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Retirement and Post-Retirement Benefit Plans - Narrative (Details) $ in Millions	6 Months Ended
	Apr. 30, 2021 USD ($)
Post-Retirement Benefit Plans
Retirement and post-retirement benefit plans
Anticipated contributions	$ 5
Contributions to benefit plans	2
Non-U.S. | Defined Benefit Plans
Retirement and post-retirement benefit plans
Anticipated contributions	77
Contributions to benefit plans	43
U.S. | Non-qualified plan
Retirement and post-retirement benefit plans
Anticipated contributions	34
Contributions to benefit plans	$ 15

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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