Fair Value Measurements and Concentrations of Credit Risk (Financial Assets Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions |
Feb. 02, 2019 |
Feb. 03, 2018 |
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| Marketable equity and debt securities | $ 101 | $ 117 |
| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | ||
| Marketable equity and debt securities | 27 | 25 |
| Significant Observable Inputs (Level 2) [Member] | ||
| Marketable equity and debt securities | 74 | 92 |
| Significant Unobservable Inputs (Level 3) [Member] | ||
| Marketable equity and debt securities | $ 0 | $ 0 |
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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