Business combination, ownership percentage acquired by related party.

No definition available.

Name:	hssc_BusinessCombinationOwnershipPercentageAcquiredByRelatedParty
Namespace Prefix:	hssc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Related party transactions agreement automatic renewal period.

+ References

No definition available.

+ Details

Name:	hssc_RelatedPartyTransactionsAgreementAutomaticRenewalPeriod
Namespace Prefix:	hssc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Related party transactions agreement term.

+ References

No definition available.

+ Details

Name:	hssc_RelatedPartyTransactionsAgreementTerm
Namespace Prefix:	hssc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of owned satellites transferred.

+ References

No definition available.

+ Details

Name:	hssc_RelatedPartyTransactionsNumberOfOwnedSatellitesTransferred
Namespace Prefix:	hssc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

- Definition

Primarily represents commissions incurred in the period based upon the sale by commissioned employees or third parties of the entity's goods or services, and fees for sales assistance or product enhancements performed by third parties (such as a distributor or value added reseller).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

+ Details

Name:	us-gaap_SalesCommissionsAndFees
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_TypeOfArrangementAxis=hssc_SatelliteAndTrackingStockTransactionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_TypeOfArrangementAxis=hssc_HughesBroadbandMasterServicesAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=hssc_EchoStarAndHughesSatelliteSystemsCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_TypeOfArrangementAxis=hssc_ShareExchangeAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Related Party Transactions (Details 2) - DISH Network $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 02, 2014 USD ($) satellite	Mar. 31, 2017	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Feb. 28, 2017
Satellite And Tracking Stock Transaction
Related party transactions
Proceeds from issuance of Tracking Stock	$ 11.4
Hughes Broadband Master Services Agreement [Member]
Related party transactions
Agreement term		5 years
Automatic renewal period					1 year
Sales Commissions and Fees			$ 6.4	$ 10.9	$ 26.3	$ 15.6
EchoStar and HSSC \| Satellite And Tracking Stock Transaction
Related party transactions
Related Party Transactions Number of Owned Satellites Transferred \| satellite	5
EchoStar Technologies Business \| Share Exchange Agreement
Related party transactions
Ownership interest acquired by related party							100.00%