BorgWarner (BWA) 10-Q 30 Oct 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document	9 Months Ended
	Sep. 30, 2014	Oct. 24, 2014
Entity Information [Line Items]	'	'
Entity Registrant Name	'BORGWARNER INC.	'
Entity Central Index Key	'0000908255	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-14	'
Amendment Flag	'false	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Current Fiscal Year End Date	'--12-31	'
Entity Well-known Seasoned Issuer	'Yes	'
Entity Voluntary Filers	'No	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	227,373,617

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
ASSETS	'	'
Cash	$782.80	$939.50
Receivables, net	1,466.10	1,248.50
Inventories, net	531.8	458.1
Deferred income taxes	49.7	68.7
Prepayments and other current assets	121.4	83.7
Total current assets	2,951.80	2,798.50
Property, plant and equipment, net	2,067.40	1,939.40
Investments and advances	460.8	405.1
Goodwill	1,210.80	1,197
Other non-current assets	591.5	577
Total assets	7,282.30	6,917
LIABILITIES AND EQUITY	'	'
Notes payable and other short-term debt	605.7	201.6
Accounts payable and accrued expenses	1,503.90	1,383.80
Income taxes payable	13.2	38.5
Total current liabilities	2,122.80	1,623.90
Long-term debt	705.8	1,021
Other non-current liabilities:	'	'
Retirement-related liabilities	295.1	312.9
Other	358.4	326.8
Total other non-current liabilities	653.5	639.7
Common stock	2.5	2.5
Capital in excess of par value	1,104.30	1,121.90
Retained earnings	3,606.50	3,177.40
Accumulated other comprehensive loss	-199.9	-14
Common stock held in treasury	-782.8	-727.2
Total BorgWarner Inc. stockholders’ equity	3,730.60	3,560.60
Noncontrolling interest	69.6	71.8
Total equity	3,800.20	3,632.40
Total liabilities and equity	$7,282.30	$6,917

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]	'	'	'	'
Net sales	$2,032.10	$1,806.20	$6,313.20	$5,551.20
Cost of sales	1,607.60	1,426.60	4,970.10	4,400.30
Gross profit	424.5	379.6	1,343.10	1,150.90
Selling, general and administrative expenses	174.5	157.7	529.5	472.6
Other expense (income), net	12.3	-3.7	62.1	10.8
Operating income	237.7	225.6	751.5	667.5
Equity in affiliates’ earnings, net of tax	-14.8	-10.4	-35.8	-31.2
Interest income	-1.4	-1.3	-4.3	-3.3
Interest expense and finance charges	9	8.1	26.2	26.6
Earnings before income taxes and noncontrolling interest	244.9	229.2	765.4	675.4
Provision for income taxes	71.9	56.3	225.3	173.8
Net earnings	173	172.9	540.1	501.6
Net earnings attributable to the noncontrolling interest, net of tax	6.4	6.1	24.2	18.7
Net earnings attributable to BorgWarner Inc.	$166.60	$166.80	$515.90	$482.90
Earnings per share — basic	$0.73	$0.73	$2.27	$2.11
Earnings per share — diluted	$0.73	$0.72	$2.25	$2.08
Weighted average shares outstanding:	'	'	'	'
Basic	227,077	227,638	227,395	229,168
Diluted	228,668	230,476	229,222	231,936
Dividends declared per share	$0.13	$0.13	$0.38	$0.13

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]	'		'		'	'
Net earnings attributable to BorgWarner Inc.	$166.60		$166.80		$515.90	$482.90
Other comprehensive (loss) income	'		'		'	'
Foreign currency translation adjustments(a)	-196.1	[1]	94.5	[1]	-199.9	4.7
Hedge instruments(a)	11.9	[1]	0.4	[1]	11.3	14
Defined benefit postretirement plans(a)	2.9	[1]	1.9	[1]	2.8	11.1
Other(a)	0		0		-0.1	0.5
Total other comprehensive (loss) income attributable to BorgWarner Inc.	-181.3		96.8		-185.9	30.3
Comprehensive (loss) income attributable to BorgWarner Inc.	-14.7		263.6		330	513.2
Comprehensive (loss) income attributable to the noncontrolling interest	-1.8		2.7		-0.6	0.4
Comprehensive (loss) income	($16.50)		$266.30		$329.40	$513.60
[1]	Net of income taxes.

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
OPERATING	'	'
Net earnings	$540.10	$501.60
Adjustments to reconcile net earnings to net cash flows from operations:	'	'
Depreciation and tooling amortization	226.3	202.4
Amortization of intangible assets and other	20.7	20.1
Restructuring expense, net of cash paid	44.2	0
Stock-based compensation expense	24.1	29.3
Deferred income tax provision (benefit)	44.8	-9
Equity in affiliates’ earnings, net of dividends received, and other	-10.3	-28.2
Net earnings adjusted for non-cash charges to operations	889.9	716.2
Changes in assets and liabilities:	'	'
Receivables	-225.7	-195.3
Inventories	-50.8	-13
Prepayments and other current assets	-30.5	-39.7
Accounts payable and accrued expenses	74.4	85.5
Income taxes payable	-30.6	-25.9
Other non-current assets and liabilities	-80.5	-13
Net cash provided by operating activities	546.2	514.8
INVESTING	'	'
Capital expenditures, including tooling outlays	-397.9	-297.9
Net proceeds from asset disposals	3.2	22.8
Payments for business acquired, net of cash acquired	-106.4	0
Net cash used in investing activities	-501.1	-275.1
FINANCING	'	'
Net increase in notes payable	369.9	14.3
Additions to long-term debt, net of debt issuance costs	107.8	272
Repayments of long-term debt, including current portion	-422.7	-76.9
Payments for purchase of treasury stock	-90	-225.5
Proceeds from stock options exercised, including the tax benefit	16.2	25.3
Taxes paid on employees' restricted stock award vestings	-23.5	-29.2
Dividends paid to BorgWarner stockholders	-86.8	-28.5
Dividends paid to noncontrolling stockholders	-20.4	-10.7
Net cash used in financing activities	-149.5	-59.2
Effect of exchange rate changes on cash	-52.3	24.2
Net (decrease) increase in cash	-156.7	204.7
Cash at beginning of year	939.5	715.7
Cash at end of period	782.8	'
Net cash paid during the period for:	'	'
Interest	37.6	37.6
Income taxes	177.3	197.6
Non-cash investing transactions	'	'
Liabilities assumed from business acquired	3.2	0
Non-cash financing transactions	'	'
Debt assumed from business acquired	$40.30	$0

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying unaudited Condensed Consolidated Financial Statements of BorgWarner Inc. and Consolidated Subsidiaries (the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes necessary for a comprehensive presentation of financial position, results of operations and cash flow activity required by GAAP for complete financial statements. In the opinion of management, all normal recurring adjustments necessary for a fair presentation of results have been included. Operating results for the three and nine months ended September 30, 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014. The balance sheet as of December 31, 2013 was derived from the audited financial statements as of that date. For further information, refer to the Consolidated Financial Statements and Footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.
	On November 13, 2013, the Company's Board of Directors declared a two-for-one stock split effected in the form of a stock dividend on its common stock. To implement this stock split, shares of common stock were issued on December 16, 2013 to stockholders of record as of the close of business on December 2, 2013. All prior year share and per share amounts disclosed in this document have been restated to reflect the two-for-one stock split.
	Management makes estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and accompanying notes, as well as, the amounts of revenues and expenses reported during the periods covered by those financial statements and accompanying notes. Actual results could differ from these estimates.

Research_and_Development_Expen

Research and Development Expenditures	9 Months Ended
	Sep. 30, 2014
Research and Development [Abstract]	'
Research and Development Expenditures	'
	Research and Development Expenditures
	The Company's net Research & Development ("R&D") expenditures are included in selling, general and administrative expenses of the Condensed Consolidated Statements of Operations. Customer reimbursements are netted against gross R&D expenditures as they are considered a recovery of cost. Customer reimbursements for prototypes are recorded net of prototype costs based on customer contracts, typically either when the prototype is shipped or when it is accepted by the customer. Customer reimbursements for engineering services are recorded when performance obligations are satisfied in accordance with the contract and accepted by the customer. Financial risks and rewards transfer upon shipment, acceptance of a prototype component by the customer or upon completion of the performance obligation as stated in the respective customer agreement.
	The following table presents the Company’s gross and net expenditures on R&D activities:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	(millions of dollars)	2014			2013			2014			2013
	Gross R&D expenditures	$	96.1		$	84.7		$	292.1		$	250.9
	Customer reimbursements	(10.8		)	(12.9		)	(34.7		)	(34.7		)
	Net R&D expenditures	$	85.3		$	71.8		$	257.4		$	216.2
	The Company has contracts with several customers at the Company's various R&D locations. No such contract exceeded 5% of annual net R&D expenditures in any of the periods presented.

Other_Expense_Income_Net

Other Expense (Income), Net	9 Months Ended
	Sep. 30, 2014
Other Income and Expenses [Abstract]	'
Other Expense	'
	Other Expense (Income), net
	Items included in other expense (income), net consist of:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	(millions of dollars)	2014			2013			2014			2013
	Restructuring expense	$	13.1		$	—		$	67.6		$	—
	Pension settlement	2.7			—			2.7			—
	Program termination agreement	—			—			—			11.3
	Retirement related obligations	—			—			—			5.9
	Other income	(3.5		)	(3.7		)	(8.2		)	(6.4		)
	Other expense (income), net	$	12.3		$	(3.7	)	$	62.1		$	10.8
	During the first nine months of 2014, the Company recorded restructuring expense of $67.6 million related to Drivetrain and Engine segment actions designed to improve future profitability and competitiveness. See the Restructuring footnote for further discussion of these expenses.
	In July 2014, the Company discharged certain U.S. pension plan obligations by making lump-sum payments to former employees of the Company. As a result of this action, the Company recorded a settlement loss of $2.7 million in the U.S. pension plan during the third quarter of 2014.
	In March 2013, the Company recorded an $11.3 million expense related to a program termination agreement, which was paid in 2013.
	During the fourth quarter of 2012, the Company waived the forfeiture provision associated with future restricted stock grants made to certain retiring Named Executive Officers. The Company recorded a $5.9 million retirement related obligation primarily related to a first quarter 2013 grant of restricted stock awards to these Named Executive Officers.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	The Company's provision for income taxes is based upon an estimated annual tax rate for the year applied to federal, state and foreign income. On a quarterly basis, the annual effective tax rate is adjusted, as appropriate, based upon changed facts and circumstances, if any, as compared to those forecasted at the beginning of the fiscal year and each interim period thereafter.
	At September 30, 2014, the Company's effective tax rate for the first nine months was 29.4%, which includes tax benefits of $11.9 million and $0.9 million related to restructuring expense and the pension plan settlement loss, respectively, discussed in the Other Expense (Income), net footnote.
	At September 30, 2013, the Company's effective tax rate for the first nine months was 25.7%, which included tax benefits of $3.8 million and $2.1 million related to the program termination agreement and retirement related obligations discussed in the Other Expense (Income), net footnote. This rate also included a net tax benefit of $7.3 million, which is comprised of a $6.6 million tax benefit related to the extension of the federal research and development credit and other international tax provisions resulting from the retroactive impact of U.S. legislation enacted in January 2013, $3.1 million related to 2012 provision to return adjustments and $2.5 million related to the reversal of certain deferred tax asset valuation allowances, partially offset by a $4.9 million tax expense related to a comprehensive income adjustment.
	The annual effective tax rates differ from the U.S. statutory rate primarily due to foreign rates which differ from those in the U.S., the realization of certain business tax credits, including foreign tax credits, and favorable permanent differences between book and tax treatment for certain items, including equity in affiliates' earnings.

Inventories_net

Inventories, net	9 Months Ended
	Sep. 30, 2014
Inventory Disclosure [Abstract]	'
Inventories, net	'
	Inventories, net
	Inventories are valued at the lower of cost or market. The cost of U.S. inventories is determined by the last-in, first-out (“LIFO”) method, while the operations outside the U.S. use the first-in, first-out (“FIFO”) or average-cost methods. Inventories consisted of the following:
		September 30,			December 31,
	(millions of dollars)	2014			2013
	Raw material and supplies	$	322.3		$	279.8
	Work in progress	91.2			78
	Finished goods	136.5			116.3
	FIFO inventories	550			474.1
	LIFO reserve	(18.2		)	(16.0		)
	Inventories, net	$	531.8		$	458.1

Property_Plant_and_Equipment_n

Property, Plant and Equipment, net	9 Months Ended
	Sep. 30, 2014
Property, Plant and Equipment [Abstract]	'
Property, Plant and Equipment, net	'
	Property, Plant and Equipment, net
		September 30,			December 31,
	(millions of dollars)	2014			2013
	Land, land use rights and buildings	$	799.6		$	753.9
	Machinery and equipment	1,953.30			1,897.50
	Capital leases	8.8			2.4
	Construction in progress	282.3			272.3
	Total property, plant and equipment, gross	3,044.00			2,926.10
	Less: accumulated depreciation	(1,101.0		)	(1,099.3		)
	Property, plant and equipment, net, excluding tooling	1,943.00			1,826.80
	Tooling, net of amortization	124.4			112.6
	Property, plant and equipment, net	$	2,067.40		$	1,939.40
	As of September 30, 2014 and December 31, 2013, accounts payable of $46.9 million and $62.8 million, respectively, were related to property, plant and equipment purchases.
	Interest costs capitalized for the nine months ended September 30, 2014 and 2013 were $10.5 million and $8.5 million, respectively.

Product_Warranty

Product Warranty	9 Months Ended
	Sep. 30, 2014
Product Warranties Disclosures [Abstract]	'
Product Warranty	'
	Product Warranty
	The Company provides warranties on some, but not all, of its products. The warranty terms are typically from one to three years. Provisions for estimated expenses related to product warranty are made at the time products are sold. These estimates are established using historical information about the nature, frequency and average cost of warranty claim settlements as well as product manufacturing and industry developments and recoveries from third parties. Management actively studies trends of warranty claims and takes action to improve product quality and minimize warranty claims. Management believes that the warranty accrual is appropriate; however, actual claims incurred could differ from the original estimates, requiring adjustments to the accrual.
	The following table summarizes the activity in the product warranty accrual accounts:
	(millions of dollars)	2014			2013
	Beginning balance, January 1	$	72.7		$	64.9
	Provisions	27.7			29.1
	Acquisition(a)	22.8			—
	Payments	(32.4		)	(28.3		)
	Translation adjustment	(4.6		)	0.7
	Ending balance, September 30	$	86.2		$	66.4
	____________________________________
	(a)	The Company recorded a $12.4 million insurance receivable related to the $22.8 million liability, which is classified in the Condensed Consolidated Balance Sheet in Investments and advances.
	The product warranty liability is classified in the Condensed Consolidated Balance Sheets as follows:
		September 30,			December 31,
	(millions of dollars)	2014			2013
	Accounts payable and accrued expenses	$	27.7		$	38.4
	Other non-current liabilities	58.5			34.3
	Total product warranty liability	$	86.2		$	72.7

Notes_Payable_and_LongTerm_Deb

Notes Payable and Long-Term Debt	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Notes Payable and Long-Term Debt	'
	Notes Payable and Long-Term Debt
	As of September 30, 2014 and December 31, 2013, the Company had short-term and long-term debt outstanding as follows:
		September 30,		December 31,
	(millions of dollars)	2014		2013
	Short-term debt
	Short-term borrowings	$	478	$	84.8
	Receivables securitization	110		110
	Total short-term debt	$	588	$	194.8
	Long-term debt
	5.75% Senior notes due 11/01/16 ($150 million par value)	$	149.7	$	149.7
	8.00% Senior notes due 10/01/19 ($134 million par value)	134		133.9
	4.625% Senior notes due 09/15/20 ($250 million par value)	248.4		248.2
	7.125% Senior notes due 02/15/29 ($121 million par value)	119.4		119.4
	Multi-currency revolving credit facility	—		320
	Term loan facilities and other	58.8		40.4
	Unamortized portion of debt derivatives	13.2		16.2
	Total long-term debt	723.5		1,027.80
	Less: current portion	17.7		6.8
	Long-term debt, net of current portion	$	705.8	$	1,021.00
	The weighted average interest rate on all borrowings outstanding as of September 30, 2014 and December 31, 2013 was 3.3% and 3.7%, respectively.
	On June 30, 2014, the Company amended and extended its $750 million multi-currency revolving credit facility (which included a feature that allowed the Company's borrowings to be increased to $1 billion) to a $1 billion multi-currency revolving credit facility (which includes a feature that allows the Company's borrowings to be increased to $1.25 billion). The facility provides for borrowings through June 30, 2019. The Company has one key financial covenant as part of the credit agreement which is a debt to EBITDA ("Earnings Before Interest, Taxes, Depreciation and Amortization") ratio. The Company was in compliance with the financial covenant at September 30, 2014 and expects to remain compliant in future periods. At September 30, 2014, the Company had no outstanding borrowings under this facility. At December 31, 2013, the Company had outstanding borrowings of $320.0 million under the multi-currency revolving credit agreement.
	On March 12, 2014, the Company entered into a new commercial paper program pursuant to which the Company may issue short-term, unsecured commercial paper notes up to a maximum aggregate principal amount outstanding of $1 billion. Under this program, the Company may issue notes from time to time and will use the proceeds for general corporate purposes. At September 30, 2014, the Company had outstanding borrowings of $355.0 million under this program, which is classified in the Condensed Consolidated Balance Sheet in Notes payable and other short-term debt.
	The total current combined borrowing capacity under the multi-currency revolving credit facility and commercial paper program cannot exceed $1 billion.
	On February 11, 2014, the Company's universal shelf registration expired. The Company filed a new universal shelf registration with the Securities and Exchange Commission on February 28, 2014.
	As of September 30, 2014 and December 31, 2013, the estimated fair values of the Company’s senior unsecured notes totaled $749.1 million and $729.7 million, respectively. The estimated fair values were $97.6 million and $78.5 million higher than their carrying value at September 30, 2014 and December 31, 2013, respectively. Fair market values of the senior unsecured notes are developed using observable values for similar debt instruments, which are considered Level 2 inputs as defined by ASC Topic 820. The carrying values of the Company's multi-currency revolving credit facility and commercial paper program approximates fair value. The fair value estimates do not necessarily reflect the values the Company could realize in the current markets.
	The Company had outstanding letters of credit of $29.2 million and $27.8 million at September 30, 2014 and December 31, 2013, respectively. The letters of credit typically act as guarantees of payment to certain third parties in accordance with specified terms and conditions.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	ASC Topic 820 emphasizes that fair value is a market-based measurement, not an entity specific measurement. Therefore, a fair value measurement should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering market participant assumptions in fair value measurements, ASC Topic 820 establishes a fair value hierarchy, which prioritizes the inputs used in measuring fair values as follows:
	Level 1:	Observable inputs such as quoted prices for identical assets or liabilities 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.
	Assets and liabilities measured at fair value are based on one or more of the following three valuation techniques noted in ASC Topic 820:
	A.	Market approach: Prices and other relevant information generated by market transactions involving identical or comparable assets, liabilities or a group of assets or liabilities, such as a business.
	B.	Cost approach: Amount that would be required to replace the service capacity of an asset (replacement cost).
	C.	Income approach: Techniques to convert future amounts to a single present amount based upon market expectations (including present value techniques, option-pricing and excess earnings models).
	The following tables classify assets and liabilities measured at fair value on a recurring basis as of September 30, 2014 and December 31, 2013:
				Basis of fair value measurements
	(millions of dollars)	Balance at September 30, 2014		Quoted prices in active markets for identical items		Significant other observable inputs		Significant unobservable inputs		Valuation technique
				(Level 1)		(Level 2)		(Level 3)
	Assets:
	Foreign currency contracts	$	3.7	$	—	$	3.7	$	—	A
	Other non-current assets (insurance settlement agreement note receivable)	$	29.2	$	—	$	29.2	$	—	C
	Liabilities:
	Foreign currency contracts	$	1.4	$	—	$	1.4	$	—	A
	Net investment hedge contracts	$	9.5	$	—	$	9.5	$	—	A
				Basis of fair value measurements
	(millions of dollars)	Balance at		Quoted prices in active markets for identical items		Significant other observable inputs		Significant unobservable inputs		Valuation
		31-Dec-13		(Level 1)		(Level 2)		(Level 3)		technique
	Assets:
	Foreign currency contracts	$	3.4	$	—	$	3.4	$	—	A
	Other non-current assets (insurance settlement agreement note receivable)	$	35.6	$	—	$	35.6	$	—	C
	Liabilities:
	Foreign currency contracts	$	7.4	$	—	$	7.4	$	—	A
	Net investment hedge contracts	$	24.3	$	—	$	24.3	$	—	A

Financial_Instruments

Financial Instruments	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Financial Instruments	'
	Financial Instruments
	The Company’s financial instruments include cash and marketable securities. Due to the short-term nature of these instruments, their book value approximates their fair value. The Company’s financial instruments also include long-term debt, interest rate and cross-currency swaps, commodity derivative contracts and foreign currency derivatives. All derivative contracts are placed with counterparties that have an S&P, or equivalent, investment grade credit rating at the time of the contracts’ placement. At September 30, 2014 and December 31, 2013, the Company had no derivative contracts that contained credit risk related contingent features.
	The Company selectively uses cross-currency swaps to hedge the foreign currency exposure associated with its net investment in certain foreign operations (net investment hedges). Exchange rates at the end of the third quarter of 2014 allowed for the early termination of the Euro cross-currency swap position at a zero cash outlay. The Company elected to take this option and no longer holds a Euro cross-currency swap position as of September 30, 2014. The impact on net earnings in the three and nine months ended September 30, 2014 was negligible.
	At September 30, 2014 and December 31, 2013, the following cross-currency swaps were outstanding:
	(in millions)	Cross-currency swaps
	As of September 30, 2014	Notional in				Notional in				Duration
		USD				local currency
	Floating $ to floating ¥	$	125			€	14,651.30			16-Nov
	(in millions)	Cross-currency swaps
	As of December 31, 2013	Notional in				Notional in				Duration
		USD				local currency
	Floating $ to floating €	$	75			€	58.5			19-Oct
	Floating $ to floating ¥	$	150			¥	17,581.50			16-Nov
	The Company uses certain commodity derivative contracts to protect against commodity price changes related to forecasted raw material and supplies purchases. The Company primarily utilizes forward and option contracts, which are designated as cash flow hedges. The Company did not have any commodity derivative contracts outstanding at September 30, 2014 and December 31, 2013.
	The Company uses foreign currency forward and option contracts to protect against exchange rate movements for forecasted cash flows, including capital expenditures, purchases, operating expenses or sales transactions designated in currencies other than the functional currency of the operating unit. Foreign currency derivative contracts require the Company, at a future date, to either buy or sell foreign currency in exchange for the operating units’ local currency.
	At September 30, 2014 and December 31, 2013, the following foreign currency derivative contracts were outstanding:
	Foreign currency derivatives (in millions)
	Functional currency	Traded currency		Notional in traded currency			Notional in traded currency			Duration
				30-Sep-14			31-Dec-13
	Brazilian real	US dollar		4.8			19.3			14-Dec
	Chinese yuan	Japanese yen		—			215			14-Feb
	Chinese yuan	US dollar		3.3			12.3			14-Dec
	Euro	British pound		0.7			3			14-Dec
	Euro	Hungarian forint		1,587.80			6,430.50			14-Dec
	Euro	Japanese yen		1,380.20			5,830.70			14-Dec
	Euro	Korean won		—			663.1			14-Jul
	Euro	Polish zloty		22.8			96			14-Dec
	Euro	US dollar		12.8			29.4			15-Dec
	Hungarian forint	Euro		1.6			6.6			14-Dec
	Japanese yen	Chinese yuan		110.9			84			15-Dec
	Japanese yen	Korean won		8,508.70			5,715.50			15-Dec
	Japanese yen	US dollar		4.8			4.2			15-Dec
	Korean won	Euro		8			23.6			15-Dec
	Korean won	Japanese yen		115			380.5			14-Dec
	Korean won	US dollar		25.8			—			15-Dec
	Mexican peso	US dollar		3.8			—			14-Dec
	Swedish krona	Euro		9.7			33.7			14-Dec
	US dollar	Japanese yen		3,000.00			3,209.30			14-Dec
	At September 30, 2014 and December 31, 2013, the following amounts were recorded in the Condensed Consolidated Balance Sheets as being payable to or receivable from counterparties under ASC Topic 815:
		Assets										Liabilities
	(millions of dollars)	Location		30-Sep-14				31-Dec-13				Location	30-Sep-14			31-Dec-13
	Foreign currency contracts	Prepayments and other current assets		$	3.2			$	3.4			Accounts payable and accrued expenses	$	1.3		$	7.4
		Other non-current assets		$	0.5			$	—			Other non-current liabilities	$	0.1		$	—
	Net investment hedge contracts	Other non-current assets		$	—			$	—			Other non-current liabilities	$	9.5		$	24.3
	Effectiveness for cash flow and net investment hedges is assessed at the inception of the hedging relationship and quarterly, thereafter. To the extent that derivative instruments are deemed to be effective, gains and losses arising from these contracts are deferred into accumulated other comprehensive income (loss) ("AOCI") and reclassified into income as the underlying operating transactions are recognized. These realized gains or losses offset the hedged transaction and are recorded on the same line in the statement of operations. To the extent that derivative instruments are deemed to be ineffective, gains or losses are recognized into income.
	The table below shows deferred gains (losses) reported in AOCI as well as the amount expected to be reclassified to income in one year or less. The amount expected to be reclassified to income in one year or less assumes no change in the current relationship of the hedged item at September 30, 2014 market rates.
	(millions of dollars)	Deferred gain (loss) in AOCI at								Gain (loss) expected to be reclassified to income in one year or less
	Contract Type	30-Sep-14				31-Dec-13
	Foreign currency	$	1.9			$	(3.7	)		$	1.5
	Net investment hedges	(10.8		)		(22.1		)		—
	Total	$	(8.9	)		$	(25.8	)		$	1.5
	Derivative instruments designated as hedging instruments as defined by ASC Topic 815 held during the period resulted in the following gains and losses recorded in income:
				Gain (loss) reclassified									Gain (loss)
				from AOCI to income									recognized in income
				(effective portion)									(ineffective portion)
	(millions of dollars)			Three Months Ended									Three Months Ended
	Contract Type	Location		30-Sep-14				30-Sep-13				Location	30-Sep-14			30-Sep-13
	Foreign currency	Sales		$	0.7			$	0.7			SG&A expense	$	0.1		$	—
	Foreign currency	Cost of goods sold		$	0.2			$	(4.1	)		SG&A expense	$	(0.1	)	$	(0.1	)
	Foreign currency	SG&A expense		$	(0.2	)		$	(0.1	)		SG&A expense	$	—		$	—
	Cross-currency swap	N/A										Interest expense	$	0.4		$	0.4
				Gain (loss) reclassified									Gain (loss)
				from AOCI to income									recognized in income
(effective portion)							(ineffective portion)
(millions of dollars)			Nine Months Ended									Nine Months Ended
Contract Type	Location		30-Sep-14				30-Sep-13				Location	30-Sep-14			30-Sep-13
Foreign currency	Sales		$	2			$	1.6			SG&A expense	$	0.2		$	0.2
Foreign currency	Cost of goods sold		$	(1.6	)		$	(10.1	)		SG&A expense	$	(0.1	)	$	(0.8	)
Foreign currency	SG&A expense		$	(0.6	)		$	(0.2	)		SG&A expense	$	—		$	—
Cross-currency swap	N/A										Interest expense	$	1		$	0.1
At September 30, 2014, derivative instruments that were not designated as hedging instruments as defined by ASC Topic 815 were immaterial.

Retirement_Benefit_Plans

Retirement Benefit Plans	9 Months Ended
	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Retirement Benefit Plans	'
	Retirement Benefit Plans
	The Company has a number of defined benefit pension plans and other postretirement benefit plans covering eligible salaried and hourly employees and their dependents. The estimated contributions to the Company's defined benefit pension plans for 2014 range from $15.0 million to $25.0 million, of which $14.5 million has been contributed through the first nine months of the year. The other postretirement benefit plans, which provide medical and life insurance benefits, are unfunded plans.
	In July 2014, the Company discharged certain U.S. pension plan obligations by making lump-sum payments to former employees of the Company. As a result of this action, the Company recorded a settlement loss of $2.7 million in the U.S. pension plan during the third quarter of 2014.
	The components of net periodic benefit cost recorded in the Condensed Consolidated Statements of Operations are as follows:
		Pension benefits												Other post-
														retirement benefits
	(millions of dollars)	2014						2013						2014			2013
	Three Months Ended September 30,	US			Non-US			US			Non-US
	Service cost	$	—		$	3.3		$	—		$	3.1		$	0.1		$	0.1
	Interest cost	2.9			4.5			2.9			4.2			1.6			1.7
	Expected return on plan assets	(4.4		)	(5.3		)	(4.6		)	(2.8		)	—			—
	Settlement	2.7			—			—			—			—			—
	Amortization of unrecognized prior service benefit	(0.2		)	—			(0.2		)	—			(1.5		)	(1.6		)
	Amortization of unrecognized loss	1.6			1.1			2.1			1.3			0.7			1.2
	Net periodic benefit cost	$	2.6		$	3.6		$	0.2		$	5.8		$	0.9		$	1.4
		Pension benefits												Other post-
														retirement benefits
	(millions of dollars)	2014						2013						2014			2013
	Nine Months Ended September 30,	US			Non-US			US			Non-US
	Service cost	$	—		$	9.8		$	—		$	9.3		$	0.2		$	0.3
	Interest cost	9.1			13.8			8.7			12.4			5			5.1
	Expected return on plan assets	(13.2		)	(16.1		)	(13.7		)	(8.2		)	—			—
	Settlement	2.7			—			—			—			—			—
	Amortization of unrecognized prior service benefit	(0.6		)	—			(0.6		)	—			(4.7		)	(4.8		)
	Amortization of unrecognized loss	4.9			3.6			6.2			3.9			2			3.7
	Net periodic benefit cost	$	2.9		$	11.1		$	0.6		$	17.4		$	2.5		$	4.3

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Compensation	'
	Stock-Based Compensation
	Under the Company's 2004 Stock Incentive Plan ("2004 Plan"), the Company granted options to purchase shares of the Company's common stock at the fair market value on the date of grant. The options vested over periods up to three years and have a term of 10 years from date of grant. At its November 2007 meeting, the Company's Compensation Committee decided that restricted common stock awards and stock units ("restricted stock") would be awarded in place of stock options for long-term incentive award grants to employees. Restricted stock granted to employees vests 50% after two years and the remainder after three years from the date of grant. Restricted stock granted to non-employee directors generally vests on the anniversary date of the grant. In February 2014, the Company's Board of Directors replaced the expired 2004 Plan by adopting the BorgWarner Inc. 2014 Stock Incentive Plan ("the 2014 Plan"). On April 30, 2014, the Company's stockholders approved the 2014 Plan. Under the 2014 Plan, approximately 8 million shares are authorized for grant and are available for future issuance as of September 30, 2014.
	Stock options A summary of the Company’s stock option activity for the nine months ended September 30, 2014 is as follows:
		Shares under option		Weighted average exercise price		Weighted average remaining contractual life	Aggregate intrinsic value
		(thousands)				(in years)	(in millions)
	Outstanding and exercisable at December 31, 2013	1,997		$	15.82	2.6	$	80
	Exercised	(54	)	$	14.41
	Outstanding and exercisable at March 31, 2014	1,943		$	15.86	2.4	$	88.6
	Exercised	(101	)	$	14.03
	Outstanding and exercisable at June 30, 2014	1,842		$	15.96	2.2	$	90.7
	Exercised	(114	)	$	13.73
	Outstanding and exercisable at September 30, 2014	1,728		$	16.1	1.9	$	63.1
	Restricted stock The value of restricted stock is determined by the market value of the Company’s common stock at the date of grant. In 2014, restricted stock in the amount of 426,150 shares was granted to employees. Restricted stock in the amount of 18,730 shares was granted to non-employee directors under the 2014 Stock Incentive Plan in 2014. The value of the awards is recorded as unearned compensation within capital in excess of par value in equity and is amortized as compensation expense over the restriction periods.
	The Company recorded restricted stock compensation expense of $5.4 million and $15.3 million for the three and nine months ended September 30, 2014, respectively, and $4.9 million and $20.8 million for the three and nine months ended September 30, 2013, respectively.
	During the fourth quarter of 2012, the Company waived the forfeiture provision associated with future restricted stock grants made to certain retiring Named Executive Officers. The expense of $20.8 million for the nine months ended September 30, 2013 includes $5.5 million of expense related to the grant of restricted stock awards to these Named Executive Officers.
	A summary of the Company’s nonvested restricted stock for the nine months ended September 30, 2014 is as follows:
		Shares subject to restriction		Weighted average price
		(thousands)
	Nonvested at December 31, 2013	1,411		$	37.86
	Granted	420		$	53.9
	Vested	(498	)	$	37.38
	Forfeited	(16	)	$	39.54
	Nonvested at March 31, 2014	1,317		$	43.08
	Granted	22		$	62.04
	Vested	(31	)	$	37.84
	Forfeited	(15	)	$	41.77
	Nonvested at June 30, 2014	1,293		$	43.54
	Granted	3		$	62.14
	Vested	(1	)	$	35.95
	Forfeited	(15	)	$	42.85
	Nonvested at September 30, 2014	1,280		$	43.6

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Abstract]	'
Accumulated Other Comprehensive Income (Loss)	'
	Accumulated Other Comprehensive Loss
	The following tables summarize the activity within accumulated other comprehensive loss during the nine months ended September 30, 2014 and September 30, 2013:
	(millions of dollars)	Foreign currency translation adjustments			Hedge instruments			Defined benefit postretirement plans			Other			Total
	Beginning Balance, December 31, 2013	$	181.1		$	(16.0	)	$	(181.5	)	$	2.4		$	(14.0	)
	Comprehensive loss before reclassifications	(199.9		)	16.7			—			(0.1		)	(183.3		)
	Income taxes associated with comprehensive income (loss) before reclassifications	—			(5.7		)	—			—			(5.7		)
	Reclassification from accumulated other comprehensive income	—			0.2			5.2			—			5.4
	Income taxes reclassified into net earnings	—			0.1			(2.4		)	—			(2.3		)
	Ending Balance September 30, 2014	$	(18.8	)	$	(4.7	)	$	(178.7	)	$	2.3		$	(199.9	)
	(millions of dollars)	Foreign currency translation adjustments			Hedge instruments			Defined benefit postretirement plans			Other			Total
	Beginning Balance, December 31, 2012	$	140.8		$	(37.2	)	$	(225.8	)	$	0.9		$	(121.3	)
	Comprehensive loss before reclassifications	4.7			12.1			1.4			0.5			18.7
	Income taxes associated with comprehensive loss before reclassifications	—			(8.5		)	—			—			(8.5		)
	Reclassification from accumulated other comprehensive income	—			8.7			8.4			—			17.1
	Income taxes reclassified into net earnings	—			1.7			1.3			—			3
	Ending Balance September 30, 2013	$	145.5		$	(23.2	)	$	(214.7	)	$	1.4		$	(91.0	)

Contingencies

Contingencies	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Contingencies	'
	In the normal course of business, the Company is party to various commercial and legal claims, actions and complaints, including matters involving warranty claims, intellectual property claims, general liability and various other risks. It is not possible to predict with certainty whether or not the Company will ultimately be successful in any of these commercial and legal matters or, if not, what the impact might be. The Company's environmental and product liability contingencies are discussed separately below. The Company's management does not expect that an adverse outcome in any of these commercial and legal claims, actions and complaints will have a material adverse effect on the Company's results of operations, financial position or cash flows, although it could be material to the results of operations in a particular quarter.
	Litigation
	In January 2006, BorgWarner Diversified Transmission Products Inc. ("DTP"), a subsidiary of the Company, filed a declaratory judgment action in United States District Court, Southern District of Indiana (Indianapolis Division) against the United Automobile, Aerospace, and Agricultural Implements Workers of America (“UAW”) Local No. 287 and Gerald Poor, individually and as the representative of a defendant class. DTP sought the Court's affirmation that DTP did not violate the Labor-Management Relations Act or the Employee Retirement Income Security Act (ERISA) by unilaterally amending certain medical plans effective April 1, 2006 and October 1, 2006, prior to the expiration of the then-current collective bargaining agreements. On September 10, 2008, the Court found that DTP's reservation of the right to make such amendments reducing the level of benefits provided to retirees was limited by its collectively bargained health insurance agreement with the UAW, which did not expire until April 24, 2009. Thus, the amendments were untimely. In 2008, the Company recorded a charge of $4.0 million as a result of the Court's decision.
	DTP filed a declaratory judgment action in the United States District Court, Southern District of Indiana (Indianapolis Division) against the UAW Local No. 287 and Jim Barrett and others, individually and as representatives of a defendant class, on February 26, 2009 again seeking the Court's affirmation that DTP did not violate the Labor - Management Relations Act or ERISA by modifying the level of benefits provided retirees to make them comparable to other Company retiree benefit plans after April 24, 2009. Certain retirees, on behalf of themselves and others, filed a mirror-image action in the United States District Court, Eastern District of Michigan (Southern Division) on March 11, 2009, for which a class has been certified. During the last quarter of 2009, the action pending in Indiana was dismissed, while the action in Michigan is continuing. The Company is vigorously defending against the suit.  This contingency is subject to many uncertainties, therefore based on the information available to date, the Company cannot reasonably estimate the amount or the range of potential loss, if any.
	Environmental
	The Company and certain of its current and former direct and indirect corporate predecessors, subsidiaries and divisions have been identified by the United States Environmental Protection Agency and certain state environmental agencies and private parties as potentially responsible parties (“PRPs”) at various hazardous waste disposal sites under the Comprehensive Environmental Response, Compensation and Liability Act (“Superfund”) and equivalent state laws and, as such, may presently be liable for the cost of clean-up and other remedial activities at 27 such sites. Responsibility for clean-up and other remedial activities at a Superfund site is typically shared among PRPs based on an allocation formula.
	The Company believes that none of these matters, individually or in the aggregate, will have a material adverse effect on its results of operations, financial position or cash flows. Generally, this is because either the estimates of the maximum potential liability at a site are not material or the liability will be shared with other PRPs, although no assurance can be given with respect to the ultimate outcome of any such matter.
	Based on information available to the Company (which in most cases includes: an estimate of allocation of liability among PRPs; the probability that other PRPs, many of whom are large, solvent public companies, will fully pay the cost apportioned to them; currently available information from PRPs and/or federal or state environmental agencies concerning the scope of contamination and estimated remediation and consulting costs; and remediation alternatives), the Company has an accrual for indicated environmental liabilities of $6.8 million and $4.0 million at September 30, 2014 and at December 31, 2013, respectively. The Company expects to pay out substantially all of the amounts accrued for environmental liability over the next five years.
	In connection with the sale of Kuhlman Electric Corporation (“Kuhlman Electric”), the Company agreed to indemnify the buyer and Kuhlman Electric for certain environmental liabilities, then unknown to the Company, relating to certain operations of Kuhlman Electric that pre-date the Company's 1999 acquisition of Kuhlman Electric. The Company previously settled or obtained dismissals of various lawsuits that were filed against Kuhlman Electric and others, including the Company, on behalf of plaintiffs alleging personal injury relating to alleged environmental contamination at its Crystal Springs, Mississippi plant. The Company filed a lawsuit against Kuhlman Electric and a related entity challenging the validity of the indemnity and the defendants filed counterclaims and a related lawsuit. In addition, two lawsuits by plaintiffs alleging environmental contamination relating to Kuhlman Electric's Crystal Springs plant are still pending and the Company may in the future become subject to further legal proceedings.
	Product Liability
	Like many other industrial companies who have historically operated in the U.S., the Company (or parties the Company is obligated to indemnify) continues to be named as one of many defendants in asbestos-related personal injury actions. We believe that the Company's involvement is limited because, in general, these claims relate to a few types of automotive friction products that were manufactured many years ago and contained encapsulated asbestos. The nature of the fibers, the encapsulation and the manner of use lead the Company to believe that these products are highly unlikely to cause harm. As of September 30, 2014 and December 31, 2013, the Company had approximately 18,000 and 17,000 pending asbestos-related product liability claims, respectively. Of the approximately 18,000 outstanding claims at September 30, 2014, approximately half were pending in jurisdictions that have undergone significant tort and judicial reform activities subsequent to the filing of these claims.
	The Company's policy is to vigorously defend against these lawsuits and the Company has been successful in obtaining dismissal of many claims without any payment. The Company expects that the vast majority of the pending asbestos-related product liability claims where it is a defendant (or has an obligation to indemnify a defendant) will result in no payment being made by the Company or its insurers. In 2014, of the approximately 1,500 claims resolved, 299 (20%) resulted in payment being made to a claimant by or on behalf of the Company. In the full year of 2013, of the approximately 1,500 claims resolved, 297 (20%) resulted in payment being made to a claimant by or on behalf of the Company.
	Prior to June 2004, the settlement and defense costs associated with all claims were paid by the Company's primary layer insurance carriers under a series of funding arrangements. In addition to the primary insurance available for asbestos-related claims, the Company has substantial excess insurance coverage available for potential future asbestos-related product claims. In June 2004, primary layer insurance carriers notified the Company of the alleged exhaustion of their policy limits.
	A declaratory judgment action was filed in January 2004 in the Circuit Court of Cook County, Illinois by Continental Casualty Company and related companies against the Company and certain of its historical general liability insurers. The court has issued a number of interim rulings and discovery is continuing. The Company has entered into settlement agreements with some of its insurance carriers, resolving their coverage disputes by agreeing to pay specified amounts to the Company. The Company is vigorously pursuing the litigation against the remaining insurers.
	In August 2013, the Los Angeles Superior Court entered a jury verdict against the Company in an asbestos-related personal injury action with damages of $35.0 million, $32.5 million of which was non-compensatory and will not be recoverable through insurance if the verdict is upheld. The Company has appealed this verdict. The Company posted a surety bond of $55.0 million related to the appeal. The Company cannot predict the outcome of this pending litigation and therefore cannot reasonably estimate the amount of possible loss, if any, that could result from this action.
	Although it is impossible to predict the outcome of pending or future claims or the impact of tort reform legislation that may be enacted at the state or federal levels, due to the encapsulated nature of the products, the Company's experience in vigorously defending and resolving claims in the past, and the Company's significant insurance coverage with solvent carriers as of the date of this filing, management does not believe that asbestos-related product liability claims are likely to have a material adverse effect on the Company's results of operations, financial position or cash flows.
	To date, the Company has paid and accrued $323.7 million in defense and indemnity in advance of insurers' reimbursement and has received $124.9 million in cash and notes from insurers. The net balance of $198.8 million, is expected to be fully recovered. Timing of recovery is dependent on final resolution of the declaratory judgment action referred to above or additional negotiated settlements. At December 31, 2013, insurers owed $153.6 million in association with these claims.
	In addition to the $198.8 million net balance relating to past settlements and defense costs, the Company has estimated a liability of $111.8 million for claims asserted, but not yet resolved and their related defense costs at September 30, 2014. The Company also has a related asset of $111.8 million to recognize proceeds from the insurance carriers, which is expected to be fully recovered. Receipt of these proceeds is not expected prior to the resolution of the declaratory judgment action referred to above, which is expected to occur subsequent to September 30, 2015. At December 31, 2013, the comparable value of the accrued liability and associated insurance asset was $96.7 million.
	The amounts recorded in the Condensed Consolidated Balance Sheets related to the estimated future settlement of existing claims are as follows:
	(millions of dollars)	September 30,		December 31, 2013
		2014
	Assets:
	Other non-current assets	$	111.8	$	96.7
	Total insurance assets	$	111.8	$	96.7
	Liabilities:
	Accounts payable and accrued expenses	$	46.8	$	41.1
	Other non-current liabilities	65		55.6
	Total accrued liabilities	$	111.8	$	96.7
	The 2014 increase in the accrued liability and associated insurance asset is primarily due to an expected higher rate of claim settlement based on recent litigation claim activity.
	The Company cannot reasonably estimate possible losses, if any, in excess of those for which it has accrued, because it cannot predict how many additional claims may be brought against the Company (or parties the Company has an obligation to indemnify) in the future, the allegations in such claims, the possible outcomes, or the impact of tort reform legislation that may be enacted at the state or federal levels.

