Stockholders' Deficit - Schedule of Changes and Reclassifications Related to Other Comprehensive Income, Net of Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Jan. 31, 2020	Jan. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains arising during the period	$ 51
Gains reclassified into earnings	(34)
Other comprehensive income (loss), net of taxes	17	$ (242)
Change in unrealized gains (losses) on available-for-sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains arising during the period	1	0
Gains reclassified into earnings	0
Net unrealized gains (losses) on cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains arising during the period	44
Gains reclassified into earnings	(49)
Other comprehensive income (loss), net of taxes	(5)
Net unrealized gains (losses) on cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains arising during the period		(87)
Gains reclassified into earnings		(157)
Other comprehensive income (loss), net of taxes		(244)
Tax provision on amortization of actuarial loss and prior service benefit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains reclassified into earnings	15	8
Curtailments, settlements and other
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains reclassified into earnings	0	(1)
Change in unrealized components of defined benefit plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains arising during the period	0
Gains reclassified into earnings	15
Other comprehensive income (loss), net of taxes	15	7
Change in cumulative translation adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains arising during the period	6
Gains reclassified into earnings	0
Change in cumulative translation adjustment	$ 6	$ (5)

Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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