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Data Breach - Schedule of Data Breach Balance Sheet Rollforward (Details) - Data Breach - USD ($)
$ in Millions
3 Months Ended
Apr. 30, 2016
May. 02, 2015
Liabilities    
Beginning balance $ 80 $ 171
Expenses incurred 0 3
Payments made / received (1) (7)
Ending balance 79 167
Insurance Receivable    
Beginning balance 20 60
Expenses incurred 0 0
Payments made / received (4) (5)
Ending balance $ 16 $ 55