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Quarterly report pursuant to Section 13 or 15(d)

Debt and Credit Facilities (Narrative) (Details)

 v2.3.0.11
Debt and Credit Facilities (Narrative) (Details)
3 Months Ended 3 Months Ended
Mar. 31, 2011
USD ($)
Jun. 30, 2011
USD ($)
Jun. 30, 2011
Senior Notes [Member]
Consolidated Thompson [Member]
USD ($)
Jun. 30, 2011
Term Loan $1.25 Billion [Member]
Consolidated Thompson [Member]
Sep. 30, 2010
Senior Notes $700 Million due 2021 [Member]
USD ($)
Jun. 30, 2011
Asia Pacific Iron Ore [Member]
Credit Facility Amendment [Member]
USD ($)
Jun. 30, 2011
Asia Pacific Iron Ore [Member]
Credit Facility Amendment [Member]
AUD
Mar. 31, 2010
Asia Pacific Iron Ore [Member]
Credit Facility Amendment [Member]
USD ($)
Mar. 31, 2010
Asia Pacific Iron Ore [Member]
Credit Facility Amendment [Member]
AUD
Jun. 30, 2011
Consolidated Thompson [Member]
USD ($)
May 10, 2011
Consolidated Thompson [Member]
USD ($)
Jul. 31, 2011
Bloom Lake [Member]
USD ($)
Mar. 31, 2011
Senior Notes 30-Year Tranche [Member]
USD ($)
Mar. 31, 2011
Senior Notes 10-Year Tranche [Member]
USD ($)
Jun. 30, 2011
Revolving Credit Facility [Member]
USD ($)
Dec. 31, 2010
Revolving Credit Facility [Member]
USD ($)
Senior notes Ìý Ìý $ 125,000,000 Ìý $ 500,000,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý $ 300,000,000 $ 700,000,000 Ìý Ìý
Face Amount of Senior Long Term Notes 1,000,000,000 Ìý 100,000,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Stated interest rate Ìý Ìý 8.50% Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý 6.25% 4.875% Ìý Ìý
Discount interest rate on redemption Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý 40 25 Ìý Ìý
Premium on principal required to redeem notes 101.00% Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Redemption price, percent of principal in the event of change of control 100.00% Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Credit facility Ìý Ìý Ìý Ìý Ìý Ìý Ìý 42,900,000 40,000,000 Ìý 750,000,000 Ìý Ìý Ìý Ìý Ìý
Customer borrowings Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý 1,250,000,000 Ìý Ìý Ìý Ìý Ìý
Weighted average interest rate Ìý Ìý Ìý 2.05% Ìý Ìý Ìý Ìý Ìý 2.56% Ìý Ìý Ìý Ìý Ìý Ìý
Outstanding bank guarantees under credit facilities Ìý Ìý Ìý Ìý Ìý 26,100,000 24,300,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý 66,600,000 64,700,000
Credit facility remaining capacity Ìý Ìý Ìý Ìý Ìý 16,800,000 15,700,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý 533,400,000 535,300,000
Letters of Credit Outstanding, Amount Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý 48,700,000 Ìý 14,300,000 Ìý Ìý Ìý Ìý
Maturities of debt instruments in 2011 Ìý 31,000,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Maturities of debt instruments in 2012 Ìý 94,000,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Maturities of debt instruments in 2013 Ìý 395,000,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Maturities of debt instruments in 2014 Ìý 156,000,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Maturities of debt instruments in 2015 Ìý 524,000,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Maturities of debt instruments in 2016 Ìý 375,000,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Maturities of debt instruments after 2016 Ìý $ 2,400,000,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý