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REPORTING SEGMENTS AND RELATED INFORMATION - Adjusted Operating Income (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting Information [Line Items] |  |  |
Adjusted Operating Income | $ 1,892 | $ 1,921 | $ 1,233
Corporate, including stock-based compensation | 289 | 302 | 192
Intangible asset amortization expense | 97 | 88 | 89
Restructuring expense | 59 | 163 | 203
Merger, acquisition and divestiture expense, net | 40 | 50 | 96
Asset impairments and lease modifications | 30 | 17 | 17
(Gain) loss on sales of businesses | (13) | 29 | 0
Other non-comparable items | 16 | (3) | (9)
Customer warranty settlement | 0 | 124 | 0
Amortization of inventory fair value adjustment | 0 | 0 | 27
Equity in affiliates’ earnings, net of tax | (38) | (48) | (18)
Unrealized loss (gain) on debt and equity securities | (73) | (362) | 382
Interest expense, net | 52 | 93 | 61
Other postretirement income | (31) | (45) | (7)
Earnings before income taxes and noncontrolling interest | 1,318 | 789 | 964
Provision for income taxes | 292 | 150 | 397
Net earnings | 1,026 | 639 | 567
Net earnings attributable to the noncontrolling interest, net of tax | 82 | 102 | 67
Net earnings attributable to BorgWarner Inc. | 944 | 537 | 500
Air Management |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted Operating Income | 1,068 | 1,064 | 762
e-Propulsion & Drivetrain |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted Operating Income | 379 | 458 | 368
(Gain) loss on sales of businesses |  | 7 |
Fuel Systems |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted Operating Income | 249 | 235 | 49
Aftermarket |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted Operating Income | $ 196 | $ 164 | $ 54

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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