日韩三级片

Annual report pursuant to Section 13 and 15(d)

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Revenue Reimbursement) (Details)

v2.4.1.9
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Revenue Reimbursement) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Reimbursement Revenue $ 392.9us-gaap_ReimbursementRevenue $ 344.8us-gaap_ReimbursementRevenue $ 351.8us-gaap_ReimbursementRevenue
U.S. Iron Ore [Member] 听 听 听
Reimbursement Revenue 271.0us-gaap_ReimbursementRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= clf_USIronOreMember 		259.5us-gaap_ReimbursementRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= clf_USIronOreMember 		250.8us-gaap_ReimbursementRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= clf_USIronOreMember
U.S. Iron Ore [Member] | Freight Revenue [Member] 听 听 听
Reimbursement Revenue 163.0us-gaap_ReimbursementRevenue
/ clf_ReimbursementRevenueByTypeAxis
= clf_FreightRevenueMember
/ us-gaap_StatementBusinessSegmentsAxis
= clf_USIronOreMember 		177.3us-gaap_ReimbursementRevenue
/ clf_ReimbursementRevenueByTypeAxis
= clf_FreightRevenueMember
/ us-gaap_StatementBusinessSegmentsAxis
= clf_USIronOreMember 		142.0us-gaap_ReimbursementRevenue
/ clf_ReimbursementRevenueByTypeAxis
= clf_FreightRevenueMember
/ us-gaap_StatementBusinessSegmentsAxis
= clf_USIronOreMember
U.S. Iron Ore [Member] | Co-venturer [Member] 听 听 听
Reimbursement Revenue $ 108.0us-gaap_ReimbursementRevenue
/ clf_ReimbursementRevenueByTypeAxis
= us-gaap_CoVenturerMember
/ us-gaap_StatementBusinessSegmentsAxis
= clf_USIronOreMember 		$ 82.2us-gaap_ReimbursementRevenue
/ clf_ReimbursementRevenueByTypeAxis
= us-gaap_CoVenturerMember
/ us-gaap_StatementBusinessSegmentsAxis
= clf_USIronOreMember 		$ 108.8us-gaap_ReimbursementRevenue
/ clf_ReimbursementRevenueByTypeAxis
= us-gaap_CoVenturerMember
/ us-gaap_StatementBusinessSegmentsAxis
= clf_USIronOreMember