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SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract]  
SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS
SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS
(In millions)
 
Column A
 
Column B
 
Column C
 
Column D
 
Column E
Description
 
Balance at
Beginning
of Period
 
Additions
Charged
to Costs &
Expenses
 
Charged
to Other
Accounts
 
Deductions
 
Balance
at End of
Period
Allowance for doubtful accounts
 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2015**
 
$
19

 
$
5

 
$
—

 
$
2

 
$
22

Year ended December 31, 2014
 
$
18

 
$
3

 
$
—

 
$
2

 
$
19

Year ended December 31, 2013
 
$
18

 
$
1

 
$
—

 
$
1

 
$
18

Deferred tax valuation allowance
 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2015
 
$
20

 
$
5

 
$
—

 
$
—

 
$
25

Year ended December 31, 2014
 
$
13

 
$
7

 
$
—

 
$
—

 
$
20

Year ended December 31, 2013
 
$
9

 
$
4

 
$
—

 
$
—

 
$
13


** Above amounts include allowances classified as held for sale.