BorgWarner (BWA) 10-K 13 Feb 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document (USD $)	12 Months Ended
In Billions, except Share data, unless otherwise specified	Dec. 31, 2013	Feb. 07, 2014	Jun. 30, 2013
DEI Information [Abstract]	'	'	'
Entity Registrant Name	'BORGWARNER INC.	'	'
Entity Central Index Key	'0000908255	'	'
Document Type	'10-K	'	'
Document Period End Date	31-Dec-13	'	'
Amendment Flag	'false	'	'
Current Fiscal Year End Date	'--12-31	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Public Float	'	'	$9.90
Entity Common Stock, Shares Outstanding	'	227,944,747	'

BorgWarner_Inc_and_Consolidate

BorgWarner Inc. and Consolidated Subsidiaries Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, except Share data, unless otherwise specified
ASSETS	'	'
Cash	$939.50	$715.70
Receivables, net	1,248.50	1,147.30
Inventories, net	458.1	447.6
Deferred income taxes	68.7	94.7
Prepayments and other current assets	83.7	67.5
Total current assets	2,798.50	2,472.80
Property, plant and equipment, net	1,939.40	1,788
Investments and advances	405.1	382.7
Goodwill	1,197	1,181.40
Other non-current assets	577	575.9
Total assets	6,917	6,400.80
LIABILITIES AND EQUITY	'	'
Notes payable and other short-term debt	201.6	243.4
Accounts payable and accrued expenses	1,383.80	1,287.20
Income taxes payable	38.5	72.5
Total current liabilities	1,623.90	1,603.10
Long-term debt	1,021	823.8
Other non-current liabilities:	'	'
Retirement-related liabilities	312.9	509.7
Other	326.8	318.1
Total other non-current liabilities	639.7	827.8
Capital stock:	'	'
Preferred stock	'	'
Common stock	2.5	1.2
Capital in excess of par value	1,121.90	1,160.70
Retained earnings	3,177.40	2,611.20
Accumulated other comprehensive loss	-14	-121.3
Common stock held in treasury	-727.2	-569.2
Total BorgWarner Inc. stockholders’ equity	3,560.60	3,082.60
Noncontrolling interest	71.8	63.5
Total equity	3,632.40	3,146.10
Total liabilities and equity	6,917	6,400.80
Preferred Stock, Par or Stated Value Per Share	$0.01	$0.01
Preferred Stock, Shares Authorized	5,000,000	5,000,000
Preferred Stock, Shares Issued	0	0
Common Stock, Par or Stated Value Per Share	$0.01	$0.01
Common Stock, Shares Authorized	390,000,000	390,000,000
Common Stock, Shares, Issued	246,421,893	246,046,318
Common Stock, Shares, Outstanding	227,932,856	231,145,398
Treasury Stock, Shares	18,489,037	14,900,920
Nonvoting Common Stock [Member]	'	'
Capital stock:	'	'
Common stock	'	'
Common Stock, Par or Stated Value Per Share	$0.01	$0.01
Common Stock, Shares Authorized	25,000,000	25,000,000
Common Stock, Shares, Issued	0	0
Common Stock, Shares, Outstanding	0	0

BorgWarner_Inc_and_Consolidate1

BorgWarner Inc. and Consolidated Subsidiaries Consolidated Statements of Operations (USD $)	12 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Dec. 31, 2013
Income Statement [Abstract]	'
Net sales	$7,436.60
Cost of sales	5,879.10
Gross profit	1,557.50
Selling, general and administrative expenses	639.7
Other expense (income)	62.6
Operating income	855.2
Equity in affiliates’ earnings, net of tax	-43.5
Interest income	-4.8
Interest expense and finance charges	34.2
Earnings before income taxes and noncontrolling interest	869.3
Provision for income taxes	218.3
Net earnings	651
Net earnings attributable to the noncontrolling interest, net of tax	26.7
Net earnings attributable to BorgWarner Inc.	$624.30
Earnings per share — basic	$2.73
Earnings per share — diluted	$2.70	[1]
Weighted average shares outstanding:	'
Basic	228,600
Diluted	231,337
Dividends declared per share	$0.25
[1]	* The Company's diluted earnings per share for the years ended December 31, 2012 and 2011 includes the impact of the Company's 3.50% convertible senior notes and associated warrants. Refer to Note 16, "Earnings Per Share," for further information on the diluted earnings per share calculation.

BorgWarner_Inc_and_Consolidate2

BorgWarner Inc. and Consolidated Subsidiaries Statements of Comprehensive Income (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011
Statement of Comprehensive Income [Abstract]	'	'		'
Net earnings attributable to BorgWarner Inc.	$624.30	$500.90	[1]	$550.10
Foreign currency translation adjustments	40.3	55		-62.2
Net change in hedge instruments	21.2	13.3		-5.7
Net change in defined benefit postretirement plans	44.3	-38.6		-29.1
Other	1.5	-0.2		-0.1
Total other comprehensive income (loss) attributable to BorgWarner Inc.	107.3	29.5		-97.1
Comprehensive income attributable to BorgWarner Inc.	731.6	530.4		453
Comprehensive income (loss) attributable to the noncontrolling interest	1.7	2.8		-1.3
Comprehensive income	$733.30	$533.20		$451.70
[1]	The Company's results were impacted by the following:•Quarter ended December 31, 2013: The Company incurred restructuring expense of $52.3 million, related to the initiation of Drivetrain segment actions designed to improve future profitability and competitiveness. The Company recorded tax benefits of $7.1 million in connection with the restructuring expense. Additionally, the Company recorded a net tax benefit of $4.4 million related to the reversal of certain state deferred tax asset valuation allowances and other tax adjustments.•Quarter ended September 30, 2013: The Company incurred a net tax benefit of $5.6 million, which was comprised of tax benefits of $3.1 million related to 2012 provision to return adjustments and $2.5 million related to the reversal of certain state deferred tax asset valuation allowances.•Quarter ended March 31, 2013: The Company incurred $11.3 million of expense related to a program termination agreement. Retirement related obligations expense of $5.9 million was primarily related to a first quarter 2013 grant of restricted stock awards to certain retiring NEOs as to which the Company waived the forfeiture provisions. The Company recorded tax benefits of $3.8 million and $2.1 million related to the program termination agreement and retirement related obligations. Additionally, the Company recorded a net tax benefit of $1.7 million, which was 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, partially offset by a $4.9 million tax expense related to a comprehensive income adjustment.•Quarter ended December 31, 2012: Retirement related obligations of $17.3 million are comprised of a $5.7 million loss resulting from the settlement of a portion of the Muncie Plant's pension obligation and an $11.6 million expense associated with the retirement of certain NEOs. These obligations were partially offset by a $6.1 million tax benefit. The Company incurred tax expense of $3.9 million which included $11.1 million of U.S. tax expense to correct the income taxes payable balance, partially offset by tax benefits resulting from changes to the statutory income tax rate in certain countries and the settlement of certain tax audits. •Quarter ended September 30, 2012: The Company incurred $1.8 million of expense and $11.2 million of tax expense associated with the completion of the sale of its spark plug business. The Company also recorded restructuring expense of $27.4 million primarily associated with the disposal and future requirements of BERU's on-going business, which was partially offset by a tax benefit of $7.7 million. Additionally, the Company incurred tax expense of $6.9 million primarily resulting from the settlement of certain tax audits.•Quarter ended June 30, 2012: The Company recorded expense of $37.9 million primarily due to the write-down of prior purchase price accounting adjustments included within the disposal group as a result of signing a Master Purchase Agreement to sell the spark plug business to Federal-Mogul Corporation, which was partially offset by a tax benefit of $5.5 million resulting from the write-down. Additionally, the Company recorded tax expense of $9.0 million related to its decision to change its cash repatriation assertion for some of its foreign subsidiaries.

BorgWarner_Inc_and_Consolidate3

BorgWarner Inc. and Consolidated Subsidiaries Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
OPERATING	'		'		'
Net earnings	$651		$522.40		$570.60
Adjustments to reconcile net earnings to net cash flows from operations:	'		'		'
Depreciation and tooling amortization	272.7		260.2		252.2
Amortization of intangible assets and other	26.7		28.4		30.8
Loss from disposal activities, net of cash paid	'		31.7		21.5
Restructuring expense, net of cash paid	48.5		23.3		'
Stock-based compensation expense	36.6		56.7		21.8
Deferred income tax benefit	-22.9		-10.7		-1.1
Bond amortization	'		5.3		20.3
Equity in affiliates’ earnings, net of dividends received, and other	-21.3		-13		-7.8
Net earnings adjusted for non-cash charges to operations	991.3		904.3		908.3
Changes in assets and liabilities:	'		'		'
Receivables	-91.7		43.8		-150.6
Inventories	-14.8		-5.3		-38.6
Prepayments and other current assets	-14.2		-15.4		-2.4
Accounts payable and accrued expenses	33.1		-27.1		53
Income taxes payable	-30		44.9		-15.4
Other non-current assets and liabilities	-154.9		-66.5		-46.1
Net cash provided by operating activities	718.8		878.7		708.2
INVESTING	'		'		'
Capital expenditures, including tooling outlays	-417.8	[1]	-407.4	[1]	-393.7	[1]
Net proceeds from asset disposals	23.9		5.4		7.9
Payments for businesses acquired, net of cash acquired	'		'		-203.7
Net proceeds from sale of businesses	9.1		56.8		25
Net cash used in investing activities	-384.8		-345.2		-564.5
FINANCING	'		'		'
Net (decrease) increase in notes payable	-44.4		12.8		67.6
Additions to long-term debt, net of debt issuance costs	289.5		313.9		364.6
Repayments of long-term debt, including current portion	-77		-246.4		-309.1
Proceeds from accounts receivable securitization facility	'		30		'
Payments for purchase of treasury stock	-225.5		-295.9		-357.6
Proceeds from stock options exercised, including the tax benefit	33		52		53
Taxes paid on employees' restricted stock award vestings	-40.9		-18.1		-14.4
Purchase of noncontrolling interest	'		-15		-29.4
Capital contribution from noncontrolling interest	'		'		19.5
Dividends paid to BorgWarner stockholders	-56.8		'		'
Dividends paid to noncontrolling stockholders	-13.3		-21.9		-13.9
Net cash used in financing activities	-135.4		-188.6		-219.7
Effect of exchange rate changes on cash	25.2		11.2		-14.3
Net increase (decrease) in cash	223.8		356.1		-90.3
Cash at beginning of year	715.7		359.6		449.9
Cash at end of year	939.5		715.7		359.6
SUPPLEMENTAL CASH FLOW INFORMATION	'		'		'
Net cash paid during the year for interest	50.4		57		68.5
Net cash paid during the year for income taxes	$252.90		$158.90		$175.50
[1]	Long-lived asset expenditures include capital expenditures and tooling outlays.

BorgWarner_Inc_and_Consolidate4

BorgWarner Inc. and Consolidated Subsidiaries Consolidated Statements of Equity (USD $)	Total		Issued common stock	Capital in excess of par value	Common stock held in treasury	Retained earnings	Accumulated other comprehensive income (loss)	Noncontrolling interests	Employee Stock Option [Member]	Performance Shares [Member]	Restricted Stock [Member]
In Millions, except Share data, unless otherwise specified	USD ($)		USD ($)	USD ($)	USD ($)	USD ($)	USD ($)	USD ($)	Common stock held in treasury	Common stock held in treasury	Common stock held in treasury
Beginning Balance at Dec. 31, 2010	'		$1.20	$1,100.40	($349.50)	$1,560.20	($53.70)	$51.20	'	'	'
Beginning Balance, shares at Dec. 31, 2010	'		240,172,412	'	15,539,524	'	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'		'	'	'	'	'	'	'	'	'
Dividends declared	'		'	'	'	'	'	-22	'	'	'
Stock incentive plans	'		'	38.7	'	'	'	'	'	'	'
Shares outstanding under option, exercised	2,066,000		2,040,750	'	'	'	'	'	'	'	'
Executive stock plan	'		'	6.8	'	'	'	'	'	'	'
Executive stock plan, shares	'		208,410	'	'	'	'	'	'	'	'
Net issuance of restricted stock	'		'	15	'	'	'	'	'	'	'
Net issuance of restricted stock, less amortization, shares	'		209,838	'	'	'	'	'	'	'	'
Purchase of treasury stock	'		'	'	-357.6	'	'	'	'	'	'
Net earnings attributable to BorgWarner Inc.	550.1		'	'	'	550.1	'	'	'	'	'
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	-97.1		'	'	'	'	-97.1	'	'	'	'
Comprehensive income (loss) attributable to the noncontrolling interest	-1.3		'	'	'	'	'	-1.3	'	'	'
Purchases of treasury stock, shares	'		'	'	-10,062,962	'	'	'	'	'	'
Net earnings attributable to the noncontrolling interest, net of tax	20.5		'	'	'	'	'	20.5	'	'	'
Capital contribution from noncontrolling interest	19.5		'	'	'	'	'	19.5	'	'	'
Adjustments to capital in excess of par value	'		'	-26.6	'	'	'	'	'	'	'
Purchase of subsidiary shares from noncontrolling interest	'		'	'	'	'	'	-2.8	'	'	'
Ending Balance at Dec. 31, 2011	'		1.2	1,134.30	-707.1	2,110.30	-150.8	65.1	'	'	'
Ending Balance, shares at Dec. 31, 2011	'		242,631,410	'	25,602,486	'	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'		'	'	'	'	'	'	'	'	'
Dividends declared	'		'	'	'	'	'	-18.9	'	'	'
Stock incentive plans	'		'	52	'	'	'	'	'	'	'
Shares outstanding under option, exercised	1,568,000		1,555,850	'	'	'	'	'	'	'	'
Executive stock plan	'		'	39.3	'	'	'	'	'	'	'
Executive stock plan, shares	'		1,076,360	'	'	'	'	'	'	'	'
Net issuance of restricted stock	'		'	21.2	'	'	'	'	'	'	'
Adjustments Related to Tax Withholding for Share-based Compensation	'		'	'	-18.1	'	'	'	'	'	'
Net issuance of restricted stock, less amortization, shares	'		782,698	'	'	'	'	'	'	'	'
Shares Paid for Tax Withholding for Share Based Compensation	'		'	'	-482,500	'	'	'	'	'	'
Purchase of treasury stock	'		'	'	-295.9	'	'	'	'	'	'
Net earnings attributable to BorgWarner Inc.	500.9	[1]	'	'	'	500.9	'	'	'	'	'
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	29.5		'	'	'	'	29.5	'	'	'	'
Comprehensive income (loss) attributable to the noncontrolling interest	2.8		'	'	'	'	'	2.8	'	'	'
Stock Issued During Period, Shares, Conversion of Convertible Securities	22,800,000		'	'	22,765,542	'	'	'	'	'	'
Adjustments to additional paid in capital, equity component of convertible debt	243.5		'	-243.5	'	'	'	'	'	'	'
Conversion of convertible securities, value of shares issued	617.3		'	'	617.3	'	'	'	'	'	'
Treasury stock received from bond hedge, shares	-13,000,000		'	'	-12,979,396	'	'	'	'	'	'
Adjustments to additional paid in capital, bond hedge	503.9		'	503.9	'	'	'	'	'	'	'
Treasury stock received from bond hedge, value	-503.9		'	'	-503.9	'	'	'	'	'	'
Treasury stock issued due to settlement of warrant, shares	9,800,000		'	'	9,709,308	'	'	'	'	'	'
Adjustments to additional paid in capital, warrant	338.5		'	-338.5	'	'	'	'	'	'	'
Treasury stock issue due to settlement of warrant, value	'		'	'	338.5	'	'	'	'	'	'
Purchases of treasury stock, shares	'		'	'	-8,311,388	'	'	'	'	'	'
Net earnings attributable to the noncontrolling interest, net of tax	21.5		'	'	'	'	'	21.5	'	'	'
Adjustments to capital in excess of par value	'		'	-8	'	'	'	'	'	'	'
Purchase of subsidiary shares from noncontrolling interest	'		'	'	'	'	'	-7	'	'	'
Ending Balance at Dec. 31, 2012	3,146.10		1.2	1,160.70	-569.2	2,611.20	-121.3	63.5	'	'	'
Ending Balance, shares at Dec. 31, 2012	'		246,046,318	'	14,900,920	'	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'		'	'	'	'	'	'	'	'	'
Dividends declared	'		'	'	'	'	'	-20.1	'	'	'
Stock incentive plans	'		'	33	'	'	'	'	'	'	'
Shares outstanding under option, exercised	870,000		8,200	'	'	'	'	'	'	'	'
Executive stock plan	'		'	10.8	'	'	'	'	'	'	'
Net issuance of restricted stock, less amortization, shares	'		367,375	'	'	'	'	'	'	'	'
Purchase of treasury stock	'		'	'	-225.5	'	'	'	'	'	'
Stock split	'		1.3	'	'	'	'	'	'	'	'
Dividends, Common Stock	'		'	'	'	-1.3	'	'	'	'	'
Dividends declared	'		'	'	'	-56.8	'	'	'	'	'
Net earnings attributable to BorgWarner Inc.	624.3		'	'	'	624.3	'	'	'	'	'
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	107.3		'	'	'	'	107.3	'	'	'	'
Comprehensive income (loss) attributable to the noncontrolling interest	1.7		'	'	'	'	'	1.7	'	'	'
Treasury stock issued due to settlement of warrant, shares	'		'	'	'	'	'	'	861,866	644,638	148,485
Treasury Stock Reissued at Lower than Repurchase Price	'		'	-82.6	'	'	'	'	'	'	'
Treasury stock issue due to settlement of warrant, value	'		'	'	67.5	'	'	'	'	'	'
Purchases of treasury stock, shares	'		'	'	-5,243,106	'	'	'	'	'	'
Net earnings attributable to the noncontrolling interest, net of tax	26.7		'	'	'	'	'	26.7	'	'	'
Ending Balance at Dec. 31, 2013	$3,632.40		$2.50	$1,121.90	($727.20)	$3,177.40	($14)	$71.80	'	'	'
Ending Balance, shares at Dec. 31, 2013	'		246,421,893	'	18,489,037	'	'	'	'	'	'
[1]	The Company's results were impacted by the following:•Quarter ended December 31, 2013: The Company incurred restructuring expense of $52.3 million, related to the initiation of Drivetrain segment actions designed to improve future profitability and competitiveness. The Company recorded tax benefits of $7.1 million in connection with the restructuring expense. Additionally, the Company recorded a net tax benefit of $4.4 million related to the reversal of certain state deferred tax asset valuation allowances and other tax adjustments.•Quarter ended September 30, 2013: The Company incurred a net tax benefit of $5.6 million, which was comprised of tax benefits of $3.1 million related to 2012 provision to return adjustments and $2.5 million related to the reversal of certain state deferred tax asset valuation allowances.•Quarter ended March 31, 2013: The Company incurred $11.3 million of expense related to a program termination agreement. Retirement related obligations expense of $5.9 million was primarily related to a first quarter 2013 grant of restricted stock awards to certain retiring NEOs as to which the Company waived the forfeiture provisions. The Company recorded tax benefits of $3.8 million and $2.1 million related to the program termination agreement and retirement related obligations. Additionally, the Company recorded a net tax benefit of $1.7 million, which was 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, partially offset by a $4.9 million tax expense related to a comprehensive income adjustment.•Quarter ended December 31, 2012: Retirement related obligations of $17.3 million are comprised of a $5.7 million loss resulting from the settlement of a portion of the Muncie Plant's pension obligation and an $11.6 million expense associated with the retirement of certain NEOs. These obligations were partially offset by a $6.1 million tax benefit. The Company incurred tax expense of $3.9 million which included $11.1 million of U.S. tax expense to correct the income taxes payable balance, partially offset by tax benefits resulting from changes to the statutory income tax rate in certain countries and the settlement of certain tax audits. •Quarter ended September 30, 2012: The Company incurred $1.8 million of expense and $11.2 million of tax expense associated with the completion of the sale of its spark plug business. The Company also recorded restructuring expense of $27.4 million primarily associated with the disposal and future requirements of BERU's on-going business, which was partially offset by a tax benefit of $7.7 million. Additionally, the Company incurred tax expense of $6.9 million primarily resulting from the settlement of certain tax audits.•Quarter ended June 30, 2012: The Company recorded expense of $37.9 million primarily due to the write-down of prior purchase price accounting adjustments included within the disposal group as a result of signing a Master Purchase Agreement to sell the spark plug business to Federal-Mogul Corporation, which was partially offset by a tax benefit of $5.5 million resulting from the write-down. Additionally, the Company recorded tax expense of $9.0 million related to its decision to change its cash repatriation assertion for some of its foreign subsidiaries.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Summary of significant accounting policies	'
	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	The following paragraphs briefly describe the Company's significant accounting policies.
	Basis of presentation In 2012, the Company retrospectively adopted the amendment to Accounting Standards Codification ("ASC") Topic 220, "Comprehensive Income," which requires companies to separately disclose reclassifications from other comprehensive income into net income on the face of the financial statements. Prior year balances within the Consolidated Statements of Comprehensive Income conform to this requirement. Certain prior period amounts have been reclassified to conform to current period presentation.
	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.
	Use of estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the accompanying notes, as well as, the amounts of revenues and expenses reported during the periods covered by these financial statements and accompanying notes. Actual results could differ from those estimates.
	Concentrations of risk Cash is maintained with several financial institutions. Deposits held with banks may exceed the amount of insurance provided on such deposits. Generally, these deposits may be redeemed upon demand and are maintained with financial institutions of reputable credit and therefore bear minimal risk.
	The Company performs ongoing credit evaluations of its suppliers and customers and, with the exception of certain financing transactions, does not require collateral from its OEM customers. Some automotive parts suppliers continue to experience commodity cost pressures and the effects of industry overcapacity. These factors have increased pressure on the industry's supply base, as suppliers cope with higher commodity costs, lower production volumes and other challenges. The Company receives certain of its raw materials from sole suppliers or a limited number of suppliers. The inability of a supplier to fulfill supply requirements of the Company could materially affect future operating results.
	Principles of consolidation The Consolidated Financial Statements include all majority-owned subsidiaries with a controlling financial interest. All inter-company accounts and transactions have been eliminated in consolidation. Investments in 20% to 50% owned affiliates are accounted for under the equity method when the Company does not have a controlling financial interest.
	Revenue recognition The Company recognizes revenue when title and risk of loss pass to the customer, which is usually upon shipment of product. Although the Company may enter into long-term supply agreements with its major customers, each shipment of goods is treated as a separate sale and the prices are not fixed over the life of the agreements.
	Cost of sales The Company includes materials, direct labor and manufacturing overhead within cost of sales. Manufacturing overhead is comprised of indirect materials, indirect labor, factory operating costs and other such costs associated with manufacturing products for sale.
	Cash Cash is valued at fair market value. It is the Company's policy to classify all highly liquid investments with original maturities of three months or less as cash.
	Receivables, net The Company securitizes certain receivables through third party financial institutions without recourse and continues to administer the collection of these receivables on behalf of the third party. The amount can vary each month based on the amount of underlying receivables. On December 21, 2009, the Company entered into a $50 million accounts receivable securitization facility, which was amended on September 8, 2010 to increase the facility to $80 million and then again on November 1, 2012 to increase the facility to $110 million. The amended facility matures on October 31, 2014.
	Inventories, net Inventories are valued at the lower of cost or market. Cost of U.S. inventories is determined using the last-in, first-out (“LIFO”) method, while the foreign operations use the first-in, first-out (“FIFO”) or average-cost methods. Inventory held by U.S. operations was $109.3 million and $102.1 million at December 31, 2013 and 2012, respectively. Such inventories, if valued at current cost instead of LIFO, would have been greater by $16.0 million at December 31, 2013 and 2012.
	See Note 5 to the Consolidated Financial Statements for more information on inventories, net.
	Pre-production costs related to long-term supply arrangements Engineering, research and development and other design and development costs for products sold on long-term supply arrangements are expensed as incurred unless the Company has a contractual guarantee for reimbursement from the customer. Costs for molds, dies and other tools used to make products sold on long-term supply arrangements for which the Company either has title to the assets or has the non-cancelable right to use the assets during the term of the supply arrangement are capitalized in property, plant and equipment and amortized to cost of sales over the shorter of the term of the arrangement or over the estimated useful lives of the assets, typically three to five years. Costs for molds, dies and other tools used to make products sold on long-term supply arrangements for which the Company has a contractual guarantee for lump sum reimbursement from the customer are capitalized in prepayments and other current assets.
	Property, plant and equipment, net Property, plant and equipment is valued at cost less accumulated depreciation. Expenditures for maintenance, repairs and renewals of relatively minor items are generally charged to expense as incurred. Renewals of significant items are capitalized. Depreciation is generally computed on a straight-line basis over the estimated useful lives of the assets. Useful lives for buildings range from 15 to 40 years and useful lives for machinery and equipment range from three to 12 years. For income tax purposes, accelerated methods of depreciation are generally used.
	See Note 5 to the Consolidated Financial Statements for more information on property, plant and equipment, net.
	Impairment of long-lived assets, including definite-lived intangible assets The Company reviews the carrying value of its long-lived assets, whether held for use or disposal, including other amortizing intangible assets, when events and circumstances warrant such a review under Accounting Standards Codification ("ASC") Topic 360. In assessing long-lived assets for an impairment loss, assets are grouped with other assets and liabilities at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities. In assessing long-lived assets for impairment, management generally considers individual facilities the lowest level for which identifiable cash flows are largely independent. A recoverability review is performed using the undiscounted cash flows if there is a triggering event. If the undiscounted cash flow test for recoverability identifies a possible impairment, management will perform a fair value analysis. Management determines fair value under ASC Topic 820 using the appropriate valuation technique of market, income or cost approach. If the carrying value of a long-lived asset is considered impaired, an impairment charge is recorded for the amount by which the carrying value of the long-lived asset exceeds its fair value.
	Management believes that the estimates of future cash flows and fair value assumptions are reasonable; however, changes in assumptions underlying these estimates could affect the valuations. Long-lived assets held for sale are recorded at the lower of their carrying amount or fair value less cost to sell. Significant judgments and estimates used by management when evaluating long-lived assets for impairment include: (i) an assessment as to whether an adverse event or circumstance has triggered the need for an impairment review; (ii) undiscounted future cash flows generated by the asset; and (iii) fair valuation of the asset.
	Goodwill and other indefinite-lived intangible assets During the fourth quarter of each year, the Company qualitatively assesses its goodwill and indefinite-lived intangible assets assigned to each of its reporting units. This qualitative assessment evaluates various events and circumstances, such as macro economic conditions, industry and market conditions, cost factors, relevant events and financial trends, that may impact a reporting unit's fair value. Using this qualitative assessment, the Company determines whether it is more-likely-than not the reporting unit's fair value exceeds its carrying value. If it is determined that it is not more-likely-than-not the reporting unit's fair value exceeds the carrying value, or upon a triggering event, including recent acquisition or divestiture activity, the Company performs a quantitative, "step one," goodwill impairment analysis.
	See Note 6 to the Consolidated Financial Statements for more information on goodwill and other indefinite-lived intangible assets.
	Product warranties 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 product warranty accrual is allocated to current and non-current liabilities in the Consolidated Balance Sheets.
	See Note 7 to the Consolidated Financial Statements for more information on product warranties.
	Other loss accruals and valuation allowances The Company has numerous other loss exposures, such as customer claims, workers' compensation claims, litigation and recoverability of assets. Establishing loss accruals or valuation allowances for these matters requires the use of estimates and judgment in regard to the risk exposure and ultimate realization. The Company estimates losses under the programs using consistent and appropriate methods, however, changes to its assumptions could materially affect the recorded accrued liabilities for loss or asset valuation allowances.
	Derivative financial instruments The Company recognizes that certain normal business transactions generate risk. Examples of risks include exposure to exchange rate risk related to transactions denominated in currencies other than the functional currency, changes in commodity costs and interest rates. It is the objective and responsibility of the Company to assess the impact of these transaction risks and offer protection from selected risks through various methods, including financial derivatives. Virtually all derivative instruments held by the Company are designated as hedges, have high correlation with the underlying exposure and are highly effective in offsetting underlying price movements. Accordingly, gains and losses from changes in qualifying hedge fair values are matched with the underlying transactions. All hedge instruments are carried at their fair value based on quoted market prices for contracts with similar maturities. The Company does not engage in any derivative transactions for purposes other than hedging specific risks.
	See Note 10 to the Consolidated Financial Statements for more information on derivative financial instruments.
	Foreign currency The financial statements of foreign subsidiaries are translated to U.S. dollars using the period-end exchange rate for assets and liabilities and an average exchange rate for each period for revenues, expenses and capital expenditures. The local currency is the functional currency for substantially all of the Company's foreign subsidiaries. Translation adjustments for foreign subsidiaries are recorded as a component of accumulated other comprehensive income (loss) in equity. The Company recognizes transaction gains and losses arising from fluctuations in currency exchange rates on transactions denominated in currencies other than the functional currency in earnings as incurred.
	See Note 13 to the Consolidated Financial Statements for more information on accumulated other comprehensive income (loss).
	Environmental contingencies  The Company accounts for environmental costs in accordance with ASC Topic 450. Costs related to environmental assessments and remediation efforts at operating facilities are accrued when it is probable that a liability has been incurred and the amount of that liability can be reasonably estimated. Estimated costs are recorded at undiscounted amounts, based on experience and assessments and are regularly evaluated. The liabilities are recorded in accounts payable and accrued expenses and other non-current liabilities in the Company's Consolidated Balance Sheets.
	See Note 14 to the Consolidated Financial Statements for more information regarding environmental contingencies.
	Pensions and other postretirement employee defined benefits  The Company's defined benefit pension and other postretirement employee benefit plans are accounted for in accordance with ASC Topic 715. Disability, early retirement and other postretirement employee benefits are accounted for in accordance with ASC Topic 712.
	Pensions and other postretirement employee benefit costs and related liabilities and assets are dependent upon assumptions used in calculating such amounts. These assumptions include discount rates, expected returns on plan assets, health care cost trends, compensation and other factors. In accordance with GAAP, actual results that differ from the assumptions used are accumulated and amortized over future periods, and accordingly, generally affect recognized expense in future periods.
	See Note 11 to the Consolidated Financial Statements for more information regarding the Company's pension and other postretirement employee defined benefit plans.
	Income taxes  In accordance with ASC Topic 740, the Company's income tax expense is calculated based on expected income and statutory tax rates in the various jurisdictions in which the Company operates and requires the use of management's estimates and judgments.
	See Note 4 to the Consolidated Financial Statements for more information regarding income taxes.
	New Accounting Pronouncements
	In July 2013, the Financial Accounting Standards Board amended ASC Topic 740, "Income Taxes," requiring an unrecognized tax benefit, or a portion of an unrecognized tax benefit, to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. This guidance is effective prospectively for interim and annual periods beginning after December 15, 2013. The Company anticipates the adoption of this guidance will not have a material impact to its Consolidated Financial Statements.

Research_and_Development_Costs

Research and Development Costs	12 Months Ended
	Dec. 31, 2013
Research and Development [Abstract]	'
Research and development costs	'
	RESEARCH AND DEVELOPMENT COSTS
	The Company's net Research & Development ("R&D") expenditures are included in selling, general and administrative expenses of the 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:
		Year Ended December 31,
	(millions of dollars)	2013			2012			2011
	Gross R&D expenditures	$	350.4		$	309.3		$	294.7
	Customer reimbursements	(47.2		)	(43.4		)	(51.0		)
	Net R&D expenditures	$	303.2		$	265.9		$	243.7
	Net R&D expenditures as a percentage of net sales were 4.1%, 3.7% and 3.4% in the years ended December 31, 2013, 2012 and 2011, respectively. The Company has contracts with several customers at the Company's various R&D locations. No such contract exceeded 5% of net R&D expenditures in any of the years presented.

Other_Income_Expense

Other Income Expense	12 Months Ended
	Dec. 31, 2013
Other Income and Expenses [Abstract]	'
Other (income) expense	'
	OTHER EXPENSE (INCOME)
	The following table presents items included in other expense (income):
		Year Ended December 31,
	(millions of dollars)	2013			2012		2011
	Restructuring expense	$	52.3		$	27.4	$	—
	Program termination agreement	11.3			—		—
	Retirement related obligations	5.9			17.3		—
	Loss from disposal activities	—			39.7		21.5
	Patent infringement settlement, net of legal costs incurred	—			—		(29.1		)
	Other	(6.9		)	0.3		(0.5		)
	Other expense (income)	$	62.6		$	84.7	$	(8.1	)
	During the fourth quarter of 2013, the Company recorded restructuring expense of $52.3 million primarily related to the initiation of Drivetrain segment actions designed to improve future profitability and competitiveness. Included in this restructuring expense are asset impairment expenses of $37.3 million, employee termination benefits of $10.4 million and $4.6 million of other expense. Asset impairment charges recorded in 2013 primarily relate to the write-down of machinery and equipment and intangible assets associated with the announced closure of certain European facilities within the Company's Drivetrain segment. The employee termination costs relate to approximately 300 employees primarily in Europe. It is expected the liability for these benefits will be paid out by the middle of 2015.
	During the first quarter of 2013, the Company recorded an $11.3 million expense related to a program termination agreement, which was paid in the second and third quarters of 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 ("NEOs"). The Company recorded a $5.9 million retirement related obligation primarily related to a first quarter 2013 grant of restricted stock awards to these NEOs.
	During the fourth quarter of 2012, the Company recorded retirement related obligations of $17.3 million comprised of a $5.7 million loss resulting from the settlement of a portion of the Muncie Plant's pension obligation and an $11.6 million expense associated with the retirement of certain NEOs. Refer to Notes 11 and 12 to the Consolidated Financial Statements for further information regarding the Muncie Plant's settlement loss and the Company's decision to waive the forfeiture provisions of existing restricted stock and performance share grants made to certain retiring NEOs.
	During the second and third quarters of 2012, the Company incurred $39.7 million in expense associated with the loss on sale of the spark plug business, primarily related to the to write-down of prior purchase price accounting adjustments included within the disposal group. These purchase price accounting adjustments were originally reported in the Engine segment and related to the BERU acquisition. The Company also recorded restructuring expense of $27.4 million in the third quarter of 2012 primarily associated with the disposal and future requirements of BERU's on-going business, which included $9.0 million of employee termination benefits, $6.3 million of contract cancellation costs and $12.1 million of other charges, primarily related to the write-down of certain assets.
	On May 16, 2011, BorgWarner and Honeywell settled a lawsuit resolving BorgWarner's patent infringement claims. As a result of the settlement, Honeywell paid $32.5 million for a paid up license to use the asserted BorgWarner patents. During 2011, the Company incurred $3.4 million in legal costs related to this lawsuit and after deducting these costs, the Company recorded a net gain of $29.1 million.
	See Note 17 to the Consolidated Financial Statements for information regarding the Company's 2011 loss from disposal activities.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income taxes	'
	INCOME TAXES
	Earnings before income taxes and the provision for income taxes are presented in the following table.
		Year Ended December 31,
	(millions of dollars)	2013				2012			2011
	Earnings before income taxes:
	U.S.	$	136.2			$	132.3		$	119.2
	Non-U.S.	733.1				628.7			646.7
	Total	$	869.3			$	761		$	765.9
	Provision for income taxes:
	Current:
	Federal	$	27.7			$	59.8		$	31.8
	State	2.6				3.4			1.7
	Foreign	211.1				186.1			162.9
	Total current	241.4				249.3			196.4
	Deferred:
	Federal	(2.3		)		19.6			17.3
	State	(7.3		)		(0.1		)	0.1
	Foreign	(13.5		)		(30.2		)	(18.5		)
	Total deferred	(23.1		)		(10.7		)	(1.1		)
	Total provision for income taxes	$	218.3			$	238.6		$	195.3
	The provision for income taxes resulted in an effective tax rate of 25.1%, 31.4% and 25.5% for the years ended December 31, 2013, 2012 and 2011, respectively. An analysis of the differences between the effective tax rate and the U.S. statutory rate for the years ended December 31, 2013, 2012 and 2011 is presented below.
		Year Ended December 31,
	(millions of dollars)	2013				2012			2011
	Income taxes at U.S. statutory rate of 35%	$	304.3			$	266.4		$	268.1
	Increases (decreases) resulting from:
	State taxes, net of federal benefit	2.3				2.2			1.1
	U.S. tax on non-U.S. earnings	(2.8		)		22.3			9.4
	Affiliates' earnings	(15.6		)		(15.0		)	(13.4		)
	Foreign rate differential	(73.4		)		(57.9		)	(60.0		)
	Tax holidays	(15.6		)		(27.0		)	(21.3		)
	Withholding taxes	15.4				12.3			10.9
	Impairments and write-offs	5.2				15.9			6.4
	Tax credits	(6.9		)		(2.3		)	(4.0		)
	Reserve adjustments, settlements and claims	0.5				12.9			(1.0		)
	Valuation allowance adjustments	(1.4		)		9.7			(5.3		)
	Other	6.3				(0.9		)	4.4
	Provision for income taxes, as reported	$	218.3			$	238.6		$	195.3
	The Company's provision for income taxes for the year ended December 31, 2013, includes tax benefits of $7.1 million, $3.8 million and $2.1 million related to restructuring expense, program termination agreement and retirement related obligations discussed in Note 3. This rate also includes a net tax benefit of $11.7 million, which is comprised of tax benefits of $6.7 million 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, $2.2 million related to 2012 provision to return and other tax adjustments and $8.0 million related to the reversal of certain state deferred tax asset valuation allowances, partially offset by a $5.2 million tax expense related to comprehensive income and other tax adjustments.
	The Company's provision for income taxes for the year ended December 31, 2012 includes a net tax benefit of $2.0 million associated with the loss from disposal activities and restructuring expense. The $2.0 million net benefit is comprised of a tax benefit of $7.7 million associated with restructuring expense, partially offset by tax expense of $5.7 million resulting from the sale of the spark plug business. The provision also includes additional tax expense of $19.8 million resulting from other tax adjustments. These other tax adjustments include $5.9 million of tax expense primarily resulting from the settlement of certain tax audits, $7.5 million of tax expense associated with the Company's second quarter 2012 decision to change its cash repatriation assertion for some of its foreign subsidiaries, $4.7 million of tax benefit related to certain countries enacting changes to their respective statutory income tax rates and $11.1 million of U.S. tax expense to correct the income taxes payable balance. The Company concluded this item was not material to the current or prior period financial statements.
	The Company's provision for income taxes for the year ended December 31, 2011 includes $11.0 million of tax expense associated with the Company's patent infringement settlement, $2.7 million of tax expense associated with the loss from disposal activities and a tax benefit of $6.2 million resulting from other tax adjustments. These other tax adjustments related to a change in state corporate income tax legislation as well as an adjustment of the Company's tax accounts as a result of the closure of certain tax audits. During 2011, several countries enacted changes to their respective statutory income tax rates. None of these changes had a material impact on the Company's effective tax rate.
	A roll forward of the Company's total gross unrecognized tax benefits for the years ended December 31, 2013 and 2012, respectively, is presented below. Of the total $22.9 million of unrecognized tax benefits as of December 31, 2013, approximately $15.7 million of the total represents the amount, if recognized, would affect the Company's effective income tax rate in future periods. This amount differs from the gross unrecognized tax benefits presented in the table due to the decrease in the U.S. federal income taxes which would occur upon recognition of the state tax benefits included therein.
	(millions of dollars)	2013				2012
	Balance, January 1	$	25.8			$	26.2
	Additions based on tax positions related to current year	1.7				2
	Additions for tax positions of prior years	12.5				13.4
	Reductions for closure of tax audits and settlements	(17.7		)		(14.6		)
	Reductions for lapse in statute of limitations	(0.2		)		(1.7		)
	Translation adjustment	0.8				0.5
	Balance, December 31	$	22.9			$	25.8
	The Company recognizes interest and penalties related to unrecognized tax benefits in income tax expense. The amount recognized in income tax expense for 2013 and 2012 is $1.0 million and $0.5 million, respectively. The Company has an accrual of approximately $8.4 million and $8.3 million for the payment of interest and penalties at December 31, 2013 and 2012, respectively. During the year ended December 31, 2013 the Company paid $14.9 million for the settlement of audits and resulting amended returns in certain foreign jurisdictions. Possible changes within the next 12 months related to other examinations cannot be reasonably estimated at this time.
	The Company and/or one of its subsidiaries files income tax returns in the U.S. federal, various state jurisdictions and various foreign jurisdictions. In certain tax jurisdictions, the Company may have more than one taxpayer. The Company is no longer subject to income tax examinations by tax authorities in its major tax jurisdictions as follows:
	Tax jurisdiction		Years no longer subject to audit		Tax jurisdiction		Years no longer subject to audit
	U.S. Federal		2010 and prior		Hungary		2008 and prior
	China		2007 and prior		Japan		2011 and prior
	France		2007 and prior		South Korea		2007 and prior
	Germany		2007 and prior		Sweden		2007 and prior
	The gross components of deferred tax assets and liabilities as of December 31, 2013 and 2012 consist of the following:
		December 31,
	(millions of dollars)	2013				2012
	Deferred tax assets:
	Foreign tax credits	$	145.9			$	146
	Employee compensation	40.6				53.1
	Other comprehensive income	79.3				113.7
Research and development capitalization	132.4				102.5
Net operating loss and capital loss carryforwards	46.4				44.3
Pension and other postretirement benefits	36.5				37.7
Other	75.8				44.1
Total deferred tax assets	$	556.9			$	541.4
Valuation allowance	(34.2		)		(35.0		)
Net deferred tax asset	$	522.7			$	506.4
Deferred tax liabilities:
Goodwill and intangible assets	(139.5		)		(130.9		)
Fixed assets	(105.4		)		(101.9		)
Other	(36.7		)		(25.6		)
Total deferred tax liabilities	$	(281.6	)		$	(258.4	)
Net deferred taxes	$	241.1			$	248
At December 31, 2013, certain non-U.S. subsidiaries have net operating loss carryforwards totaling $58.0 million available to offset future taxable income. Of the total $58.0 million, $48.4 million expire at various dates from 2014 through 2033 and the remaining $9.6 million have no expiration date. The Company has a valuation allowance of $1.5 million recorded on $4.9 million of non-U.S. net operating loss carryforwards. Certain U.S. subsidiaries have state net operating loss carryforwards totaling $501.4 million which are partially offset by a valuation allowance of $300.8 million. Certain non-U.S. subsidiaries located in China, Korea and Poland had tax exemptions or tax holidays, which reduced tax expense approximately $15.6 million and $26.7 million in 2013 and 2012, respectively. The tax holiday in Poland expired at the end of 2013. The U.S. has foreign tax credit carryforwards of $145.9 million, which expire at various dates from 2017 through 2020.
The Company is not required to provide U.S. federal or state income taxes on cumulative undistributed earnings of foreign subsidiaries when such earnings are considered permanently reinvested. The Company's policy is to evaluate this assertion on a quarterly basis. During the second quarter of 2012, the Company changed the assertion for some of its foreign subsidiaries to provide management additional financial flexibility. At December 31, 2013, the Company's deferred tax liability associated with unremitted foreign earnings was $18.7 million.
The Company has not recorded deferred income taxes on the difference between the book and tax basis of investments in foreign subsidiaries or foreign equity affiliates totaling approximately $2.3 billion in 2013, as these amounts are essentially permanent in nature. The difference will become taxable upon repatriation of assets, sale or liquidation of the investment. Due to fluctuation in tax laws around the world and fluctuations in foreign exchange rates, it is not practicable to determine the unrecognized deferred tax liability on this difference because the actual tax liability, if any, is dependent on circumstances existing when the repatriation occurs.

Balance_Sheet_Information

Balance Sheet Information	12 Months Ended
	Dec. 31, 2013
Balance Sheet Related Disclosures [Abstract]	'
Balance Sheet information	'
	BALANCE SHEET INFORMATION
	Detailed balance sheet data is as follows:
		December 31,
	(millions of dollars)	2013			2012
	Receivables, net:
	Customers	$	1,067.50		$	1,014.60
	Other	183.1			134.8
	Gross receivables	1,250.60			1,149.40
	Bad debt allowance(a)	(2.1		)	(2.1		)
	Total receivables, net	$	1,248.50		$	1,147.30
	Inventories, net:
	Raw material and supplies	$	279.8		$	264
	Work in progress	78			82
	Finished goods	116.3			117.6
	FIFO inventories	474.1			463.6
	LIFO reserve	(16.0		)	(16.0		)
	Total inventories, net	$	458.1		$	447.6
	Prepayments and other current assets:
	Prepaid tooling	$	37.1		$	39.1
	Prepaid taxes	12.3			0.7
	Derivatives	3.4			5.7
	Other	30.9			22
	Total prepayments and other current assets	$	83.7		$	67.5
	Property, plant and equipment, net:
	Land and land use rights	$	87.2		$	76.4
	Buildings	666.7			640.8
	Machinery and equipment	1,897.50			2,282.40
	Capital leases	2.4			2.3
	Construction in progress	272.3			243.7
	Property, plant and equipment, gross	2,926.10			3,245.60
	Accumulated depreciation	(1,099.3		)	(1,567.0		)
	Property, plant & equipment, net, excluding tooling	1,826.80			1,678.60
	Tooling, net of amortization	112.6			109.4
	Property, plant & equipment, net	$	1,939.40		$	1,788.00
	Investments and advances:
	Investment in equity affiliates	$	201.5		$	217.7
	Other investments and advances	203.6			165
	Total investments and advances	$	405.1		$	382.7
	Other non-current assets:
	Deferred income taxes	$	257.6		$	244.1
	Other intangible assets	169.5			206.3
	Product liability insurance asset	96.7			85.6
	Other	53.2			39.9
	Total other non-current assets	$	577		$	575.9
		December 31,
	(millions of dollars)	2013			2012
	Accounts payable and accrued expenses:
	Trade payables	$	872.6		$	815.4
	Trade payables for capital expenditures	62.8			39.8
	Payroll and employee related	184.6			180.7
	Customer related	49.7			36.3
	Product liability	41.1			36.5
	Product warranties	38.4			33.1
	Retirement related	21.8			27.9
	Dividends payable to noncontrolling shareholders	16.7			9.5
	Interest	12			11.7
	Severance	11.3			8.9
	Insurance	8.2			9.2
	Legal and professional fees	7.8			4.2
	Derivatives	7.4			9.8
	Current deferred income taxes	3.9			1.4
	Environmental	1.1			1.6
	Other	44.4			61.2
Total accounts payable and accrued expenses	$	1,383.80		$	1,287.20
Other non-current liabilities:
Deferred income taxes	$	81.3		$	89.4
Product liability	55.6			49.1
Deferred revenue	46.2			30.5
Product warranties	34.3			31.8
Cross-currency swaps and derivatives	24.3			58.1
Environmental	2.9			2.3
Other	82.2			56.9
Total other non-current liabilities	$	326.8		$	318.1
(a) Bad debt allowance:	2013			2012			2011
Beginning balance, January 1	$	(2.1	)	$	(4.3	)	$	(4.0	)
Provision	(0.3		)	(0.8		)	(1.4		)
Write-offs	0.4			3			1
Translation adjustment and other	(0.1		)	—			0.1
Ending balance, December 31	$	(2.1	)	$	(2.1	)	$	(4.3	)
As of December 31, 2013 and December 31, 2012, accounts payable of $62.8 million and $39.8 million, respectively, were related to property, plant and equipment purchases.
Interest costs capitalized for the years ended December 31, 2013 and 2012 were $11.9 million and $17.8 million, respectively.
NSK-Warner KK ("NSK-Warner")
The Company has a 50% interest in NSK-Warner, a joint venture based in Japan that manufactures automatic transmission components. The Company's share of the earnings reported by NSK-Warner is accounted for using the equity method of accounting. NSK-Warner is the joint venture partner with a 40% interest in the Drivetrain Group's South Korean subsidiary, BorgWarner Transmission Systems Korea Inc. Dividends from NSK-Warner were $31.0 million, $28.1 million and $33.4 million in calendar years ended December 31, 2013, 2012 and 2011, respectively.
NSK-Warner has a fiscal year-end of March 31. The Company's equity in the earnings of NSK-Warner consists of the 12 months ended November 30. Following is summarized financial data for NSK-Warner, translated using the ending or periodic rates, as of and for the years ended November 30, 2013, 2012 and 2011 (unaudited):
	November 30,
(millions of dollars)	2013			2012
Balance sheets:
Cash and securities	$	118.3		$	123.3
Current assets, including cash and securities	313.6			320
Non-current assets	156.1			175.3
Current liabilities	166.8			147.4
Non-current liabilities	40.7			50.2
Total equity	262.2			297.7
	Year Ended November 30,
(millions of dollars)	2013			2012			2011
Statements of operations:
Net sales	$	604		$	696.7		$	655.2
Gross profit	126.6			138.2			128.5
Net earnings	68.3			68.5			61.6
NSK-Warner had no debt outstanding as of November 30, 2013 and 2012. Purchases by the Company from NSK-Warner were $22.8 million, $22.8 million and $16.6 million for the years ended December 31, 2013, 2012 and 2011, respectively.

Goodwill_and_Other_Intangibles

Goodwill and Other Intangibles	12 Months Ended
	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and other intangibles	'
	GOODWILL AND OTHER INTANGIBLES
	During the fourth quarter of each year, the Company qualitatively assesses its goodwill and indefinite-lived intangible assets assigned to each of its reporting units. This qualitative assessment evaluates various events and circumstances, such as macro economic conditions, industry and market conditions, cost factors, relevant events and financial trends, that may impact a reporting unit's fair value. Using this qualitative assessment, the Company determines whether it is more-likely-than not the reporting unit's fair value exceeds its carrying value. If it is determined that it is not more-likely-than-not the reporting unit's fair value exceeds the carrying value, or upon a triggering event, including recent acquisition or divestiture activity, the Company performs a quantitative, "step one," goodwill impairment analysis.
	During the fourth quarter of 2013, the Company performed a qualitative analysis on each reporting unit and determined it was more-likely-than-not the fair value exceeded the carrying value of these reporting units. For the reporting unit with recent restructuring activity, the Company performed a quantitative, "step one," goodwill impairment analysis, which requires the Company to make significant assumptions and estimates about the extent and timing of future cash flows, discount rates and growth rates. The basis of this goodwill impairment analysis is the Company's annual budget and long-range plan (“LRP”). The annual budget and LRP includes a five year projection of future cash flows based on actual new products and customer commitments and assumes the last year of the LRP data is a fair indication of the future performance. Because the LRP is estimated over a significant future period of time, those estimates and assumptions are subject to a high degree of uncertainty. Further, the market valuation models and other financial ratios used by the Company require certain assumptions and estimates regarding the applicability of those models to the Company's facts and circumstances.
	The Company believes the assumptions and estimates used to determine its estimated fair value are reasonable. Different assumptions could materially affect the estimated fair value. The primary assumptions affecting the Company's December 31, 2013 goodwill quantitative, "step one," impairment review are as follows:
	•	Discount rate: The Company used a 10% weighted average cost of capital (“WACC”) as the discount rate for future cash flows. The WACC is intended to represent a rate of return that would be expected by a market participant.
	•	Operating income margin: The Company used historical and expected operating income margins, which may vary based on the projections of the reporting unit being evaluated.
	In addition to the above primary assumptions, the Company notes the following risks to volume and operating income assumptions that could have an impact on the discounted cash flow model:
	•	The automotive industry is cyclical and the Company's results of operations would be adversely affected by industry downturns.
	•	The Company is dependent on market segments that use our key products and would be affected by decreasing demand in those segments.
	•	The Company is subject to risks related to international operations.
	Based on the assumptions outlined above, the impairment testing conducted in the fourth quarter of 2013 indicated the Company's goodwill assigned to the reporting unit quantitatively assessed was not impaired. Additionally, a sensitivity analysis was completed indicating a 1% increase in the discount rate or a 1% decrease in the operating margin assumptions would not result in the carrying value exceeding the fair value of the reporting unit quantitatively assessed.
	The changes in the carrying amount of goodwill for the years ended December 31, 2013 and 2012 are as follows:
		2013						2012
	(millions of dollars)	Engine			Drivetrain			Engine			Drivetrain
	Gross goodwill balance, January 1	$	1,324.10		$	359.3		$	1,334.70		$	353.5
	Accumulated impairment losses, January 1	(501.8		)	(0.2		)	(501.8		)	(0.2		)
	Net goodwill balance, January 1	$	822.3		$	359.1		$	832.9		$	353.3
	Goodwill during the year:
	Divestitures*	(4.6		)	—			(16.9		)	—
	Translation adjustment and other	12.4			7.8			6.3			5.8
	Ending balance, December 31	$	830.1		$	366.9		$	822.3		$	359.1
	________________
	* Goodwill divested relates to the Company's 2012 sale of the spark plug business.
	The Company’s other intangible assets, primarily from acquisitions, consist of the following:
		December 31, 2013									December 31, 2012
	(millions of dollars)	Gross			Accumulated			Net			Gross			Accumulated		Net
		carrying			amortization			carrying			carrying			amortization		carrying
		amount						amount			amount					amount
	Amortized intangible assets:
	Patented and unpatented technology	$	85.9		$	36.5		$	49.4		$	80		$	26.2	$	53.8
	Customer relationships	201.8			111.4			90.4			216.3			100		116.3
	Miscellaneous	2.9			2.9			—			2.9			2.9		—
	Total amortized intangible assets	290.6			150.8			139.8			299.2			129.1		170.1
	In-process R&D	10.8			—			10.8			10.8			—		10.8
	Unamortized trade names	18.9			—			18.9			25.4			—		25.4
	Total other intangible assets	$	320.3		$	150.8		$	169.5		$	335.4		$	129.1	$	206.3
	Amortization of other intangible assets was $26.7 million, $28.4 million and $30.8 million for the years ended December 31, 2013, 2012 and 2011, respectively. The estimated useful lives of the Company's amortized intangible assets range from three to 15 years. The Company utilizes the straight line method of amortization recognized over the estimated useful lives of the assets. The estimated future annual amortization expense, primarily for acquired intangible assets, is as follows: $25.4 million in 2014, $16.4 million in 2015, $16.3 million in 2016, $14.9 million in 2017 and $13.3 million in 2018.
	A roll forward of the gross carrying amounts of the Company's other intangible assets is presented below:
	(millions of dollars)	2013			2012
	Beginning balance, January 1	$	335.4		$	341.7
	Impairment*	(26.4		)	—
	Divestitures**	(1.1		)	(15.7		)
	Translation adjustment	12.4			9.4
	Ending balance, December 31	$	320.3		$	335.4
	________________
	*	Impairment relates to Drivetrain customer relationships and Engine unamortized trade names. The impairment charges are recorded in restructuring expense in Other expense (income).
	**	Divestitures relate to the Company's 2012 sale of the spark plug business.
	A roll forward of the accumulated amortization associated with the Company's other intangible assets is presented below:
	(millions of dollars)	2013			2012
	Beginning balance, January 1	$	129.1		$	98.4
	Amortization	26.7			28.4
	Impairment*	(13.9		)	—
	Divestitures**	(0.4		)	(0.6		)
	Translation adjustment	9.3			2.9
	Ending balance, December 31	$	150.8		$	129.1
	________________
	*	Impairment relates to Drivetrain customer relationships and Engine unamortized trade names. The impairment charges are recorded in restructuring expense in Other expense (income).
	** Divestitures relate to the Company's 2012 sale of the spark plug business.

Product_Warranty

Product Warranty	12 Months Ended
	Dec. 31, 2013
Product Warranties Disclosures [Abstract]	'
Product warranty	'
	PRODUCT WARRANTY
	The changes in the carrying amount of the Company’s total product warranty liability for the years ended December 31, 2013 and 2012 were as follows:
	(millions of dollars)	2013			2012
	Beginning balance, January 1	$	64.9		$	72.7
	Provisions	43.1			33.7
	Payments	(36.7		)	(42.8		)
	Translation adjustment	1.4			1.3
	Ending balance, December 31	$	72.7		$	64.9
	The product warranty liability is classified in the Consolidated Balance Sheets as follows:
		December 31,
	(millions of dollars)	2013			2012
	Accounts payable and accrued expenses	$	38.4		$	33.1
	Other non-current liabilities	34.3			31.8
	Total product warranty liability	$	72.7		$	64.9

Notes_Payable_and_LongTerm_Deb

Notes Payable and Long-Term Debt	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Notes payable and long-term debt	'
	NOTES PAYABLE AND LONG-TERM DEBT
	As of December 31, 2013 and 2012, the Company had short-term and long-term debt outstanding as follows:
		December 31,
	(millions of dollars)	2013		2012
	Short-term debt
	Short-term borrowings	$	84.8	$	129.1
	Receivables securitization	110		110
	Total short-term debt	$	194.8	$	239.1
	Long-term debt
	5.75% Senior notes due 11/01/16 ($150 million par value)	$	149.7	$	149.6
	8.00% Senior notes due 10/01/19 ($134 million par value)	133.9		133.9
	4.625% Senior notes due 09/15/20 ($250 million par value)	248.2		247.9
	7.125% Senior notes due 02/15/29 ($121 million par value)	119.4		119.4
	Multi-currency revolving credit facility	320		140
	Term loan facilities and other	40.4		17.1
	Unamortized portion of debt derivatives	16.2		20.2
	Total long-term debt	$	1,027.80	$	828.1
	Less: current portion	6.8		4.3
	Long-term debt, net of current portion	$	1,021.00	$	823.8
	The weighted average interest rate on all borrowings outstanding as of December 31, 2013 and 2012 was 3.7% and 4.0%, respectively.
	Annual principal payments required as of December 31, 2013 are as follows :
	(millions of dollars)
	2014	$	201.6
	2015	25.1
	2016	478.5
	2017	—
	2018	—
	After 2018	520.9
	Total payments	$	1,226.10
	Less: unamortized discounts	3.5
	Total	$	1,222.60
	The Company's long-term debt includes various financial covenants, none of which are expected to restrict future operations.
	The Company's multi-currency revolving credit facility includes a feature that allows the Company's borrowings to be increased to $1 billion. Utilizing this feature, on April 12, 2013, the Company increased its multi-currency revolving credit facility from $650 million to $750 million. The credit facility provides for borrowings through June 30, 2016 and is guaranteed by the Company's material domestic subsidiaries. The Company has two key financial covenants, a debt compared to EBITDA (“Earnings Before Interest, Taxes, Depreciation and Amortization”) test and an interest coverage test. The Company was in compliance with all covenants at December 31, 2013 and expects to remain compliant in future periods. At December 31, 2013 and 2012, the Company had outstanding borrowings of $320.0 million and $140.0 million, respectively, under this facility.
	On April 9, 2009, the Company issued $373.8 million in convertible senior notes, which were settled in April 2012 by delivering approximately 22.8 million shares of common stock held in treasury to the note holders. The settlement resulted in a reduction in the current portion of long-term debt of $373.8 million, a reduction in common stock held in treasury of $617.3 million and a reduction in capital in excess of par value of $243.5 million. Prior to the settlement, the Company accreted the discounted carrying value of the convertible notes to their face value over the term of the notes.
	The total interest expense related to the convertible senior notes in the Company’s Consolidated Statements of Operations for the years ended December 31, 2013, 2012 and 2011 was as follows:
		Year Ended December 31,
	(millions of dollars)	2013		2012		2011
	Interest expense	$	—	$	9	33.1
	Non-cash portion	—		5.3		20
	In conjunction with the convertible senior note offering, the Company entered into a bond hedge overlay, including both call options and warrants, at a net pre-tax cost of $25.2 million, effectively raising the conversion premium to 50%, or approximately $19.31 per share. On April 16, 2012, the Company settled the call option portion of the bond hedge overlay, receiving approximately 13.0 million shares of its common stock. The settlement resulted in an increase to common stock held in treasury of $503.9 million offset by an increase to capital in excess of par value of $503.9 million.
	During the third and fourth quarters of 2012, the Company settled the warrants included in the bond hedge overlay, delivering approximately 9.8 million shares of its common stock held in treasury, resulting in a decrease to common stock held in treasury of $338.5 million offset by a decrease to capital in excess of par value of $338.5 million.
	As of December 31, 2013 and 2012, the estimated fair values of the Company's senior unsecured notes totaled $729.7 million and $770.3 million, respectively. The estimated fair values were $78.5 million and $119.5 million higher than their carrying value at December 31, 2013 and 2012, 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 value of the Company's multi-currency revolving credit facility is equal to its 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 $27.8 million and $59.1 million at December 31, 2013 and 2012, 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	12 Months Ended
	Dec. 31, 2013
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 December 31, 2013 and 2012:
				Basis of fair value measurements
		Balance at December 31, 2013		Quoted prices in active markets for identical items		Significant other observable inputs		Significant unobservable inputs		Valuation technique
	(millions of dollars)			(Level 1)		(Level 2)		(Level 3)
	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
				Basis of fair value measurements
	(millions of dollars)	Balance at December 31, 2012		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	$	5.9	$	—	$	5.9	$	—	A
	Other non-current assets (insurance settlement agreement note receivable)	$	41	$	—	$	41	$	—	C
	Liabilities:
	Foreign currency contracts	$	9.8	$	—	$	9.8	$	—	A
	Net investment hedge contracts	$	58.1	$	—	$	58.1	$	—	A
	The following tables classify the Company's defined benefit plan assets measured at fair value on a recurring basis as of December 31, 2013 and 2012:
				Basis of fair value measurements
	(millions of dollars)	Balance at December 31, 2013		Quoted prices in active markets for identical items		Significant other observable inputs		Significant unobservable inputs		Valuation technique
				(Level 1)		(Level 2)		(Level 3)
	U.S. Plans:
	Fixed income securities	$	147.2	$	—	$	147.2	$	—	A
	Equity securities	100.9		50.5		50.4		—		A
	Real estate and other	26		—		26		—		A
		$	274.1	$	50.5	$	223.6	$	—
	Non-U.S. Plans:
	Fixed income securities	$	143.7	$	—	$	143.7	$	—	A
	Equity securities	188.2		70.5		117.7		—		A
	Real estate and other	13.1		—		13.1		—		A
		$	345	$	70.5	$	274.5	$	—
				Basis of fair value measurements
	(millions of dollars)	Balance at December 31, 2012		Quoted prices in active markets for identical items		Significant other observable inputs		Significant unobservable inputs		Valuation technique
				(Level 1)		(Level 2)		(Level 3)
	U.S. Plans:
	Fixed income securities	$	157.4	$	—	$	157.4	$	—	A
	Equity securities	100		48.9		51.1		—		A
	Real estate and other	25.3		—		25.3		—		A
		$	282.7	$	48.9	$	233.8	$	—
	Non-U.S. Plans:
	Fixed income securities	$	67.3	$	—	$	67.3	$	—	A
	Equity securities	99		—		99		—		A
	Real estate and other	11.6		—		11.6		—		A
		$	177.9	$	—	$	177.9	$	—
	Refer to Note 11 to the Consolidated Financial Statements for more detail surrounding the defined plan’s asset investment policies and strategies, target allocation percentages and expected return on plan asset assumptions.

Financial_Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2013
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 December 31, 2013 and 2012, 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 our net investment in certain foreign operations (net investment hedges). At December 31, 2013 and 2012, the following cross-currency swaps were outstanding:
		Cross-currency swaps
	(millions of dollars)	Notional				Notional				Duration
		in USD				in 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 December 31, 2013 and 2012.
	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 December 31, 2013 and 2012, 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
					31-Dec-13			31-Dec-12
	Brazilian real		US dollar		19.3			—			14-Dec
	British pound		Euro		—			28.8			13-Dec
	Chinese yuan		Japanese yen		215			—			14-Feb
	Chinese yuan		US dollar		12.3			—			14-Dec
	Euro		British pound		3			4.7			14-Dec
	Euro		Hungarian forint		6,430.50			9,300.00			14-Dec
	Euro		Japanese yen		5,830.70			6,760.00			14-Dec
	Euro		Korean won		663.1			—			14-Jul
	Euro		Polish zloty		96			87.4			14-Dec
	Euro		US dollar		29.4			15.2			14-Dec
	Hungarian forint		Euro		6.6			—			14-Dec
	Japanese yen		Chinese yuan		84			—			14-Dec
	Japanese yen		Korean Won		5,715.50			—			14-Dec
	Japanese yen		US dollar		4.2			9.5			14-Dec
	Korean won		Euro		23.6			32.4			14-Dec
	Korean won		Japanese yen		380.5			—			14-Aug
	Korean won		US dollar		—			17.5			13-Dec
	Mexican peso		US dollar		—			20.9			13-Dec
	Swedish krona		Euro		33.7			—			14-Dec
	US dollar		Indian rupee		—			111.1			13-Oct
	US dollar		Japanese yen		3,209.30			3,000.00			14-Sep
	At December 31, 2013 and 2012, the following amounts were recorded in the Consolidated Balance Sheets as being payable to or receivable from counterparties under ASC Topic 815:
		Assets										Liabilities
	(millions of dollars)	Location		December 31, 2013				December 31, 2012				Location		December 31, 2013				December 31, 2012
	Foreign currency	Prepayments and other current assets		$	3.4			$	5.7			Accounts payable and accrued expenses		$	7.4			$	9.8
		Other non-current assets		$	—			$	0.2			Other non-current liabilities		$	—			$	—
	Net investment hedges	Other non-current assets		$	—			$	—			Other non-current liabilities		$	24.3			$	58.1
	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 December 31, 2013 market rates.
			Deferred gain (loss) in AOCI at								Gain (loss) expected to be reclassified to income in one year or less
	(millions of dollars)		December 31, 2013				December 31, 2012
	Foreign currency		$	(3.7	)		$	(3.5	)		$	(3.7	)
	Net investment hedges		(22.1		)		(54.5		)		—
	Total		$	(25.8	)		$	(58.0	)		$	(3.7	)
	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 from AOCI to income										Gain (loss) recognized in income
					(effective portion)										(ineffective portion)
					Year Ended December 31,										Year Ended December 31,
	(millions of dollars)		Location		2013				2012				Location		2013				2012
	Foreign currency		Sales		$	1.7			$	5.3			SG&A expense		$	0.2			$	—
	Foreign currency		Cost of goods sold		$	(13.9	)		$	3.5			SG&A expense		$	(1.5	)		$	0.1
	Foreign currency		SG&A expense		$	(0.4	)		$	—			SG&A expense		$	—			$	—
	Net investment hedges		N/A										Interest expense		$	1.3			$	2.3
	At December 31, 2013, derivative instruments that were not designated as hedging instruments as defined by ASC Topic 815 were immaterial.

Retirement_Benefit_Plans

Retirement Benefit Plans	12 Months Ended
	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]	'
Retirement benefit plans	'
	RETIREMENT BENEFIT PLANS
	The Company sponsors various defined contribution savings plans, primarily in the U.S., that allow employees to contribute a portion of their pre-tax and/or after-tax income in accordance with plan specified guidelines. Under specified conditions, the Company will make contributions to the plans and/or match a percentage of the employee contributions up to certain limits. Total expense related to the defined contribution plans was $24.9 million, $24.8 million and $18.9 million in the years ended December 31, 2013, 2012 and 2011, respectively.
	The Company has a number of defined benefit pension plans and other postretirement employee benefit plans covering eligible salaried and hourly employees and their dependents. The defined pension benefits provided are primarily based on (i) years of service and (ii) average compensation or a monthly retirement benefit amount. The Company provides defined benefit pension plans in France, Germany, Ireland, Italy, Japan, Mexico, Monaco, South Korea, Sweden, U.K. and the U.S. The other postretirement employee benefit plans, which provide medical and life insurance benefits, are unfunded plans. All pension and other postretirement employee benefit plans in the U.S. have been closed to new employees since 1999. The measurement date for all plans is December 31.
	On February 26, 2009, the Company's subsidiary BorgWarner Diversified Transmission Products Inc. ("DTP"), entered into a Plant Shutdown Agreement with the United Auto Workers ("UAW") for its Muncie, Indiana automotive component plant (the "Muncie Plant"). Management subsequently wound-down production activity at the plant, with operations effectively ceased as of March 31, 2009. The Plant Shutdown Agreement included terms allowing for lump sum payment of the pension obligation for certain participants if funding of the plan exceeded a defined level. In accordance with these terms, in December 2012, the Company settled a portion of the pension obligation resulting in a non-cash loss of $5.7 million, which was recorded in other expense (income) within the Consolidated Statement of Operations.
	On March 24, 2010, the Company finalized its settlement agreement regarding the closure of the Muncie Plant with the Pension Benefit Guaranty Corporation ("PBGC") in which the Company agreed to make certain payments directly to the Muncie Plant's defined benefit pension plan (the “Plan”). In accordance with the settlement agreement, the Company made an initial cash contribution of $23 million for the 2009 Plan year and a cash contribution of $15 million in the year ended December 31, 2011. During the fourth quarter of 2012, the Company received notification from the PBGC that the terms of the settlement have been suspended pending review of the Company's financial strength under the PBGC's revised enforcement policy pilot program announced on November 2, 2012. The evaluation was confirmed in January 2013 and as a result the Company currently does not have any obligations as described in the original agreement.
	The following table summarizes the expenses for the Company's defined contribution and defined benefit pension plans and the other postretirement defined employee benefit plans.
		Year Ended December 31,
	(millions of dollars)	2013				2012			2011
	Defined contribution expense	$	24.9			$	24.8		$	18.9
	Defined benefit pension expense	24.3				27.3			17.5
	Other postretirement employee benefit expense	5.7				11.1			13.5
	Total	$	54.9			$	63.2		$	49.9
	The following provides a roll forward of the plans’ benefit obligations, plan assets, funded status and recognition in the Consolidated Balance Sheets.
		Pension benefits													Other postretirement
		Year Ended December 31,													employee benefits
		2013							2012						Year Ended December 31,
	(millions of dollars)	US				Non-US			US			Non-US			2013			2012
	Change in projected benefit obligation:
	Projected benefit obligation, January 1	$	330.1			$	447.6		$	337.4		$	344.3		$	220.5		$	251
	Service cost	—				12.4			—			9.1			0.4			0.5
	Interest cost	11.6				16.6			14.3			17.2			6.8			10.1
	Plan participants’ contributions	—				0.4			—			0.5			—			—
	Plan amendments	—				0.6			—			—			—			(0.3		)
	Actuarial (gain) loss	(18.7		)		11.8			15.5			84.1			(29.7		)	(20.7		)
	Currency translation	—				10.6			—			11.3			—			—
	Other	—				(2.7		)	—			(4.5		)	—			—
	Benefits paid	(29.4		)		(14.6		)	(37.1		)	(14.4		)	(20.5		)	(20.1		)
	Projected benefit obligation, December 31	$	293.6			$	482.7		$	330.1		$	447.6		$	177.5		$	220.5
	Change in plan assets:
	Fair value of plan assets, January 1	$	282.7			$	177.9		$	290.4		$	154.9
	Actual return on plan assets	20.8				23.6			29.4			15
	Employer contribution	—				150.4			—			18
	Plan participants’ contribution	—				0.4			—			0.5
	Currency translation	—				7.7			—			6
	Other	—				(0.4		)	—			(2.1		)
	Benefits paid	(29.4		)		(14.6		)	(37.1		)	(14.4		)
	Fair value of plan assets, December 31	$	274.1			$	345		$	282.7		$	177.9
	Funded status	$	(19.5	)		$	(137.7	)	$	(47.4	)	$	(269.7	)	$	(177.5	)	$	(220.5	)
	Amounts in the Consolidated Balance Sheets consist of:
	Current liabilities	$	(0.1	)		$	(2.6	)	$	(0.1	)	$	(7.0	)	$	(19.1	)	$	(20.8	)
	Non-current liabilities	(19.4		)		(135.1		)	(47.3		)	(262.7		)	(158.4		)	(199.7		)
	Net amount	$	(19.5	)		$	(137.7	)	$	(47.4	)	$	(269.7	)	$	(177.5	)	$	(220.5	)
	Amounts in accumulated other comprehensive loss consist of:
	Net actuarial loss	$	115			$	130.6		$	163.8		$	135.1		$	44		$	78.7
	Net prior service cost (credit)	9.7				1.1			(10.5		)	0.5			(36.1		)	(42.6		)
	Net amount*	$	124.7			$	131.7		$	153.3		$	135.6		$	7.9		$	36.1
	Total accumulated benefit obligation for all plans	$	293.6			$	464.8		$	330.1		$	430.2
	________________
	*	AOCI shown above does not include our equity investee, NSK-Warner. NSK-Warner had an AOCI loss of $4.9 million and $7.9 million at December 31, 2013 and 2012, respectively.
	The funded status of pension plans with accumulated benefit obligations in excess of plan assets at December 31 is as follows:
		December 31,
	(millions of dollars)	2013				2012
	Accumulated benefit obligation	$	(752.0	)		$	(757.7	)
	Plan assets	612.7				458
	Deficiency	$	(139.3	)		$	(299.7	)
	Pension deficiency by country:
	United States	$	(19.5	)		$	(47.4	)
	United Kingdom	(15.3		)		(22.4		)
	Germany	(68.6		)		(192.4		)
	Other	(35.9		)		(37.5		)
	Total pension deficiency	$	(139.3	)		$	(299.7	)
	The weighted average asset allocations of the Company’s funded pension plans and target allocations by asset category are as follows:
		December 31,						Target Allocation
	2013			2012
U.S. Plans:
Real estate and other	9	%		9	%		5%-15%
Fixed income securities	54	%		56	%		45%-65%
Equity securities	37	%		35	%		25%-45%
	100	%		100	%
Non-U.S. Plans:
Real estate and other	4	%		6	%		0% - 7%
Fixed income securities	42	%		38	%		37% - 47%
Equity securities	54	%		56	%		51% - 61%
	100	%		100	%
The Company's investment strategy is to maintain actual asset weightings within a preset range of target allocations. The Company believes these ranges represent an appropriate risk profile for the planned benefit payments of the plans based on the timing of the estimated benefit payments. In each asset category, separate portfolios are maintained for additional diversification. Investment managers are retained in each asset category to manage each portfolio against its benchmark. Each investment manager has appropriate investment guidelines. In addition, the entire portfolio is evaluated against a relevant peer group. The defined benefit pension plans did not hold any Company securities as investments as of December 31, 2013 and 2012. A portion of pension assets is invested in common and comingled trusts.
In December 2013, the Company made a discretionary contribution of $137.5 million to its German pension plans. The Company expects to contribute a total of $15 million to $25 million into its defined benefit pension plans during 2014. Of the $15 million to $25 million in projected 2014 contributions, $2.8 million are contractually obligated, while any remaining payments would be discretionary.
Refer to Note 9, “Fair Value Measurements," for more detail surrounding the fair value of each major category of plan assets as well as the inputs and valuation techniques used to develop the fair value measurements of the plans' assets at December 31, 2013 and 2012.
See the table below for a breakout of net periodic benefit cost between U.S. and non-U.S. pension plans:
	Pension benefits																			Other postretirement employee benefits
	Year Ended December 31,
	2013							2012						2011						Year Ended December 31,
(millions of dollars)	US				Non-US			US			Non-US			US			Non-US			2013			2012			2011
Service cost	$	—			$	12.4		$	—		$	9.1		$	—		$	9.1		$	0.4		$	0.5		$	0.7
Interest cost	11.6				16.6			14.3			17.2			16.1			17.8			6.8			10.1			11.8
Expected return on plan assets	(18.2		)		(11.0		)	(18.8		)	(9.3		)	(20.8		)	(11.2		)	—			—			—
Settlements, curtailments and other	—				0.2			5.7			0.5			—			(0.1		)	—			—			—
Amortization of unrecognized prior service benefit	(0.8		)		—			(0.7		)	—			(0.7		)	—			(6.4		)	(6.4		)	(6.9		)
Amortization of unrecognized loss	8.2				5.3			8.1			1.2			6.5			0.8			4.9			6.9			7.9
Net periodic benefit cost	$	0.8			$	23.5		$	8.6		$	18.7		$	1.1		$	16.4		$	5.7		$	11.1		$	13.5
The estimated net loss for the defined benefit pension plans that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost over the next fiscal year is $11.3 million. The estimated net loss and prior service credit for the other postretirement plans that will be amortized from accumulated other comprehensive income (loss) into net periodic benefit cost over the next fiscal year are $2.7 million and $(6.4) million, respectively.
The Company's weighted-average assumptions used to determine the benefit obligations for its defined benefit pension and other postretirement employee benefit plans as of December 31, 2013 and 2012 were as follows:
	December 31,
(percent)	2013		2012
U.S. pension plans:
Discount rate	4.41		3.67
Rate of compensation increase	N/A		N/A
U.S. other postretirement employee benefit plans:
Discount rate	4		3.25
Rate of compensation increase	N/A		N/A
Non-U.S. pension plans:
Discount rate	3.9		3.86
Rate of compensation increase	2.77		2.72
The Company’s weighted-average assumptions used to determine the net periodic benefit cost for its defined benefit pension and other postretirement employee benefit plans for the years ended December 31, 2013, 2012 and 2011 were as follows:
	Year Ended December 31,
(percent)	2013		2012		2011
U.S. pension plans:
Discount rate	3.67		4.42		5.17
Rate of compensation increase	N/A		N/A		N/A
Expected return on plan assets	6.75		6.75		7.5
U.S. other postretirement plans:
Discount rate	3.25		4.25		4.75
Rate of compensation increase	N/A		N/A		N/A
Expected return on plan assets	N/A		N/A		N/A
Non-U.S. pension plans:
Discount rate	3.86		5.13		5.37
Rate of compensation increase	2.72		2.78		2.8
Expected return on plan assets	6.42		6.49		7.07
The Company's approach to establishing the discount rate is based upon the market yields of high-quality corporate bonds, with appropriate consideration of each plan's defined benefit payment terms and duration of the liabilities.
The Company determines its expected return on plan asset assumptions by evaluating estimates of future market returns and the plans' asset allocation. The Company also considers the impact of active management of the plans' invested assets.
The estimated future benefit payments for the pension and other postretirement employee benefits are as follows:
		Pension benefits							Other postretirement employee benefits
(millions of dollars)									w/o Medicare Part D reimbursements			with Medicare Part D reimbursements
Year		U.S.				Non-U.S.
2014		$	24			$	17.4		$	19.5		$	19.5
2015		23.1				20.7			18.7			18.7
2016		23				19.3			17.7			17.7
2017		22.2				20.6			17.1			17.1
2018		22.4				21.8			16.6			16.6
2019-2023		103.2				118.4			65.6			65.6
The weighted-average rate of increase in the per capita cost of covered health care benefits is projected to be 7.10% in 2014 for pre-65 and post-65 participants, decreasing to 5.0% by the year 2019. A one-percentage point change in the assumed health care cost trend would have the following effects:
	One Percentage Point
(millions of dollars)	Increase				Decrease
Effect on other postretirement employee benefit obligation	$	12.6			$	(10.9	)
Effect on total service and interest cost components	$	0.5			$	(0.5	)

Stock_Incentive_Plans

Stock Incentive Plans	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock incentive plans	'
	STOCK INCENTIVE PLANS
	Under the Company's 1993 Stock Incentive Plan (“1993 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 had a term of 10 years from date of grant. As of December 31, 2003, there were no options available for future grants under the 1993 Plan and all options granted under the 1993 Plan were previously exercised, forfeited or expired as of December 31, 2013. The 1993 Plan expired at the end of 2003 and was replaced by the Company's 2004 Stock Incentive Plan. Under this plan, 25.0 million shares were authorized for grant, of which approximately 3.1 million shares remained available for future issuance as of December 31, 2013.
	Stock Options A summary of the plans’ shares under option at December 31, 2013, 2012 and 2011 is as follows:
		Shares (thousands)		Weighted average exercise price			Weighted average remaining contractual life		Aggregate intrinsic value
							(in years)		(in millions)
	Outstanding at January 1, 2011	6,506		$	14.32		4.9		$	142.2
	Exercised	(2,066	)	$	13.58				$	48.4
	Outstanding at December 31, 2011	4,440		$	14.68		4.1		$	76.3
	Exercised	(1,568	)	$	13.43				$	40.1
	Outstanding at December 31, 2012	2,872		$	15.33		3.4		$	58.8
	Exercised	(870	)	$	14.17				$	25.5
	Forfeited	(5	)	$	17.48
	Outstanding at December 31, 2013	1,997		$	15.82		2.6		$	80
	Options exercisable at December 31, 2013	1,997		$	15.82		2.6		$	80
	Proceeds from stock option exercises for the years ended December 31, 2013, 2012 and 2011 were as follows:
		Year Ended December 31,
	(millions of dollars)	2013			2012			2011
	Proceeds from stock options exercised — gross	$	12.3		$	20.9		$	28.6
	Tax benefit	20.7			31.1			24.4
	Proceeds from stock options exercised, net of tax	$	33		$	52		$	53
	Restricted Stock 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.
	The value of restricted stock is determined by the market value of the Company’s common stock at the date of grant. In 2013, restricted stock in the amount of 746,394 and 28,280 shares was granted to employees and non-employee directors, respectively, under the 2004 Stock Incentive Plan.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.
	Restricted stock compensation expense recorded in the Consolidated Statements of Operations is as follows:
		Year Ended December 31,
	(millions of dollars, except per share data)	2013			2012			2011
	Restricted stock compensation expense	$	25.8		$	21.2		$	15.1
	Restricted stock compensation expense, net of tax	$	18.8		$	15.5		$	11.4
	A summary of the status of the Company’s nonvested restricted stock for employees and non-employee directors at December 31, 2013, 2012 and 2011 is as follows:
		Shares subject to restriction		Weighted average price
		(thousands)
	Nonvested at January 1, 2011	3,742		$	15.28
	Granted	548		$	35.29
	Vested	(1,218	)	$	13.7
	Forfeited	(212	)	$	19.03
	Nonvested at December 31, 2011	2,860		$	19.51
	Granted	676		$	39.21
	Vested	(1,350	)	$	13.72
	Forfeited	(122	)	$	27.18
	Nonvested at December 31, 2012	2,064		$	29.39
	Granted	782		$	37.82
	Vested	(1,322	)	$	24.36
	Forfeited	(113	)	$	36.59
	Nonvested at December 31, 2013	1,411		$	37.86
	Performance Share Plans The 2004 Stock Incentive Plan provides for awarding of performance shares to members of senior management at the end of successive three-year periods based on the Company's performance in terms of total shareholder return relative to a peer group of automotive companies. In the first quarter of 2012, the Company modified all outstanding Performance Share Award Agreements to allow for the payment of these awards entirely in the Company's common stock, rather than 40% in cash and 60% in the Company's common stock. Using the lattice model (Monte Carlo simulation) at the date of modification, the Company determined the first quarter 2012 compensation expense associated with the modification to be negligible. Within the Consolidated Statement of Cash Flows for the year ended December 31, 2011, the Company's $19.6 million of expense associated with the 40% cash portion of the award was included in the changes in accounts payable and accrued expenses and other non-current assets and liabilities line items.
	The Company recognizes compensation expense relating to its performance share plans ratably over the performance period. Prior to the modification, compensation expense for the 60% stock component was based on the performance share's fair value at the date of grant using a lattice model (Monte Carlo simulation) and the 40% cash component was based on quarterly mark to market of the cash liability on a quarterly basis. After the first quarter 2012 modification, 100% of compensation expense associated with the performance share plans is calculated using a lattice model (Monte Carlo simulation). The amounts expensed under the plan and the share issuances for the three-year measurement periods ended December 31, 2013, 2012 and 2011 were as follows:
		Year Ended December 31,
	(millions of dollars, except share data)	2013			2012			2011
	Expense	$	10.8		$	35.5		$	26.3
	Number of shares*	545,375			1,116,000			1,076,360
	________________
	*Shares are issued in February of the following year.
	The restricted stock and performance share compensation expense disclosed above includes $5.5 million and $7.0 million of expense for the years ended December 31, 2013 and 2012, respectively, related to the Company's fourth quarter 2012 decision to waive the forfeiture provisions of existing restricted stock and performance share grants made to certain retiring NEOs. The Company recorded this expense within other expense (income) in the Consolidated Statements of Operations.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Loss) (Notes)	12 Months Ended
	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Comprehensive Income (Loss) Note [Text Block]	'
	The following table summarizes the activity within accumulated other comprehensive income (loss) during the years ended December 31, 2013, 2012 and 2011:
	(millions of dollars)	Foreign currency translation adjustments			Hedge instruments			Defined benefit postretirement plans			Other			Total
	Beginning Balance, January 1, 2011	$	148		$	(44.8	)	$	(158.1	)	$	1.2		$	(53.7	)
	Comprehensive (loss) income before reclassifications	(62.2		)	(9.2		)	(47.3		)	(0.1		)	(118.8		)
	Income taxes associated with comprehensive (loss) income before reclassifications	—			3			13.3			—			16.3
	Reclassification from accumulated other comprehensive (loss) income	—			1.5			7.6			—			9.1
	Income taxes reclassified into net earnings	—			(1.0		)	(2.7		)	—			(3.7		)
	Ending Balance December 31, 2011	$	85.8		$	(50.5	)	$	(187.2	)	$	1.1		$	(150.8	)
	Comprehensive (loss) income before reclassifications	38.2			30.3			(60.8		)	(0.2		)	7.5
	Income taxes associated with comprehensive (loss) income before reclassifications	—			(10.4		)	16.2			—			5.8
	Reclassification from accumulated other comprehensive (loss) income	16.8			(8.8		)	9.1			—			17.1
	Income taxes reclassified into net earnings	—			2.2			(3.1		)	—			(0.9		)
	Ending Balance December 31, 2012	$	140.8		$	(37.2	)	$	(225.8	)	$	0.9		$	(121.3	)
	Comprehensive (loss) income before reclassifications	40.3			19.6			52.5			1.5			113.9
	Income taxes associated with comprehensive (loss) income before reclassifications	—			(8.1		)	(15.8		)	—			(23.9		)
	Reclassification from accumulated other comprehensive (loss) income	—			12.6			11.2			—			23.8
	Income taxes reclassified into net earnings	—			(2.9		)	(3.6		)	—			(6.5		)
	Ending Balance December 31, 2013	$	181.1		$	(16.0	)	$	(181.5	)	$	2.4		$	(14.0	)

Contingencies

Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Contingencies	'
	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. A decision on the merits of the suit could be rendered sometime in 2014.
	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 32 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 $4.0 million and $3.9 million at December 31, 2013 and 2012, 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. In 2007 and 2008, lawsuits were filed against Kuhlman Electric and others, including the Company, on behalf of approximately 340 plaintiffs alleging personal injury relating to alleged environmental contamination at its Crystal Springs, Mississippi plant. The Company entered into a settlement in July 2010 regarding the personal injury claims of the plaintiffs and those of approximately 2,700 unfiled claimants represented by those plaintiffs' attorneys. In exchange for, among other things, the dismissal with prejudice of these lawsuits and the release of claims by the unfiled claimants, the Company agreed to pay up to $28 million in settlement funds, which was expensed in the second quarter of 2010. The Company paid $13.9 million in November 2010 and made the final payment of $13.9 million in February 2011. Litigation concerning indemnification is 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 December 31, 2013 and 2012, the Company had approximately 17,000 and 16,000 pending asbestos-related product liability claims, respectively. Of the approximately 17,000 outstanding claims at December 31, 2013, 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 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. In the full year of 2012, of the approximately 2,400 claims resolved, 308 (13%) resulted in any 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 the 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 $278.4 million in defense and indemnity in advance of insurers' reimbursement and has received $124.8 million in cash and notes from insurers. The net balance of $153.6 million, is expected to be fully recovered, of which approximately $20 million is expected to be recovered within one year. Timing of recovery is dependent on final resolution of the declaratory judgment action referred to above or additional negotiated settlements. At December 31, 2012, insurers owed $111.0 million in association with these claims.
	In addition to the $153.6 million net balance relating to past settlements and defense costs, the Company has estimated a liability of $96.7 million for claims asserted, but not yet resolved and their related defense costs at December 31, 2013. The Company also has a related asset of $96.7 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, more-likely-than-not, will occur subsequent to December 31, 2014. At December 31, 2012, the comparable value of the accrued liability and associated insurance asset was $85.6 million.
	The amounts recorded in the Consolidated Balance Sheets related to the estimated future settlement of existing claims are as follows:
		December 31,
	(millions of dollars)	2013		2012
	Assets:
	Other non-current assets	$	96.7	$	85.6
	Total insurance assets	$	96.7	$	85.6
	Liabilities:
	Accounts payable and accrued expenses	$	41.1	$	36.5
	Other non-current liabilities	55.6		49.1
	Total accrued liabilities	$	96.7	$	85.6
	The 2013 increase in the accrued liability and associated insurance asset is primarily due to an expected higher rate of claim settlement based on recent 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.

Leases_and_Commitments

Leases and Commitments	12 Months Ended
	Dec. 31, 2013
Leases [Abstract]	'
Leases and commitments	'
	LEASES AND COMMITMENTS
	Certain assets are leased under long-term operating leases, including rent for the corporate headquarters and one airplane. Most leases contain renewal options for various periods. Leases generally require the Company to pay for insurance, taxes and maintenance of the leased property. The Company leases other equipment such as vehicles and certain office equipment under short-term leases. Total rent expense was $32.1 million, $31.3 million and $30.7 million in the years ended December 31, 2013, 2012 and 2011, respectively. The Company does not have any material capital leases.
	Future minimum operating lease payments at December 31, 2013 were as follows:
	(millions of dollars)
	2014	$	14.5
	2015	12
	2016	9.9
	2017	8.8
	2018	6.6
	After 2018	3.4
	Total minimum lease payments	$	55.2

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2013
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.
	In April 2012, the Company settled its 3.50% convertible senior notes. Prior to the settlement, the potential common shares associated with these notes were reflected in diluted EPS using the “if-converted” method. Under this method, if dilutive, the common shares were assumed issued as of the beginning of the reporting period and included in calculating diluted EPS. In addition, if dilutive, interest expense, net of tax, related to the convertible senior notes was added back to the numerator in calculating diluted EPS.
	In conjunction with the convertible senior note offering, the Company entered into a bond hedge overlay, including both call options and warrants. On April 16, 2012, the Company settled the call option portion of the bond hedge overlay, receiving approximately 13.0 million shares, which reduced the weighted average basic and dilutive shares outstanding. Prior to the settlement, if the Company's weighted average share price exceeded $16.41 per share, the call options were anti-dilutive. During the third and fourth quarters of 2012, the Company settled the warrant portion of the bond hedge overlay, delivering approximately 9.8 million shares. Prior to settlement, if the Company's weighted-average share price exceeded $19.31 per share, the warrants were dilutive to the Company's earnings.
	The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share of common stock:
		Year Ended December 31,
	(in millions except per share amounts)	2013		2012		2011
	Basic earnings per share:
	Net earnings attributable to BorgWarner Inc.	$	624.3	$	500.9	$	550.1
	Weighted average shares of common stock outstanding	228.6		225.304		218.458
	Basic earnings per share of common stock	$	2.73	$	2.22	$	2.52
	Diluted earnings per share:
	Net earnings attributable to BorgWarner Inc.	$	624.3	$	500.9	$	550.1
	Adjusted for net interest expense on convertible notes	—		5.8		21.5
	Diluted net earnings attributable to BorgWarner Inc.	$	624.3	$	506.7	$	571.6
	Weighted average shares of common stock outstanding	228.6		225.304		218.458
	Effect of 3.50% convertible senior notes	—		6.644		22.778
	Effect of warrant	—		6.8		10.43
	Effect of stock-based compensation	2.737		4.006		5.27
	Total dilutive effect on weighted average shares of common stock outstanding	2.737		17.45		38.478
	Weighted average shares of common stock outstanding including dilutive shares	231.337		242.754		256.936
	Diluted earnings per share of common stock	$	2.7	$	2.09	$	2.22
	Total anti-dilutive shares:
	Call options	—		3.878		12.282

Recent_Transactions

Recent Transactions	12 Months Ended
	Dec. 31, 2013
Business Combinations [Abstract]	'
Recent transactions	'
	RECENT TRANSACTIONS
	Gustav Wahler GmbH u. Co KG
	In December 2013, the Company announced that it had signed an agreement to acquire Gustav Wahler GmbH u. Co. KG and its general partner ("Wahler"). The deal is expected to close in the first quarter of 2014 subject to standard regulatory approvals. 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. Wahler's sales for 2013 are expected to be approximately $350 million and this acquisition strengthens the Company's strategic position as a producer of complete EGR systems and creates additional market opportunities in both passenger and commercial vehicle applications.
	BorgWarner BERU Systems Korea Co., Ltd.
	During the third and fourth quarters of 2012, the Company completed the purchase of the remaining 49% of BorgWarner BERU Systems Korea Co., Ltd. for $15.0 million in cash, which has been classified as a financing activity within the Consolidated Statement of Cash Flows. In accordance with ASC Topic 810,"Consolidation," the Company reduced its noncontrolling interest balance by $7.0 million and reduced capital in excess of par value by $8.0 million. As a result of these transactions, the Company now owns 100% of BorgWarner BERU Systems Korea Co., Ltd.
	Spark plug business
	During the second and third quarters of 2012, the Company incurred $39.7 million in expense associated with the loss on sale of the spark plug business to Federal-Mogul Corporation primarily related to the write-down of prior purchase price accounting adjustments. These purchase price accounting adjustments were originally reported in the Engine segment and related to the BERU acquisition. As a result of the sale, the Company received $55.2 million in cash, which is classified as an investing activity within the Consolidated Statement of Cash Flows. The sale will allow the Company to continue to focus on expanding BERU Systems' core products of glow plugs, diesel cold start systems and other gasoline ignition technologies.
	Tire pressure monitoring business
	During the fourth quarter of 2011, the Company incurred $21.5 million in expense associated with the loss on sale of the tire pressure monitoring business, including the write-down of prior purchase price accounting adjustments related to the BERU acquisition, costs related to the divestiture, and a write-down of a portion of the ignitor and electronic business. The Company received $22.9 million in cash, classified as an investing activity within the Consolidated Statement of Cash Flows, from the sale of its tire pressure monitoring business to Huf Electronics GmbH. The sale will allow the Company to continue to focus on expanding BERU Systems' core products of glow plugs, diesel cold start systems and other gasoline ignition technologies.
	BorgWarner Vikas Emissions Systems India Private Limited
	On August 2, 2011, the Company purchased the noncontrolling interest's 40% share of BorgWarner Vikas Emissions Systems India Private Limited for $29.4 million in cash, which has been classified as a financing activity within the Consolidated Statement of Cash Flows. In accordance with ASC Topic 810, the Company reduced its noncontrolling interest balance by $2.8 million and reduced capital in excess of par value by $26.6 million. As a result of this transaction, the Company owns 100% of BorgWarner Vikas Emissions Systems India Private Limited.
	Traction Systems division of Haldex Group
	On January 31, 2011, the Company acquired 100% of the stock of Haldex Traction Holding AB ("Haldex Traction Systems"). Haldex Traction Systems has operations in Sweden, Hungary and Mexico. The consideration for the acquisition, net of cash acquired, was $214.9 million (1.38 billion Swedish Krona).
	The acquisition has accelerated the Company's growth in the global all-wheel drive ("AWD") market as it continues to shift toward front-wheel drive ("FWD") based vehicles.  The acquisition will add industry leading FWD/AWD technologies, with a strong European customer base, to the Company's existing portfolio of front- and rear-wheel drive based products.  This enables the Company to provide global customers a broader range of AWD solutions to meet their vehicle needs.
	The operating results are reported within the Company's Drivetrain reporting segment as of the date of acquisition. The Company paid $203.7 million, which is recorded as an investing activity in the Consolidated Statement of Cash Flows. Additionally, the Company assumed retirement-related liabilities of $5.3 million and assumed debt of $5.9 million, which are considered non-cash transactions in the Consolidated Statement of Cash Flows.

Reporting_Segments_and_Related

Reporting Segments and Related Information	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Reporting segments and related information	'
	REPORTING SEGMENTS AND RELATED INFORMATION
	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.
	2013 Segment information
		Net sales									Year-end assets			Depreciation/ amortization			Long-lived asset expenditures (b)
	(millions of dollars)	Customers			Inter-segment			Net
	Engine	$	4,990.10		$	32		$	5,022.10		$	3,519.10		$	189.1		$	277.5
	Drivetrain	2,446.50			—			2,446.50			1,786.60			90.5			122.9
	Inter-segment eliminations	—			(32.0		)	(32.0		)	—			—			—
	Total	7,436.60			—			7,436.60			5,305.70			279.6			400.4
	Corporate (a)	—			—			—			1,611.30			19.8			17.4
	Consolidated	$	7,436.60		$	—		$	7,436.60		$	6,917.00		$	299.4		$	417.8
	2012 Segment information
		Net sales									Year-end assets			Depreciation/ amortization			Long-lived asset expenditures (b)
	(millions of dollars)	Customers			Inter-segment			Net
	Engine	$	4,884.50		$	28.5		$	4,913.00		$	3,299.20		$	177.8		$	269.9
	Drivetrain	2,298.70			—			2,298.70			1,652.20			91.3			125.6
	Inter-segment eliminations	—			(28.5		)	(28.5		)	—			—			—
	Total	7,183.20			—			7,183.20			4,951.40			269.1			395.5
	Corporate (a)	—			—			—			1,449.40			19.5			11.9
	Consolidated	$	7,183.20		$	—		$	7,183.20		$	6,400.80		$	288.6		$	407.4
	2011 Segment information
		Net sales									Year-end assets			Depreciation/ amortization			Long-lived asset
	(millions of dollars)	Customers			Inter-segment			Net									expenditures (b)
	Engine	$	5,030.20		$	20.4		$	5,050.60		$	3,329.00		$	188.6		$	264.3
	Drivetrain	2,084.50			—			2,084.50			1,562.80			80			115.9
	Inter-segment eliminations	—			(20.4		)	(20.4		)	—			—			—
	Total	7,114.70			—			7,114.70			4,891.80			268.6			380.2
	Corporate (a)	—			—			—			1,066.80			14.4			13.5
	Consolidated	$	7,114.70		$	—		$	7,114.70		$	5,958.60		$	283		$	393.7
	_______________
	(a) Corporate assets include investments and advances and deferred income taxes.
	(b) Long-lived asset expenditures include capital expenditures and tooling outlays.
	Adjusted earnings before interest, income taxes and noncontrolling interest ("Adjusted EBIT")
		Year Ended December 31,
	(millions of dollars)	2013			2012			2011
	Engine	$	826		$	786.4		$	774.3
	Drivetrain	252.2			209.1			161.2
	Adjusted EBIT	1,078.20			995.5			935.5
	Restructuring expense	52.3			27.4			—
	Program termination agreement	11.3			—			—
	Retirement related obligations	5.9			17.3			—
	Loss from disposal activities	—			39.7			21.5
	Patent infringement settlement, net of legal costs incurred	—			—			(29.1		)
	Corporate, including equity in affiliates' earnings and stock-based compensation	110			115.4			107.4
	Interest income	(4.8		)	(4.7		)	(4.8		)
	Interest expense and finance charges	34.2			39.4			74.6
	Earnings before income taxes and noncontrolling interest	869.3			761			765.9
	Provision for income taxes	218.3			238.6			195.3
	Net earnings	651			522.4			570.6
	Net earnings attributable to the noncontrolling interest, net of tax	26.7			21.5			20.5
	Net earnings attributable to BorgWarner Inc.	$	624.3		$	500.9		$	550.1
	Geographic Information
	Outside the U.S., only China, Germany, Hungary and South Korea exceeded 5% of consolidated net sales during the year ended December 31, 2013, attributing sales to the location of production rather than the location of the customer. Also, the Company's 50% equity investment in NSK-Warner (see Note 5) of $168.0 million, $184.4 million and $189.2 million at December 31, 2013, 2012 and 2011, respectively, is excluded from the definition of long-lived assets, as are goodwill and certain other non-current assets.
		Net sales									Long-lived assets
	(millions of dollars)	2013			2012			2011			2013			2012			2011
	United States	$	1,939.70		$	1,857.20		$	1,674.00		$	531.7		$	508.1		$	492.6
	Europe:
	Germany	1,760.10			1,871.30			2,200.00			430			432.2			420.4
	Hungary	451.5			448.9			503.2			66.9			64.3			56.9
	France	327.6			335.2			363			44.4			45.9			63.2
	Other Europe	1,132.50			1,015.10			917.8			257.6			225.8			194.6
Total Europe	3,671.70			3,670.50			3,984.00			798.9			768.2			735.1
South Korea	563.5			505.6			471.7			165.2			140.4			124.5
China	636.3			499.1			416.6			238.5			184.3			148
Other foreign	625.4			650.8			568.4			205.1			187			164.1
Total	$	7,436.60		$	7,183.20		$	7,114.70		$	1,939.40		$	1,788.00		$	1,664.30
Sales to Major Customers
Consolidated net sales to Volkswagen (including its subsidiaries) were approximately 16%, 17% and 19% for the years ended December 31, 2013, 2012 and 2011, respectively; and to Ford (including its subsidiaries) were approximately 14%, 13%, and 12% for the years ended December 31, 2013, 2012 and 2011, respectively. Both of the Company's reporting segments had significant sales to Volkswagen and Ford in 2013, 2012 and 2011. Accounts receivable from these customers at December 31, 2013 comprised approximately 24% ($248.4 million) of total accounts receivable. Such sales consisted of a variety of products to a variety of customer locations and regions. No other single customer accounted for more than 10% of consolidated net sales in any of the years presented.
Sales by Product Line
Sales of turbochargers for light vehicles represented approximately 26% of total net sales for the years ended December 31, 2013, 2012 and 2011. The Company currently supplies light vehicle turbochargers to many OEMs including BMW, Daimler, Fiat, Ford, General Motors, Hyundai, PSA, Renault and Volkswagen. No other single product line accounted for more than 10% of consolidated net sales in any of the years presented.
Interim Financial Information (Unaudited)
(millions of dollars, except per share amounts)	2013															2012
Quarter ended	31-Mar			30-Jun			30-Sep			31-Dec			Year			31-Mar			30-Jun			30-Sep			31-Dec			Year
Net sales	$	1,851.10		$	1,893.90		$	1,806.20		$	1,885.40		$	7,436.60		$	1,912.50		$	1,856.40		$	1,695.20		$	1,719.10		$	7,183.20
Cost of sales	1,476.40			1,497.30			1,426.60			1,478.80			5,879.10			1,516.70			1,473.20			1,351.50			1,374.90			5,716.30
Gross profit	374.7			396.6			379.6			406.6			1,557.50			395.8			383.2			343.7			344.2			1,466.90
Selling, general and administrative expenses	159.3			155.6			157.7			167.1			639.7			169			153.1			151			156.2			629.3
Other expense (income)	16.9			(2.4		)	(3.7		)	51.8			62.6			1.1			36.6			29.7			17.3			84.7
Operating income	198.5			243.4			225.6			187.7			855.2			225.7			193.5			163			170.7			752.9
Equity in affiliates’ earnings, net of tax	(9.7		)	(11.1		)	(10.4		)	(12.3		)	(43.5		)	(9.2		)	(12.5		)	(11.1		)	(10.0		)	(42.8		)
Interest income	(1.0		)	(1.0		)	(1.3		)	(1.5		)	(4.8		)	(1.4		)	(1.3		)	(1.0		)	(1.0		)	(4.7		)
Interest expense and finance charges	9.7			8.8			8.1			7.6			34.2			15.1			12.6			5			6.7			39.4
Earnings before income taxes and noncontrolling interest	199.5			246.7			229.2			193.9			869.3			221.2			194.7			170.1			175			761
Provision for income taxes	50.9			66.6			56.3			44.5			218.3			57.5			68.5			64.2			48.4			238.6
Net earnings	148.6			180.1			172.9			149.4			651			163.7			126.2			105.9			126.6			522.4
Net earnings attributable to the noncontrolling interest, net of tax	6.6			6			6.1			8			26.7			5.7			5.6			4.8			5.4			21.5
Net earnings attributable to BorgWarner Inc. (a)	$	142		$	174.1		$	166.8		$	141.4		$	624.3		$	158		$	120.6		$	101.1		$	121.2		$	500.9
Earnings per share — basic	$	0.62		$	0.76		$	0.73		$	0.62		$	2.73		$	0.73		$	0.54		$	0.44		$	0.52		$	2.22
Earnings per share — diluted	$	0.61		$	0.75		$	0.72		$	0.62		$	2.7		$	0.64		$	0.5		$	0.43		$	0.51		$	2.09
_______________
(a) The Company's results were impacted by the following:
•	Quarter ended December 31, 2013: The Company incurred restructuring expense of $52.3 million, related to the initiation of Drivetrain segment actions designed to improve future profitability and competitiveness. The Company recorded tax benefits of $7.1 million in connection with the restructuring expense. Additionally, the Company recorded a net tax benefit of $4.4 million related to the reversal of certain state deferred tax asset valuation allowances and other tax adjustments.
•	Quarter ended September 30, 2013: The Company incurred a net tax benefit of $5.6 million, which was comprised of tax benefits of $3.1 million related to 2012 provision to return adjustments and $2.5 million related to the reversal of certain state deferred tax asset valuation allowances.
•	Quarter ended March 31, 2013: The Company incurred $11.3 million of expense related to a program termination agreement. Retirement related obligations expense of $5.9 million was primarily related to a first quarter 2013 grant of restricted stock awards to certain retiring NEOs as to which the Company waived the forfeiture provisions. The Company recorded tax benefits of $3.8 million and $2.1 million related to the program termination agreement and retirement related obligations. Additionally, the Company recorded a net tax benefit of $1.7 million, which was 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, partially offset by a $4.9 million tax expense related to a comprehensive income adjustment.
•	Quarter ended December 31, 2012: Retirement related obligations of $17.3 million are comprised of a $5.7 million loss resulting from the settlement of a portion of the Muncie Plant's pension obligation and an $11.6 million expense associated with the retirement of certain NEOs. These obligations were partially offset by a $6.1 million tax benefit. The Company incurred tax expense of $3.9 million which included $11.1 million of U.S. tax expense to correct the income taxes payable balance, partially offset by tax benefits resulting from changes to the statutory income tax rate in certain countries and the settlement of certain tax audits.
•	Quarter ended September 30, 2012: The Company incurred $1.8 million of expense and $11.2 million of tax expense associated with the completion of the sale of its spark plug business. The Company also recorded restructuring expense of $27.4 million primarily associated with the disposal and future requirements of BERU's on-going business, which was partially offset by a tax benefit of $7.7 million. Additionally, the Company incurred tax expense of $6.9 million primarily resulting from the settlement of certain tax audits.
•	Quarter ended June 30, 2012: The Company recorded expense of $37.9 million primarily due to the write-down of prior purchase price accounting adjustments included within the disposal group as a result of signing a Master Purchase Agreement to sell the spark plug business to Federal-Mogul Corporation, which was partially offset by a tax benefit of $5.5 million resulting from the write-down. Additionally, the Company recorded tax expense of $9.0 million related to its decision to change its cash repatriation assertion for some of its foreign subsidiaries.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Use of estimates	'
	Use of estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the accompanying notes, as well as, the amounts of revenues and expenses reported during the periods covered by these financial statements and accompanying notes. Actual results could differ from those estimates.
Concentrations of risk	'
	Concentrations of risk Cash is maintained with several financial institutions. Deposits held with banks may exceed the amount of insurance provided on such deposits. Generally, these deposits may be redeemed upon demand and are maintained with financial institutions of reputable credit and therefore bear minimal risk.
	The Company performs ongoing credit evaluations of its suppliers and customers and, with the exception of certain financing transactions, does not require collateral from its OEM customers. Some automotive parts suppliers continue to experience commodity cost pressures and the effects of industry overcapacity. These factors have increased pressure on the industry's supply base, as suppliers cope with higher commodity costs, lower production volumes and other challenges. The Company receives certain of its raw materials from sole suppliers or a limited number of suppliers. The inability of a supplier to fulfill supply requirements of the Company could materially affect future operating results.
Consolidations	'
	Principles of consolidation The Consolidated Financial Statements include all majority-owned subsidiaries with a controlling financial interest. All inter-company accounts and transactions have been eliminated in consolidation. Investments in 20% to 50% owned affiliates are accounted for under the equity method when the Company does not have a controlling financial interest.
Revenue recognition	'
	Revenue recognition The Company recognizes revenue when title and risk of loss pass to the customer, which is usually upon shipment of product. Although the Company may enter into long-term supply agreements with its major customers, each shipment of goods is treated as a separate sale and the prices are not fixed over the life of the agreements.
Cost of sales	'
	Cost of sales The Company includes materials, direct labor and manufacturing overhead within cost of sales. Manufacturing overhead is comprised of indirect materials, indirect labor, factory operating costs and other such costs associated with manufacturing products for sale.
Cash	'
	Cash Cash is valued at fair market value. It is the Company's policy to classify all highly liquid investments with original maturities of three months or less as cash.
Receivables, net	'
	Receivables, net The Company securitizes certain receivables through third party financial institutions without recourse and continues to administer the collection of these receivables on behalf of the third party. The amount can vary each month based on the amount of underlying receivables. On December 21, 2009, the Company entered into a $50 million accounts receivable securitization facility, which was amended on September 8, 2010 to increase the facility to $80 million and then again on November 1, 2012 to increase the facility to $110 million. The amended facility matures on October 31, 2014.
Inventories, net	'
	Inventories, net Inventories are valued at the lower of cost or market. Cost of U.S. inventories is determined using the last-in, first-out (“LIFO”) method, while the foreign operations use the first-in, first-out (“FIFO”) or average-cost methods.
Pre-production costs related to long-term supply arrangements	'
	Pre-production costs related to long-term supply arrangements Engineering, research and development and other design and development costs for products sold on long-term supply arrangements are expensed as incurred unless the Company has a contractual guarantee for reimbursement from the customer. Costs for molds, dies and other tools used to make products sold on long-term supply arrangements for which the Company either has title to the assets or has the non-cancelable right to use the assets during the term of the supply arrangement are capitalized in property, plant and equipment and amortized to cost of sales over the shorter of the term of the arrangement or over the estimated useful lives of the assets, typically three to five years. Costs for molds, dies and other tools used to make products sold on long-term supply arrangements for which the Company has a contractual guarantee for lump sum reimbursement from the customer are capitalized in prepayments and other current assets.
Property, plant and equipment and depreciation, net	'
	Property, plant and equipment, net Property, plant and equipment is valued at cost less accumulated depreciation. Expenditures for maintenance, repairs and renewals of relatively minor items are generally charged to expense as incurred. Renewals of significant items are capitalized. Depreciation is generally computed on a straight-line basis over the estimated useful lives of the assets. Useful lives for buildings range from 15 to 40 years and useful lives for machinery and equipment range from three to 12 years. For income tax purposes, accelerated methods of depreciation are generally used.
Impairment of long-lived assets	'
	Impairment of long-lived assets, including definite-lived intangible assets The Company reviews the carrying value of its long-lived assets, whether held for use or disposal, including other amortizing intangible assets, when events and circumstances warrant such a review under Accounting Standards Codification ("ASC") Topic 360. In assessing long-lived assets for an impairment loss, assets are grouped with other assets and liabilities at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities. In assessing long-lived assets for impairment, management generally considers individual facilities the lowest level for which identifiable cash flows are largely independent. A recoverability review is performed using the undiscounted cash flows if there is a triggering event. If the undiscounted cash flow test for recoverability identifies a possible impairment, management will perform a fair value analysis. Management determines fair value under ASC Topic 820 using the appropriate valuation technique of market, income or cost approach. If the carrying value of a long-lived asset is considered impaired, an impairment charge is recorded for the amount by which the carrying value of the long-lived asset exceeds its fair value.
	Management believes that the estimates of future cash flows and fair value assumptions are reasonable; however, changes in assumptions underlying these estimates could affect the valuations. Long-lived assets held for sale are recorded at the lower of their carrying amount or fair value less cost to sell. Significant judgments and estimates used by management when evaluating long-lived assets for impairment include: (i) an assessment as to whether an adverse event or circumstance has triggered the need for an impairment review; (ii) undiscounted future cash flows generated by the asset; and (iii) fair valuation of the asset.
Goodwill and other indefinite-lived intangible assets	'
	Goodwill and other indefinite-lived intangible assets During the fourth quarter of each year, the Company qualitatively assesses its goodwill and indefinite-lived intangible assets assigned to each of its reporting units. This qualitative assessment evaluates various events and circumstances, such as macro economic conditions, industry and market conditions, cost factors, relevant events and financial trends, that may impact a reporting unit's fair value. Using this qualitative assessment, the Company determines whether it is more-likely-than not the reporting unit's fair value exceeds its carrying value. If it is determined that it is not more-likely-than-not the reporting unit's fair value exceeds the carrying value, or upon a triggering event, including recent acquisition or divestiture activity, the Company performs a quantitative, "step one," goodwill impairment analysis.
Product warranties	'
	Product warranties 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 product warranty accrual is allocated to current and non-current liabilities in the Consolidated Balance Sheets.
Other loss accruals and valuation allowances	'
	Other loss accruals and valuation allowances The Company has numerous other loss exposures, such as customer claims, workers' compensation claims, litigation and recoverability of assets. Establishing loss accruals or valuation allowances for these matters requires the use of estimates and judgment in regard to the risk exposure and ultimate realization. The Company estimates losses under the programs using consistent and appropriate methods, however, changes to its assumptions could materially affect the recorded accrued liabilities for loss or asset valuation allowances.
Derivative financial instruments	'
	Derivative financial instruments The Company recognizes that certain normal business transactions generate risk. Examples of risks include exposure to exchange rate risk related to transactions denominated in currencies other than the functional currency, changes in commodity costs and interest rates. It is the objective and responsibility of the Company to assess the impact of these transaction risks and offer protection from selected risks through various methods, including financial derivatives. Virtually all derivative instruments held by the Company are designated as hedges, have high correlation with the underlying exposure and are highly effective in offsetting underlying price movements. Accordingly, gains and losses from changes in qualifying hedge fair values are matched with the underlying transactions. All hedge instruments are carried at their fair value based on quoted market prices for contracts with similar maturities. The Company does not engage in any derivative transactions for purposes other than hedging specific risks.
Foreign currency	'
	Foreign currency The financial statements of foreign subsidiaries are translated to U.S. dollars using the period-end exchange rate for assets and liabilities and an average exchange rate for each period for revenues, expenses and capital expenditures. The local currency is the functional currency for substantially all of the Company's foreign subsidiaries. Translation adjustments for foreign subsidiaries are recorded as a component of accumulated other comprehensive income (loss) in equity. The Company recognizes transaction gains and losses arising from fluctuations in currency exchange rates on transactions denominated in currencies other than the functional currency in earnings as incurred.
Environmental contingencies	'
	Environmental contingencies  The Company accounts for environmental costs in accordance with ASC Topic 450. Costs related to environmental assessments and remediation efforts at operating facilities are accrued when it is probable that a liability has been incurred and the amount of that liability can be reasonably estimated. Estimated costs are recorded at undiscounted amounts, based on experience and assessments and are regularly evaluated. The liabilities are recorded in accounts payable and accrued expenses and other non-current liabilities in the Company's Consolidated Balance Sheets.
Pension and other postretirement plans	'
	Pensions and other postretirement employee defined benefits  The Company's defined benefit pension and other postretirement employee benefit plans are accounted for in accordance with ASC Topic 715. Disability, early retirement and other postretirement employee benefits are accounted for in accordance with ASC Topic 712.
	Pensions and other postretirement employee benefit costs and related liabilities and assets are dependent upon assumptions used in calculating such amounts. These assumptions include discount rates, expected returns on plan assets, health care cost trends, compensation and other factors. In accordance with GAAP, actual results that differ from the assumptions used are accumulated and amortized over future periods, and accordingly, generally affect recognized expense in future periods.
Income taxes	'
	Income taxes  In accordance with ASC Topic 740, the Company's income tax expense is calculated based on expected income and statutory tax rates in the various jurisdictions in which the Company operates and requires the use of management's estimates and judgments.
New Accounting Pronouncements	'
	New Accounting Pronouncements
	In July 2013, the Financial Accounting Standards Board amended ASC Topic 740, "Income Taxes," requiring an unrecognized tax benefit, or a portion of an unrecognized tax benefit, to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. This guidance is effective prospectively for interim and annual periods beginning after December 15, 2013. The Company anticipates the adoption of this guidance will not have a material impact to its Consolidated Financial Statements.

Research_and_Development_Costs1

Research and Development Costs (Tables)	12 Months Ended
	Dec. 31, 2013
Research and Development [Abstract]	'
Schedule of Research and Development Costs	'
		Year Ended December 31,
	(millions of dollars)	2013			2012			2011
	Gross R&D expenditures	$	350.4		$	309.3		$	294.7
	Customer reimbursements	(47.2		)	(43.4		)	(51.0		)
	Net R&D expenditures	$	303.2		$	265.9		$	243.7

Other_Income_Expense_Tables

Other Income Expense (Tables)	12 Months Ended
	Dec. 31, 2013
Other Income and Expenses [Abstract]	'
Schedule of Other Nonoperating Income (Expense)	'
		Year Ended December 31,
	(millions of dollars)	2013			2012		2011
	Restructuring expense	$	52.3		$	27.4	$	—
	Program termination agreement	11.3			—		—
	Retirement related obligations	5.9			17.3		—
	Loss from disposal activities	—			39.7		21.5
	Patent infringement settlement, net of legal costs incurred	—			—		(29.1		)
	Other	(6.9		)	0.3		(0.5		)
	Other expense (income)	$	62.6		$	84.7	$	(8.1	)

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Components of income tax expense (benefit)	'
	Earnings before income taxes and the provision for income taxes are presented in the following table.
		Year Ended December 31,
	(millions of dollars)	2013				2012			2011
	Earnings before income taxes:
	U.S.	$	136.2			$	132.3		$	119.2
	Non-U.S.	733.1				628.7			646.7
	Total	$	869.3			$	761		$	765.9
	Provision for income taxes:
	Current:
	Federal	$	27.7			$	59.8		$	31.8
	State	2.6				3.4			1.7
	Foreign	211.1				186.1			162.9
	Total current	241.4				249.3			196.4
	Deferred:
	Federal	(2.3		)		19.6			17.3
	State	(7.3		)		(0.1		)	0.1
	Foreign	(13.5		)		(30.2		)	(18.5		)
	Total deferred	(23.1		)		(10.7		)	(1.1		)
	Total provision for income taxes	$	218.3			$	238.6		$	195.3
Effective Income Tax Rate Reconciliation	'
	An analysis of the differences between the effective tax rate and the U.S. statutory rate for the years ended December 31, 2013, 2012 and 2011 is presented below.
		Year Ended December 31,
	(millions of dollars)	2013				2012			2011
	Income taxes at U.S. statutory rate of 35%	$	304.3			$	266.4		$	268.1
	Increases (decreases) resulting from:
	State taxes, net of federal benefit	2.3				2.2			1.1
	U.S. tax on non-U.S. earnings	(2.8		)		22.3			9.4
	Affiliates' earnings	(15.6		)		(15.0		)	(13.4		)
	Foreign rate differential	(73.4		)		(57.9		)	(60.0		)
	Tax holidays	(15.6		)		(27.0		)	(21.3		)
	Withholding taxes	15.4				12.3			10.9
	Impairments and write-offs	5.2				15.9			6.4
	Tax credits	(6.9		)		(2.3		)	(4.0		)
	Reserve adjustments, settlements and claims	0.5				12.9			(1.0		)
	Valuation allowance adjustments	(1.4		)		9.7			(5.3		)
	Other	6.3				(0.9		)	4.4
	Provision for income taxes, as reported	$	218.3			$	238.6		$	195.3
Reconciliation of the total gross unrecognized tax benefits	'
	(millions of dollars)	2013				2012
	Balance, January 1	$	25.8			$	26.2
	Additions based on tax positions related to current year	1.7				2
	Additions for tax positions of prior years	12.5				13.4
	Reductions for closure of tax audits and settlements	(17.7		)		(14.6		)
	Reductions for lapse in statute of limitations	(0.2		)		(1.7		)
	Translation adjustment	0.8				0.5
	Balance, December 31	$	22.9			$	25.8
Tax jurisdiction	'
	The Company is no longer subject to income tax examinations by tax authorities in its major tax jurisdictions as follows:
	Tax jurisdiction		Years no longer subject to audit		Tax jurisdiction		Years no longer subject to audit
	U.S. Federal		2010 and prior		Hungary		2008 and prior
	China		2007 and prior		Japan		2011 and prior
	France		2007 and prior		South Korea		2007 and prior
	Germany		2007 and prior		Sweden		2007 and prior
Deferred Tax Assets (Liabilities)	'
	The gross components of deferred tax assets and liabilities as of December 31, 2013 and 2012 consist of the following:
		December 31,
	(millions of dollars)	2013				2012
	Deferred tax assets:
	Foreign tax credits	$	145.9			$	146
	Employee compensation	40.6				53.1
	Other comprehensive income	79.3				113.7
	Research and development capitalization	132.4				102.5
	Net operating loss and capital loss carryforwards	46.4				44.3
	Pension and other postretirement benefits	36.5				37.7
	Other	75.8				44.1
	Total deferred tax assets	$	556.9			$	541.4
	Valuation allowance	(34.2		)		(35.0		)
	Net deferred tax asset	$	522.7			$	506.4
	Deferred tax liabilities:
	Goodwill and intangible assets	(139.5		)		(130.9		)
	Fixed assets	(105.4		)		(101.9		)
	Other	(36.7		)		(25.6		)
	Total deferred tax liabilities	$	(281.6	)		$	(258.4	)
	Net deferred taxes	$	241.1			$	248

Balance_Sheet_Information_Tabl

Balance Sheet Information (Tables)	12 Months Ended
	Dec. 31, 2013
Balance Sheet Information (Tables) [Abstract]	'
Balance sheet information	'
		December 31,
	(millions of dollars)	2013			2012
	Receivables, net:
	Customers	$	1,067.50		$	1,014.60
	Other	183.1			134.8
	Gross receivables	1,250.60			1,149.40
	Bad debt allowance(a)	(2.1		)	(2.1		)
	Total receivables, net	$	1,248.50		$	1,147.30
	Inventories, net:
	Raw material and supplies	$	279.8		$	264
	Work in progress	78			82
	Finished goods	116.3			117.6
	FIFO inventories	474.1			463.6
	LIFO reserve	(16.0		)	(16.0		)
	Total inventories, net	$	458.1		$	447.6
	Prepayments and other current assets:
	Prepaid tooling	$	37.1		$	39.1
	Prepaid taxes	12.3			0.7
	Derivatives	3.4			5.7
	Other	30.9			22
	Total prepayments and other current assets	$	83.7		$	67.5
	Property, plant and equipment, net:
	Land and land use rights	$	87.2		$	76.4
	Buildings	666.7			640.8
	Machinery and equipment	1,897.50			2,282.40
	Capital leases	2.4			2.3
	Construction in progress	272.3			243.7
	Property, plant and equipment, gross	2,926.10			3,245.60
	Accumulated depreciation	(1,099.3		)	(1,567.0		)
	Property, plant & equipment, net, excluding tooling	1,826.80			1,678.60
	Tooling, net of amortization	112.6			109.4
	Property, plant & equipment, net	$	1,939.40		$	1,788.00
	Investments and advances:
	Investment in equity affiliates	$	201.5		$	217.7
	Other investments and advances	203.6			165
	Total investments and advances	$	405.1		$	382.7
	Other non-current assets:
	Deferred income taxes	$	257.6		$	244.1
	Other intangible assets	169.5			206.3
	Product liability insurance asset	96.7			85.6
	Other	53.2			39.9
	Total other non-current assets	$	577		$	575.9
		December 31,
	(millions of dollars)	2013			2012
	Accounts payable and accrued expenses:
	Trade payables	$	872.6		$	815.4
	Trade payables for capital expenditures	62.8			39.8
	Payroll and employee related	184.6			180.7
	Customer related	49.7			36.3
	Product liability	41.1			36.5
	Product warranties	38.4			33.1
	Retirement related	21.8			27.9
	Dividends payable to noncontrolling shareholders	16.7			9.5
	Interest	12			11.7
	Severance	11.3			8.9
	Insurance	8.2			9.2
	Legal and professional fees	7.8			4.2
	Derivatives	7.4			9.8
	Current deferred income taxes	3.9			1.4
	Environmental	1.1			1.6
	Other	44.4			61.2
	Total accounts payable and accrued expenses	$	1,383.80		$	1,287.20
	Other non-current liabilities:
Deferred income taxes	$	81.3		$	89.4
Product liability	55.6			49.1
Deferred revenue	46.2			30.5
Product warranties	34.3			31.8
Cross-currency swaps and derivatives	24.3			58.1
Environmental	2.9			2.3
Other	82.2			56.9
Total other non-current liabilities	$	326.8		$	318.1
(a) Bad debt allowance:	2013			2012			2011
Beginning balance, January 1	$	(2.1	)	$	(4.3	)	$	(4.0	)
Provision	(0.3		)	(0.8		)	(1.4		)
Write-offs	0.4			3			1
Translation adjustment and other	(0.1		)	—			0.1
Ending balance, December 31	$	(2.1	)	$	(2.1	)	$	(4.3	)
Summarized financial data for NSK-Warner	'
		November 30,
	(millions of dollars)	2013			2012
	Balance sheets:
	Cash and securities	$	118.3		$	123.3
	Current assets, including cash and securities	313.6			320
	Non-current assets	156.1			175.3
	Current liabilities	166.8			147.4
	Non-current liabilities	40.7			50.2
	Total equity	262.2			297.7
		Year Ended November 30,
	(millions of dollars)	2013			2012			2011
	Statements of operations:
	Net sales	$	604		$	696.7		$	655.2
	Gross profit	126.6			138.2			128.5
	Net earnings	68.3			68.5			61.6

Goodwill_and_Other_Intangibles1

Goodwill and Other Intangibles (Tables)	12 Months Ended
	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of goodwill [Text Block]	'
	The changes in the carrying amount of goodwill for the years ended December 31, 2013 and 2012 are as follows:
		2013						2012
	(millions of dollars)	Engine			Drivetrain			Engine			Drivetrain
	Gross goodwill balance, January 1	$	1,324.10		$	359.3		$	1,334.70		$	353.5
	Accumulated impairment losses, January 1	(501.8		)	(0.2		)	(501.8		)	(0.2		)
	Net goodwill balance, January 1	$	822.3		$	359.1		$	832.9		$	353.3
	Goodwill during the year:
	Divestitures*	(4.6		)	—			(16.9		)	—
	Translation adjustment and other	12.4			7.8			6.3			5.8
	Ending balance, December 31	$	830.1		$	366.9		$	822.3		$	359.1
Intangible assets disclosure [Text Block]	'
	The Company’s other intangible assets, primarily from acquisitions, consist of the following:
		December 31, 2013									December 31, 2012
	(millions of dollars)	Gross			Accumulated			Net			Gross			Accumulated		Net
		carrying			amortization			carrying			carrying			amortization		carrying
		amount						amount			amount					amount
	Amortized intangible assets:
	Patented and unpatented technology	$	85.9		$	36.5		$	49.4		$	80		$	26.2	$	53.8
	Customer relationships	201.8			111.4			90.4			216.3			100		116.3
	Miscellaneous	2.9			2.9			—			2.9			2.9		—
	Total amortized intangible assets	290.6			150.8			139.8			299.2			129.1		170.1
	In-process R&D	10.8			—			10.8			10.8			—		10.8
	Unamortized trade names	18.9			—			18.9			25.4			—		25.4
	Total other intangible assets	$	320.3		$	150.8		$	169.5		$	335.4		$	129.1	$	206.3
Intangible assets gross roll forward [Text Block]	'
	A roll forward of the gross carrying amounts of the Company's other intangible assets is presented below:
	(millions of dollars)	2013			2012
	Beginning balance, January 1	$	335.4		$	341.7
	Impairment*	(26.4		)	—
	Divestitures**	(1.1		)	(15.7		)
	Translation adjustment	12.4			9.4
	Ending balance, December 31	$	320.3		$	335.4
Accumulated amortization net [Text Block]	'
	A roll forward of the accumulated amortization associated with the Company's other intangible assets is presented below:
	(millions of dollars)	2013			2012
	Beginning balance, January 1	$	129.1		$	98.4
	Amortization	26.7			28.4
	Impairment*	(13.9		)	—
	Divestitures**	(0.4		)	(0.6		)
	Translation adjustment	9.3			2.9
	Ending balance, December 31	$	150.8		$	129.1

Product_Warranty_Tables

Product Warranty (Tables)	12 Months Ended
	Dec. 31, 2013
Product Warranties Disclosures [Abstract]	'
Product warranty liability [Text Block]	'
	The changes in the carrying amount of the Company’s total product warranty liability for the years ended December 31, 2013 and 2012 were as follows:
	(millions of dollars)	2013			2012
	Beginning balance, January 1	$	64.9		$	72.7
	Provisions	43.1			33.7
	Payments	(36.7		)	(42.8		)
	Translation adjustment	1.4			1.3
	Ending balance, December 31	$	72.7		$	64.9
	The product warranty liability is classified in the Consolidated Balance Sheets as follows:
		December 31,
	(millions of dollars)	2013			2012
	Accounts payable and accrued expenses	$	38.4		$	33.1
	Other non-current liabilities	34.3			31.8
	Total product warranty liability	$	72.7		$	64.9

Notes_Payable_and_LongTerm_Deb1

Notes Payable and Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Outstanding Notes Payable And Long Term Debt [Text Block]	'
		December 31,
	(millions of dollars)	2013		2012
	Short-term debt
	Short-term borrowings	$	84.8	$	129.1
	Receivables securitization	110		110
	Total short-term debt	$	194.8	$	239.1
	Long-term debt
	5.75% Senior notes due 11/01/16 ($150 million par value)	$	149.7	$	149.6
	8.00% Senior notes due 10/01/19 ($134 million par value)	133.9		133.9
	4.625% Senior notes due 09/15/20 ($250 million par value)	248.2		247.9
	7.125% Senior notes due 02/15/29 ($121 million par value)	119.4		119.4
	Multi-currency revolving credit facility	320		140
	Term loan facilities and other	40.4		17.1
	Unamortized portion of debt derivatives	16.2		20.2
	Total long-term debt	$	1,027.80	$	828.1
	Less: current portion	6.8		4.3
	Long-term debt, net of current portion	$	1,021.00	$	823.8
Annual principal payments [Text Block]	'
	(millions of dollars)
	2014	$	201.6
	2015	25.1
	2016	478.5
	2017	—
	2018	—
	After 2018	520.9
	Total payments	$	1,226.10
	Less: unamortized discounts	3.5
	Total	$	1,222.60
Total interest expense related to convertible notes in company's Consolidated Statement Of Operations [Text Block]	'
		Year Ended December 31,
	(millions of dollars)	2013		2012		2011
	Interest expense	$	—	$	9	33.1
	Non-cash portion	—		5.3		20

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Assets and liabilities measured at fair value [Text Block]	'
				Basis of fair value measurements
		Balance at December 31, 2013		Quoted prices in active markets for identical items		Significant other observable inputs		Significant unobservable inputs		Valuation technique
	(millions of dollars)			(Level 1)		(Level 2)		(Level 3)
	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
				Basis of fair value measurements
	(millions of dollars)	Balance at December 31, 2012		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	$	5.9	$	—	$	5.9	$	—	A
	Other non-current assets (insurance settlement agreement note receivable)	$	41	$	—	$	41	$	—	C
	Liabilities:
	Foreign currency contracts	$	9.8	$	—	$	9.8	$	—	A
	Net investment hedge contracts	$	58.1	$	—	$	58.1	$	—	A
Fair value defined benefit plan assets measured at recurring and non-recurring basis [Text Block]	'
	The following tables classify the Company's defined benefit plan assets measured at fair value on a recurring basis as of December 31, 2013 and 2012:
				Basis of fair value measurements
	(millions of dollars)	Balance at December 31, 2013		Quoted prices in active markets for identical items		Significant other observable inputs		Significant unobservable inputs		Valuation technique
				(Level 1)		(Level 2)		(Level 3)
	U.S. Plans:
	Fixed income securities	$	147.2	$	—	$	147.2	$	—	A
	Equity securities	100.9		50.5		50.4		—		A
	Real estate and other	26		—		26		—		A
		$	274.1	$	50.5	$	223.6	$	—
	Non-U.S. Plans:
	Fixed income securities	$	143.7	$	—	$	143.7	$	—	A
	Equity securities	188.2		70.5		117.7		—		A
	Real estate and other	13.1		—		13.1		—		A
		$	345	$	70.5	$	274.5	$	—
				Basis of fair value measurements
	(millions of dollars)	Balance at December 31, 2012		Quoted prices in active markets for identical items		Significant other observable inputs		Significant unobservable inputs		Valuation technique
				(Level 1)		(Level 2)		(Level 3)
	U.S. Plans:
	Fixed income securities	$	157.4	$	—	$	157.4	$	—	A
	Equity securities	100		48.9		51.1		—		A
	Real estate and other	25.3		—		25.3		—		A
		$	282.7	$	48.9	$	233.8	$	—
	Non-U.S. Plans:
	Fixed income securities	$	67.3	$	—	$	67.3	$	—	A
	Equity securities	99		—		99		—		A
	Real estate and other	11.6		—		11.6		—		A
		$	177.9	$	—	$	177.9	$	—

Financial_Instruments_Tables

Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2013
Derivative [Line Items]	'
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Text Block]	'
		Assets										Liabilities
	(millions of dollars)	Location		December 31, 2013				December 31, 2012				Location		December 31, 2013				December 31, 2012
	Foreign currency	Prepayments and other current assets		$	3.4			$	5.7			Accounts payable and accrued expenses		$	7.4			$	9.8
		Other non-current assets		$	—			$	0.2			Other non-current liabilities		$	—			$	—
	Net investment hedges	Other non-current assets		$	—			$	—			Other non-current liabilities		$	24.3			$	58.1
Deferred Losses Reported In Other Comprehensive Income Loss [Text Block]	'
			Deferred gain (loss) in AOCI at								Gain (loss) expected to be reclassified to income in one year or less
	(millions of dollars)		December 31, 2013				December 31, 2012
	Foreign currency		$	(3.7	)		$	(3.5	)		$	(3.7	)
	Net investment hedges		(22.1		)		(54.5		)		—
	Total		$	(25.8	)		$	(58.0	)		$	(3.7	)
Derivatives Designated As Cash Flow Hedging Instruments [Text Block]	'
					Gain (loss) reclassified from AOCI to income										Gain (loss) recognized in income
					(effective portion)										(ineffective portion)
					Year Ended December 31,										Year Ended December 31,
	(millions of dollars)		Location		2013				2012				Location		2013				2012
	Foreign currency		Sales		$	1.7			$	5.3			SG&A expense		$	0.2			$	—
	Foreign currency		Cost of goods sold		$	(13.9	)		$	3.5			SG&A expense		$	(1.5	)		$	0.1
	Foreign currency		SG&A expense		$	(0.4	)		$	—			SG&A expense		$	—			$	—
	Net investment hedges		N/A										Interest expense		$	1.3			$	2.3
Net investment hedge contracts [Member]	'
Derivative [Line Items]	'
Foreign Exchange Derivative Contracts Outstanding [Text Block]	'
		Cross-currency swaps
	(millions of dollars)	Notional				Notional				Duration
		in USD				in local currency
	Floating $ to Floating €	$	75			€	58.5			19-Oct
	Floating $ to Floating ¥	$	150			¥	17,581.50			16-Nov
Foreign currency contracts [Member]	'
Derivative [Line Items]	'
Foreign Exchange Derivative Contracts Outstanding [Text Block]	'
	Foreign currency derivatives (in millions)
	Functional currency		Traded currency		Notional in traded currency			Notional in traded currency			Duration
					31-Dec-13			31-Dec-12
	Brazilian real		US dollar		19.3			—			14-Dec
	British pound		Euro		—			28.8			13-Dec
	Chinese yuan		Japanese yen		215			—			14-Feb
	Chinese yuan		US dollar		12.3			—			14-Dec
	Euro		British pound		3			4.7			14-Dec
	Euro		Hungarian forint		6,430.50			9,300.00			14-Dec
	Euro		Japanese yen		5,830.70			6,760.00			14-Dec
	Euro		Korean won		663.1			—			14-Jul
	Euro		Polish zloty		96			87.4			14-Dec
	Euro		US dollar		29.4			15.2			14-Dec
	Hungarian forint		Euro		6.6			—			14-Dec
	Japanese yen		Chinese yuan		84			—			14-Dec
	Japanese yen		Korean Won		5,715.50			—			14-Dec
	Japanese yen		US dollar		4.2			9.5			14-Dec
	Korean won		Euro		23.6			32.4			14-Dec
	Korean won		Japanese yen		380.5			—			14-Aug
	Korean won		US dollar		—			17.5			13-Dec
	Mexican peso		US dollar		—			20.9			13-Dec
	Swedish krona		Euro		33.7			—			14-Dec
	US dollar		Indian rupee		—			111.1			13-Oct
	US dollar		Japanese yen		3,209.30			3,000.00			14-Sep

Retirement_Benefit_Plans_Table

Retirement Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]	'
Expense for defined contribution and defined benefit pension plans and other post employment defined benefit plans [Text Block]	'
		Year Ended December 31,
	(millions of dollars)	2013				2012			2011
	Defined contribution expense	$	24.9			$	24.8		$	18.9
	Defined benefit pension expense	24.3				27.3			17.5
	Other postretirement employee benefit expense	5.7				11.1			13.5
	Total	$	54.9			$	63.2		$	49.9
Reconciliation of the plans' benefit obligations, plan assets, funded status and recognition [Text Block]	'
		Pension benefits													Other postretirement
		Year Ended December 31,													employee benefits
		2013							2012						Year Ended December 31,
	(millions of dollars)	US				Non-US			US			Non-US			2013			2012
	Change in projected benefit obligation:
	Projected benefit obligation, January 1	$	330.1			$	447.6		$	337.4		$	344.3		$	220.5		$	251
	Service cost	—				12.4			—			9.1			0.4			0.5
	Interest cost	11.6				16.6			14.3			17.2			6.8			10.1
	Plan participants’ contributions	—				0.4			—			0.5			—			—
	Plan amendments	—				0.6			—			—			—			(0.3		)
	Actuarial (gain) loss	(18.7		)		11.8			15.5			84.1			(29.7		)	(20.7		)
	Currency translation	—				10.6			—			11.3			—			—
	Other	—				(2.7		)	—			(4.5		)	—			—
	Benefits paid	(29.4		)		(14.6		)	(37.1		)	(14.4		)	(20.5		)	(20.1		)
	Projected benefit obligation, December 31	$	293.6			$	482.7		$	330.1		$	447.6		$	177.5		$	220.5
	Change in plan assets:
	Fair value of plan assets, January 1	$	282.7			$	177.9		$	290.4		$	154.9
	Actual return on plan assets	20.8				23.6			29.4			15
	Employer contribution	—				150.4			—			18
	Plan participants’ contribution	—				0.4			—			0.5
	Currency translation	—				7.7			—			6
	Other	—				(0.4		)	—			(2.1		)
	Benefits paid	(29.4		)		(14.6		)	(37.1		)	(14.4		)
	Fair value of plan assets, December 31	$	274.1			$	345		$	282.7		$	177.9
	Funded status	$	(19.5	)		$	(137.7	)	$	(47.4	)	$	(269.7	)	$	(177.5	)	$	(220.5	)
	Amounts in the Consolidated Balance Sheets consist of:
	Current liabilities	$	(0.1	)		$	(2.6	)	$	(0.1	)	$	(7.0	)	$	(19.1	)	$	(20.8	)
	Non-current liabilities	(19.4		)		(135.1		)	(47.3		)	(262.7		)	(158.4		)	(199.7		)
	Net amount	$	(19.5	)		$	(137.7	)	$	(47.4	)	$	(269.7	)	$	(177.5	)	$	(220.5	)
	Amounts in accumulated other comprehensive loss consist of:
	Net actuarial loss	$	115			$	130.6		$	163.8		$	135.1		$	44		$	78.7
	Net prior service cost (credit)	9.7				1.1			(10.5		)	0.5			(36.1		)	(42.6		)
	Net amount*	$	124.7			$	131.7		$	153.3		$	135.6		$	7.9		$	36.1
	Total accumulated benefit obligation for all plans	$	293.6			$	464.8		$	330.1		$	430.2
	________________
	*	AOCI shown above does not include our equity investee, NSK-Warner. NSK-Warner had an AOCI loss of $4.9 million and $7.9 million at December 31, 2013 and 2012, respectively.
Funded status of pension plans with accumulated benefit obligations in excess of plan assets [Text Block]	'
		December 31,
	(millions of dollars)	2013				2012
	Accumulated benefit obligation	$	(752.0	)		$	(757.7	)
	Plan assets	612.7				458
	Deficiency	$	(139.3	)		$	(299.7	)
	Pension deficiency by country:
	United States	$	(19.5	)		$	(47.4	)
	United Kingdom	(15.3		)		(22.4		)
	Germany	(68.6		)		(192.4		)
	Other	(35.9		)		(37.5		)
	Total pension deficiency	$	(139.3	)		$	(299.7	)
Weighted average asset allocations of funded pensions plans and target allocations [Text Block]	'
		December 31,						Target Allocation
		2013			2012
	U.S. Plans:
	Real estate and other	9	%		9	%		5%-15%
	Fixed income securities	54	%		56	%		45%-65%
	Equity securities	37	%		35	%		25%-45%
		100	%		100	%
	Non-U.S. Plans:
	Real estate and other	4	%		6	%		0% - 7%
	Fixed income securities	42	%		38	%		37% - 47%
	Equity securities	54	%		56	%		51% - 61%
		100	%		100	%
Components of net periodic benefit cost [Text Block]	'
	See the table below for a breakout of net periodic benefit cost between U.S. and non-U.S. pension plans:
		Pension benefits																			Other postretirement employee benefits
		Year Ended December 31,
		2013							2012						2011						Year Ended December 31,
	(millions of dollars)	US				Non-US			US			Non-US			US			Non-US			2013			2012			2011
	Service cost	$	—			$	12.4		$	—		$	9.1		$	—		$	9.1		$	0.4		$	0.5		$	0.7
	Interest cost	11.6				16.6			14.3			17.2			16.1			17.8			6.8			10.1			11.8
	Expected return on plan assets	(18.2		)		(11.0		)	(18.8		)	(9.3		)	(20.8		)	(11.2		)	—			—			—
	Settlements, curtailments and other	—				0.2			5.7			0.5			—			(0.1		)	—			—			—
	Amortization of unrecognized prior service benefit	(0.8		)		—			(0.7		)	—			(0.7		)	—			(6.4		)	(6.4		)	(6.9		)
	Amortization of unrecognized loss	8.2				5.3			8.1			1.2			6.5			0.8			4.9			6.9			7.9
	Net periodic benefit cost	$	0.8			$	23.5		$	8.6		$	18.7		$	1.1		$	16.4		$	5.7		$	11.1		$	13.5
Defined benefit plan weighted average assumptions used in calculating benefit obligations [Text Block]	'
		December 31,
	(percent)	2013		2012
	U.S. pension plans:
	Discount rate	4.41		3.67
	Rate of compensation increase	N/A		N/A
	U.S. other postretirement employee benefit plans:
	Discount rate	4		3.25
	Rate of compensation increase	N/A		N/A
	Non-U.S. pension plans:
	Discount rate	3.9		3.86
	Rate of compensation increase	2.77		2.72
	The Company’s weighted-average assumptions used to determine the net periodic benefit cost for its defined benefit pension and other postretirement employee benefit plans for the years ended December 31, 2013, 2012 and 2011 were as follows:
		Year Ended December 31,
	(percent)	2013		2012		2011
	U.S. pension plans:
	Discount rate	3.67		4.42		5.17
	Rate of compensation increase	N/A		N/A		N/A
	Expected return on plan assets	6.75		6.75		7.5
	U.S. other postretirement plans:
	Discount rate	3.25		4.25		4.75
	Rate of compensation increase	N/A		N/A		N/A
	Expected return on plan assets	N/A		N/A		N/A
	Non-U.S. pension plans:
	Discount rate	3.86		5.13		5.37
	Rate of compensation increase	2.72		2.78		2.8
	Expected return on plan assets	6.42		6.49		7.07
Defined benefit plan estimated future benefit payments [Text Block]	'
	The estimated future benefit payments for the pension and other postretirement employee benefits are as follows:
			Pension benefits							Other postretirement employee benefits
	(millions of dollars)									w/o Medicare Part D reimbursements			with Medicare Part D reimbursements
	Year		U.S.				Non-U.S.
	2014		$	24			$	17.4		$	19.5		$	19.5
	2015		23.1				20.7			18.7			18.7
	2016		23				19.3			17.7			17.7
	2017		22.2				20.6			17.1			17.1
	2018		22.4				21.8			16.6			16.6
	2019-2023		103.2				118.4			65.6			65.6
Defined benefit plan effect of one percentage point change in assumed health care cost trend rates [Text Block]	'
	A one-percentage point change in the assumed health care cost trend would have the following effects:
		One Percentage Point
	(millions of dollars)	Increase				Decrease
	Effect on other postretirement employee benefit obligation	$	12.6			$	(10.9	)
	Effect on total service and interest cost components	$	0.5			$	(0.5	)

Stock_Incentive_Plans_Tables

Stock Incentive Plans (Tables)	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock option activity [Text Block]	'
	A summary of the plans’ shares under option at December 31, 2013, 2012 and 2011 is as follows:
		Shares (thousands)		Weighted average exercise price			Weighted average remaining contractual life		Aggregate intrinsic value
							(in years)		(in millions)
	Outstanding at January 1, 2011	6,506		$	14.32		4.9		$	142.2
	Exercised	(2,066	)	$	13.58				$	48.4
	Outstanding at December 31, 2011	4,440		$	14.68		4.1		$	76.3
	Exercised	(1,568	)	$	13.43				$	40.1
	Outstanding at December 31, 2012	2,872		$	15.33		3.4		$	58.8
	Exercised	(870	)	$	14.17				$	25.5
	Forfeited	(5	)	$	17.48
	Outstanding at December 31, 2013	1,997		$	15.82		2.6		$	80
	Options exercisable at December 31, 2013	1,997		$	15.82		2.6		$	80
Proceeds from stock option exercises [Text Block]	'
	Proceeds from stock option exercises for the years ended December 31, 2013, 2012 and 2011 were as follows:
		Year Ended December 31,
	(millions of dollars)	2013			2012			2011
	Proceeds from stock options exercised — gross	$	12.3		$	20.9		$	28.6
	Tax benefit	20.7			31.1			24.4
	Proceeds from stock options exercised, net of tax	$	33		$	52		$	53
Restricted stock compensation expense [Text Block]	'
		Year Ended December 31,
	(millions of dollars, except per share data)	2013			2012			2011
	Restricted stock compensation expense	$	25.8		$	21.2		$	15.1
	Restricted stock compensation expense, net of tax	$	18.8		$	15.5		$	11.4
Status of nonvested restricted stock [Text Block]	'
	A summary of the status of the Company’s nonvested restricted stock for employees and non-employee directors at December 31, 2013, 2012 and 2011 is as follows:
		Shares subject to restriction		Weighted average price
		(thousands)
	Nonvested at January 1, 2011	3,742		$	15.28
	Granted	548		$	35.29
	Vested	(1,218	)	$	13.7
	Forfeited	(212	)	$	19.03
	Nonvested at December 31, 2011	2,860		$	19.51
	Granted	676		$	39.21
	Vested	(1,350	)	$	13.72
	Forfeited	(122	)	$	27.18
	Nonvested at December 31, 2012	2,064		$	29.39
	Granted	782		$	37.82
	Vested	(1,322	)	$	24.36
	Forfeited	(113	)	$	36.59
	Nonvested at December 31, 2013	1,411		$	37.86
Amounts expensed under plan and share issuances [Text Block]	'
	The amounts expensed under the plan and the share issuances for the three-year measurement periods ended December 31, 2013, 2012 and 2011 were as follows:
		Year Ended December 31,
	(millions of dollars, except share data)	2013			2012			2011
	Expense	$	10.8		$	35.5		$	26.3
	Number of shares*	545,375			1,116,000			1,076,360
	________________
	*Shares are issued in February of the following year.

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	'
	The following table summarizes the activity within accumulated other comprehensive income (loss) during the years ended December 31, 2013, 2012 and 2011:
	(millions of dollars)	Foreign currency translation adjustments			Hedge instruments			Defined benefit postretirement plans			Other			Total
	Beginning Balance, January 1, 2011	$	148		$	(44.8	)	$	(158.1	)	$	1.2		$	(53.7	)
	Comprehensive (loss) income before reclassifications	(62.2		)	(9.2		)	(47.3		)	(0.1		)	(118.8		)
	Income taxes associated with comprehensive (loss) income before reclassifications	—			3			13.3			—			16.3
	Reclassification from accumulated other comprehensive (loss) income	—			1.5			7.6			—			9.1
	Income taxes reclassified into net earnings	—			(1.0		)	(2.7		)	—			(3.7		)
	Ending Balance December 31, 2011	$	85.8		$	(50.5	)	$	(187.2	)	$	1.1		$	(150.8	)
	Comprehensive (loss) income before reclassifications	38.2			30.3			(60.8		)	(0.2		)	7.5
	Income taxes associated with comprehensive (loss) income before reclassifications	—			(10.4		)	16.2			—			5.8
	Reclassification from accumulated other comprehensive (loss) income	16.8			(8.8		)	9.1			—			17.1
	Income taxes reclassified into net earnings	—			2.2			(3.1		)	—			(0.9		)
	Ending Balance December 31, 2012	$	140.8		$	(37.2	)	$	(225.8	)	$	0.9		$	(121.3	)
	Comprehensive (loss) income before reclassifications	40.3			19.6			52.5			1.5			113.9
	Income taxes associated with comprehensive (loss) income before reclassifications	—			(8.1		)	(15.8		)	—			(23.9		)
	Reclassification from accumulated other comprehensive (loss) income	—			12.6			11.2			—			23.8
	Income taxes reclassified into net earnings	—			(2.9		)	(3.6		)	—			(6.5		)
	Ending Balance December 31, 2013	$	181.1		$	(16.0	)	$	(181.5	)	$	2.4		$	(14.0	)

Contingencies_Tables

Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Estimated Future Settlement Of Existing Claims	'
	The amounts recorded in the Consolidated Balance Sheets related to the estimated future settlement of existing claims are as follows:
		December 31,
	(millions of dollars)	2013		2012
	Assets:
	Other non-current assets	$	96.7	$	85.6
	Total insurance assets	$	96.7	$	85.6
	Liabilities:
	Accounts payable and accrued expenses	$	41.1	$	36.5
	Other non-current liabilities	55.6		49.1
	Total accrued liabilities	$	96.7	$	85.6
	The 2013 increase in the accrued liability and associated insurance asset is primarily due to an expected higher rate of claim settlement based on recent claim activity.

Leases_and_Commitments_Tables

Leases and Commitments (Tables)	12 Months Ended
	Dec. 31, 2013
Leases [Abstract]	'
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	'
	Future minimum operating lease payments at December 31, 2013 were as follows:
	(millions of dollars)
	2014	$	14.5
	2015	12
	2016	9.9
	2017	8.8
	2018	6.6
	After 2018	3.4
	Total minimum lease payments	$	55.2

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Schedule of Earnings per Share reconciliation [Text Block]	'
	The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share of common stock:
		Year Ended December 31,
	(in millions except per share amounts)	2013		2012		2011
	Basic earnings per share:
	Net earnings attributable to BorgWarner Inc.	$	624.3	$	500.9	$	550.1
	Weighted average shares of common stock outstanding	228.6		225.304		218.458
	Basic earnings per share of common stock	$	2.73	$	2.22	$	2.52
	Diluted earnings per share:
	Net earnings attributable to BorgWarner Inc.	$	624.3	$	500.9	$	550.1
	Adjusted for net interest expense on convertible notes	—		5.8		21.5
	Diluted net earnings attributable to BorgWarner Inc.	$	624.3	$	506.7	$	571.6
	Weighted average shares of common stock outstanding	228.6		225.304		218.458
	Effect of 3.50% convertible senior notes	—		6.644		22.778
	Effect of warrant	—		6.8		10.43
	Effect of stock-based compensation	2.737		4.006		5.27
	Total dilutive effect on weighted average shares of common stock outstanding	2.737		17.45		38.478
	Weighted average shares of common stock outstanding including dilutive shares	231.337		242.754		256.936
	Diluted earnings per share of common stock	$	2.7	$	2.09	$	2.22
	Total anti-dilutive shares:
	Call options	—		3.878		12.282

Reporting_Segments_and_Related1

Reporting Segments and Related Information (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Schedule of Segment Reporting Information, by Segment [Table Text Block]	'
	2013 Segment information
		Net sales									Year-end assets			Depreciation/ amortization			Long-lived asset expenditures (b)
	(millions of dollars)	Customers			Inter-segment			Net
	Engine	$	4,990.10		$	32		$	5,022.10		$	3,519.10		$	189.1		$	277.5
	Drivetrain	2,446.50			—			2,446.50			1,786.60			90.5			122.9
	Inter-segment eliminations	—			(32.0		)	(32.0		)	—			—			—
	Total	7,436.60			—			7,436.60			5,305.70			279.6			400.4
	Corporate (a)	—			—			—			1,611.30			19.8			17.4
	Consolidated	$	7,436.60		$	—		$	7,436.60		$	6,917.00		$	299.4		$	417.8
	2012 Segment information
		Net sales									Year-end assets			Depreciation/ amortization			Long-lived asset expenditures (b)
	(millions of dollars)	Customers			Inter-segment			Net
	Engine	$	4,884.50		$	28.5		$	4,913.00		$	3,299.20		$	177.8		$	269.9
	Drivetrain	2,298.70			—			2,298.70			1,652.20			91.3			125.6
	Inter-segment eliminations	—			(28.5		)	(28.5		)	—			—			—
	Total	7,183.20			—			7,183.20			4,951.40			269.1			395.5
	Corporate (a)	—			—			—			1,449.40			19.5			11.9
	Consolidated	$	7,183.20		$	—		$	7,183.20		$	6,400.80		$	288.6		$	407.4
	2011 Segment information
		Net sales									Year-end assets			Depreciation/ amortization			Long-lived asset
	(millions of dollars)	Customers			Inter-segment			Net									expenditures (b)
	Engine	$	5,030.20		$	20.4		$	5,050.60		$	3,329.00		$	188.6		$	264.3
	Drivetrain	2,084.50			—			2,084.50			1,562.80			80			115.9
	Inter-segment eliminations	—			(20.4		)	(20.4		)	—			—			—
	Total	7,114.70			—			7,114.70			4,891.80			268.6			380.2
	Corporate (a)	—			—			—			1,066.80			14.4			13.5
	Consolidated	$	7,114.70		$	—		$	7,114.70		$	5,958.60		$	283		$	393.7
	_______________
	(a) Corporate assets include investments and advances and deferred income taxes.
	(b) Long-lived asset expenditures include capital expenditures and tooling outlays.
	Adjusted earnings before interest, income taxes and noncontrolling interest ("Adjusted EBIT")
		Year Ended December 31,
	(millions of dollars)	2013			2012			2011
	Engine	$	826		$	786.4		$	774.3
	Drivetrain	252.2			209.1			161.2
	Adjusted EBIT	1,078.20			995.5			935.5
	Restructuring expense	52.3			27.4			—
	Program termination agreement	11.3			—			—
	Retirement related obligations	5.9			17.3			—
	Loss from disposal activities	—			39.7			21.5
	Patent infringement settlement, net of legal costs incurred	—			—			(29.1		)
	Corporate, including equity in affiliates' earnings and stock-based compensation	110			115.4			107.4
	Interest income	(4.8		)	(4.7		)	(4.8		)
	Interest expense and finance charges	34.2			39.4			74.6
	Earnings before income taxes and noncontrolling interest	869.3			761			765.9
	Provision for income taxes	218.3			238.6			195.3
	Net earnings	651			522.4			570.6
	Net earnings attributable to the noncontrolling interest, net of tax	26.7			21.5			20.5
	Net earnings attributable to BorgWarner Inc.	$	624.3		$	500.9		$	550.1
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]	'
		Net sales									Long-lived assets
	(millions of dollars)	2013			2012			2011			2013			2012			2011
	United States	$	1,939.70		$	1,857.20		$	1,674.00		$	531.7		$	508.1		$	492.6
	Europe:
	Germany	1,760.10			1,871.30			2,200.00			430			432.2			420.4
	Hungary	451.5			448.9			503.2			66.9			64.3			56.9
	France	327.6			335.2			363			44.4			45.9			63.2
	Other Europe	1,132.50			1,015.10			917.8			257.6			225.8			194.6
	Total Europe	3,671.70			3,670.50			3,984.00			798.9			768.2			735.1
	South Korea	563.5			505.6			471.7			165.2			140.4			124.5
	China	636.3			499.1			416.6			238.5			184.3			148
	Other foreign	625.4			650.8			568.4			205.1			187			164.1
	Total	$	7,436.60		$	7,183.20		$	7,114.70		$	1,939.40		$	1,788.00		$	1,664.30
Schedule of Quarterly Financial Information [Table Text Block]	'
	(millions of dollars, except per share amounts)	2013															2012
	Quarter ended	31-Mar			30-Jun			30-Sep			31-Dec			Year			31-Mar			30-Jun			30-Sep			31-Dec			Year
	Net sales	$	1,851.10		$	1,893.90		$	1,806.20		$	1,885.40		$	7,436.60		$	1,912.50		$	1,856.40		$	1,695.20		$	1,719.10		$	7,183.20
	Cost of sales	1,476.40			1,497.30			1,426.60			1,478.80			5,879.10			1,516.70			1,473.20			1,351.50			1,374.90			5,716.30
	Gross profit	374.7			396.6			379.6			406.6			1,557.50			395.8			383.2			343.7			344.2			1,466.90
	Selling, general and administrative expenses	159.3			155.6			157.7			167.1			639.7			169			153.1			151			156.2			629.3
	Other expense (income)	16.9			(2.4		)	(3.7		)	51.8			62.6			1.1			36.6			29.7			17.3			84.7
	Operating income	198.5			243.4			225.6			187.7			855.2			225.7			193.5			163			170.7			752.9
	Equity in affiliates’ earnings, net of tax	(9.7		)	(11.1		)	(10.4		)	(12.3		)	(43.5		)	(9.2		)	(12.5		)	(11.1		)	(10.0		)	(42.8		)
	Interest income	(1.0		)	(1.0		)	(1.3		)	(1.5		)	(4.8		)	(1.4		)	(1.3		)	(1.0		)	(1.0		)	(4.7		)
	Interest expense and finance charges	9.7			8.8			8.1			7.6			34.2			15.1			12.6			5			6.7			39.4
	Earnings before income taxes and noncontrolling interest	199.5			246.7			229.2			193.9			869.3			221.2			194.7			170.1			175			761
	Provision for income taxes	50.9			66.6			56.3			44.5			218.3			57.5			68.5			64.2			48.4			238.6
	Net earnings	148.6			180.1			172.9			149.4			651			163.7			126.2			105.9			126.6			522.4
	Net earnings attributable to the noncontrolling interest, net of tax	6.6			6			6.1			8			26.7			5.7			5.6			4.8			5.4			21.5
	Net earnings attributable to BorgWarner Inc. (a)	$	142		$	174.1		$	166.8		$	141.4		$	624.3		$	158		$	120.6		$	101.1		$	121.2		$	500.9
	Earnings per share — basic	$	0.62		$	0.76		$	0.73		$	0.62		$	2.73		$	0.73		$	0.54		$	0.44		$	0.52		$	2.22
	Earnings per share — diluted	$	0.61		$	0.75		$	0.72		$	0.62		$	2.7		$	0.64		$	0.5		$	0.43		$	0.51		$	2.09
	_______________
	(a) The Company's results were impacted by the following:
	•	Quarter ended December 31, 2013: The Company incurred restructuring expense of $52.3 million, related to the initiation of Drivetrain segment actions designed to improve future profitability and competitiveness. The Company recorded tax benefits of $7.1 million in connection with the restructuring expense. Additionally, the Company recorded a net tax benefit of $4.4 million related to the reversal of certain state deferred tax asset valuation allowances and other tax adjustments.
	•	Quarter ended September 30, 2013: The Company incurred a net tax benefit of $5.6 million, which was comprised of tax benefits of $3.1 million related to 2012 provision to return adjustments and $2.5 million related to the reversal of certain state deferred tax asset valuation allowances.
	•	Quarter ended March 31, 2013: The Company incurred $11.3 million of expense related to a program termination agreement. Retirement related obligations expense of $5.9 million was primarily related to a first quarter 2013 grant of restricted stock awards to certain retiring NEOs as to which the Company waived the forfeiture provisions. The Company recorded tax benefits of $3.8 million and $2.1 million related to the program termination agreement and retirement related obligations. Additionally, the Company recorded a net tax benefit of $1.7 million, which was 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, partially offset by a $4.9 million tax expense related to a comprehensive income adjustment.
	•	Quarter ended December 31, 2012: Retirement related obligations of $17.3 million are comprised of a $5.7 million loss resulting from the settlement of a portion of the Muncie Plant's pension obligation and an $11.6 million expense associated with the retirement of certain NEOs. These obligations were partially offset by a $6.1 million tax benefit. The Company incurred tax expense of $3.9 million which included $11.1 million of U.S. tax expense to correct the income taxes payable balance, partially offset by tax benefits resulting from changes to the statutory income tax rate in certain countries and the settlement of certain tax audits.
	•	Quarter ended September 30, 2012: The Company incurred $1.8 million of expense and $11.2 million of tax expense associated with the completion of the sale of its spark plug business. The Company also recorded restructuring expense of $27.4 million primarily associated with the disposal and future requirements of BERU's on-going business, which was partially offset by a tax benefit of $7.7 million. Additionally, the Company incurred tax expense of $6.9 million primarily resulting from the settlement of certain tax audits.
	•	Quarter ended June 30, 2012: The Company recorded expense of $37.9 million primarily due to the write-down of prior purchase price accounting adjustments included within the disposal group as a result of signing a Master Purchase Agreement to sell the spark plug business to Federal-Mogul Corporation, which was partially offset by a tax benefit of $5.5 million resulting from the write-down. Additionally, the Company recorded tax expense of $9.0 million related to its decision to change its cash repatriation assertion for some of its foreign subsidiaries.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Details) (USD $)

12 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Nov. 01, 2012

Sep. 08, 2010

Dec. 21, 2009

United States

United States

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Receivables Securitization [Member]

Receivables Securitization [Member]

Receivables Securitization [Member]

Receivables Securitization [Member]

Receivables Securitization [Member]

Long-term Supply Arrangements [Member]

Building [Member]

Machinery and equipments

Long-term Supply Arrangements [Member]

Building [Member]

Machinery and equipments

Percentage owned affiliates accounted for under equity method, minimum

20.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage owned affiliates accounted for under equity method, maximum

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Inventory Disclosure [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Inventories, net

$458.10

$447.60

$109.30

$102.10

'

'

'

'

'

'

'

'

'

'

'

'

'

Inventory, LIFO Reserve

16

16

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total short-term debt

'

'

'

'

'

'

'

'

'

'

'

'

$110

$110

$110

$80

$50

Property, Plant and Equipment [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property, Plant and Equipment, Useful Life, Minimum

'

'

'

'

'

'3 years

'15 years

'3 years

'

'5 years

'40 years

'12 years

'

'

'

'

'

Standard Product Warranty Disclosure [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Standard Product Warranty Description

'

'

'

'

'P1Y

'

'

'

'P3Y

'

'

'

'

'

'

'

'

Research_and_Development_Costs2

Research and Development Costs (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Research and Development [Abstract]	'	'	'
Gross R&D expenditures	$350.40	$309.30	$294.70
Customer reimbursements	-47.2	-43.4	-51
Net R&D expenditures	$303.20	$265.90	$243.70
Net R&D expenditures as a percentage of net sales	4.10%	3.70%	3.40%
Research and Development Contract, Percent of Net Research and Development, Maximum	5.00%	5.00%	5.00%

Other_Income_Expense_Details

Other Income Expense (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Income and Expenses [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Restructuring expense	'	'	'	'	'	$27.40	'	'	$52.30	$27.40	'
Program termination agreement	'	'	'	'	'	'	'	'	11.3	'	'
Retirement related obligations	'	'	'	'	'	'	'	'	5.9	17.3	'
Loss from disposal activities	'	'	'	'	'	'	'	'	'	39.7	21.5
Patent infringement settlement, net of legal costs incurred	'	'	'	'	'	'	'	'	'	'	-29.1
Other Nonoperating Income (Expense)	'	'	'	'	'	'	'	'	-6.9	'	-0.5
Other	'	'	'	'	'	'	'	'	'	0.3	'
Other expense (income)	-51.8	3.7	2.4	-16.9	-17.3	-29.7	-36.6	-1.1	-62.6	-84.7	8.1
Employee termination benefits	'	'	'	'	'	'	'	'	10.4	9	'
Contract cancellation charges	'	'	'	'	'	'	'	'	'	6.3	'
Asset Impairment Charges	'	'	'	'	'	'	'	'	37.3	'	'
Other restructuring charges	'	'	'	'	'	'	'	'	4.6	12.1	'
Employee termination benefits, number of employees effected	'	'	'	'	'	'	'	'	300	'	'
Recognized net (gain) loss due to settlements	'	'	'	'	'	'	'	'	'	5.7	'
Executive retirement incremental compensation expense	'	'	'	'	'	'	'	'	'	11.6	'
Patent infringement settlement - Cash received	'	'	'	'	'	'	'	'	'	'	32.5
Patent infringement settlement - Expense	'	'	'	'	'	'	'	'	'	'	$3.40

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings before income taxes and the provision for income taxes	'	'	'	'	'	'	'	'	'	'	'
Loss before income taxes - U.S.	'	'	'	'	'	'	'	'	$136.20	$132.30	$119.20
Earnings before income taxes - Non-U.S.	'	'	'	'	'	'	'	'	733.1	628.7	646.7
Earnings before income taxes - total	193.9	229.2	246.7	199.5	175	170.1	194.7	221.2	869.3	761	765.9
Current:	'	'	'	'	'	'	'	'	'	'	'
Federal	'	'	'	'	'	'	'	'	27.7	59.8	31.8
Foreign	'	'	'	'	'	'	'	'	211.1	186.1	162.9
State	'	'	'	'	'	'	'	'	2.6	3.4	1.7
Total current	'	'	'	'	'	'	'	'	241.4	249.3	196.4
Deferred:	'	'	'	'	'	'	'	'	'	'	'
Federal	'	'	'	'	'	'	'	'	-2.3	19.6	17.3
State	'	'	'	'	'	'	'	'	-7.3	-0.1	0.1
Foreign	'	'	'	'	'	'	'	'	-13.5	-30.2	-18.5
Total deferred	'	'	'	'	'	'	'	'	-23.1	-10.7	-1.1
Provision for income taxes	$44.50	$56.30	$66.60	$50.90	$48.40	$64.20	$68.50	$57.50	$218.30	$238.60	$195.30
Effective tax rate	'	'	'	'	'	'	'	'	25.10%	31.40%	25.50%

Income_Taxes_Income_Tax_Reconc

Income Taxes - Income Tax Reconciliation (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Effective Income Tax Rate Reconciliation, Amount [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Income taxes at U.S. statutory rate of 35%	'	'	'	'	'	'	'	'	$304.30	$266.40	$268.10
State taxes, net of federal benefit	'	'	'	'	'	'	'	'	2.3	2.2	1.1
U.S. tax on non-U.S. earnings	'	'	'	'	'	'	'	'	-2.8	22.3	9.4
Affiliates' earnings	'	'	'	'	'	'	'	'	-15.6	-15	-13.4
Foreign rate differential	'	'	'	'	'	'	'	'	-73.4	-57.9	-60
Tax holidays	'	'	'	'	'	'	'	'	-15.6	-27	-21.3
Withholding taxes	'	'	'	'	'	'	'	'	15.4	12.3	10.9
Impairments and write-offs	'	'	'	'	'	'	'	'	5.2	15.9	6.4
Tax credits	'	'	'	'	'	'	'	'	-6.9	-2.3	-4
Reserve adjustments, settlements and claims	'	'	'	'	'	'	'	'	0.5	12.9	-1
Valuation allowance adjustments	'	'	'	'	'	'	'	'	-1.4	9.7	-5.3
Other	'	'	'	'	'	'	'	'	6.3	-0.9	4.4
Provision for income taxes	44.5	56.3	66.6	50.9	48.4	64.2	68.5	57.5	218.3	238.6	195.3
Tax benefit associated with restructuring	'	'	'	'	'	7.7	'	'	7.1	7.7	'
Tax benefit of project termination settlement	'	'	'	'	'	'	'	'	3.8	'	'
Tax benefit associated retirement obligations	'	'	'	'	6.1	'	'	'	2.1	'	'
Other tax adjustments	'	5.6	'	1.7	3.9	6.9	'	'	11.7	19.8	6.2
Tax benefit of research and development and international tax credit extensions	'	'	'	6.6	'	'	'	'	6.7	'	'
2012 return to provision and other adjustments	'	-3.1	'	'	'	'	'	'	2.2	'	'
Reversal of certain state valuation allowances	4.4	2.5	'	'	'	'	'	'	8	'	'
Tax impact of other tax adjustments	'	'	'	4.9	'	'	'	'	5.2	'	'
Tax benefit (expense) associated with disposal activities and restructuring	'	'	'	'	'	'	'	'	'	2	'
Tax impact of loss on disposals	'	11.2	'	'	'	'	5.5	'	'	5.7	2.7
Settlement of certain tax audits	'	'	'	'	'	'	'	'	'	5.9	'
Impact of change in repatriation assertion	'	'	'	'	'	'	9	'	'	7.5	'
Change in enacted tax rate	'	'	'	'	'	'	'	'	'	4.7	'
Tax impact of writedown of tax accounts	'	'	'	'	'	'	'	'	'	11.1	'
Tax impact of patent infringement settlement	'	'	'	'	'	'	'	'	'	'	$11

Income_Taxes_Unrecognized_Tax_

Income Taxes - Unrecognized Tax Benefits (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of the total gross unrecognized tax benefits	'	'
Balance, January 1	$25.80	$26.20
Additions based on tax positions related to current year	1.7	2
Additions for tax positions of prior years	12.5	13.4
Reductions for closure of tax audits and settlements	-17.7	-14.6
Reductions for lapse in statute of limitations	-0.2	-1.7
Translation adjustment	0.8	0.5
Balance, December 31	22.9	25.8
Unrecognized tax benefits that would impact effective tax rate	15.7	'
Income tax penalties and interest expense	1	0.5
Income tax penalties and interest accrued on unrecognized tax benefits	8.4	8.3
Non-U.S. Tax Jurisdiction	'	'
Reconciliation of the total gross unrecognized tax benefits	'	'
Reductions for closure of tax audits and settlements	($14.90)	'

Income_Taxes_Income_Tax_Examin

Income Taxes - Income Tax Examinations (Details)	12 Months Ended
	Dec. 31, 2013
U.S. Federal	'
Major tax payer in tax Jurisdiction	'
Years no longer subject to examination	'2010 and prior
China	'
Major tax payer in tax Jurisdiction	'
Years no longer subject to examination	'2007 and prior
France	'
Major tax payer in tax Jurisdiction	'
Years no longer subject to examination	'2007 and prior
Germany	'
Major tax payer in tax Jurisdiction	'
Years no longer subject to examination	'2007 and prior
Hungary	'
Major tax payer in tax Jurisdiction	'
Years no longer subject to examination	'2008 and prior
Japan	'
Major tax payer in tax Jurisdiction	'
Years no longer subject to examination	'2011 and prior
South Korea	'
Major tax payer in tax Jurisdiction	'
Years no longer subject to examination	'2007 and prior
Sweden	'
Major tax payer in tax Jurisdiction	'
Years no longer subject to examination	'2007 and prior

Income_Taxes_Components_of_Def

Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Deferred tax assets:	'	'
Foreign tax credits	$145.90	$146
Employee compensation	40.6	53.1
Other comprehensive income	79.3	113.7
Research and development capitalization	132.4	102.5
Net operating loss and capital loss carryforwards	46.4	44.3
Pension and other postretirement benefits	36.5	37.7
Other	75.8	44.1
Total deferred tax assets	556.9	541.4
Valuation allowance	-34.2	-35
Net deferred tax asset	522.7	506.4
Deferred tax liabilities:	'	'
Goodwill and intangible assets	-139.5	-130.9
Fixed assets	-105.4	-101.9
Other	-36.7	-25.6
Total deferred tax liabilities	-281.6	-258.4
Net deferred taxes	$241.10	$248

Income_Taxes_Income_Taxes_Oper

Income Taxes Income Taxes - Operating Loss Carryforwards (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Operating Loss Carryforwards [Line Items]	'	'
Net operating loss and capital loss carryforwards	$46,400,000	$44,300,000
State Operating Loss Carryforwards	501,400,000	'
Unremitted foreign earnings	18,700,000	'
Undistributed Earnings of Foreign Subsidiaries	2,300,000,000	'
U.S. Federal	'	'
Operating Loss Carryforwards [Line Items]	'	'
Foreign tax credit carryforwards	145,900,000	'
Non-U.S. Tax Jurisdiction	'	'
Operating Loss Carryforwards [Line Items]	'	'
Operating Loss Carryforwards	58,000,000	'
Operating Loss Carryforwards subject to expiration	48,400,000	'
Operating Loss Carryforwards not subject to expiration	9,600,000	'
Operating Loss Carryforwards valuation allowance	1,500,000	'
Net operating loss and capital loss carryforwards	4,900,000	'
Non-U.S. income tax holidays	15,600,000	26,700,000
State and Local Jurisdiction	'	'
Operating Loss Carryforwards [Line Items]	'	'
Operating Loss Carryforwards valuation allowance	$300,800,000	'

Balance_Sheet_Information_Deta

Balance Sheet Information (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Receivables, net:	'	'	'
Customers	$1,067.50	$1,014.60	'
Other	183.1	134.8	'
Gross receivables	1,250.60	1,149.40	'
Bad debt allowance(a)	-2.1	-2.1	'
Total receivables, net	1,248.50	1,147.30	'
Inventories, net:	'	'	'
Raw material and supplies	279.8	264	'
Work in progress	78	82	'
Finished goods	116.3	117.6	'
FIFO inventories	474.1	463.6	'
LIFO reserve	-16	-16	'
Total inventories, net	458.1	447.6	'
Prepayments and other current assets:	'	'	'
Prepaid tooling	37.1	39.1	'
Derivatives	3.4	5.7	'
Prepaid taxes	12.3	0.7	'
Other	30.9	22	'
Total prepayments and other current assets	83.7	67.5	'
Property, plant and equipment, net:	'	'	'
Property, plant and equipment, gross	2,926.10	3,245.60	'
Accumulated depreciation	1,099.30	1,567	'
Property, plant & equipment, net, excluding tooling	1,826.80	1,678.60	'
Tooling, net of amortization	112.6	109.4	'
Property, plant & equipment, net	1,939.40	1,788	'
Investments and advances:	'	'	'
Investment in equity affiliates	201.5	217.7	'
Other investments and advances	203.6	165	'
Total investments and advances	405.1	382.7	'
Other non-current assets:	'	'	'
Deferred income taxes	257.6	244.1	'
Other intangible assets	169.5	206.3	'
Product liability insurance asset	96.7	85.6	'
Other	53.2	39.9	'
Total other non-current assets	577	575.9	'
Accounts payable and accrued expenses:	'	'	'
Trade payables	872.6	815.4	'
Trade payables for capital expenditures	62.8	39.8	'
Payroll and employee related	184.6	180.7	'
Product liability	41.1	36.5	'
Customer related	49.7	36.3	'
Product warranties	38.4	33.1	'
Retirement related	21.8	27.9	'
Interest	12	11.7	'
Severance	7.4	9.8	'
Dividends payable to noncontrolling shareholders	16.7	9.5	'
Insurance	8.2	9.2	'
Severance	11.3	8.9	'
Legal and professional fees	7.8	4.2	'
Environmental	1.1	1.6	'
Current deferred income taxes	3.9	1.4	'
Other	44.4	61.2	'
Total accounts payable and accrued expenses	1,383.80	1,287.20	'
Other non-current liabilities:	'	'	'
Deferred income taxes	81.3	89.4	'
Cross-currency swaps and derivatives	24.3	58.1	'
Product liability	55.6	49.1	'
Product warranties	34.3	31.8	'
Deferred revenue	46.2	30.5	'
Environmental	2.9	2.3	'
Other	82.2	56.9	'
Total other non-current liabilities	326.8	318.1	'
Bad debt allowance	'	'	'
Interest costs capitalized	11.9	17.8	'
Land [Member]	'	'	'
Property, plant and equipment, net:	'	'	'
Property, plant and equipment, gross	87.2	76.4	'
Building [Member]	'	'	'
Property, plant and equipment, net:	'	'	'
Property, plant and equipment, gross	666.7	640.8	'
Machinery and equipments	'	'	'
Property, plant and equipment, net:	'	'	'
Property, plant and equipment, gross	1,897.50	2,282.40	'
Capital leases	'	'	'
Property, plant and equipment, net:	'	'	'
Property, plant and equipment, gross	2.4	2.3	'
Construction in progress	'	'	'
Property, plant and equipment, net:	'	'	'
Property, plant and equipment, gross	272.3	243.7	'
Allowance for Doubtful Accounts [Member]	'	'	'
Bad debt allowance	'	'	'
Beginning balance, January 1	-2.1	-4.3	-4
Provision	-0.3	-0.8	-1.4
Write-offs	0.4	3	1
Translation adjustment and other	-0.1	'	0.1
Ending balance, December 31	($2.10)	($2.10)	($4.30)

Balance_Sheet_Information_Equi

Balance Sheet Information - Equity Method Investment (Details) (NSK Warner [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Nov. 30, 2013	Dec. 31, 2012	Nov. 30, 2012	Dec. 31, 2011	Nov. 30, 2011	Nov. 01, 2013	Nov. 01, 2012
NSK Warner [Member]	'	'	'	'	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'	'	'
Equity investment in NSK Warner, percent	50.00%	'	'	'	'	'	'	'
Joint Venture Partner Interest In Subsidiary	40.00%	'	'	'	'	'	'	'
Equity Method Investment, Dividends or Distributions	$31	'	$28.10	'	$33.40	'	'	'
Equity Method Investment, Summarized Financial Information [Abstract]	'	'	'	'	'	'	'	'
Cash and securities	'	'	'	'	'	'	118.3	123.3
Current assets, including cash and securities	'	'	'	'	'	'	313.6	320
Non-current assets	'	'	'	'	'	'	156.1	175.3
Current liabilities	'	'	'	'	'	'	166.8	147.4
Non-current liabilities	'	'	'	'	'	'	40.7	50.2
Total equity	'	'	'	'	'	'	262.2	297.7
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]	'	'	'	'	'	'	'	'
Net sales	'	604	'	696.7	'	655.2	'	'
Gross profit	'	126.6	'	138.2	'	128.5	'	'
Net earnings	'	68.3	'	68.5	'	61.6	'	'
Purchases from Equity Method Investee	$22.80	'	$22.80	'	$16.60	'	'	'

Goodwill_and_Other_Intangibles2

Goodwill and Other Intangibles - Goodwill (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Goodwill [Line Items]	'		'		'
Impairment	$13.90	[1]	'		'
Changes in the carrying amount of goodwill	'		'		'
Net goodwill balance, January 1	1,181.40		'		'
Ending balance, December 31	1,197		'		'
Goodwill impairment test, weighted average cost of capital discount rate for future cash flow	10.00%		'		'
Sensitivity analysis Increase in discount rate	1.00%		'		'
Sensitivity analysis decrease in operating margin assumption	1.00%		'		'
Engine [Member]	'		'		'
Changes in the carrying amount of goodwill	'		'		'
Gross goodwill balance, January 1	1,324.10		1,334.70		'
Accumulated impairment losses, January 1	'		-501.8		-501.8
Net goodwill balance, January 1	822.3		832.9		'
Divestitures	-4.6		-16.9	[2]	'
Translation adjustment and other	12.4		6.3		'
Ending balance, December 31	830.1		822.3		'
Drivetrain [Member]	'		'		'
Changes in the carrying amount of goodwill	'		'		'
Gross goodwill balance, January 1	359.3		353.5		'
Accumulated impairment losses, January 1	'		-0.2		-0.2
Net goodwill balance, January 1	359.1		353.3		'
Translation adjustment and other	7.8		5.8		'
Ending balance, December 31	$366.90		$359.10		'
[1]	*Impairment relates to Drivetrain customer relationships and Engine unamortized trade names. The impairment charges are recorded in restructuring expense in Other expense (income).
[2]	Goodwill divested relates to the Company's 2012 sale of the spark plug business.

Goodwill_and_Other_Intangibles3

Goodwill and Other Intangibles - Intangible Assets (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Intangible Assets, Net (Excluding Goodwill) [Abstract]	'		'		'
Amortized intangible assets, gross	$290.60		$299.20		'
Amortized intangible assets, accumulated amortization	150.8		129.1		98.4
Amortized intangible assets, net	139.8		170.1		'
Other intangible assets	169.5		206.3		'
Amortization of intangible assets and other	26.7		28.4		30.8
Amortized intangible assets, future amortization expense [Abstract]	'		'		'
Future Amortization Expense - 2014	25.4		'		'
Future Amortization Expense - 2015	16.4		'		'
Future Amortization Expense - 2016	16.3		'		'
Future Amortization Expense - 2017	14.9		'		'
Future Amortization Expense - 2018	13.3		'		'
Intangible assets (excluding goodwill), gross [Roll Forward]	'		'		'
Beginning balance, January 1	335.4		341.7		'
Impairment	-26.4	[1]	'		'
Divestiture	-1.1	[2]	-15.7	[2]	'
Translation adjustment	12.4		9.4		'
Ending balance, December 31	320.3		335.4		341.7
Intangible assets, accumulated amortization [Roll Forward]	'		'		'
Beginning balance, January 1	129.1		98.4		'
Impairment	-13.9	[1]	'		'
Divestiture	-0.4	[2]	-0.6	[2]	'
Translation adjustment	9.3		2.9		'
Ending balance, December 31	150.8		129.1		98.4
Patented and unpatented technology [Member]	'		'		'
Intangible Assets, Net (Excluding Goodwill) [Abstract]	'		'		'
Amortized intangible assets, gross	85.9		80		'
Amortized intangible assets, accumulated amortization	36.5		26.2		'
Amortized intangible assets, net	49.4		53.8		'
Intangible assets, accumulated amortization [Roll Forward]	'		'		'
Ending balance, December 31	36.5		26.2		'
Customer relationships	'		'		'
Intangible Assets, Net (Excluding Goodwill) [Abstract]	'		'		'
Amortized intangible assets, gross	201.8		216.3		'
Amortized intangible assets, accumulated amortization	111.4		100		'
Amortized intangible assets, net	90.4		116.3		'
Intangible assets, accumulated amortization [Roll Forward]	'		'		'
Ending balance, December 31	111.4		100		'
Miscellaneous amortizable assets	'		'		'
Intangible Assets, Net (Excluding Goodwill) [Abstract]	'		'		'
Amortized intangible assets, gross	2.9		2.9		'
Amortized intangible assets, accumulated amortization	2.9		2.9		'
Intangible assets, accumulated amortization [Roll Forward]	'		'		'
Ending balance, December 31	2.9		2.9		'
In-process research and development	'		'		'
Intangible Assets, Net (Excluding Goodwill) [Abstract]	'		'		'
Indefinite-lived intangible assets (excluding goodwill)	10.8		10.8		'
Unamortized trade names	'		'		'
Intangible Assets, Net (Excluding Goodwill) [Abstract]	'		'		'
Unamortized trade names	$18.90		$25.40		'
Minimum [Member]	'		'		'
Amortized intangible assets, future amortization expense [Abstract]	'		'		'
Amortized intangible assets, useful life	'3 years		'		'
Maximum [Member]	'		'		'
Amortized intangible assets, future amortization expense [Abstract]	'		'		'
Amortized intangible assets, useful life	'15 years		'		'
[1]	*Impairment relates to Drivetrain customer relationships and Engine unamortized trade names. The impairment charges are recorded in restructuring expense in Other expense (income).
[2]	Divestitures relate to the Company's 2012 sale of the spark plug business.

Product_Warranty_Details

Product Warranty (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]	'	'
Beginning balance, January 1	$64.90	$72.70
Provisions	43.1	33.7
Payments	-36.7	-42.8
Translation adjustment	1.4	1.3
Ending balance, December 31	72.7	64.9
Product Warranty Accrual, Balance Sheet Classification [Abstract]	'	'
Accounts payable and accrued expenses	38.4	33.1
Other non-current liabilities	34.3	31.8
Total product warranty liability	$72.70	$64.90

Notes_Payable_and_LongTerm_Deb2

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

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2012

Nov. 30, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Nov. 01, 2012

Sep. 08, 2010

Dec. 21, 2009

Dec. 31, 2012

Dec. 31, 2011

Apr. 09, 2009

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Apr. 12, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Total Short Term Debt [Member]

Total Short Term Debt [Member]

Short Term Borrowings [Member]

Short Term Borrowings [Member]

Receivables Securitization [Member]

Receivables Securitization [Member]

Receivables Securitization [Member]

Receivables Securitization [Member]

Receivables Securitization [Member]

Convertible Senior Notes Due April 2012 [Member]

Convertible Senior Notes Due April 2012 [Member]

Convertible Senior Notes Due April 2012 [Member]

Senior Notes One [Member]

Senior Notes Due November 2016 [Member]

Senior Notes Due November 2016 [Member]

Senior Notes Due October 2019 [Member]

Senior Notes Due October 2019 [Member]

Senior Notes Due September 2020 [Member]

Senior Notes Due September 2020 [Member]

Senior Notes Due February 2029 [Member]

Senior Notes Due February 2029 [Member]

Multi Currency Revolving Credit Facility [Member]

Multi Currency Revolving Credit Facility [Member]

Multi Currency 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]

Short-term debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total short-term debt

'

'

'

$194,800,000

$239,100,000

$84,800,000

$129,100,000

$110,000,000

$110,000,000

$110,000,000

$80,000,000

$50,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term Debt, by Current and Noncurrent [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total long-term debt

828,100,000

'

1,027,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

149,700,000

149,600,000

133,900,000

133,900,000

248,200,000

247,900,000

119,400,000

119,400,000

320,000,000

'

140,000,000

40,400,000

17,100,000

16,200,000

20,200,000

Current portion of long-term debt

4,300,000

'

6,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, net of current portion

823,800,000

'

1,021,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument par value

'

'

'

'

'

'

'

'

'

'

'

'

'

'

373,800,000

'

150,000,000

'

134,000,000

'

250,000,000

'

121,000,000

'

'

'

'

'

'

'

'

Debt instrument stated interest rate

'

'

'

'

'

'

'

'

'

'

'

'

3.50%

'

'

'

5.75%

'

8.00%

'

4.63%

'

7.13%

'

'

'

'

'

'

'

'

Debt instrument maturity period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1-Nov-16

'

1-Oct-19

'

15-Sep-20

'

15-Feb-29

'

'

'

'

'

'

'

'

Weighted average interest rate

4.00%

'

3.70%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term Debt, by Maturity [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2014

'

'

201,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2015

'

'

25,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2016

'

'

478,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

After 2018

'

'

520,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total payments

'

'

1,226,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Less: unamortized discounts

'

'

3,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total

'

'

1,222,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Multi-currency revolving credit agreement, current borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

750,000,000

650,000,000

'

'

'

'

'

Multi-currency revolving credit agreement, maximum borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000,000

'

'

'

'

'

'

Debt conversion, original debt, amount

373,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Issued During Period, Shares, Conversion of Convertible Securities

22,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Conversion of convertible securities, value of shares issued

617,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Adjustments to additional paid in capital, equity component of convertible debt

243,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest expense

'

'

'

'

'

'

'

'

'

'

'

'

9,000,000

33,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Non-cash portion

'

'

'

'

'

'

'

'

'

'

'

'

5,300,000

20,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Bond hedge overlay at net pre-tax cost

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Conversion premium after bond hedge overlay

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Conversion price per share after bond hedge overlay

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$19.31

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Treasury stock received from bond hedge, shares

13,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Treasury stock received from bond hedge, value

503,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Adjustments to additional paid in capital, bond hedge

503,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Treasury stock issued due to settlement of warrant, shares

9,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Treasury stock issue due to settlement of warrant, value

'

338,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Adjustments to additional paid in capital, warrant

338,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated fair value of senior unsecured notes

770,300,000

'

729,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair value higher than carrying value for senior unsecured notes

119,500,000

'

78,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding letters of credit

$59,100,000

'

$27,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Foreign currency contracts	$3.40	$5.90
Other non-current assets (insurance settlement agreement note receivable)	35.6	41
Liabilities, Fair Value Disclosure [Abstract]	'	'
Foreign currency contracts	7.4	9.8
Net investment hedge contracts	24.3	58.1
Fair Value, Inputs, Level 2 [Member]	'	'
Assets, Fair Value Disclosure [Abstract]	'	'
Foreign currency contracts	3.4	5.9
Other non-current assets (insurance settlement agreement note receivable)	35.6	41
Liabilities, Fair Value Disclosure [Abstract]	'	'
Foreign currency contracts	7.4	9.8
Net investment hedge contracts	$24.30	$58.10

Fair_Value_Measurements_Define

Fair Value Measurements - Defined Benefit Plan Assets (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
U.S. Plans:	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	$274.10	$282.70	$290.40
Non-U.S. Plans:	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	345	177.9	154.9
Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	274.1	282.7	'
Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 1 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	50.5	48.9	'
Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	223.6	233.8	'
Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	345	177.9	'
Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 1 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	70.5	'	'
Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	274.5	177.9	'
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	147.2	157.4	'
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	147.2	157.4	'
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	143.7	67.3	'
Fixed Income Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	143.7	67.3	'
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	100.9	100	'
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 1 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	50.5	48.9	'
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	50.4	51.1	'
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	188.2	99	'
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 1 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	70.5	'	'
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	117.7	99	'
Real estate and other | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	26	25.3	'
Real estate and other | Fair Value, Measurements, Recurring [Member] | U.S. Plans: | Fair Value, Inputs, Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	26	25.3	'
Real estate and other | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Estimate of Fair Value, Fair Value Disclosure [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	13.1	11.6	'
Real estate and other | Fair Value, Measurements, Recurring [Member] | Non-U.S. Plans: | Fair Value, Inputs, Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Fair Value of Plan Assets	$13.10	$11.60	'

Financial_Instruments_Details

Financial Instruments (Details)

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

In Millions, unless otherwise specified

Net investment hedge contracts [Member]

Net investment hedge contracts [Member]

Net investment hedge contracts [Member]

Net investment hedge contracts [Member]

Net investment hedge contracts [Member]

Net investment hedge contracts [Member]

Net investment hedge contracts [Member]

Net investment hedge contracts [Member]

Brazilian real

British pound

Chinese yuan

Chinese yuan

Euro

Euro

Euro

Euro

Euro

Euro

Euro

Euro

Euro

Euro

Euro

Hungarian forint

Japanese yen

Japanese yen

Japanese yen

Japanese yen

Korean won

Korean won

Korean won

Korean won

19-Oct

19-Oct

19-Oct

19-Oct

16-Nov

16-Nov

16-Nov

16-Nov

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

Foreign currency contracts [Member]

USD ($)

EUR (€)

USD ($)

EUR (€)

USD ($)

JPY (¥)

USD ($)

JPY (¥)

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Two [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period One [Member]

Maturity Of Derivatives Period One [Member]

Maturity Of Derivatives Period One [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period One [Member]

Maturity Of Derivatives Period Two [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Five [Member]

Maturity Of Derivatives Period Five [Member]

Maturity Of Derivatives Period Two [Member]

EUR (€)

EUR (€)

USD ($)

JPY (¥)

USD ($)

GBP (£)

JPY (¥)

PLN

USD ($)

GBP (£)

JPY (¥)

PLN

HUF

KRW

HUF

EUR (€)

USD ($)

USD ($)

CNY

KRW

USD ($)

EUR (€)

EUR (€)

JPY (¥)

Derivative [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notional in traded currency

$75

€ 58.50

$75

€ 58.50

$150

¥ 17,581.5

$150

¥ 17,581.5

€ 19.30

€ 28.80

$12.30

¥ 215

$29.40

£ 3

¥ 5,830.7

96

$15.20

£ 4.7

¥ 6,760

87.4

6,430.50

663.1

9,300

€ 6.60

$4.20

$9.50

84

5,715.50

$17.50

€ 23.60

€ 32.40

¥ 380.5

Financial_Instruments_Foreign_

Financial Instruments - Foreign currency derivatives (Details) (Foreign currency contracts [Member])

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

In Millions, unless otherwise specified

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Three [Member]

Maturity Of Derivatives Period Five [Member]

Maturity Of Derivatives Period Five [Member]

Maturity Of Derivatives Period Two [Member]

Maturity Of Derivatives Period Two [Member]

Maturity Of Derivatives Period Two [Member]

Maturity Of Derivatives Period One [Member]

Maturity Of Derivatives Period One [Member]

Maturity Of Derivatives Period One [Member]

Maturity Of Derivatives Period One [Member]

Maturity Of Derivatives Period Four [Member]

British pound

Euro

Euro

Euro

Euro

Euro

Euro

Euro

Euro

Japanese yen

Japanese yen

Korean won

Mexican peso

US dollar

US dollar

Korean won

Korean won

Japanese yen

Korean won

Swedish krona

Euro

Euro

Euro

Japanese yen

US dollar

EUR (€)

USD ($)

GBP (£)

JPY (¥)

PLN

USD ($)

GBP (£)

JPY (¥)

PLN

USD ($)

USD ($)

USD ($)

USD ($)

JPY (¥)

JPY (¥)

EUR (€)

EUR (€)

KRW

JPY (¥)

EUR (€)

HUF

KRW

HUF

CNY

INR

Derivative [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notional in traded currency

€ 28.80

$29.40

£ 3

¥ 5,830.7

96

$15.20

£ 4.7

¥ 6,760

87.4

$4.20

$9.50

$17.50

$20.90

¥ 3,209.3

¥ 3,000

€ 23.60

€ 32.40

5,715.50

¥ 380.5

€ 33.70

6,430.50

663.1

9,300

84

111.1

Financial_Instruments_Balance_

Financial Instruments - Balance Sheet (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Foreign currency contracts [Member] | Other non-current assets	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative assets	'	$0.20
Foreign currency contracts [Member] | Prepayments and other current assets	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative assets	3.4	5.7
Foreign currency contracts [Member] | Accounts payable and accrued expenses	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative liabilities	7.4	9.8
Net investment hedge contracts [Member] | Other non-current liabilities	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative liabilities	$24.30	$58.10

Financial_Instruments_Income_S

Financial Instruments - Income Statement (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Market value of hedge instruments	($25.80)	($58)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	-3.7	'
Foreign currency contracts [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Market value of hedge instruments	-3.7	-3.5
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	-3.7	'
Foreign currency contracts [Member] | Sales [Member]	'	'
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]	'	'
Gain (loss) reclassified from AOCI to income (effective portion)	1.7	5.3
Foreign currency contracts [Member] | Selling general and administrative expenses [Member]	'	'
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]	'	'
Gain (loss) reclassified from AOCI to income (effective portion)	-0.4	'
Gain (loss) recognized in income (ineffective portion)	0.2	'
Foreign currency contracts [Member] | Cost of goods sold [Member]	'	'
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]	'	'
Gain (loss) reclassified from AOCI to income (effective portion)	-13.9	3.5
Foreign currency contracts [Member] | Selling general and administrative expenses One [Member]	'	'
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]	'	'
Gain (loss) recognized in income (ineffective portion)	-1.5	0.1
Net investment hedge contracts [Member]	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'
Market value of hedge instruments	-22.1	-54.5
Net investment hedge contracts [Member] | Interest expense [Member]	'	'
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]	'	'
Gain (loss) recognized in income (ineffective portion)	$1.30	$2.30

Retirement_Benefit_Plans_Detai

Retirement Benefit Plans (Details) (USD $)	12 Months Ended					3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2010	Dec. 31, 2011
				Minimum [Member]	Maximum [Member]	Muncie Plant [Member]	Muncie Plant [Member]
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'	'	'	'
Recognized net (gain) loss due to settlements	'	$5.70	'	'	'	'	'
Employer contribution	'	'	'	'	'	23	15
Estimated future employer contributions in next fiscal year	'	'	'	15	25	'	'
Defined contribution expense	24.9	24.8	18.9	'	'	'	'
Defined benefit pension expense	24.3	27.3	17.5	'	'	'	'
Other postretirement employee benefit expense	5.7	11.1	13.5	'	'	'	'
Total	54.9	63.2	49.9	'	'	'	'
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year, Under Contractual Obligation	$2.80	'	'	'	'	'	'

Retirement_Benefit_Plans_Benef

Retirement Benefit Plans - Benefit Obligation and Plan Assets (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Amounts recognized in Balance Sheet [Abstract]	'		'		'
Non-current liabilities	($312.90)		($509.70)		'
NSK Warner [Member]	'		'		'
Amounts recognized in accumulated other comprehensive Income Loss) [Abstract]	'		'		'
Net amount recognized	4.9	[1]	7.9	[1]	'
U.S. Plans:	'		'		'
Change in benefit obligation [Roll Forward]	'		'		'
Projected benefit obligation, January 1	330.1		337.4		'
Interest cost	11.6		14.3		16.1
Actuarial (gain) loss	-18.7		15.5		'
Benefits paid	-29.4		-37.1		'
Projected benefit obligation, December 31	293.6		330.1		337.4
Change in plan assets:	'		'		'
Fair value of plan assets, January 1	282.7		290.4		'
Actual return on plan assets	20.8		29.4		'
Fair value of plan assets, December 31	274.1		282.7		290.4
Funded status of plan	-19.5		-47.4		'
Amounts recognized in Balance Sheet [Abstract]	'		'		'
Current liabilities	-0.1		-0.1		'
Non-current liabilities	-19.4		-47.3		'
Pension and Other Postretirement Defined Benefit Plans, Liabilities	-19.5		-47.4		'
Amounts recognized in accumulated other comprehensive Income Loss) [Abstract]	'		'		'
Net actuarial loss	115		163.8		'
Net prior service cost (credit)	9.7		-10.5		'
Net amount recognized	124.7	[1]	153.3	[1]	'
Defined Benefit Plan, Accumulated Benefit Obligation	293.6		330.1		'
Non-U.S. Plans:	'		'		'
Change in benefit obligation [Roll Forward]	'		'		'
Projected benefit obligation, January 1	447.6		344.3		'
Service cost	12.4		9.1		9.1
Interest cost	16.6		17.2		17.8
Plan participants’ contributions	0.4		0.5		'
Plan amendments	0.6		'		'
Actuarial (gain) loss	11.8		84.1		'
Currency translation	10.6		11.3		'
Other	-2.7		-4.5		'
Benefits paid	-14.6		-14.4		'
Projected benefit obligation, December 31	482.7		447.6		344.3
Change in plan assets:	'		'		'
Fair value of plan assets, January 1	177.9		154.9		'
Actual return on plan assets	23.6		15		'
Employer contribution	150.4		18		'
Currency translation	7.7		6		'
Other	-0.4		-2.1		'
Fair value of plan assets, December 31	345		177.9		154.9
Funded status of plan	-137.7		-269.7		'
Amounts recognized in Balance Sheet [Abstract]	'		'		'
Current liabilities	-2.6		-7		'
Non-current liabilities	-135.1		-262.7		'
Pension and Other Postretirement Defined Benefit Plans, Liabilities	-137.7		-269.7		'
Amounts recognized in accumulated other comprehensive Income Loss) [Abstract]	'		'		'
Net actuarial loss	130.6		135.1		'
Net prior service cost (credit)	1.1		0.5		'
Net amount recognized	131.7	[1]	135.6	[1]	'
Defined Benefit Plan, Accumulated Benefit Obligation	464.8		430.2		'
U.S. other postretirement benefit plans [Member]	'		'		'
Change in benefit obligation [Roll Forward]	'		'		'
Projected benefit obligation, January 1	220.5		251		'
Service cost	0.4		0.5		0.7
Interest cost	6.8		10.1		11.8
Plan amendments	'		-0.3		'
Actuarial (gain) loss	-29.7		-20.7		'
Benefits paid	-20.5		-20.1		'
Projected benefit obligation, December 31	177.5		220.5		251
Change in plan assets:	'		'		'
Funded status of plan	-177.5		-220.5		'
Amounts recognized in Balance Sheet [Abstract]	'		'		'
Current liabilities	-19.1		-20.8		'
Non-current liabilities	-158.4		-199.7		'
Pension and Other Postretirement Defined Benefit Plans, Liabilities	-177.5		-220.5		'
Amounts recognized in accumulated other comprehensive Income Loss) [Abstract]	'		'		'
Net actuarial loss	44		78.7		'
Net prior service cost (credit)	-36.1		-42.6		'
Net amount recognized	$7.90	[1]	$36.10	[1]	'
[1]	AOCI shown above does not include our equity investee, NSK-Warner. NSK-Warner had an AOCI loss of $4.9 million and $7.9 million at December 31, 2013 and 2012, respectively.

Retirement_Benefit_Plans_Retir

Retirement Benefit Plans Retirement Benefit Plans - Funded status of plans with ABO in excess of plan assets (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Defined Benefit Plan Disclosure [Line Items]	'	'
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation	($752)	($757.70)
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets	612.7	458
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Deficiency	-139.3	-299.7
United States Pension Deficiency [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Deficiency	-19.5	-47.4
United Kingdom Pension Deficiency [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Deficiency	-15.3	-22.4
Germany Pension Deficiency [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Deficiency	-68.6	-192.4
Other Countries Pension Deficiency [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Deficiency	($35.90)	($37.50)

Retirement_Benefit_Plans_Asset

Retirement Benefit Plans - Asset Allocations (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]	'	'
Defined Contribution Plan, Employer Discretionary Contribution Amount	137.5	'
U.S. Plans:	'	'
Defined Benefit Plan, Assets for Plan Benefits [Abstract]	'	'
Asset allocations	100.00%	100.00%
Non-U.S. Plans:	'	'
Defined Benefit Plan, Assets for Plan Benefits [Abstract]	'	'
Asset allocations	100.00%	100.00%
Cash and Cash Equivalents [Member] | U.S. Plans:	'	'
Defined Benefit Plan, Assets for Plan Benefits [Abstract]	'	'
Asset allocations	9.00%	9.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]	'	'
Target allocation percentage of assets, fixed income securities, range minimum	5.00%	'
Target allocation percentage of assets, fixed income securities, range maximum	15.00%	'
Cash and Cash Equivalents [Member] | Non-U.S. Plans:	'	'
Defined Benefit Plan, Assets for Plan Benefits [Abstract]	'	'
Asset allocations	4.00%	6.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]	'	'
Target allocation percentage of assets, fixed income securities, range minimum	0.00%	'
Target allocation percentage of assets, fixed income securities, range maximum	7.00%	'
Fixed Income Funds [Member] | U.S. Plans:	'	'
Defined Benefit Plan, Assets for Plan Benefits [Abstract]	'	'
Asset allocations	54.00%	56.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]	'	'
Target allocation percentage of assets, fixed income securities, range minimum	45.00%	'
Target allocation percentage of assets, fixed income securities, range maximum	65.00%	'
Fixed Income Funds [Member] | Non-U.S. Plans:	'	'
Defined Benefit Plan, Assets for Plan Benefits [Abstract]	'	'
Asset allocations	42.00%	38.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]	'	'
Target allocation percentage of assets, fixed income securities, range minimum	37.00%	'
Target allocation percentage of assets, fixed income securities, range maximum	47.00%	'
Equity Securities [Member] | U.S. Plans:	'	'
Defined Benefit Plan, Assets for Plan Benefits [Abstract]	'	'
Asset allocations	37.00%	35.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]	'	'
Target allocation percentage of assets, fixed income securities, range minimum	25.00%	'
Target allocation percentage of assets, fixed income securities, range maximum	45.00%	'
Equity Securities [Member] | Non-U.S. Plans:	'	'
Defined Benefit Plan, Assets for Plan Benefits [Abstract]	'	'
Asset allocations	54.00%	56.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]	'	'
Target allocation percentage of assets, fixed income securities, range minimum	51.00%	'
Target allocation percentage of assets, fixed income securities, range maximum	61.00%	'

Retirement_Benefit_Plans_Net_P

Retirement Benefit Plans - Net Periodic Benefit Cost (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'	'	'
Recognized net (gain) loss due to settlements	'	$5.70	'
U.S. Plans:	'	'	'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'	'	'
Interest cost	11.6	14.3	16.1
Expected return on plan assets	-18.2	-18.8	-20.8
Settlements, curtailments and other	'	5.7	'
Amortization of unrecognized prior service benefit	-0.8	-0.7	-0.7
Amortization of unrecognized loss	8.2	8.1	6.5
Net periodic benefit cost	0.8	8.6	1.1
Non-U.S. Plans:	'	'	'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'	'	'
Service cost	12.4	9.1	9.1
Interest cost	16.6	17.2	17.8
Expected return on plan assets	-11	-9.3	-11.2
Settlements, curtailments and other	0.2	0.5	-0.1
Amortization of unrecognized loss	5.3	1.2	0.8
Net periodic benefit cost	23.5	18.7	16.4
U.S. other postretirement benefit plans [Member]	'	'	'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'	'	'
Service cost	0.4	0.5	0.7
Interest cost	6.8	10.1	11.8
Amortization of unrecognized prior service benefit	-6.4	-6.4	-6.9
Amortization of unrecognized loss	4.9	6.9	7.9
Net periodic benefit cost	5.7	11.1	13.5
Other post employment plans amortization of net losses expected in the next year	2.7	'	'
Amortization of net prior service cost expected in the next year	-6.4	'	'
Pension Plan, Defined Benefit [Member]	'	'	'
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]	'	'	'
Amortization of net (losses) expected in next year	$11.30	'	'

Retirement_Benefit_Plans_Assum

Retirement Benefit Plans - Assumptions Used (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]	'	'	'
Assumptions used calculating benefit obligation, rounding of the discount rate	0.25%	'	'
U.S. Plans:	'	'	'
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]	'	'	'
Assumptions used calculating benefit obligation, discount rate	4.41%	3.67%	'
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]	'	'	'
Assumptions used calculating net periodic benefit cost, discount rate	3.67%	4.42%	5.17%
Assumptions used calculating net periodic benefit cost, expected long-term return on assets	6.75%	6.75%	7.50%
Non-U.S. Plans:	'	'	'
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]	'	'	'
Assumptions used calculating benefit obligation, discount rate	3.90%	3.86%	'
Assumptions used calculating benefit obligation, rate of compensation increase	2.77%	2.72%	'
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]	'	'	'
Assumptions used calculating net periodic benefit cost, discount rate	3.86%	5.13%	5.37%
Assumptions used calculating net periodic benefit cost, rate of compensation increase	2.72%	2.78%	2.80%
Assumptions used calculating net periodic benefit cost, expected long-term return on assets	6.42%	6.49%	7.07%
U.S. other postretirement benefit plans [Member]	'	'	'
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]	'	'	'
Assumptions used calculating benefit obligation, discount rate	4.00%	3.25%	'
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]	'	'	'
Assumptions used calculating net periodic benefit cost, discount rate	3.25%	4.25%	4.75%

Retirement_Benefit_Plans_Estim

Retirement Benefit Plans - Estimated Future Payments (Details) (USD $)	Dec. 31, 2013
In Millions, unless otherwise specified
With Medicare Part D Reimbursement Other Post Employment Benefits [Member]	'
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]	'
2014	$19.50
2015	18.7
2016	17.7
2017	17.1
2018	16.6
2019-2023	65.6
U.S. Plans:	'
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]	'
2014	24
2015	23.1
2016	23
2017	22.2
2018	22.4
2019-2023	103.2
Non-U.S. Plans:	'
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]	'
2014	17.4
2015	20.7
2016	19.3
2017	20.6
2018	21.8
2019-2023	118.4
Without Medicare Part D Reimbursement Other Post Employment Benefits [Member]	'
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]	'
2014	19.5
2015	18.7
2016	17.7
2017	17.1
2018	16.6
2019-2023	$65.60

Retirement_Benefit_Plans_Healt

Retirement Benefit Plans - Health Care Trend Rates (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013
Assumed health care cost trend rates [Abstract]	'
Health care cost trend rate assumed for next fiscal year	7.10%
Ultimate health care cost trend rate	5.00%
Effect of one-percentage point change in assumed health care cost trend rates [Abstract]	'
Effect of one percentage point increase on accumulated postretirement benefit obligation	$12.60
Effect of one percentage point decrease on accumulated postretirement benefit obligation	-10.9
Effect of one percentage point increase on service and interest cost components	0.5
Effect of one percentage point decrease on service and interest cost components	($0.50)

Stock_Incentive_Plans_Details

Stock Incentive Plans (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Number of shares authorized for grant	25,000,000	'	'	'
Shares available for future issuance	3,100,000	'	'	'
Status of Stock Options	'	'	'	'
Shares outstanding under option, beginning balance	2,872,000	4,440,000	6,506,000	'
Shares outstanding under option, exercised	-870,000	-1,568,000	-2,066,000	'
Shares outstanding under option, ending balance	1,997,000	2,872,000	4,440,000	6,506,000
Weighted average exercise price, beginning balance	$15.33	$14.68	$14.32	'
Weighted average exercise price, exercised	$14.17	$13.43	$13.58	'
Weighted average exercise price, ending balance	$15.82	$15.33	$14.68	$14.32
Weighted average remaining contractual life outstanding, beginning balance	'	'3 years 5 months	'4 years 1 month	'4 years 11 months
Aggregate intrinsic value, outstanding, beginning balance	$58.80	$76.30	$142.20	'
Aggregate intrinsic value, exercised	25.5	40.1	48.4	'
Aggregate intrinsic value, outstanding, ending balance	80	58.8	76.3	142.2
Share under option, option exercisable	1,997,000	'	'	'
Weighted average exercise price, options exercisable	$15.82	'	'	'
Weighted average remaining contractual life option exercisable	'2 years 7 months	'	'	'
Aggregate intrinsic value, option exercisable	80	'	'	'
Proceeds from stock based compensation - gross	12.3	20.9	28.6	'
Tax benefit (loss)	20.7	31.1	24.4	'
Proceeds from stock based compensation - net	$33	$52	$53	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	'2 years 7 months	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	-5,000	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	$17.48	'	'	'

Stock_Incentive_Plans_Restrict

Stock Incentive Plans - Restricted Stock (Details) (Restricted Stock [Member], USD $)	3 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Restricted stock expense	'	$25.80	$21.20	$15.10
Restricted stock expense, net of tax	'	$18.80	$15.50	$11.40
Status of nonvested restricted stock [Roll Forward]	'	'	'	'
Nonvested shares subject to restriction, beginning balance	2,064,000	2,064,000	2,860,000	3,742,000
Nonvested shares subject to restriction, weighted average price, beginning balance	$29.39	$29.39	$19.51	$15.28
Nonvested shares subject to restriction, granted	746,394	782,000	676,000	548,000
Nonvested shares subject to restriction, weighted average price, granted	'	$37.82	$39.21	$35.28
Nonvested shares subject to restriction, vested	'	-1,322,000	-1,350,000	-1,218,000
Nonvested shares subject to restriction, weighted average price, vested	'	$24.36	$13.72	$13.70
Nonvested shares subject to restriction, forfeited	'	-113,000	-122,000	-212,000
Nonvested shares subject to restriction, weighted average price, forfeited	'	$36.59	$27.18	$19.02
Nonvested shares subject to restriction, ending balance	'	1,411,000	2,064,000	2,860,000
Nonvested shares subject to restriction, weighted average price, ending balance	'	$37.86	$29.39	$19.51
Director [Member]	'	'	'	'
Status of nonvested restricted stock [Roll Forward]	'	'	'	'
Nonvested shares subject to restriction, granted	'	28,280	'	'

Stock_Incentive_Plans_Performa

Stock Incentive Plans - Performance Share Plans (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Performance Share Plan Expense, Liability Portion	'		'		$19.60
Incremental modification expense	5.5		7		'
Performance Share Plans [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Awarding of performance shares earned payable in cash	'		40.00%		'
Awarding of performance shares earned payable in common stock	'		60.00%		'
Compensation expense recognized in cash by Company over the performance period	'		40.00%		'
Compensation expense recognized in common stock by Company over the performance period	'		60.00%		'
Performance share plan expense	$10.80		$35.50		$26.30
Performance share plan, shares issued in period	545,375	[1]	1,116,000	[1]	1,076,360	[1]
[1]	Shares are issued in February of the following year.

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'	'	'	'
Foreign currency translation adjustments	$181.10	$140.80	$85.80	$148
Hedge instruments	-16	-37.2	-50.5	-44.8
Defined benefit postretirement plans	-181.5	-225.8	-187.2	-158.1
Other	2.4	0.9	1.1	1.2
Accumulated other comprehensive loss	-14	-121.3	-150.8	-53.7
Comprehensive (loss) income before reclassifications, Foreign currency translation adjustments	40.3	38.2	-62.2	'
Comprehensive (loss) income before reclassifications, Hedge instruments	19.6	30.3	-9.2	'
Comprehensive (loss) income before reclassifications, Defined benefit postretirement plans	52.5	-60.8	-47.3	'
Comprehensive (loss) income before reclassifications, Other	1.5	-0.2	-0.1	'
Comprehensive (loss) income before reclassifications, Total	113.9	7.5	-118.8	'
Income taxes associated with comprehensive (loss) income before reclassifications, Hedge instruments	-8.1	-10.4	3	'
Income taxes associated with comprehensive (loss) income before reclassifications, Defined benefit postretirement plans	-15.8	16.2	13.3	'
Income taxes associated with comprehensive (loss) income before reclassifications, Total	-23.9	5.8	16.3	'
Reclassification from accumulated other comprehensive (loss) income, Foreign currency translation adjustments	'	16.8	'	'
Reclassification from accumulated other comprehensive (loss) income, Hedge instruments	12.6	-8.8	1.5	'
Reclassification from accumulated other comprehensive (loss) income, Defined benefit postretirement plans	11.2	9.1	7.6	'
Reclassification from accumulated other comprehensive (loss) income, Total	23.8	17.1	9.1	'
Income taxes reclassified into net earnings, Hedge instruments	-2.9	2.2	-1	'
Income taxes reclassified into net earnings, Defined benefit postretirement plans	-3.6	-3.1	-2.7	'
Income taxes reclassified into net earnings, Total	($6.50)	($0.90)	($3.70)	'

Contingencies_Details

Contingencies (Details) (USD $)

1 Months Ended

12 Months Ended

24 Months Ended

12 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Jul. 31, 2010

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2008

Dec. 31, 2012

Feb. 28, 2011

Nov. 30, 2010

Dec. 31, 2008

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

UAW Litigation [Member]

Estimated future settlement of existing claims [Member]

Estimated future settlement of existing claims [Member]

Asbestos Issue [Member]

Asbestos Issue [Member]

Non-Compensatory Damages [Member]

Accrual for Environmental Loss Contingencies Disclosure [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Waste disposal sites with potential liability under the Comprehensive Environmental Response, Compensation and Liability Act

'

32

'

'

'

'

'

'

'

'

'

'

'

'

Accrual for indicated environmental liabilities

'

$4

'

'

'

$3.90

'

'

'

'

'

'

'

'

Number of plaintiffs

'

'

'

'

340

'

'

'

'

'

'

'

'

'

Number of claimants settled and dismissed

2,700

'

'

'

'

'

'

'

'

'

'

1,500

2,400

'

Amount agreed to pay against settlement of unfiled claimants

'

'

'

28

'

'

'

'

'

'

'

'

'

'

First settlement payment made

'

'

'

'

'

'

'

13.9

'

'

'

'

'

'

Final settlement payment made

'

'

'

'

'

'

13.9

'

'

'

'

'

'

'

Contingencies [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loss as a result of the September 2008 DTP ruling

'

'

29.1

'

'

'

'

'

4

'

'

'

'

'

Number of pending claims

'

'

'

'

'

'

'

'

'

'

'

17,000

16,000

'

Payment being made to a claimant by or on behalf of the Company

'

'

'

'

'

'

'

'

'

'

'

297

308

'

Payment being made to a claimant by or on behalf of the company, percentage

'

'

'

'

'

'

'

'

'

'

'

20.00%

13.00%

'

Loss Contingency, Damages Awarded, Value

'

'

'

'

'

'

'

'

'

'

'

35

'

32.5

Surety Bond Posted Related to Appeal

'

'

'

'

'

'

'

'

'

'

'

55

'

'

Company paid in defense and indemnity in advance of insurers reimbursement

'

'

'

'

'

'

'

'

'

'

'

278.4

'

'

Cash and notes received from insurers

'

'

'

'

'

'

'

'

'

'

'

124.8

'

'

Outstanding balance to be fully recovered

'

'

'

'

'

'

'

'

'

'

'

153.6

111

'

Outstanding balance expected to recovered in next twelve months

'

'

'

'

'

'

'

'

'

'

'

20

'

'

Assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other non-current assets

'

96.7

'

'

'

85.6

'

'

'

96.7

85.6

'

'

'

Total insurance assets

'

'

'

'

'

'

'

'

'

96.7

85.6

'

'

'

Liabilities [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accounts payable and accrued expenses

'

41.1

'

'

'

36.5

'

'

'

41.1

36.5

'

'

'

Other non-current liabilities

'

55.6

'

'

'

49.1

'

'

'

55.6

49.1

'

'

'

Total accrued liabilities

'

'

'

'

'

'

'

'

'

$96.70

$85.60

'

'

'

Leases_and_Commitments_Details

Leases and Commitments (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Leases [Abstract]	'	'	'
Total lease rent expense	$32.10	$31.30	$30.70
Future minimum operating lease payments	'	'	'
2014	14.5	'	'
2015	12	'	'
2016	9.9	'	'
2017	8.8	'	'
2018	6.6	'	'
After 2018	3.4	'	'
Total minimum lease payments	$55.20	'	'

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)

3 Months Ended

12 Months Ended

In Millions, except Share data, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Treasury stock received from bond hedge, shares

'

'

'

'

'

'

'

'

'

13,000,000

'

Companys Weighted Average Share Price Of Bond Hedge

'

'

'

'

'

'

'

'

'

$16.41

'

Treasury stock issued due to settlement of warrant, shares

'

'

'

'

'

'

'

'

'

9,800,000

'

Investment Warrants, Exercise Price

'

'

'

'

'

'

'

'

'

$19.31

'

Basic earnings per share [Abstract]

'

'

'

'

'

'

'

'

'

'

'

Weighted average shares of common stock outstanding

'

'

'

'

'

'

'

'

228,600,000

225,304,000

218,458,000

Earnings per share — basic

$0.62

$0.73

$0.76

$0.62

$0.52

$0.44

$0.54

$0.73

$2.73

$2.22

$2.52

Diluted earnings per share [Abstract]

'

'

'

'

'

'

'

'

'

'

'

Net earnings attributable to BorgWarner Inc.

$141.40

[1]

$166.80

[1]

$174.10

[1]

$142

[1]

$121.20

[1]

$101.10

[1]

$120.60

[1]

$158

[1]

$624.30

$500.90

[1]

$550.10

Adjusted for net interest expense on convertible notes

'

'

'

'

'

'

'

'

'

5.8

21.5

Diluted net earnings attributable to BorgWarner Inc.

'

'

'

'

'

'

'

'

$624.30

$506.70

$571.60

Effect of 3.50% convertible senior notes

'

'

'

'

'

'

'

'

'

6,644,000

22,778,000

Effect of warrant

'

'

'

'

'

'

'

'

'

6,800,000

10,430,000

Effect of stock-based compensation

'

'

'

'

'

'

'

'

2,737,000

4,006,000

5,270,000

Total dilutive effect on weighted average shares of common stock outstanding

'

'

'

'

'

'

'

'

2,737,000

17,450,000

38,478,000

Weighted average shares of common stock outstanding including dilutive shares

'

'

'

'

'

'

'

'

231,337,000

242,754,000

256,936,000

Earnings per share — diluted

$0.62

$0.72

$0.75

$0.61

$0.51

$0.43

$0.50

$0.64

$2.70

[2]

$2.09

[2]

$2.22

[2]

Bond hedge [Member]

'

'

'

'

'

'

'

'

'

'

'

Diluted earnings per share [Abstract]

'

'

'

'

'

'

'

'

'

'

'

Total anti-dilutive shares

'

'

'

'

'

'

'

'

'

3,878,000

12,282,000

Convertible Senior Notes Due April 2012 [Member]

'

'

'

'

'

'

'

'

'

'

'

Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Debt instrument stated interest rate

'

'

'

'

3.50%

'

'

'

'

3.50%

'

[1]

The Company's results were impacted by the following:•Quarter ended December 31, 2013: The Company incurred restructuring expense of $52.3 million, related to the initiation of Drivetrain segment actions designed to improve future profitability and competitiveness. The Company recorded tax benefits of $7.1 million in connection with the restructuring expense. Additionally, the Company recorded a net tax benefit of $4.4 million related to the reversal of certain state deferred tax asset valuation allowances and other tax adjustments.•Quarter ended September 30, 2013: The Company incurred a net tax benefit of $5.6 million, which was comprised of tax benefits of $3.1 million related to 2012 provision to return adjustments and $2.5 million related to the reversal of certain state deferred tax asset valuation allowances.•Quarter ended March 31, 2013: The Company incurred $11.3 million of expense related to a program termination agreement. Retirement related obligations expense of $5.9 million was primarily related to a first quarter 2013 grant of restricted stock awards to certain retiring NEOs as to which the Company waived the forfeiture provisions. The Company recorded tax benefits of $3.8 million and $2.1 million related to the program termination agreement and retirement related obligations. Additionally, the Company recorded a net tax benefit of $1.7 million, which was 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, partially offset by a $4.9 million tax expense related to a comprehensive income adjustment.•Quarter ended December 31, 2012: Retirement related obligations of $17.3 million are comprised of a $5.7 million loss resulting from the settlement of a portion of the Muncie Plant's pension obligation and an $11.6 million expense associated with the retirement of certain NEOs. These obligations were partially offset by a $6.1 million tax benefit. The Company incurred tax expense of $3.9 million which included $11.1 million of U.S. tax expense to correct the income taxes payable balance, partially offset by tax benefits resulting from changes to the statutory income tax rate in certain countries and the settlement of certain tax audits. •Quarter ended September 30, 2012: The Company incurred $1.8 million of expense and $11.2 million of tax expense associated with the completion of the sale of its spark plug business. The Company also recorded restructuring expense of $27.4 million primarily associated with the disposal and future requirements of BERU's on-going business, which was partially offset by a tax benefit of $7.7 million. Additionally, the Company incurred tax expense of $6.9 million primarily resulting from the settlement of certain tax audits.•Quarter ended June 30, 2012: The Company recorded expense of $37.9 million primarily due to the write-down of prior purchase price accounting adjustments included within the disposal group as a result of signing a Master Purchase Agreement to sell the spark plug business to Federal-Mogul Corporation, which was partially offset by a tax benefit of $5.5 million resulting from the write-down. Additionally, the Company recorded tax expense of $9.0 million related to its decision to change its cash repatriation assertion for some of its foreign subsidiaries.

[2]

* The Company's diluted earnings per share for the years ended December 31, 2012 and 2011 includes the impact of the Company's 3.50% convertible senior notes and associated warrants. Refer to Note 16, "Earnings Per Share," for further information on the diluted earnings per share calculation.

Recent_Transactions_Details

Recent Transactions (Details) (USD $)	12 Months Ended				3 Months Ended		12 Months Ended		0 Months Ended	1 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Sep. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Aug. 02, 2011	Jan. 31, 2011	Jan. 31, 2011
				BERU Korea [Member]	Spark Plug Business [Member]	Spark Plug Business [Member]	Spark Plug Business [Member]	Tire pressure monitoring [Member]	Vikas Emissions Systems India Private Limited [Member]	Haldex [Member]	Swedish krona
											Haldex [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Business Acquisition, Pro Forma Revenue	$350	'	'	'	'	'	'	'	'	'	'
Ownership percentage of noncontrolling owners	'	'	'	49.00%	'	'	'	'	40.00%	'	'
Purchase of noncontrolling interest	'	15	29.4	15	'	'	'	'	'	'	'
Purchase of subsidiary shares from noncontrolling interest	'	'	'	7	'	'	'	'	2.8	'	'
Adjustments to capital in excess of par value	'	'	'	8	'	'	'	'	26.6	'	'
Ownership percentage of parent	'	'	'	100.00%	'	'	'	'	100.00%	'	'
Loss from disposal activities	'	39.7	21.5	'	1.8	37.9	'	'	'	'	'
Proceeds from sale of business	'	'	'	'	'	'	55.2	22.9	'	'	'
Business acquisition, percentage of voting interests acquired	'	'	'	'	'	'	'	'	'	100.00%	'
Consideration for acquisition, net of cash acquired	'	'	'	'	'	'	'	'	'	214.9	1,380
Payments for businesses acquired, net of cash acquired	'	'	203.7	'	'	'	'	'	'	'	'
Liabilities assumed from businesses acquired	'	'	'	'	'	'	'	'	'	5.3	'
Debt assumed from business acquired	'	'	'	'	'	'	'	'	'	$5.90	'

Reporting_Segments_and_Related2

Reporting Segments and Related Information (Details) (USD $)

3 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Customer sales

'

'

'

'

'

'

'

'

$7,436.60

$7,183.20

$7,114.70

Net sales

1,885.40

1,806.20

1,893.90

1,851.10

1,719.10

1,695.20

1,856.40

1,912.50

7,436.60

7,183.20

7,114.70

Year-end assets

6,917

'

'

'

6,400.80

'

'

'

6,917

6,400.80

5,958.60

Depreciation and amortization

'

'

'

'

'

'

'

'

299.4

288.6

283

Long-lived asset expenditures

'

'

'

'

'

'

'

'

417.8

[1]

407.4

[1]

393.7

[1]

Operating Segments [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Customer sales

'

'

'

'

'

'

'

'

7,436.60

7,183.20

7,114.70

Net sales

'

'

'

'

'

'

'

'

7,436.60

7,183.20

7,114.70

Year-end assets

5,305.70

'

'

'

4,951.40

'

'

'

5,305.70

4,951.40

4,891.80

Depreciation and amortization

'

'

'

'

'

'

'

'

279.6

269.1

268.6

Long-lived asset expenditures

'

'

'

'

'

'

'

'

400.4

[1]

395.5

[1]

380.2

[1]

Engine [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Customer sales

'

'

'

'

'

'

'

'

4,990.10

4,884.50

5,030.20

Inter-segment sales

'

'

'

'

'

'

'

'

32

28.5

20.4

Net sales

'

'

'

'

'

'

'

'

5,022.10

4,913

5,050.60

Year-end assets

3,519.10

'

'

'

3,299.20

'

'

'

3,519.10

3,299.20

3,329

Depreciation and amortization

'

'

'

'

'

'

'

'

189.1

177.8

188.6

Long-lived asset expenditures

'

'

'

'

'

'

'

'

277.5

[1]

269.9

[1]

264.3

[1]

Drivetrain [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Customer sales

'

'

'

'

'

'

'

'

2,446.50

2,298.70

2,084.50

Net sales

'

'

'

'

'

'

'

'

2,446.50

2,298.70

2,084.50

Year-end assets

1,786.60

'

'

'

1,652.20

'

'

'

1,786.60

1,652.20

1,562.80

Depreciation and amortization

'

'

'

'

'

'

'

'

90.5

91.3

80

Long-lived asset expenditures

'

'

'

'

'

'

'

'

122.9

[1]

125.6

[1]

115.9

[1]

Inter-segment eliminations [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Inter-segment sales

'

'

'

'

'

'

'

'

-32

-28.5

-20.4

Net sales

'

'

'

'

'

'

'

'

-32

-28.5

-20.4

Corporate Segment [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Year-end assets

1,611.30

[2]

'

'

'

1,449.40

[2]

'

'

'

1,611.30

[2]

1,449.40

[2]

1,066.80

[2]

Depreciation and amortization

'

'

'

'

'

'

'

'

19.8

[2]

19.5

[2]

14.4

[2]

Long-lived asset expenditures

'

'

'

'

'

'

'

'

$17.40

[1],[2]

$11.90

[1],[2]

$13.50

[1],[2]

[1]

Long-lived asset expenditures include capital expenditures and tooling outlays.

[2]

Corporate assets include investments and advances and deferred income taxes.

Reporting_Segments_and_Related3

Reporting Segments and Related Information - Adjusted EBIT (Details) (USD $)

3 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Adjusted EBIT

'

'

'

'

'

'

'

'

$1,078.20

$995.50

$935.50

Loss from disposal activities

'

'

'

'

'

'

'

'

'

39.7

21.5

Program termination agreement

'

'

'

'

'

'

'

'

11.3

'

'

Retirement related obligations

'

'

'

'

'

'

'

'

5.9

17.3

'

Patent infringement settlement, net of legal costs incurred

'

'

'

'

'

'

'

'

'

'

-29.1

Corporate, including equity in affiliates' earnings and stock-based compensation

'

'

'

'

'

'

'

'

110

115.4

107.4

Interest income

-1.5

-1.3

-1

-1

-1

-1

-1.3

-1.4

-4.8

-4.7

-4.8

Interest expense and finance charges

7.6

8.1

8.8

9.7

6.7

5

12.6

15.1

34.2

39.4

74.6

Earnings before income taxes and noncontrolling interest

'

'

'

'

'

'

'

'

869.3

761

765.9

Provision for income taxes

44.5

56.3

66.6

50.9

48.4

64.2

68.5

57.5

218.3

238.6

195.3

Net earnings

149.4

172.9

180.1

148.6

126.6

105.9

126.2

163.7

651

522.4

570.6

Net earnings attributable to the noncontrolling interest, net of tax

8

6.1

6

6.6

5.4

4.8

5.6

5.7

26.7

21.5

20.5

Net earnings attributable to BorgWarner Inc.

141.4

[1]

166.8

[1]

174.1

[1]

142

[1]

121.2

[1]

101.1

[1]

120.6

[1]

158

[1]

624.3

500.9

[1]

550.1

Restructuring expense

'

'

'

'

'

27.4

'

'

52.3

27.4

'

Engine [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Adjusted EBIT

'

'

'

'

'

'

'

'

826

786.4

774.3

Drivetrain [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Adjusted EBIT

'

'

'

'

'

'

'

'

$252.20

$209.10

$161.20

[1]

The Company's results were impacted by the following:•Quarter ended December 31, 2013: The Company incurred restructuring expense of $52.3 million, related to the initiation of Drivetrain segment actions designed to improve future profitability and competitiveness. The Company recorded tax benefits of $7.1 million in connection with the restructuring expense. Additionally, the Company recorded a net tax benefit of $4.4 million related to the reversal of certain state deferred tax asset valuation allowances and other tax adjustments.•Quarter ended September 30, 2013: The Company incurred a net tax benefit of $5.6 million, which was comprised of tax benefits of $3.1 million related to 2012 provision to return adjustments and $2.5 million related to the reversal of certain state deferred tax asset valuation allowances.•Quarter ended March 31, 2013: The Company incurred $11.3 million of expense related to a program termination agreement. Retirement related obligations expense of $5.9 million was primarily related to a first quarter 2013 grant of restricted stock awards to certain retiring NEOs as to which the Company waived the forfeiture provisions. The Company recorded tax benefits of $3.8 million and $2.1 million related to the program termination agreement and retirement related obligations. Additionally, the Company recorded a net tax benefit of $1.7 million, which was 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, partially offset by a $4.9 million tax expense related to a comprehensive income adjustment.•Quarter ended December 31, 2012: Retirement related obligations of $17.3 million are comprised of a $5.7 million loss resulting from the settlement of a portion of the Muncie Plant's pension obligation and an $11.6 million expense associated with the retirement of certain NEOs. These obligations were partially offset by a $6.1 million tax benefit. The Company incurred tax expense of $3.9 million which included $11.1 million of U.S. tax expense to correct the income taxes payable balance, partially offset by tax benefits resulting from changes to the statutory income tax rate in certain countries and the settlement of certain tax audits. •Quarter ended September 30, 2012: The Company incurred $1.8 million of expense and $11.2 million of tax expense associated with the completion of the sale of its spark plug business. The Company also recorded restructuring expense of $27.4 million primarily associated with the disposal and future requirements of BERU's on-going business, which was partially offset by a tax benefit of $7.7 million. Additionally, the Company incurred tax expense of $6.9 million primarily resulting from the settlement of certain tax audits.•Quarter ended June 30, 2012: The Company recorded expense of $37.9 million primarily due to the write-down of prior purchase price accounting adjustments included within the disposal group as a result of signing a Master Purchase Agreement to sell the spark plug business to Federal-Mogul Corporation, which was partially offset by a tax benefit of $5.5 million resulting from the write-down. Additionally, the Company recorded tax expense of $9.0 million related to its decision to change its cash repatriation assertion for some of its foreign subsidiaries.

Reporting_Segments_and_Related4

Reporting Segments and Related Information - Geographic Information (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Maximum percentage in consolidated sales of countries outside the US other than Germany France Hungary and South Korea	'	'	'	'	'	'	'	'	5.00%	'	'
Investment in NSK-Warner	$201.50	'	'	'	$217.70	'	'	'	$201.50	$217.70	'
Net sales	1,885.40	1,806.20	1,893.90	1,851.10	1,719.10	1,695.20	1,856.40	1,912.50	7,436.60	7,183.20	7,114.70
Long-lived assets	1,939.40	'	'	'	1,788	'	'	'	1,939.40	1,788	1,664.30
United States	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	1,939.70	1,857.20	1,674
Long-lived assets	531.7	'	'	'	508.1	'	'	'	531.7	508.1	492.6
Total Europe [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	3,671.70	3,670.50	3,984
Long-lived assets	798.9	'	'	'	768.2	'	'	'	798.9	768.2	735.1
Germany	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	1,760.10	1,871.30	2,200
Long-lived assets	430	'	'	'	432.2	'	'	'	430	432.2	420.4
Hungary	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	451.5	448.9	503.2
Long-lived assets	66.9	'	'	'	64.3	'	'	'	66.9	64.3	56.9
France	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	327.6	335.2	363
Long-lived assets	44.4	'	'	'	45.9	'	'	'	44.4	45.9	63.2
Other Europe [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	1,132.50	1,015.10	917.8
Long-lived assets	257.6	'	'	'	225.8	'	'	'	257.6	225.8	194.6
South Korea [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	563.5	505.6	471.7
Long-lived assets	165.2	'	'	'	140.4	'	'	'	165.2	140.4	124.5
China	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	636.3	499.1	416.6
Long-lived assets	238.5	'	'	'	184.3	'	'	'	238.5	184.3	148
Other Foreign [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	625.4	650.8	568.4
Long-lived assets	205.1	'	'	'	187	'	'	'	205.1	187	164.1
NSK Warner [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Equity investment in NSK Warner, percent	50.00%	'	'	'	'	'	'	'	50.00%	'	'
Investment in NSK-Warner	$168	'	'	'	$184.40	'	'	'	$168	$184.40	$189.20

Reporting_Segments_and_Related5

Reporting Segments and Related Information - Major Customers & Products (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue from External Customer [Line Items]	'	'	'
Percentage of net sales	10.00%	'	'
Sales Revenue, Goods, Net [Member] | Turbochargers [Member]	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Concentration Risk, Percentage	26.00%	26.00%	26.00%
Sales Revenue, Goods, Net [Member] | Volkswagen [Member]	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Concentration Risk, Percentage	16.00%	17.00%	19.00%
Sales Revenue, Goods, Net [Member] | Ford [Member]	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Concentration Risk, Percentage	14.00%	13.00%	12.00%
Accounts Receivable [Member] | Volkswagen and Ford [Member]	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Concentration Risk, Percentage	24.00%	'	'
Accounts Receivable, Net	248.4	'	'

Reporting_Segments_and_Related6

Reporting Segments and Related Information - Quarterly Information (Details) (USD $)	3 Months Ended																12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Net sales	$1,885.40		$1,806.20		$1,893.90		$1,851.10		$1,719.10		$1,695.20		$1,856.40		$1,912.50		$7,436.60		$7,183.20		$7,114.70
Cost of sales	1,478.80		1,426.60		1,497.30		1,476.40		1,374.90		1,351.50		1,473.20		1,516.70		5,879.10		5,716.30		5,704.30
Gross profit	406.6		379.6		396.6		374.7		344.2		343.7		383.2		395.8		1,557.50		1,466.90		1,410.40
Equity in affiliates’ earnings, net of tax	-12.3		-10.4		-11.1		-9.7		-10		-11.1		-12.5		-9.2		-43.5		-42.8		-38.2
Net earnings	149.4		172.9		180.1		148.6		126.6		105.9		126.2		163.7		651		522.4		570.6
Net earnings attributable to the noncontrolling interest, net of tax	8		6.1		6		6.6		5.4		4.8		5.6		5.7		26.7		21.5		20.5
Selling, general and administrative expenses	167.1		157.7		155.6		159.3		156.2		151		153.1		169		639.7		629.3		621
Net earnings attributable to BorgWarner Inc.	141.4	[1]	166.8	[1]	174.1	[1]	142	[1]	121.2	[1]	101.1	[1]	120.6	[1]	158	[1]	624.3		500.9	[1]	550.1
Interest income	-1.5		-1.3		-1		-1		-1		-1		-1.3		-1.4		-4.8		-4.7		-4.8
Interest expense and finance charges	7.6		8.1		8.8		9.7		6.7		5		12.6		15.1		34.2		39.4		74.6
Earnings per share — basic	$0.62		$0.73		$0.76		$0.62		$0.52		$0.44		$0.54		$0.73		$2.73		$2.22		$2.52
Other expense (income)	51.8		-3.7		-2.4		16.9		17.3		29.7		36.6		1.1		62.6		84.7		-8.1
Operating income	187.7		225.6		243.4		198.5		170.7		163		193.5		225.7		855.2		752.9		797.5
Earnings before income taxes and noncontrolling interest	193.9		229.2		246.7		199.5		175		170.1		194.7		221.2		869.3		761		765.9
Provision for income taxes	44.5		56.3		66.6		50.9		48.4		64.2		68.5		57.5		218.3		238.6		195.3
Earnings per share — diluted	$0.62		$0.72		$0.75		$0.61		$0.51		$0.43		$0.50		$0.64		$2.70	[2]	$2.09	[2]	$2.22	[2]
Retirement related obligations	'		'		'		'		'		'		'		'		5.9		17.3		'
Tax benefit of project termination settlement	'		'		'		'		'		'		'		'		3.8		'		'
Recognized net (gain) loss due to settlements	'		'		'		'		'		'		'		'		'		5.7		'
Executive retirement incremental compensation expense	'		'		'		'		'		'		'		'		'		11.6		'
Tax benefit associated retirement obligations	'		'		'		'		6.1		'		'		'		2.1		'		'
Other tax adjustments	'		5.6		'		1.7		3.9		6.9		'		'		11.7		19.8		6.2
Tax impact of writedown of tax accounts	'		'		'		'		'		'		'		'		'		11.1		'
Loss from disposal activities	'		'		'		'		'		'		'		'		'		39.7		21.5
Tax impact of loss on disposals	'		11.2		'		'		'		'		5.5		'		'		5.7		2.7
Restructuring expense	'		'		'		'		'		27.4		'		'		52.3		27.4		'
Tax benefit associated with restructuring	'		'		'		'		'		7.7		'		'		7.1		7.7		'
Impact of change in repatriation assertion	'		'		'		'		'		'		9		'		'		7.5		'
Patent infringement settlement, net of legal costs incurred	'		'		'		'		'		'		'		'		'		'		29.1
Tax impact of patent infringement settlement	'		'		'		'		'		'		'		'		'		'		11
2012 return to provision and other adjustments	'		3.1		'		'		'		'		'		'		-2.2		'		'
Reversal of certain state valuation allowances	4.4		2.5		'		'		'		'		'		'		8		'		'
Program termination agreement	'		'		'		'		'		'		'		'		11.3		'		'
Tax benefit of research and development and international tax credit extensions	'		'		'		6.6		'		'		'		'		6.7		'		'
Tax impact of other tax adjustments	'		'		'		4.9		'		'		'		'		5.2		'		'
Spark Plug Business [Member]	'		'		'		'		'		'		'		'		'		'		'
Loss from disposal activities	'		$1.80		'		'		'		'		$37.90		'		'		'		'
[1]	The Company's results were impacted by the following:•Quarter ended December 31, 2013: The Company incurred restructuring expense of $52.3 million, related to the initiation of Drivetrain segment actions designed to improve future profitability and competitiveness. The Company recorded tax benefits of $7.1 million in connection with the restructuring expense. Additionally, the Company recorded a net tax benefit of $4.4 million related to the reversal of certain state deferred tax asset valuation allowances and other tax adjustments.•Quarter ended September 30, 2013: The Company incurred a net tax benefit of $5.6 million, which was comprised of tax benefits of $3.1 million related to 2012 provision to return adjustments and $2.5 million related to the reversal of certain state deferred tax asset valuation allowances.•Quarter ended March 31, 2013: The Company incurred $11.3 million of expense related to a program termination agreement. Retirement related obligations expense of $5.9 million was primarily related to a first quarter 2013 grant of restricted stock awards to certain retiring NEOs as to which the Company waived the forfeiture provisions. The Company recorded tax benefits of $3.8 million and $2.1 million related to the program termination agreement and retirement related obligations. Additionally, the Company recorded a net tax benefit of $1.7 million, which was 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, partially offset by a $4.9 million tax expense related to a comprehensive income adjustment.•Quarter ended December 31, 2012: Retirement related obligations of $17.3 million are comprised of a $5.7 million loss resulting from the settlement of a portion of the Muncie Plant's pension obligation and an $11.6 million expense associated with the retirement of certain NEOs. These obligations were partially offset by a $6.1 million tax benefit. The Company incurred tax expense of $3.9 million which included $11.1 million of U.S. tax expense to correct the income taxes payable balance, partially offset by tax benefits resulting from changes to the statutory income tax rate in certain countries and the settlement of certain tax audits. •Quarter ended September 30, 2012: The Company incurred $1.8 million of expense and $11.2 million of tax expense associated with the completion of the sale of its spark plug business. The Company also recorded restructuring expense of $27.4 million primarily associated with the disposal and future requirements of BERU's on-going business, which was partially offset by a tax benefit of $7.7 million. Additionally, the Company incurred tax expense of $6.9 million primarily resulting from the settlement of certain tax audits.•Quarter ended June 30, 2012: The Company recorded expense of $37.9 million primarily due to the write-down of prior purchase price accounting adjustments included within the disposal group as a result of signing a Master Purchase Agreement to sell the spark plug business to Federal-Mogul Corporation, which was partially offset by a tax benefit of $5.5 million resulting from the write-down. Additionally, the Company recorded tax expense of $9.0 million related to its decision to change its cash repatriation assertion for some of its foreign subsidiaries.
[2]	* The Company's diluted earnings per share for the years ended December 31, 2012 and 2011 includes the impact of the Company's 3.50% convertible senior notes and associated warrants. Refer to Note 16, "Earnings Per Share," for further information on the diluted earnings per share calculation.