Cleveland-Cliffs Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Commitments And Contingencies (Detail)

Commitments And Contingencies (Detail) (USD $)	6 Months Ended	24 Months Ended	6 Months Ended				12 Months Ended		6 Months Ended
Commitments And Contingencies (Detail) (USD $)	Jun. 30, 2012 Koolyanobbing Rail Upgrade [Member]	Dec. 31, 2014 Koolyanobbing Rail Upgrade [Member] Subsequent Event [Member]	Jun. 30, 2012 Bloom Lake [Member]	Dec. 31, 2012 Bloom Lake [Member] Subsequent Event [Member]	Jun. 30, 2012 Empire And Tilden [Member]	Dec. 31, 2012 Empire And Tilden [Member] Subsequent Event [Member]	Dec. 31, 2013 Empire And Tilden [Member] Subsequent Event [Member]	Jun. 30, 2012 Empire [Member] ton	Jun. 30, 2012 Tilden [Member] ton
Related Party Transaction [Line Items]
Capital investment required			$ 1,300,000,000
Capital investment committed	33,000,000		819,000,000		203,000,000
Capital Expenditures related to commitment	17,000,000		369,000,000		169,000,000
Capital investment, future payments		16,000,000		450,000,000		32,000,000	2,000,000
Capital investment commitment					$ 245,000,000
Gross post-project production capacity, metric tons annually								3,000,000
Increase in production capacity, metric tons annually									2,000,000

The cash outflow for acquisition of or capital improvements of property, plant and equipment, used to produce goods or deliver services, and not otherwise defined in the taxonomy.

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