, product recall or field actions, product liability and legal proceedings to which we are or may become a party;

• our ability to achieve the level of cost reductions required to sustain global cost competitiveness;

• our ability to attract new customers and programs for new products;

• price volatility in, or reduced availability of, fuel;

• our ability to develop and produce new products that reflect market demand;

• lower-than-anticipated market acceptance of new or existing products;

• our ability to maintain satisfactory labor relations and avoid work stoppages;

• our suppliers', our customers' and their suppliers' ability to maintain satisfactory labor relations and avoid work stoppages;

• risks inherent in our international operations (including adverse changes in political stability, taxes and other law changes, potential disruptions of production and supply, and currency rate fluctuations);

• availability of financing for working capital, capital expenditures, research and development (R&D) or other general corporate purposes, including our ability to comply with financial covenants;

• our customers' and suppliers' availability of financing for working capital, capital expenditures, R&D or other general corporate purposes;

• adverse changes in laws, government regulations or market conditions affecting our products or our customers' products (such as the Corporate Average Fuel Economy (CAFE) regulations);

• changes in liabilities arising from pension and other postretirement benefit obligations;

• our ability to attract and retain key associates;

• risks of noncompliance with environmental laws and regulations or risks of environmental issues that could result in unforeseen costs at our facilities;

• our ability or our customers' and suppliers' ability to comply with the Dodd-Frank Act and other regulatory requirements and the potential costs of such compliance;

• our ability to consummate and integrate acquisitions and joint ventures; and

• other unanticipated events and conditions that may hinder our ability to compete.

It is not possible to foresee or identify all such factors and we make no commitment to update any forward-looking statement or to disclose any facts, events or circumstances after the date hereof that may affect the accuracy of any forward-looking statement.

1

PART I.  FINANCIAL INFORMATION

Item 1.  Financial Statements

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

	Three Months Ended
	March 31,
	2013			2012
	(in millions, except per share data)
Net sales	$	755.6		$	751.5
Cost of goods sold	651.3			612.3
Gross profit	104.3			139.2
Selling, general and administrative expenses	59.6			61.8
Operating income	44.7			77.4
Interest expense	(29.1		)	(24.0		)
Investment income	0.1			0.3
Other income (expense)
Debt refinancing and redemption costs	(11.3		)	—
Other, net	0.5			(1.2		)
Income before income taxes	4.9			52.5
Income tax expense (benefit)	(2.4		)	2.2
Net income	7.3			50.3
Net loss attributable to noncontrolling interests	—			0.9
Net income attributable to AAM	$	7.3		$	51.2
Basic earnings per share	$	0.10		$	0.68
Diluted earnings per share	$	0.10		$	0.68

See accompanying notes to condensed consolidated financial statements.                   

2

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Three Months Ended
	March 31,
	2013			2012
	(in millions)
Net income	$	7.3		$	50.3
Other comprehensive income (loss), net of tax
Defined benefit plans, net of $0.7 million of tax in 2013	(1.1		)	(14.0		)
Foreign currency translation adjustments	4.9			10.7
Change in derivatives	0.5			5.6
Other comprehensive income	4.3			2.3
Comprehensive income	11.6			52.6
Net loss attributable to noncontrolling interests	—			0.9
Foreign currency translation adjustments attributable to noncontrolling interests	—			0.2
Comprehensive income attributable to AAM	$	11.6		$	53.3

See accompanying notes to condensed consolidated financial statements.                   

3

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

	March 31, 2013			December 31, 2012
	(Unaudited)
Assets	(in millions)
Current assets
Cash and cash equivalents	$	100.8		$	62.4
Accounts receivable, net	535.3			463.4
Inventories, net	240.6			224.3
Prepaid expenses and other current assets	128.4			122.0
Total current assets	1,005.1			872.1
Property, plant and equipment, net	1,043.5			1,009.7
Deferred income taxes	365.6			366.1
Goodwill	156.4			156.4
GM postretirement cost sharing asset	253.8			259.7
Other assets and deferred charges	205.2			202.0
Total assets	$	3,029.6		$	2,866.0
Liabilities and Stockholders’ Deficit
Current liabilities
Accounts payable	$	454.6		$	396.1
Accrued compensation and benefits	83.9			84.9
Deferred revenue	16.0			17.2
Accrued expenses and other current liabilities	96.6			102.6
Total current liabilities	651.1			600.8
Long-term debt	1,570.2			1,454.1
Deferred revenue	78.4			82.2
Postretirement benefits and other long-term liabilities	837.8			849.7
Total liabilities	3,137.5			2,986.8
Stockholders' deficit
Common stock, par value $0.01 per share	0.8			0.8
Paid-in capital	602.2			600.9
Accumulated deficit	(268.5		)	(275.8		)
Treasury stock at cost, 6.0 million shares as of March 31, 2013 and
December 31, 2012	(182.1		)	(182.1		)
Accumulated other comprehensive income (loss), net of tax
Defined benefit plans	(275.6		)	(274.5		)
Foreign currency translation adjustments	12.5			7.6
Unrecognized gain on derivatives	2.8			2.3
Total AAM stockholders' deficit	(107.9		)	(120.8		)
Noncontrolling interest in subsidiaries	—			—
Total stockholders’ deficit	(107.9		)	(120.8		)
Total liabilities and stockholders' deficit	$	3,029.6		$	2,866.0

See accompanying notes to condensed consolidated financial statements. 

4

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Three Months Ended
	March 31,
	2013			2012
	(in millions)
Operating activities
Net income	$	7.3		$	50.3
Adjustments to reconcile net income to net cash used in operating activities
Depreciation and amortization	41.3			36.7
Deferred income taxes	(2.6		)	(0.5		)
Stock-based compensation	1.3			0.4
Pensions and other postretirement benefits, net of contributions	1.0			(16.7		)
Loss on disposal of property, plant and equipment, net	0.2			0.6
Debt refinancing and redemption costs	2.6			—
Changes in operating assets and liabilities
Accounts receivable	(70.7		)	(166.3		)
Inventories	(15.5		)	(24.7		)
Accounts payable and accrued expenses	29.0			73.0
Deferred revenue	(5.0		)	(13.3		)
Other assets and liabilities	(15.7		)	(11.0		)
Net cash used in operating activities	(26.8		)	(71.5		)
Investing activities
Purchases of property, plant and equipment	(47.9		)	(44.5		)
Proceeds from sale of property, plant and equipment	0.1			0.9
Proceeds from sale-leaseback of equipment	3.9			—
Net cash used in investing activities	(43.9		)	(43.6		)
Financing activities
Net short-term borrowings under credit facilities	11.3			59.1
Payments of long-term debt and capital lease obligations	(301.8		)	(2.4		)
Proceeds from issuance of long-term debt	405.2			10.1
Debt issuance costs	(6.2		)	—
Purchase of noncontrolling interest	—			(4.0		)
Purchase of treasury stock	—			(5.9		)
Employee stock option exercises	—			0.1
Net cash provided by financing activities	108.5			57.0
Effect of exchange rate changes on cash	0.6			1.7
Net increase (decrease) in cash and cash equivalents	38.4			(56.4		)
Cash and cash equivalents at beginning of period	62.4			169.2
Cash and cash equivalents at end of period	$	100.8		$	112.8
Supplemental cash flow information
Interest paid	$	27.2		$	35.3
Income taxes paid, net of refunds	$	2.1		$	5.2

See accompanying notes to condensed consolidated financial statements.

5

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2013

(Unaudited)

1. ORGANIZATION AND BASIS OF PRESENTATION

Organization American Axle & Manufacturing Holdings, Inc. (Holdings) and its subsidiaries (collectively, we, our, us or AAM) is a Tier I supplier to the automotive industry. We manufacture, engineer, design and validate driveline and drivetrain systems and related components and chassis modules for light trucks, sport utility vehicles (SUVs), passenger cars, crossover vehicles and commercial vehicles. Driveline and drivetrain systems include components that transfer power from the transmission and deliver it to the drive wheels. Our driveline, drivetrain and related products include axles, chassis modules, driveshafts, power transfer units, transfer cases, chassis and steering components, driveheads, transmission parts and metal-formed products. In addition to locations in the United States (U.S.) (Michigan, Ohio, Indiana and Pennsylvania), we also have offices or facilities in Brazil, China, Germany, India, Japan, Luxembourg, Mexico, Poland, Scotland, South Korea, Sweden and Thailand.

Basis of PresentationWe 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, 2012 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.  Actual results could differ from those estimates.

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, 2012.

Effect of New Accounting Standards On January 1, 2013, new accounting guidance regarding impairment testing of indefinite-lived intangible assets became effective. Under the new guidance, an entity testing an indefinite-lived intangible asset for impairment has the option of performing a qualitative impairment assessment before calculating the fair value of the asset. We do not believe that the adoption of this new accounting guidance will have a significant effect on our impairment assessments of indefinite-lived intangible assets in the future.

On February 5, 2013, new accounting guidance was issued which requires entities to disclose additional information about items reclassified out of accumulated other comprehensive income (AOCI). The new guidance requires entities to disclose, either on the face of the financial statements or as a separate footnote to the financial statements, additional information regarding changes in AOCI balances by component, either before tax or net-of-tax, and requires entities to disclose significant items reclassified out of AOCI by component. The new guidance does not change the current accounting guidance which states that a total for comprehensive income must be reported in condensed interim financial statements in either a single continuous statement or two separate but consecutive statements. Other than additional disclosure requirements, the adoption of this new guidance has had no impact on our condensed consolidated financial statements.

6

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

2. RESTRUCTURING ACTIONS

There were no payments made in the first quarter of 2013 related to our remaining asset retirement obligation of $0.5 million, as of March 31, 2013.

In the first quarter of 2012, we incurred charges related to the redeployment of assets and other related costs associated with the closure of our Detroit Manufacturing Complex (DMC) and Cheektowaga Manufacturing Facility (CKMF). We expensed and paid $12.2 million in the first quarter of 2012, related to these actions.

3. INVENTORIES

We state our inventories at the lower of cost or market.  The cost of our inventories is determined using the FIFO 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: 

	March 31, 2013			December 31, 2012
	(in millions)
Raw materials and work-in-progress	$	241.0		$	220.3
Finished goods	27.9			25.0
Gross inventories	268.9			245.3
Inventory valuation reserves	(28.3		)	(21.0		)
Inventories, net	$	240.6		$	224.3

4. LONG-TERM DEBT

Long-term debt consists of the following:

	March 31, 2013		December 31, 2012
	(in millions)
Revolving credit facility	$	—	$	—
9.25% Notes, net of discount	337.6		337.5
7.875% Notes	—		300.0
7.75% Notes	200.0		200.0
6.625% Notes	550.0		550.0
6.25% Notes	400.0		—
Foreign credit facilities	77.0		61.0
Capital lease obligations	5.6		5.6
Long-term debt	$	1,570.2	$	1,454.1

6.25% Notes In the first quarter of 2013, we issued $400.0 million of 6.25% senior unsecured notes due 2021 (6.25% Notes). Concurrent with the offering of the 6.25% Notes, we made a tender offer to purchase our 7.875% Notes, of which the aggregate principal amount outstanding at the time of the tender offer was $300.0 million. Net proceeds from the 6.25% Notes were used to fund the purchase pursuant to the tender offer and the subsequent redemption of the entire $300.0 million of the 7.875% Notes and for other general corporate purposes. We paid debt issuance costs of $6.2 million in the first quarter of 2013 related to the 6.25% Notes.

7

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

7.875% Notes On March 1, 2013, in connection with the cash tender offer, we purchased $172.6 million aggregate principal amount of the 7.875% Notes, and paid accrued interest. Upon purchase, we expensed $5.2 million related to a tender premium, $0.2 million of professional fees and unamortized debt issuance costs of $1.2 million related to this debt. We had been amortizing the debt issuance costs over the expected life of the borrowing.

On March 15, 2013, we voluntarily redeemed the remaining 7.875% Notes outstanding. This resulted in a principal payment of $127.4 million, a payment of $3.3 million related to a redemption premium, as well as payment of accrued interest. Upon redemption, we expensed $0.9 million of unamortized debt issuance costs related to this debt. We had been amortizing the debt issuance costs over the expected life of the borrowing.

Revolving Credit Facility On March 20, 2013, we terminated our class C loan facility of $72.8 million, which would have matured on June 30, 2013. Upon termination, we expensed $0.5 million of unamortized debt issuance costs related to the class C facility. We had been amortizing the debt issuance costs over the expected life of the borrowing. As of March 31, 2013, the Revolving Credit Facility provided up to $365.0 million of revolving bank financing commitments through June 30, 2016.  At March 31, 2013, we had $342.1 million available under the Revolving Credit Facility.  This availability reflects a reduction of $22.9 million for standby letters of credit issued against the facility.

The Revolving Credit Facility provides back-up liquidity for our foreign credit facilities.  We intend to use the availability of long-term financing under the Revolving Credit Facility to refinance any current maturities related to such debt agreements that are not otherwise refinanced on a long-term basis in their local markets.

We utilize local currency credit facilities to finance the operations of certain foreign subsidiaries.  At March 31, 2013, $77.0 million was outstanding under these facilities and an additional $13.6 million was available.

The weighted-average interest rate of our long-term debt outstanding was 7.5% at March 31, 2013 and 7.9% at December 31, 2012.  

5. FAIR VALUE

The fair value accounting guidance 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 fair values of our financial assets and liabilities that are recognized at fair value on a recurring basis, using available market information and other observable data, as of March 31, 2013, are as follows:

	March 31, 2013				December 31, 2012
	Carrying Amount		Fair Value		Carrying Amount		Fair Value		Input
	(in millions)				(in millions)
Balance Sheet Classification
Cash equivalents	$	4.9	$	4.9	$	6.5	$	6.5	Level 1
Prepaid expenses and other current     assets
Currency forward contracts	2.8		2.8		2.3		2.3		Level 2

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AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

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 estimated the fair value of the amounts outstanding on our debt using available market information and other observable data, to be as follows:

	March 31, 2013				December 31, 2012
	Carrying  Amount		Fair Value		Carrying  Amount		Fair Value		Input
	(in millions)				(in millions)
Revolving Credit Facility	$	—	$	—	$	—	$	—	Level 2
9.25% Notes	337.6		373.2		337.5		377.4		Level 2
7.875% Notes	—		—		300.0		310.1		Level 2
7.75% Notes	200.0		219.7		200.0		216.5		Level 2
6.625% Notes	550.0		565.8		550.0		555.5		Level 2
6.25% Notes	400.0		408.5		—		—		Level 2

6. DERIVATIVES

Our business and financial results are affected by fluctuations in world 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 forward contracts  From time to time, we use foreign currency forward contracts to reduce the effects of fluctuations in exchange rates, primarily relating to the Mexican Peso, Euro and Pound Sterling.  As of March 31, 2013, we have currency forward contracts outstanding with a notional amount of $26.8 million that hedge our exposure to changes in foreign currency exchange rates for our payroll expenses.  

