SEGMENT AND RELATED INFORMATION: (Details 3) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of revenue by geographical location
Net sales outside of segments	$ 1,535,200,000	$ 1,384,500,000	$ 1,410,200,000	$ 1,623,000,000	$ 1,651,100,000	$ 1,552,400,000	$ 1,659,900,000	$ 1,805,900,000	$ 5,952,943,000	$ 6,669,266,000	$ 6,818,721,000
Derivative instruments											13,500,000
United States
Schedule of revenue by geographical location
Net sales outside of segments									1,031,200,000	1,567,400,000	2,103,700,000
Europe
Schedule of revenue by geographical location
Net sales outside of segments									1,057,500,000	1,365,100,000	1,292,100,000
Mexican Operations
Schedule of revenue by geographical location
Net sales outside of segments									1,403,300,000	1,676,400,000	1,269,300,000
Peru
Schedule of revenue by geographical location
Net sales outside of segments									324,800,000	296,200,000	261,700,000
Brazil
Schedule of revenue by geographical location
Net sales outside of segments									471,000,000	449,000,000	598,500,000
Chile
Schedule of revenue by geographical location
Net sales outside of segments									366,100,000	443,500,000	515,800,000
Latin America, other
Schedule of revenue by geographical location
Net sales outside of segments									391,800,000	108,300,000	101,200,000
Asia
Schedule of revenue by geographical location
Net sales outside of segments									$ 907,200,000	$ 763,400,000	$ 662,900,000