Stockholders' Deficit - Accumulated Other Comprehensive Loss, Net of Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	$ (1,650)
Other comprehensive income (loss) before reclassifications	271
Reclassifications of losses into earnings	(27)
Balance at end of period	(2,328)
Accumulated other comprehensive loss
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	(260)
Balance at end of period	(16)
Net unrealized gains on available-for-sale debt securities
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	15
Other comprehensive income (loss) before reclassifications	(2)	$ 3
Reclassifications of losses into earnings	0
Balance at end of period	13
Net unrealized (losses) gains on cash flow hedges
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	19
Other comprehensive income (loss) before reclassifications	267	(319)
Reclassifications of losses into earnings	(32)	$ 45
Balance at end of period	254
Unrealized components of defined benefit plans
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	(323)
Other comprehensive income (loss) before reclassifications	15
Reclassifications of losses into earnings	5
Balance at end of period	(303)
Change in cumulative translation adjustment
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	29
Other comprehensive income (loss) before reclassifications	(9)
Reclassifications of losses into earnings	0
Balance at end of period	$ 20