Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Derivative weighted average variable interest rate on hedge item.

+ References

No definition available.

+ Details

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

- Details

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Data Type:	xbrli:stringItemType
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Period Type:	duration

- Definition

Amount of the hedged item as of the balance sheet date related to the derivative. For example, the hedged balance on a debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date the entity entered into the derivative contract, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

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- Details

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Derivatives (Details) (USD $)	3 Months Ended
Derivatives (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Debt Instrument [Line Items]
Aggregate notional amount of interest rate swaps	$ 600,000,000invest_DerivativeNotionalAmount	$ 600,000,000invest_DerivativeNotionalAmount
Interest rate swaps maturing June 2017 [Member]
Debt Instrument [Line Items]
Issuance date	May 24, 2011
Maturity date	Jun. 01, 2017
Face value of medium-term notes	350,000,000
Aggregate notional amount of interest rate swaps	150,000,000
Fixed interest rate	3.50%
Weighted-average variable interest rate on hedged debt	1.42%		1.44%
Interest rate swaps maturing November 2018 [Member]
Debt Instrument [Line Items]
Issuance date	Nov. 12, 2013
Maturity date	Nov. 15, 2018
Face value of medium-term notes	300,000,000
Aggregate notional amount of interest rate swaps	100,000,000
Fixed interest rate	2.45%
Weighted-average variable interest rate on hedged debt	1.20%		1.19%
Interest rate swaps maturing June 2019 [Member]
Debt Instrument [Line Items]
Issuance date	Feb. 25, 2014
Maturity date	Jun. 01, 2019
Face value of medium-term notes	350,000,000
Aggregate notional amount of interest rate swaps	100,000,000
Fixed interest rate	2.55%
Weighted-average variable interest rate on hedged debt	1.13%		1.10%
Interest rate swaps maturing September 2019 [Member]
Debt Instrument [Line Items]
Issuance date	May 06, 2014
Maturity date	Sep. 03, 2019
Face value of medium-term notes	400,000,000
Aggregate notional amount of interest rate swaps	100,000,000
Fixed interest rate	2.45%
Weighted-average variable interest rate on hedged debt	0.89%		0.00%
Interest Rate Swaps Maturing March 2020 [Member]
Debt Instrument [Line Items]
Issuance date	Feb. 24, 2015
Maturity date	Mar. 02, 2020
Face value of medium-term notes	400,000,000
Aggregate notional amount of interest rate swaps	$ 150,000,000
Fixed interest rate	2.65%
Weighted-average variable interest rate on hedged debt	1.14%		0.00%