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Consolidated Statements of Stockholders' Equity (Parenthetical)
$ in Millions
Oct. 31, 2018
USD ($)
Stockholders' equity $ 21,274
Accumulated Other Comprehensive Loss  
Stockholders' equity (3,218)
Retained Earnings [Member]  
Stockholders' equity (5,899)
Cumulative Effect, Period of Adoption, Adjustment  
Stockholders' equity (2,181) [1]
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings [Member]  
Stockholders' equity (2,181) [1]
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2019-12  
Stockholders' equity (2,300)
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2014-09  
Stockholders' equity $ 124
[1] For fiscal 2019, includes $2.3 billion related to an addition to accumulated deficit as a result of the adoption of an accounting standard update for Income Taxes and $124 million related to a reduction to accumulated deficit as a result of the adoption of the new revenue accounting standard.