NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES (Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended			6 Months Ended		1 Months Ended	6 Months Ended			6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Revolving Credit Facility Agreement [Member]	Jun. 30, 2013 Long-term Debt [Member]	Jun. 30, 2012 Long-term Debt [Member]	Jan. 31, 2012 Pollution control industrial revenue bonds [Member]	Jun. 30, 2012 Long Term Debt entered into by Variable Interest Entities [Member]	Jun. 30, 2013 Inter Notes [Member]	Jun. 30, 2012 Redemption of Notes [Member] Four point eight five percent notes due August 15, 2012 [Member]	Jun. 30, 2013 Redemption of Notes [Member] Five point six percents due March 15, 2013 [Member]
Notes Payable Long Term Debt and Available Credit Facilities [Line Items]
Debt Instrument, Interest Rate, Stated Percentage									4.85%	5.60%
Proceeds from issuance of long-term debt	$ 558	$ 446		$ 142	$ 210		$ 224
Repayments of Notes Payable						37		80		250
Debt instrument covenant, ratio of indebtedness to net capital, maximum	0.65
Amount of debt, if exceeded, causes company to comply with capitalization ratios			500
Amount at which a failure to pay results in default	100
Permitted amount of acceleration of principal which causes default	400
Amount of judgment which causes default	$ 400