The following table summarizes the reclassification of pre-tax derivative gains into net income from accumulated other comprehensive income (loss):

	Location of	Gain (Loss) Reclassified During					Gain Expected to
	Gain (Loss)	Three Months Ended					be Reclassified
	Reclassified into	March 31,					During the
	Net Income	2013		2012			Next 12 Months
		(in millions)
Currency forward contracts	Cost of goods sold	$	1.2	$	(0.2	)	$	2.8

9

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

7. EMPLOYEE BENEFIT PLANS

The components of net periodic benefit cost (credit) are as follows:

	Pension Benefits
	Three Months Ended
	March 31,
	2013			2012
	(in millions)
Service cost	$	0.9		$	0.8
Interest cost	8.5			8.8
Expected asset return	(11.5		)	(8.0		)
Amortized loss	2.4			1.8
Amortized prior service cost	0.3			—
Net periodic benefit cost	$	0.6		$	3.4
	Other Postretirement Benefits
	Three Months Ended
	March 31,
	2013			2012
	(in millions)
Service cost	$	0.1		$	0.1
Interest cost	3.3			3.9
Amortized loss	0.2			0.2
Amortized prior service credit	(0.4		)	(0.5		)
Curtailment gain	—			(21.8		)
Net periodic benefit cost (credit)	$	3.2		$	(18.1	)

We recorded a gain of $21.8 million to cost of goods sold for the curtailment of certain other postretirement benefits (OPEB) in the three months ended March 31, 2012. This resulted primarily from the reduction in the expected future OPEB related to the DMC and CKMF hourly associates who terminated employment from AAM as a result of our plant closures. These curtailment gains resulted in an increase in our accumulated other comprehensive loss of $21.8 million.

Due to our significant pension contributions made in 2012, we will not make any cash payments in 2013 to satisfy our regulatory funding requirements. We expect our cash outlay for other postretirement benefit obligations in 2013, net of GM cost sharing, to be approximately $15 million.

10

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

8. PRODUCT WARRANTIES

We record a liability for estimated warranty obligations at the dates our product 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 adjust the liability as necessary.

The following table provides a reconciliation of changes in the product warranty liability:

	Three Months Ended
	March 31,
	2013			2012
	(in millions)
Beginning balance	$	29.1		$	13.4
Accruals	3.2			3.6
Settlements	(9.2		)	(0.2		)
Adjustment to prior period accruals	(0.2		)	(0.1		)
Foreign currency translation and other	—			0.1
Ending balance	$	22.9		$	16.8

9. INCOME TAXES

We are required to adjust our effective tax rate each quarter to estimate our annual effective tax rate. We must also record the tax impact of certain discrete, unusual or infrequently occurring items, including changes in judgment about valuation allowances and effects of changes in tax laws or rates, 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.

Income tax expense (benefit) was a benefit of $2.4 million in the first quarter of 2013 as compared to expense of $2.2 million in the first quarter of 2012.  Our effective income tax rate was negative 48.1% in the first quarter of 2013 as compared to 4.3% in the first quarter of 2012. Our income tax benefit and effective tax rate for the three months ended March 31, 2013 primarily reflect favorable foreign tax rates, along with our inability to realize a tax benefit for current foreign losses. Our income tax benefit and effective tax rate for the three months ended March 31, 2013 also reflect a tax benefit of $1.5 million relating to the release of a prior year unrecognized tax benefit due to the expiration of the applicable statute of limitations and a benefit of $3.3 million relating to an election we made in the first quarter of 2013 regarding the treatment of foreign exchange gains and losses in a foreign jurisdiction.

Our income tax expense and effective tax rate for the three months ended March 31, 2012 primarily reflected recognizing a net operating loss benefit against our taxable income in the U.S., as well as the effect of recognizing a tax benefit of $1.1 million relating to the release of a prior year unrecognized tax benefit for which the statute of limitations had expired and tax expense of $0.7 million relating to foreign withholding taxes paid for which a foreign tax credit could not be realized.

11

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

10. EARNINGS PER SHARE (EPS)

 The following table sets forth the computation of our basic and diluted EPS:

	Three Months Ended
	March 31,
	2013		2012
	(in millions, except per share data)
Numerator
Net income attributable to AAM	$	7.3	$	51.2
Denominator
Basic shares outstanding -
Weighted-average shares outstanding	76.2		75.0
Effect of dilutive securities
Dilutive stock-based compensation	—		—
Diluted shares outstanding -
Adjusted weighted-average shares after assumed conversions	76.2		75.0
Basic EPS	$	0.10	$	0.68
Diluted EPS	$	0.10	$	0.68

Certain exercisable stock options were excluded in the computations of diluted EPS because the exercise price of these options was greater than the average period market prices. The number of stock options outstanding, which were not included in the calculation of diluted EPS, was 2.3 million at March 31, 2013 and 3.3 million at March 31, 2012. The ranges of exercise prices related to the excluded exercisable stock options were $15.58 - $40.83 at March 31, 2013 and March 31, 2012.

11. RECLASSIFICATIONS OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

Reclassification adjustments and other activity impacting accumulated other comprehensive income (loss) during the three months ended March 31, 2013 are as follows (in millions):

	Defined Benefit Plans			Foreign Currency Translation Adjustments		Unrecognized Gain on Derivatives			Total
Balance at December 31, 2012	$	(274.5	)	$	7.6	$	2.3		$	(264.6	)
Other comprehensive income (loss) before reclassifications	(3.6		)	4.9		1.7			3.0
Amounts reclassified from accumulated other comprehensive income (loss) (Recorded in cost of goods sold)	2.5			—		(1.2		)	1.3
Net current period other comprehensive income (loss)	(1.1		)	4.9		0.5			4.3
Balance at March 31, 2013	$	(275.6	)	$	12.5	$	2.8		$	(260.3	)

12

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

12. SUPPLEMENTAL GUARANTOR CONDENSED CONSOLIDATING FINANCIAL STATEMENTS

Holdings has no significant assets other than its 100% ownership in AAM, Inc. and no direct subsidiaries other than AAM, Inc.  The 9.25% Notes are senior secured obligations of AAM Inc. and the 7.75% Notes, 6.625% Notes and 6.25% Notes are senior unsecured obligations of AAM Inc.; all of which are fully and unconditionally and joint and severally, guaranteed by Holdings and substantially all domestic subsidiaries of AAM, Inc.

These Condensed Consolidating Financial Statements are prepared under the equity method of accounting whereby the investments in subsidiaries are recorded at cost and adjusted for the parent’s share of the subsidiaries’ cumulative results of operations, capital contributions and distributions, and other equity changes.

Condensed Consolidating Statements of Income
Three Months Ended March 31,
(in millions)
	Holdings		AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Elims			Consolidated
2013
Net sales
External	$	—	$	200.3		$	53.9		$	501.4		$	—		$	755.6
Intercompany	—		3.4			57.6			4.9			(65.9		)	—
Total net sales	—		203.7			111.5			506.3			(65.9		)	755.6
Cost of goods sold	—		198.5			97.2			421.5			(65.9		)	651.3
Gross profit	—		5.2			14.3			84.8			—			104.3
Selling, general and administrative expenses	—		48.9			—			10.7			—			59.6
Operating income (loss)	—		(43.7		)	14.3			74.1			—			44.7
Non-operating income (expense), net	—		(41.5		)	2.7			(1.0		)	—			(39.8		)
Income (loss) before income taxes	—		(85.2		)	17.0			73.1			—			4.9
Income tax benefit	—		(1.6		)	—			(0.8		)	—			(2.4		)
Earnings (loss) from equity in subsidiaries	7.3		40.4			(3.2		)	—			(44.5		)	—
Net income (loss) before royalties and dividends	7.3		(43.2		)	13.8			73.9			(44.5		)	7.3
Royalties and dividends	—		50.5			—			(50.5		)	—			—
Net income after royalties and dividends	7.3		7.3			13.8			23.4			(44.5		)	7.3
Net loss attributable to noncontrolling interests	—		—			—			—			—			—
Net income attributable to AAM	$	7.3	$	7.3		$	13.8		$	23.4		$	(44.5	)	$	7.3
Other comprehensive income	4.3		4.3			7.7			8.3			(20.3		)	4.3
Comprehensive income attributable to AAM	$	11.6	$	11.6		$	21.5		$	31.7		$	(64.8	)	$	11.6

13

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

	Holdings		AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Elims			Consolidated
2012
Net sales
External	$	—	$	198.3		$	54.5		$	498.7		$	—		$	751.5
Intercompany	—		7.6			60.7			5.8			(74.1		)	—
Total net sales	—		205.9			115.2			504.5			(74.1		)	751.5
Cost of goods sold	—		174.0			99.9			412.5			(74.1		)	612.3
Gross profit	—		31.9			15.3			92.0			—			139.2
Selling, general and administrative expenses	—		51.7			—			10.1			—			61.8
Operating income (loss)	—		(19.8		)	15.3			81.9			—			77.4
Non-operating income (expense), net	—		(24.3		)	0.8			(1.4		)	—			(24.9		)
Income (loss) before income taxes	—		(44.1		)	16.1			80.5			—			52.5
Income tax expense (benefit)	—		(0.9		)	—			3.1			—			2.2
Earnings (loss) from equity in subsidiaries	51.2		47.3			(13.5		)	—			(85.0		)	—
Net income before royalties and dividends	51.2		4.1			2.6			77.4			(85.0		)	50.3
Royalties and dividends	—		47.1			—			(47.1		)	—			—
Net income after royalties and dividends	51.2		51.2			2.6			30.3			(85.0		)	50.3
Net loss attributable to noncontrolling interests	—		—			—			0.9			—			0.9
Net income attributable to AAM	$	51.2	$	51.2		$	2.6		$	31.2		$	(85.0	)	$	51.2
Other comprehensive income (loss)	—		(14.4		)	1.7			15.0			—			2.3
Foreign currency translation adjustments attributable to noncontrolling interests	—		—			—			0.2			—			0.2
Comprehensive income attributable to AAM	$	51.2	$	36.8		$	4.3		$	46.0		$	(85.0	)	$	53.3

14

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Condensed Consolidating Balance Sheets
(in millions)
	Holdings			AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Elims			Consolidated
March 31, 2013
Assets
Current assets
Cash and cash equivalents	$	—		$	29.3		$	—		$	71.5	$	—		$	100.8
Accounts receivable, net	—			124.9			31.7			378.7		—			535.3
Inventories, net	—			46.0			32.1			162.5		—			240.6
Other current assets	—			48.7			3.8			75.9		—			128.4
Total current assets	—			248.9			67.6			688.6		—			1,005.1
Property, plant and equipment, net	—			259.3			82.1			702.1		—			1,043.5
Goodwill	—			—			147.8			8.6		—			156.4
Other assets and deferred charges	—			702.8			42.3			79.5		—			824.6
Investment in subsidiaries	215.8			1,142.3			2.5			—		(1,360.6		)	—
Total assets	$	215.8		$	2,353.3		$	342.3		$	1,478.8	$	(1,360.6	)	$	3,029.6
Liabilities and stockholders’ equity (deficit)
Current liabilities
Accounts payable	$	—		$	119.5		$	43.4		$	291.7	$	—		$	454.6
Other current liabilities	—			109.4			4.2			82.9		—			196.5
Total current liabilities	—			228.9			47.6			374.6		—			651.1
Intercompany payable (receivable)	323.7			(434.2		)	(201.1		)	311.6		—			—
Long-term debt	—			1,487.6			5.6			77.0		—			1,570.2
Other long-term liabilities	—			855.2			1.3			59.7		—			916.2
Total liabilities	323.7			2,137.5			(146.6		)	822.9		—			3,137.5
Total AAM Stockholders’ equity (deficit)	(107.9		)	215.8			488.9			655.9		(1,360.6		)	(107.9		)
Noncontrolling interest in subsidiaries	—			—			—			—		—			—
Total stockholders’ equity (deficit)	(107.9		)	215.8			488.9			655.9		(1,360.6		)	(107.9		)
Total liabilities and stockholders’ equity (deficit)	$	215.8		$	2,353.3		$	342.3		$	1,478.8	$	(1,360.6	)	$	3,029.6

15

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

	Holdings			AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Elims			Consolidated
December 31, 2012
Assets
Current assets
Cash and cash equivalents	$	—		$	10.6		$	—		$	51.8	$	—		$	62.4
Accounts receivable, net	—			94.4			25.3			343.7		—			463.4
Inventories, net	—			48.7			31.6			144.0		—			224.3
Other current assets	—			48.8			3.5			69.7		—			122.0
Total current assets	—			202.5			60.4			609.2		—			872.1
Property, plant and equipment, net	—			250.4			84.2			675.1		—			1,009.7
Goodwill	—			—			147.8			8.6		—			156.4
Other assets and deferred charges	—			706.1			40.0			81.7		—			827.8
Investment in subsidiaries	202.9			1,094.6			—			—		(1,297.5		)	—
Total assets	$	202.9		$	2,253.6		$	332.4		$	1,374.6	$	(1,297.5	)	$	2,866.0
Liabilities and stockholders’ equity (deficit)
Current liabilities
Accounts payable	$	—		$	91.4		$	37.3		$	267.4	$	—		$	396.1
Other current liabilities	—			124.5			3.8			76.4		—			204.7
Total current liabilities	—			215.9			41.1			343.8		—			600.8
Intercompany payable (receivable)	323.7			(420.6		)	(188.7		)	285.6		—			—
Long-term debt	—			1,387.5			5.6			61.0		—			1,454.1
Investment in subsidiaries obligation	—			—			7.6			—		(7.6		)	—
Other long-term liabilities	—			867.9			1.2			62.8		—			931.9
Total liabilities	323.7			2,050.7			(133.2		)	753.2		(7.6		)	2,986.8
Total AAM Stockholders’ equity (deficit)	(120.8		)	202.9			465.6			621.4		(1,289.9		)	(120.8		)
Noncontrolling interest in subsidiaries	—			—			—			—		—			—
Total stockholders’ equity (deficit)	(120.8		)	202.9			465.6			621.4		(1,289.9		)	(120.8		)
Total liabilities and stockholders’ equity (deficit)	$	202.9		$	2,253.6		$	332.4		$	1,374.6	$	(1,297.5	)	$	2,866.0

16

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

Condensed Consolidating Statements of Cash Flows
Three months ended March 31, (in millions)
	Holdings		AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Elims		Consolidated
2013
Net cash provided by (used in) operating activities	$	—	$	(42.1	)	$	(2.0	)	$	17.3		$	—	$	(26.8	)
Investing activities
Purchases of property, plant and equipment	—		(13.3		)	(2.2		)	(32.4		)	—		(47.9		)
Proceeds from sale of equipment	—		0.1			—			—			—		0.1
Proceeds from sale-leaseback of equipment	—		3.9			—			—			—		3.9
Net cash used in investing activities	—		(9.3		)	(2.2		)	(32.4		)	—		(43.9		)
Financing activities
Net debt activity	—		99.0			(0.1		)	15.8			—		114.7
Intercompany activity	—		(22.7		)	4.3			18.4			—		—
Debt issuance costs	—		(6.2		)	—			—			—		(6.2		)
Net cash provided by financing activities	—		70.1			4.2			34.2			—		108.5
Effect of exchange rate changes on cash	—		—			—			0.6			—		0.6
Net increase in cash and cash equivalents	—		18.7			—			19.7			—		38.4
Cash and cash equivalents at beginning of period	—		10.6			—			51.8			—		62.4
Cash and cash equivalents at end of period	$	—	$	29.3		$	—		$	71.5		$	—	$	100.8

17

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

	Holdings			AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Elims		Consolidated
2012
Net cash provided by (used in) operating activities	$	—		$	(73.8	)	$	7.5		$	(5.2	)	$	—	$	(71.5	)
Investing activities
Purchases of property, plant and equipment	—			(14.7		)	(1.4		)	(28.4		)	—		(44.5		)
Proceeds from sale of equipment	—			0.1			—			0.8			—		0.9
Net cash used in investing activities	—			(14.6		)	(1.4		)	(27.6		)	—		(43.6		)
Financing activities
Net debt activity	—			59.1			(0.1		)	7.8			—		66.8
Intercompany activity	5.9			(24.3		)	(6.0		)	24.4			—		—
Employee stock option exercises	—			0.1			—			—			—		0.1
Purchase of noncontrolling interest	—			—			—			(4.0		)	—		(4.0		)
Purchase of treasury stock	(5.9		)	—			—			—			—		(5.9		)
Net cash provided by (used in) financing activities	—			34.9			(6.1		)	28.2			—		57.0
Effect of exchange rate changes on cash	—			—			—			1.7			—		1.7
Net decrease in cash and cash equivalents	—			(53.5		)	—			(2.9		)	—		(56.4		)
Cash and cash equivalents at beginning of period	—			83.7			—			85.5			—		169.2
Cash and cash equivalents at end of period	$	—		$	30.2		$	—		$	82.6		$	—	$	112.8

18

Item 2.  Management's Discussion and Analysis of Financial Condition and Results of Operations

This management’s discussion and analysis (MD&A) should be read in conjunction with the unaudited condensed consolidated financial statements and notes appearing elsewhere in this Quarterly Report and our Annual Report on Form 10-K for the year ended December 31, 2012.

Unless the context otherwise requires, references to "we," "our," "us" or "AAM" shall mean collectively (i) American Axle & Manufacturing Holdings, Inc. (Holdings), a Delaware corporation, and (ii) American Axle & Manufacturing, Inc. (AAM, Inc.), a Delaware corporation, and its direct and indirect subsidiaries.  Holdings has no subsidiaries other than AAM, Inc.

COMPANY OVERVIEW

We are a Tier I supplier to the automotive industry.  We manufacture, engineer, design and validate driveline and drivetrain systems and related components and chassis modules for light trucks, sport utility vehicles (SUVs), passenger cars, crossover vehicles and commercial vehicles.  Driveline and drivetrain systems include components that transfer power from the transmission and deliver it to the drive wheels.  Our driveline, drivetrain and related products include axles, chassis modules, driveshafts, power transfer units, transfer cases, chassis and steering components, driveheads, transmission parts and metal-formed products. In addition to locations in the United States (U.S.) (Michigan, Ohio, Indiana and Pennsylvania), we also have offices or facilities in Brazil, China, Germany, India, Japan, Luxembourg, Mexico, Poland, Scotland, South Korea, Sweden and Thailand.

We are the principal supplier of driveline components to General Motors Company (GM) for its rear-wheel drive (RWD) light trucks and SUVs manufactured in North America, supplying substantially all of GM’s rear axle and front four-wheel drive and all-wheel drive (4WD/AWD) axle requirements for these vehicle platforms.  Sales to GM were approximately 75% of our total net sales in the first quarter of 2013, as compared to 74% in the first quarter of 2012 and 73% for the full-year 2012.

We are the sole-source supplier to GM for certain axles and other driveline products for the life of each GM vehicle program covered by a Lifetime Program Contract (LPC).  Substantially all of our sales to GM are made pursuant to the LPCs.  The LPCs have terms equal to the lives of the relevant vehicle programs or their respective derivatives, which typically run 5 to 7 years, and require us to remain competitive with respect to technology, design and quality.

We are also the principal supplier of driveline system products for the Chrysler Group LLC’s (Chrysler) heavy-duty Ram full-size pickup trucks and its derivatives.  Sales to Chrysler were approximately 7% of our total net sales in the first quarter of 2013, as compared to 9% in the first quarter of 2012 and 10% for the full-year 2012. In addition to GM and Chrysler, we supply driveline systems and other related components to Volkswagen AG, Audi AG, Scania AB, Mack Trucks Inc., PACCAR Inc., Nissan Motor Co. Ltd., Harley-Davidson Inc., Tata Motors, Ford Motor Company, Beijing Benz Automotive Co., Ltd., Deere & Company and other original equipment manufacturers (OEMs) and Tier I supplier companies such as Jatco Ltd. and Hino Motors Ltd. Our net sales to customers other than GM were $188.1 million in the first quarter of 2013 as compared to $193.6 million in the first quarter of 2012.

19

RESULTS OF OPERATIONS –– THREE MONTHS ENDED MARCH 31, 2013 AS COMPARED TO THREE MONTHS ENDED MARCH 31, 2012

Net Sales  Net sales increased to $755.6 million in the first quarter of 2013 as compared to $751.5 million in the first quarter of 2012.  The change in sales in the first quarter of 2013 as compared to the first quarter of 2012 primarily reflects an increase in global launch activity, offset by a decrease of approximately 11% in production volumes for the major North American light truck and SUV programs we currently support and a reduction in deferred revenue recognition related to the 2008 AAM - GM Agreement. Sales in the first quarter of 2013 also reflect the adverse impact of the labor strike at General Motors' Rayong factory in Thailand, which we estimate to be approximately $12.5 million.

Our content-per-vehicle (as measured by the dollar value of our products supporting our customers' North American light truck and SUV programs) increased to $1,504 in the first quarter of 2013 as compared to $1,475 in the first quarter of 2012. Our 4WD/AWD penetration rate on these vehicle programs increased to 67.2% in the first quarter 2013 as compared to 64.6% in the first quarter of 2012.

Gross Profit  Gross profit was $104.3 million in the first quarter of 2013 as compared to $139.2 million in the first quarter of 2012.  Gross margin was 13.8% in the first quarter of 2013 as compared to 18.5% in the first quarter of 2012.  The change in gross profit and margin in the first quarter of 2013, as compared to the first quarter of 2012, primarily reflects an increase in global launch activity, which includes higher project expense and other launch preparation costs, higher start-up and quality containment costs and lower capacity utilization. Gross profit in the first quarter of 2012 reflected the impact of a $21.8 million other postretirement benefits (OPEB) curtailment gain as a result of the Detroit Manufacturing Complex (DMC) and Cheektowaga Manufacturing Facility (CKMF) hourly associates who terminated employment from AAM as a result of our plant closures. Gross profit and gross margin in the first quarter of 2012 were also negatively impacted by $16.0 million of special charges and other restructuring costs, primarily related to asset redeployment and other costs related to the closures of DMC and CKMF.

Selling, General and Administrative Expenses (SG&A)  SG&A (including research and development (R&D)) decreased to $59.6 million or 7.9% of net sales in the first quarter of 2013 as compared to $61.8 million or 8.2% of net sales in the first quarter of 2012.  R&D was $28.5 million in the first quarter of 2013 as compared to $30.1 million in the first quarter of 2012. The decrease in SG&A in the first quarter of 2013 primarily reflects the reduction in R&D spending.

Operating Income  Operating income was $44.7 million in the first quarter of 2013 as compared to $77.4 million in the first quarter of 2012.  Operating margin was 5.9% in the first quarter of 2013 as compared to 10.3% in the first quarter of 2012.  The changes in operating income and operating margin were due to factors discussed in Net Sales and Gross Profit above.

Interest Expense and Investment Income Interest expense was $29.1 million in the first quarter of 2013 as compared to $24.0 million in the first quarter of 2012. The increase in interest expense reflects higher average outstanding borrowings in the first quarter of 2013 as compared to the first quarter of 2012. Investment income was $0.1 million in the first quarter of 2013 as compared to $0.3 million in the first quarter of 2012.  

The weighted-average interest rate of our long-term debt outstanding was 7.7% in the first quarter of 2013 and 7.9% in the first quarter of 2012.

Other Income (Expense) Following are the components of Other Income (Expense) for the first quarter of 2013 and 2012:

Debt Refinancing and Redemption Costs In the first quarter of 2013, we expensed$11.3 million of unamortized debt issuance costs and prepayment premiums related to the termination of our class C Revolving Credit Facility, the purchase of $172.6 million of our 7.875% Notes pursuant to a tender offer and the subsequent redemption of the remaining $127.4 million of our 7.875% Notes.

Other, Net Other, net, which includes the net effect of our proportionate share of earnings from equity in unconsolidated subsidiaries and foreign exchange gains and losses, was income of $0.5 million in the first quarter of 2013 as compared to a loss of $1.2 million in the first quarter of 2012.

Income Tax Expense (Benefit)  Income tax expense (benefit) was a benefit of $2.4 million in the first quarter of 2013 as compared to expense of $2.2 million in the first quarter of 2012.  Our effective income tax rate was negative 48.1% in the first quarter of 2013 as compared to 4.3% in the first quarter of 2012. Our income tax benefit and effective tax rate for the three months ended March 31, 2013 primarily reflect favorable foreign tax rates, along with our inability to realize a tax benefit for

20

current foreign losses. Our income tax benefit and effective tax rate for the three months ended March 31, 2013 also reflect a tax benefit of $1.5 million relating to the release of a prior year unrecognized tax benefit due to the expiration of the applicable statute of limitations and a benefit of $3.3 million relating to an election we made in the first quarter of 2013 regarding the treatment of foreign exchange gains and losses in a foreign jurisdiction.

Our income tax expense and effective tax rate for the three months ended March 31, 2012 primarily reflected recognizing a net operating loss benefit against our taxable income in the U.S., as well as the effect of recognizing a tax benefit of $1.1 million relating to the release of a prior year unrecognized tax benefit for which the statute of limitations had expired and tax expense of $0.7 million relating to foreign withholding taxes paid for which a foreign tax credit could not be realized.

Net Loss Attributable to Noncontrolling Interests Net loss attributable to noncontrolling interests was $0.9 million in the first quarter of 2012. The noncontrolling interest in e-AAM was acquired in the first quarter of 2012, so there is no longer an allocation of net loss attributable to noncontrolling interests related to this entity.

Net Income Attributable to AAM and Earnings Per Share (EPS) Net income attributable to AAM was $7.3 million in the first quarter of 2013 as compared to $51.2 million in the first quarter of 2012. Diluted EPS was $0.10 in the first quarter of 2013 as compared to $0.68 in the first quarter of 2012. Net income attributable to AAM and EPS for the first quarters of 2013 and 2012 were primarily impacted by the factors discussed in Gross Profit and Debt Refinancing and Redemption Costs above.

LIQUIDITY AND CAPITAL RESOURCES

Our primary liquidity needs are to fund capital expenditures, debt service obligations and our working capital requirements.  We believe that operating cash flow, available cash and cash equivalent balances and available committed borrowing capacity under our Revolving Credit Facility will be sufficient to meet these needs. 

Operating Activities  In the first quarter of 2013, net cash used in operating activities was $26.8 million as compared to $71.5 million in the first quarter of 2012.  The following factors impacted cash used in operating activities in the first quarter of 2013 as compared to the first quarter of 2012:

Cash paid for special charges  In the first quarter of 2012, we made cash payments of $20.9 million for special charges primarily related to asset redeployment and capital expenditures associated with the closure of DMC and CKMF.  

GM payment terms As a result of a change in the administration of GM supplier payment terms from pay on shipment to pay on receipt, our operating cash flow was negatively impacted by approximately $16 million in the first quarter of 2012.

Pension and other postretirement benefits  Due to our significant pension contributions made in 2012, we will not make any cash payments in 2013 to satisfy our regulatory funding requirements. As a result of discretionary pension funding in the fourth quarter of 2011, we were not required to make any significant pension contributions in the first quarter of 2012. We expect our cash outlay for other postretirement benefit obligations in 2013, net of GM cost sharing, to be approximately $15 million.

Investing Activities  Capital expenditures were $47.9 million in the first quarter of 2013 as compared to $44.5 million in the first quarter of 2012.  We expect our capital spending, net of proceeds from the sale-leaseback of equipment and the sale of property, plant and equipment in 2013 to approximate 7% of sales, which includes support for our significant global program launches in 2013 and 2014 within our new and incremental business backlog.

In the first quarter of 2013, we entered into a sale-leaseback transaction for equipment recently purchased. We received proceeds of $3.9 million in the first quarter of 2013 related to this transaction.

Financing Activities  In the first quarter of 2013, net cash provided by financing activities was $108.5 million as compared to $57.0 million in the first quarter of 2012.  Total long-term debt outstanding increased $116.1 million in the first quarter of 2013 to $1,570.2 million as compared to $1,454.1 million at year-end 2012, primarily as a result of the issuance of $400.0 million of 6.25% senior unsecured notes in the first quarter of 2013, which was partially offset by using the proceeds to purchase and redeem $300.0 million of our 7.875% Notes.

6.25% Notes In the first quarter of 2013, we issued $400.0 million of 6.25% senior unsecured notes due 2021 (6.25% Notes). Concurrent with the offering of the 6.25% Notes, we made a tender offer to repurchase our 7.875% Notes, of which the aggregate principal amount outstanding at the time of the tender offer was $300.0 million. Net proceeds from the 6.25% Notes were used to fund the purchase pursuant to the tender offer and the subsequent redemption of the entire $300.0 million of the

21

7.875% Notes and for other general corporate purposes. We paid debt issuance costs of $6.2 million in the first quarter of 2013 related to the 6.25% Notes.

7.875% Notes On March 1, 2013, in connection with the cash tender offer, we purchased $172.6 million aggregate principal amount of the 7.875% Notes, and paid accrued interest. Upon purchase, we expensed $5.2 million related to a tender premium, $0.2 million of professional fees and unamortized debt issuance costs of $1.2 million related to this debt. We had been amortizing the debt issuance costs over the expected life of the borrowing.

On March 15, 2013, we voluntarily redeemed the remaining 7.875% Notes outstanding. This resulted in a principal payment of $127.4 million, a payment of $3.3 million related to a redemption premium, as well as payment of accrued interest. Upon redemption, we expensed $0.9 million of unamortized debt issuance costs related to this debt. We had been amortizing the debt issuance costs over the expected life of the borrowing.

9.25% Notes Pursuant to the terms of our 9.25% Notes, we have the right to voluntarily redeem an additional 10% of our 9.25% Notes in October 2013. In addition, we have the right to voluntarily redeem any remaining 9.25% Notes outstanding in January 2014. We may elect to exercise our rights to redeem all or part of the remaining 9.25% Notes, subject to our liquidity position and the appropriate market conditions.

Revolving Credit Facility On March 20, 2013, we terminated our class C loan facility of $72.8 million, which would have matured on June 30, 2013. Upon termination, we expensed $0.5 million of unamortized debt issuance costs related to the class C facility. We had been amortizing the debt issuance costs over the expected life of the borrowing. As of March 31, 2013, the Revolving Credit Facility provided up to $365.0 million of revolving bank financing commitments through June 30, 2016.  At March 31, 2013, we had $342.1 million available under the Revolving Credit Facility.  This availability reflects a reduction of $22.9 million for standby letters of credit issued against the facility.

We utilize foreign credit facilities and uncommitted lines of credit to finance working capital needs.  At March 31, 2013, $77.0 million was outstanding with an additional $13.6 million available under these facilities.

In the first quarter of 2012, we paid $4.0 million to acquire the remaining shares of e-AAM Driveline Systems AB (e-AAM). e-AAM, previously a joint venture between AAM and Saab Automobile AB, was created to design and commercialize electric and hybrid driveline systems designed to improve fuel efficiency, reduce CO₂ emissions and provide all-wheel-drive capability.

In the first quarter of 2012, we repurchased 0.5 million shares of AAM common stock for $5.9 million to satisfy employee tax withholding obligations due upon the vesting of our 2007 and 2009 restricted stock grants.

CYCLICALITY AND SEASONALITY

Our operations are cyclical because they are directly related to worldwide automotive production, which is itself cyclical and dependent on general economic conditions and other factors.  Our business is also moderately seasonal as our major OEM customers historically have an extended shutdown of operations (typically 1-2 weeks) in conjunction with their model year changeover and an approximate one-week shutdown in December.  Accordingly, our quarterly results may reflect these trends.

LITIGATION AND ENVIRONMENTAL MATTERS

We are involved in various legal proceedings incidental to our business.  Although the outcome of these matters cannot be predicted with certainty, we do not believe that any of these matters, individually or in the aggregate, will have a material adverse effect on our financial condition, results of operations or cash flows.

