XML 33 R22.htm IDEA: XBRL DOCUMENT
v3.26.1

Stock-Based Compensation (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2026
Schedule of options granted and weighted average grant date fair value | ​
​ | ​ | ​ | ​ | ​ | ​
​ | Options | ​ | Weighted | ​
​ | granted | ​ | average | ​
​ | (000's) | ​ | GDFV | ​
Series C Liberty Formula One common stock, subsidiary employees (1) | 181 | ​ | $ | 26.40 | ​
| (1) | Grant vests equally over five years.
Series C common stock |
Schedule of outstanding options to purchase liberty common stock | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | ​ ​ ​ | ​ | ​ ​ ​ | Weighted | ​ ​ ​ | Aggregate | ​
​ | ​ | ​ | ​ | ​ | average | ​ | intrinsic | ​
​ | Options | ​ | ​ | ​ | remaining | ​ | value | ​
​ | (000's) | ​ | WAEP | ​ | life | ​ | (millions) | ​
Outstanding at January 1, 2026 | 3,534 | ​ | $ | 48.02 | ​ | ​ | ​ | ​ | ​ | ​ | ​
Granted | 181 | ​ | $ | 84.25 | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercised | (329) | ​ | $ | 31.89 | ​ | ​ | ​ | ​ | ​ | ​ | ​
Forfeited/Cancelled | — | ​ | $ | — | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at June 30, 2026 | 3,386 | ​ | $ | 51.53 | ​ | 2.4 | years | ​ | $ | 148 | ​
Exercisable at June 30, 2026 | 2,653 | ​ | $ | 41.52 |  | 1.4 | years | ​ | $ | 142 | ​

X
- Definition Schedule of outstanding options to purchase Liberty common stock [Text Block] + References No definition available. + Details
Name: | lmca_ScheduleOfOutstandingOptionsToPurchaseLibertyCommonStockTextBlock
Namespace Prefix: | lmca_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the weighted-average grant-date fair value of equity options or other equity instruments granted during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=lmca_LibertyFormulaOneGroupCommonClassCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |