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Summary of Significant Accounting Policies (Details) | 12 Months Ended
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Dec. 31, 2018 USD ($)
Accounting Policies [Abstract] |
Maximum amount of insurance risk of loss retained per occurrence | $ 3,000,000

X
- Definition The maximum amount of insurance risk of loss retained on a per occurrence basis under the company's vehicle liability, workers' compensation and other insurance programs. + References No definition available. + Details
Name: | r_MaximumAmountOfInsuranceRiskOfLossRetainedPerOccurrence
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_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration