Contingencies (Details) (USD $) In Millions, unless otherwise specified	Jan. 08, 2013 in	Dec. 31, 2013 Tredegar vs. 3M
Loss Contingencies [Line Items]
Minimum thickness of performance enhancing layer on films required to avoid antidumping duty order	0.00001
Estimated legal expenditures		$ 3

Minimum thickness of performance enhancing layer on films required to avoid antidumping duty order.

No definition available.

Name:	tg_MinimumThicknessOfPerformanceEnhancingLayerOnFilmsRequiredToAvoidAntidumpingDutyOrder
Namespace Prefix:	tg_
Data Type:	num:lengthItemType
Balance Type:	na
Period Type:	instant