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Accumulated Other Comprehensive (Loss) Income (Tables)
 3 Months Ended
Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
A summary of changes in accumulated other comprehensive (loss) income is as follows (in millions):
 
 
Three Months Ended March 31,
 
 
2015
 
2014
Defined benefit plans, net:
 
 
 
 
Balance at beginning of period
 
$
(11
)
 
$
3

Unrealized gain on subsidiary pension
 
1

 
—

Balance at end of period
 
(10
)
 
3

Foreign currency translation adjustment:
 
 
 
 
Balance at beginning of period
 
(422
)
 
8

Translation (loss) gain
 
(347
)
 
5

Balance at end of period
 
(769
)
 
13

Total accumulated other comprehensive (loss) income
 
$
(779
)
 
$
16