XML 27 R73.htm IDEA: XBRL DOCUMENT v2.4.1.9
JOINTLY OWNED UTILITY FACILITIES (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
MW
Weston 4  
Share of significant jointly owned electric generating facilities  
Ownership (as a percent) 70.00%us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_Weston4Member
Our share of rated capacity (in megawatts) 374.5wps_JointlyOwnedUtilityPlantProportionateOwnershipShareOfRatedCapacity
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_Weston4Member
Utility plant $ 581.9us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_Weston4Member
Accumulated depreciation (132.6)us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_Weston4Member
Construction work in progress 2.7us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_Weston4Member
Columbia Energy Center Units 1 and 2  
Share of significant jointly owned electric generating facilities  
Ownership (as a percent) 31.80%us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_ColumbiaEnergyCenterUnits1And2Member
Our share of rated capacity (in megawatts) 335.2wps_JointlyOwnedUtilityPlantProportionateOwnershipShareOfRatedCapacity
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_ColumbiaEnergyCenterUnits1And2Member
Utility plant 390.7us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_ColumbiaEnergyCenterUnits1And2Member
Accumulated depreciation (116.2)us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_ColumbiaEnergyCenterUnits1And2Member
Construction work in progress 10.1us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_ColumbiaEnergyCenterUnits1And2Member
Edgewater Unit 4  
Share of significant jointly owned electric generating facilities  
Ownership (as a percent) 31.80%us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_EdgewaterUnit4Member
Our share of rated capacity (in megawatts) 105.0wps_JointlyOwnedUtilityPlantProportionateOwnershipShareOfRatedCapacity
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_EdgewaterUnit4Member
Utility plant 42.9us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_EdgewaterUnit4Member
Accumulated depreciation (29.6)us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_EdgewaterUnit4Member
Construction work in progress $ 0.7us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress
/ us-gaap_JointlyOwnedUtilityPlantAxis
= wps_EdgewaterUnit4Member