Employee Benefits Plans (Details 9) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Ryder Contributions	$ 10,099	$ 9,736	$ 8,837
Pension settlement charges (benefit)	5,454	7,650	(509)
Postretirement benefit income	56,833	61,215	41,704
Union-administered plans
Defined Benefit Plan Disclosure [Line Items]
Pension settlement charges (benefit)	$ 5,454	$ (139)	(509)
Western Conference Teamsters
Defined Benefit Plan Disclosure [Line Items]
Employer Identification Number	91-6145047
Pension Protection Act Zone Status	Green	Green
FIP/RP Status Pending/ Implemented	No
Ryder Contributions	$ 3,245	$ 2,613	2,430
Surcharge Imposed	No
Expiration Date(s) of Collective-Bargaining Agreement(s)	1/12/18 to 4/1/21
IAM National
Defined Benefit Plan Disclosure [Line Items]
Employer Identification Number	51-6031295
Pension Protection Act Zone Status	Green	Green
FIP/RP Status Pending/ Implemented	No
Ryder Contributions	$ 3,891	$ 4,162	3,801
Surcharge Imposed	No
Expiration Date(s) of Collective-Bargaining Agreement(s)	3/31/17 to 11/30/19
Automobile Mechanics Local No. 701
Defined Benefit Plan Disclosure [Line Items]
Employer Identification Number	36-6042061
Pension Protection Act Zone Status	Yellow	Yellow
FIP/RP Status Pending/ Implemented	RP Adopted
Ryder Contributions	$ 2,048	$ 2,201	1,902
Surcharge Imposed	Yes
Expiration Date(s) of Collective-Bargaining Agreement(s)	10/31/17 to 5/31/19
Central States Southeast and Southwest Areas
Defined Benefit Plan Disclosure [Line Items]
Employer Identification Number	36-6044243
Pension Protection Act Zone Status	Red	Red
FIP/RP Status Pending/ Implemented	RP Adopted
Ryder Contributions	$ 244	$ 259	254
Surcharge Imposed	Yes
Expiration Date(s) of Collective-Bargaining Agreement(s)	5/6/17 to 10/31/17
Other funds
Defined Benefit Plan Disclosure [Line Items]
Ryder Contributions	$ 671	$ 501	$ 450