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Other Matters (Details) $ in Millions | Sep. 30, 2016 USD ($)
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Tax Year 1997 and 1998 [Member] | Brazil state operating tax [Member] |
Loss Contingencies [Line Items] |
Tax amounts assessed but not reserved | $ 4

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- Definition Tax Amounts Assessed in Prior Periods But Not Reserved + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=r_BrazilStateOperatingTaxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |