LONG-TERM DEBT - SCHEDULE OF LONG-TERM DEBT (DETAILS) (USD $) In Millions, unless otherwise specified			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Scheduled Debt Payments [Member]	Mar. 31, 2014 Fixed-rate notes payable due through 2024	Dec. 31, 2013 Fixed-rate notes payable due through 2024	Mar. 31, 2014 Variable-rate notes payable due through 2023	Dec. 31, 2013 Variable-rate notes payable due through 2023
Debt Instrument [Line Items]
Long-term Debt	$ 834	$ 871		$ 678	$ 703	$ 156	$ 168
Less current portion	113	117
Long-term debt, net of current portion	721	754
Weighted-average fixed-interest rate	5.70%	5.70%
Weighted-average variable-interest rate	1.70%	1.70%
Debt payments			37
Long-term Debt, Fiscal Year Maturity [Abstract]
Remainder of 2014	80
2015	113
2016	111
2017	116
2018	147
Thereafter	267
Long-term Debt	$ 834	$ 871		$ 678	$ 703	$ 156	$ 168