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Contingencies Schedule of FCPA Expenses (Tables)
 6 Months Ended
Jul. 31, 2017
Commitments and Contingencies Disclosure [Abstract]  
Foreign corrupt practices act expenses
For the three and six months ended July 31, 2017 and 2016, the Company incurred the following third-party expenses in connection with the FCPA investigation and related matters:
 
 
Three Months Ended July 31,
 
Six Months Ended July 31,
(Amounts in millions)
 
2017
 
2016
 
2017
 
2016
Ongoing inquiries and investigations
 
$
7

 
$
23

 
$
20

 
$
44

Global compliance program and organizational enhancements
 
5

 
5

 
8

 
9

Total
 
$
12

 
$
28

 
$
28

 
$
53