We are subject to various federal, state, local and foreign environmental and occupational safety and health laws, regulations and ordinances, including those regulating air emissions, water discharge, waste management and environmental cleanup. We will continue to closely monitor our environmental conditions to ensure that we are in compliance with all laws, regulations and ordinances.  We have made, and will continue to make, capital and other expenditures (including recurring administrative costs) to comply with environmental requirements.  Such expenditures were not significant in the first quarter of 2013, and we do not expect such expenditures to be significant for the remainder of 2013.

22

Item 3.  Quantitative and Qualitative Disclosures About Market Risk

MARKET RISK

Our business and financial results are affected by fluctuations in world 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 Exchange Risk  From time to time, we use foreign currency forward contracts to reduce the effects of fluctuations in exchange rates, primarily relating to the Mexican Peso, Euro and Pound Sterling.  At March 31, 2013, we had currency forward contracts with a notional amount of $26.8 million outstanding.  The potential decrease in fair value of foreign exchange contracts, assuming a 10% adverse change in the foreign currency exchange rates, would be approximately $2.4 million at March 31, 2013.

Future business operations and opportunities, including the expansion of our business outside North America, may further increase the risk that cash flows resulting from these activities may be adversely affected by changes in currency exchange rates.  If and when appropriate, we intend to manage these risks by utilizing local currency funding of these expansions and various types of foreign exchange contracts.

Interest Rate Risk  We are exposed to variable interest rates on certain credit facilities.  From time to time, we have used interest rate hedging to reduce the effects of fluctuations in market interest rates.  As of March 31, 2013, there are no interest rate swaps in place.  The pre-tax earnings and cash flow impact of a one-percentage-point increase in interest rates (approximately 13% of our weighted-average interest rate at March 31, 2013) on our long-term debt outstanding at March 31, 2013 would be approximately $0.7 million on an annualized basis.

Item 4.  Controls and Procedures

Under the direction of our Chief Executive Officer and Chief Financial Officer, we evaluated our disclosure controls and procedures and internal control over financial reporting and concluded that (1) our disclosure controls and procedures (as defined in Rules 13a-15(e) or 15d-15(e) under the Securities Exchange Act of 1934 (the “Exchange Act”)) were effective as of March 31, 2013, and (2) no change in internal control over financial reporting occurred during the quarter ended March 31, 2013 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

23

PART II.  OTHER  INFORMATION

Item 1A. Risk Factors

There were no material changes from the risk factors previously disclosed in our December 31, 2012 Form 10-K.

Item 6.  Exhibits

Exhibits required by Item 601 of Regulation S-K are listed in the Exhibit Index.

24

SIGNATURES

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

AMERICAN AXLE & MANUFACTURING HOLDINGS, INC.

(Registrant)

/s/ Michael K. Simonte

Michael K. Simonte

Executive Vice President & Chief Financial Officer

(also in the capacity of Chief Accounting Officer)

May 3, 2013

25

EXHIBIT INDEX

Number	Description of Exhibit
*31.1	Certification of David C. Dauch, President & Chief Executive Officer Pursuant to Rule 13a-14(a) of the Securities Exchange Act
*31.2	Certification of Michael K. Simonte, Executive Vice President & Chief Financial Officer Pursuant to Rule 13a-14(a) of the Securities Exchange Act
*32	Certifications of David C. Dauch, President & Chief Executive Officer and Michael K. Simonte, Executive Vice President & Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
**101.INS	XBRL Instance Document
**101.SCH	XBRL Taxonomy Extension Schema Document
**101.PRE	XBRL Extension Presentation Linkbase Document
**101.LAB	XBRL Taxonomy Extension Label Linkbase Document
**101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
**101.DEF	XBRL Taxonomy Extension Definition Linkbase Document

*    Filed herewith

**    Submitted electronically with this Report

26

EX-31.1

EXHIBIT 31.1 - CERTIFICATION PURSUANT TO RULE 13a-14(a)

OF THE SECURITIES EXCHANGE ACT

I, David C. Dauch, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of American Axle & Manufacturing Holdings, Inc.;

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

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

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

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

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

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

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

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

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

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

Date: May 3, 2013

/s/ David C. Dauch

David C. Dauch

President & Chief Executive Officer

(Principal Executive Officer) 

EX-31.2

EXHIBIT 31.2 - CERTIFICATION PURSUANT TO RULE 13a-14(a)

OF THE SECURITIES EXCHANGE ACT

I, Michael K. Simonte, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of American Axle & Manufacturing Holdings, Inc.;

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

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

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

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

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

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

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

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

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

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

Date: May 3, 2013

/s/ Michael K. Simonte

Michael K. Simonte

Executive Vice President & Chief Financial Officer

(Principal Financial Officer)

EX-32

EXHIBIT 32 - CERTIFICATIONS PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of American Axle & Manufacturing Holdings, Inc. (Issuer) on Form 10-Q for the period ending March 31, 2013 as filed with the Securities and Exchange Commission on the date hereof (Report), I, David C. Dauch, President & Chief Executive Officer of the Issuer, and I, Michael K. Simonte, Executive Vice President & Chief Financial Officer of the Issuer, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

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

(2)  The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Issuer.

/s/ David C. Dauch	/s/  Michael K. Simonte
David C. Dauch	Michael K. Simonte
President &	Executive Vice President &
Chief Executive Officer	Chief Financial Officer
May 3, 2013	May 3, 2013

XML

Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Defined benefit plans	$ (275.6)		$ (274.5)
Defined benefit plans, other comprehensive income (loss), net unamortized gain (loss) arising during period, net of tax	(3.6)
Defined benefit plans, other comprehensive income (loss), reclassification, net gain (loss) recognized in net periodic benefit cost, net of tax	2.5
Defined benefit plans, net of $0.7 million of tax in 2013	(1.1)	(14.0)
Foreign currency translation adjustments	12.5		7.6
Foreign currency translation adjustments, other comprehensive income (loss) arising during period, net of tax	4.9
Foreign currency translation adjustments, other comprehensive income (loss), reclassification adjustment, net of tax	0
Foreign currency translation adjustments	4.9	10.7
Unrecognized gain on derivatives	2.8		2.3
Unrecognized gain on derivatives, other comprehensive income (loss), gain (loss) arising during period, net of tax	1.7
Unrecognized gain on derivatives, other comprehensive income (loss), reclassification adjustment, net of tax	(1.2)
Change in derivatives	0.5	5.6
Accumulated other comprehensive income (loss), net of tax	(260.3)		(264.6)
Other comprehensive income (loss) arising during period, total, net of tax	3.0
Other comprehensive income (loss), reclassification adjustments, total, net of tax	1.3
Other comprehensive income	$ 4.3	$ 2.3

XML

Fair Value of Debt (Details) (Fair Value, Inputs, Level 2 [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Revolving Credit Facility [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Line of Credit Facility, Amount Outstanding	$ 0	$ 0
Revolving Credit Facility [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Fair Value Disclosure	0	0
9.25% Notes [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable	337.6	337.5
9.25% Notes [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Fair Value Disclosure	373.2	377.4
7.875% Notes [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable	0	300.0
7.875% Notes [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Fair Value Disclosure	0	310.1
7.75% Notes [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable	200.0	200.0
7.75% Notes [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Fair Value Disclosure	219.7	216.5
6.625% Notes [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable	550.0	550.0
6.625% Notes [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Fair Value Disclosure	565.8	555.5
6.25% Notes [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable	400.0	0
6.25% Notes [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Fair Value Disclosure	$ 408.5	$ 0

XML

Product Warranties (Tables)

3 Months Ended

Mar. 31, 2013

Commitments and Contingencies [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
	March 31,
	2013			2012
	(in millions)
Beginning balance	$	29.1		$	13.4
Accruals	3.2			3.6
Settlements	(9.2		)	(0.2		)
Adjustment to prior period accruals	(0.2		)	(0.1		)
Foreign currency translation and other	—			0.1
Ending balance	$	22.9		$	16.8

XML

Supplemental Guarantor Condensed Consolidating Statements of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net cash provided by (used in) operating activities	$ (26.8)	$ (71.5)
Investing activities
Purchases of property, plant and equipment	(47.9)	(44.5)
Proceeds from sale of property, plant and equipment	0.1	0.9
Proceeds from sale-leaseback of equipment	3.9	0
Net cash used in investing activities	(43.9)	(43.6)
Financing Activities
Net debt activity	114.7	66.8
Intercompany activity	0	0
Debt issuance costs	(6.2)	0
Employee stock option exercises	0	0.1
Purchase of noncontrolling interest	0	(4.0)
Purchase of treasury stock	0	(5.9)
Net cash provided by financing activities	108.5	57.0
Effect of exchange rate changes on cash	0.6	1.7
Net increase (decrease) in cash and cash equivalents	38.4	(56.4)
Cash and cash equivalents	100.8	112.8
Holdings [Member]
Net cash provided by (used in) operating activities	0	0
Investing activities
Purchases of property, plant and equipment	0	0
Proceeds from sale of property, plant and equipment	0	0
Proceeds from sale-leaseback of equipment	0
Net cash used in investing activities	0	0
Financing Activities
Net debt activity	0	0
Intercompany activity	0	5.9
Debt issuance costs	0
Employee stock option exercises		0
Purchase of noncontrolling interest		0
Purchase of treasury stock		(5.9)
Net cash provided by financing activities	0	0
Effect of exchange rate changes on cash	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents	0	0
AAM Inc. [Member]
Net cash provided by (used in) operating activities	(42.1)	(73.8)
Investing activities
Purchases of property, plant and equipment	(13.3)	(14.7)
Proceeds from sale of property, plant and equipment	0.1	0.1
Proceeds from sale-leaseback of equipment	3.9
Net cash used in investing activities	(9.3)	(14.6)
Financing Activities
Net debt activity	99.0	59.1
Intercompany activity	(22.7)	(24.3)
Debt issuance costs	(6.2)
Employee stock option exercises		0.1
Purchase of noncontrolling interest		0
Purchase of treasury stock		0
Net cash provided by financing activities	70.1	34.9
Effect of exchange rate changes on cash	0	0
Net increase (decrease) in cash and cash equivalents	18.7	(53.5)
Cash and cash equivalents	29.3	30.2
Guarantor Subsidiaries [Member]
Net cash provided by (used in) operating activities	(2.0)	7.5
Investing activities
Purchases of property, plant and equipment	(2.2)	(1.4)
Proceeds from sale of property, plant and equipment	0	0
Proceeds from sale-leaseback of equipment	0
Net cash used in investing activities	(2.2)	(1.4)
Financing Activities
Net debt activity	(0.1)	(0.1)
Intercompany activity	4.3	(6.0)
Debt issuance costs	0
Employee stock option exercises		0
Purchase of noncontrolling interest		0
Purchase of treasury stock		0
Net cash provided by financing activities	4.2	(6.1)
Effect of exchange rate changes on cash	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents	0	0
Non-Guarantor Subsidiaries [Member]
Net cash provided by (used in) operating activities	17.3	(5.2)
Investing activities
Purchases of property, plant and equipment	(32.4)	(28.4)
Proceeds from sale of property, plant and equipment	0	0.8
Proceeds from sale-leaseback of equipment	0
Net cash used in investing activities	(32.4)	(27.6)
Financing Activities
Net debt activity	15.8	7.8
Intercompany activity	18.4	24.4
Debt issuance costs	0
Employee stock option exercises		0
Purchase of noncontrolling interest		(4.0)
Purchase of treasury stock		0
Net cash provided by financing activities	34.2	28.2
Effect of exchange rate changes on cash	0.6	1.7
Net increase (decrease) in cash and cash equivalents	19.7	(2.9)
Cash and cash equivalents	71.5	82.6
Elims [Member]
Net cash provided by (used in) operating activities	0	0
Investing activities
Purchases of property, plant and equipment	0	0
Proceeds from sale of property, plant and equipment	0	0
Proceeds from sale-leaseback of equipment	0
Net cash used in investing activities	0	0
Financing Activities
Net debt activity	0	0
Intercompany activity	0	0
Debt issuance costs	0
Employee stock option exercises		0
Purchase of noncontrolling interest		0
Purchase of treasury stock		0
Net cash provided by financing activities	0	0
Effect of exchange rate changes on cash	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents	$ 0	$ 0

XML

Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income tax expense (benefit)	$ (2.4)	$ 2.2
Effective income tax rate, continuing operations	(48.10%)	4.30%
Unrecognized tax benefits, reductions resulting from lapse of applicable statute of limitations	1.5	1.1
Income tax expense (benefit), other	$ (3.3)	$ (0.7)

XML

Restructuring Actions

3 Months Ended

Mar. 31, 2013

Restructuring Actions [Abstract]

Restructuring, Impairment, and Other Activities Disclosure [Text Block]

2. RESTRUCTURING ACTIONS

There were no payments made in the first quarter of 2013 related to our remaining asset retirement obligation of $0.5 million, as of March 31, 2013.

In the first quarter of 2012, we incurred charges related to the redeployment of assets and other related costs associated with the closure of our Detroit Manufacturing Complex (DMC) and Cheektowaga Manufacturing Facility (CKMF). We expensed and paid $12.2 million in the first quarter of 2012, related to these actions.

XML

Restructuring Actions (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2013 Asset Retirement Obligations [Member]
Restructuring Cost and Reserve [Line Items]
Charges	$ 12.2
Cash utilization	12.2
Restructuring reserve		$ 0.5

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Supplemental Guarantor Condensed Consolidating Financial Statements (Tables)

3 Months Ended

Mar. 31, 2013

Supplemental Guarantor Condensed Consolidating Financial Statements -9.25% Notes [Abstract]

Supplemental Guarantor Consolidating Income Statement [Table Text Block]

	Holdings		AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Elims			Consolidated
2012
Net sales
External	$	—	$	198.3		$	54.5		$	498.7		$	—		$	751.5
Intercompany	—		7.6			60.7			5.8			(74.1		)	—
Total net sales	—		205.9			115.2			504.5			(74.1		)	751.5
Cost of goods sold	—		174.0			99.9			412.5			(74.1		)	612.3
Gross profit	—		31.9			15.3			92.0			—			139.2
Selling, general and administrative expenses	—		51.7			—			10.1			—			61.8
Operating income (loss)	—		(19.8		)	15.3			81.9			—			77.4
Non-operating income (expense), net	—		(24.3		)	0.8			(1.4		)	—			(24.9		)
Income (loss) before income taxes	—		(44.1		)	16.1			80.5			—			52.5
Income tax expense (benefit)	—		(0.9		)	—			3.1			—			2.2
Earnings (loss) from equity in subsidiaries	51.2		47.3			(13.5		)	—			(85.0		)	—
Net income before royalties and dividends	51.2		4.1			2.6			77.4			(85.0		)	50.3
Royalties and dividends	—		47.1			—			(47.1		)	—			—
Net income after royalties and dividends	51.2		51.2			2.6			30.3			(85.0		)	50.3
Net loss attributable to noncontrolling interests	—		—			—			0.9			—			0.9
Net income attributable to AAM	$	51.2	$	51.2		$	2.6		$	31.2		$	(85.0	)	$	51.2
Other comprehensive income (loss)	—		(14.4		)	1.7			15.0			—			2.3
Foreign currency translation adjustments attributable to noncontrolling interests	—		—			—			0.2			—			0.2
Comprehensive income attributable to AAM	$	51.2	$	36.8		$	4.3		$	46.0		$	(85.0	)	$	53.3

Condensed Consolidating Statements of Income
Three Months Ended March 31,
(in millions)
	Holdings		AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Elims			Consolidated
2013
Net sales
External	$	—	$	200.3		$	53.9		$	501.4		$	—		$	755.6
Intercompany	—		3.4			57.6			4.9			(65.9		)	—
Total net sales	—		203.7			111.5			506.3			(65.9		)	755.6
Cost of goods sold	—		198.5			97.2			421.5			(65.9		)	651.3
Gross profit	—		5.2			14.3			84.8			—			104.3
Selling, general and administrative expenses	—		48.9			—			10.7			—			59.6
Operating income (loss)	—		(43.7		)	14.3			74.1			—			44.7
Non-operating income (expense), net	—		(41.5		)	2.7			(1.0		)	—			(39.8		)
Income (loss) before income taxes	—		(85.2		)	17.0			73.1			—			4.9
Income tax benefit	—		(1.6		)	—			(0.8		)	—			(2.4		)
Earnings (loss) from equity in subsidiaries	7.3		40.4			(3.2		)	—			(44.5		)	—
Net income (loss) before royalties and dividends	7.3		(43.2		)	13.8			73.9			(44.5		)	7.3
Royalties and dividends	—		50.5			—			(50.5		)	—			—
Net income after royalties and dividends	7.3		7.3			13.8			23.4			(44.5		)	7.3
Net loss attributable to noncontrolling interests	—		—			—			—			—			—
Net income attributable to AAM	$	7.3	$	7.3		$	13.8		$	23.4		$	(44.5	)	$	7.3
Other comprehensive income	4.3		4.3			7.7			8.3			(20.3		)	4.3
Comprehensive income attributable to AAM	$	11.6	$	11.6		$	21.5		$	31.7		$	(64.8	)	$	11.6

Supplemental Guarantor Consolidating Balance Sheet [Table Text Block]

Condensed Consolidating Balance Sheets
(in millions)
	Holdings			AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Elims			Consolidated
March 31, 2013
Assets
Current assets
Cash and cash equivalents	$	—		$	29.3		$	—		$	71.5	$	—		$	100.8
Accounts receivable, net	—			124.9			31.7			378.7		—			535.3
Inventories, net	—			46.0			32.1			162.5		—			240.6
Other current assets	—			48.7			3.8			75.9		—			128.4
Total current assets	—			248.9			67.6			688.6		—			1,005.1
Property, plant and equipment, net	—			259.3			82.1			702.1		—			1,043.5
Goodwill	—			—			147.8			8.6		—			156.4
Other assets and deferred charges	—			702.8			42.3			79.5		—			824.6
Investment in subsidiaries	215.8			1,142.3			2.5			—		(1,360.6		)	—
Total assets	$	215.8		$	2,353.3		$	342.3		$	1,478.8	$	(1,360.6	)	$	3,029.6
Liabilities and stockholders’ equity (deficit)
Current liabilities
Accounts payable	$	—		$	119.5		$	43.4		$	291.7	$	—		$	454.6
Other current liabilities	—			109.4			4.2			82.9		—			196.5
Total current liabilities	—			228.9			47.6			374.6		—			651.1
Intercompany payable (receivable)	323.7			(434.2		)	(201.1		)	311.6		—			—
Long-term debt	—			1,487.6			5.6			77.0		—			1,570.2
Other long-term liabilities	—			855.2			1.3			59.7		—			916.2
Total liabilities	323.7			2,137.5			(146.6		)	822.9		—			3,137.5
Total AAM Stockholders’ equity (deficit)	(107.9		)	215.8			488.9			655.9		(1,360.6		)	(107.9		)
Noncontrolling interest in subsidiaries	—			—			—			—		—			—
Total stockholders’ equity (deficit)	(107.9		)	215.8			488.9			655.9		(1,360.6		)	(107.9		)
Total liabilities and stockholders’ equity (deficit)	$	215.8		$	2,353.3		$	342.3		$	1,478.8	$	(1,360.6	)	$	3,029.6

	Holdings			AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Elims			Consolidated
December 31, 2012
Assets
Current assets
Cash and cash equivalents	$	—		$	10.6		$	—		$	51.8	$	—		$	62.4
Accounts receivable, net	—			94.4			25.3			343.7		—			463.4
Inventories, net	—			48.7			31.6			144.0		—			224.3
Other current assets	—			48.8			3.5			69.7		—			122.0
Total current assets	—			202.5			60.4			609.2		—			872.1
Property, plant and equipment, net	—			250.4			84.2			675.1		—			1,009.7
Goodwill	—			—			147.8			8.6		—			156.4
Other assets and deferred charges	—			706.1			40.0			81.7		—			827.8
Investment in subsidiaries	202.9			1,094.6			—			—		(1,297.5		)	—
Total assets	$	202.9		$	2,253.6		$	332.4		$	1,374.6	$	(1,297.5	)	$	2,866.0
Liabilities and stockholders’ equity (deficit)
Current liabilities
Accounts payable	$	—		$	91.4		$	37.3		$	267.4	$	—		$	396.1
Other current liabilities	—			124.5			3.8			76.4		—			204.7
Total current liabilities	—			215.9			41.1			343.8		—			600.8
Intercompany payable (receivable)	323.7			(420.6		)	(188.7		)	285.6		—			—
Long-term debt	—			1,387.5			5.6			61.0		—			1,454.1
Investment in subsidiaries obligation	—			—			7.6			—		(7.6		)	—
Other long-term liabilities	—			867.9			1.2			62.8		—			931.9
Total liabilities	323.7			2,050.7			(133.2		)	753.2		(7.6		)	2,986.8
Total AAM Stockholders’ equity (deficit)	(120.8		)	202.9			465.6			621.4		(1,289.9		)	(120.8		)
Noncontrolling interest in subsidiaries	—			—			—			—		—			—
Total stockholders’ equity (deficit)	(120.8		)	202.9			465.6			621.4		(1,289.9		)	(120.8		)
Total liabilities and stockholders’ equity (deficit)	$	202.9		$	2,253.6		$	332.4		$	1,374.6	$	(1,297.5	)	$	2,866.0

Supplemental Guarantor Consolidating Statement of Cash Flows [Table Text Block]

	Holdings			AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Elims		Consolidated
2012
Net cash provided by (used in) operating activities	$	—		$	(73.8	)	$	7.5		$	(5.2	)	$	—	$	(71.5	)
Investing activities
Purchases of property, plant and equipment	—			(14.7		)	(1.4		)	(28.4		)	—		(44.5		)
Proceeds from sale of equipment	—			0.1			—			0.8			—		0.9
Net cash used in investing activities	—			(14.6		)	(1.4		)	(27.6		)	—		(43.6		)
Financing activities
Net debt activity	—			59.1			(0.1		)	7.8			—		66.8
Intercompany activity	5.9			(24.3		)	(6.0		)	24.4			—		—
Employee stock option exercises	—			0.1			—			—			—		0.1
Purchase of noncontrolling interest	—			—			—			(4.0		)	—		(4.0		)
Purchase of treasury stock	(5.9		)	—			—			—			—		(5.9		)
Net cash provided by (used in) financing activities	—			34.9			(6.1		)	28.2			—		57.0
Effect of exchange rate changes on cash	—			—			—			1.7			—		1.7
Net decrease in cash and cash equivalents	—			(53.5		)	—			(2.9		)	—		(56.4		)
Cash and cash equivalents at beginning of period	—			83.7			—			85.5			—		169.2
Cash and cash equivalents at end of period	$	—		$	30.2		$	—		$	82.6		$	—	$	112.8

Condensed Consolidating Statements of Cash Flows
Three months ended March 31, (in millions)
	Holdings		AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Elims		Consolidated
2013
Net cash provided by (used in) operating activities	$	—	$	(42.1	)	$	(2.0	)	$	17.3		$	—	$	(26.8	)
Investing activities
Purchases of property, plant and equipment	—		(13.3		)	(2.2		)	(32.4		)	—		(47.9		)
Proceeds from sale of equipment	—		0.1			—			—			—		0.1
Proceeds from sale-leaseback of equipment	—		3.9			—			—			—		3.9
Net cash used in investing activities	—		(9.3		)	(2.2		)	(32.4		)	—		(43.9		)
Financing activities
Net debt activity	—		99.0			(0.1		)	15.8			—		114.7
Intercompany activity	—		(22.7		)	4.3			18.4			—		—
Debt issuance costs	—		(6.2		)	—			—			—		(6.2		)
Net cash provided by financing activities	—		70.1			4.2			34.2			—		108.5
Effect of exchange rate changes on cash	—		—			—			0.6			—		0.6
Net increase in cash and cash equivalents	—		18.7			—			19.7			—		38.4
Cash and cash equivalents at beginning of period	—		10.6			—			51.8			—		62.4
Cash and cash equivalents at end of period	$	—	$	29.3		$	—		$	71.5		$	—	$	100.8

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Inventories (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Raw materials and work-in-progress	$ 241.0	$ 220.3
Finished goods	27.9	25.0
Gross inventories	268.9	245.3
Inventory valuation reserves	(28.3)	(21.0)
Inventories, net	$ 240.6	$ 224.3

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Long-Term Debt (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended							3 Months Ended														3 Months Ended			3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 Revolving Credit Facility [Member]	Dec. 31, 2012 Revolving Credit Facility [Member]	Mar. 31, 2013 Secured Debt [Member] 9.25% Notes [Member]	Dec. 31, 2012 Secured Debt [Member] 9.25% Notes [Member]	Mar. 31, 2013 Unsecured Debt [Member] 7.875% Notes [Member]	Mar. 15, 2013 Unsecured Debt [Member] 7.875% Notes [Member]	Mar. 01, 2013 Unsecured Debt [Member] 7.875% Notes [Member]	Dec. 31, 2012 Unsecured Debt [Member] 7.875% Notes [Member]	Mar. 31, 2013 Unsecured Debt [Member] 7.75% Notes [Member]	Dec. 31, 2012 Unsecured Debt [Member] 7.75% Notes [Member]	Mar. 31, 2013 Unsecured Debt [Member] 6.625% Notes [Member]	Dec. 31, 2012 Unsecured Debt [Member] 6.625% Notes [Member]	Mar. 31, 2013 Unsecured Debt [Member] 6.25% Notes [Member]	Dec. 31, 2012 Unsecured Debt [Member] 6.25% Notes [Member]	Mar. 31, 2013 Foreign Credit Facilities [Member]	Dec. 31, 2012 Foreign Credit Facilities [Member]	Mar. 31, 2013 Capital Lease Obligations [Member]	Dec. 31, 2012 Capital Lease Obligations [Member]	Mar. 31, 2013 Class C [Member] Revolving Credit Facility [Member]	Mar. 20, 2013 Class C [Member] Revolving Credit Facility [Member]	Mar. 31, 2013 Class D [Member] Revolving Credit Facility [Member]	Mar. 31, 2013 Debt Repurchase [Member] Unsecured Debt [Member] 7.875% Notes [Member]	Mar. 31, 2013 Debt Redemption [Member] Unsecured Debt [Member] 7.875% Notes [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding				$ 0	$ 0													$ 77.0	$ 61.0
Debt Instrument, Make-whole Premium								3.3
Notes payable						337.6	337.5	0		300.0	300.0	200.0	200.0	550.0	550.0	400.0	0
Capital Lease Obligations																				5.6	5.6
Long-term debt	1,570.2		1,454.1
Debt Instrument, Interest Rate, Stated Percentage						9.25%		7.875%				7.75%		6.625%		6.25%
Debt Instrument, Decrease, Repayments								300.0
Debt Instrument, Repurchased Face Amount										172.6
Debt Instrument, Redemption Amount									127.4
Payments of Debt Issuance Costs	6.2	0
Line of credit facility, maximum borrowing capacity																							72.8	365.0
Line of credit facility, remaining borrowing capacity				342.1
Line of credit facility, standby letters of credit issued against the facility				22.9
Debt Instrument, Unused Borrowing Capacity, Amount																		13.6
Long-term debt, weighted average interest rate	7.50%		7.90%
Debt Instrument, Tender Premium								5.2
Debt Instrument, Tender Offer, Fees								0.2
Other expense - Debt refinancing and redemption costs	$ 11.3	$ 0																				$ 0.5			$ 1.2	$ 0.9

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Organization and Basis of Presentation

3 Months Ended

Mar. 31, 2013

Organization and Basis of Presentation [Abstract]

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

1. ORGANIZATION AND BASIS OF PRESENTATION

Organization American Axle & Manufacturing Holdings, Inc. (Holdings) and its subsidiaries (collectively, we, our, us or AAM) is a Tier I supplier to the automotive industry. We manufacture, engineer, design and validate driveline and drivetrain systems and related components and chassis modules for light trucks, sport utility vehicles (SUVs), passenger cars, crossover vehicles and commercial vehicles. Driveline and drivetrain systems include components that transfer power from the transmission and deliver it to the drive wheels. Our driveline, drivetrain and related products include axles, chassis modules, driveshafts, power transfer units, transfer cases, chassis and steering components, driveheads, transmission parts and metal-formed products. In addition to locations in the United States (U.S.) (Michigan, Ohio, Indiana and Pennsylvania), we also have offices or facilities in Brazil, China, Germany, India, Japan, Luxembourg, Mexico, Poland, Scotland, South Korea, Sweden and Thailand.

Basis of PresentationWe 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, 2012 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.  Actual results could differ from those estimates.

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, 2012.

Effect of New Accounting Standards On January 1, 2013, new accounting guidance regarding impairment testing of indefinite-lived intangible assets became effective. Under the new guidance, an entity testing an indefinite-lived intangible asset for impairment has the option of performing a qualitative impairment assessment before calculating the fair value of the asset. We do not believe that the adoption of this new accounting guidance will have a significant effect on our impairment assessments of indefinite-lived intangible assets in the future.

On February 5, 2013, new accounting guidance was issued which requires entities to disclose additional information about items reclassified out of accumulated other comprehensive income (AOCI). The new guidance requires entities to disclose, either on the face of the financial statements or as a separate footnote to the financial statements, additional information regarding changes in AOCI balances by component, either before tax or net-of-tax, and requires entities to disclose significant items reclassified out of AOCI by component. The new guidance does not change the current accounting guidance which states that a total for comprehensive income must be reported in condensed interim financial statements in either a single continuous statement or two separate but consecutive statements. Other than additional disclosure requirements, the adoption of this new guidance has had no impact on our condensed consolidated financial statements.

