SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Real Estate (Details)	Dec. 31, 2019
Accounting Policies [Abstract]
Deposit required	5.00%

Revenue Recognition, Retail Estate Sales, Deposit Required

No definition available.

Name:	ryn_RevenueRecognitionRetailEstateSalesDepositRequired
Namespace Prefix:	ryn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant