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Quarterly report pursuant to Section 13 or 15(d)

Segment Reporting (Schedule of Segment Reporting Information, by Segment) (Details)

 v2.3.0.11
Segment Reporting (Schedule of Segment Reporting Information, by Segment) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Percentage of revenues from product sales and services 100.00% 100.00% 100.00% 100.00%
Revenues from product sales and services $ 1,805.8 $ 1,184.3 $ 2,989.0 $ 1,912.0
Sales margin 730.8 414.7 1,329.5 564.7
Other operating expense (113.9) (48.9) (171.4) (85.5)
Other income (expense) (27.7) (14.1) (6.6) 19.7
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND EQUITY INCOME (LOSS) FROM VENTURE 589.2 351.7 1,151.5 498.9
Depreciation, depletion and amortization 105.4 88.5 185.2 155.1
Capital additions 206.4 [1] 46.9 [1] 297.4 [1] 70.7 [1]
U.S. Iron Ore [Member]
Ìý Ìý Ìý Ìý
Percentage of revenues from product sales and services 49.00% 51.00% 47.00% 52.00%
Revenues from product sales and services 885.2 604.0 1,395.3 988.4
Sales margin 441.1 179.8 802.4 281.3
Depreciation, depletion and amortization 22.2 15.7 39.5 27.5
Capital additions 55.7 [1] 19.2 [1] 87.3 [1] 27.2 [1]
Eastern Canadian Iron Ore [Member]
Ìý Ìý Ìý Ìý
Percentage of revenues from product sales and services 16.00% 9.00% 14.00% 10.00%
Revenues from product sales and services 297.6 110.8 424.9 183.7
Sales margin 68.5 28.7 103.0 36.7
Depreciation, depletion and amortization 30.1 14.4 39.9 25.6
Capital additions 60.7 [1] 3.2 [1] 64.2 [1] 4.6 [1]
North American Coal [Member]
Ìý Ìý Ìý Ìý
Percentage of revenues from product sales and services 9.00% 10.00% 11.00% 10.00%
Revenues from product sales and services 159.7 116.2 324.7 197.3
Sales margin (14.8) 23.0 (17.7) 12.4
Depreciation, depletion and amortization 20.8 11.3 42.4 23.0
Capital additions 28.5 [1] 9.8 [1] 56.0 [1] 13.9 [1]
Asia Pacific Iron Ore [Member]
Ìý Ìý Ìý Ìý
Percentage of revenues from product sales and services 21.00% 26.00% 24.00% 25.00%
Revenues from product sales and services 381.6 309.4 727.0 468.9
Sales margin 205.0 169.1 400.8 212.8
Depreciation, depletion and amortization 24.9 40.3 48.9 66.2
Capital additions 58.0 [1] 12.5 [1] 83.3 [1] 20.2 [1]
Other Segment [Member]
Ìý Ìý Ìý Ìý
Percentage of revenues from product sales and services 5.00% 4.00% 4.00% 4.00%
Revenues from product sales and services 81.7 43.9 117.1 73.7
Sales margin 31.0 14.1 41.0 21.5
Depreciation, depletion and amortization 7.4 6.8 14.5 12.8
Capital additions $ 3.5 [1] $ 2.2 [1] $ 6.6 [1] $ 4.8 [1]
[1] Includes capital lease additions and non-cash accruals.