Represents the term of the agreement.

No definition available.

Name:	lrn_AgreementTerm
Namespace Prefix:	lrn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

Number of leases in which the Company served as guarantor defaulted.

+ References

No definition available.

+ Details

Name:	lrn_NumberOfLeasesInWhichEntityServedAsGuarantorDefaulted
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

Name:	us-gaap_GuaranteeObligationsMaximumExposure
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

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=lrn_ExecutiveChairmanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_EmploymentContractsMember
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:

- Details

Name:	us-gaap_LitigationCaseAxis=lrn_GilTuinenburgV.K12Inc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contingencies (Details) $ in Millions	9 Months Ended
Commitments and Contingencies (Details) $ in Millions	Mar. 31, 2017 USD ($) lease	Sep. 15, 2016 item	Jul. 20, 2016 item
Buildings of Flex schools
Commitments and contingencies
Guarantees related to lease commitments \| $	$ 1.8
Number of leases in which the Company served as guarantor defaulted \| lease	1
Employment agreement with Executive Chairman
Commitments and contingencies
Term of agreement	2 years
Employment agreement with CEO
Commitments and contingencies
Term of agreement	3 years
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
Gil Tuinenburg v. K12 Inc.
Commitments and contingencies
Number of officers against whom lawsuit is filed		2
Number of former officers against whom lawsuit is filed		1