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GOODWILL AND OTHER INTANGIBLES - Goodwill (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Goodwill [Roll Forward] |  |
Gross goodwill balance, December 31, 2020 | $ 3,129 |
Accumulated impairment losses, December 31, 2020 |  | $ (502)
Net goodwill balance, December 31, 2020 | 2,596 | 2,627
Measurement period adjustments | 1 |
Other, primarily translation adjustment | (32) |
Ending balance, March 31, 2021 | 2,596 |
Air Management |  |
Goodwill [Roll Forward] |  |
Gross goodwill balance, December 31, 2020 | 1,517 |
Accumulated impairment losses, December 31, 2020 |  | (502)
Net goodwill balance, December 31, 2020 | 998 | 1,015
Measurement period adjustments | (4) |
Other, primarily translation adjustment | (13) |
Ending balance, March 31, 2021 | 998 |
e-Propulsion & Drivetrain |  |
Goodwill [Roll Forward] |  |
Gross goodwill balance, December 31, 2020 | 1,313 |
Accumulated impairment losses, December 31, 2020 |  | 0
Net goodwill balance, December 31, 2020 | 1,310 | 1,313
Measurement period adjustments | 9 |
Other, primarily translation adjustment | (12) |
Ending balance, March 31, 2021 | 1,310 |
Aftermarket |  |
Goodwill [Roll Forward] |  |
Gross goodwill balance, December 31, 2020 | 299 |
Accumulated impairment losses, December 31, 2020 |  | 0
Net goodwill balance, December 31, 2020 | 288 | $ 299
Measurement period adjustments | (4) |
Other, primarily translation adjustment | (7) |
Ending balance, March 31, 2021 | $ 288 |

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- 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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