XML 104 R90.htm IDEA: XBRL DOCUMENT
v3.5.0.2

CASH FLOW INFORMATION (Reconciliation Of Capital Additions To Cash Paid For Capital Expenditures) (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2016 | Jun. 30, 2015
Supplemental Cash Flow Information [Abstract] |  |  |
Capital additions | [1] | $ 18.1 | $ 46.8
Cash paid for capital expenditures |  | 20.2 | 34.4
Difference (Non-cash accruals) |  | $ (2.1) | $ 12.4
[1] | Includes capital additions of $18.1 million related to continuing operations for the six months ended June 30, 2016. Includes capital additions of $28.9 million and $17.9 million related to continuing operations and discontinued operations, respectively, for the six months ended June 30, 2015.

X
- Definition Future cash outflow to pay for purchases of fixed assets that have occurred and the increase during the period in capital lease obligations due to entering into new capital leases. + References No definition available. + Details
Name: | clf_CapitalExpendituresIncurredButNotYetPaidAndCapitalLeaseObligationsIncurred
Namespace Prefix: | clf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Property, Plant and Equipment, Additions, Including Discontinued Operations + References No definition available. + Details
Name: | clf_PropertyPlantandEquipmentAdditionsIncludingDiscontinuedOperations
Namespace Prefix: | clf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration