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PENSION AND POSTRETIREMENT BENEFIT PLANS - Plan Assets (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Oct. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Asset Class: |  |  |  |
Cash equivalents | $ 6 |  | $ 0 |
Level 1 |  |  |  |
Asset Class: |  |  |  |
Cash equivalents | 6 |  | 0 |
Level 2 |  |  |  |
Asset Class: |  |  |  |
Cash equivalents | 0 |  | 0 |
Level 3 |  |  |  |
Asset Class: |  |  |  |
Cash equivalents | $ 0 |  | 0 |
Equity Securities |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Target allocation of plan assets | 65.00% |  |  |
Debt Securities |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Target allocation of plan assets | 35.00% |  |  |
Pension Benefits |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | $ 32 | $ 26 | 27 | $ 42
Pension Benefits | Pension Plan Assets - Gross |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 32 |  | 27 |
Pension Benefits | Pension Plan Assets - Gross | Level 1 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 19 |  | 11 |
Pension Benefits | Pension Plan Assets - Gross | Level 2 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 7 |  | 9 |
Pension Benefits | Pension Plan Assets - Gross | Level 3 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 6 |  | 7 |
Pension Benefits | Fixed income |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 2 |  | 3 |
Pension Benefits | Fixed income | Level 1 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | Fixed income | Level 2 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 2 |  | 3 |
Pension Benefits | Fixed income | Level 3 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | U.S. equity |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 3 |  | 4 |
Pension Benefits | U.S. equity | Level 1 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | U.S. equity | Level 2 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 3 |  | 4 |
Pension Benefits | U.S. equity | Level 3 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | International equity |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 2 |  | 2 |
Pension Benefits | International equity | Level 1 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | International equity | Level 2 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 2 |  | 2 |
Pension Benefits | International equity | Level 3 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | Bond funds |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 5 |  | 5 |
Pension Benefits | Bond funds | Level 1 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 5 |  | 5 |
Pension Benefits | Bond funds | Level 2 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | Bond funds | Level 3 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | Blend funds |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 2 |
Pension Benefits | Blend funds | Level 1 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 2 |
Pension Benefits | Blend funds | Level 2 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | Blend funds | Level 3 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | Value funds |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 2 |  | 2 |
Pension Benefits | Value funds | Level 1 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 2 |  | 2 |
Pension Benefits | Value funds | Level 2 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | Value funds | Level 3 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | Growth funds |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 6 |  | 2 |
Pension Benefits | Growth funds | Level 1 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 6 |  | 2 |
Pension Benefits | Growth funds | Level 2 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | Growth funds | Level 3 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | Guaranteed deposit account |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 6 |  | 7 |
Pension Benefits | Guaranteed deposit account | Level 1 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | Guaranteed deposit account | Level 2 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | 0 |  | 0 |
Pension Benefits | Guaranteed deposit account | Level 3 |  |  |  |
Asset Class: |  |  |  |
Fair value of plan assets | $ 6 |  | $ 7 |

X
- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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