Restructuring

Restructuring	9 Months Ended
	Sep. 30, 2014
Restructuring and Related Activities [Abstract]	'
Restructuring	'
	Restructuring
	In the fourth quarter of 2013, the Company initiated actions primarily in the Drivetrain segment designed to improve future profitability and competitiveness. As a continuation of these actions, in the first quarter of 2014, the Company finalized severance agreements with two labor unions at separate facilities in Western Europe for approximately 350 employees. The Company recorded $7.4 million and $52.2 million of restructuring expense in the three and nine months ended September 30, 2014, respectively, related to these facilities. Included in this restructuring expense are employee termination benefits of $5.3 million and $43.8 million, respectively, and other expense of $2.1 million and $8.4 million, respectively.
	The Company expects additional restructuring expenses to be incurred over the next two years related to the Drivetrain segment, including approximately $15 million of employee termination benefits associated with the severance agreements discussed above. These expenses will be recognized as employees render service in accordance with terms of the agreements. Future cash payments for these restructuring activities are expected to be complete by the end of 2015.
	On February 28, 2014, the Company acquired 100% of the equity interests in Gustav Wahler GmbH u. Co. KG and its general partner ("Wahler"). In the second quarter of 2014, the Company initiated actions to improve the future profitability and competitiveness of Wahler and recorded $2.2 million and $5.3 million of employee termination benefits in the three and nine months ended September 30, 2014, respectively. These termination benefits relate to approximately 80 employees in Germany, Brazil and China. The Company expects additional restructuring expenses to be incurred over the next two years related to the Wahler acquisition.
	Estimates of restructuring expense are based on information available at the time such charges are recorded. Due to the inherent uncertainty involved in estimating restructuring expenses, actual amounts paid for such activities may differ from amounts initially recorded. Accordingly, the Company may record revisions of previous estimates by adjusting previously established accruals.
	The Company recorded $3.5 million and $6.6 million of restructuring expense in the three and nine months ended September 30, 2014, respectively, related to a global realignment plan intended to enhance treasury management flexibility by creating a legal entity structure that better aligns with the Company's business strategy.
	The following table displays a rollforward of the employee related restructuring accruals recorded within the Company's Consolidated Balance Sheet and the related cash flow activity for the nine months ended September 30, 2014:
		Employee Related Accruals
	(millions of dollars)	Drivetrain			Engine			Total
	Balance at December 31, 2013	$	8.4		$	2.8		$	11.2
	Provision	32.1			0.7			32.8
	Cash payments	(1.2		)	(1.6		)	(2.8		)
	Translation adjustment	—			—			—
	Balance at March 31, 2014	$	39.3		$	1.9		$	41.2
	Provision	6.4			3.6			10
	Cash payments	(2.7		)	(3.9		)	(6.6		)
	Translation adjustment	(0.2		)	—			(0.2		)
	Balance at June 30, 2014	$	42.8		$	1.6		$	44.4
	Provision	5.3			2.2			7.5
	Cash payments	(1.1		)	(1.4		)	(2.5		)
	Translation adjustment	(3.2		)	(0.2		)	(3.4		)
	Balance at September 30, 2014	$	43.8		$	2.2		$	46

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Earnings Per Share
	The Company presents both basic and diluted earnings per share of common stock (“EPS”) amounts. Basic EPS is calculated by dividing net earnings attributable to BorgWarner Inc. by the weighted average shares of common stock outstanding during the reporting period. Diluted EPS is calculated by dividing net earnings attributable to BorgWarner Inc. by the weighted average shares of common stock and common equivalent stock outstanding during the reporting period.
	The dilutive impact of stock-based compensation is calculated using the treasury stock method. The treasury stock method assumes that the Company uses the assumed proceeds from the exercise of awards to repurchase common stock at the average market price during the period. The assumed proceeds under the treasury stock method include the purchase price that the grantee will pay in the future, compensation cost for future service that the Company has not yet recognized and any windfall/(shortfall) tax benefits that would be credited/(debited) to capital in excess of par value when the award generates a tax deduction. Options are only dilutive when the average market price of the underlying common stock exceeds the exercise price of the options.
	The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share of common stock:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	(in millions, except per share amounts)	2014		2013		2014		2013
	Basic earnings per share:
	Net earnings attributable to BorgWarner Inc.	$	166.6	$	166.8	$	515.9	$	482.9
	Weighted average shares of common stock outstanding	227.077		227.638		227.395		229.168
	Basic earnings per share of common stock	$	0.73	$	0.73	$	2.27	$	2.11
	Diluted earnings per share:
	Net earnings attributable to BorgWarner Inc.	$	166.6	$	166.8	$	515.9	$	482.9
	Weighted average shares of common stock outstanding	227.077		227.638		227.395		229.168
	Effect of stock-based compensation	1.591		2.838		1.827		2.768
	Weighted average shares of common stock outstanding including dilutive shares	228.668		230.476		229.222		231.936
	Diluted earnings per share of common stock	$	0.73	$	0.72	$	2.25	$	2.08

Reporting_Segments

Reporting Segments	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Reporting Segments	'
	Reporting Segments
	The Company's business is comprised of two reporting segments: Engine and Drivetrain. These segments are strategic business groups, which are managed separately as each represents a specific grouping of related automotive components and systems.
	The Company allocates resources to each segment based upon the projected after-tax return on invested capital ("ROIC") of its business initiatives. ROIC is comprised of Adjusted EBIT after deducting notional taxes compared to the projected average capital investment required. Adjusted EBIT is comprised of earnings before interest, income taxes and noncontrolling interest (“EBIT") adjusted for restructuring, goodwill impairment charges, affiliates' earnings and other items not reflective of on-going operating income or loss.
	Adjusted EBIT is the measure of segment income or loss used by the Company. The Company believes Adjusted EBIT is most reflective of the operational profitability or loss of our reporting segments. The following tables show segment information and Adjusted EBIT for the Company's reporting segments.
	Net Sales by Reporting Segment
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	(millions of dollars)	2014			2013			2014			2013
	Engine	$	1,412.40		$	1,210.30		$	4,322.00		$	3,756.10
	Drivetrain	627			604			2,016.40			1,818.90
	Inter-segment eliminations	(7.3		)	(8.1		)	(25.2		)	(23.8		)
	Net sales	$	2,032.10		$	1,806.20		$	6,313.20		$	5,551.20
	Adjusted Earnings Before Interest, Income Taxes and Noncontrolling Interest (“Adjusted EBIT”)
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	(millions of dollars)	2014			2013			2014			2013
	Engine	$	222.6		$	195.5		$	696		$	618.1
	Drivetrain	68			65.9			237.6			181.7
	Adjusted EBIT	290.6			261.4			933.6			799.8
	Restructuring expense	13.1			—			67.6			—
	Pension settlement	2.7			—			2.7			—
	Program termination agreement	—			—			—			11.3
	Retirement related obligations	—			—			—			5.9
	Corporate, including equity in affiliates' earnings and stock-based compensation	22.3			25.4			76			83.9
	Interest income	(1.4		)	(1.3		)	(4.3		)	(3.3		)
	Interest expense and finance charges	9			8.1			26.2			26.6
	Earnings before income taxes and noncontrolling interest	244.9			229.2			765.4			675.4
	Provision for income taxes	71.9			56.3			225.3			173.8
	Net earnings	173			172.9			540.1			501.6
	Net earnings attributable to the noncontrolling interest, net of tax	6.4			6.1			24.2			18.7
	Net earnings attributable to BorgWarner Inc.	$	166.6		$	166.8		$	515.9		$	482.9
	Total Assets
	(millions of dollars)	September 30,			31-Dec-13
		2014
	Engine	$	3,968.60		$	3,519.10
	Drivetrain	1,793.60			1,786.60
	Total	5,762.20			5,305.70
	Corporate (a)	1,520.10			1,611.30
	Total assets	$	7,282.30		$	6,917.00
	____________________________________
	(a)	Corporate assets include investments and advances and deferred income taxes.

Recent_Transactions

Recent Transactions	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
Recent Transactions	'
	Recent Transactions
	On February 28, 2014, the Company acquired 100% of the equity interests in Wahler. Wahler is a producer of exhaust gas recirculation ("EGR") valves, EGR tubes and thermostats, and has operations in Germany, Brazil, the U.S., China and Slovakia. The cash paid, net of cash acquired was $106.4 million (77.1 million Euro).
	The Wahler acquisition is expected to strengthen the Company's strategic position as a producer of complete EGR systems and create additional market opportunities in both passenger and commercial vehicle applications.
	The operating results and assets are reported within the Company's Engine reporting segment as of the date of the acquisition. The impact of Wahler is not expected to be material to 2014 consolidated revenues and earnings. The Company paid $106.4 million, which is recorded as an investing activity in the Company's Condensed Consolidated Statement of Cash Flows. Additionally, the Company assumed retirement-related liabilities of $3.2 million and assumed debt of $40.3 million, which are reflected in the supplemental cash flow information on the Company's Condensed Consolidated Statement of Cash Flows.
	The following table summarizes the aggregated estimated fair value of the assets acquired and liabilities assumed on February 28, 2014, the date of acquisition:
	(millions of dollars)
	Receivables, net	$	55.2
	Inventories, net	47.1
	Property, plant and equipment, net	55.3
	Goodwill	56.3
	Other intangible assets	42.7
	Other assets and liabilities	(32.5		)
	Accounts payable and accrued expenses	(74.2		)
	Total consideration, net of cash acquired	149.9
	Less: Assumed retirement-related liabilities	3.2
	Less: Assumed debt	40.3
	Cash paid, net of cash acquired	$	106.4
	In connection with the acquisition, the Company capitalized $24.9 million for customer relationships, $10.2 million for know-how, $4.1 million for patented technology and $3.5 million for the Wahler trade name. Customer relationships and know-how will be amortized over a period of up to 15 years, patented technology will be amortized over seven years and the Wahler trade name will not be amortized as it has an indefinite useful life. The income approach was used to determine the fair value of all intangible assets. Additionally, $22.4 million in goodwill is expected to be non-deductible for tax purposes.
	The Company is in the process of finalizing all purchase accounting adjustments related to the Wahler acquisition. The Company has recorded fair value adjustments based on new information obtained during the measurement period. These adjustments have resulted in an increase in goodwill of $9.0 million from the Company's initial estimate. Subsequent adjustments may be necessary based on the finalization of certain estimates, including additional fair value or working capital adjustments.

New_Accounting_Pronouncements_

New Accounting Pronouncements New Accounting Pronouncements	9 Months Ended
	Sep. 30, 2014
New Accounting Pronouncements [Abstract]	'
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	'
	(19) New Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board amended the Accounting Standards Codification to add Topic 606, "Revenue from Contracts with Customers," outlining a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and superseding most current revenue recognition guidance. This guidance is effective for interim and annual reporting periods beginning after December 15, 2016. The Company is currently evaluating the impact this guidance will have on its Consolidated Financial Statements.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Accounting	'
	The accompanying unaudited Condensed Consolidated Financial Statements of BorgWarner Inc. and Consolidated Subsidiaries (the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes necessary for a comprehensive presentation of financial position, results of operations and cash flow activity required by GAAP for complete financial statements. In the opinion of management, all normal recurring adjustments necessary for a fair presentation of results have been included. Operating results for the three and nine months ended September 30, 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014. The balance sheet as of December 31, 2013 was derived from the audited financial statements as of that date. For further information, refer to the Consolidated Financial Statements and Footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.
Use of Estimates	'
	Management makes estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and accompanying notes, as well as, the amounts of revenues and expenses reported during the periods covered by those financial statements and accompanying notes. Actual results could differ from these estimates.

Research_and_Development_Expen1

Research and Development Expenditures (Tables)	9 Months Ended
	Sep. 30, 2014
Research and Development [Abstract]	'
Gross and net expenditures on research and development ("R&D") activities	'
	The following table presents the Company’s gross and net expenditures on R&D activities:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	(millions of dollars)	2014			2013			2014			2013
	Gross R&D expenditures	$	96.1		$	84.7		$	292.1		$	250.9
	Customer reimbursements	(10.8		)	(12.9		)	(34.7		)	(34.7		)
	Net R&D expenditures	$	85.3		$	71.8		$	257.4		$	216.2

Other_Expense_Income_Net_Table

Other Expense (Income), Net (Tables)	9 Months Ended
	Sep. 30, 2014
Other Income and Expenses [Abstract]	'
Schedule of other expense	'
	Items included in other expense (income), net consist of:
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	(millions of dollars)	2014			2013			2014			2013
	Restructuring expense	$	13.1		$	—		$	67.6		$	—
	Pension settlement	2.7			—			2.7			—
	Program termination agreement	—			—			—			11.3
	Retirement related obligations	—			—			—			5.9
	Other income	(3.5		)	(3.7		)	(8.2		)	(6.4		)
	Other expense (income), net	$	12.3		$	(3.7	)	$	62.1		$	10.8

Inventories_net_Tables

Inventories, net (Tables)	9 Months Ended
	Sep. 30, 2014
Inventory Disclosure [Abstract]	'
Schedule of Inventory	'
	Inventories consisted of the following:
		September 30,			December 31,
	(millions of dollars)	2014			2013
	Raw material and supplies	$	322.3		$	279.8
	Work in progress	91.2			78
	Finished goods	136.5			116.3
	FIFO inventories	550			474.1
	LIFO reserve	(18.2		)	(16.0		)
	Inventories, net	$	531.8		$	458.1

Property_Plant_and_Equipment_n1

Property, Plant and Equipment, net (Tables)	9 Months Ended
	Sep. 30, 2014
Property, Plant and Equipment [Abstract]	'
Disclosure of Property, Plant and Equipment	'
		September 30,			December 31,
	(millions of dollars)	2014			2013
	Land, land use rights and buildings	$	799.6		$	753.9
	Machinery and equipment	1,953.30			1,897.50
	Capital leases	8.8			2.4
	Construction in progress	282.3			272.3
	Total property, plant and equipment, gross	3,044.00			2,926.10
	Less: accumulated depreciation	(1,101.0		)	(1,099.3		)
	Property, plant and equipment, net, excluding tooling	1,943.00			1,826.80
	Tooling, net of amortization	124.4			112.6
	Property, plant and equipment, net	$	2,067.40		$	1,939.40

Product_Warranty_Tables

Product Warranty (Tables)	9 Months Ended
	Sep. 30, 2014
Product Warranties Disclosures [Abstract]	'
Schedule of Product Warranty Liability	'
	The following table summarizes the activity in the product warranty accrual accounts:
	(millions of dollars)	2014			2013
	Beginning balance, January 1	$	72.7		$	64.9
	Provisions	27.7			29.1
	Acquisition(a)	22.8			—
	Payments	(32.4		)	(28.3		)
	Translation adjustment	(4.6		)	0.7
	Ending balance, September 30	$	86.2		$	66.4
	____________________________________
	(a)	The Company recorded a $12.4 million insurance receivable related to the $22.8 million liability, which is classified in the Condensed Consolidated Balance Sheet in Investments and advances.
	The product warranty liability is classified in the Condensed Consolidated Balance Sheets as follows:
		September 30,			December 31,
	(millions of dollars)	2014			2013
	Accounts payable and accrued expenses	$	27.7		$	38.4
	Other non-current liabilities	58.5			34.3
	Total product warranty liability	$	86.2		$	72.7

Notes_Payable_and_LongTerm_Deb1

Notes Payable and Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of Long-term Debt Instruments	'
	As of September 30, 2014 and December 31, 2013, the Company had short-term and long-term debt outstanding as follows:
		September 30,		December 31,
	(millions of dollars)	2014		2013
	Short-term debt
	Short-term borrowings	$	478	$	84.8
	Receivables securitization	110		110
	Total short-term debt	$	588	$	194.8
	Long-term debt
	5.75% Senior notes due 11/01/16 ($150 million par value)	$	149.7	$	149.7
	8.00% Senior notes due 10/01/19 ($134 million par value)	134		133.9
	4.625% Senior notes due 09/15/20 ($250 million par value)	248.4		248.2
	7.125% Senior notes due 02/15/29 ($121 million par value)	119.4		119.4
	Multi-currency revolving credit facility	—		320
	Term loan facilities and other	58.8		40.4
	Unamortized portion of debt derivatives	13.2		16.2
	Total long-term debt	723.5		1,027.80
	Less: current portion	17.7		6.8
	Long-term debt, net of current portion	$	705.8	$	1,021.00

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2014
Fair Value Disclosures [Abstract]	'
Assets and liabilities measured at fair value	'
	The following tables classify assets and liabilities measured at fair value on a recurring basis as of September 30, 2014 and December 31, 2013:
				Basis of fair value measurements
	(millions of dollars)	Balance at September 30, 2014		Quoted prices in active markets for identical items		Significant other observable inputs		Significant unobservable inputs		Valuation technique
				(Level 1)		(Level 2)		(Level 3)
	Assets:
	Foreign currency contracts	$	3.7	$	—	$	3.7	$	—	A
	Other non-current assets (insurance settlement agreement note receivable)	$	29.2	$	—	$	29.2	$	—	C
	Liabilities:
	Foreign currency contracts	$	1.4	$	—	$	1.4	$	—	A
	Net investment hedge contracts	$	9.5	$	—	$	9.5	$	—	A
				Basis of fair value measurements
	(millions of dollars)	Balance at		Quoted prices in active markets for identical items		Significant other observable inputs		Significant unobservable inputs		Valuation
		31-Dec-13		(Level 1)		(Level 2)		(Level 3)		technique
	Assets:
	Foreign currency contracts	$	3.4	$	—	$	3.4	$	—	A
	Other non-current assets (insurance settlement agreement note receivable)	$	35.6	$	—	$	35.6	$	—	C
	Liabilities:
	Foreign currency contracts	$	7.4	$	—	$	7.4	$	—	A
	Net investment hedge contracts	$	24.3	$	—	$	24.3	$	—	A

Financial_Instruments_Tables

Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2014
Derivative [Line Items]	'
Derivatives Instruments in Statements of Financial Position	'
	At September 30, 2014 and December 31, 2013, the following amounts were recorded in the Condensed Consolidated Balance Sheets as being payable to or receivable from counterparties under ASC Topic 815:
		Assets										Liabilities
	(millions of dollars)	Location		30-Sep-14				31-Dec-13				Location	30-Sep-14			31-Dec-13
	Foreign currency contracts	Prepayments and other current assets		$	3.2			$	3.4			Accounts payable and accrued expenses	$	1.3		$	7.4
		Other non-current assets		$	0.5			$	—			Other non-current liabilities	$	0.1		$	—
	Net investment hedge contracts	Other non-current assets		$	—			$	—			Other non-current liabilities	$	9.5		$	24.3
Deferred Losses Reported In Accumulated Other Comprehensive Income Loss	'
	The table below shows deferred gains (losses) reported in AOCI as well as the amount expected to be reclassified to income in one year or less. The amount expected to be reclassified to income in one year or less assumes no change in the current relationship of the hedged item at September 30, 2014 market rates.
	(millions of dollars)	Deferred gain (loss) in AOCI at								Gain (loss) expected to be reclassified to income in one year or less
	Contract Type	30-Sep-14				31-Dec-13
	Foreign currency	$	1.9			$	(3.7	)		$	1.5
	Net investment hedges	(10.8		)		(22.1		)		—
	Total	$	(8.9	)		$	(25.8	)		$	1.5
Derivatives Designated As Cash Flow Hedging Instruments	'
	Derivative instruments designated as hedging instruments as defined by ASC Topic 815 held during the period resulted in the following gains and losses recorded in income:
				Gain (loss) reclassified									Gain (loss)
				from AOCI to income									recognized in income
				(effective portion)									(ineffective portion)
	(millions of dollars)			Three Months Ended									Three Months Ended
	Contract Type	Location		30-Sep-14				30-Sep-13				Location	30-Sep-14			30-Sep-13
	Foreign currency	Sales		$	0.7			$	0.7			SG&A expense	$	0.1		$	—
	Foreign currency	Cost of goods sold		$	0.2			$	(4.1	)		SG&A expense	$	(0.1	)	$	(0.1	)
	Foreign currency	SG&A expense		$	(0.2	)		$	(0.1	)		SG&A expense	$	—		$	—
	Cross-currency swap	N/A										Interest expense	$	0.4		$	0.4
				Gain (loss) reclassified									Gain (loss)
				from AOCI to income									recognized in income
				(effective portion)									(ineffective portion)
	(millions of dollars)			Nine Months Ended									Nine Months Ended
	Contract Type	Location		30-Sep-14				30-Sep-13				Location	30-Sep-14			30-Sep-13
	Foreign currency	Sales		$	2			$	1.6			SG&A expense	$	0.2		$	0.2
	Foreign currency	Cost of goods sold		$	(1.6	)		$	(10.1	)		SG&A expense	$	(0.1	)	$	(0.8	)
	Foreign currency	SG&A expense		$	(0.6	)		$	(0.2	)		SG&A expense	$	—		$	—
	Cross-currency swap	N/A										Interest expense	$	1		$	0.1
Net Investment Hedge [Member]	'
Derivative [Line Items]	'
Notional Amounts of Outstanding Derivative Positions	'
	At September 30, 2014 and December 31, 2013, the following cross-currency swaps were outstanding:
	(in millions)	Cross-currency swaps
	As of September 30, 2014	Notional in				Notional in				Duration
		USD				local currency
	Floating $ to floating ¥	$	125			€	14,651.30			16-Nov
	(in millions)	Cross-currency swaps
	As of December 31, 2013	Notional in				Notional in				Duration
		USD				local currency
	Floating $ to floating €	$	75			€	58.5			19-Oct
	Floating $ to floating ¥	$	150			¥	17,581.50			16-Nov
Foreign currency contracts	'
Derivative [Line Items]	'
Notional Amounts of Outstanding Derivative Positions	'
	At September 30, 2014 and December 31, 2013, the following foreign currency derivative contracts were outstanding:
	Foreign currency derivatives (in millions)
	Functional currency	Traded currency		Notional in traded currency			Notional in traded currency			Duration
				30-Sep-14			31-Dec-13
	Brazilian real	US dollar		4.8			19.3			14-Dec
	Chinese yuan	Japanese yen		—			215			14-Feb
	Chinese yuan	US dollar		3.3			12.3			14-Dec
	Euro	British pound		0.7			3			14-Dec
	Euro	Hungarian forint		1,587.80			6,430.50			14-Dec
	Euro	Japanese yen		1,380.20			5,830.70			14-Dec
	Euro	Korean won		—			663.1			14-Jul
	Euro	Polish zloty		22.8			96			14-Dec
	Euro	US dollar		12.8			29.4			15-Dec
	Hungarian forint	Euro		1.6			6.6			14-Dec
	Japanese yen	Chinese yuan		110.9			84			15-Dec
	Japanese yen	Korean won		8,508.70			5,715.50			15-Dec
	Japanese yen	US dollar		4.8			4.2			15-Dec
	Korean won	Euro		8			23.6			15-Dec
	Korean won	Japanese yen		115			380.5			14-Dec
	Korean won	US dollar		25.8			—			15-Dec
	Mexican peso	US dollar		3.8			—			14-Dec
	Swedish krona	Euro		9.7			33.7			14-Dec
	US dollar	Japanese yen		3,000.00			3,209.30			14-Dec

Retirement_Benefit_Plans_Table

Retirement Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Schedule of Net Benefit Costs	'
	The components of net periodic benefit cost recorded in the Condensed Consolidated Statements of Operations are as follows:
		Pension benefits												Other post-
														retirement benefits
	(millions of dollars)	2014						2013						2014			2013
	Three Months Ended September 30,	US			Non-US			US			Non-US
	Service cost	$	—		$	3.3		$	—		$	3.1		$	0.1		$	0.1
	Interest cost	2.9			4.5			2.9			4.2			1.6			1.7
	Expected return on plan assets	(4.4		)	(5.3		)	(4.6		)	(2.8		)	—			—
	Settlement	2.7			—			—			—			—			—
	Amortization of unrecognized prior service benefit	(0.2		)	—			(0.2		)	—			(1.5		)	(1.6		)
	Amortization of unrecognized loss	1.6			1.1			2.1			1.3			0.7			1.2
	Net periodic benefit cost	$	2.6		$	3.6		$	0.2		$	5.8		$	0.9		$	1.4
		Pension benefits												Other post-
														retirement benefits
	(millions of dollars)	2014						2013						2014			2013
	Nine Months Ended September 30,	US			Non-US			US			Non-US
	Service cost	$	—		$	9.8		$	—		$	9.3		$	0.2		$	0.3
	Interest cost	9.1			13.8			8.7			12.4			5			5.1
	Expected return on plan assets	(13.2		)	(16.1		)	(13.7		)	(8.2		)	—			—
	Settlement	2.7			—			—			—			—			—
	Amortization of unrecognized prior service benefit	(0.6		)	—			(0.6		)	—			(4.7		)	(4.8		)
	Amortization of unrecognized loss	4.9			3.6			6.2			3.9			2			3.7
	Net periodic benefit cost	$	2.9		$	11.1		$	0.6		$	17.4		$	2.5		$	4.3

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock Options Activity	'
	Stock options A summary of the Company’s stock option activity for the nine months ended September 30, 2014 is as follows:
		Shares under option		Weighted average exercise price		Weighted average remaining contractual life	Aggregate intrinsic value
		(thousands)				(in years)	(in millions)
	Outstanding and exercisable at December 31, 2013	1,997		$	15.82	2.6	$	80
	Exercised	(54	)	$	14.41
	Outstanding and exercisable at March 31, 2014	1,943		$	15.86	2.4	$	88.6
	Exercised	(101	)	$	14.03
	Outstanding and exercisable at June 30, 2014	1,842		$	15.96	2.2	$	90.7
	Exercised	(114	)	$	13.73
	Outstanding and exercisable at September 30, 2014	1,728		$	16.1	1.9	$	63.1
Nonvested Restricted Stock Activity	'
	A summary of the Company’s nonvested restricted stock for the nine months ended September 30, 2014 is as follows:
		Shares subject to restriction		Weighted average price
		(thousands)
	Nonvested at December 31, 2013	1,411		$	37.86
	Granted	420		$	53.9
	Vested	(498	)	$	37.38
	Forfeited	(16	)	$	39.54
	Nonvested at March 31, 2014	1,317		$	43.08
	Granted	22		$	62.04
	Vested	(31	)	$	37.84
	Forfeited	(15	)	$	41.77
	Nonvested at June 30, 2014	1,293		$	43.54
	Granted	3		$	62.14
	Vested	(1	)	$	35.95
	Forfeited	(15	)	$	42.85
	Nonvested at September 30, 2014	1,280		$	43.6

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Abstract]	'
Schedule of accumulated other comprehensive income (loss)	'
	(millions of dollars)	Foreign currency translation adjustments			Hedge instruments			Defined benefit postretirement plans			Other			Total
	Beginning Balance, December 31, 2013	$	181.1		$	(16.0	)	$	(181.5	)	$	2.4		$	(14.0	)
	Comprehensive loss before reclassifications	(199.9		)	16.7			—			(0.1		)	(183.3		)
	Income taxes associated with comprehensive income (loss) before reclassifications	—			(5.7		)	—			—			(5.7		)
	Reclassification from accumulated other comprehensive income	—			0.2			5.2			—			5.4
	Income taxes reclassified into net earnings	—			0.1			(2.4		)	—			(2.3		)
	Ending Balance September 30, 2014	$	(18.8	)	$	(4.7	)	$	(178.7	)	$	2.3		$	(199.9	)
	(millions of dollars)	Foreign currency translation adjustments			Hedge instruments			Defined benefit postretirement plans			Other			Total
	Beginning Balance, December 31, 2012	$	140.8		$	(37.2	)	$	(225.8	)	$	0.9		$	(121.3	)
	Comprehensive loss before reclassifications	4.7			12.1			1.4			0.5			18.7
	Income taxes associated with comprehensive loss before reclassifications	—			(8.5		)	—			—			(8.5		)
	Reclassification from accumulated other comprehensive income	—			8.7			8.4			—			17.1
	Income taxes reclassified into net earnings	—			1.7			1.3			—			3
	Ending Balance September 30, 2013	$	145.5		$	(23.2	)	$	(214.7	)	$	1.4		$	(91.0	)

Contingencies_Tables

Contingencies (Tables)	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Estimated future settlement of existing claims	'
	(millions of dollars)	September 30,		December 31, 2013
		2014
	Assets:
	Other non-current assets	$	111.8	$	96.7
	Total insurance assets	$	111.8	$	96.7
	Liabilities:
	Accounts payable and accrued expenses	$	46.8	$	41.1
	Other non-current liabilities	65		55.6
	Total accrued liabilities	$	111.8	$	96.7

Restructuring_Tables

Restructuring (Tables)	9 Months Ended
	Sep. 30, 2014
Restructuring and Related Activities [Abstract]	'
Schedule of employee related and other restructuring accruals	'
		Employee Related Accruals
	(millions of dollars)	Drivetrain			Engine			Total
	Balance at December 31, 2013	$	8.4		$	2.8		$	11.2
	Provision	32.1			0.7			32.8
	Cash payments	(1.2		)	(1.6		)	(2.8		)
	Translation adjustment	—			—			—
	Balance at March 31, 2014	$	39.3		$	1.9		$	41.2
	Provision	6.4			3.6			10
	Cash payments	(2.7		)	(3.9		)	(6.6		)
	Translation adjustment	(0.2		)	—			(0.2		)
	Balance at June 30, 2014	$	42.8		$	1.6		$	44.4
	Provision	5.3			2.2			7.5
	Cash payments	(1.1		)	(1.4		)	(2.5		)
	Translation adjustment	(3.2		)	(0.2		)	(3.4		)
	Balance at September 30, 2014	$	43.8		$	2.2		$	46

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of Earnings Per Share Reconciliation	'
	The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share of common stock:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	(in millions, except per share amounts)	2014		2013		2014		2013
	Basic earnings per share:
	Net earnings attributable to BorgWarner Inc.	$	166.6	$	166.8	$	515.9	$	482.9
	Weighted average shares of common stock outstanding	227.077		227.638		227.395		229.168
	Basic earnings per share of common stock	$	0.73	$	0.73	$	2.27	$	2.11
	Diluted earnings per share:
	Net earnings attributable to BorgWarner Inc.	$	166.6	$	166.8	$	515.9	$	482.9
	Weighted average shares of common stock outstanding	227.077		227.638		227.395		229.168
	Effect of stock-based compensation	1.591		2.838		1.827		2.768
	Weighted average shares of common stock outstanding including dilutive shares	228.668		230.476		229.222		231.936
	Diluted earnings per share of common stock	$	0.73	$	0.72	$	2.25	$	2.08

Reporting_Segments_Tables

Reporting Segments (Tables)	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Net Sales by Reporting Segment	'
	Net Sales by Reporting Segment
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	(millions of dollars)	2014			2013			2014			2013
	Engine	$	1,412.40		$	1,210.30		$	4,322.00		$	3,756.10
	Drivetrain	627			604			2,016.40			1,818.90
	Inter-segment eliminations	(7.3		)	(8.1		)	(25.2		)	(23.8		)
	Net sales	$	2,032.10		$	1,806.20		$	6,313.20		$	5,551.20
Segment Earnings Before Interest and Income Taxes	'
	Adjusted Earnings Before Interest, Income Taxes and Noncontrolling Interest (“Adjusted EBIT”)
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	(millions of dollars)	2014			2013			2014			2013
	Engine	$	222.6		$	195.5		$	696		$	618.1
	Drivetrain	68			65.9			237.6			181.7
	Adjusted EBIT	290.6			261.4			933.6			799.8
	Restructuring expense	13.1			—			67.6			—
	Pension settlement	2.7			—			2.7			—
	Program termination agreement	—			—			—			11.3
	Retirement related obligations	—			—			—			5.9
	Corporate, including equity in affiliates' earnings and stock-based compensation	22.3			25.4			76			83.9
	Interest income	(1.4		)	(1.3		)	(4.3		)	(3.3		)
	Interest expense and finance charges	9			8.1			26.2			26.6
	Earnings before income taxes and noncontrolling interest	244.9			229.2			765.4			675.4
	Provision for income taxes	71.9			56.3			225.3			173.8
	Net earnings	173			172.9			540.1			501.6
	Net earnings attributable to the noncontrolling interest, net of tax	6.4			6.1			24.2			18.7
	Net earnings attributable to BorgWarner Inc.	$	166.6		$	166.8		$	515.9		$	482.9
Segment assets	'
	Total Assets
	(millions of dollars)	September 30,			31-Dec-13
		2014
	Engine	$	3,968.60		$	3,519.10
	Drivetrain	1,793.60			1,786.60
	Total	5,762.20			5,305.70
	Corporate (a)	1,520.10			1,611.30
	Total assets	$	7,282.30		$	6,917.00
	____________________________________
	(a)	Corporate assets include investments and advances and deferred income taxes.

Recent_Transactions_Tables

Recent Transactions (Tables)	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
Schedule of aggregated estimated fair value of assets acquired and liabilities assumed	'
	The following table summarizes the aggregated estimated fair value of the assets acquired and liabilities assumed on February 28, 2014, the date of acquisition:
	(millions of dollars)
	Receivables, net	$	55.2
	Inventories, net	47.1
	Property, plant and equipment, net	55.3
	Goodwill	56.3
	Other intangible assets	42.7
	Other assets and liabilities	(32.5		)
	Accounts payable and accrued expenses	(74.2		)
	Total consideration, net of cash acquired	149.9
	Less: Assumed retirement-related liabilities	3.2
	Less: Assumed debt	40.3
	Cash paid, net of cash acquired	$	106.4

Basis_of_Presentation_Details

Basis of Presentation (Details)	0 Months Ended
	Dec. 16, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Stock split ratio	2

Research_and_Development_Expen2

Research and Development Expenditures (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Research and Development	'	'	'	'
Gross R&D expenditures	$96.10	$84.70	$292.10	$250.90
Customer reimbursements	-10.8	-12.9	-34.7	-34.7
Net R&D expenditures	$85.30	$71.80	$257.40	$216.20
Maximum value of R&D contract	5.00%	5.00%	5.00%	5.00%

Other_Expense_Income_Net_Detai

Other Expense (Income), Net (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Restructuring expense	$13.10	$0	$67.60	$0
Program termination agreement	0	0	0	11.3
Retirement related obligations	0	0	0	5.9
Other income	-3.5	-3.7	-8.2	-6.4
Other expense	12.3	-3.7	62.1	10.8
United States Pension Plan of US Entity [Member]	'	'	'	'
Pension settlement	$2.70	$0	$2.70	$0

Income_Taxes_Details

Income Taxes (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'	'
Effective income tax rate, continuing operations	29.40%	25.70%
Tax benefits related to restructuring expense	$11.90	'
Other Tax Expense (Benefit)	0.9	3.1
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	'	2.5
Tax benefit of project termination settlement	'	3.8
Tax benefit associated with retirement obligations	'	2.1
Other Tax Adjustments	'	7.3
Tax benefit of research and development and international tax credit extensions	'	6.6
Tax impact of other tax adjustments	'	$4.90

Inventories_net_Details

Inventories, net (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Raw material and supplies	$322.30	$279.80
Work in progress	91.2	78
Finished goods	136.5	116.3
FIFO inventories	550	474.1
LIFO reserve	-18.2	-16
Inventories, net	$531.80	$458.10

Property_Plant_and_Equipment_n2

Property, Plant and Equipment, net (Details) (USD $)	9 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Property, Plant and Equipment [Line Items]	'	'	'
Capital Expenditures Incurred but Not yet Paid	$46.90	'	$62.80
Capitalized interest costs	10.5	8.5	'
Property Plant and Equipment	'	'	'
Total property, plant and equipment, gross	3,044	'	2,926.10
Less: accumulated depreciation	-1,101	'	-1,099.30
Property, plant and equipment, net, excluding tooling	1,943	'	1,826.80
Tooling, net of amortization	124.4	'	112.6
Property, plant and equipment, net	2,067.40	'	1,939.40
Land, land use rights and buildings [Member]	'	'	'
Property Plant and Equipment	'	'	'
Total property, plant and equipment, gross	799.6	'	753.9
Machinery and equipment [Member]	'	'	'
Property Plant and Equipment	'	'	'
Total property, plant and equipment, gross	1,953.30	'	1,897.50
Capital leases [Member]	'	'	'
Property Plant and Equipment	'	'	'
Total property, plant and equipment, gross	8.8	'	2.4
Construction in progress [Member]	'	'	'
Property Plant and Equipment	'	'	'
Total property, plant and equipment, gross	$282.30	'	$272.30

Product_Warranty_Details

Product Warranty (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Product warranty rollforward	'		'		'
Beginning balance, January 1	$72.70		$64.90		'
Provisions	27.7		29.1		'
Acquisition	22.8	[1]	0	[1]	'
Payments	-32.4		-28.3		'
Translation adjustment	-4.6		0.7		'
Ending balance, September 30	86.2		66.4		'
Insurance receivable related to liability	12.4		'		'
Product warranty liability	'		'		'
Accounts payable and accrued expenses	27.7		'		38.4
Other non-current liabilities	58.5		'		34.3
Total product warranty liability	$86.20		$66.40		'
Minimum warranty term (in years)	'1 year		'		'
Maximum warranty term (in years)	'3 years		'		'
[1]	The Company recorded a $12.4 million insurance receivable related to the $22.8 million liability, which is classified in the Condensed Consolidated Balance Sheet in Investments and advances.

