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CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) - USD ($)
$ in Millions
 6 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Cash flows from operating activities:    
Net Income $ 267 $ 158
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation 48 53
Amortization 103 104
Share-based compensation 50 34
Deferred tax benefit (2) (237)
Excess and obsolete inventory-related charges 13 11
Gain on divestiture (1) (8)
Other non-cash expenses, net (2) 5
Changes in assets and liabilities:    
Accounts receivable (28) (31)
Inventory (53) (18)
Accounts payable 1 20
Employee compensation and benefits 5 23
Retirement and post-retirement benefits (23) (22)
Deferred Revenue 85 71
Income taxes payable (8) 125
Other assets and liabilities 6 (6)
Net cash provided by operating activities 461 282
Cash flows from investing activities:    
Investments in property, plant and equipment (60) (58)
Proceeds from sale of investments 7 0
Proceeds from divestiture 2 12
Other investing activities 2 0
Net cash used in investing activities (49) (46)
Cash flows from financing activities:    
Proceeds from issuance of common stock under employee stock plans 39 33
Payment of taxes related to net share settlement of equity awards (24) (16)
Payment of acquisition-related contingent consideration 0 (3)
Proceeds from credit facility 0 40
Repayment of debt and credit facility 0 (300)
Treasury stock repurchases (69) (28)
Net Cash used in financing activities (54) (274)
Effect of exchange rate movements 5 4
Net increase (decrease) in cash, cash equivalents, and restricted cash 363 (34)
Cash, cash equivalents, and restricted cash at beginning of period 917 820
Cash, cash equivalents, and restricted cash at end of period $ 1,280 $ 786