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Restructuring and Other Charges - Summary of Restructuring Plans (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016 | Oct. 31, 2018
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, beginning of period | $ 108 | $ 58 | $ 63 |
Charges | 99 | 227 | 175 |
Cash payments | (175) | (134) | (157) |
Non-cash and other adjustments | 27 | (43) | (23) |
Accrued Balance, end of period | 59 | 108 | 58 |
Total costs incurred to date |  |  |  | $ 1,651
Accrued Balance | 108 | 58 | 63 | 59
Other Accrued Liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 58 |  |  |
Accrued Balance | 58 |  |  | 58
Other non-current liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 1 |  |  |
Accrued Balance | 1 |  |  | 1
Fiscal 2017 Plan | Severance |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, beginning of period | 76 | 24 | 0 |
Charges | 112 | 117 | 24 |
Cash payments | (136) | (68) | 0 |
Non-cash and other adjustments | (2) | 3 | 0 |
Accrued Balance, end of period | 50 | 76 | 24 |
Total costs incurred to date |  |  |  | 253
Accrued Balance | 76 | 24 | 0 | 50
Fiscal 2017 Plan | Severance | Other Accrued Liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 50 |  |  |
Accrued Balance | 50 |  |  | 50
Fiscal 2017 Plan | Severance | Other non-current liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 0 |  |  |
Accrued Balance | 0 |  |  | 0
Fiscal 2017 Plan | Infrastructure and other |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, beginning of period | 19 | 0 | 0 |
Charges | (13) | 94 | 0 |
Cash payments | (35) | (23) | 0 |
Non-cash and other adjustments | 29 | (52) | 0 |
Accrued Balance, end of period | 0 | 19 | 0 |
Total costs incurred to date |  |  |  | 81
Accrued Balance | 19 | 0 | 0 | 0
Fiscal 2017 Plan | Infrastructure and other | Other Accrued Liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 0 |  |  |
Accrued Balance | 0 |  |  | 0
Fiscal 2017 Plan | Infrastructure and other | Other non-current liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 0 |  |  |
Accrued Balance | 0 |  |  | 0
Fiscal 2015 Plan | Infrastructure and other |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, beginning of period | 2 | 4 | 0 |
Charges | 0 | 0 | 27 |
Cash payments | (2) | (2) | (4) |
Non-cash and other adjustments | 0 | 0 | (19) |
Accrued Balance, end of period | 0 | 2 | 4 |
Total costs incurred to date |  |  |  | 27
Accrued Balance | 2 | 4 | 0 | 0
Fiscal 2015 Plan | Infrastructure and other | Other Accrued Liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 0 |  |  |
Accrued Balance | 0 |  |  | 0
Fiscal 2015 Plan | Infrastructure and other | Other non-current liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 0 |  |  |
Accrued Balance | 0 |  |  | 0
Fiscal 2015 Plan | Severance and PRP |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, beginning of period | 6 | 21 | 39 |
Charges | 0 | 15 | 117 |
Cash payments | (1) | (36) | (122) |
Non-cash and other adjustments | 0 | 6 | (13) |
Accrued Balance, end of period | 5 | 6 | 21 |
Total costs incurred to date |  |  |  | 171
Accrued Balance | 6 | 21 | 39 | 5
Fiscal 2015 Plan | Severance and PRP | Other Accrued Liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 5 |  |  |
Accrued Balance | 5 |  |  | 5
Fiscal 2015 Plan | Severance and PRP | Other non-current liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 0 |  |  |
Accrued Balance | 0 |  |  | 0
Fiscal 2012 Plan | Severance |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, beginning of period | 3 | 7 | 21 |
Charges | 0 | 1 | 7 |
Cash payments | (1) | (5) | (30) |
Non-cash and other adjustments | 0 | 0 | 9 |
Accrued Balance, end of period | 2 | 3 | 7 |
Total costs incurred to date |  |  |  | 1,075
Accrued Balance | 3 | 7 | 21 | 2
Fiscal 2012 Plan | Severance | Other Accrued Liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 2 |  |  |
Accrued Balance | 2 |  |  | 2
Fiscal 2012 Plan | Severance | Other non-current liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 0 |  |  |
Accrued Balance | 0 |  |  | 0
Fiscal 2012 Plan | Infrastructure and other |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, beginning of period | 2 | 2 | 3 |
Charges | 0 | 0 | 0 |
Cash payments | 0 | 0 | (1) |
Non-cash and other adjustments | 0 | 0 | 0 |
Accrued Balance, end of period | 2 | 2 | 2 |
Total costs incurred to date |  |  |  | 44
Accrued Balance | 2 | $ 2 | $ 3 | 2
Fiscal 2012 Plan | Infrastructure and other | Other Accrued Liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 1 |  |  |
Accrued Balance | 1 |  |  | 1
Fiscal 2012 Plan | Infrastructure and other | Other non-current liabilities |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Accrued Balance, end of period | 1 |  |  |
Accrued Balance | $ 1 |  |  | $ 1

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