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Stockholders' Equity - Additional Information (Detail) In Millions, unless otherwise specified | Dec. 31, 2012
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Shareholders Equity [Line Items] |
Maximum number of shares authorized to be repurchased | 11.4

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- Details
Name: | rhi_ShareholdersEquityLineItems
Namespace Prefix: | rhi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant