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

No definition available.

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Namespace Prefix:	lrn_
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- Definition

Number of leases in which the Company served as guarantor.

+ References

No definition available.

+ Details

Name:	lrn_NumberOfLeasesInWhichEntityServedAsGuarantor
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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=115931803&loc=d3e12069-110248

+ Details

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

- Definition

Amount awarded to other party in judgment or settlement of litigation.

+ References

No definition available.

+ Details

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

- 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

- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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- Details

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- Details

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- Details

Name:	srt_CounterpartyNameAxis=lrn_InsuranceCompanyMember
Namespace Prefix:
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Commitments and Contingencies (Details) $ in Millions		2 Months Ended
Commitments and Contingencies (Details) $ in Millions	Sep. 05, 2018 USD ($)	Sep. 15, 2016 item	Jun. 30, 2019 USD ($)	Jun. 30, 2018 lease	Jun. 30, 2017 lease
Commitments and contingencies
Number of leases in which the Company served as guarantor \| lease					2
Number of leases in which the Company served as guarantor defaulted \| lease				1
Buildings
Commitments and contingencies
Guarantees related to lease commitments \| $			$ 1.5
Babulal Tarapara v. 12 Inc. and Gil Tuinenburg v. K12 Inc. \| Pending Litigation
Commitments and contingencies
Number of securities class action lawsuits		2
Number of officers against whom lawsuit is filed		2
Number of former officers against whom lawsuit is filed		1
Babulal Tarapara v. 12 Inc. and Gil Tuinenburg v. K12 Inc. \| Settled Litigation \| Insurance company
Commitments and contingencies
Settlement payment \| $	$ 3.5