Benefit Plans - Sirius XM Holdings Inc. Deferred Compensation Plan (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Retirement Benefits [Abstract]
Net withdrawals	$ (2)	$ (1)	$ (1)
Net contributions				$ 1
Fair value of investment assets related to deferred compensation plan	59		59		$ 53
Gains (losses) on investments	$ 2	$ (1)	$ 7	$ 4

Deferred Compensation Arrangement with Individual, Contributions by Employer, Net Of Withdrawals

No definition available.

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- Definition

Deferred Compensation Arrangement with Individual, Gain (Loss) on Investment

+ References

No definition available.

+ Details

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- References

No definition available.

+ Details

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- Definition

Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement.

+ References

No definition available.

+ Details

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- Definition

Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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