Sirius XM Holdings Inc. Quarterly report pursuant to Section 13 or 15(d)

Business & Basis of Presentation (Details)

v3.19.3

Business & Basis of Presentation (Details) subscriber in Millions, active_user in Millions	9 Months Ended
	Sep. 30, 2019 active_user subscriber segment satellite_radio_system
Related Party Transaction [Line Items]
Number of reportable segments \| segment	2
Number of satellite radio systems \| satellite_radio_system	2
Equity Method Investee \| Sirius XM Canada
Related Party Transaction [Line Items]
Equity method investment, equity interest percentage	70.00%
Equity method investment, voting interest percentage	33.00%
Common Stock \| Management \| Liberty Media
Related Party Transaction [Line Items]
Related party ownership percentage	71.00%
Sirius XM
Related Party Transaction [Line Items]
Number of subscribers	34.6
Pandora
Related Party Transaction [Line Items]
Number of subscribers	6.3
Number of ad-supported active users \| active_user	63.1

- Definition

Equity method investment, voting interest.

+ References

No definition available.

+ Details

Name:	siri_EquityMethodInvestmentVotingInterest
Namespace Prefix:	siri_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Ad-Supported Active Users

+ References

No definition available.

+ Details

Name:	siri_NumberOfAdSupportedActiveUsers
Namespace Prefix:	siri_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of satellite radio systems.

+ References

No definition available.

+ Details

Name:	siri_NumberOfSatelliteRadioSystems
Namespace Prefix:	siri_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Subscribers

+ References

No definition available.

+ Details

Name:	siri_NumberOfSubscribers
Namespace Prefix:	siri_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Related party transaction related party ownership percentage.

+ References

No definition available.

+ Details

Name:	siri_RelatedPartyTransactionRelatedPartyOwnershipPercentage
Namespace Prefix:	siri_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- 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.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_EquityMethodInvesteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=siri_SiriusXMCanadaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_ManagementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=siri_LibertyMediaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=siri_SiriusXMMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=siri_PandoraMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: