Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LitigationReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Commitments and Contingencies (Details) $ in Millions	3 Months Ended		9 Months Ended
Commitments and Contingencies (Details) $ in Millions	Feb. 29, 2020 USD ($)	Aug. 31, 2019 USD ($)	Feb. 29, 2020 USD ($) state	Feb. 28, 2019 state
Loss Contingencies [Line Items]
Settlement	$ 2.4	$ 1.5
Litigation accrued	$ 1.4		$ 1.4
Children's Book Publishing and Distribution
Loss Contingencies [Line Items]
Number of states in which sales tax remitted (in states) \| state			44	38