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Inventories, net
 12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]  
Inventories, net

4. Inventories, net

Inventories consist primarily of (in millions):

 

 

 

December 31,

 

 

 

2016

 

 

2015

 

 

2014

 

Finished goods and other

 

$

531

 

 

$

737

 

 

$

988

 

Less: inventory reserves

 

 

(48

)

 

 

(44

)

 

 

(39

)

Total

 

$

483

 

 

$

693

 

 

$

949

 

Inventory reserves:

 

 

 

 

 

 

 

 

 

 

 

 

Beginning balance

 

$

44

 

 

$

39

 

 

$

31

 

Additions charged to expenses

 

 

36

 

 

 

54

 

 

 

8

 

Charge-offs and other

 

 

(32

)

 

 

(49

)

 

 

—

 

Ending balance

 

$

48

 

 

$

44

 

 

$

39