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REPORTING SEGMENTS AND RELATED INFORMATION - Earnings before interest and income taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Segment Reporting Information |  |  |  |
Segment Adjusted Operating Income | $ 410 | $ 499 | $ 862 | $ 1,032
Corporate, including stock-based compensation | 62 | 78 | 125 | 147
Intangible asset amortization expense | 27 | 20 | 50 | 40
Restructuring expense | 27 | 62 | 42 | 92
Merger, acquisition and divestiture expense, net | 9 | 15 | 32 | 28
Other non-comparable items | 13 | 0 | 13 | (2)
Loss (gain) on sale of business | 0 | 7 | (24) | 7
Equity in affiliates’ earnings, net of tax | (11) | (16) | (19) | (28)
Unrealized (gain) loss on equity securities | (11) | 4 | 28 | 276
Interest expense, net | 15 | 39 | 30 | 57
Other postretirement income | (9) | (12) | (18) | (23)
Earnings before income taxes and noncontrolling interest | 288 | 302 | 603 | 438
Provision for income taxes | 57 | 28 | 148 | 70
Net earnings | 231 | 274 | 455 | 368
Net earnings attributable to noncontrolling interest, net of tax | 15 | 27 | 39 | 56
Net earnings attributable to BorgWarner Inc. | 216 | 247 | 416 | 312
Air Management |  |  |  |
Segment Reporting Information |  |  |  |
Segment Adjusted Operating Income | 235 | 263 | 478 | 569
e-Propulsion & Drivetrain |  |  |  |
Segment Reporting Information |  |  |  |
Segment Adjusted Operating Income | 80 | 132 | 184 | 266
Restructuring expense |  |  | 14 |
Fuel Systems |  |  |  |
Segment Reporting Information |  |  |  |
Segment Adjusted Operating Income | 44 | 60 | 110 | 117
Aftermarket |  |  |  |
Segment Reporting Information |  |  |  |
Segment Adjusted Operating Income | $ 51 | $ 44 | $ 90 | $ 80

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