Notes_Payable_and_LongTerm_Deb2

Notes Payable and Long-Term Debt (Details) (USD $)

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Mar. 12, 2014

Short Term Borrowings [Member]

Short Term Borrowings [Member]

Receivables Securitization [Member]

Receivables Securitization [Member]

Total Short Term Debt [Member]

Total Short Term Debt [Member]

5.75% Senior Notes [Member]

5.75% Senior Notes [Member]

8.00% Senior Notes [Member]

8.00% Senior Notes [Member]

4.625% Senior Notes [Member]

4.625% Senior Notes [Member]

7.125% Senior Notes [Member]

7.125% Senior Notes [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Term Loan Facilities And Other [Member]

Term Loan Facilities And Other [Member]

Unamortized portion of debt derivative [Member]

Unamortized portion of debt derivative [Member]

Commercial Paper [Member]

Commercial Paper [Member]

Short-term debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Short-term borrowings

'

'

$478,000,000

$84,800,000

$110,000,000

$110,000,000

$588,000,000

$194,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt

723,500,000

1,027,800,000

'

'

'

'

'

'

149,700,000

149,700,000

134,000,000

133,900,000

248,400,000

248,200,000

119,400,000

119,400,000

0

'

320,000,000

58,800,000

40,400,000

13,200,000

16,200,000

355,000,000

'

Current portion of long-term debt

17,700,000

6,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, net of current portion

705,800,000

1,021,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument par value

'

'

'

'

'

'

'

'

150,000,000

'

134,000,000

'

250,000,000

'

121,000,000

'

'

'

'

'

'

'

'

'

'

Debt instrument stated interest rate

'

'

'

'

'

'

'

'

5.75%

'

8.00%

'

4.63%

'

7.13%

'

'

'

'

'

'

'

'

'

'

Debt instrument maturity date

'

'

'

'

'

'

'

'

1-Nov-16

'

1-Oct-19

'

15-Sep-20

'

15-Feb-29

'

'

'

'

'

'

'

'

'

'

Debt weighted average interest rate

3.30%

3.70%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Current borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000,000

750,000,000

'

'

'

'

'

'

1,000,000,000

Maximum borrowing capacity

1,250,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000,000

'

'

'

'

'

'

'

'

Estimated fair value of senior unsecured notes

749,100,000

729,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair value higher than carrying value for senior unsecured notes

97,600,000

78,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Letters of Credit Outstanding, Amount

$29,200,000

$27,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Market Approach Valuation Technique [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Assets:	'	'
Foreign currency contracts	$0	$0
Liabilities:	'	'
Foreign currency contracts	0	0
Net investment hedge contracts	0	0
Market Approach Valuation Technique [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Assets:	'	'
Foreign currency contracts	3.7	3.4
Liabilities:	'	'
Foreign currency contracts	1.4	7.4
Net investment hedge contracts	9.5	24.3
Market Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Assets:	'	'
Foreign currency contracts	0	0
Liabilities:	'	'
Foreign currency contracts	0	0
Net investment hedge contracts	0	0
Market Approach Valuation Technique [Member] | Estimate of Fair Value Measurement [Member]	'	'
Assets:	'	'
Foreign currency contracts	3.7	3.4
Liabilities:	'	'
Foreign currency contracts	1.4	7.4
Net investment hedge contracts	9.5	24.3
Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Assets:	'	'
Other non-current assets (insurance settlement agreement note receivable)	0	0
Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Assets:	'	'
Other non-current assets (insurance settlement agreement note receivable)	29.2	35.6
Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Assets:	'	'
Other non-current assets (insurance settlement agreement note receivable)	0	0
Income Approach Valuation Technique [Member] | Estimate of Fair Value Measurement [Member]	'	'
Assets:	'	'
Other non-current assets (insurance settlement agreement note receivable)	$29.20	$35.60

Financial_Instruments_Details

Financial Instruments (Details) (Net investment hedge contracts)	Dec. 31, 2013	Dec. 31, 2013	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2013
In Millions, unless otherwise specified	Maturity October 2019	Maturity October 2019	Maturity November 2016	Maturity November 2016	Maturity November 2016	Maturity November 2016
	USD ($)	EUR (€)	USD ($)	JPY (¥)	USD ($)	JPY (¥)
Derivative [Line Items]	'	'	'	'	'	'
Notional amount of cross currency swaps	$75	€ 58.50	$125	¥ 14,651.3	$150	¥ 17,581.5

Financial_Instruments_Foreign_

Financial Instruments - Foreign Currency Derivatives (Details) (Foreign currency contracts)

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

In Millions, unless otherwise specified

Brazil real

Brazil real

Chinese yuan

Chinese yuan

Chinese yuan

Chinese yuan

Euro

Euro

Euro

Euro

Euro

Euro

Euro

Euro

Euro

Euro

Euro

Euro

Hungarian forint

Hungarian forint

Japanese yen

Japanese yen

Japanese yen

Japanese yen

Japanese yen

Japanese yen

Korean won

Korean won

Korean won

Korean won

Korean won

Korean won

Mexican peso

Mexican peso

Swedish krona

Swedish krona

US dollar

US dollar

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity February 2014

Maturity February 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity July 2014

Maturity July 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity August 2014

Maturity August 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity December 2014

Maturity September 2014

Maturity September 2014

USD ($)

USD ($)

USD ($)

USD ($)

JPY (¥)

JPY (¥)

USD ($)

GBP (£)

HUF

JPY (¥)

PLN

USD ($)

GBP (£)

HUF

JPY (¥)

PLN

KRW

KRW

EUR (€)

EUR (€)

USD ($)

CNY

KRW

USD ($)

CNY

KRW

USD ($)

EUR (€)

USD ($)

EUR (€)

JPY (¥)

JPY (¥)

USD ($)

USD ($)

EUR (€)

EUR (€)

JPY (¥)

JPY (¥)

Derivative [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notional amount of currency derivatives

$4.80

$19.30

$3.30

$12.30

¥ 0

¥ 215

$12.80

£ 0.7

1,587.80

¥ 1,380.2

22.8

$29.40

£ 3

6,430.50

¥ 5,830.7

96

0

663.1

€ 1.60

€ 6.60

$4.80

110.9

8,508.70

$4.20

84

5,715.50

$25.80

€ 8

$0

€ 23.60

¥ 115

¥ 380.5

$3.80

$0

€ 9.70

€ 33.70

¥ 3,000

¥ 3,209.3

Financial_Instruments_Balance_

Financial Instruments - Balance Sheet (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Foreign currency contracts | Prepayments and other current assets	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative assets	$3.20	$3.40
Foreign currency contracts | Other non-current assets	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative assets	0.5	0
Foreign currency contracts | Accounts payable and accrued expenses	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative liabilities	1.3	7.4
Foreign currency contracts | Other non-current liabilities	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative liabilities	0.1	0
Net investment hedge contracts | Other non-current assets	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative assets	0	0
Net investment hedge contracts | Other non-current liabilities	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative liabilities	$9.50	$24.30

Financial_Instruments_Income_S

Financial Instruments - Income Statement (Details) (USD $)

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Foreign currency contracts

Net investment hedge contracts

Net investment hedge contracts

Net investment hedge contracts

Net investment hedge contracts

Net investment hedge contracts

Net investment hedge contracts

Sales

Sales

Sales

Sales

Cost of goods sold

Cost of goods sold

Cost of goods sold

Cost of goods sold

SG&A expense

SG&A expense

SG&A expense

SG&A expense

SG&A expense

SG&A expense

SG&A expense

SG&A expense

SG&A expense

SG&A expense

SG&A expense

SG&A expense

Interest expense

Interest expense

Interest expense

Interest expense

Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income, Effective Portion, Net [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax

($8.90)

($25.80)

$1.90

($3.70)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

($10.80)

($22.10)

'

'

'

'

Gain (loss) expected to be reclassified in one year or less

1.5

'

1.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

Derivatives Designated As Net Investment Hedges Under Topic 815 Abstract

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gain (loss) reclassified from accumulated OCI into net income, effective portion, net

'

'

'

'

0.7

0.7

-1.6

1.6

0.2

-4.1

-0.6

-10.1

-0.2

-0.1

'

-0.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gain (loss) recognized in net income, ineffective portion and amount excluded from effectiveness testing, net

'

'

'

'

'

'

'

'

'

'

'

'

$0.10

$0

$0.20

$0.20

($0.10)

($0.10)

($0.10)

($0.80)

$0

$0

$0

$0

'

'

$0.40

$0.40

$1

$0.10

Retirement_Benefit_Plans_Detai

Retirement Benefit Plans (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Actual contribution to defined benefit pension plans	'	'	$14.50	'
United States Pension Plan of US Entity [Member]	'	'	'	'
Components of net periodic benefit cost:	'	'	'	'
Service cost	0	0	0	0
Interest cost	2.9	2.9	9.1	8.7
Expected return on plan assets	-4.4	-4.6	-13.2	-13.7
Pension settlement	2.7	0	2.7	0
Amortization of unrecognized prior service benefit	-0.2	-0.2	-0.6	-0.6
Amortization of unrecognized loss	1.6	2.1	4.9	6.2
Net periodic benefit cost	2.6	0.2	2.9	0.6
Foreign Pension Plan [Member]	'	'	'	'
Components of net periodic benefit cost:	'	'	'	'
Service cost	3.3	3.1	9.8	9.3
Interest cost	4.5	4.2	13.8	12.4
Expected return on plan assets	-5.3	-2.8	-16.1	-8.2
Pension settlement	0	0	0	0
Amortization of unrecognized prior service benefit	0	0	0	0
Amortization of unrecognized loss	1.1	1.3	3.6	3.9
Net periodic benefit cost	3.6	5.8	11.1	17.4
Other Postretirement Benefit Plan [Member]	'	'	'	'
Components of net periodic benefit cost:	'	'	'	'
Service cost	0.1	0.1	0.2	0.3
Interest cost	1.6	1.7	5	5.1
Expected return on plan assets	0	0	0	0
Pension settlement	0	0	0	0
Amortization of unrecognized prior service benefit	-1.5	-1.6	-4.7	-4.8
Amortization of unrecognized loss	0.7	1.2	2	3.7
Net periodic benefit cost	0.9	1.4	2.5	4.3
Minimum [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	'	'	15	'
Maximum [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	'	'	$25	'

Stock_Based_Compensation_Detai

Stock Based Compensation (Details) (USD $)

3 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

In Millions, except Share data, unless otherwise specified

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Mar. 31, 2013

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Stock Incentive Plan 2004 [Member]

Stock Incentive Plan 2004 [Member]

2014 Stock Incentive Plan [Member]

2014 Stock Incentive Plan [Member]

First Half Vested

Second Half Vested

Retiring named executive officers [Member]

Stock Option [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Vesting period

'

'

'

'

'

'

'

'

'3 years

'

'

'

'2 years

'3 years

'

Term of award

'

'

'

'

'

'

'

'

'10 years

'

'

'

'

'

'

Percent of awards vested

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

'

Number of shares available for grant

'

'

'

'

'

'

'

'

'

'

8,000,000

'

'

'

'

Number of shares authorized

'

'

'

'

'

'

'

'

'

'

8,000,000

'

'

'

'

Options Roll Forward

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares outstanding under option, Beginning Balance

1,842,000

1,943,000

1,997,000

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average exercise price, Beginning Balance

$15.96

$15.86

$15.82

'

'

'

'

'

'

'

'

'

'

'

'

Shares outstanding under option, Exercised

-114,000

-101,000

-54,000

'

'

'

'

'

'

'

'

'

'

'

'

Shares outstanding under option, Exercised, Weighted average exercise price

$13.73

$14.03

$14.41

'

'

'

'

'

'

'

'

'

'

'

'

Shares outstanding under option, Ending Balance

1,728,000

1,842,000

1,943,000

1,997,000

'

'

'

'

'

'

'

'

'

'

'

Weighted average exercise price, Ending Balance

$16.10

$15.96

$15.86

$15.82

'

'

'

'

'

'

'

'

'

'

'

Weighted average remaining contractual term

'1 year 11 months

'2 years 2 months

'2 years 5 months

'2 years 7 months

'

'

'

'

'

'

'

'

'

'

'

Aggregate intrinsic value, outstanding

$63.10

$90.70

$88.60

$80

'

'

'

'

'

'

'

'

'

'

'

Restricted stock compensation expense

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted stock compensation expense

'

'

'

'

$5.40

$4.90

$15.30

$20.80

'

'

'

'

'

'

$5.50

Status of nonvested restricted stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Nonvested shares subject to restriction, Beginning Balance

1,293,000

1,317,000

1,411,000

'

'

'

'

'

'

'

'

'

'

'

'

Nonvested shares subject to restriction, weighted average exercise price

$43.54

$43.08

$37.86

'

'

'

'

'

'

'

'

'

'

'

'

Restricted shares granted to employees

3,000

22,000

420,000

'

'

'

'

'

'

426,150

'

18,730

'

'

'

Granted shares subject to restriction, weighted average exercise price

$62.14

$62.04

$53.90

'

'

'

'

'

'

'

'

'

'

'

'

Shares subject to restriction, Vested

-1,000

-31,000

-498,000

'

'

'

'

'

'

'

'

'

'

'

'

Vested shares subject to restriction, weighted average exercise price

$35.95

$37.84

$37.38

'

'

'

'

'

'

'

'

'

'

'

'

Shares subject to restriction, Forfeited

-15,000

-15,000

-16,000

'

'

'

'

'

'

'

'

'

'

'

'

Forfeited shares subject to restriction, weighted average exercise price

$42.85

$41.77

$39.54

'

'

'

'

'

'

'

'

'

'

'

'

Nonvested shares subject to restriction, Ending Balance

1,280,000

1,293,000

1,317,000

1,411,000

'

'

'

'

'

'

'

'

'

'

'

Nonvested shares subject to restriction, weighted average exercise price

$43.60

$43.54

$43.08

$37.86

'

'

'

'

'

'

'

'

'

'

'

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Foreign currency translation adjustments	'	'
Beginning Balance	$181.10	$140.80
Comprehensive income (loss) before reclassifications	-199.9	4.7
Income taxes associated with comprehensive income (loss) before reclassifications	0	0
Reclassification from accumulated other comprehensive income (loss)	0	0
Income taxes reclassified into net earnings	0	0
Ending Balance	-18.8	145.5
Hedge instruments	'	'
Beginning Balance	-16	-37.2
Comprehensive income (loss) before reclassifications	16.7	12.1
Income taxes associated with comprehensive income (loss) before reclassifications	-5.7	-8.5
Reclassification from accumulated other comprehensive income (loss)	0.2	8.7
Income taxes reclassified into net earnings	0.1	1.7
Ending Balance	-4.7	-23.2
Defined benefit postretirement plans	'	'
Beginning Balance	-181.5	-225.8
Comprehensive income (loss) before reclassifications	0	1.4
Income taxes associated with comprehensive income (loss) before reclassifications	0	0
Reclassification from accumulated other comprehensive income (loss)	5.2	8.4
Income taxes reclassified into net earnings	-2.4	1.3
Ending Balance	-178.7	-214.7
Other	'	'
Beginning Balance	2.4	0.9
Comprehensive income (loss) before reclassifications	-0.1	0.5
Income taxes associated with comprehensive income (loss) before reclassifications	0	0
Reclassification from accumulated other comprehensive income (loss)	0	0
Income taxes reclassified into net earnings	0	0
Ending Balance	2.3	1.4
Total	'	'
Beginning Balance	-14	-121.3
Comprehensive income (loss) before reclassifications	-183.3	18.7
Income taxes associated with comprehensive income (loss) before reclassifications	-5.7	-8.5
Reclassification from accumulated other comprehensive income (loss)	5.4	17.1
Income taxes reclassified into net earnings	-2.3	3
Ending Balance	($199.90)	($91)

Contingencies_Details

Contingencies (Details) (USD $)	9 Months Ended	12 Months Ended		1 Months Ended	9 Months Ended	12 Months Ended	1 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2008	Dec. 31, 2013	Aug. 31, 2013	Sep. 30, 2014	Dec. 31, 2013	Aug. 31, 2013
	site			Asbestos Issue [Member]	Asbestos Issue [Member]	Asbestos Issue [Member]	Non-Compensatory Damages [Member]
					claim	claim
Accrual for environmental loss contingencies [Abstract]	'	'	'	'	'	'	'
Waste disposal sites with potential liability under the Comprehensive Environmental Response, Compensation and Liability Act	27	'	'	'	'	'	'
Accrual for indicated environmental liabilities	$6.80	'	$4	'	'	'	'
Timeframe most environmental liabilities will be paid out	'5	'	'	'	'	'	'
Contingencies [Abstract]	'	'	'	'	'	'	'
Loss as a result of the September 2008 DTP ruling	'	4	'	'	'	'	'
Number of pending claims	'	'	'	'	18,000	17,000	'
Loss Contingency, Claims Settled and Dismissed, Number	'	'	'	'	1,500	1,500	'
Payment being made to a claimant by or on behalf of the company	'	'	'	'	299	297	'
Payment being made to a claimant by or on behalf of the company, percentage	'	'	'	'	20.00%	20.00%	'
Damages awarded	'	'	'	35	'	'	32.5
Surety bond related to appeal	'	'	'	55	'	'	'
Company paid in defense and indemnity in advance of insurers reimbursement	'	'	'	'	323.7	'	'
Cash and notes received from insurers	'	'	'	'	124.9	'	'
Outstanding balance to be fully recovered	'	'	'	'	198.8	153.6	'
Outstanding balance expected to be recovered in the next twelve months	'	'	'	'	75	'	'
Assets:	'	'	'	'	'	'	'
Other non-current assets	'	'	'	'	111.8	96.7	'
Total insurance assets	'	'	'	'	111.8	96.7	'
Liabilities:	'	'	'	'	'	'	'
Accounts payable and accrued expenses	'	'	'	'	46.8	41.1	'
Other non-current liabilities	'	'	'	'	65	55.6	'
Total accrued liabilities	'	'	'	'	$111.80	$96.70	'

Restructuring_Details

Restructuring (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Feb. 28, 2014

labor_union

Employee Severance [Member]

Employee Severance [Member]

Employee Severance [Member]

Employee Severance [Member]

Employee Severance [Member]

Employee Severance [Member]

Employee Severance [Member]

Employee Severance [Member]

Employee Severance [Member]

Corporate and Other [Member]

Corporate and Other [Member]

Wahler

Wahler

Drivetrain [Member]

Drivetrain [Member]

Drivetrain [Member]

Wahler

Drivetrain [Member]

Drivetrain [Member]

Drivetrain [Member]

Engine [Member]

Engine [Member]

Engine [Member]

employee

employee

Employee Severance [Member]

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Finalization of severance agreements, number of labor unions

'

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employee termination costs, number of employees

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

80

'

350

'

'

Employee termination benefits

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$2.20

$5.30

$5.30

$43.80

'

'

Other expense

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.1

8.4

'

'

Expected employee termination benefit costs to be incurred

15

'

15

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity interest acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

Expected employee termination benefit costs to be incurred, period of recognition

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'2 years

'

Restructuring Reserve [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Beginning Balance

'

'

'

'

44.4

41.2

11.2

42.8

39.3

8.4

1.6

1.9

2.8

'

'

'

'

'

'

'

'

Provision

13.1

0

67.6

0

7.5

10

32.8

5.3

6.4

32.1

2.2

3.6

0.7

3.5

6.6

'

'

7.4

52.2

'

'

Cash payments

'

'

'

'

-2.5

-6.6

-2.8

-1.1

-2.7

-1.2

-1.4

-3.9

-1.6

'

'

'

'

'

'

'

'

Translation adjustment

'

'

'

'

-3.4

-0.2

0

-3.2

-0.2

0

-0.2

0

0

'

'

'

'

'

'

'

'

Ending Balance

'

'

'

'

$46

$44.40

$41.20

$43.80

$42.80

$39.30

$2.20

$1.60

$1.90

'

'

'

'

'

'

'

'

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Basic earnings per share:	'	'	'	'
Net earnings attributable to BorgWarner Inc.	$166.60	$166.80	$515.90	$482.90
Weighted average shares of common stock outstanding	227,077	227,638	227,395	229,168
Basic earnings per share of common stock	$0.73	$0.73	$2.27	$2.11
Diluted earnings per share:	'	'	'	'
Net earnings attributable to BorgWarner Inc.	$166.60	$166.80	$515.90	$482.90
Weighted average shares of common stock outstanding	227,077	227,638	227,395	229,168
Effect of stock-based compensation	1,591	2,838	1,827	2,768
Weighted average shares of common stock outstanding including dilutive shares	228,668	230,476	229,222	231,936
Diluted earnings per share of common stock	$0.73	$0.72	$2.25	$2.08

Reporting_Segments_Details

Reporting Segments (Details) (USD $)	3 Months Ended			9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Dec. 31, 2013
				segment
Segment Reporting Information [Line Items]	'		'	'		'	'
Number of reportable segments	'		'	2		'	'
Net Sales by Reporting Segment	'		'	'		'	'
Segment Reporting, Entity Consolidated Revenue	$2,032.10		$1,806.20	$6,313.20		$5,551.20	'
Adjusted earnings before interest, income taxes and noncontrolling interest	'		'	'		'	'
Adjusted EBIT	290.6		261.4	933.6		799.8	'
Restructuring expense	13.1		0	67.6		0	'
Program termination agreement	0		0	0		11.3	'
Retirement related obligations	0		0	0		5.9	'
Corporate, including equity in affiliates' earnings and stock-based compensation	22.3		25.4	76		83.9	'
Interest income	-1.4		-1.3	-4.3		-3.3	'
Interest expense and finance charges	9		8.1	26.2		26.6	'
Earnings before income taxes and noncontrolling interest	244.9		229.2	765.4		675.4	'
Provision for income taxes	71.9		56.3	225.3		173.8	'
Net earnings	173		172.9	540.1		501.6	'
Net earnings attributable to the noncontrolling interest, net of tax	6.4		6.1	24.2		18.7	'
Net earnings attributable to BorgWarner Inc.	166.6		166.8	515.9		482.9	'
Segment Reporting Information - Assets	'		'	'		'	'
Total assets	7,282.30		'	7,282.30		'	6,917
Operating Segments [Member]	'		'	'		'	'
Segment Reporting Information - Assets	'		'	'		'	'
Total assets	5,762.20		'	5,762.20		'	5,305.70
Engine [Member]	'		'	'		'	'
Net Sales by Reporting Segment	'		'	'		'	'
Segment Reporting, Entity Consolidated Revenue	1,412.40		1,210.30	4,322		3,756.10	'
Adjusted earnings before interest, income taxes and noncontrolling interest	'		'	'		'	'
Adjusted EBIT	222.6		195.5	696		618.1	'
Segment Reporting Information - Assets	'		'	'		'	'
Total assets	3,968.60		'	3,968.60		'	3,519.10
Drivetrain [Member]	'		'	'		'	'
Net Sales by Reporting Segment	'		'	'		'	'
Segment Reporting, Entity Consolidated Revenue	627		604	2,016.40		1,818.90	'
Adjusted earnings before interest, income taxes and noncontrolling interest	'		'	'		'	'
Adjusted EBIT	68		65.9	237.6		181.7	'
Segment Reporting Information - Assets	'		'	'		'	'
Total assets	1,793.60		'	1,793.60		'	1,786.60
Intersegment Eliminations [Member]	'		'	'		'	'
Net Sales by Reporting Segment	'		'	'		'	'
Segment Reporting, Entity Consolidated Revenue	-7.3		-8.1	-25.2		-23.8	'
Corporate Segment [Member]	'		'	'		'	'
Segment Reporting Information - Assets	'		'	'		'	'
Total assets	$1,520.10	[1]	'	$1,520.10	[1]	'	$1,611.30	[1]
[1]	Corporate assets include investments and advances and deferred income taxes.

Recent_Transactions_Details

Recent Transactions (Details)

9 Months Ended

0 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Feb. 28, 2014

Feb. 28, 2014

Sep. 30, 2014

Feb. 28, 2014

Sep. 30, 2014

Feb. 28, 2014

Sep. 30, 2014

Feb. 28, 2014

Feb. 28, 2014

USD ($)

USD ($)

USD ($)

Wahler

Wahler

Wahler

Wahler

Wahler

Wahler

Wahler

Wahler

Trade Names [Member]

USD ($)

EUR (€)

Customer Relationships [Member]

Customer Relationships [Member]

Know-how [Member]

Know-how [Member]

Patented technology [Member]

Patented technology [Member]

Wahler

USD ($)

USD ($)

USD ($)

USD ($)

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Equity interest acquired

'

'

'

100.00%

100.00%

'

'

'

'

'

'

'

Liabilities assumed from business acquired

$3.20

$0

'

$3.20

'

'

'

'

'

'

'

'

Debt assumed from business acquired

40.3

0

'

40.3

'

'

'

'

'

'

'

'

Aggregated estimated fair value of assets acquired and liabilities assumed

'

'

'

'

'

'

'

'

'

'

'

'

Receivables, net

'

'

'

55.2

'

'

'

'

'

'

'

'

Inventories, net

'

'

'

47.1

'

'

'

'

'

'

'

'

Property, plant and equipment, net

'

'

'

55.3

'

'

'

'

'

'

'

'

Goodwill

1,210.80

'

1,197

56.3

'

'

'

'

'

'

'

'

Other intangible assets, net of tax

'

'

'

42.7

'

'

24.9

'

10.2

'

4.1

3.5

Other assets and liabilities

'

'

'

-32.5

'

'

'

'

'

'

'

'

Accounts payable and accrued expenses

'

'

'

-74.2

'

'

'

'

'

'

'

'

Total consideration, net of cash acquired

'

'

'

149.9

'

'

'

'

'

'

'

'

Less: Assumed retirement-related liabilities

'

'

'

3.2

'

'

'

'

'

'

'

'

Less: Assumed debt

'

'

'

40.3

'

'

'

'

'

'

'

'

Cash paid, net of cash acquired

106.4

0

'

106.4

77.1

'

'

'

'

'

'

'

Weighted average useful life

'

'

'

'

'

'15 years

'

'15 years

'

'7 years

'

'

Nondeductible amount of goodwill

'

'

'

22.4

'

'

'

'

'

'

'

'

Goodwill, Purchase Accounting Adjustments

$9

'

'

'

'

'

'

'

'

'

'

'