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SEGMENT INFORMATION Reconciliation of Reportable Results (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2016
Reconcilitation between statement results and enterprise results [Abstract]      
Total reportable segment income from operations $ 1,122 $ 974 $ 859
Amortization (105) (117) (152)
Acquisition and integration costs (23) (30) (41)
Transformational initiatives (25) (12) (38)
Asset impairment charges 21 0 4
Business exit and divestiture costs (primarily our NMR business) (9) 0 (11)
Impairment of loans 0 0 (7)
NASD Site costs (8) 0 0
Pension curtailment gain 0 0 15
Pension settlement gain (5) (32) (1)
Special compliance costs (4) 0 0
Other (4) (6) (7)
Interest income 38 22 11
Interest Expense (75) (79) (72)
Other income (expense), net 55 19 (10)
Income before taxes 946 803 544
Pension Plan | U.S. Plan      
Reconcilitation between statement results and enterprise results [Abstract]      
Pension curtailment gain   15  
Pension settlement gain $ 0 $ 0 $ 0