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RESTRUCTURING - Reserve by type of cost (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Restructuring Cost and Reserve [Line Items] |  |
Restructuring expense, net of cash paid | $ 30 | $ 15
Air Management |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring expense, net of cash paid | 17 | 13
Fuel Injection |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring expense, net of cash paid | 3 | 0
e-Propulsion & Drivetrain |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring expense, net of cash paid | 10 | 2
Employee termination benefits |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring expense, net of cash paid | 21 | 12
Employee termination benefits | Air Management |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring expense, net of cash paid | 14 | 11
Employee termination benefits | Fuel Injection |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring expense, net of cash paid | 3 | 0
Employee termination benefits | e-Propulsion & Drivetrain |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring expense, net of cash paid | 4 | 1
Other |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring expense, net of cash paid | 9 | 3
Other | Air Management |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring expense, net of cash paid | 3 | 2
Other | Fuel Injection |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring expense, net of cash paid | 0 | 0
Other | e-Propulsion & Drivetrain |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring expense, net of cash paid | $ 6 | $ 1

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- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + 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 http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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