ATC and INDU Solar Holdings LLC and WRPC [Member]
ATC, INDU Solar Holdings LLC, and WRPC
This element represents ATC, INDU Solar Holdings, LLC and WRPC.
Represents the combination of ATC and WRPC, the entity's significant equity method investments.
ATC and WRPC
ATC and WRPC [Member]
ATC INDU Solar Holdings LLC and WRPC [Member]
Represents the combination of ATC, Solar Holdings, LLC and WRPC, the entity's significant equity method investments.
ATC INDU Solar Holdings LLC and WRPC
This element represents ATC a for-profit, transmission only company. ATC owns, maintains, monitors, and operates electric transmission assets.
ATC
ATC [Member]
Accelerated Lease Costs and Depreciation Related to Restructuring Expense
This element represents the charge against earnings in the period associated with accelerated lease costs and accelerated depreciation related to restructuring by the entity.
Accelerated lease costs and depreciation
Accumulated Pension Costs [Member]
Changes to accumulated comprehensive income related to benefit plans, after tax.
SFAS 158 Pension Costs
Award Type [Axis]
Additional Amount Expensed after Reversal of Rulings
Additional amount expensed as a result of reversal of rulings
Additional amount expensed as component of margin as a result of reversal of rulings.
Adjustable First and Refunding Mortgage Series OO Bonds, Due 2037 [Member]
Bonds where the rate is adjusted, moving higher or lower according to changes in a specified reference rate.
Series OO bonds
Advertising Costs, Capitalized Direct Response, Advertising Amortization Period
Period of amortization of direct-response advertising costs over estimated period of benefit
Represents the period of amortization of direct-response advertising costs, which is the estimated period of benefit.
Over age 65
Represents the age 65 and older for medical benefits.
Age 65 and Older [Member]
Amendment Description
Age Criteria for Medical Benefits [Axis]
Represents the description of age for medical benefits.
Amendment Flag
Age for Medical Benefits [Domain]
Represents the description of age by group for medical benefits.
Aggregate Intrinsic Value [Abstract]
Aggregate Intrinsic Value
Allowance for Funds Used During Construction [Line Items]
Capitalized Interest and AFUDC
Allowance for Funds Used During Construction [Table]
Amount of Settlement Agreement
Settlement agreement amount
Amount of settlement agreement reached with the vendors.
Amount Refunded to Customers
Amounts refunded to customers
Amount refunded to customers.
Anticipated Additional Refunds Resulting from Favorable Rulings
Anticipated amount of additional refunds
Anticipated amount of additional refunds as a result of favorable rulings.
Approved Amount of Energy Efficiency Costs, Per Year
Approved amount of energy efficiency costs, per year
Approved Energy Efficiency Program, which allows to recover energy efficiency cost per year.
Approved Maximum Amount of Annual Deferral, Refund
Maximum annual deferral or refund
Maximum amount of annual deferral or refund in future rate proceedings.
Approved Period for Program
Approved period for the program
Period approved by the authorities for the program, expressed in years.
Approved Uncollectibles Expense Tracking Mechanism
Approved uncollectibles expense tracking mechanism (as a percent)
Maximum percentage of deferral and subsequent recovery or refund of the difference between actual write-offs and bad debt expense included in utility rates.
Asset Retirement Obligation, Additions and Revision of Estimate
Additions and revisions to estimated cash flows
Amount of the increase (decrease) in the amount of the asset retirement obligation during the current period for additions and changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.
This element represents details pertaining to derivative contracts entered into with buyer to offset the retained economic hedges associated with customer contracts sold.
Associated Northern Maine Retail Electric Sales Contracts
Associated Northern Maine Retail Electric Sales Contracts [Member]
Expenses Related to Electric Decoupling
Expenses related to electric decoupling
Represents the expenses related to electric decoupling amounts previously deferred for regulatory recovery at UPPCO.
Reversal of Expenses Related to Electric Decoupling
Reversal expenses related to electric decoupling
Represents the reversal of expenses related to electric decoupling amounts previously deferred for regulatory recovery at UPPCO.
Rate increase (decrease)
Authorized Rate Increase (Decrease) in Revenue
Represents the amount of increase (decrease) to existing rates.
Current Fiscal Year End Date
Reserve Related to Electric Decoupling
Reserve related to electric decoupling
Represents the reserve related to accrued expenses on electric decoupling amounts previously deferred for regulatory recovery at UPPCO.
Authorized Percent of Capital Structure Composed of Equity
The ratio of equity to total capitalization (debt plus equity) approved by the appropriate regulators.
Equity ratio percent
Number of Interveners Filed Appeals of Rate Order
Number of interveners that filed appeals of the rate order
Represents the number of interveners that filed appeals of the rate order.
Authorized Rate of Return on Common Equity
Percent return on equity
Rate of return on common equity approved by the appropriate regulators.
EPA Order Operation Permit Due to WP and L, Maximum Period
Maximum period over which operation permit would be due
Represents the maximum period over which operation permit would be due to WP&L.
Authorized Rate of Return on Common Equity in Previous Order
Represents the rate of return on common equity approved by the appropriate regulators in the previous rate order.
Authorized rate of return on common equity in the previous rate order (as a percent)
Average cost of shares in the rabbi trust (in dollars per share)
This element represents the average cost of shares held in an employee trust.
Average Cost of Shares Held in Employee Trust
Under age 65
Represents the age below 65 for medical benefits.
Before Age 65 [Member]
Weston and Pulliam Plants [Member]
Weston and Pulliam Plants
Represents the information pertaining to Weston and Pulliam Plants.
Billings Received During Transition Period
Billings received
Billings received during transition period.
Bonus Depreciation
Bonus depreciation resulting in increase in net deferred income tax liabilities (as a percent)
Represents the bonus depreciation available to the entity.
Document Period End Date
CANADA
Canada
Canadian Natural Gas and Wholesale Electric Marketing and Trading Portfolio [Member]
This element represents details pertaining to the sale of the remaining Canadian wholesale electric marketing and trading portfolio.
Canadian Natural Gas and Wholesale Electric Marketing and Trading Portfolio
Capital Transactions with Subsidiaries
Capital Transactions with Subsidiaries [Line Items]
Capital Transactions with Subsidiaries [Table]
Schedule itemizing capital transactions with subsidiaries.
Cash and Cash Equivalents and Cash Flow Supplemental Disclosures [Text Block]
CASH AND CASH EQUIVALENTS
The entire disclosure of cash and cash equivalents. This may include short term investments, maturity details, and supplemental disclosure to statement of cash flow.
Cash Dividend Paid to Parent Company
Dividends To Parent
This element represents disclosure of the total aggregate cash dividends paid to the entity by consolidated subsidiaries.
Cash Dividend Payment Restrictions
Cash dividend payment restrictions
Represents the cash dividend payment restrictions.
Cash Flow Hedge, Loss Deferred in Accumulated Other Comprehensive Income
The loss deferred in accumulated other comprehensive income related to cash flow hedges at the end of the period.
Loss on cash flow hedge deferred in accumulated OCI
Charge Transition Period
Transition period when charges paid
Transition period in months during which charges were paid by load-serving entities.
Entity [Domain]
Refund Remand Order Period
Period of remand order
Represents the period of remand order in which refund is issued.
Trial Basis Period
Trial basis period
Represents the trial basis period related to the approved decoupling mechanism.
Class action suit filed against PEC.
Class Action Peoples Energy Corporation (PEC)
Class Action PEC [Member]
Coal supply and transportation
Obligation related to coal supply and transportation.
Coal Supply and Transportation [Member]
Collateral Already Posted Cash
The amount of cash that is already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.
Collateral already satisfied, Cash
Collateral already satisfied, Letters of credit
The amount of letters of credit that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.
Collateral Already Posted, Letters of Credit
Columbia Energy Center Units 1 and 2
Represents Columbia Energy Center Units 1 and 2, a jointly owned utility facility of the entity.
Columbia Energy Center Units 1 and 2 [Member]
Columbia generation station air permit legal issues.
Columbia Title V Air Permit
Columbia Title V Air Permit [Member]
Commitments and Contingencies [Abstract]
Commitments and contingencies
Commodity Contract Coal [Member]
Coal contract
Derivative instrument whose primary underlying risk is tied to the commodity price of coal.
Electric contracts
Derivative instrument whose primary underlying risk is tied to the commodity price of electricity.
Commodity Contract Electric [Member]
FTRs
Derivative instrument whose primary underlying risk is tied to the commodity price of financial transmission rights.
Commodity Contract Financial Transmission Rights [Member]
Commodity Contract Natural Gas [Member]
Natural gas contracts
Derivative instrument whose primary underlying risk is tied to the commodity price of natural gas.
Petroleum product contracts
Derivative instrument whose primary underlying risk is tied to the commodity price of petroleum products.
Commodity Contract Petroleum Products [Member]
Guarantees supporting commodity transactions
Commodity Transactions Guarantee [Member]
This element represents details pertaining to guarantees for supporting commodity transactions of subsidiaries.
