Summary of Significant Accounting Policies (Details)	12 Months Ended
Dec. 31, 2017 USD ($)
Accounting Policies [Abstract]
Maximum amount of insurance risk of loss retained per occurrence	$ 3,000,000

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.

No definition available.

Name:	r_MaximumAmountOfInsuranceRiskOfLossRetainedPerOccurrence
Namespace Prefix:	r_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration