XML 109 R85.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

Contingencies (Narrative) (Details) - Fiduciary Litigation $ in Millions		1 Months Ended	3 Months Ended	9 Months Ended
	Oct. 09, 2018 USD ($)	Aug. 30, 2016 class_action_complaint	Dec. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	Nov. 05, 2018 USD ($)
Loss Contingencies [Line Items]
Number of plaintiffs | class_action_complaint		7
Settlement payment amount	$ 92.5			$ 92.5
Insurance reimbursement, amount			$ 37.8	$ 37.8
Lawsuit for insurance reimbursement, amount					$ 10.0

X

- Definition

Amounts received in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy.

+ References

No definition available.

+ Details

Name:	lgfa_InsuranceReimbursementAmount
Namespace Prefix:	lgfa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Pursuant to a lawsuit filed by an insurer seeking declaratory judgment for reimbursement of its agreed upon payment, amount sought for reimbursement.

+ References

No definition available.

+ Details

Name:	lgfa_LawsuitforInsuranceReimbursementAmount
Namespace Prefix:	lgfa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- 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

X

- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

No definition available.

+ Details

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

X

- Details

Name:	srt_LitigationCaseAxis=lgfa_FiduciaryLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: