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v2.4.1.9

Agreement with SK hynix (Details) (USD $) In Millions, unless otherwise specified | 0 Months Ended | 1 Months Ended | 0 Months Ended |
--- | --- | --- | --- | ---
Jun. 11, 2013 | May 31, 2013 | Dec. 09, 2013 | Dec. 31, 2014
SK hynix |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Term of patent license agreement | 5 years |  |  |
Amount to be paid quarterly |  |  |  | $ 12.0 rmbs_LicenseAgreementFixedAmounttobePaidQuarterly / rmbs_AgreementNameAxis = rmbs_SKHynixMember
Future Receivables |  |  |  | 168.0 rmbs_SettlementAgreementFutureReceivables / rmbs_AgreementNameAxis = rmbs_SKHynixMember
Credit against settlement award |  | 250.0 rmbs_CreditAgainstCourtReward / rmbs_AgreementNameAxis = rmbs_SKHynixMember |  |
Micron |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Term of patent license agreement |  |  | 7 years |
Amount to be paid quarterly |  |  |  | 10.0 rmbs_LicenseAgreementFixedAmounttobePaidQuarterly / rmbs_AgreementNameAxis = rmbs_MicronAgreementMember
Future Receivables |  |  |  | $ 234.5 rmbs_SettlementAgreementFutureReceivables / rmbs_AgreementNameAxis = rmbs_MicronAgreementMember

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- Definition A credit against the court reward in a court ruling. + References No definition available. + Details
Name: | rmbs_CreditAgainstCourtReward
Namespace Prefix: | rmbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition License Agreement, Fixed Amount to be Paid Quarterly + References No definition available. + Details
Name: | rmbs_LicenseAgreementFixedAmounttobePaidQuarterly
Namespace Prefix: | rmbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition License Agreement, Term of Agreement + References No definition available. + Details
Name: | rmbs_LicenseAgreementTermofAgreement
Namespace Prefix: | rmbs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Settlement Agreement, Future Receivables + References No definition available. + Details
Name: | rmbs_SettlementAgreementFutureReceivables
Namespace Prefix: | rmbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | rmbs_AgreementNameAxis=rmbs_MicronAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | rmbs_AgreementNameAxis=rmbs_SKHynixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |