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Information About Liberty's Operating Segments (Details) - item	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Live Nation
Information About Liberty's Operating Segments
Percentage included in segment reporting		100.00%
Live Nation | Maximum [Member]
Information About Liberty's Operating Segments
Percentage ownership		100.00%
SIRIUS XM Holdings
Information About Liberty's Operating Segments
Number of satellite systems	2
Formula 1
Information About Liberty's Operating Segments
Duration of World Championship	9 months
SIRIUS XM Holdings
Information About Liberty's Operating Segments
Number of complementary audio entertainment business	2

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- Definition

The length of time of the Motor race based World Championship competition.

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- Definition

The number of complementary audio entertainment businesses.

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- Definition

The number of proprietary satellite radio systems.

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- Definition

The percentage of amounts that are included in segment reporting.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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- 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.

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