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Commitments and Contingencies (Tables)
 6 Months Ended
Jul. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Loss Contingencies by Contingency
At July 31, 2016, accrued liabilities and insurance receivable related to the Data Breach consisted of the following (amounts in millions):
 
Accrued Liabilities
 
Insurance Receivable
Balance at January 31, 2016
$
(34
)
 
$
70

(Expenses incurred) insurance receivable recorded in the first quarter of fiscal 2016
(2
)
 
—

Payments made (received) in the first quarter of fiscal 2016
9

 
(15
)
Balance at May 1, 2016
$
(27
)
 
$
55

(Expenses incurred) insurance receivable recorded in the second quarter of fiscal 2016
(2
)
 
—

Payments made (received) in the second quarter of fiscal 2016
—

 
(10
)
Balance at July 31, 2016
$
(29
)
 
$
45