XML 122 R103.htm IDEA: XBRL DOCUMENT
v3.19.1

Capital Stock (Shares Repurchased) (Details) - USD ($) $ in Millions | 144 Months Ended |  |
--- | --- | --- | ---
May 23, 2019 | Feb. 02, 2016 | Feb. 01, 2016
Equity, Class of Treasury Stock [Line Items] |  |  |
Share repurchase plan, authorized amount |  | $ 468.0 | $ 300.0
Subsequent Event |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Aggregate cost of shares repurchased | $ 283.2 |  |
Share repurchase plan, remaining capacity | $ 184.7 |  |

X
- Definition Equity impact of the cost of common shares repurchased during the period. + References No definition available. + Details
Name: | lgfa_SharesRepurchasedDuringPeriodValue
Namespace Prefix: | lgfa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_EquityClassOfTreasuryStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |