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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)
 9 Months Ended
Sep. 30, 2016
Estimated Fair Values and Carrying Values of Long-Term Debt
The estimated fair values and carrying values of our long-term debt consisted of the following:
 
SEPTEMBER 30,
2016
 
DECEMBER 31,
2015
DOLLAR AMOUNTS IN MILLIONS
CARRYING 
VALUE
 
FAIR VALUE
(LEVEL 2)
 
CARRYING 
VALUE
 
FAIR VALUE
(LEVEL 2)
Long-term debt (including current maturities):
 
 
 
 
 
 
 
Fixed rate
$
6,063

 
$
7,204

 
$
4,238

 
$
4,967

Variable rate
2,247

 
2,250

 
549

 
550

Total Debt
$
8,310

 
$
9,454

 
$
4,787

 
$
5,517