XML 15 R54.htm IDEA: XBRL DOCUMENT v3.2.0.727
Allowance for Doubtful Accounts (Tables)
 12 Months Ended
Dec. 31, 2014
Allowance for Doubtful Accounts [Abstract]  
Allowance for doubtful accounts
 
Balance at
beginning of year
 
Additions/
(releases)
charged to
costs and expenses
 
Deductions
/ Other movements
 
Foreign
exchange differences
 
Balance at
end of year
Description
 
 
 
 
 
 
 
 
 
 
(millions)
Year Ended December 31, 2014
 

 
 

 
 

 
 

 
 

Allowance for doubtful accounts
$
13

 
$
4

 
$
(6
)
 
$
1

 
$
12

Year Ended December 31, 2013
 

 
 

 
 

 
 

 
 

Allowance for doubtful accounts
$
14

 
$
3

 
$
(4
)
 
$
—

 
$
13

Year Ended December 31, 2012
 

 
 

 
 

 
 

 
 

Allowance for doubtful accounts
$
13

 
$
16

 
$
(15
)
 
$
—

 
$
14