Environmental Matters (Details) $ in Millions	12 Months Ended
Dec. 31, 2016 USD ($) DisposalSite	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Environmental Remediation Obligations [Abstract]
Number of disposal sites \| DisposalSite	19
Environmental expenses	$ 10	$ 9	$ 7
Environmental liabilities	$ 9	$ 10

The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities. Also includes normal recurring expenses such as licensing, testing and waste disposal fees.

No definition available.

Name:	r_EnvironmentalExpenses
Namespace Prefix:	r_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration