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INCOME TAXES - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions | Jul. 28, 2019 | Oct. 28, 2018 | Jul. 29, 2018
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UNRECOGNIZED TAX BENEFITS |  |  |
Unrecognized tax benefits | $ 630 | $ 279 |
Unrecognized tax benefits affecting effective tax rate if recognized | $ 274 | $ 128 | $ 137

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