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Supplementary Financial Information - Other Accrued Liabilities (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 31, 2019
Nov. 01, 2018
Oct. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Other accrued taxes $ 919   $ 982
Warranty 675   673
Deferred revenue 1,180   1,095
Sales and marketing programs 3,020   2,758
Other 2,603   1,868
Other accrued liabilities 8,397 $ 7,873 7,376
Contract liabilities 2,000   $ 1,900
Revenues recognized $ 308