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FAIR VALUE MEASUREMENTS (Tables) | 3 Months Ended
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Mar. 31, 2021
Fair Value Disclosures [Abstract] |
Schedule Of Carrying Value And Fair Value Of Financial Instruments | A summary of the carrying value and fair value of other financial instruments were as follows:
|  |  | (In Millions)
|  |  | March 31, 2021 |  | December 31, 2020
| Classification |  | Carrying Value |  | Fair Value |  | Carrying Value |  | Fair Value
Senior Notes | Level 1 |  | $ | 3,957 |  |  | $ | 4,674 |  |  | $ | 3,802 |  |  | $ | 4,446 |
IRBs due 2024 to 2028 | Level 1 |  | 94 |  |  | 94 |  |  | 94 |  |  | 91 |
EDC Revolving Facilities - outstanding balance | Level 2 |  | 53 |  |  | 53 |  |  | 18 |  |  | 18 |
ABL Facility - outstanding balance | Level 2 |  | 1,630 |  |  | 1,630 |  |  | 1,510 |  |  | 1,510 |
Total long-term debt |  |  | $ | 5,734 |  |  | $ | 6,451 |  |  | $ | 5,424 |  |  | $ | 6,065 |

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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