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Stock-Based Compensation, Stock Option Activity (Details) - Stock Options [Member] - USD ($) $ / shares in Units, $ in Millions	9 Months Ended	67 Months Ended
	Jan. 31, 2022	Oct. 31, 2021	Apr. 30, 2019
Stock Options [Abstract]
Awards granted (in shares)	290,000	0
Significant Assumptions Used in Fair Value Determination [Abstract]
Weighted average fair value of options on grant date (in dollars per share)	$ 11.72
Weighted Average Assumptions [Abstract]
Expected life of options (years)	6 years 3 months 18 days
Risk-free interest rate	1.20%
Expected volatility	30.70%
Expected dividend yield	2.40%
Fair value of common stock on grant date (in dollars per share)	$ 56.66
Exercise price of stock option grant (in dollars per share)	$ 62.18
Unrecognized share-based compensation expense remaining			$ 0
Maximum [Member]
Stock Options [Abstract]
Exercisable period	10 years
Vesting on April 30, 2022 [Member]
Stock Options [Abstract]
Award vesting percentage	10.00%
Vesting on April 30, 2023 [Member]
Stock Options [Abstract]
Award vesting percentage	20.00%
Vesting on April 30, 2024 [Member]
Stock Options [Abstract]
Award vesting percentage	30.00%
Vesting on April 30, 2025 [Member]
Stock Options [Abstract]
Award vesting percentage	40.00%

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Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award.

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