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PROPERTY AND EQUIPMENT (Tables)
12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment [Line Items]  
Carrying Value of Property and Equipment and Estimated Service Lives
Carrying Value of Property and Equipment and Estimated Service Lives
DOLLAR AMOUNTS IN MILLIONS
  
RANGE OF LIVES
DECEMBER 31,
2013

DECEMBER 31,
2012

Property and equipment, at cost:
 
 
 
Land
N/A  
$
129

$
129

Buildings and improvements
5–40
1,275

1,327

Machinery and equipment
2–25
6,742

6,926

Roads
10–20
594

549

Other
3–10
332

329

Total cost
 
9,072

9,260

Allowance for depreciation and amortization
 
(6,368
)
(6,388
)
Property and equipment, net
 
$
2,704

$
2,872