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Stockholder's Equity (Tables) | 3 Months Ended
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Mar. 31, 2019
Statement of Financial Position [Abstract] |
Schedule of Stockholders Equity [Table Text Block] |
| BorgWarner Inc. stockholder's equity |  |
(in millions of dollars) | Issued common stock |  | Capital in excess of par value |  | Treasury stock |  | Retained earnings |  | Accumulated other comprehensive income (loss) |  | Noncontrolling interests
Balance, December 31, 2018 | $ | 3 |  |  | $ | 1,146 |  |  | $ | (1,585 | ) |  | $ | 5,336 |  |  | $ | (674 | ) |  | $ | 119 |
Dividends declared ($0.17 per share) * | — |  |  | — |  |  | — |  |  | (35 | ) |  | — |  |  | (20 | )
Net issuance for executive stock plan | — |  |  | (10 | ) |  | 7 |  |  | — |  |  | — |  |  | — |
Net issuance of restricted stock | — |  |  | (25 | ) |  | 21 |  |  | — |  |  | — |  |  | — |
Purchase of treasury stock | — |  |  | — |  |  | (69 | ) |  | — |  |  | — |  |  | — |
Net earnings | — |  |  | — |  |  | — |  |  | 160 |  |  | — |  |  | 11 |
Other comprehensive loss | — |  |  | — |  |  | — |  |  | — |  |  | (1 | ) |  | 1 |
Balance, March 31, 2019 | $ | 3 |  |  | $ | 1,111 |  |  | $ | (1,626 | ) |  | $ | 5,461 |  |  | $ | (675 | ) |  | $ | 111 |
| BorgWarner Inc. stockholder's equity |  |
(in millions of dollars) | Issued common stock |  | Capital in excess of par value |  | Treasury stock |  | Retained earnings |  | Accumulated other comprehensive income (loss) |  | Noncontrolling interests
Balance, December 31, 2017 | $ | 3 |  |  | $ | 1,118 |  |  | $ | (1,445 | ) |  | $ | 4,531 |  |  | $ | (490 | ) |  | $ | 109 |
Dividends declared ($0.17 per share) * | — |  |  | — |  |  | — |  |  | (36 | ) |  | — |  |  | (18 | )
Net issuance for executive stock plan | — |  |  | (1 | ) |  | 4 |  |  | — |  |  | — |  |  | — |
Net issuance of restricted stock | — |  |  | (15 | ) |  | 12 |  |  | — |  |  | — |  |  | — |
Purchase of treasury stock | — |  |  | — |  |  | (57 | ) |  | — |  |  | — |  |  | — |
Adoption of accounting standards | — |  |  | — |  |  | — |  |  | 16 |  |  | (14 | ) |  | — |
Net earnings | — |  |  | — |  |  | — |  |  | 225 |  |  | — |  |  | 12 |
Other comprehensive income (loss) | — |  |  | — |  |  | — |  |  | — |  |  | 60 |  |  | 2 |
Balance, March 31, 2018 | $ | 3 |  |  | $ | 1,102 |  |  | $ | (1,486 | ) |  | $ | 4,736 |  |  | $ | (444 | ) |  | $ | 105 |
____________________________________ * The dividends declared relate to BorgWarner common stock.

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
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