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LONG-TERM DEBT - SCHEDULE OF LONG-TERM DEBT (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Total $ 710 $ 803
Less current portion 117 117
Long-term debt, less current portion $ 593 $ 686
Weighted-average fixed-interest rate 5.70% 5.70%
Weighted-average variable-interest rate 1.80% 1.60%
Debt payments $ 93  
Fixed-rate notes payable due through 2024 [Member]    
Debt Instrument [Line Items]    
Total 540 $ 614
Variable-rate notes payable due through 2025 [Member]    
Debt Instrument [Line Items]    
Total $ 170 $ 189