Common Stock Repurchases (Details) - USD ($) shares in Millions	3 Months Ended
Feb. 28, 2021	Feb. 29, 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)	0.4	0.4
Common stock repurchased and retired	$ 15,000,000	$ 20,000,000
Remaining authorized repurchase amount	$ 175,000,000.0

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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Balance Type:	debit
Period Type:	duration