Other Matters (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011
Other Matters (Textual) [Abstract]
Foreign tax (Brazil) assessed including penalties and interest	$ 16

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