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Incentive Stock Plans - Summary of Additional Information for Stock Options (Details) (Stock Options [Member], USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Stock Options [Member]
      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Intrinsic value of options exercised $ 4.0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 [1] $ 12.3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 [1] $ 20.5us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 [1]
Fair value of options vested $ 3.1ryn_SharedBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 $ 2.6ryn_SharedBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 $ 3.3ryn_SharedBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
[1] Intrinsic value of options exercised is the amount by which the fair value of the stock on the exercise date exceeded the exercise price of the option.