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DISCONTINUED OPERATIONS Schedule of Disposal Groups, including Discontinued Operations, Income Statement, Balance Sheet and Cash Flows (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
INCOME FROM DISCONTINUED OPERATIONS, net of tax | $ 88.2 | $ 2.5 | $ 76.7 |
Current assets of discontinued operations | 12.4 | 118.5 |  | $ 118.5
Non-current assets of discontinued operations | 0.0 | 20.3 |  | 20.3
Current liabilities of discontinued operations | 6.7 | 75.0 |  | 75.0
Non-current liabilities of discontinued operations | 8.3 | 52.2 |  | $ 52.2
Net cash provided (used) by operating activities | 478.5 | 338.1 | 303.0 |
Net cash provided (used) by investing activities | (273.1) | (156.0) | (57.9) |
Asia Pacific Iron Ore [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
INCOME FROM DISCONTINUED OPERATIONS, net of tax | 118.3 | 21.2 | 96.6 |
Current assets of discontinued operations | 12.4 | 118.5 |  |
Non-current assets of discontinued operations | 0.0 | 20.3 |  |
Current liabilities of discontinued operations | 3.8 | 71.8 |  |
Non-current liabilities of discontinued operations | 8.3 | 52.2 |  |
North American Coal [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
INCOME FROM DISCONTINUED OPERATIONS, net of tax | (3.6) | 2.6 | (2.4) |
Current assets of discontinued operations | 0.0 | 0.0 |  |
Non-current assets of discontinued operations | 0.0 | 0.0 |  |
Current liabilities of discontinued operations | 2.9 | 3.2 |  |
Non-current liabilities of discontinued operations | 0.0 | 0.0 |  |
Canadian Entities [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
INCOME FROM DISCONTINUED OPERATIONS, net of tax | (26.5) | (21.3) | (17.5) |
Discontinued Operations [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net cash provided (used) by operating activities | (95.9) | 79.6 | 99.8 |
Net cash provided (used) by investing activities | 19.8 | (8.4) | 10.0 |
Discontinued Operations [Member] | Asia Pacific Iron Ore [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net cash provided (used) by operating activities | (81.3) | 79.6 | 99.8 |
Net cash provided (used) by investing activities | 19.8 | (2.8) | (0.4) |
Discontinued Operations [Member] | North American Coal [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net cash provided (used) by investing activities | 0.0 | 2.1 | 3.6 |
Discontinued Operations [Member] | Canadian Entities [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net cash provided (used) by operating activities | (14.6) | 0.0 | 0.0 |
Net cash provided (used) by investing activities | $ 0.0 | $ (7.7) | $ 6.8 |

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