Cleveland-Cliffs Inc. Annual report pursuant to Section 13 and 15(d)

CASH FLOW INFORMATION (Cash Paid for Interest and Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Supplemental Cash Flow Elements [Abstract]
Taxes paid on income	$ 443.2	$ 275.3	$ 208.3
Interest paid on debt obligations	$ 207.5	$ 175.1	$ 34.2

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.