SHARE-BASED COMPENSATION - Schedule of Stock Options Activity (Parenthetical) (Details) shares in Thousands	Dec. 31, 2020 shares
Stock options
Options
Number of options outstanding that have met the requisite service period and will be released as identified in the grant terms	147

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date and that have met the requisite service period and will be released as identified in the grant terms.

No definition available.

Name:	wy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRequisiteServicePeriodMetNumber
Namespace Prefix:	wy_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant