Postretirement Benefits (Discount Rates Used To Determine Net Cost) (Details) (U.S. Postretirement Benefit Plans [Member])	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
U.S. Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.40%	[1]	5.30%	5.40%

[1] Represents the weighted average rate for the IP plan for 2012 due to the remeasurement. The weighted average rate used for Temple-Inland in 2012 was 4.19%.