XML 65 R40.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Abstract] |
Schedule of accumulated other comprehensive income (loss) |
(in millions) |  | Foreign currency translation adjustments |  | Hedge instruments |  | Defined benefit postretirement plans |  | Other |  | Total
Beginning balance, March 31, 2018 |  | $ | (228.8 | ) |  | $ | (4.6 | ) |  | $ | (199.6 | ) |  | $ | 2.7 |  |  | $ | (430.3 | )
Comprehensive income (loss) before reclassifications |  | (148.4 | ) |  | (0.4 | ) |  | 6.4 |  |  | — |  |  | (142.4 | )
Income taxes associated with comprehensive income (loss) before reclassifications |  | 2.9 |  |  | — |  |  | (1.4 | ) |  | — |  |  | 1.5 |
Reclassification from accumulated other comprehensive loss |  | — |  |  | 2.5 |  |  | 2.0 |  |  | — |  |  | 4.5 |
Income taxes reclassified into net earnings |  | — |  |  | (0.5 | ) |  | (0.4 | ) |  | — |  |  | (0.9 | )
Ending balance, June 30, 2018 |  | $ | (374.3 | ) |  | $ | (3.0 | ) |  | $ | (193.0 | ) |  | $ | 2.7 |  |  | $ | (567.6 | )
(in millions) |  | Foreign currency translation adjustments |  | Hedge instruments |  | Defined benefit postretirement plans |  | Other |  | Total
Beginning balance, March 31, 2017 |  | $ | (481.3 | ) |  | $ | 3.8 |  |  | $ | (198.0 | ) |  | $ | 1.3 |  |  | $ | (674.2 | )
Comprehensive income (loss) before reclassifications |  | 73.4 |  |  | (1.4 | ) |  | (8.7 | ) |  | 1.2 |  |  | 64.5 |
Income taxes associated with comprehensive income (loss) before reclassifications |  | — |  |  | (0.3 | ) |  | 2.7 |  |  | — |  |  | 2.4 |
Reclassification from accumulated other comprehensive loss |  | — |  |  | (1.5 | ) |  | 2.0 |  |  | — |  |  | 0.5 |
Income taxes reclassified into net earnings |  | — |  |  | 0.9 |  |  | (0.5 | ) |  | — |  |  | 0.4 |
Ending balance, June 30, 2017 |  | $ | (407.9 | ) |  | $ | 1.5 |  |  | $ | (202.5 | ) |  | $ | 2.5 |  |  | $ | (606.4 | )
(in millions) |  | Foreign currency translation adjustments |  | Hedge instruments |  | Defined benefit postretirement plans |  | Other |  | Total
Beginning balance, December 31, 2017 |  | $ | (293.8 | ) |  | $ | (1.3 | ) |  | $ | (197.6 | ) |  | $ | 2.7 |  |  | $ | (490.0 | )
Comprehensive income (loss) before reclassifications |  | (86.7 | ) |  | (5.9 | ) |  | 2.1 |  |  | — |  |  | (90.5 | )
Income taxes associated with comprehensive income (loss) before reclassifications |  | 6.2 |  |  | 1.3 |  |  | (0.3 | ) |  | — |  |  | 7.2 |
Reclassification from accumulated other comprehensive loss |  | — |  |  | 3.7 |  |  | 3.9 |  |  | — |  |  | 7.6 |
Income taxes reclassified into net earnings |  | — |  |  | (0.8 | ) |  | (1.1 | ) |  | — |  |  | (1.9 | )
Ending balance, June 30, 2018 |  | $ | (374.3 | ) |  | $ | (3.0 | ) |  | $ | (193.0 | ) |  | $ | 2.7 |  |  | $ | (567.6 | )
(in millions) |  | Foreign currency translation adjustments |  | Hedge instruments |  | Defined benefit postretirement plans |  | Other |  | Total
Beginning balance, December 31, 2016 |  | $ | (530.3 | ) |  | $ | 5.0 |  |  | $ | (198.1 | ) |  | $ | 1.3 |  |  | $ | (722.1 | )
Comprehensive income (loss) before reclassifications |  | 122.4 |  |  | (0.9 | ) |  | (11.0 | ) |  | 1.2 |  |  | 111.7 |
Income taxes associated with comprehensive income (loss) before reclassifications |  | — |  |  | (0.5 | ) |  | 3.7 |  |  | — |  |  | 3.2 |
Reclassification from accumulated other comprehensive loss |  | — |  |  | (3.6 | ) |  | 4.1 |  |  | — |  |  | 0.5 |
Income taxes reclassified into net earnings |  | — |  |  | 1.5 |  |  | (1.2 | ) |  | — |  |  | 0.3 |
Ending balance, June 30, 2017 |  | $ | (407.9 | ) |  | $ | 1.5 |  |  | $ | (202.5 | ) |  | $ | 2.5 |  |  | $ | (606.4 | )

X
- Definition Accumulated Other Comprehensive Income (Loss) [Abstract] + References No definition available. + Details
Name: | bwa_AccumulatedOtherComprehensiveIncomeLossAbstract
Namespace Prefix: | bwa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration