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Retirement Benefit Plans (Details) - Benefit Plans - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Apr. 30, 2025		Apr. 30, 2024	Apr. 30, 2025		Apr. 30, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost		$ 12		$ 12	$ 24		$ 24
Interest cost	[1]	89		102	178		203
Expected return on plan assets		(146)	[1]	(138)	(295)	[1]	(274)	[1]
Amortization and deferrals:
Actuarial loss	[1]	31		37	62		74
Prior service benefit	[1]	(1)		(2)	(2)		(4)
Net periodic benefit (credit) cost		(15)		11	(33)		23
Settlement loss and special termination benefits	[1]	3		1	3		2
Total net benefit (credit) cost		$ (12)		$ 12	$ (30)		$ 25
[1] These non-service components were included in Interest and other, net in the Condensed Consolidated Statements of Earnings.

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