Other Matters (Details) (Tax Year 1997 and 1998 [Member], Brazil state operating tax [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2015
Tax Year 1997 and 1998 [Member] \| Brazil state operating tax [Member]
Loss Contingencies [Line Items]
Tax amounts assessed but not reserved	$ 5

Tax Amounts Assessed in Prior Periods But Not Reserved

No definition available.

Name:	r_TaxAmountsAssessedinPriorPeriodsButNotReserved
Namespace Prefix:	r_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant