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NEW ACCOUNTING PRONOUNCEMENTS Effect of ASC 606 adoption on income statement (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 30, 2019 | Apr. 30, 2018 | Apr. 30, 2019 | Apr. 30, 2018 | Nov. 01, 2018 | Oct. 31, 2018
Net revenue: |  |  |  |  |  |
Revenues | $ 1,090 | $ 990 | $ 2,096 | $ 1,827 |  |
Costs and Expenses [Abstract] |  |  |  |  |  |
Cost of Goods and Services Sold | 442 | 451 | 870 | 863 |  |
Research and development | 171 | 160 | 344 | 310 |  |
Selling, general and administrative | 300 | 305 | 588 | 600 |  |
Other operating expense (income), net | (8) | (12) | (12) | (15) |  |
Total costs and expenses | 905 | 904 | 1,790 | 1,758 |  |
Income from operations | 185 | 86 | 306 | 69 |  |
Interest income | 6 | 2 | 10 | 5 |  |
Interest expense | (20) | (21) | (40) | (43) |  |
Other income (expense), net | 22 | 16 | 37 | 29 |  |
Income before taxes | 193 | 83 | 313 | 60 |  |
Provision for income taxes | 40 | 19 | 46 | (98) |  |
Net income | $ 153 | $ 64 | $ 267 | $ 158 |  |
Net income per share: |  |  |  |  |  |
Earnings Per Share, Basic | $ 0.81 | $ 0.34 | $ 1.42 | $ 0.84 |  |
Earnings Per Share, Diluted | $ 0.80 | $ 0.34 | $ 1.40 | $ 0.83 |  |
Assets: |  |  |  |  |  |
Accounts receivable, net | $ 660 |  | $ 660 |  | $ 631 | $ 624
Inventory | 660 |  | 660 |  |  | 619
Other current assets | 227 |  | 227 |  | 250 | 222
Long-term deferred tax assets | 727 |  | 727 |  | 735 | 750
Other assets | 317 |  | 317 |  | 282 | 279
Liabilities: |  |  |  |  |  |
Deferred revenue | 333 |  | 333 |  | 281 | 334
Income and other taxes payable | 61 |  | 61 |  | 43 | 42
Other accrued liabilities | 74 |  | 74 |  | 76 | 69
Long-term deferred revenue | 150 |  | 150 |  | 116 | 127
Other long-term liabilities | 251 |  | 251 |  | 290 | 287
Stockholders' equity: |  |  |  |  |  |
Retained earnings | 1,555 |  | 1,555 |  | 1,288 | 1,212
Calculated under Revenue Guidance in Effect before Topic 606 [Member] |  |  |  |  |  |
Net revenue: |  |  |  |  |  |
Revenues | 1,087 |  | 2,079 |  |  |
Costs and Expenses [Abstract] |  |  |  |  |  |
Cost of Goods and Services Sold | 442 |  | 869 |  |  |
Research and development | 171 |  | 344 |  |  |
Selling, general and administrative | 298 |  | 585 |  |  |
Other operating expense (income), net | (8) |  | (12) |  |  |
Total costs and expenses | 903 |  | 1,786 |  |  |
Income from operations | 184 |  | 293 |  |  |
Interest income | 6 |  | 10 |  |  |
Interest expense | (20) |  | (40) |  |  |
Other income (expense), net | 22 |  | 37 |  |  |
Income before taxes | 192 |  | 300 |  |  |
Provision for income taxes | 40 |  | 44 |  |  |
Net income | $ 152 |  | $ 256 |  |  |
Net income per share: |  |  |  |  |  |
Earnings Per Share, Basic | $ 0.81 |  | $ 1.36 |  |  |
Earnings Per Share, Diluted | $ 0.79 |  | $ 1.34 |  |  |
Assets: |  |  |  |  |  |
Accounts receivable, net | $ 652 |  | $ 652 |  |  | 624
Inventory | 661 |  | 661 |  |  |
Other current assets | 202 |  | 202 |  |  | 222
Long-term deferred tax assets | 744 |  | 744 |  |  | 750
Other assets | 314 |  | 314 |  |  | 279
Liabilities: |  |  |  |  |  |
Deferred revenue | 397 |  | 397 |  |  | 334
Income and other taxes payable | 60 |  | 60 |  |  | 42
Other accrued liabilities | 67 |  | 67 |  |  | 69
Long-term deferred revenue | 166 |  | 166 |  |  | 127
Other long-term liabilities | 248 |  | 248 |  |  | 287
Stockholders' equity: |  |  |  |  |  |
Retained earnings | 1,468 |  | 1,468 |  |  | $ 1,212
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |
Net revenue: |  |  |  |  |  |
Revenues | 3 |  | 17 |  |  |
Costs and Expenses [Abstract] |  |  |  |  |  |
Cost of Goods and Services Sold | 0 |  | 1 |  |  |
Research and development | 0 |  | 0 |  |  |
Selling, general and administrative | 2 |  | 3 |  |  |
Other operating expense (income), net | 0 |  | 0 |  |  |
Total costs and expenses | 2 |  | 4 |  |  |
Income from operations | 1 |  | 13 |  |  |
Interest income | 0 |  | 0 |  |  |
Interest expense | 0 |  | 0 |  |  |
Other income (expense), net | 0 |  | 0 |  |  |
Income before taxes | 1 |  | 13 |  |  |
Provision for income taxes | 0 |  | 2 |  |  |
Net income | $ 1 |  | $ 11 |  |  |
Net income per share: |  |  |  |  |  |
Earnings Per Share, Basic | $ 0 |  | $ 0.06 |  |  |
Earnings Per Share, Diluted | $ 0.01 |  | $ 0.06 |  |  |
Assets: |  |  |  |  |  |
Accounts receivable, net | $ 8 |  | $ 8 |  | 7 |
Inventory | (1) |  | (1) |  |  |
Other current assets | 25 |  | 25 |  | 28 |
Long-term deferred tax assets | (17) |  | (17) |  | (15) |
Other assets | 3 |  | 3 |  | 3 |
Liabilities: |  |  |  |  |  |
Deferred revenue | (64) |  | (64) |  | (53) |
Income and other taxes payable | 1 |  | 1 |  | 1 |
Other accrued liabilities | 7 |  | 7 |  | 7 |
Long-term deferred revenue | (16) |  | (16) |  | (11) |
Other long-term liabilities | 3 |  | 3 |  | 3 |
Stockholders' equity: |  |  |  |  |  |
Retained earnings | 87 |  | 87 |  | $ 76 |
Products |  |  |  |  |  |
Net revenue: |  |  |  |  |  |
Revenues | 911 | $ 830 | 1,748 | $ 1,514 |  |
Costs and Expenses [Abstract] |  |  |  |  |  |
Cost of Goods and Services Sold | 360 | 370 | 707 | 709 |  |
Products | Calculated under Revenue Guidance in Effect before Topic 606 [Member] |  |  |  |  |  |
Net revenue: |  |  |  |  |  |
Revenues | 903 |  | 1,725 |  |  |
Costs and Expenses [Abstract] |  |  |  |  |  |
Cost of Goods and Services Sold | 360 |  | 706 |  |  |
Products | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |
Net revenue: |  |  |  |  |  |
Revenues | 8 |  | 23 |  |  |
Costs and Expenses [Abstract] |  |  |  |  |  |
Cost of Goods and Services Sold | 0 |  | 1 |  |  |
Services and other |  |  |  |  |  |
Net revenue: |  |  |  |  |  |
Revenues | 179 | 160 | 348 | 313 |  |
Costs and Expenses [Abstract] |  |  |  |  |  |
Cost of Goods and Services Sold | 82 | $ 81 | 163 | $ 154 |  |
Services and other | Calculated under Revenue Guidance in Effect before Topic 606 [Member] |  |  |  |  |  |
Net revenue: |  |  |  |  |  |
Revenues | 184 |  | 354 |  |  |
Costs and Expenses [Abstract] |  |  |  |  |  |
Cost of Goods and Services Sold | 82 |  | 163 |  |  |
Services and other | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |
Net revenue: |  |  |  |  |  |
Revenues | (5) |  | (6) |  |  |
Costs and Expenses [Abstract] |  |  |  |  |  |
Cost of Goods and Services Sold | $ 0 |  | $ 0 |  |  |

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