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Stockholders' Deficit - Tax Effects Related to Other Comprehensive (Loss) Income (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Apr. 30, 2021
Apr. 30, 2020
Components of accumulated other comprehensive income, net of taxes        
Tax provision on other comprehensive income $ (41) $ (22) $ (9) $ (33)
Tax provision on unrealized gains arising during the period        
Components of accumulated other comprehensive income, net of taxes        
Tax effects on change arising during the period 0 0 (1) 0
Net unrealized (losses) gains on cash flow hedges        
Components of accumulated other comprehensive income, net of taxes        
Tax effects on change arising during the period (7) (33) 40 (49)
Tax effects on reclassification into earnings (17) 16 (21) 26
Tax provision on other comprehensive income (24) (17) 19 (23)
Tax provision on gains arising during the period        
Components of accumulated other comprehensive income, net of taxes        
Tax effects on change arising during the period (11) 0 (11) 0
Tax benefit on amortization of actuarial loss and prior service benefit        
Components of accumulated other comprehensive income, net of taxes        
Tax effects on reclassification into earnings (5) (5) (10) (10)
Unrealized components of defined benefit plans        
Components of accumulated other comprehensive income, net of taxes        
Tax provision on other comprehensive income (16) (5) (21) (10)
Change in cumulative translation adjustment        
Components of accumulated other comprehensive income, net of taxes        
Tax provision on other comprehensive income $ (1) $ 0 $ (6) $ 0