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Data Breach - Narrative (Details) $ in Millions | 3 Months Ended | 30 Months Ended
--- | --- | ---
Apr. 30, 2016 USD ($) action | May. 02, 2015 USD ($) | Apr. 30, 2016 USD ($)
Loss Contingencies [Line Items] |  |  |
Cumulative expenses incurred | $ 0 | $ 3 |
Data Breach |  |  |
Loss Contingencies [Line Items] |  |  |
Cumulative expenses incurred |  |  | $ 291
Expected insurance recoveries |  |  | 90
Net cumulative expense |  |  | $ 201
Data Breach | Canada |  |  |
Loss Contingencies [Line Items] |  |  |
Number of actions filed in court | action | 1 |  |

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- Details
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- Details
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