Revenues from Contracts with Customers (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
Feb. 29, 2020	Feb. 28, 2019	Nov. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue related to performance obligation satisfied	$ 6.4	$ 14.7
Revenue associated with distribution services, a portion of which related to prior period	5.6	4.9
Receivables related to revenue from contracts with customers	278.4		$ 263.7
Deferred revenue	15.5		12.8
Deferred revenue, revenue recognized	5.6	7.6
Capitalized contract cost	3.9		$ 4.8
Expenses related to capitalized costs to fulfill a contract	$ 1.9	$ 2.1

Contract With Customer, Revenue Related to Performance Obligations Satisfied in Previous Periods

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- Definition

Revenues Associated With Distribution Services

+ References

No definition available.

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- Definition

Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

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- Definition

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

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- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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- References

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