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Accounts Receivable - Narratives (Details) - USD ($) $ in Thousands | Oct. 27, 2018 | Jan. 28, 2018 | Jan. 27, 2018
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts Receivable, Net | $ 849,800 | $ 630,400 | $ 318,700
Accounts Receivable, Net, Current | 849,769 | 630,400 | $ 318,684
Adjustments for ASU 2014-09 | ASU 2014-09 |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts Receivable, Net, Current | $ 372,351 | $ 311,700 |

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