Current Maturities Classified as Long Term Debt

No definition available.

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

- Definition

Debt Instruments Purchase Price Percentage

+ References

No definition available.

+ Details

Name:	r_DebtInstrumentsPurchasePricePercentage
Namespace Prefix:	r_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt To Consolidated Net Worth Ratio

+ References

No definition available.

+ Details

Name:	r_DebtToConsolidatedNetWorthRatio
Namespace Prefix:	r_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount borrowed in letters of credit under the credit facility as of the balance-sheet date.

+ References

No definition available.

+ Details

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

- Definition

Represents the total amount of outstanding letters of credit and surety bonds, which primarily guarantee the payment of insurance claims.

+ References

No definition available.

+ Details

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

- Definition

Number of lending institutions.

+ References

No definition available.

+ Details

Name:	r_NumberOfLendingInstitutions
Namespace Prefix:	r_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Days Under Trade Receivables Purchase And Sale Program

+ References

No definition available.

+ Details

Name:	r_NumberofDaysUnderTradeReceivablesPurchaseAndSaleProgram
Namespace Prefix:	r_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Short-Term Debt Classified As Long-Term

+ References

No definition available.

+ Details

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

- Definition

Short-term maturity classified as long term debt

+ References

No definition available.

+ Details

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

- Definition

The maximum proceeds that may be received under the trade receivables purchase and sale program.

+ References

No definition available.

+ Details

Name:	r_TradeReceivablesProgramProceedsLimit
Namespace Prefix:	r_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of long-term unsecured obligations issued by corporations and other borrowers to investors (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommercialPaperNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611

+ Details

Name:	us-gaap_DebtInstrumentFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Indebtedness divided by net capital.

+ References

No definition available.

+ Details

Name:	us-gaap_RatioOfIndebtednessToNetCapital1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

The face amount of accounts receivable that will be sold to other entities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

+ Details

Name:	us-gaap_TradeReceivablesHeldForSaleAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=r_UsCommercialPaperLongTermMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=r_UnsecuredMediumTermNotesDueMarch2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=r_GlobalRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=r_UnsecuredMediumTermNotesDueJune2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=r_BankTermLoansDueMarch2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=r_TradeReceivablesProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=r_UnsecuredUsObligationsPrincipallyBankTermLoansLongTermMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DEBT (Details)	1 Months Ended	3 Months Ended
DEBT (Details)	Feb. 28, 2019 USD ($)	Mar. 31, 2019 USD ($) instution	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 1,400,000,000.0
Number of lending institutions \| instution		12
Annual facility fees, percentage		0.10%
Ratio of debt to consolidated net worth		3
Debt to consolidated tangible net worth ratio		197.00%
Line of credit remaining capacity		$ 572,000,000
Commercial paper classified as long term debt		800,000,000	$ 578,000,000
Short term maturities classified as long term debt		69,000,000
Short-term debt classified as long-term			50,000,000
Total available proceeds under trade receivables purchase and sale program		$ 225,000,000
Number of days under trade receivables purchase and sale program		364 days
Trade receivables borrowings		$ 0	200,000,000
Letters of credit and surety bonds outstanding		373,000,000	375,000,000
Fair value of total debt		6,570,000,000	5,970,000,000
U.S. commercial paper
Debt Instrument [Line Items]
Commercial paper classified as long term debt		695,272,000	454,397,000
Unsecured medium term notes due March 2024
Debt Instrument [Line Items]
Face amount of unsecured medium-term notes issued	$ 600,000,000
Global revolving credit facility
Debt Instrument [Line Items]
Current maturities classified as long-term debt		350,000,000
Unsecured medium term notes due June 2023
Debt Instrument [Line Items]
Debt repurchase price, percentage	101.00%
Bank term loans due March 2024
Debt Instrument [Line Items]
Face amount of unsecured medium-term notes issued		100,000,000
Trade receivables program
Debt Instrument [Line Items]
Trade receivables borrowings		0	200,000,000
Unsecured U.S. obligations
Debt Instrument [Line Items]
Current maturities classified as long-term debt			$ 250,000,000
Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		75,000,000
Letter of credit outstanding amount		$ 0
Minimum
Debt Instrument [Line Items]
Annual facility fees, percentage		0.075%
Maximum
Debt Instrument [Line Items]
Annual facility fees, percentage		0.20%