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CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2025
Apr. 30, 2024
Net income $ 215 $ 308 $ 533 $ 656
Other comprehensive income (loss):        
Unrealized gain (loss) on derivative instruments, net of tax expense (benefit) of $(4), $2, $(1) and $(1) (14) 7 (3) 0
Amount reclassified into earnings related to derivative instruments, net of tax expense (benefit) of $(1), $0, $(2) and $(1) (1) (1) (3) (3)
Foreign currency translation, net of tax expense (benefit) of $0, $0, $0 and $0 120 (24) 35 (3)
Net defined benefit pension cost and post retirement plan costs:        
Change in actuarial net gain (loss), net of tax expense (benefit) of $(2), $(1), $(2) and $(2) (4) (3) (4) (4)
Other comprehensive income (loss) 101 (21) 25 (10)
Total comprehensive income $ 316 $ 287 $ 558 $ 646