CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Tax expense of actuarial gains	$ 8	$ 49	$ 21	$ 57
Tax benefit of prior service costs	$ 19	$ 0	$ 49	$ 1

Other Comprehensive Income Change In Net Actuarial Gain Loss Tax

No definition available.

Name:	wy_ChangesInUnamortizedNetPensionAndOtherPostretirementBenefitLossTaxExpenseBenefit
Namespace Prefix:	wy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration