|
Acquisitions And Other Investments (Schedule Of Unaudited Consolidated Proforma Information Table Text Block) (Details) (Consolidated Thompson [Member], USD $)
In Millions, except Per Share data, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
|
Consolidated Thompson [Member]
|
||
| Business Acquisition [Line Items] | ||
| REVENUES FROM PRODUCT SALES AND SERVICES | $ 7,002.7 | $ 4,982.9 |
| NET INCOME ATTRIBUTABLE TO CLIFFS SHAREHOLDERS | $ 1,612.3 | $ 912.5 |
| EARNINGS PER COMMON SHARE ATTRIBUTABLE TO CLIFFS SHAREHOLDERS - BASIC | $ 11.50 | $ 6.74 |
| EARNINGS PER COMMON SHARE ATTRIBUTABLE TO CLIFFS SHAREHOLDERS - DILUTED | $ 11.43 | $ 6.70 |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|