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Accrued Expenses and Other Liabilities (Details Textual) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Accrued Expenses and Other Liabilities (Textual) (Abstract) |  |  |
Benefit (charge) within operating expense | $ 1 | $ 4 | $ (3)

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- Details
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Namespace Prefix: | r_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amounts charged to earnings for developments in prior years self-insurance loss reserves. + References No definition available. + Details
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Namespace Prefix: | r_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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