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LEGAL PROCEEDINGS, COMMITMENTS AND CONTINGENCIES (Tables)
 12 Months Ended
Dec. 31, 2013
Loss Contingencies [Line Items]  
Changes in the Reserve for Environmental Remediation
Changes in the Reserve for Environmental Remediation
DOLLAR AMOUNTS IN MILLIONS
Reserve balance as of December 31, 2012
$
32

Reserve charges and adjustments, net
4

Payments
(6
)
Reserve balance as of December 31, 2013
$
30

Total active sites as of December 31, 2013
50
Changes in the Reserve for Asset Retirement Obligations
Changes in the Reserve for Asset Retirement Obligations
DOLLAR AMOUNTS IN MILLIONS
Reserve balance as of December 31, 2012
$
63

Reserve charges and adjustments, net
8

Payments
(14
)
Other adjustments
(3
)
Reserve balance as of December 31, 2013
$
54
Our purchase obligations
Our purchase obligations as of December 31, 2013 were:
DOLLAR AMOUNTS IN MILLIONS
  
DECEMBER 31, 2013

2014
$
61

2015
$
16

2016
$
4

2017
$
3

2018
$
3

Thereafter
$
8
Our rent expense
Our rent expense was:
DOLLAR AMOUNTS IN MILLIONS
  
2013

2012

2011

Rent expense
$
43

$
42

$
47
Our operating lease commitments
Our operating lease commitments as of December 31, 2013 were:
DOLLAR AMOUNTS IN MILLIONS
  
DECEMBER 31, 2013

2014
$
39

2015
$
22

2016
$
19

2017
$
14

2018
$
10

Thereafter
$
112