根据第13或15(d)条提交的季度报告

商誉及其他无形资产及负债（按主要类别划分的无形资产一览表）（详情）

v2.4.1.9
商誉及其他无形资产和负债（按主要类别划分的有限寿命无形资产一览表）（详情）（美元）
除非另有说明，单位为百万
2015年3月31日
2014年12月31日
有限寿命无形资产〔细目〕    
固定的无形资产-帐面总额 78.7美元us-gaap_FiniteLivedIntangibleAssetsGross 79.2美元us-gaap_FiniteLivedIntangibleAssetsGross
确定活无形资产-累计摊销 (17.5)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization (16.5)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
固定活无形资产-净账面金额 61.2us-gaap_FiniteLivedIntangibleAssetsNet 62.7us-gaap_FiniteLivedIntangibleAssetsNet
许可证[成员]|其他资产[成员]    
有限寿命无形资产〔细目〕    
固定的无形资产-帐面总额 78.7us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_UseRightsMember 		79.2us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_UseRightsMember
确定活无形资产-累计摊销 (17.5)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_UseRightsMember 		(16.5)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_UseRightsMember
固定活无形资产-净账面金额 61.2us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_UseRightsMember 		62.7us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_UseRightsMember
以下是市场销售合同[成员]    
有限寿命无形资产〔细目〕    
固定的无形资产-帐面总额 (228.9)us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember 		(228.9)us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember
确定活无形资产-累计摊销 182.8us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember 		182.8us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember
固定活无形资产-净账面金额 (46.1)us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember 		(46.1)us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember
低于市场销售合同[成员]b|其他流动负债[成员]    
有限寿命无形资产〔细目〕    
固定的无形资产-帐面总额 (23.0)us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember 		(23.0)us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember
固定活无形资产-净账面金额 (23.0)us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember 		(23.0)us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember
低于市场销售合同[成员]b|其他负债[成员]    
有限寿命无形资产〔细目〕    
固定的无形资产-帐面总额 (205.9)us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember 		(205.9)us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember
确定活无形资产-累计摊销 182.8us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember 		182.8us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember
固定活无形资产-净账面金额 (23.1美元)us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember 		(23.1美元)us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= clf_BelowMarketSalesContractsMember