- DefinitionDisclosure of components of a stock option or other award plan under which share-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from share-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from share-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. 0
| Name: |
lmca_TablePresentsNumberAndWeightedAverageExercisePriceWaepOfCertainOptionsAndSarsToPurchaseCommonStockGrantedToCertainOfficersEmployeesAndDirectorsOfCompany |
| Namespace Prefix: |
lmca_ |
| Data Type: |
nonnum:textBlockItemType |
| Balance Type: |
na |
| Period Type: |
duration |