SUPPLEMENTARY GUARANTOR INFORMATION (Supplementary Statements of Condensed Consolidating Operations and Comprehensive Income (Loss) (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
Revenues from product sales and services | $ 534.1 | $ 555.6 | $ 743.2 | $ 157.0 | $ 696.3 | $ 741.8 | $ 714.3 | $ 180.0 | $ 1,989.9 | $ 2,332.4 | $ 1,866.0 |
Cost of goods sold and operating expenses | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (1,414.2) | (1,522.8) | (1,398.4) |
Sales margin | $ 126.9 | $ 154.9 | $ 263.0 | $ 30.9 | $ 202.0 | $ 261.6 | $ 284.5 | $ 61.5 | 575.7 | 809.6 | 467.6 |
Other operating income (expense): | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Selling, general and administrative expenses | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (119.4) | (113.5) | (102.9) |
Miscellaneous - net | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (27.0) | (22.9) | 25.5 |
Total other operating expense | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (146.4) | (136.4) | (77.4) |
Operating income (loss) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 429.3 | 673.2 | 390.2 |
Other income (expense): | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Interest income (expense), net | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (101.2) | (118.9) | (126.8) |
Loss on extinguishment of debt | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (18.2) | (6.8) | (165.4) |
Other non-operating income | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 2.2 | 17.2 | 10.2 |
Total other expense | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (117.2) | (108.5) | (282.0) |
Income (loss) from continuing operations before income taxes | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 312.1 | 564.7 | 108.2 |
Income tax benefit (expense) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (17.6) | 475.2 | 252.4 |
Equity in income of subsidiaries | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Income from continuing operations | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 294.5 | 1,039.9 | 360.6 |
Income (loss) from discontinued operations, net of tax | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (1.7) | 88.2 | 2.5 |
Net income | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 292.8 | 1,128.1 | 363.1 |
Net Income (Loss) Attributable to Noncontrolling Interest | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | (3.9) |
Net income attributable to Cliffs shareholders | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 292.8 | 1,128.1 | 367.0 |
Other comprehensive income (loss) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (34.9) | (244.9) | (4.0) |
Total comprehensive income (loss) attributable to Cliffs shareholders | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 257.9 | 883.2 | 363.0 |
Consolidation, Eliminations [Member] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Revenues from product sales and services | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Cost of goods sold and operating expenses | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Sales margin | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Other operating income (expense): | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Selling, general and administrative expenses | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Miscellaneous - net | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Total other operating expense | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Operating income (loss) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Other income (expense): | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Interest income (expense), net | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Loss on extinguishment of debt | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Other non-operating income | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Total other expense | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Income (loss) from continuing operations before income taxes | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Income tax benefit (expense) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Equity in income of subsidiaries | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (549.9) | (883.7) | (524.4) |
Income from continuing operations | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (549.9) | (883.7) | (524.4) |
Income (loss) from discontinued operations, net of tax | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Net income | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (524.4) |
Net Income (Loss) Attributable to Noncontrolling Interest | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 |
Net income attributable to Cliffs shareholders | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (549.9) | (883.7) | (524.4) |
Other comprehensive income (loss) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 18.9 | 280.8 | (8.1) |
Total comprehensive income (loss) attributable to Cliffs shareholders | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (531.0) | (602.9) | (532.5) |
Parent [Member] | Reportable Legal Entities [Member] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Revenues from product sales and services | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Cost of goods sold and operating expenses | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Sales margin | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Other operating income (expense): | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Selling, general and administrative expenses | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (100.7) | (86.1) | (77.2) |
Miscellaneous - net | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.1 | (0.3) | (2.3) |
Total other operating expense | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (100.6) | (86.4) | (79.5) |
Operating income (loss) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (100.6) | (86.4) | (79.5) |
Other income (expense): | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Interest income (expense), net | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (99.4) | (117.6) | (126.8) |
Loss on extinguishment of debt | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (18.2) | (6.8) | (165.4) |
Other non-operating income | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (4.0) | (3.5) | (4.0) |
Total other expense | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (121.6) | (127.9) | (296.2) |
Income (loss) from continuing operations before income taxes | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (222.2) | (214.3) | (375.7) |
Income tax benefit (expense) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (17.0) | 474.7 | 251.4 |
Equity in income of subsidiaries | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 531.6 | 858.2 | 512.6 |
Income from continuing operations | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 292.4 | 1,118.6 | 388.3 |
Income (loss) from discontinued operations, net of tax | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.4 | 9.5 | (21.3) |
Net income | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 367.0 |
Net Income (Loss) Attributable to Noncontrolling Interest | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 |
Net income attributable to Cliffs shareholders | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 292.8 | 1,128.1 | 367.0 |
Other comprehensive income (loss) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (34.9) | (244.9) | (4.0) |
Total comprehensive income (loss) attributable to Cliffs shareholders | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 257.9 | 883.2 | 363.0 |
Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Revenues from product sales and services | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 1,989.9 | 2,332.4 | 1,866.0 |
Cost of goods sold and operating expenses | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (1,414.2) | (1,522.8) | (1,398.4) |
Sales margin | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 575.7 | 809.6 | 467.6 |
Other operating income (expense): | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Selling, general and administrative expenses | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (18.3) | (27.1) | (19.9) |
Miscellaneous - net | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (26.0) | (26.9) | 11.0 |
Total other operating expense | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (44.3) | (54.0) | (8.9) |
Operating income (loss) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 531.4 | 755.6 | 458.7 |
Other income (expense): | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Interest income (expense), net | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (2.3) | (2.1) | (1.0) |
Loss on extinguishment of debt | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Other non-operating income | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (12.9) | 0.9 | (3.0) |
Total other expense | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (15.2) | (1.2) | (4.0) |
Income (loss) from continuing operations before income taxes | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 516.2 | 754.4 | 454.7 |
Income tax benefit (expense) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (0.4) | 0.0 | 1.3 |
Equity in income of subsidiaries | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 18.3 | 25.5 | 11.8 |
Income from continuing operations | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 534.1 | 779.9 | 467.8 |
Income (loss) from discontinued operations, net of tax | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (0.3) | 12.3 | 1.7 |
Net income | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 469.5 |
Net Income (Loss) Attributable to Noncontrolling Interest | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (3.9) |
Net income attributable to Cliffs shareholders | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 533.8 | 792.2 | 473.4 |
Other comprehensive income (loss) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (35.8) | (24.1) | 12.9 |
Total comprehensive income (loss) attributable to Cliffs shareholders | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 498.0 | 768.1 | 486.3 |
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Revenues from product sales and services | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Cost of goods sold and operating expenses | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Sales margin | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Other operating income (expense): | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Selling, general and administrative expenses | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (0.4) | (0.3) | (5.8) |
Miscellaneous - net | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (1.1) | 4.3 | 16.8 |
Total other operating expense | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (1.5) | 4.0 | 11.0 |
Operating income (loss) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (1.5) | 4.0 | 11.0 |
Other income (expense): | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Interest income (expense), net | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.5 | 0.8 | 1.0 |
Loss on extinguishment of debt | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Other non-operating income | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 19.1 | 19.8 | 17.2 |
Total other expense | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 19.6 | 20.6 | 18.2 |
Income (loss) from continuing operations before income taxes | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 18.1 | 24.6 | 29.2 |
Income tax benefit (expense) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (0.2) | 0.5 | (0.3) |
Equity in income of subsidiaries | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 | 0.0 | 0.0 |
Income from continuing operations | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 17.9 | 25.1 | 28.9 |
Income (loss) from discontinued operations, net of tax | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (1.8) | 66.4 | 22.1 |
Net income | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 51.0 |
Net Income (Loss) Attributable to Noncontrolling Interest | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 0.0 |
Net income attributable to Cliffs shareholders | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 16.1 | 91.5 | 51.0 |
Other comprehensive income (loss) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 16.9 | (256.7) | (4.8) |
Total comprehensive income (loss) attributable to Cliffs shareholders | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 33.0 | $ (165.2) | $ 46.2 |