This element can be used to encapsulate the number, description, and reconciliation of common stock issued and outstanding. Discloses the methodology and assumptions used to compute basic and diluted earnings (loss) per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements. This element may also be used to disclose all or some of the information related to dividends, as of the financial reporting date.
Common Shareholders' Equity [Text Block]
COMMON EQUITY
Common Stock Issued Employee Stock Trust Shares
Number of shares of common stock issued during the period to a trust (for example, a 'rabbi trust') set up specifically to accumulate stock for the sole purpose of distribution to participating employees. This trust does not allow employees to immediately or after a holding period diversify into nonemployer securities. The deferred compensation plan for which this trust is set up must be settled by the delivery of a fixed number of shares of employer stock.
Shares issued - Rabbi trust Shares
Component of Other Income (Expense) Nonoperating [Axis]
Group that contains each detailed component of other nonoperating income and expenses.
Component of Other Income (Expense) Nonoperating [Line Items]
Components of miscellaneous income
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
AGREEMENT TO PURCHASE FOX ENERGY CENTER
Component of Other Income (Expense) Nonoperating Name [Domain]
Name of each detailed component of other nonoperating income and expenses.
Provides a description and the amount of each detailed component of other nonoperating income and expenses.
Component of Other Income (Expense) Nonoperating [Table]
COMPREHENSIVE INCOME.
Compressed Natural Gas Fueling Contract Assets [Member]
Compressed natural gas fueling contract assets
Represents the fair value of Trillium USA and Pinnacle CNG Systems compressed natural gas customer fueling contracts acquired by the reporting entity.
Condensed Consolidating Balance Sheet [Line Items]
BALANCE SHEETS
STATEMENTS OF CASH FLOWS
Condensed Consolidating Statements of Cash Flows [Line Items]
Condensed Consolidating Statements of Operations [Line Items]
STATEMENTS OF INCOME AND RETAINED EARNINGS
Represents the amounts recoverable from customers related to programs designed to meet energy efficiency standards.
Conservation program costs
Conservation Program Costs [Member]
Contingent Collateral Aggregate Fair Value
The aggregate fair value of assets needed to settle the instrument immediately if the credit-risk-related contingent features were triggered at the end of the reporting period. This includes derivatives, nonderivatives, normal purchases and normal sales contracts, and applicable payables and receivables.
Collateral that would have been required:
Corrective Actions Taken for Notice of Violations Issued
Number of corrective actions taken for NOV's received
The number of corrective actions that have been taken related to NOV's received.
Cost Recovery Limit, Number of Years
Cost recovery period of average rate charged to large industrial retail customers
Represents the number of years in the average rate charged to large industrial retail customers that is the limit for cost recovery.
Customer Owned Equipment Modifications [Member]
Customer-owned equipment modifications
Represents customer-owned equipment modifications which is an intangible asset of the entity.
Represents the regulatory asset arising from the purchase of the De Pere Energy Center, after which the capital lease obligation WPS had with De Pere was reversed and the difference between the capital lease asset and the purchase price was recorded as a regulatory asset.
De Pere Energy Center
De Pere Energy Center [Member]
Debt Instrument, Covenant Replacement Capital Percentage of Debt that May Not Bought Back
Percentage of notes that may not be bought back in excess of principal amount outstanding, under the replacement capital covenant (as a percent)
Percentage of the debt instrument that may not be bought back in excess of the principal amount outstanding under the replacement capital covenant.
Debt Instrument, Covenant Replacement Capital Period before Redemption or Repurchase of Debt above Maximum Percentage
Number of days prior to the allowable redemption or repurchase of more than 10% of the Notes under the replacement capital covenant if proceeds are from sale of similar qualifying securities
The period prior to the date of the redemption or repurchase of the debt instrument in which the redemption or repurchase may exceed the maximum percentage allowed under the replacement capital covenant if the specified amount of proceeds from the sale of qualifying securities have similar equity-like characteristics.
Debt Instrument, Expected Future Sinking Fund Amount
Sinking fund payment to be made on November 1, 2011
The amount to be paid in the future for a sinking fund payment related to outstanding debt.
Debt Instrument Interest Payment Deferral Option Number of Periods
Number of periods which can be deferred on Junior Subordinated Notes
Represents the number of periods for which interest payments on junior subordinated notes, can be deferred.
Cumulative period of interest payment deferral on Junior Subordinated Notes
Represents the number of years for which interest payments, on junior subordinated notes, of particular period can be deferred.
Debt Instrument Interest Payment Deferral Period
Represents the regulatory assets or liabilities arising from decoupling.
Decoupling
Decoupling [Member]
Deferred Compensation Arrangement with Individual Costs of Entity's Common Stock Held in Rabbi Trust
Total costs of the entity's common stock held in the rabbi trust
Represents the total costs of the entity's common stock held in the rabbi trust under the deferred compensation arrangement.
Deferred Compensation Arrangement with Individual Percentage of Compensation or Fees that Can be Deferred
Percentage of director fees that can be deferred by non employee directors
Represents the percentage of compensation or fees that can be deferred on a pre-tax basis under the deferred compensation plans.
Represents the deferred compensation trust and shares of an entity that have been repurchased by the entity. It also includes treasury stock that has no voting rights and receives no dividends.
Deferred Compensation Trust and Treasury Stock
Deferred Compensation Trust and Treasury Stock [Member]
2012 through 2017
Represents deferred tax assets expiring between 2012 and 2017.
Deferred Tax Assets Expiring Between 2012 and 2017
Deferred Tax Assets, Expiring between 2012 and 2029 [Abstract]
Deferred tax assets expiring between 2012 and 2029
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
2018 through 2023
Represents deferred tax assets expiring between 2018 and 2023.
Deferred Tax Assets Expiring Between 2018 and 2023
2024 through 2029
Represents deferred tax assets expiring between 2024 and 2029.
Deferred Tax Assets Expiring Between 2024 and 2029
Entity Well-known Seasoned Issuer
Price risk management
The tax effect as of the balance sheet date of the amount of the estimated future tax deductions attributable to hedging and derivative transactions which can only be deducted for tax purposes when losses from such transactions are realized, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.
Deferred Tax Assets Hedging and Derivative Transactions
Entity Voluntary Filers
Deferred Tax Assets, Tax Credit Carryforwards, Foreign Carryforward Period
Carryforward period of foreign tax credits
Represents the carryforward period of foreign tax credits.
Entity Current Reporting Status
Deferred Tax Assets, Tax Credit Carryforwards, General Business Carryforward Period
Carryforward period of general business tax credits
Represents the carryforward period of general business tax credits.
Entity Filer Category
Deferred Tax Assets, Tax Credit, Carryforwards State
Deferred tax credit carryforwards of state tax credits
The tax effect as of the balance sheet date of the amount of future tax effects arising from unused state tax credit carryforwards which will decrease future taxable income if applied in future years; a tax credit carryforward is the amount by which tax credits available for utilization exceeded statutory limits on inclusion in historical filings, and which can only be utilized if sufficient tax-basis income is generated in future periods and providing tax laws continue to allow such utilization.
Entity Public Float
Accounts Receivable, Related Parties, Current
Accounts receivable from related parties
Deferred Tax Assets, Tax Credit, Carryforwards State Carryforward Period
Represents the carryforward period of state tax credits.
Carryforward period of state tax credits
Entity Registrant Name
Deferred Tax Liabilities, Employee Benefits
Employee benefits
The cumulative amount of the estimated future tax effects attributable to employee benefits that were expensed for tax purposes but capitalized in conformity with generally accepted accounting principles, which will reverse in future periods.
Entity Central Index Key
Represents the amortization of the merger related regulatory adjustment of defined benefit plan costs.
Defined Benefit Plan, Amortization of Merger Related Regulatory Adjustment
Amortization of merger related regulatory adjustment
Defined Benefit Plan, Amortization of Net Gains (Losses) in Next Fiscal Year
Net actuarial losses
The amounts in accumulated other comprehensive income or net regulatory assets related to gains and losses that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.
Defined Benefit Plan, Amortization of Net Prior Service Cost Credit in Next Fiscal Year
Prior service costs (credits)
The amounts in accumulated other comprehensive income or net regulatory assets related to prior service cost or credit expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.
Defined Benefit Plan, Amortization of Net Transition Asset Obligation in Next Fiscal Year
Transition obligation
The amounts in accumulated other comprehensive income or net regulatory assets related to transition assets (obligations), origination from the adoption of FAS 87 and 106, expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.
Entity Common Stock, Shares Outstanding
Defined Benefit Plan, Amounts that will be Amortized in Next Fiscal Year [Abstract]
Estimated amounts that will be amortized as a component of net periodic benefit cost during the next fiscal year
The assumed medical cost trend rate used to determine benefit obligations. This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation Medical Cost Trend Rate
Assumed medical cost trend rate (as a percent)
Receivable Type [Axis]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation Ultimate Health Care Cost Trend Rate
Ultimate trend rate (as a percent)
The ultimate trend rate for health care costs which is used to determine benefit obligations.
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost Dental Cost Trend Rate
Assumed dental cost trend rate (as a percent)
The assumed dental cost trend rate which is used to determine net periodic benefit cost.
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost Medical Cost Trend Rate
Assumed medical cost trend rate (as a percent)
The assumed medical cost trend rate used to determine net periodic benefit cost. This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost Ultimate Health Care Cost Trend Rate
Ultimate trend rate (as a percent)
The ultimate trend rate for health care costs which is used to determine net periodic benefit cost.
Defined Benefit Plan, Assumptions Used Expected Long Term Return on Assets During Next Fiscal Year
An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested during next fiscal year.
Expected return on assets in next fiscal year (as a percent)
Defined Benefit Plan, Changes in Fair Value Recognition Period
Period of recognition of changes in realized and unrealized investment gains and losses
Represents the period of recognition of changes in the fair value of the defined benefit plans.
Defined Benefit Plan, Differences Between Actual Investment Returns and Expected Return on Plan Assets Recognition Period
Period of recognition of differences between actual investment returns and expected return on plan assets
Represents the period of recognition of differences between actual investment returns and the expected return on plan assets of the defined benefit plan.
401(h) other benefit plan assets invested as pension assets
Represents the pension trust assets that are used to pay other postretirement benefits as allowed under Internal Revenue Code Section 401(h).
Defined Benefit Plan, Fair Value of Plan Assets 401 (h) Other Benefit Plan Assets Invested as Pension Assets
Defined Benefit Plan, Fair Value of Plan Assets [Abstract]
Investments recorded at fair value, by asset class
Defined Benefit Plan, Fair Value of Plan Assets after 401 (h) Adjustment
Total
Plan assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date, after the adjustment for 401(h) other benefit plan assets invested as pension assets.
Ending balance
Defined Benefit Plan, Fair Value of Plan Assets before 401 (h) Adjustment
Fair value of plan assets before the adjustment for 401(h) other benefit plan assets invested as pension assets
Plan assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date, before the adjustment for 401(h) other benefit plan assets invested as pension assets.
Beginning balance
Total
The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as other items included in net regulatory assets associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.
Defined Benefit Plan, Net Regulatory Assets
Defined Benefit Plan, Net Regulatory Assets [Abstract]
Net regulatory assets
Defined Benefit Plan, Net Regulatory Assets, Merger Related Regulatory Adjustment
Merger related regulatory adjustment
The amount of merger related regulatory adjustment, which has not yet been recognized as components of net periodic benefit cost, and that are recognized as net regulatory assets.
The net amount of actuarial gains and losses, which has not yet been recognized as components of net periodic benefit cost, and that are recognized as net regulatory assets.
Defined Benefit Plan, Net Regulatory Assets, Net Actuarial Gains (Losses)
Net actuarial loss
Document Fiscal Year Focus
Defined Benefit Plan, Net Regulatory Assets, Prior Service Cost Credit
Prior service costs (credits)
The net amount of prior service cost or credit relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost, and that are recognized as net regulatory assets.
Document Fiscal Period Focus
Defined Benefit Plan, Net Regulatory Assets, Regulatory Deferral
Regulatory deferral
The amount of regulatory deferral, which has not yet been recognized as components of net periodic benefit cost, and that are recognized as net regulatory assets.
Defined Benefit Plan, Net Regulatory Assets, Transition Assets Obligations
Transition obligation
The net amount of transition obligation or asset, which has not yet been recognized as components of net periodic benefit cost, and that are recognized as net regulatory assets.
Defined Benefit Plan, Number of Non Contributory Qualified Plans
Number of non-contributory qualified pension plans covering substantially all employees
Represents the number of non-contributory qualified plans covering substantially all employees maintained by the entity and its subsidiaries.
Defined Benefit Plan, Regulatory Deferral
Regulatory deferral
This element represents the amortization of the regulatory deferral of defined benefit plan costs.
Defined Benefit Plan Transfers into Level 3
Transfers into Level 3
Represents transfers in of Level 3.
Represents transfers out of Level 3.
Defined Benefit Plan Transfers out of Level 3
Transfers out of Level 3
Period of recognition of transition obligation for other postretirement benefit plans that existed prior to the PEC merger
Represents the period of recognition of transition obligation of the defined benefit plan.
Defined Benefit Plan, Transition Obligation Recognition Period
Derivative Activity [Axis]
The grouping of types of activities for which the entity has derivative contracts.
Accounts payable to related parties
Accounts Payable, Related Parties, Current
Derivative Activity [Domain]
The types of activities for which the entity has derivative contracts.
Sum as of the balance sheet date of the (a) fair values of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and (b) the carrying amounts of the liabilities arising from financial instruments or contracts used to mitigate a specified risk (hedge), and which are expected to be extinguished or otherwise disposed of after a year or beyond the normal operating cycle, if longer.
Derivative Instruments and Hedges Liabilities, Gross, Noncurrent
Long-term Liabilities from Risk Management Activities
Liabilities from risk management activities
Legal Entity [Axis]
Derivative Instruments, Gain (Loss) Cash Flow Hedge
Gain (loss) reclassified to nonregulated revenue as hedged transactions occur from a cash flow hedge relationship that was dedesignated.
Gains (losses) recorded related to non-hedge derivatives
Document Type
Net gain (loss) from the increase (decrease) in fair value of derivative instrument not designated as hedging instrument. Also includes gain (loss) reclassified to nonregulated revenue as hedged transactions occur from a cash flow hedge relationship that was dedesignated.
Gains (losses) recorded related to non-hedge derivatives
Derivative Instruments Not Designated as Hedging Instruments, Cash Flow Hedge Gain (Loss), Net
Other transactions
Derivative contracts related to other transactions.
Derivative Other Transactions [Member]
Purchases
Derivative contracts related to purchases.
Derivative Purchases [Member]
Derivative Sales [Member]
Sales
Derivative contracts related to sales.
Derivatives
Most energy related physical and financial derivatives at the utilities qualify for regulatory deferral. These derivatives are marked to fair value; the resulting risk management assets are offset with regulatory liabilities or decreases to regulatory assets, and risk management liabilities are offset with regulatory assets or decreases to regulatory liabilities.
Derivatives [Member]
Derivatives Not Designated as Hedges Financial Statement Location [Axis]
The location and amount of gains and losses reported in the statement of financial performance or the statement of financial position.
Direct Response Advertising Disclosure [Text Block]
ADVERTISING COSTS
Represents the entire disclosure of capitalization of direct response advertising costs, amortization, and advertising expense.
Disposal Group, Derivative Instruments and Hedges Assets, Current
Current assets from risk management activities
Carrying amount as of the balance sheet date of the asset arising from derivative instruments and hedging activities, which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer, of a disposal group, including a component of the entity (discontinued operation), to be sold or that has subsequently been disposed of through sale, as of the financial statement date.
Long-term assets from risk management activities
For the disposal group, carrying amount of (a) fair values of assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, and (b) the carrying amounts of the assets arising from financial instruments or contracts used to mitigate a specified risk (hedge), and which are expected to be converted into cash or otherwise disposed of after a year or beyond the normal operating cycle, if longer.
Disposal Group, Derivative Instruments and Hedges Assets, Noncurrent
Disposal Group, Derivative Instruments and Hedges Liabilities, Current
Current liabilities from risk management activities
For the disposal group, carrying amount of (a) fair values of liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and (b) the carrying amounts of the liabilities arising from financial instruments or contracts used to mitigate a specified risk (hedge), and which are expected to be extinguished or otherwise disposed of within a year or the normal operating cycle, if longer.
Current Liabilities from Risk Management Activities
Disposal Group, Derivative Instruments and Hedges Liabilities, Noncurrent
Long-term liabilities from risk management activities
For the disposal group, carrying amount of (a) fair values of liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and (b) the carrying amounts of the liabilities arising from financial instruments or contracts used to mitigate a specified risk (hedge), and which are expected to be converted into cash or otherwise disposed of after a year or beyond the normal operating cycle, if longer.
Long-Term Liabilities from Risk Management Activities
Disposal Group, Including Discontinued Operation Asset, Retirement Obligations
Asset retirement obligations
For the disposal group, noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.
Disposal Groups, Financial Information, Disclosure of Risk Management Liabilities, Current
Current liabilities from risk management activities entered into related to the execution of third-party derivative contracts to offset the retained economic hedges associated with customer contracts sold.
Current liabilities from risk management activities
Disposal Groups, Financial Information, Disclosure of Risk Management Asset, Current
Current assets from risk management activities entered into related to the execution of third-party derivative contracts to offset the retained economic hedges associated with customer contracts sold.
Current assets from risk management activities
Noncurrent assets from risk management activities entered into related to the execution of third-party derivative contracts to offset the retained economic hedges associated with customer contracts sold.
Long-term assets from risk management activities
Disposal Groups, Financial Information, Disclosure of Risk Management Asset, Noncurrent
Noncurrent liabilities entered into from risk management activities related to the execution of third-party derivative contracts to offset the retained economic hedges associated with customer contracts sold.
Long-term liabilities from risk management activities
Disposal Groups, Financial Information, Disclosure of Risk Management Liabilities, Noncurrent
Disposal Groups, Financial Information Disclosure of Total Assets
Total assets from risk management activities entered into related to the execution of third-party derivative contracts to offset the retained economic hedges associated with customer contracts sold.
Total assets
Total liabilities from risk management activities entered into related to the execution of third-party derivative contracts to offset the retained economic hedges associated with customer contracts sold.
Total liabilities
Disposal Groups, Financial Information Disclosure of Total Liabilities
Dividend Payment Restrictions [Line Items]
Dividend Payment Restrictions
Represents debt to capitalization ratio required to be maintained.
Dividend Payment Restrictions Debt to Capitalization Ratio
Debt to capitalization ratio required to be maintained (as a percent)
Dividend Payment Restrictions Percentage of Common Stockholders Equity to Total Capitalization
Percentage of common stockholders equity to total capitalization for dividend payment restrictions
Represents the percentage of common stockholders equity to total capitalization for dividend payment restrictions.
Document and Entity Information
EPA Order Directed WDNR Resolve Objections within Period in Days
Number of days which the EPA directed WDNR to resolve renewal objection
Represents the period of time within which the EPA directed WDNR to resolve the EPA's objection to an air permit renewal, expressed in days.
EPA Review Period in Days
Represents the period of time within which the EPA reviewed the proposed air permit, expressed in days.
EPA Review Period in Days
Represents the information pertaining to EPA (Environmental Protection Agency) settlements with other utilities.
EPA Settlements with Other Utilities
EPA Settlements with Other Utilities [Member]
Edgewater Unit No. 4
Represents Edgewater Unit No. 4, a jointly owned utility facility of the entity.
Edgewater Unit Number 4 [Member]
Benefits and compensation (as a percent)
The portion of the difference between effective income tax rate and domestic federal statutory income tax rate attributable to benefits and compensation in accordance with generally accepted accounting principles and enacted tax laws.
Effective Income Tax Rate Reconciliation, Benefits and Compensation
Effective Income Tax Rate Reconciliation, Goodwill
Goodwill (as a percent)
The portion of the difference between effective income tax rate and domestic federal statutory income tax rate attributable to goodwill in accordance with generally accepted accounting principles and enacted tax laws.
Accounts Payable, Current
Accounts payable
Electric [Member]
Represents property, plant and equipment related to electric operations.
Electric
Accounts, Notes, Loans and Financing Receivable [Line Items]
SHORT-TERM NOTES RECEIVABLE - RELATED PARTIES
LONG-TERM NOTES RECEIVABLE - RELATED PARTIES
Electric Transmission Investment
Electric Transmission Investment [Member]
This element represents the Electric Transmission Investment segment of the entity.
Electric Utility [Member]
The Electric Utility segment includes the regulated electric utility operations of WPS and UPPCO.
Electric Utility
Emission allowances
Emission Allowances [Member]
This element represents emission allowances of the entity.
Employee Related Restructuring Expense
This element represents the charge against earnings in the period associated with employee-related costs resulting from restructuring by the entity.
Employee-related costs
Employee-related restructuring expense of the entity.
Employee-related restructuring expense
Employee Related Restructuring [Member]
Employee Service Share Based Compensation Tax Benefit Realized from Distribution of Shares
Tax benefit realized from the distribution of shares
Represents the aggregate tax benefit realized from the distribution of shares during the reporting period.
Electricity and natural gas supply
Committed obligation related to energy and natural gas supply contracts.
Energy and Natural Gas Supply [Member]
Represents the regulatory asset arising from energy costs receivable through rate adjustments.
Energy costs receivable through rate adjustments
Energy Costs Receivable Through Rate Adjustments [Member]
Represents the regulatory liabilities arising from energy costs refundable through rate adjustments.
Energy Costs Refundable Through Rate Adjustments [Member]
Energy costs refundable through rate adjustments
Energy Efficiency Program
Represents the amounts refundable to customers related to programs designed to meet energy efficiency standards.
Energy Efficiency Program [Member]
Energy Management Consulting Business
This element represents details pertaining to the sale of the energy management consulting business.
Energy Management Consulting Business [Member]
An agreement (contract) that contingently requires the guarantor to make payments to the guaranteed party in compensation for that party's or parties' loss or injury attributable to environmental issues. This element is a part of the residual section of other guarantees.
Environmental indemnification
Environment Indemnification Guarantee Other [Member]
Environmental Compliance Obligations [Abstract]
Environmental
Equity Contributions from Parent
Equity Contributions From Parent
Represents the equity contributions from parent.
Equity Method Investment, Summarized Financial Information, Long Term Debt
Long-term debt
The amount of long-term debt reported by an equity method investment of the entity.
Equity Method Investment Summarized Financial Information, Other Expenses
Other expense
This element represents other expenses of equity method investments which are not separately reflected.
Equity Method Investment, Summarized Financial Information Other Liabilities Noncurrent
Other noncurrent liabilities
The amount of noncurrent liabilities reported by an equity method investment of the entity.
Equity Method Investments, Number of Hydroelectric Plants Operated
Number of hydroelectric plants operated
Represents the number of hydroelectric plants operated.
Equity Method Investments, Portion of Energy Output Sold, Denominator
Portion of the energy output sold to WPS, denominator
Represents the portion of the energy output sold, denominator.
Equity Method Investments, Portion of Energy Output Sold, Numerator
Portion of the energy output sold to WPS, numerator
Represents the portion of the energy output sold, numerator.
Equity Method Investments, Remaining Portion of Energy Output Sold, Denominator
Represents the remaining portion of the energy output sold, denominator.
Remaining portion of the energy output sold to Wisconsin Power and Light, denominator
Equity Method Investments, Remaining Portion of Energy Output Sold, Numerator
Remaining portion of the energy output sold to Wisconsin Power and Light, numerator
Represents the remaining portion of the energy output sold, numerator.
Equity Method Investments [Roll Forward]
Changes in equity method investments
Roll forward of changes in balance of equity method investments for the period.
Estimated Environmental Capital Costs
Estimated capital cost to achieve required emission reduction
Represents estimated capital costs, including estimates for both wholly owned and jointly owned plants, to achieve the required level of reduction in mercury emissions.
Estimated Fuel Refund
Estimated fuel refund including carrying costs
Represents the estimated fuel refund including the carrying cost.
Annual Cap on Services under Decoupling Mechanism
Represents the annual cap under decoupling mechanism.
Annual cap on services
Recovery of Income Tax Amounts Previously Expensed
Represents the amount of recovery of income tax previously expensed due to the Federal Health Care Reform Act
Recovery of income tax amounts previously expensed due to the Federal Health Care Reform Act
Fair Value [Abstract]
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Table]
Schedule of the disclosure related to assets and liabilities by class, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis in periods after initial recognition. The disclosures that may be required or desired include: (a) the fair value measurements recorded during the period and (b) the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.
Roll forward of changes in the fair value of items categorized as Level 3 measurements for the period.
Fair Value, Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation Calculation
Fair Value, Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Changes in the fair value of items categorized as Level 3 measurements
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
Summarization of information required and determined to be provided for purposes of reconciling beginning and ending balances of fair value measurements of assets and liabilities using significant unobservable inputs (Level 3).
Fair Value, Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Table]
Fair Value, Assets and Liabilities Transfers Between the Levels of the Fair Value Hierarchy [Line Items]
Transfers between the levels of the fair value hierarchy
Line items represent transfers of assets or liabilities measured on a recurring basis between levels of the fair value hierarchy.
Fair Value Inputs Quantitative Information [Line Items]
Significant internally-developed unobservable inputs
Fair Value, Assets and Liabilities Transfers Between the Levels of the Fair Value, Hierarchy [Table]
Schedule of the transfers of assets and liabilities measured on a recurring basis between the levels of the fair value hierarchy.
Schedule of the inputs used in the fair value measurement. This disclosure may include, but is not limited to, the fair value, valuation technique used to measure the fair value, the inputs used to measure the fair value, the ranges of the inputs and the weighted averages of the inputs.
Fair Value Inputs Quantitative Information [Table]
Fair Value, Assets (Liabilities) Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Earnings
Net unrealized gains (losses) included in earnings related to instruments still held at the end of the period
This item represents the amount of the total change in unrealized (holding) gains or losses for the period which are included in the statement of income. Such unrealized (holding) gains or losses relate to those assets and liabilities still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3).
Fair Value Level 1 to Level 3 Transfers Amount
Transfers into Level 3 from Level 1
The amount of the transfers of assets or liabilities measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 3.
Fair Value, Level 2 to Level 3 Transfers, Amount
Transfers into Level 3 from Level 2
The amount of the transfers of assets or liabilities measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 3.
Fair Value, Level 3 to Level 1 Transfers, Amount
Transfers into Level 1 from Level 3
The amount of the transfers of assets or liabilities measured on a recurring basis out of Level 3 of the fair value hierarchy into Level 1.
The amount of the transfers of assets or liabilities measured on a recurring basis out of Level 3 of the fair value hierarchy into Level 2.
Transfers into Level 2 from Level 3
Fair Value, Level 3 to Level 2 Transfers, Amount
This element represents total gains or losses for the period (realized and unrealized), arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in earnings.
Fair Value, Measurement with Unobservable Inputs Reconciliation Recurring Basis, Asset and Liability Gain (Loss) Included in Earnings
Net realized and unrealized gains (losses) included in earnings
Fair Value, Measurement with Unobservable Inputs Reconciliation Recurring Basis, Asset and Liability Purchases
Purchases
This element represents purchases during the period of assets and liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.
Net purchases and settlements that have taken place during the period in relation to assets and liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.
Fair Value, Measurement with Unobservable Inputs, Reconciliation Recurring Basis Asset and Liability Purchases and Settlements
Net purchases and settlements
Fair Value, Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset and Liability, Sales
Sales
This element represents sales during the period of assets and liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.
Settlements
This element represents settlements during the period of assets and liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.
Fair Value, Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset and Liability, Settlements
Fair Value, Measurement with Unobservable Inputs, Reconciliation Recurring Basis Asset and Liability Transfers into Level 3
Net transfers into Level 3
This element represents the amount related to assets and liabilities measured at fair value and transferred into Level 3 of the fair value hierarchy during the period.
Fair Value, Measurement with Unobservable Inputs, Reconciliation Recurring Basis Asset and Liability Transfers, Net
Net transfers in/out of Level 3
This element represents the amount related to assets and liabilities measured at fair value and transferred into and out of Level 3 of the fair value hierarchy during the period.
Net transfers out of Level 3
This element represents the amount related to assets and liabilities measured at fair value and transferred out of Level 3 of the fair value hierarchy during the period.
Fair Value, Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset and Liability Transfers out of Level 3
Discontinued Operation Unrealized Income (Loss) from Discontinued Operation before Income Tax
Unrealized gains (losses) related to discontinued operations
Overall unrealized gain (loss) from a disposal group that is classified as a component of the entity, reported as a separate component of income before extraordinary items.
Fair Value, Measurement with Unobservable Inputs Reconciliation Recurring Basis, Asset and Liability Unrealized Losses Recorded as Regulatory Assets or Liabilities
Net unrealized (losses) gains recorded as regulatory assets or liabilities
This element represents total unrealized gains or losses for the period, arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are recorded as regulatory assets or liabilities.
Balance at the end of the period
This element represents assets and liabilities measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.
Balance at the beginning of the period
Fair Value, Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset and Liability Value
Represents the Federal Energy Regulatory Commission (FERC).
Federal Energy Regulatory Commission (FERC)
Federal Energy Regulatory Commission [Member]
EPA required financial assurance for Waukegan Coke plant remediation
Amount of financial assurance required by the Environmental Protection Agency for Waukegan Coke Plant site remediation.
Financial Assurance Required for Waukegan Coke Plant Site
Accrual for Environmental Loss Contingencies
Estimated and accrued future undiscounted investigation and cleanup costs for all sites
The income statement and balance sheet location of gains and losses on derivative instruments not designated as hedging instruments.
Financial Statement Location [Domain]
Finite Lived and Indefinite Lived Intangible Assets and Liabilities by Major Class [Axis]
This element represents the name of each major class of finite-lived and indefinite-lived intangible assets and liabilities by such attributes as gross and net carrying amount, accumulated amortization and weighted average useful life.
The major class of finite-lived and indefinite-lived intangible asset and liabilities.
Finite Lived and Indefinite Lived Intangible Assets and Liabilities by Major Class [Domain]
Finite Lived and Indefinite Lived Intangible Assets and Liabilities by Major Class [Table]
Disclosure of the carrying value of amortizable finite-lived intangible assets and liabilities, including disclosure of the carrying value of indefinite-lived intangible assets not subject to amortization, excluding goodwill, in total and by major class.
These concepts are used to disclose identifiable intangible assets other than goodwill associated with domain members defined in one or many axes to the table.
Finite Lived and Indefinite Lived Intangible Assets and Liabilities [Line Items]
Intangible assets other than goodwill
Unamortized intangible assets
Indefinite Lived Intangible Assets [Abstract]
First Mortgage Bonds M Series 5 Percent Bonds, Due 2028 [Member]
A contractual arrangement to borrow and repay an amount under first mortgage series M bonds at an interest rate of 5 percent, which is due in 2028.
First Mortgage Series M, 5.00% bonds due 2028
A contractual arrangement to borrow and repay an amount under first mortgage series N-2 bonds at an interest rate of 4.625 percent, which is due in 2013.
First Mortgage Series N-2, 4.625% bonds due 2013
First Mortgage Bonds N 2 Series 4.625 Percent Bonds, Due 2013 [Member]
First Mortgage Bonds O Series 7 Percent Bonds, Due 2013 [Member]
A contractual arrangement to borrow and repay an amount under first mortgage series O bonds at an interest rate of 7 percent, which is due in 2013.
First Mortgage Series O, 7.00% bonds due 2013
Fixed First and Refunding Mortgage KK Series 5 Percent Bonds, Due 2033 [Member]
A contractual arrangement to borrow and repay an amount under fixed first and refunding mortgage series KK bonds at an interest rate of 5 percent, which is due in 2033.
Fixed First and Refunding Mortgage Bonds, Series KK, 5.00% bonds due 2033
Fixed First and Refunding Mortgage NN 2 Series 4.625 Percent Bonds, Due 2013 [Member]
A contractual arrangement to borrow and repay an amount under fixed first and refunding mortgage series NN-2 bonds at an interest rate of 4.625 percent, which is due in 2013.
Fixed First and Refunding Mortgage Bonds, Series NN-2, 4.625% bonds due 2013
Fixed First and Refunding Mortgage QQ Series 4.875 Percent Bonds, Due 2038 [Member]
A contractual arrangement to borrow and repay an amount under fixed first and refunding mortgage series QQ bonds at an interest rate of 4.875 percent, adjustable after November 1, 2018, and is due in 2038.
Fixed First and Refunding Mortgage Bonds, Series QQ, 4.875% bonds due 2038
A contractual arrangement to borrow and repay an amount under fixed first and refunding mortgage series RR bonds at an interest rate of 4.3 percent, adjustable after June 1, 2016, and is due in 2035.
Fixed First and Refunding Mortgage Bonds, Series RR, 4.30% bonds due 2035
Fixed First and Refunding Mortgage RR Series 4.3 Percent Bonds, Due 2035 [Member]
Fixed First and Refunding Mortgage SS Series 7 Percent Bonds, Due 2013 [Member]
A contractual arrangement to borrow and repay an amount under fixed first and refunding mortgage series SS bonds at an interest rate of 7 percent, which is due in 2013.
Fixed First and Refunding Mortgage Bonds, Series SS, 7.00% bonds due 2013
A contractual arrangement to borrow and repay an amount under fixed first and refunding mortgage series TT bonds at an interest rate of 8 percent, which is due in 2018.
Fixed First and Refunding Mortgage Bonds, Series TT, 8.00% bonds due 2018
Fixed First and Refunding Mortgage TT Series 8 Percent Bonds, Due 2018 [Member]
Fixed First and Refunding Mortgage UU Series 4.63 Percent Bonds, Due 2019 [Member]
A contractual arrangement to borrow and repay an amount under fixed first and refunding mortgage series UU bonds at an interest rate of 4.63 percent, which is due in 2019.
Fixed First and Refunding Mortgage Bonds, Series UU, 4.63% bonds due 2019
Fixed First and Refunding Mortgage VV Series 2.125 Percent Bonds, Due 2030 [Member]
A contractual arrangement to borrow and repay an amount under fixed first and refunding mortgage series VV bonds, at an interest rate of 2.125 percent, a mandatory interest reset date on July 1, 2014, and is due in 2030.
Fixed First and Refunding Mortgage Bonds, Series VV, 2.125% bonds due 2030
Fixed First and Refunding Mortgage WW Series 2.625 Percent Bonds, Due 2033 [Member]
A contractual arrangement to borrow and repay an amount under fixed first and refunding mortgage series WW bonds, at an interest rate of 2.625 percent, a mandatory interest reset date on August 1, 2015, and is due in 2033.
Fixed First and Refunding Mortgage Bonds, Series WW, 2.625% bonds due 2033
Fixed First and Refunding Mortgage XX Series 2.21 Percent Bonds, Due 2016 [Member]
A contractual arrangement to borrow and repay an amount under fixed first and refunding mortgage series XX bonds at an interest rate of 2.21 percent, which is due in 2016.
Fixed First and Refunding Mortgage Bonds, Series XX, 2.21% bonds due 2016
Order making fuel cost over-collections subject to refund.
Fuel Cost Over-collections
Fuel Cost over Collections [Member]
Generation Businesses in New Brunswick Canada Northern Maine [Member]
This element represents details pertaining to the sale of generation business in New Brunswick, Canada and Northern Maine.
Generation Businesses in New Brunswick Canada and Northern Maine
Goodwill Impairment Loss after Tax
Noncash goodwill impairment loss after tax
Loss recognized during the period after tax that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill.
Guarantee Obligations by Type [Axis]
Pertinent information and amount of guarantee, by type of guarantee.
Guarantee Obligations by Type [Domain]
Represents a description of the type of guarantee or each group of similar guarantees.
Guarantee Obligations, Maximum Exposure, Expire Less than One Year
Guarantees expiring in less than 1 year
Represents the maximum potential payments with respect to the entity's guarantees that expire in less than a year.
Guarantee Obligations, Maximum Exposure, Expire over Five Years
Guarantees with expiration over 5 years from balance sheet date
Represents the maximum potential payments with respect to the entity's guarantees that expire after five years.
UNITED STATES
United States
Guarantee Obligations Maximum Exposure Expire over Three Years
Guarantees with expiration over 3 years from balance sheet date
Represents the maximum potential payments with respect to the entity's guarantees that expire after three years.
Guarantee Obligations, Maximum Exposure, Expire within Four to Five Years
Guarantees expiring within 4 to 5 years
Represents the maximum potential payments with respect to the entity's guarantees that expire within four to five years.
Guarantee Obligations, Maximum Exposure, Expire within One to Three Years
Guarantees expiring within 1 to 3 years
Represents the maximum potential payments with respect to the entity's guarantees that expire within one to three years.
Guarantee Obligations, Maximum Exposure, Related to Open Transactions
Guarantee exposure related to open transactions
Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions related to open transactions.
Holding Company and Other [Member]
This element represents the nonregulated operations of the holding company, along with any nonutility activities at the utilities and IBS. The operations of Integrys Transportation Fuels were also included in this segment.
Holding Company and Other
IBS and PEC [Member]
This element represents details pertaining to IBS and PEC.
IBS and PEC
IBS [Member]
This element represents details pertaining to Integrys Business Support, LLC, which is also referred to as IBS.
IBS
INDU Solar Holdings LLC [Member]
INDU Solar Holdings, LLC
Represents INDU Solar Holdings, LLC , which owns solar energy projects that deliver electricity to commercial, government and utility customers under long-term power purchase agreements.
Illinois Commerce Commission (ICC) - NSG
Illinois NSG [Member]
Represents the Illinois Commerce Commission (ICC) which regulates the operations of North Shore Gas Company (NSG).
Illinois PGL and NSG [Member]
Represents the Illinois Commerce Commission (ICC) which regulates the operations of The Peoples Gas Light and Coke Company (PGL) and the operations of North Shore Gas Company (NSG).
Illinois Commerce Commission (ICC) - PGL and Illinois Commerce Commission (ICC) - NSG
Represents the Illinois Commerce Commission (ICC) which regulates the operations of The Peoples Gas Light and Coke Company (PGL).
Illinois Commerce Commission (ICC) - PGL
Illinois PGL [Member]
IMPAIRMENT LOSSES ON PROPERTY, PLANT, AND EQUIPMENT
Impairment Losses of Property, Plant and Equipment [Text Block]
Represents the entire disclosure of impairment of property, plant and equipment.
IMPAIRMENT LOSSES ON PROPERTY, PLANT, AND EQUIPMENT
Impairment of Long Lived Assets Held For Use, Number of Natural Gas Fired Generation Plants
Number of natural gas-fired generation plants related to which impairment loss was recorded
Represents the number of natural gas-fired generation plants related to which an impairment loss was recorded by the entity.
Income (Loss) from Equity Method Investments in Excess of Dividends
Equity earnings (loss) in excess of dividends from subsidiaries
Represents the income (loss) from the equity method investments in excess of dividend income.
Income Tax Consolidated Return Inclusion Threshold
Threshold ownership percentage used to determine subsidiary inclusion in consolidated income tax return
Represents the ownership threshold used to determine whether subsidiaries are included in the entity's consolidated federal income tax return.
Income Tax Expense (Benefit), Net Operating Loss Carryforwards
Net operating loss carryforwards
The component of income tax expense for the period representing the change in net operating loss carryforwards.
Income Tax Expense (Benefit), Unrecognized Tax Benefits
Unrecognized tax benefits
The component of income tax expense for the period representing unrecognized tax benefits.
Accrued Income Taxes, Current
Accrued taxes
Income Tax, Investment Tax Credit, Policy [Text Block]
Change in Accounting Policy
Disclosure of accounting policy for investment tax credits.
The portion of the difference between total income tax expense or benefit as reported in the income statement and expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to benefits and compensation generated or utilized under enacted tax laws during the period.
Income Tax Reconciliation, Benefits and Compensation
Benefits and compensation
Income Tax Reconciliation, Deductions, Medicare Prescription Drug Benefit Subsidy, Additional Reversal
Deferred income taxes expensed for the Medicare Part D subsidy
The amount of deferred income tax benefits related to Medicare Part D subsidy that was expensed during the period.
Income Tax Reconciliation, Goodwill
Goodwill
The portion of the difference between total income tax expense or benefit as reported in the income statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to goodwill generated or utilized under enacted tax laws during the period.
Income Tax Reconciliation, Increase (Decrease) in Deferred Income Tax Expense (Benefit)
Deferred income taxes expensed for tax law changes
Represents the amount of deferred income taxes expensed in accounting for the Wisconsin and Michigan tax law changes.
Income Taxes Additional Disclosures [Abstract]
Income Taxes, additional disclosures
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Changes in accumulated other comprehensive loss
Roll forward of activity in accumulated other comprehensive loss for the period.
Increase (Decrease) in Deferred Income Taxes Change in Tax Rate
Increase in net deferred income tax liabilities from state tax law changes
The increase (decrease) during the reporting period in the account that represents the temporary difference that results from Income or Loss that is recognized for accounting purposes but not for tax purposes and vice versa attributable to changes in enacted tax laws.
The net change during the period in the amount of temporary LIFO liquidation credit.
Increase (Decrease) in Temporary LIFO Liquidation Credit
Temporary LIFO liquidation credit
Increase in nonregulated revenue due to exclusion of transaction costs from Integrys Energy Services' fair value estimates
Represents the increase in the nonregulated revenue due to the exclusion of transaction costs in the fair value estimates.
Increase in Nonregulated Revenue
An agreement (contract) that contingently requires the guarantor to make payments to the guaranteed party in compensation for that party's or parties' loss or injury attributable to specified events or actions. It also includes workers' compensation coverage.
Indemnification and workers' compensation coverage
Indemnification and Workers Compensation Guarantee Other [Member]
Insurance recoveries received
Insurance Recoveries Received
Insurance recoveries received.
Intangible Assets and Liabilities Excluding Goodwill, Gross
Total intangible assets, gross
Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all finite-lived and indefinite-lived intangible assets and liabilities having statutory or estimated useful lives.
Intangible Assets and Liabilities Excluding Goodwill, Net
Total intangible assets
The aggregate sum of gross carrying value of a major finite-lived and indefinite-lived intangible asset and liabilities class, less accumulated amortization and any impairment charges.
Integrys Energy Services is a diversified nonregulated retail energy supply and services company that primarily sells electricity and natural gas to commercial, industrial, and residential customers in deregulated markets. In addition, Integrys Energy Services invests in energy assets with renewable attributes.
Integrys Energy Services
Integrys Energy Services [Member]
Integrys Transportation Fuels LLC [Member]
ITF
Represents details pertaining to the legal entity, Integrys Transportation Fuels, LLC.
Interest Amount Refunded to Customers
Interest on refunded amount
Interest amount refunded to customers in addition to the actual refund amount.
Interest Paid Related Party
Cash paid for interest - related parties
The amount of cash paid for interest to related parties during the period.
Interest Payable Related Parties, Current
Interest payable to related parties
Represents the amount of interest payable to related parties.
Interest Receivable Related Parties, Current
Interest receivable from related parties
Amount of interest receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.
International equity
Represents the investment in international equity securities.
International Equity Securities [Member]
The interveners' testimony for rate proposals.
Intervener's testimony
Interveners Testimony [Member]
Investments in Subsidiaries
Total investments in subsidiaries, at equity
Represents the total investments in consolidated subsidiaries.
JOINTLY OWNED UTILITY FACILITIES
JOINTLY OWNED UTILITY FACILITIES
Represents the entire disclosure of proportionate interests in jointly owned utility plants.
Jointly Owned Utility Facilities [Text Block]
Jointly Owned Utility Plant, Proportionate Ownership Share of Rated Capacity
WPS's share of rated capacity (in megawatts)
The proportionate share of rated capacity in a jointly owned utility plant.
Key Executive Life Insurance Income [Member]
This element represents the income associated with key executive life insurance.
Key executive life insurance
Accrued Environmental Loss Contingencies, Noncurrent
Environmental remediation liabilities
This element represents interests held in LGS Renewables I, L.C. (LGS) by Integrys Energy Group's subsidiary, Integrys Energy Services.
LGS
LGS Renewables ILC [Member]
Landfill Gas to Electricity Facility [Member]
Represents the property, plant, and equipment related to a landfill gas to electricity facility.
Winnebago Energy Center
Liability of Refund to Customers
Recorded liability of refund to customers.
Balance of refund to customers, liability
Limitation Amount for Dividend Payment Restrictions
Limitation amount for dividend payment restrictions
Represents the limitation of amount for dividend payment restrictions.
Later years
Long Term Debt Related Parties Maturities Repayments of Principal after Year Five
Amount of long-term debt maturities payable to related parties after year five following the date of the latest balance sheet presented in the financial statements.
Long Term Notes 5.25 Percent Due 2011 [Member]
Long-term notes due 2011
A contractual arrangement to borrow and repay an amount under long-term notes at an interest rate of 5.25 percent, which is due in 2021.
Long Term Notes Due 2021 [Member]
Long-term notes due 2021
A contractual arrangement to borrow and repay an amount under long-term notes, which is due in 2021.
Less current portion
Long Term Notes Payable Related Parties, Current
Current portion of long-term notes payable to related parties
Represents the current portion of long-term notes payable to related parties.
Supply contract obligation amount
The amount of a long-term commitment to supply goods or services to one or more customers.
Long Term Supply Contracts Obligation, Amount
Long Term Supply Contracts Obligation, Amount Extended
Supply contract obligation amount, extending beyond 2013
The amount of a long-term commitment to supply goods or services to one or more customers which extends beyond a reported date.
Loss Contingency, Settlement Agreement, Consideration Amount
Settlement agreement amount for conservation and weatherization programs
The amount of consideration to which the entity agreed to pay in a settlement agreement which resolved the legal matter.
MERC [Member]
This element represents details pertaining to Minnesota Energy Resources Corporation, which is also referred to as MERC.
MERC
MGU [Member]
This element represents details pertaining to Michigan Gas Utilities Corporation, which is also referred to as MGU.
MGU
Remediation relating to manufacturing and storing manufactured gas
Manufactured Gas Plant Remediation
Manufactured Gas Plant Remediation [Member]
Percentage of Previous Period Dividend as Restriction on Current Period Dividends
Percentage of previous period's dividend as restriction on current period dividends
Represents the percentage of previous period's dividend as restriction on current period's dividends.
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax
Foreign currency translation
Mercury emission defined by the BACT rule.
Mercury emission
Mercury Emission [Member]
Represents the regulatory asset arising from merger and acquisition related pension and other postretirement benefit costs.
Merger and acquisition related pension and other postretirement benefit costs
Merger and Acquisition Related Pension and Other Postretirement Benefit Costs [Member]
Accumulated Defined Benefit Plans Adjustment [Member]
Defined Benefit Pension Plans
Represents the Michigan Public Service Commission (MPSC) which regulates the operations of Michigan Gas Utilities Corporation (MGU).
Michigan Public Service Commission (MPSC) - MGU
Michigan MGU [Member]
Represents the Michigan Public Service Commission (MPSC) which regulates the operations of Upper Peninsula Power Company (UPPCO).
Michigan Public Service Commission (MPSC) - UPPCO
Michigan UPPCO [Member]
Common Equity Ratio to be Maintained
Common equity ratio required to be maintained (as a percent)
Represents the common equity ratio which is required to be maintained.
Minnesota [Member]
Represents the Minnesota Public Utilities Commission (MPUC) which regulates the operations of Minnesota Energy Resources (MERC).
Minnesota Public Utilities Commission (MPUC)
NSG [Member]
This element represents details pertaining to North Shore Gas Company, which is also referred to as NSG.
NSG
Natural Gas [Member]
Represents property, plant and equipment related to natural gas operations.
Natural gas
Natural Gas Price Benchmark
Chicago city-gate natural gas price used in calculating replacement amounts (in dollars per dekatherm)
Represents the Chicago city-gate natural gas price used in calculating replacement amounts.
Natural gas supply and transportation
Committed obligation related to natural gas supply and transportation.
Natural Gas Supply and Transportation [Member]
Natural Gas Utility
Natural Gas Utility [Member]
The Natural Gas Utility segment includes the regulated natural gas utility operations of WPS, MGU, MERC, PGL, and NSG.
Available For Sale Securities
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Nature of Operations, Policy [Text Block]
Nature of Operations
Disclosure of the nature of operations.
Net Contributions from Noncontrolling Parties
Net contributions from noncontrolling parties
Represents the net increase in noncontrolling interest balance from contributions by noncontrolling parties.
Net income (loss) attributed to common shareholders
Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period) including portion attributable to noncontrolling interests.
Net Income (Loss) Available to Common Stockholders Including Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Member]
Net Regulatory Asset for Regulatory Tax Effects
Net regulatory asset for regulatory tax effects
Represents the net regulatory asset for regulatory tax effects as the regulated utilities are prospectively refunding taxes to or collecting taxes from customers for which deferred taxes were recorded in prior years at rates different than current rates.
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax
Defined Benefit Pension Plans
Nonregulated Cost of Sales
Nonregulated cost of sales
The amount of fuel, natural gas, purchased power and other cost of sales charged against earnings for the period related to nonregulated operations.
Nonregulated Easements [Member]
This element relates to easements supporting a natural gas pipeline.
Nonregulated easements
Nonregulated Revenue [Member]
Nonregulated revenue
The line item on the income statement for nonregulated revenue.
Nonregulated revenue (reclassified from accumulated OCI)
The line item on the income statement for nonregulated revenue reclassified from accumulated other comprehensive income.
Nonregulated Revenue Reclassified from AOCI [Member]
Nonutility and Nonregulated Operations [Member]
This element represents non-utility and non-regulated segments of the entity.
Nonregulated Segments
Nonutility and Nonregulated Operations
Nonutility plant
This element represents the nonutility activities of WPS, MGU, MERC, UPPCO, PGL, NSG, and IBS.
Nonutility Operation [Member]
Notes Receivable 3.35 Percent Due 2018 [Member]
3.35% Notes Receivable due 2018
Represents notes receivable at an interest rate of 3.35 percent which is due in 2018.
Notes Receivable 5.041 Percent Due 2020 [Member]
5.041% Notes Receivable due 2020
Represents notes receivable at an interest rate of 5.041 percent which is due in 2020.
Notes Receivable 5.25 Percent Due 2013 [Member]
5.25% Notes Receivable due 2013
Represents notes receivable at an interest rate of 5.25 percent which is due in 2013.
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax
Cash flow hedges
Notes Receivable 5.72 Percent Due 2013 [Member]
5.72% Notes Receivable due 2013
Represents notes receivable at an interest rate of 5.72 percent which is due in 2013.
Cash Flow Hedges.
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Notes Receivable 5.76 Percent Due 2016 [Member]
5.76% Notes Receivable due 2016
Represents notes receivable at an interest rate of 5.76 percent which is due in 2016.
Notes Receivable 5.98 Percent Due 2021 [Member]
5.98% Notes Receivable due 2021
Represents notes receivable at an interest rate of 5.98 percent which is due in 2021.
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated other comprehensive income (loss)
Accumulated other comprehensive loss
Notes Receivable 6.03 Percent Due 2013 [Member]
6.03% Notes Receivable due 2013
Represents notes receivable at an interest rate of 6.03 percent which is due in 2013.
Accumulated Deferred Investment Tax Credit
Deferred investment tax credits
Long-term deferred investment tax credits
Notes Receivable 6.059 Percent Due 2017 [Member]
6.059% Notes Receivable due 2017
Represents notes receivable at an interest rate of 6.059 percent which is due in 2017.
Notes Receivable 6.16 Percent Due 2016 [Member]
6.16% Notes Receivable due 2016
Represents notes receivable at an interest rate of 6.16 percent which is due in 2016.
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Property, plant, and equipment, accumulated depreciation (in dollars)
Less: Accumulated depreciation
Notes Receivable 6.40 Percent Due 2021 [Member]
6.40% Notes Receivable due 2021
Represents notes receivable at an interest rate of 6.40 percent which is due in 2021.
Notes Receivable 6.865 Percent Due 2014 [Member]
6.865% Notes Receivable due 2014
Represents notes receivable at an interest rate of 6.865 percent which is due in 2014.
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Accumulated other comprehensive loss
Accumulated other comprehensive loss, balance at beginning of period
Accumulated other comprehensive loss, balance at end of period
Notes Receivable 7.35 Percent Due 2016 [Member]
7.35% Notes Receivable due 2016
Represents notes receivable at an interest rate of 7.35 percent which is due in 2016.
Notes Receivable 8.76 Percent Due 2015 [Member]
8.76% Notes Receivable due 2015
Represents notes receivable at an interest rate of 8.76 percent which is due in 2015.
Notice of Violations Dismissed
Number NOV's dismissed
Represents the number of NOV's dismissed.
Notice of Violations Referred to State Justice Department
Number of NOV's referred to the state Justice Department
Represents the number of NOV's referred to the state Justice Department.
Number of Centralized Service Companies
Number of centralized service companies
Represents the number of centralized service companies.
Number of counterparty or industry that accounted for more than 10% of total credit risk exposure
Number of Counterparty or Industry Accounting for over Threshold for Disclosure Percentage
Represents the number of counterparties of industries that accounted for more than the threshold limit.
Period of Payables, Outstanding
Period of payables outstanding
Represents details pertaining to the period of payables outstanding.
Number of Issues Favorable Rulings
Favorable rulings, number of issues
Favorable rulings in number of issues.
Number of Nonregulated Compressed Natural Gas Fueling Companies
Number of nonregulated compressed natural gas fueling companies
Represents the number of nonregulated compressed natural gas fueling companies.
