Environmental and Legal Contingencies (Details 5) - Preliminary [Member]	Mar. 15, 2016	Jan. 11, 2016	Dec. 16, 2015	Nov. 02, 2015
US Trade Case - CORE [Member] | Countervailing Duty [Member] | CHINA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				235.66%
US Trade Case - CORE [Member] | Countervailing Duty [Member] | CHINA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate				26.26%
US Trade Case - CORE [Member] | Countervailing Duty [Member] | INDIA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				7.71%
US Trade Case - CORE [Member] | Countervailing Duty [Member] | INDIA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate				2.85%
US Trade Case - CORE [Member] | Countervailing Duty [Member] | ITALY | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				38.41%
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				1.37%
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] | Antidumping Duty [Member] | CHINA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				255.80%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | CHINA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate				255.80%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | INDIA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				6.92%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | INDIA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate				6.64%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | ITALY | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				3.11%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | ITALY | Minimum [Member]
Duty Rates [Line Items]
Duty Rate				0.00%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | KOREA, REPUBLIC OF | Maximum [Member]
Duty Rates [Line Items]
Duty Rate				3.51%
US Trade Case - CORE [Member] | Antidumping Duty [Member] | KOREA, REPUBLIC OF | Minimum [Member]
Duty Rates [Line Items]
Duty Rate				2.99%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | BRAZIL | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			7.42%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | BRAZIL | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			7.42%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | CHINA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			227.29%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | CHINA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			227.29%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | INDIA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			4.45%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | INDIA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			4.45%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | RUSSIAN FEDERATION | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			6.33%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | RUSSIAN FEDERATION | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			0.00%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | KOREA, REPUBLIC OF | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			0.00%
US Trade Case - ColdRolled [Member] | Countervailing Duty [Member] | KOREA, REPUBLIC OF | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			0.00%
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			20.84%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | CHINA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			265.79%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | CHINA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			265.79%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | INDIA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			6.78%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | INDIA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			6.78%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | JAPAN | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			71.35%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | JAPAN | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			71.35%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | RUSSIAN FEDERATION | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			16.89%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | RUSSIAN FEDERATION | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			12.62%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | KOREA, REPUBLIC OF | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			6.89%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | KOREA, REPUBLIC OF | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			2.17%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | UNITED KINGDOM | Maximum [Member]
Duty Rates [Line Items]
Duty Rate			31.39%
US Trade Case - ColdRolled [Member] | Antidumping Duty [Member] | UNITED KINGDOM | Minimum [Member]
Duty Rates [Line Items]
Duty Rate			5.79%
US Trade Case - HotRolled [Member] | Countervailing Duty [Member] | BRAZIL | Maximum [Member]
Duty Rates [Line Items]
Duty Rate		7.42%
US Trade Case - HotRolled [Member] | Countervailing Duty [Member] | BRAZIL | Minimum [Member]
Duty Rates [Line Items]
Duty Rate		7.42%
US Trade Case - HotRolled [Member] | Countervailing Duty [Member] | KOREA, REPUBLIC OF | Maximum [Member]
Duty Rates [Line Items]
Duty Rate		0.00%
US Trade Case - HotRolled [Member] | Countervailing Duty [Member] | KOREA, REPUBLIC OF | Minimum [Member]
Duty Rates [Line Items]
Duty Rate		0.00%
US Trade Case - HotRolled [Member] | Countervailing Duty [Member] | TURKEY | Maximum [Member]
Duty Rates [Line Items]
Duty Rate		0.00%
US Trade Case - HotRolled [Member] | Countervailing Duty [Member] | TURKEY | Minimum [Member]
Duty Rates [Line Items]
Duty Rate		0.00%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | AUSTRALIA | Maximum [Member]
Duty Rates [Line Items]
Duty Rate	23.25%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | AUSTRALIA | Minimum [Member]
Duty Rates [Line Items]
Duty Rate	23.25%
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	33.91%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | JAPAN | Maximum [Member]
Duty Rates [Line Items]
Duty Rate	11.29%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | JAPAN | Minimum [Member]
Duty Rates [Line Items]
Duty Rate	6.79%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | NETHERLANDS | Maximum [Member]
Duty Rates [Line Items]
Duty Rate	5.07%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | NETHERLANDS | Minimum [Member]
Duty Rates [Line Items]
Duty Rate	5.07%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | KOREA, REPUBLIC OF | Maximum [Member]
Duty Rates [Line Items]
Duty Rate	7.33%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | KOREA, REPUBLIC OF | Minimum [Member]
Duty Rates [Line Items]
Duty Rate	3.97%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | TURKEY | Maximum [Member]
Duty Rates [Line Items]
Duty Rate	7.07%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | TURKEY | Minimum [Member]
Duty Rates [Line Items]
Duty Rate	5.24%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | UNITED KINGDOM | Maximum [Member]
Duty Rates [Line Items]
Duty Rate	49.05%
US Trade Case - HotRolled [Member] | Antidumping Duty [Member] | UNITED KINGDOM | Minimum [Member]
Duty Rates [Line Items]
Duty Rate	49.05%