The number of former officers of the reporting entity against whom securities class action lawsuit is filed.

No definition available.

Name:	lrn_NumberOfFormerOfficersAgainstWhomLawsuitIsFiled
Namespace Prefix:	lrn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of former officers of the reporting entity who were dismissed as defendants in the lawsuit.

+ References

No definition available.

+ Details

Name:	lrn_NumberOfFormerOfficersDismissedAsDefendantsInLawsuit
Namespace Prefix:	lrn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of officers against whom securities class action lawsuit is filed.

+ References

No definition available.

+ Details

Name:	lrn_NumberOfOfficersAgainstWhomLawsuitIsFiled
Namespace Prefix:	lrn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationCaseAxis=lrn_BabulalTaraparaVsK12Inc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contingencies (Details) $ in Millions	Mar. 31, 2018 USD ($)	Oct. 02, 2017 item	Jul. 20, 2016 item
Buildings of Flex schools
Commitments and contingencies
Guarantees related to lease commitments \| $	$ 2.2
Babulal Tarapara Vs K12 Inc.
Commitments and contingencies
Number of officers against whom lawsuit is filed			2
Number of former officers against whom lawsuit is filed			1
Number of former officers who were dismissed as defendants in the lawsuit		2