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RESERVE ROLLFORWARDS
12 Months Ended
Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract]  
RESERVE ROLLFORWARDS
RESERVE ROLLFORWARDS

Valuation and Qualifying Accounts
 
 
 
Additions
 
 
 
 
 
Balance at January 1,
2015
 
Charges (Credits) to Cost and Expense
 
Other Accounts
 
 
 
Deductions
 
Balance at December 31, 2015
Reserve for:
 

 
 

 
 

 
 

 
 

Doubtful accounts and returns
$
10

 
$
1

 
$
2

 
$

 
$
13

LIFO inventory
462

 
(166
)
 

 

 
296

Non-environmental asset retirement obligations
44

 
4

 

 
2

 
46

Environmental contingencies
345

 
9

 
11

 
29

 
336

Deferred tax valuation allowance
264

 
2

 
38

 
50

 
254

 
$
1,125

 
$
(150
)
 
$
51

 
$
81

 
$
945

 
 
 
Additions
 
 
 
 
 
Balance at January 1,
2014
 
Charges (Credits) to Cost and Expense
 
Other Accounts
 
 
 
Deductions
 
Balance at December 31, 2014
Reserve for:
 

 
 

 
 

 
 

 
 

Doubtful accounts and returns
$
12

 
$
1

 
$

 
$
3

 
$
10

LIFO inventory
506

 
(44
)
 

 

 
462

Non-environmental asset retirement obligations

 

 
44

 

 
44

Environmental contingencies
368

 
2

 
2

 
27

 
345

Deferred tax valuation allowance
204

 
(6
)
 
66

 

 
264

 
$
1,090

 
$
(47
)
 
$
112

 
$
30

 
$
1,125

(Dollars in millions)
 
 
Additions
 
 
 
 
 
Balance at January 1,
2013
 
Charges (Credits) to Cost and Expense
 
Other Accounts
 
 
 
Deductions
 
Balance at December 31, 2013
Reserve for:
 
 
 
 
 
 
 
 
 
Doubtful accounts and returns
$
8

 
$
5

 
$

 
$
1

 
$
12

LIFO inventory
505

 
1

 

 

 
506

Environmental contingencies
394

 
4

 
1

 
31

 
368

Deferred tax valuation allowance
215

 

 

 
11

 
204

 
$
1,122

 
$
10

 
$
1

 
$
43

 
$
1,090