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Supplemental Financial Information (Other Long-Term Liabilities) (Details) - USD ($)
$ in Millions
Jan. 31, 2021
Nov. 01, 2020
Other Liabilities, Noncurrent [Abstract]    
Unrecognized tax benefits $ 3,210 $ 3,185
Contract liabilities 735 823
Other (miscellaneous) 1,266 1,418
Total other long-term liabilities $ 5,211 $ 5,426