Stockholders' Equity - Changes and Reclassifications Related to Other Comprehensive Income (Loss), Net of Taxes (Details) - USD ($)
$ in Millions |
3 Months Ended |
6 Months Ended |
Apr. 30, 2018 |
Apr. 30, 2017 |
Apr. 30, 2018 |
Apr. 30, 2017 |
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
|
|
|
|
| Other comprehensive income, net of taxes |
$ 159
|
$ 1
|
$ 99
|
$ 476
|
| Net unrealized gains (losses) on available-for-sale securities |
|
|
|
|
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
|
|
|
|
| Other comprehensive income (loss) before reclassifications |
|
|
1
|
|
| Gains reclassified into earnings |
|
|
(9)
|
|
| Change in net unrealized (losses) gains on cash flow hedges |
|
|
|
|
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
|
|
|
|
| Other comprehensive income (loss) before reclassifications |
|
|
(85)
|
|
| Gains reclassified into earnings |
|
|
105
|
|
| Change in unrealized components of defined benefit plans |
|
|
|
|
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
|
|
|
|
| Other comprehensive income (loss) before reclassifications |
|
|
1
|
|
| Gains reclassified into earnings |
|
|
85
|
|
| Change in cumulative translation adjustment |
|
|
|
|
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
|
|
|
|
| Other comprehensive income (loss) before reclassifications |
|
|
1
|
|
| Gains reclassified into earnings |
|
|
0
|
|
| Reclassifications of gains (losses) into earnings | Net unrealized gains (losses) on available-for-sale securities |
|
|
|
|
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
|
|
|
|
| Other comprehensive income (loss) before reclassifications |
0
|
(4)
|
1
|
(18)
|
| Gains reclassified into earnings |
(17)
|
0
|
(9)
|
0
|
| Other comprehensive income, net of taxes |
(17)
|
(4)
|
(8)
|
(18)
|
| Reclassifications of gains (losses) into earnings | Change in net unrealized (losses) gains on cash flow hedges |
|
|
|
|
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
|
|
|
|
| Other comprehensive income (loss) before reclassifications |
71
|
8
|
(85)
|
113
|
| Gains reclassified into earnings |
79
|
(70)
|
105
|
(201)
|
| Other comprehensive income, net of taxes |
150
|
(62)
|
20
|
(88)
|
| Reclassifications of gains (losses) into earnings | Change in unrealized components of defined benefit plans |
|
|
|
|
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
|
|
|
|
| Other comprehensive income, net of taxes |
48
|
78
|
86
|
617
|
| Reclassifications of gains (losses) into earnings | Gains arising during the period |
|
|
|
|
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
|
|
|
|
| Gains reclassified into earnings |
0
|
10
|
1
|
465
|
| Reclassifications of gains (losses) into earnings | Amortization of actuarial loss and prior service benefit |
|
|
|
|
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
|
|
|
|
| Gains reclassified into earnings |
46
|
72
|
90
|
163
|
| Reclassifications of gains (losses) into earnings | Curtailments, settlements and other |
|
|
|
|
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
|
|
|
|
| Other comprehensive income, net of taxes |
2
|
(4)
|
(5)
|
(11)
|
| Reclassifications of gains (losses) into earnings | Change in cumulative translation adjustment |
|
|
|
|
| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
|
|
|
|
| Other comprehensive income, net of taxes |
$ (22)
|
$ (11)
|
$ 1
|
$ (35)
|