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EQUITY - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | Dec. 31, 2020 | Oct. 31, 2020 | Oct. 27, 2020
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Equity [Abstract] |  |  |
New common stock issued (in shares) | 83.3 | 83.3 | 83.3
Shares reserved for future issuance (in shares) | 9.3 |  | 4.4
Warrants exercisable |  |  | 5.00%
Warrant exercise price (in dollars per share) |  |  | $ 36
Expected term (in years) |  |  | 4 years
Pension and post-retirement adjustments |  | $ 23 |
Outstanding common stock | 1.00% |  |

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