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SEGMENT INFORMATION - Reconciliation of Reportable Results (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Reconciliation of Operating Profit from Segments to Consolidated    
Total reportable segment's income from operations $ 311 $ 297
Transformational initiatives (13) (5)
Amortization of intangible assets related to business combinations (48) (28)
Acquisition and integration costs (13) (10)
NASD site costs 0 (2)
Other (22) (2)
Interest income 3 10
Interest expense (20) (18)
Other income (expense), net 21 6
Income before taxes, as reported $ 219 $ 248