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SEGMENT INFORMATION Reconciliation of Reportable Results (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Apr. 30, 2019
Apr. 30, 2018
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract]        
Total reportable operating segments' income from operations $ 185 $ 86 $ 306 $ 69
Share-based compensation expense (23) (15) (50) (34)
Restructuring Charges (6) (11) (6) (13)
Amortization of acquisition-related balances (54) (65) (108) (154)
Acquisition and integration costs 0 (17) (2) (36)
Northern California wildfire-related costs 0 0 0 (7)
Other 0 4 0 4
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
Operating Segments [Member]        
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract]        
Total reportable operating segments' income from operations 268 190 472 309
Income from operations $ 268 $ 190 $ 472 $ 309