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Accrued Expenses and Other Liabilities (Details Textual) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Accrued Liabilities and Other Liabilities [Abstract] |  |  |
Benefit (charge) within operating expense | $ (4) | $ 14 | $ 5

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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: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_AccruedLiabilitiesAndOtherLiabilitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration