Environmental and Legal Contingencies (Details 5) - Final [Member]	Feb. 02, 2017	Aug. 05, 2016	Jul. 21, 2016	May 25, 2016	May 17, 2016
US Trade Case - CORE [Member] | Countervailing Duty [Member] | CHINA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				241.07%
US Trade Case - CORE [Member] | Countervailing Duty [Member] | CHINA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate				39.05%
US Trade Case - CORE [Member] | Countervailing Duty [Member] | INDIA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				29.49%
US Trade Case - CORE [Member] | Countervailing Duty [Member] | INDIA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate				8.00%
US Trade Case - CORE [Member] | Countervailing Duty [Member] | ITALY | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				38.51%
US Trade Case - CORE [Member] | Countervailing Duty [Member] | ITALY | Minimum [Member]
Duty Rates [Line Items]
Duty Rate				0.00%
US Trade Case - CORE [Member] | Countervailing Duty [Member] | KOREA, REPUBLIC OF | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				1.19%
US Trade Case - CORE [Member] | Countervailing Duty [Member] | KOREA, REPUBLIC OF | Minimum [Member]
Duty Rates [Line Items]
Duty Rate				0.00%
US Trade Case - CORE [Member] | Countervailing Duty [Member] | TAIWAN, PROVINCE OF CHINA
Duty Rates [Line Items]
Duty Rate				0.00%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | CHINA
Duty Rates [Line Items]
Duty Rate				209.97%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | INDIA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				4.43%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | INDIA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate				3.05%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | ITALY | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				92.12%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | ITALY | Minimum [Member]
Duty Rates [Line Items]
Duty Rate				12.63%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | KOREA, REPUBLIC OF | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				47.80%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | KOREA, REPUBLIC OF | Minimum [Member]
Duty Rates [Line Items]
Duty Rate				8.75%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | TAIWAN, PROVINCE OF CHINA
Duty Rates [Line Items]
Duty Rate				10.34%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | CHINA
Duty Rates [Line Items]
Duty Rate					256.44%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | INDIA
Duty Rates [Line Items]
Duty Rate			10.00%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | KOREA, REPUBLIC OF | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			59.72%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | KOREA, REPUBLIC OF | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			3.89%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | BRAZIL | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			11.31%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | BRAZIL | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			11.09%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | CHINA
Duty Rates [Line Items]
Duty Rate					265.79%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | INDIA
Duty Rates [Line Items]
Duty Rate			7.60%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | KOREA, REPUBLIC OF | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			34.33%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | KOREA, REPUBLIC OF | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			6.32%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | BRAZIL | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			35.43%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | BRAZIL | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			19.58%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | JAPAN
Duty Rates [Line Items]
Duty Rate					71.35%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | UNITED KINGDOM | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			25.17%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | UNITED KINGDOM | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			5.40%
US Trade Case - HotRolled [Member] | Countervailing Duty [Member] | KOREA, REPUBLIC OF | Maximum [Member]
Duty Rates [Line Items]
Duty Rate		58.68%
US Trade Case - HotRolled [Member] | Countervailing Duty [Member] | KOREA, REPUBLIC OF | Minimum [Member]
Duty Rates [Line Items]
Duty Rate		3.89%
US Trade Case - HotRolled [Member] | Countervailing Duty [Member] | BRAZIL | Maximum [Member]
Duty Rates [Line Items]
Duty Rate		11.30%
US Trade Case - HotRolled [Member] | Countervailing Duty [Member] | BRAZIL | Minimum [Member]
Duty Rates [Line Items]
Duty Rate		11.09%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | KOREA, REPUBLIC OF | Maximum [Member]
Duty Rates [Line Items]
Duty Rate		9.49%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | KOREA, REPUBLIC OF | Minimum [Member]
Duty Rates [Line Items]
Duty Rate		4.61%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | BRAZIL | Maximum [Member]
Duty Rates [Line Items]
Duty Rate		34.28%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | BRAZIL | Minimum [Member]
Duty Rates [Line Items]
Duty Rate		33.14%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | JAPAN | Maximum [Member]
Duty Rates [Line Items]
Duty Rate		7.51%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | JAPAN | Minimum [Member]
Duty Rates [Line Items]
Duty Rate		4.99%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | UNITED KINGDOM
Duty Rates [Line Items]
Duty Rate		33.06%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | AUSTRALIA
Duty Rates [Line Items]
Duty Rate		29.58%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | NETHERLANDS
Duty Rates [Line Items]
Duty Rate		3.73%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | TURKEY | Maximum [Member]
Duty Rates [Line Items]
Duty Rate		6.77%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | TURKEY | Minimum [Member]
Duty Rates [Line Items]
Duty Rate		4.15%
US Trade Case - Stainless [Member] | Countervailing Duty [Member] | CHINA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate	190.71%
US Trade Case - Stainless [Member] | Countervailing Duty [Member] | CHINA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate	75.60%
US Trade Case - Stainless [Member] | Antidumping Duty [Member] | CHINA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate	76.64%
US Trade Case - Stainless [Member] | Antidumping Duty [Member] | CHINA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate	63.86%