Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. This includes related party transactions. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer); and carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

No definition available.

Segment Information (Details 2) (USD $)	3 Months Ended								12 Months Ended
Segment Information (Details 2) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating income (loss)
Corporate SG & A									$ (316,214,000)	$ (272,777,000)	$ (257,943,000)
Profit sharing									(42,126,000)us-gaap_OtherLaborRelatedExpenses	(27,764,000)us-gaap_OtherLaborRelatedExpenses	(26,987,000)us-gaap_OtherLaborRelatedExpenses
Operating income	(81,160,000)us-gaap_OperatingIncomeLoss	188,643,000us-gaap_OperatingIncomeLoss	131,905,000us-gaap_OperatingIncomeLoss	80,932,000us-gaap_OperatingIncomeLoss	107,822,000us-gaap_OperatingIncomeLoss	113,273,000us-gaap_OperatingIncomeLoss	69,198,000us-gaap_OperatingIncomeLoss	96,232,000us-gaap_OperatingIncomeLoss	320,320,000us-gaap_OperatingIncomeLoss	386,525,000us-gaap_OperatingIncomeLoss	391,165,000us-gaap_OperatingIncomeLoss
Acquisition and related costs		25,000,000
Assets
Cash and equivalents	361,363,000				395,156,000				361,363,000	395,156,000	375,917,000	390,761,000
Accounts receivable	859,835,000us-gaap_AccountsReceivableNetCurrent				664,208,000us-gaap_AccountsReceivableNetCurrent				859,835,000us-gaap_AccountsReceivableNetCurrent	664,208,000us-gaap_AccountsReceivableNetCurrent
Inventories	1,618,419,000us-gaap_InventoryNet				1,314,747,000us-gaap_InventoryNet				1,618,419,000us-gaap_InventoryNet	1,314,747,000us-gaap_InventoryNet
Deferred income taxes	35,503,000				17,964,000				35,503,000	17,964,000
Property, plant and equipment, net	3,123,906,000us-gaap_PropertyPlantAndEquipmentNet				2,226,134,000us-gaap_PropertyPlantAndEquipmentNet				3,123,906,000us-gaap_PropertyPlantAndEquipmentNet	2,226,134,000us-gaap_PropertyPlantAndEquipmentNet
Other	97,529,000				115,083,000				97,529,000	115,083,000
Total assets	7,311,027,000us-gaap_Assets				5,933,006,000us-gaap_Assets				7,311,027,000us-gaap_Assets	5,933,006,000us-gaap_Assets	5,815,416,000us-gaap_Assets
Liabilities
Accounts payable	511,056,000				414,932,000				511,056,000	414,932,000
Income taxes payable	6,086,000us-gaap_AccruedIncomeTaxesCurrent				4,023,000us-gaap_AccruedIncomeTaxesCurrent				6,086,000us-gaap_AccruedIncomeTaxesCurrent	4,023,000us-gaap_AccruedIncomeTaxesCurrent
Accrued interest	50,405,000us-gaap_InterestPayableCurrent				31,363,000us-gaap_InterestPayableCurrent				50,405,000us-gaap_InterestPayableCurrent	31,363,000us-gaap_InterestPayableCurrent
Debt	3,024,166,000us-gaap_LongTermDebt				2,107,589,000us-gaap_LongTermDebt				3,024,166,000us-gaap_LongTermDebt	2,107,589,000us-gaap_LongTermDebt
Deferred income taxes	542,033,000				556,038,000				542,033,000	556,038,000
Liabilities	4,389,160,000us-gaap_Liabilities				3,320,637,000us-gaap_Liabilities				4,389,160,000us-gaap_Liabilities	3,320,637,000us-gaap_Liabilities	3,338,760,000us-gaap_Liabilities
Severstal Columbus LLC
Operating income (loss)
Acquisition and related costs									25,200,000
Operating Segment \| Other.
Operating income (loss)
Corporate SG & A									(42,000,000)	(37,300,000)	(32,300,000)
Company-wide equity- based compensation									(22,800,000)	(13,900,000)	(8,300,000)
Profit sharing									(36,300,000)	(23,100,000)	(20,500,000)
Other, net									2,200,000	2,900,000	(5,700,000)
Operating income									(98,879,000)	(71,446,000)	(66,829,000)
Assets
Cash and equivalents	267,800,000				325,700,000				267,800,000	325,700,000	327,100,000
Investments in short-term commercial paper											31,500,000
Accounts receivable	10,000,000				8,500,000				10,000,000	8,500,000	8,700,000
Inventories	21,000,000				10,400,000				21,000,000	10,400,000	11,500,000
Deferred income taxes	35,400,000				23,200,000				35,400,000	23,200,000	23,400,000
Property, plant and equipment, net	68,900,000				72,500,000				68,900,000	72,500,000	75,500,000
Debt issuance costs, net	42,000,000				26,000,000				42,000,000	26,000,000	27,900,000
Intra-company debt	137,100,000				159,300,000				137,100,000	159,300,000	141,100,000
Other	57,600,000				61,000,000				57,600,000	61,000,000	67,400,000
Total assets	639,844,000				686,594,000				639,844,000	686,594,000	714,069,000
Liabilities
Accounts payable	50,700,000				36,300,000				50,700,000	36,300,000	32,200,000
Income taxes payable	6,100,000				4,000,000				6,100,000	4,000,000	17,100,000
Accrued interest	50,200,000				31,200,000				50,200,000	31,200,000	35,100,000
Accrued profit sharing	36,800,000				23,400,000				36,800,000	23,400,000	20,700,000
Debt	2,953,300,000				2,038,300,000				2,953,300,000	2,038,300,000	2,152,200,000
Deferred income taxes	71,400,000				190,200,000				71,400,000	190,200,000	218,200,000
Other	32,000,000				26,300,000				32,000,000	26,300,000	22,300,000
Liabilities	3,200,497,000				2,349,722,000				3,200,497,000	2,349,722,000	2,497,750,000
Operating Segment \| Other. \| Severstal Columbus LLC
Operating income (loss)
Acquisition and related costs									$ 25,200,000