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Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other cash equivalents, at carrying value	$ 4.9	$ 6.5
Portion at Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, fair value disclosure	4.9	6.5
Other Current Assets [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]
Foreign currency contract, asset, fair value disclosure	2.8	2.3
Other Current Assets [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]
Foreign currency contract, asset, fair value disclosure	$ 2.8	$ 2.3

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Supplemental Guarantor Condensed Consolidating Statements of Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Ownership in Subsidiary, Percentage	100.00%
Net sales
External	$ 755.6	$ 751.5
Intercompany	0	0
Total net sales	755.6	751.5
Cost of goods sold	651.3	612.3
Gross profit	104.3	139.2
Selling, general and administrative expenses	59.6	61.8
Operating income	44.7	77.4
Non-operating income (expense), net	(39.8)	(24.9)
Income (loss) before income taxes	4.9	52.5
Income tax expense (benefit)	(2.4)	2.2
Earnings (loss) from equity in subsidiaries	0	0
Net income before royalties and dividends	7.3	50.3
Royalties and dividends	0	0
Net income after royalties and dividends	7.3	50.3
Net loss attributable to noncontrolling interests	0	0.9
Net income attributable to AAM	7.3	51.2
Other comprehensive income (loss), net of tax	4.3	2.3
Foreign currency translation adjustments attributable to noncontrolling interests	0	0.2
Comprehensive income attributable to AAM	11.6	53.3
Holdings [Member]
Net sales
External	0	0
Intercompany	0	0
Total net sales	0	0
Cost of goods sold	0	0
Gross profit	0	0
Selling, general and administrative expenses	0	0
Operating income	0	0
Non-operating income (expense), net	0	0
Income (loss) before income taxes	0	0
Income tax expense (benefit)	0	0
Earnings (loss) from equity in subsidiaries	7.3	51.2
Net income before royalties and dividends	7.3	51.2
Royalties and dividends	0	0
Net income after royalties and dividends	7.3	51.2
Net loss attributable to noncontrolling interests	0	0
Net income attributable to AAM	7.3	51.2
Other comprehensive income (loss), net of tax	4.3	0
Foreign currency translation adjustments attributable to noncontrolling interests		0
Comprehensive income attributable to AAM	11.6	51.2
AAM Inc. [Member]
Net sales
External	200.3	198.3
Intercompany	3.4	7.6
Total net sales	203.7	205.9
Cost of goods sold	198.5	174.0
Gross profit	5.2	31.9
Selling, general and administrative expenses	48.9	51.7
Operating income	(43.7)	(19.8)
Non-operating income (expense), net	(41.5)	(24.3)
Income (loss) before income taxes	(85.2)	(44.1)
Income tax expense (benefit)	(1.6)	(0.9)
Earnings (loss) from equity in subsidiaries	40.4	47.3
Net income before royalties and dividends	(43.2)	4.1
Royalties and dividends	50.5	47.1
Net income after royalties and dividends	7.3	51.2
Net loss attributable to noncontrolling interests	0	0
Net income attributable to AAM	7.3	51.2
Other comprehensive income (loss), net of tax	4.3	(14.4)
Foreign currency translation adjustments attributable to noncontrolling interests		0
Comprehensive income attributable to AAM	11.6	36.8
Guarantor Subsidiaries [Member]
Net sales
External	53.9	54.5
Intercompany	57.6	60.7
Total net sales	111.5	115.2
Cost of goods sold	97.2	99.9
Gross profit	14.3	15.3
Selling, general and administrative expenses	0	0
Operating income	14.3	15.3
Non-operating income (expense), net	2.7	0.8
Income (loss) before income taxes	17.0	16.1
Income tax expense (benefit)	0	0
Earnings (loss) from equity in subsidiaries	(3.2)	(13.5)
Net income before royalties and dividends	13.8	2.6
Royalties and dividends	0	0
Net income after royalties and dividends	13.8	2.6
Net loss attributable to noncontrolling interests	0	0
Net income attributable to AAM	13.8	2.6
Other comprehensive income (loss), net of tax	7.7	1.7
Foreign currency translation adjustments attributable to noncontrolling interests		0
Comprehensive income attributable to AAM	21.5	4.3
Non-Guarantor Subsidiaries [Member]
Net sales
External	501.4	498.7
Intercompany	4.9	5.8
Total net sales	506.3	504.5
Cost of goods sold	421.5	412.5
Gross profit	84.8	92.0
Selling, general and administrative expenses	10.7	10.1
Operating income	74.1	81.9
Non-operating income (expense), net	(1.0)	(1.4)
Income (loss) before income taxes	73.1	80.5
Income tax expense (benefit)	(0.8)	3.1
Earnings (loss) from equity in subsidiaries	0	0
Net income before royalties and dividends	73.9	77.4
Royalties and dividends	(50.5)	(47.1)
Net income after royalties and dividends	23.4	30.3
Net loss attributable to noncontrolling interests	0	0.9
Net income attributable to AAM	23.4	31.2
Other comprehensive income (loss), net of tax	8.3	15.0
Foreign currency translation adjustments attributable to noncontrolling interests		0.2
Comprehensive income attributable to AAM	31.7	46.0
Elims [Member]
Net sales
External	0	0
Intercompany	(65.9)	(74.1)
Total net sales	(65.9)	(74.1)
Cost of goods sold	(65.9)	(74.1)
Gross profit	0	0
Selling, general and administrative expenses	0	0
Operating income	0	0
Non-operating income (expense), net	0	0
Income (loss) before income taxes	0	0
Income tax expense (benefit)	0	0
Earnings (loss) from equity in subsidiaries	(44.5)	(85.0)
Net income before royalties and dividends	(44.5)	(85.0)
Royalties and dividends	0	0
Net income after royalties and dividends	(44.5)	(85.0)
Net loss attributable to noncontrolling interests	0	0
Net income attributable to AAM	(44.5)	(85.0)
Other comprehensive income (loss), net of tax	(20.3)	0
Foreign currency translation adjustments attributable to noncontrolling interests		0
Comprehensive income attributable to AAM	$ (64.8)	$ (85.0)

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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net sales	$ 755.6	$ 751.5
Cost of goods sold	651.3	612.3
Gross profit	104.3	139.2
Selling, general and administrative expenses	59.6	61.8
Operating income	44.7	77.4
Interest expense	(29.1)	(24.0)
Investment income	0.1	0.3
Other income (expense)
Debt refinancing and redemption costs	(11.3)	0
Other, net	0.5	(1.2)
Income before income taxes	4.9	52.5
Income tax expense (benefit)	(2.4)	2.2
Net income	7.3	50.3
Net loss attributable to noncontrolling interests	0	0.9
Net income attributable to AAM	$ 7.3	$ 51.2
Basic earnings per share	$ 0.10	$ 0.68
Diluted earnings per share	$ 0.10	$ 0.68

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CONDENSED CONSOLIDATED BALANCE SHEETS PARENTHETICAL (USD $) In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Treasury Stock, Shares	6.0	6.0

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Employee Benefit Plans Components of Net Periodic Benefit Cost (Credit) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Impact on accumulated other comprehensive loss due to curtailment gain		$ 21.8
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.9	0.8
Interest cost	8.5	8.8
Expected asset return	(11.5)	(8.0)
Amortized loss	2.4	1.8
Amortized prior service credit	0.3	0
Net periodic benefit cost (credit)	0.6	3.4
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.1	0.1
Interest cost	3.3	3.9
Amortized loss	0.2	0.2
Amortized prior service credit	(0.4)	(0.5)
Curtailment gain	0	(21.8)
Defined benefit plan, estimated future employer contributions in current fiscal year	15
Other Postretirement Benefit Expense	$ 3.2	$ (18.1)

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Fair Value (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

Financial instruments   The estimated fair values of our financial assets and liabilities that are recognized at fair value on a recurring basis, using available market information and other observable data, as of March 31, 2013, are as follows:

	March 31, 2013				December 31, 2012
	Carrying Amount		Fair Value		Carrying Amount		Fair Value		Input
	(in millions)				(in millions)
Balance Sheet Classification
Cash equivalents	$	4.9	$	4.9	$	6.5	$	6.5	Level 1
Prepaid expenses and other current     assets
Currency forward contracts	2.8		2.8		2.3		2.3		Level 2

Fair Value, Liabilities Measured on Recurring Basis [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:

	March 31, 2013				December 31, 2012
	Carrying  Amount		Fair Value		Carrying  Amount		Fair Value		Input
	(in millions)				(in millions)
Revolving Credit Facility	$	—	$	—	$	—	$	—	Level 2
9.25% Notes	337.6		373.2		337.5		377.4		Level 2
7.875% Notes	—		—		300.0		310.1		Level 2
7.75% Notes	200.0		219.7		200.0		216.5		Level 2
6.625% Notes	550.0		565.8		550.0		555.5		Level 2
6.25% Notes	400.0		408.5		—		—		Level 2

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Product Warranties (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Product Warranty Rollforward
Beginning balance	$ 29.1	$ 13.4
Accruals	3.2	3.6
Settlements	(9.2)	(0.2)
Adjustments to prior period accruals	(0.2)	(0.1)
Foreign currency translation and other	0	0.1
Ending balance	$ 22.9	$ 16.8

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Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

Employee Benefit Plans [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

The components of net periodic benefit cost (credit) are as follows:

	Pension Benefits
	Three Months Ended
	March 31,
	2013			2012
	(in millions)
Service cost	$	0.9		$	0.8
Interest cost	8.5			8.8
Expected asset return	(11.5		)	(8.0		)
Amortized loss	2.4			1.8
Amortized prior service cost	0.3			—
Net periodic benefit cost	$	0.6		$	3.4
	Other Postretirement Benefits
	Three Months Ended
	March 31,
	2013			2012
	(in millions)
Service cost	$	0.1		$	0.1
Interest cost	3.3			3.9
Amortized loss	0.2			0.2
Amortized prior service credit	(0.4		)	(0.5		)
Curtailment gain	—			(21.8		)
Net periodic benefit cost (credit)	$	3.2		$	(18.1	)

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities
Net income	$ 7.3	$ 50.3
Adjustments to reconcile net income to net cash used in operating activities
Depreciation and amortization	41.3	36.7
Deferred income taxes	(2.6)	(0.5)
Stock-based compensation	1.3	0.4
Pensions and other postretirement benefits, net of contributions	1.0	(16.7)
Loss on disposal of property, plant and equipment, net	0.2	0.6
Debt refinancing and redemption costs	2.6	0
Changes in operating assets and liabilities
Accounts receivable	(70.7)	(166.3)
Inventories	(15.5)	(24.7)
Accounts payable and accrued expenses	29.0	73.0
Deferred revenue	(5.0)	(13.3)
Other assets and liabilities	(15.7)	(11.0)
Net cash used in operating activities	(26.8)	(71.5)
Investing activities
Purchases of property, plant and equipment	(47.9)	(44.5)
Proceeds from sale of property, plant and equipment	0.1	0.9
Proceeds from sale-leaseback of equipment	3.9	0
Net cash used in investing activities	(43.9)	(43.6)
Financing Activities
Net short-term borrowings under credit facilities	11.3	59.1
Payments of long-term debt and capital lease obligations	(301.8)	(2.4)
Proceeds from issuance of long-term debt	405.2	10.1
Debt issuance costs	(6.2)	0
Purchase of noncontrolling interest	0	(4.0)
Purchase of treasury stock	0	(5.9)
Employee stock option exercises	0	0.1
Net cash provided by financing activities	108.5	57.0
Effect of exchange rate changes on cash	0.6	1.7
Net increase (decrease) in cash and cash equivalents	38.4	(56.4)
Cash and cash equivalents at beginning of period	62.4	169.2
Cash and cash equivalents at end of period	100.8	112.8
Supplemental cash flow information
Interest paid	27.2	35.3
Income taxes paid, net of refunds	$ 2.1	$ 5.2

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income	$ 7.3	$ 50.3
Other comprehensive income (loss), net of tax
Defined benefit plans, net of $0.7 million of tax in 2013	(1.1)	(14.0)
Foreign currency translation adjustments	4.9	10.7
Change in derivatives	0.5	5.6
Other comprehensive income	4.3	2.3
Comprehensive income	11.6	52.6
Net loss attributable to noncontrolling interests	0	0.9
Foreign currency translation adjustments attributable to noncontrolling interests	0	0.2
Comprehensive income attributable to AAM	$ 11.6	$ 53.3

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Earnings Per Share (EPS)

3 Months Ended

Mar. 31, 2013

Earnings (Loss) per Share (EPS) [Abstract]

Earnings Per Share [Text Block]

10. EARNINGS PER SHARE (EPS)

 The following table sets forth the computation of our basic and diluted EPS:

	Three Months Ended
	March 31,
	2013		2012
	(in millions, except per share data)
Numerator
Net income attributable to AAM	$	7.3	$	51.2
Denominator
Basic shares outstanding -
Weighted-average shares outstanding	76.2		75.0
Effect of dilutive securities
Dilutive stock-based compensation	—		—
Diluted shares outstanding -
Adjusted weighted-average shares after assumed conversions	76.2		75.0
Basic EPS	$	0.10	$	0.68
Diluted EPS	$	0.10	$	0.68

Certain exercisable stock options were excluded in the computations of diluted EPS because the exercise price of these options was greater than the average period market prices. The number of stock options outstanding, which were not included in the calculation of diluted EPS, was 2.3 million at March 31, 2013 and 3.3 million at March 31, 2012. The ranges of exercise prices related to the excluded exercisable stock options were $15.58 - $40.83 at March 31, 2013 and March 31, 2012.

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Document and Entity Information Document (USD $)	3 Months Ended
	Mar. 31, 2013	May 01, 2013	Jun. 30, 2012
Entity Registrant Name	AMERICAN AXLE & MANUFACTURING HOLDINGS INC
Entity Central Index Key	0001062231
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Document Period End Date	Mar. 31, 2013
Amendment Flag	false
Document Type	10-Q
Entity Well-known Seasoned Issuer	Yes
Entity Public Float			$ 718,696,092
Entity Common Stock, Shares Outstanding		74,839,567
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No

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Reclassifications out of Accumulated Other Comprehensive Income (Loss)

3 Months Ended

Mar. 31, 2013

Disclosure of Reclassification Amount [Text Block]

11. RECLASSIFICATIONS OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

Reclassification adjustments and other activity impacting accumulated other comprehensive income (loss) during the three months ended March 31, 2013 are as follows (in millions):

	Defined Benefit Plans			Foreign Currency Translation Adjustments		Unrecognized Gain on Derivatives			Total
Balance at December 31, 2012	$	(274.5	)	$	7.6	$	2.3		$	(264.6	)
Other comprehensive income (loss) before reclassifications	(3.6		)	4.9		1.7			3.0
Amounts reclassified from accumulated other comprehensive income (loss) (Recorded in cost of goods sold)	2.5			—		(1.2		)	1.3
Net current period other comprehensive income (loss)	(1.1		)	4.9		0.5			4.3
Balance at March 31, 2013	$	(275.6	)	$	12.5	$	2.8		$	(260.3	)

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME PARENTHETICAL (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax	$ 0.7

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Fair Value

3 Months Ended

Mar. 31, 2013

Fair Value [Abstract]

Fair Value Disclosures [Text Block]

5. FAIR VALUE

The fair value accounting guidance 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 fair values of our financial assets and liabilities that are recognized at fair value on a recurring basis, using available market information and other observable data, as of March 31, 2013, are as follows:

	March 31, 2013				December 31, 2012
	Carrying Amount		Fair Value		Carrying Amount		Fair Value		Input
	(in millions)				(in millions)
Balance Sheet Classification
Cash equivalents	$	4.9	$	4.9	$	6.5	$	6.5	Level 1
Prepaid expenses and other current     assets
Currency forward contracts	2.8		2.8		2.3		2.3		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 estimated the fair value of the amounts outstanding on our debt using available market information and other observable data, to be as follows:

	March 31, 2013				December 31, 2012
	Carrying  Amount		Fair Value		Carrying  Amount		Fair Value		Input
	(in millions)				(in millions)
Revolving Credit Facility	$	—	$	—	$	—	$	—	Level 2
9.25% Notes	337.6		373.2		337.5		377.4		Level 2
7.875% Notes	—		—		300.0		310.1		Level 2
7.75% Notes	200.0		219.7		200.0		216.5		Level 2
6.625% Notes	550.0		565.8		550.0		555.5		Level 2
6.25% Notes	400.0		408.5		—		—		Level 2

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Long-Term Debt

3 Months Ended

Mar. 31, 2013

Long-term Debt, Unclassified [Abstract]

Long-term Debt [Text Block]

4. LONG-TERM DEBT

Long-term debt consists of the following:

	March 31, 2013		December 31, 2012
	(in millions)
Revolving credit facility	$	—	$	—
9.25% Notes, net of discount	337.6		337.5
7.875% Notes	—		300.0
7.75% Notes	200.0		200.0
6.625% Notes	550.0		550.0
6.25% Notes	400.0		—
Foreign credit facilities	77.0		61.0
Capital lease obligations	5.6		5.6
Long-term debt	$	1,570.2	$	1,454.1

6.25% Notes In the first quarter of 2013, we issued $400.0 million of 6.25% senior unsecured notes due 2021 (6.25% Notes). Concurrent with the offering of the 6.25% Notes, we made a tender offer to purchase our 7.875% Notes, of which the aggregate principal amount outstanding at the time of the tender offer was $300.0 million. Net proceeds from the 6.25% Notes were used to fund the purchase pursuant to the tender offer and the subsequent redemption of the entire $300.0 million of the 7.875% Notes and for other general corporate purposes. We paid debt issuance costs of $6.2 million in the first quarter of 2013 related to the 6.25% Notes.

7.875% Notes On March 1, 2013, in connection with the cash tender offer, we purchased $172.6 million aggregate principal amount of the 7.875% Notes, and paid accrued interest. Upon purchase, we expensed $5.2 million related to a tender premium, $0.2 million of professional fees and unamortized debt issuance costs of $1.2 million related to this debt. We had been amortizing the debt issuance costs over the expected life of the borrowing.

On March 15, 2013, we voluntarily redeemed the remaining 7.875% Notes outstanding. This resulted in a principal payment of $127.4 million, a payment of $3.3 million related to a redemption premium, as well as payment of accrued interest. Upon redemption, we expensed $0.9 million of unamortized debt issuance costs related to this debt. We had been amortizing the debt issuance costs over the expected life of the borrowing.

Revolving Credit Facility On March 20, 2013, we terminated our class C loan facility of $72.8 million, which would have matured on June 30, 2013. Upon termination, we expensed $0.5 million of unamortized debt issuance costs related to the class C facility. We had been amortizing the debt issuance costs over the expected life of the borrowing. As of March 31, 2013, the Revolving Credit Facility provided up to $365.0 million of revolving bank financing commitments through June 30, 2016.  At March 31, 2013, we had $342.1 million available under the Revolving Credit Facility.  This availability reflects a reduction of $22.9 million for standby letters of credit issued against the facility.

The Revolving Credit Facility provides back-up liquidity for our foreign credit facilities.  We intend to use the availability of long-term financing under the Revolving Credit Facility to refinance any current maturities related to such debt agreements that are not otherwise refinanced on a long-term basis in their local markets.

We utilize local currency credit facilities to finance the operations of certain foreign subsidiaries.  At March 31, 2013, $77.0 million was outstanding under these facilities and an additional $13.6 million was available.

The weighted-average interest rate of our long-term debt outstanding was 7.5% at March 31, 2013 and 7.9% at December 31, 2012.

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Derivatives (Tables)

3 Months Ended

Mar. 31, 2013

Derivatives and Risk Management [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 into net income from accumulated other comprehensive income (loss):

	Location of	Gain (Loss) Reclassified During					Gain Expected to
	Gain (Loss)	Three Months Ended					be Reclassified
	Reclassified into	March 31,					During the
	Net Income	2013		2012			Next 12 Months
		(in millions)
Currency forward contracts	Cost of goods sold	$	1.2	$	(0.2	)	$	2.8

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Supplemental Guarantor Condensed Consolidating Financial Statements

3 Months Ended

Mar. 31, 2013

Supplemental Guarantor Condensed Consolidating Financial Statements [Abstract]

Supplemental Guarantor Disclosure [Text Block]

12. SUPPLEMENTAL GUARANTOR CONDENSED CONSOLIDATING FINANCIAL STATEMENTS

Holdings has no significant assets other than its 100% ownership in AAM, Inc. and no direct subsidiaries other than AAM, Inc.  The 9.25% Notes are senior secured obligations of AAM Inc. and the 7.75% Notes, 6.625% Notes and 6.25% Notes are senior unsecured obligations of AAM Inc.; all of which are fully and unconditionally and joint and severally, guaranteed by Holdings and substantially all domestic subsidiaries of AAM, Inc.

These Condensed Consolidating Financial Statements are prepared under the equity method of accounting whereby the investments in subsidiaries are recorded at cost and adjusted for the parent’s share of the subsidiaries’ cumulative results of operations, capital contributions and distributions, and other equity changes.

Condensed Consolidating Statements of Income
Three Months Ended March 31,
(in millions)
	Holdings		AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Elims			Consolidated
2013
Net sales
External	$	—	$	200.3		$	53.9		$	501.4		$	—		$	755.6
Intercompany	—		3.4			57.6			4.9			(65.9		)	—
Total net sales	—		203.7			111.5			506.3			(65.9		)	755.6
Cost of goods sold	—		198.5			97.2			421.5			(65.9		)	651.3
Gross profit	—		5.2			14.3			84.8			—			104.3
Selling, general and administrative expenses	—		48.9			—			10.7			—			59.6
Operating income (loss)	—		(43.7		)	14.3			74.1			—			44.7
Non-operating income (expense), net	—		(41.5		)	2.7			(1.0		)	—			(39.8		)
Income (loss) before income taxes	—		(85.2		)	17.0			73.1			—			4.9
Income tax benefit	—		(1.6		)	—			(0.8		)	—			(2.4		)
Earnings (loss) from equity in subsidiaries	7.3		40.4			(3.2		)	—			(44.5		)	—
Net income (loss) before royalties and dividends	7.3		(43.2		)	13.8			73.9			(44.5		)	7.3
Royalties and dividends	—		50.5			—			(50.5		)	—			—
Net income after royalties and dividends	7.3		7.3			13.8			23.4			(44.5		)	7.3
Net loss attributable to noncontrolling interests	—		—			—			—			—			—
Net income attributable to AAM	$	7.3	$	7.3		$	13.8		$	23.4		$	(44.5	)	$	7.3
Other comprehensive income	4.3		4.3			7.7			8.3			(20.3		)	4.3
Comprehensive income attributable to AAM	$	11.6	$	11.6		$	21.5		$	31.7		$	(64.8	)	$	11.6

	Holdings		AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Elims			Consolidated
2012
Net sales
External	$	—	$	198.3		$	54.5		$	498.7		$	—		$	751.5
Intercompany	—		7.6			60.7			5.8			(74.1		)	—
Total net sales	—		205.9			115.2			504.5			(74.1		)	751.5
Cost of goods sold	—		174.0			99.9			412.5			(74.1		)	612.3
Gross profit	—		31.9			15.3			92.0			—			139.2
Selling, general and administrative expenses	—		51.7			—			10.1			—			61.8
Operating income (loss)	—		(19.8		)	15.3			81.9			—			77.4
Non-operating income (expense), net	—		(24.3		)	0.8			(1.4		)	—			(24.9		)
Income (loss) before income taxes	—		(44.1		)	16.1			80.5			—			52.5
Income tax expense (benefit)	—		(0.9		)	—			3.1			—			2.2
Earnings (loss) from equity in subsidiaries	51.2		47.3			(13.5		)	—			(85.0		)	—
Net income before royalties and dividends	51.2		4.1			2.6			77.4			(85.0		)	50.3
Royalties and dividends	—		47.1			—			(47.1		)	—			—
Net income after royalties and dividends	51.2		51.2			2.6			30.3			(85.0		)	50.3
Net loss attributable to noncontrolling interests	—		—			—			0.9			—			0.9
Net income attributable to AAM	$	51.2	$	51.2		$	2.6		$	31.2		$	(85.0	)	$	51.2
Other comprehensive income (loss)	—		(14.4		)	1.7			15.0			—			2.3
Foreign currency translation adjustments attributable to noncontrolling interests	—		—			—			0.2			—			0.2
Comprehensive income attributable to AAM	$	51.2	$	36.8		$	4.3		$	46.0		$	(85.0	)	$	53.3

Condensed Consolidating Balance Sheets
(in millions)
	Holdings			AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Elims			Consolidated
March 31, 2013
Assets
Current assets
Cash and cash equivalents	$	—		$	29.3		$	—		$	71.5	$	—		$	100.8
Accounts receivable, net	—			124.9			31.7			378.7		—			535.3
Inventories, net	—			46.0			32.1			162.5		—			240.6
Other current assets	—			48.7			3.8			75.9		—			128.4
Total current assets	—			248.9			67.6			688.6		—			1,005.1
Property, plant and equipment, net	—			259.3			82.1			702.1		—			1,043.5
Goodwill	—			—			147.8			8.6		—			156.4
Other assets and deferred charges	—			702.8			42.3			79.5		—			824.6
Investment in subsidiaries	215.8			1,142.3			2.5			—		(1,360.6		)	—
Total assets	$	215.8		$	2,353.3		$	342.3		$	1,478.8	$	(1,360.6	)	$	3,029.6
Liabilities and stockholders’ equity (deficit)
Current liabilities
Accounts payable	$	—		$	119.5		$	43.4		$	291.7	$	—		$	454.6
Other current liabilities	—			109.4			4.2			82.9		—			196.5
Total current liabilities	—			228.9			47.6			374.6		—			651.1
Intercompany payable (receivable)	323.7			(434.2		)	(201.1		)	311.6		—			—
Long-term debt	—			1,487.6			5.6			77.0		—			1,570.2
Other long-term liabilities	—			855.2			1.3			59.7		—			916.2
Total liabilities	323.7			2,137.5			(146.6		)	822.9		—			3,137.5
Total AAM Stockholders’ equity (deficit)	(107.9		)	215.8			488.9			655.9		(1,360.6		)	(107.9		)
Noncontrolling interest in subsidiaries	—			—			—			—		—			—
Total stockholders’ equity (deficit)	(107.9		)	215.8			488.9			655.9		(1,360.6		)	(107.9		)
Total liabilities and stockholders’ equity (deficit)	$	215.8		$	2,353.3		$	342.3		$	1,478.8	$	(1,360.6	)	$	3,029.6

	Holdings			AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Elims			Consolidated
December 31, 2012
Assets
Current assets
Cash and cash equivalents	$	—		$	10.6		$	—		$	51.8	$	—		$	62.4
Accounts receivable, net	—			94.4			25.3			343.7		—			463.4
Inventories, net	—			48.7			31.6			144.0		—			224.3
Other current assets	—			48.8			3.5			69.7		—			122.0
Total current assets	—			202.5			60.4			609.2		—			872.1
Property, plant and equipment, net	—			250.4			84.2			675.1		—			1,009.7
Goodwill	—			—			147.8			8.6		—			156.4
Other assets and deferred charges	—			706.1			40.0			81.7		—			827.8
Investment in subsidiaries	202.9			1,094.6			—			—		(1,297.5		)	—
Total assets	$	202.9		$	2,253.6		$	332.4		$	1,374.6	$	(1,297.5	)	$	2,866.0
Liabilities and stockholders’ equity (deficit)
Current liabilities
Accounts payable	$	—		$	91.4		$	37.3		$	267.4	$	—		$	396.1
Other current liabilities	—			124.5			3.8			76.4		—			204.7
Total current liabilities	—			215.9			41.1			343.8		—			600.8
Intercompany payable (receivable)	323.7			(420.6		)	(188.7		)	285.6		—			—
Long-term debt	—			1,387.5			5.6			61.0		—			1,454.1
Investment in subsidiaries obligation	—			—			7.6			—		(7.6		)	—
Other long-term liabilities	—			867.9			1.2			62.8		—			931.9
Total liabilities	323.7			2,050.7			(133.2		)	753.2		(7.6		)	2,986.8
Total AAM Stockholders’ equity (deficit)	(120.8		)	202.9			465.6			621.4		(1,289.9		)	(120.8		)
Noncontrolling interest in subsidiaries	—			—			—			—		—			—
Total stockholders’ equity (deficit)	(120.8		)	202.9			465.6			621.4		(1,289.9		)	(120.8		)
Total liabilities and stockholders’ equity (deficit)	$	202.9		$	2,253.6		$	332.4		$	1,374.6	$	(1,297.5	)	$	2,866.0

Condensed Consolidating Statements of Cash Flows
Three months ended March 31, (in millions)
	Holdings		AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Elims		Consolidated
2013
Net cash provided by (used in) operating activities	$	—	$	(42.1	)	$	(2.0	)	$	17.3		$	—	$	(26.8	)
Investing activities
Purchases of property, plant and equipment	—		(13.3		)	(2.2		)	(32.4		)	—		(47.9		)
Proceeds from sale of equipment	—		0.1			—			—			—		0.1
Proceeds from sale-leaseback of equipment	—		3.9			—			—			—		3.9
Net cash used in investing activities	—		(9.3		)	(2.2		)	(32.4		)	—		(43.9		)
Financing activities
Net debt activity	—		99.0			(0.1		)	15.8			—		114.7
Intercompany activity	—		(22.7		)	4.3			18.4			—		—
Debt issuance costs	—		(6.2		)	—			—			—		(6.2		)
Net cash provided by financing activities	—		70.1			4.2			34.2			—		108.5
Effect of exchange rate changes on cash	—		—			—			0.6			—		0.6
Net increase in cash and cash equivalents	—		18.7			—			19.7			—		38.4
Cash and cash equivalents at beginning of period	—		10.6			—			51.8			—		62.4
Cash and cash equivalents at end of period	$	—	$	29.3		$	—		$	71.5		$	—	$	100.8

	Holdings			AAM Inc.			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Elims		Consolidated
2012
Net cash provided by (used in) operating activities	$	—		$	(73.8	)	$	7.5		$	(5.2	)	$	—	$	(71.5	)
Investing activities
Purchases of property, plant and equipment	—			(14.7		)	(1.4		)	(28.4		)	—		(44.5		)
Proceeds from sale of equipment	—			0.1			—			0.8			—		0.9
Net cash used in investing activities	—			(14.6		)	(1.4		)	(27.6		)	—		(43.6		)
Financing activities
Net debt activity	—			59.1			(0.1		)	7.8			—		66.8
Intercompany activity	5.9			(24.3		)	(6.0		)	24.4			—		—
Employee stock option exercises	—			0.1			—			—			—		0.1
Purchase of noncontrolling interest	—			—			—			(4.0		)	—		(4.0		)
Purchase of treasury stock	(5.9		)	—			—			—			—		(5.9		)
Net cash provided by (used in) financing activities	—			34.9			(6.1		)	28.2			—		57.0
Effect of exchange rate changes on cash	—			—			—			1.7			—		1.7
Net decrease in cash and cash equivalents	—			(53.5		)	—			(2.9		)	—		(56.4		)
Cash and cash equivalents at beginning of period	—			83.7			—			85.5			—		169.2
Cash and cash equivalents at end of period	$	—		$	30.2		$	—		$	82.6		$	—	$	112.8

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Product Warranties

3 Months Ended

Mar. 31, 2013

Commitments and Contingencies [Abstract]

Product Warranty Disclosure [Text Block]

8. PRODUCT WARRANTIES

We record a liability for estimated warranty obligations at the dates our product 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 adjust the liability as necessary.

The following table provides a reconciliation of changes in the product warranty liability:

	Three Months Ended
	March 31,
	2013			2012
	(in millions)
Beginning balance	$	29.1		$	13.4
Accruals	3.2			3.6
Settlements	(9.2		)	(0.2		)
Adjustment to prior period accruals	(0.2		)	(0.1		)
Foreign currency translation and other	—			0.1
Ending balance	$	22.9		$	16.8

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Derivatives

3 Months Ended

Mar. 31, 2013

Derivatives [Abstract]

Derivative Instruments and Hedging Activities Disclosure [Text Block]

6. DERIVATIVES

Our business and financial results are affected by fluctuations in world 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 forward contracts  From time to time, we use foreign currency forward contracts to reduce the effects of fluctuations in exchange rates, primarily relating to the Mexican Peso, Euro and Pound Sterling.  As of March 31, 2013, we have currency forward contracts outstanding with a notional amount of $26.8 million that hedge our exposure to changes in foreign currency exchange rates for our payroll expenses.  

The following table summarizes the reclassification of pre-tax derivative gains into net income from accumulated other comprehensive income (loss):

	Location of	Gain (Loss) Reclassified During					Gain Expected to
	Gain (Loss)	Three Months Ended					be Reclassified
	Reclassified into	March 31,					During the
	Net Income	2013		2012			Next 12 Months
		(in millions)
Currency forward contracts	Cost of goods sold	$	1.2	$	(0.2	)	$	2.8

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Employee Benefit Plans

3 Months Ended

Mar. 31, 2013

Employee Benefit Plans [Abstract]

Pension and Other Postretirement Benefits Disclosure [Text Block]

7. EMPLOYEE BENEFIT PLANS

The components of net periodic benefit cost (credit) are as follows:

	Pension Benefits
	Three Months Ended
	March 31,
	2013			2012
	(in millions)
Service cost	$	0.9		$	0.8
Interest cost	8.5			8.8
Expected asset return	(11.5		)	(8.0		)
Amortized loss	2.4			1.8
Amortized prior service cost	0.3			—
Net periodic benefit cost	$	0.6		$	3.4
	Other Postretirement Benefits
	Three Months Ended
	March 31,
	2013			2012
	(in millions)
Service cost	$	0.1		$	0.1
Interest cost	3.3			3.9
Amortized loss	0.2			0.2
Amortized prior service credit	(0.4		)	(0.5		)
Curtailment gain	—			(21.8		)
Net periodic benefit cost (credit)	$	3.2		$	(18.1	)

We recorded a gain of $21.8 million to cost of goods sold for the curtailment of certain other postretirement benefits (OPEB) in the three months ended March 31, 2012. This resulted primarily from the reduction in the expected future OPEB related to the DMC and CKMF hourly associates who terminated employment from AAM as a result of our plant closures. These curtailment gains resulted in an increase in our accumulated other comprehensive loss of $21.8 million.

Due to our significant pension contributions made in 2012, we will not make any cash payments in 2013 to satisfy our regulatory funding requirements. We expect our cash outlay for other postretirement benefit obligations in 2013, net of GM cost sharing, to be approximately $15 million.

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Income Taxes

3 Months Ended

Mar. 31, 2013

Income Taxes [Abstract]

Income Tax Disclosure [Text Block]

9. INCOME TAXES

We are required to adjust our effective tax rate each quarter to estimate our annual effective tax rate. We must also record the tax impact of certain discrete, unusual or infrequently occurring items, including changes in judgment about valuation allowances and effects of changes in tax laws or rates, 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.

Income tax expense (benefit) was a benefit of $2.4 million in the first quarter of 2013 as compared to expense of $2.2 million in the first quarter of 2012.  Our effective income tax rate was negative 48.1% in the first quarter of 2013 as compared to 4.3% in the first quarter of 2012. Our income tax benefit and effective tax rate for the three months ended March 31, 2013 primarily reflect favorable foreign tax rates, along with our inability to realize a tax benefit for current foreign losses. Our income tax benefit and effective tax rate for the three months ended March 31, 2013 also reflect a tax benefit of $1.5 million relating to the release of a prior year unrecognized tax benefit due to the expiration of the applicable statute of limitations and a benefit of $3.3 million relating to an election we made in the first quarter of 2013 regarding the treatment of foreign exchange gains and losses in a foreign jurisdiction.

Our income tax expense and effective tax rate for the three months ended March 31, 2012 primarily reflected recognizing a net operating loss benefit against our taxable income in the U.S., as well as the effect of recognizing a tax benefit of $1.1 million relating to the release of a prior year unrecognized tax benefit for which the statute of limitations had expired and tax expense of $0.7 million relating to foreign withholding taxes paid for which a foreign tax credit could not be realized.

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Derivatives (Details) (Forward Contracts [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount	$ 26.8
Cost of Sales [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments, income statement location of gain (loss) reclassified from accumulated OCI	Cost of goods sold
Derivative instruments, gain (loss) reclassified from accumulated OCI into income, effective portion, net	1.2	(0.2)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			$ 2.8

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Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2013

Long Term Debt and Lease Obligations [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

Long-term debt consists of the following:

	March 31, 2013		December 31, 2012
	(in millions)
Revolving credit facility	$	—	$	—
9.25% Notes, net of discount	337.6		337.5
7.875% Notes	—		300.0
7.75% Notes	200.0		200.0
6.625% Notes	550.0		550.0
6.25% Notes	400.0		—
Foreign credit facilities	77.0		61.0
Capital lease obligations	5.6		5.6
Long-term debt	$	1,570.2	$	1,454.1

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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings (Loss) per Share (EPS) [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:

	Three Months Ended
	March 31,
	2013		2012
	(in millions, except per share data)
Numerator
Net income attributable to AAM	$	7.3	$	51.2
Denominator
Basic shares outstanding -
Weighted-average shares outstanding	76.2		75.0
Effect of dilutive securities
Dilutive stock-based compensation	—		—
Diluted shares outstanding -
Adjusted weighted-average shares after assumed conversions	76.2		75.0
Basic EPS	$	0.10	$	0.68
Diluted EPS	$	0.10	$	0.68

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Supplemental Guarantor Condensed Consolidating Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Current Assets
Cash and cash equivalents	$ 100.8	$ 62.4	$ 112.8	$ 169.2
Accounts receivable, net	535.3	463.4
Inventories, net	240.6	224.3
Other current assets	128.4	122.0
Total current assets	1,005.1	872.1
Property, plant and equipment, net	1,043.5	1,009.7
Goodwill	156.4	156.4
Other assets and deferred charges, condensed	824.6	827.8
Investment in subsidiaries	0	0
Total assets	3,029.6	2,866.0
Current Liabilities
Accounts payable	454.6	396.1
Other current liabilities	196.5	204.7
Total current liabilities	651.1	600.8
Intercompany payable (receivable)	0	0
Long-term debt	1,570.2	1,454.1
Investment in subsidiaries obligation		0
Other long-term liabilities	916.2	931.9
Total liabilities	3,137.5	2,986.8
Total AAM stockholders' deficit	(107.9)	(120.8)
Noncontrolling interest in subsidiaries	0	0
Total stockholders’ deficit	(107.9)	(120.8)
Total liabilities and stockholders' deficit	3,029.6	2,866.0
Holdings [Member]
Current Assets
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories, net	0	0
Other current assets	0	0
Total current assets	0	0
Property, plant and equipment, net	0	0
Goodwill	0	0
Other assets and deferred charges, condensed	0	0
Investment in subsidiaries	215.8	202.9
Total assets	215.8	202.9
Current Liabilities
Accounts payable	0	0
Other current liabilities	0	0
Total current liabilities	0	0
Intercompany payable (receivable)	323.7	323.7
Long-term debt	0	0
Investment in subsidiaries obligation		0
Other long-term liabilities	0	0
Total liabilities	323.7	323.7
Total AAM stockholders' deficit	(107.9)	(120.8)
Noncontrolling interest in subsidiaries	0	0
Total stockholders’ deficit	(107.9)	(120.8)
Total liabilities and stockholders' deficit	215.8	202.9
AAM Inc. [Member]
Current Assets
Cash and cash equivalents	29.3	10.6	30.2	83.7
Accounts receivable, net	124.9	94.4
Inventories, net	46.0	48.7
Other current assets	48.7	48.8
Total current assets	248.9	202.5
Property, plant and equipment, net	259.3	250.4
Goodwill	0	0
Other assets and deferred charges, condensed	702.8	706.1
Investment in subsidiaries	1,142.3	1,094.6
Total assets	2,353.3	2,253.6
Current Liabilities
Accounts payable	119.5	91.4
Other current liabilities	109.4	124.5
Total current liabilities	228.9	215.9
Intercompany payable (receivable)	(434.2)	(420.6)
Long-term debt	1,487.6	1,387.5
Investment in subsidiaries obligation		0
Other long-term liabilities	855.2	867.9
Total liabilities	2,137.5	2,050.7
Total AAM stockholders' deficit	215.8	202.9
Noncontrolling interest in subsidiaries	0	0
Total stockholders’ deficit	215.8	202.9
Total liabilities and stockholders' deficit	2,353.3	2,253.6
Guarantor Subsidiaries [Member]
Current Assets
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	31.7	25.3
Inventories, net	32.1	31.6
Other current assets	3.8	3.5
Total current assets	67.6	60.4
Property, plant and equipment, net	82.1	84.2
Goodwill	147.8	147.8
Other assets and deferred charges, condensed	42.3	40.0
Investment in subsidiaries	2.5	0
Total assets	342.3	332.4
Current Liabilities
Accounts payable	43.4	37.3
Other current liabilities	4.2	3.8
Total current liabilities	47.6	41.1
Intercompany payable (receivable)	(201.1)	(188.7)
Long-term debt	5.6	5.6
Investment in subsidiaries obligation		7.6
Other long-term liabilities	1.3	1.2
Total liabilities	(146.6)	(133.2)
Total AAM stockholders' deficit	488.9	465.6
Noncontrolling interest in subsidiaries	0	0
Total stockholders’ deficit	488.9	465.6
Total liabilities and stockholders' deficit	342.3	332.4
Non-Guarantor Subsidiaries [Member]
Current Assets
Cash and cash equivalents	71.5	51.8	82.6	85.5
Accounts receivable, net	378.7	343.7
Inventories, net	162.5	144.0
Other current assets	75.9	69.7
Total current assets	688.6	609.2
Property, plant and equipment, net	702.1	675.1
Goodwill	8.6	8.6
Other assets and deferred charges, condensed	79.5	81.7
Investment in subsidiaries	0	0
Total assets	1,478.8	1,374.6
Current Liabilities
Accounts payable	291.7	267.4
Other current liabilities	82.9	76.4
Total current liabilities	374.6	343.8
Intercompany payable (receivable)	311.6	285.6
Long-term debt	77.0	61.0
Investment in subsidiaries obligation		0
Other long-term liabilities	59.7	62.8
Total liabilities	822.9	753.2
Total AAM stockholders' deficit	655.9	621.4
Noncontrolling interest in subsidiaries	0	0
Total stockholders’ deficit	655.9	621.4
Total liabilities and stockholders' deficit	1,478.8	1,374.6
Elims [Member]
Current Assets
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories, net	0	0
Other current assets	0	0
Total current assets	0	0
Property, plant and equipment, net	0	0
Goodwill	0	0
Other assets and deferred charges, condensed	0	0
Investment in subsidiaries	(1,360.6)	(1,297.5)
Total assets	(1,360.6)	(1,297.5)
Current Liabilities
Accounts payable	0	0
Other current liabilities	0	0
Total current liabilities	0	0
Intercompany payable (receivable)	0	0
Long-term debt	0	0
Investment in subsidiaries obligation		(7.6)
Other long-term liabilities	0	0
Total liabilities	0	(7.6)
Total AAM stockholders' deficit	(1,360.6)	(1,289.9)
Noncontrolling interest in subsidiaries	0	0
Total stockholders’ deficit	(1,360.6)	(1,289.9)
Total liabilities and stockholders' deficit	$ (1,360.6)	$ (1,297.5)

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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 100.8	$ 62.4
Accounts receivable, net	535.3	463.4
Inventories, net	240.6	224.3
Prepaid expenses and other	128.4	122.0
Total current assets	1,005.1	872.1
Property, plant and equipment, net	1,043.5	1,009.7
Deferred income taxes	365.6	366.1
Goodwill	156.4	156.4
GM postretirement cost sharing asset	253.8	259.7
Other assets and deferred charges	205.2	202.0
Total assets	3,029.6	2,866.0
Current Liabilities
Accounts payable	454.6	396.1
Accrued compensation and benefits	83.9	84.9
Deferred revenue	16.0	17.2
Accrued expenses and other current liabilities	96.6	102.6
Total current liabilities	651.1	600.8
Long-term debt	1,570.2	1,454.1
Deferred revenue	78.4	82.2
Postretirement benefits and other long-term liabilities	837.8	849.7
Total liabilities	3,137.5	2,986.8
Stockholders' Deficit
Common stock, par value $0.01 per share	0.8	0.8
Paid-in capital	602.2	600.9
Accumulated deficit	(268.5)	(275.8)
Treasury stock at cost, 6.0 million shares as of March 31, 2013 and December 31, 2012	(182.1)	(182.1)
Accumulated other comprehensive income (loss), net of tax
Defined benefit plans	(275.6)	(274.5)
Foreign currency translation adjustments	12.5	7.6
Unrecognized gain on derivatives	2.8	2.3
Total AAM stockholders' deficit	(107.9)	(120.8)
Noncontrolling interest in subsidiaries	0	0
Total stockholders’ deficit	(107.9)	(120.8)
Total liabilities and stockholders' deficit	$ 3,029.6	$ 2,866.0

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Inventories

3 Months Ended

Mar. 31, 2013

Inventories [Abstract]

Inventory Disclosure [Text Block]

3. INVENTORIES

We state our inventories at the lower of cost or market.  The cost of our inventories is determined using the FIFO 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: 

	March 31, 2013			December 31, 2012
	(in millions)
Raw materials and work-in-progress	$	241.0		$	220.3
Finished goods	27.9			25.0
Gross inventories	268.9			245.3
Inventory valuation reserves	(28.3		)	(21.0		)
Inventories, net	$	240.6		$	224.3

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Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2013

Reclassification Amount from Accumulated Other Comprehensive Income (Loss) [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Reclassification adjustments and other activity impacting accumulated other comprehensive income (loss) during the three months ended March 31, 2013 are as follows (in millions):

	Defined Benefit Plans			Foreign Currency Translation Adjustments		Unrecognized Gain on Derivatives			Total
Balance at December 31, 2012	$	(274.5	)	$	7.6	$	2.3		$	(264.6	)
Other comprehensive income (loss) before reclassifications	(3.6		)	4.9		1.7			3.0
Amounts reclassified from accumulated other comprehensive income (loss) (Recorded in cost of goods sold)	2.5			—		(1.2		)	1.3
Net current period other comprehensive income (loss)	(1.1		)	4.9		0.5			4.3
Balance at March 31, 2013	$	(275.6	)	$	12.5	$	2.8		$	(260.3	)

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Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Numerator
Net income attributable to AAM	$ 7.3	$ 51.2
Denominator
Basic shares outstanding - weighted-average shares outstanding	76.2	75.0
Effect of dilutive securities - dilutive stock-based compensation	$ 0	$ 0
Diluted shares outstanding - adjusted weighted-average shares after assumed conversion	76.2	75.0
Basic EPS	$ 0.10	$ 0.68
Diluted EPS	$ 0.10	$ 0.68
Antidilutive securities excluded from computation of earnings per share, amount	2.3	3.3
Earnings per share, range of exercise prices of Stock Options excluded from the calculation of diluted EPS, lower end of range	$ 15.58	$ 15.58
Earnings per share, range of exercise prices of Stock Options excluded from the calculation of diluted EPS, upper end of range	$ 40.83	$ 40.83

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Inventories (Tables)

3 Months Ended

Mar. 31, 2013

Inventories [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following: 

	March 31, 2013			December 31, 2012
	(in millions)
Raw materials and work-in-progress	$	241.0		$	220.3
Finished goods	27.9			25.0
Gross inventories	268.9			245.3
Inventory valuation reserves	(28.3		)	(21.0		)
Inventories, net	$	240.6		$	224.3