Segment Information - Schedule of Segment Information (Parenthetical) (Detail)	6 Months Ended
Jun. 30, 2014
Segment Reporting [Abstract]
Internally allocated interest costs, pre tax rate	6.00%
Capital structure assumption, debt to equity ratio	50.00%

Internally allocated interest costs, pre tax rate.

No definition available.

Name:	te_InternallyAllocatedInterestCostsPreTaxRate
Namespace Prefix:	te_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration