AGÕæÈËÆ½Ì¨AGÕæÈËÊÔÍæ

Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Carrying Value and Fair Value of Financial Instruments Disclosure) (Details)

� v2.3.0.11
Fair Value of Financial Instruments (Carrying Value and Fair Value of Financial Instruments Disclosure) (Details) (USD $)
In Millions
Jun. 30, 2011
Dec. 31, 2010
Long-term debt: Ìý Ìý
Total long-term debt $ 3,898.8 $ 1,713.1
Term Loan $1.25 Billion [Member] | Carrying Value [Member]
Ìý Ìý
Long-term debt: Ìý Ìý
Senior notes 1,187.5 Ìý
Term Loan $1.25 Billion [Member] | Fair Value [Member]
Ìý Ìý
Long-term debt: Ìý Ìý
Senior notes 1,187.5 Ìý
Senior Notes $1.3 Billion [Member] | Carrying Value [Member]
Ìý Ìý
Long-term debt: Ìý Ìý
Senior notes 1,289.1 990.3
Senior Notes $1.3 Billion [Member] | Fair Value [Member]
Ìý Ìý
Long-term debt: Ìý Ìý
Senior notes 1,299.9 972.5
Senior Notes $325 Million [Member] | Carrying Value [Member]
Ìý Ìý
Long-term debt: Ìý Ìý
Senior notes 325.0 325.0
Senior Notes $325 Million [Member] | Fair Value [Member]
Ìý Ìý
Long-term debt: Ìý Ìý
Senior notes 353.9 355.6
Senior Notes $400 Million [Member] | Carrying Value [Member]
Ìý Ìý
Long-term debt: Ìý Ìý
Senior notes 397.9 397.8
Senior Notes $400 Million [Member] | Fair Value [Member]
Ìý Ìý
Long-term debt: Ìý Ìý
Senior notes 430.2 422.8
Senior Notes $700 Million due 2021 [Member] | Carrying Value [Member]
Ìý Ìý
Long-term debt: Ìý Ìý
Senior notes 699.3 Ìý
Senior Notes $700 Million due 2021 [Member] | Fair Value [Member]
Ìý Ìý
Long-term debt: Ìý Ìý
Senior notes 684.0 Ìý
Carrying Value [Member]
Ìý Ìý
Long-term receivables: Ìý Ìý
Receivables 60.7 [1] 63.2 [1]
Long-term debt: Ìý Ìý
Customer borrowings 5.1 4.0
Total long-term debt 3,903.9 1,717.1
Carrying Value [Member] | Customer supplemental payments [Member]
Ìý Ìý
Long-term receivables: Ìý Ìý
Receivables 22.3 22.3
Carrying Value [Member] | ArcelorMittal USA-Ispat receivable [Member]
Ìý Ìý
Long-term receivables: Ìý Ìý
Receivables 29.7 32.8
Carrying Value [Member] | Other credit receivable [Member]
Ìý Ìý
Long-term receivables: Ìý Ìý
Receivables 8.7 8.1
Fair Value [Member]
Ìý Ìý
Long-term receivables: Ìý Ìý
Receivables 63.6 [1] 66.5 [1]
Long-term debt: Ìý Ìý
Customer borrowings 5.1 4.0
Total long-term debt 3,960.6 1,754.9
Fair Value [Member] | Customer supplemental payments [Member]
Ìý Ìý
Long-term receivables: Ìý Ìý
Receivables 19.9 19.5
Fair Value [Member] | ArcelorMittal USA-Ispat receivable [Member]
Ìý Ìý
Long-term receivables: Ìý Ìý
Receivables 35.0 38.9
Fair Value [Member] | Other credit receivable [Member]
Ìý Ìý
Long-term receivables: Ìý Ìý
Receivables $ 8.7 $ 8.1
[1] Includes current portion.