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Accumulated Other Comprehensive Loss
6 Months Ended
Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss
A summary of changes in accumulated other comprehensive loss is as follows (in millions):
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
 
2016
 
2015
 
2016
 
2015
Unrealized loss on cash flow hedge
 
 
 
 
 
 
 
 
Beginning balance
 
$

 
$

 
$

 
$

Change in value of cash flow hedge, net of tax
 
(4
)
 

 
(4
)
 

Ending balance
 
(4
)
 

 
(4
)
 

Defined benefit plans, net
 
 
 
 
 
 
 
 
Beginning balance
 
(14
)
 
(10
)
 
(13
)
 
(11
)
Unrealized gain on subsidiary pension, net of tax
 
1

 

 

 
1

Ending balance
 
(13
)
 
(10
)
 
(13
)
 
(10
)
Foreign currency translation adjustment
 
 
 
 
 
 
 
 
Beginning balance
 
(938
)
 
(769
)
 
(1,091
)
 
(422
)
Translation (loss) income
 
(83
)
 
105

 
70

 
(242
)
Ending balance
 
(1,021
)
 
(664
)
 
(1,021
)
 
(664
)
Total accumulated other comprehensive loss
 
$
(1,038
)
 
$
(674
)
 
$
(1,038
)
 
$
(674
)