Accrued Expenses and Other Liabilities (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accrued Expenses and Other Liabilities (Textual) (Abstract)
Benefit (charge) within operating expense	$ 4	$ (3)	$ 1

Amounts charged to earnings for developments in prior years self-insurance loss reserves.

No definition available.

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