Represents the contracted capacity (in megawatts) from a variable interest entity under a power purchase agreement.

No definition available.

Name:	teg_ContractedCapacityFromVariableInterestEntity
Namespace Prefix:	teg_
Data Type:	num:powerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of compressed natural gas fueling stations sold by Integrys Transportation Fuels, LLC to AMP Trillium, LLC.

+ References

No definition available.

+ Details

Name:	teg_NumberOfCompressedNaturalGasFuelingStationsSold
Namespace Prefix:	teg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the obligations to purchase energy (in megawatts) from a variable interest entity under a power purchase agreement.

+ References

No definition available.

+ Details

Name:	teg_ObligationsToPurchaseEnergyUnderPowerPurchaseAgreement
Namespace Prefix:	teg_
Data Type:	num:powerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_VariableInterestEntityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 5A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=28200181&loc=SL6759159-111685

+ Details

Name:	us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

VARIABLE INTEREST ENTITIES (Details)	12 Months Ended	9 Months Ended			9 Months Ended
VARIABLE INTEREST ENTITIES (Details)	Dec. 31, 2013 UPPCO MW	Sep. 30, 2014 AMP Trillium LLC Co-venturer	Sep. 30, 2014 AMP Trillium LLC ITF	Nov. 01, 2014 AMP Trillium LLC ITF Subsequent event	Sep. 30, 2014 EVO Trillium LLC Co-venturer	Sep. 30, 2014 EVO Trillium LLC ITF
Variable interest entity
Variable interest entity ownership interest (as a percent)		70.00%	30.00%		85.00%	15.00%
Number of CNG fueling stations sold				8
Obligations to purchase energy under power purchase agreement (in megawatts)	0
Contracted capacity under a power purchase agreement (in megawatts)	17.5