SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ADVERTISING COSTS (Details)	12 Months Ended
Dec. 31, 2013
Marketing and Advertising Expense [Abstract]
Advertising Costs, Capitalized Direct Response, Advertising Amortization Period	2 years

Represents the period of amortization of direct-response advertising costs, which is the estimated period of benefit.

No definition available.

Name:	teg_AdvertisingCostsCapitalizedDirectResponseAdvertisingAmortizationPeriod
Namespace Prefix:	teg_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration