Other Matters (Details) (Brazil state operating tax [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014
Brazil state operating tax [Member]
Loss Contingencies [Line Items]
Tax amounts assessed but not reversed	$ 5

Amount of tax assessed but not reserved related to the sale of a business in prior year. This amount may include penalties and interest.

No definition available.

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