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Stockholders’ Deficit - Schedule of Accumulated Other Comprehensive Loss, Net of Taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2016
Components of accumulated other comprehensive income, net of taxes      
Other comprehensive (loss) income before reclassifications $ 308    
Reclassifications of (gain) loss into earnings 265    
Net unrealized gain on available-for-sale securities      
Components of accumulated other comprehensive income, net of taxes      
Balance at beginning of period 12    
Other comprehensive (loss) income before reclassifications (2) $ 3 $ (2)
Reclassifications of (gain) loss into earnings (5) 0 0
Balance at end of period 5 12  
Net unrealized (loss) gain on cash flow hedges      
Components of accumulated other comprehensive income, net of taxes      
Balance at beginning of period (240)    
Other comprehensive (loss) income before reclassifications 299 (609) 231
Reclassifications of (gain) loss into earnings 232 183 $ 62
Balance at end of period 291 (240)  
Unrealized components of defined benefit plans      
Components of accumulated other comprehensive income, net of taxes      
Balance at beginning of period (1,190)    
Other comprehensive (loss) income before reclassifications 11    
Reclassifications of (gain) loss into earnings 38    
Balance at end of period (1,141) (1,190)  
Accumulated other comprehensive loss      
Components of accumulated other comprehensive income, net of taxes      
Balance at beginning of period (1,418)    
Balance at end of period $ (845) $ (1,418)