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Financial Instruments (Tables)
 12 Months Ended
Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of a Summary of Foreign Exchange Contracts Gross Notional Values
The following is a summary of the primary hedging positions and corresponding fair values:

 
 
December 31, 2018
 
December 31, 2017
(in millions)
 
Gross
Notional
Value
 
Fair  Value
Asset
(Liability)(1)
 
Gross
Notional
Value
 
Fair  Value
Asset
(Liability)(1)
Currencies Hedged (Buy/Sell)
 
 
 
 
 
 
 
 
Philippine Peso/U.S. Dollar
 
$
53

 
$
—

 
$
62

 
$
—

Indian Rupee/U.S. Dollar
 
69

 
2

 
68

 
1

Mexican Peso/U.S. Dollar
 
8

 
—

 
9

 
—

All Other
 
37

 
—

 
21

 
—

Total Foreign Exchange Hedging
 
$
167

 
$
2

 
$
160

 
$
1

____________
(1)
Represents the net receivable (payable) amount included in the Consolidated Balance Sheet.