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Accumulated Other Comprehensive Income (Loss) (Tables)
 9 Months Ended
Sep. 30, 2018
Equity [Abstract]  
Components of Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss are as follows (in millions): 

 

 

 

Foreign

 

 

 

Currency

 

 

 

Translation

 

 

 

Adjustments

 

Balance at December 31, 2017

 

$

(105

)

Other comprehensive loss

 

 

(15

)

Balance at September 30, 2018

 

$

(120

)