Document And Entity Information - shares |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Apr. 30, 2018 |
|
| Entity Registrant Name | Liberty Media Corp | Ìý |
| Entity Central Index Key | 0001560385 | Ìý |
| Current Fiscal Year End Date | --12-31 | Ìý |
| Entity Current Reporting Status | Yes | Ìý |
| Entity Filer Category | Large Accelerated Filer | Ìý |
| Document Type | 10-Q | Ìý |
| Document Period End Date | Mar. 31, 2018 | Ìý |
| Document Fiscal Year Focus | 2018 | Ìý |
| Document Fiscal Period Focus | Q1 | Ìý |
| Amendment Flag | false | Ìý |
| Liberty Sirius XM Group Common Class A | Ìý | Ìý |
| Entity Common Stock, Shares Outstanding | Ìý | 102,726,696 |
| Liberty Sirius XM Group Common Class B | Ìý | Ìý |
| Entity Common Stock, Shares Outstanding | Ìý | 9,821,531 |
| Liberty Sirus XM Group Common Class C | Ìý | Ìý |
| Entity Common Stock, Shares Outstanding | Ìý | 221,304,724 |
| Liberty Braves Group Common Class A | Ìý | Ìý |
| Entit |