XML 85 R63.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Goodwill and Other Intangibles - Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Changes in the carrying amount of goodwill |  |  |  |  |
Net goodwill balance, January 1 |  | $ 1,702.2 |  |  |
Held for sale |  | 7.3 |  |  |
Ending balance, December 31 |  | $ 1,881.8 |  | $ 1,702.2 |
Goodwill impairment test, weighted average cost of capital discount rate for future cash flow |  | 10.40% |  |  |
Sensitivity analysis Increase in discount rate |  | 1.00% |  |  |
Sensitivity analysis decrease in operating margin assumption |  | 1.00% |  |  |
Sensitivity analysis decrease in revenue growth rate |  | 1.00% |  |  |
Engine [Member] |  |  |  |  |
Changes in the carrying amount of goodwill |  |  |  |  |
Gross goodwill balance, January 1 |  | $ 1,324.0 |  | 1,338.2 |
Accumulated impairment losses, January 1 |  |  |  | (501.8) | $ (501.8)
Net goodwill balance, January 1 |  | 822.2 |  | 836.4 |
Acquisitions |  | 0.0 |  | 0.0 |
Held for sale |  | (7.3) |  | 0.0 |
Translation adjustment and other |  | 42.9 |  | (14.2) |
Ending balance, December 31 |  | 857.8 |  | 822.2 |
Drivetrain [Member] |  |  |  |  |
Changes in the carrying amount of goodwill |  |  |  |  |
Gross goodwill balance, January 1 |  | 880.2 |  | 921.5 |
Accumulated impairment losses, January 1 |  |  |  | (0.2) | $ (0.2)
Net goodwill balance, January 1 |  | 880.0 |  | 921.3 |
Acquisitions |  | 125.8 | [1] | (12.1) |
Held for sale |  | 0.0 |  | 0.0 |
Divestitures | [2] |  |  | (24.2) |
Translation adjustment and other |  | 18.2 |  | (5.0) |
Ending balance, December 31 |  | $ 1,024.0 |  | $ 880.0 |
[1] | *Acquisitions during 2017 relate to the Company's 2017 purchase of Sevcon. Acquisitions during 2016 were related to the Company's fair value adjustments for the 2015 Remy acquisition, based on new information obtained during the measurement period.
[2] | ** Divestitures relate to the Company's 2016 disposition of Remy light vehicle aftermarket business and Divgi-Warner Private Limited.

X
- Definition Discount Rate for Weighted Average Cost of Capital. + References No definition available. + Details
Name: | bwa_GoodwillImpairmentTestWeightedAverageCostOfCapitalDiscountRateForFutureCashFlow
Namespace Prefix: | bwa_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sensitivity Analysis decrease in operating margin assumption + References No definition available. + Details
Name: | bwa_SensitivityAnalysisDecreaseInOperatingMarginAssumption
Namespace Prefix: | bwa_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sensitivity Analysis Increase In Discount Rate + References No definition available. + Details
Name: | bwa_SensitivityAnalysisIncreaseInDiscountRate
Namespace Prefix: | bwa_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sensitivity analysis in revenue growth rate assumption used in the goodwill impairment test. + References No definition available. + Details
Name: | bwa_Sensitivityanalysisdecreaseinrevenuegrowthrate
Namespace Prefix: | bwa_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount classified as goodwill attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721533-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2473-110228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2941-110230 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e1107-107759 + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwillCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillForeignCurrencyTranslationGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a,h) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a,h) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase (decrease), classified as other, of an asset representing the future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillOtherIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_GoodwillRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=bwa_EngineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=bwa_DrivetrainMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |