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Other Matters (Details) (Superstorm Sandy [Member], USD $) In Millions, unless otherwise specified | Dec. 31, 2012 | Oct. 28, 2012
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Superstorm Sandy [Member] |  |
Other Matters [Line Items] |  |
Storm damage liability incurred before tax |  | $ 8
Storm damage liability incurred after-tax |  | 5
Carrying value of storm damaged property expected to be recovered | $ 15.7 |

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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 Storm Damage, Carrying Value of Property Expected to be Recovered + References No definition available. + Details
Name: | r_StormDamageCarryingValueOfPropertyExpectedToBeRecovered
Namespace Prefix: | r_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Pre-tax charges incurred related to Superstorm Sandy + References No definition available. + Details
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Namespace Prefix: | r_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Storm Damage, Liability Incurred Net of Tax + References No definition available. + Details
Name: | r_StormDamageLiabilityIncurredNetOfTax
Namespace Prefix: | r_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant