Common Stock Repurchases (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended	9 Months Ended
Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018	Sep. 30, 2017
Equity [Abstract]
Common stock repurchased and retired (in shares)	0.5	0.7	2.6
Common stock repurchased and retired	$ 20,000	$ 25,000	$ 110,000
Stock repurchase authorization				$ 250,000
Remaining authorized repurchase amount		$ 75,000

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).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 210
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Publisher FASB
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Balance Type:	debit
Period Type:	duration