Acquisitions And Other Investments (Wabush Purchase Price Allocation) (Details) (USD $) In Millions |
Dec. 31, 2010 |
Dec. 31, 2010
Scenario, Adjustment [Member]
Wabush [Member]
|
Mar. 31, 2010
Scenario, Previously Reported [Member]
Wabush [Member]
|
|---|---|---|---|
| Cash | 听 | $ 88.0 | 听 |
| Working capital adjustments | 听 | 15.0 | 听 |
| Fair value of total consideration transferred | 听 | 103.0 | 听 |
| Fair value of Cliffs' equity interest in acquiree held prior to acquisition of remaining interest | 听 | 38.0 | 39.7 |
| Total net assets acquired | $ (1.7) | 听 | 听 |
| X | ||||||||||
- Definition Amount of cash paid to acquire the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Fair value of noncash consideration given by the acquirer to acquire the entity. Does not include cash paid, the fair value of debt and securities issued and liabilities incurred to acquire the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition This element represents the sum of the: (1) acquisition-date fair value of the total consideration transferred which consists of the sum of the acquisition-date fair values of the assets transferred by the acquirer, the liabilities incurred by the acquirer to former owners of the acquiree, and the equity interests issued by the acquirer and (2) the acquisition-date fair value of any equity interest in the acquiree held by the acquirer prior to the business combination (for example, a step acquisition). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition In a business combination achieved in stages, this element represents the acquisition-date fair value of the equity interest in the acquiree held by the acquirer immediately before the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|