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Common Stock Repurchases (Details) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2021	Aug. 31, 2020	Jan. 31, 2020	Nov. 30, 2019
Equity [Abstract]
Stock repurchase authorization					$ 250,000,000	$ 75,000,000
Common stock repurchased and retired (in shares)	0	0	800,000	400,000
Common stock repurchased and retired			$ 35,000,000	$ 20,000,000
Remaining authorized repurchase amount	$ 155,000,000		$ 155,000,000

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Number of shares that have been repurchased and retired during the period.

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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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