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ACCUMULATED OTHERCOMPREHENSIVE INCOME (LOSS) (Tables) | 12 Months Ended
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Dec. 31, 2022
Equity [Abstract] |
Components of Accumulated Other Comprehensive Income (Loss) | The components of Accumulated other comprehensive income within Cliffs shareholders’ equity and related tax effects allocated to each are shown below:
| December 31,
(In millions) | 2022 |  | 2021 |  | 2020
Foreign Currency Translation |  |  |  |  |
Beginning balance | $ | 1 |  |  | $ | 3 |  |  | $ | — |
Other comprehensive income (loss) before reclassifications | (2) |  |  | (2) |  |  | 3 |
Ending balance | $ | (1) |  |  | $ | 1 |  |  | $ | 3 |
Derivative Instruments |  |  |  |  |
Beginning balance | $ | 68 |  |  | $ | (1) |  |  | $ | (3) |
Other comprehensive income (loss) before reclassifications | 146 |  |  | 151 |  |  | (7) |
Income tax | (33) |  |  | (34) |  |  | 1 |
Other comprehensive income (loss) before reclassifications, net of tax | 113 |  |  | 117 |  |  | (6) |
Losses (gains) reclassified from AOCI to net income 1 | (256) |  |  | (61) |  |  | 10 |
Income tax expense (benefit)2 | 59 |  |  | 13 |  |  | (2) |
Net losses (gains) reclassified from AOCI to net income | (197) |  |  | (48) |  |  | 8 |
Ending balance | $ | (16) |  |  | $ | 68 |  |  | $ | (1) |
Pension and OPEB |  |  |  |  |
Beginning balance | $ | 549 |  |  | $ | (135) |  |  | $ | (316) |
Other comprehensive income before reclassifications 4 | 1,759 |  |  | 878 |  |  | 210 |
Income tax | (434) |  |  | (203) |  |  | (47) |
Other comprehensive income before reclassifications, net of tax | 1,325 |  |  | 675 |  |  | 163 |
Losses (gains) reclassified from AOCI to net income 3 | (36) |  |  | 12 |  |  | 23 |
Income tax expense (benefit)2 | 9 |  |  | (3) |  |  | (5) |
Net losses (gains) reclassified from AOCI to net income | (27) |  |  | 9 |  |  | 18 |
Ending balance | $ | 1,847 |  |  | $ | 549 |  |  | $ | (135) |
Total AOCI Ending Balance | $ | 1,830 |  |  | $ | 618 |  |  | $ | (133) |
1 Amounts recognized in Cost of goods sold in the Statements of Consolidated Operations.
2 Amounts recognized in Income tax benefit (expense) in the Statements of Consolidated Operations.
3 Amounts recognized in Net periodic benefit credits other than service cost component in the Statements of Consolidated Operations.
4 Refer to NOTE 9 - PENSIONS AND OTHER POSTRETIREMENT BENEFITS for further information.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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