Goodwill and Intangible Assets Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2018
Goodwill [Line Items]
Goodwill	$ 1,646,933	$ 1,643,599	$ 1,642,170
Aggregate amortization expense	12,200	11,900	$ 12,100
Investment Banking and Capital Markets
Goodwill [Line Items]
Goodwill	$ 1,646,523	$ 1,640,201

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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