Number of Nonregulated Retail Energy Supply and Services Companies
Number of nonregulated retail energy supply and services companies
Represents the number of nonregulated retail energy supply and services companies.
Number of Notice of Violations for Clerical Error
Number of NOV's for clerical error received since 2008
The number of NOV's for a clerical error received since 2008.
Number of Notice of Violations of Air Permits
Number of NOV's alleging violations of the air permits received since 2008
The number of notice of violations (NOV) alleging various violations of the air permits received since 2008.
Number of Power Generation Businesses Sold
Number of power generation businesses sold
This element represents number of power generation business sold by the entity.
Number of Purchased Power Agreements that Reimburse Independent Power Producing Entity
Number of agreements that reimburse an independent power producing entity
Represents the number of purchased power agreements that reimburse an independent power producing entity for coal costs relating to purchased energy.
Number of Regulated Electric and or Natural Gas Utilities
Number of regulated electric and/or natural gas utilities
Represents the number of regulated electric and/or natural gas utilities.
Number of Remediation Sites
Number of environmental remediation sites
The number of sites for which the entity is responsible for environmental remediation.
Number of Remediation Sites Transferred to EPA Super Fund Alternative Sites Program
Number of environmental remediation sites transferred to the EPA Superfund Alternative Sites Program
Represents the number of sites that have been transferred to the EPA Superfund Alternative Sites Program.
Number of shares authorized for grant to single employee who is entity's chief executive officer or other three highest compensated officers of entity or its subsidiaries
Number of Shares Authorized, for Single Employee who is Chief Executive Officer of Entity and Three Highest Compensated Officers of Entity or its Subsidiaries
Maximum number of shares authorized for grant to single employee who is the entity's chief executive officer or other three highest compensated officers of entity or its subsidiaries under the equity-based compensation plan.
Number of States Included in CAIR Regulations
Number of states included in the CAIR regulation
Number of states included in the CAIR regulation.
Number of Transactions Entered into for Dispositions
Number of transactions entered into for dispositions
This element represents number of transactions entered into for a disposition.
Entity's Original Request
Original Request [Member]
The original request submitted to regulatory authorities for rate proposals.
Other commodities
Obligation related to other commodities.
Other Commodities [Member]
Other Equity Method Investee [Member]
Represents the other equity method investees of the entity.
Other;
Other Finite Lived Intangible Assets [Member]
This element represents other finite-lived intangible assets of the entity.
Other amortized intangible assets
Additional Paid in Capital, Common Stock
Additional paid-in capital
Other fixed income securities
Represents the investments in other fixed income securities that provides a return in the form of fixed periodic payments and eventual return of principal at maturity.
Other Fixed Income Securities [Member]
Other Nonoperating Income (Expense) Other [Member]
The net amount of other income and expense amounts, components of which are not separately disclosed in other nonoperating income or expense.
Other
Other.
Represents the other operations of the entity.
Other Operation [Member]
Represents the details pertaining to other regulatory assets.
Other
Other Regulatory Assets [Member]
Additional Paid in Capital
Additional paid-in capital
Other:
Represents the details pertaining to other regulatory liabilities.
Other Regulatory Liabilities [Member]
This element represents details pertaining to other wholesale natural gas storage contracts.
Other Wholesale Natural Gas Storage Contracts
Other Wholesale Natural Gas Storage Contracts [Member]
PEC [Member]
This element represents details pertaining to Peoples Energy Corporation, which is also referred to as PEC.
PEC
Additional Collateral, Aggregate Fair Value
Collateral remaining:
PELLC [Member]
This element represents details pertaining to Peoples Energy, LLC, which is also referred to as PELLC.
PELLC
PGL and NSG
PGL and NSG are wholly-owned subsidiaries of the entity.
PGL and NSG [Member]
Additional Paid In Capital
Additional Paid-in Capital [Member]
PGL [Member]
This element represents details pertaining to The Peoples Gas Light and Coke Company, which is also referred to as PGL.
PGL
PTI CNG Fuels LLC [Member]
PTI CNG Fuels LLC
Represents the interests held in PTI CNG Fuels LLC by the entity's subsidiary, Integrys Transportation Fuels, LLC.
AMP Trillium LLC
Represents the information pertaining to AMP Trillium LLC, a joint venture between Integrys Transportation Fuels, LLC (ITF) and AMP Americas LLC.
AMP Trillium LLC [Member]
Parental Guarantee [Member]
This element represents parental guarantees given by the entity to its subsidiaries.
Parental guarantees
Cash paid for transmission interconnection
Payments for Commissions Transmission Interconnection
The cash outflow associated with an interconnection agreement to fund the construction of transmission facilities.
Purchase of natural gas to repay natural gas loans
Payments for Purchase of Natural Gas to Repay Natural Gas Loans
The cash outflow associated with purchased natural gas for repayment of natural gas loans.
Payments made on derivative contracts related to divestitures classified as financing activities
The cash outflow made to buyers for out-of-the-money derivative transactions executed at the time of sale. These contracts were replacement supply trades for the retained retail operations and were transacted at the original transfer price between the wholesale and retail business.
Payments from Derivative Contracts Related to Divestiture
Peoples Energy Production Company
This element represents details pertaining to the sale of Peoples Energy Production Company.
Peoples Energy Production Company [Member]
Percentage Emission Reduction Required in Second Phase
Percentage reduction in emission required under second phase of CAIR (as a percent)
Represents the percentage reduction in emission required under the second phase of CAIR.
Percentage of Counterparties Transferred in Transaction
Percentage of counterparties transferred in the transaction
This element represents the percentage Of counterparties transferred in the transaction.
Percentage of Price Variance from Cost of Fuel and Purchased Power
Percentage of price variance from the cost of fuel and purchased power included in rates
Represents the percentage of price variance from the cost of fuel and purchased power included in rates.
Percentage of Retail Jurisdictional Construction Work In Progress Expenditure Subject to Public Utilities Allowance for Funds Used During Construction Calculation
Percentage of retail jurisdictional construction work in progress expenditures subject to AFUDC calculation
Represents the percentage of retail jurisdictional construction work in progress expenditures subject to the AFUDC calculation.
Percentage rate increase (decrease) (as a percent)
The percentage of increase (decrease) to existing rates.
Percentage Rate Increase (Decrease)
Performance stock rights and restricted stock
Represents information pertaining Performance Stock Rights and Restricted Stock Member.
Performance Stock Rights and Restricted Stock [Member]
Performance Stock Rights Equity Awards [Member]
Performance Stock Rights accounted for as Equity awards
Represents information pertaining to performance based equity awards.
Performance Stock Rights Liability Award [Member]
Performance Stock Rights accounted as Liability awards
Represents information pertaining to performance based liability awards.
An arrangement whereby an employee is entitled to receive in the future, a number of shares in the entity as determined by a calculation based on the company's performance over a set period of time, subject to vesting and other restrictions, as defined in the agreement.
Performance Stock Rights
Performance Stock Rights [Member]
Period of Project
Period of AMRP project
Represents the period of a capital project.
Period of Retention of Counter Party, Payment Default Risk
Period of retention of counter party payment default risk
Period of retention of counter party payment default risk (in years).
Mercury Emission Reduction for Electric Generating Units above 150 MW
Level of electric generating units above which a 90% reduction in mercury emissions is required by 2015 (in MW)
Represents electric generating units for which a 90% reduction in mercury emissions is required by 2015.
Mercury Emission Reduction for Electric Generating Units above 25 MW
Level of electric generating units above which a reduction in mercury emissions (in MW)
Represents the percentage of mercury reduction beginning year 2015, required by Best Available Control Technology rule.
Percentage Mercury Emission Reduction for Electric Generating Units above 150 MW
Percentage mercury reduction, required by Best Available Control Technology rule
Represents the percentage of mercury emission reduction for electric generating units above 150 MW as required by BACT rule.
Percentage, Mercury Emission Reduction
Percentage mercury reduction required by Best Available Control Technology rule
Represents the percentage of mercury emission reduction required by BACT rule.
Pinnacle CNG Systems [Member]
Pinnacle CNG Systems
Represents information pertaining to Pinnacle CNG Systems.
Weston 3 outage expenses
Power Outage Expenses
This element represents the losses incurred on account of damage from lightning strike and also includes insurance expenses to cover all equipment damage costs. It also includes the expenses on account of repairs of the generator rotor, turbine rotors and boiler feed pumps.
PREFERRED STOCK OF SUBSIDIARY.
Represents the preferred stock of subsidiary.
Preferred Stock of Subsidiary
Preferred Stock of Subsidiary [Member]
Notice period for redemption of preferred stock
Preferred Stock, Redemption Notice Period
Notice period for the redemption of preferred stock that is redeemable in whole or in part at WPS's option.
Represents the preferred stock series with a dividend rate of 5.00 percent.
5.00% Preferred Stock Series
Preferred Stock Series 5.00 Percent [Member]
5.04% Preferred Stock Series
Preferred Stock Series 5.04 Percent [Member]
Represents the preferred stock series with a dividend rate of 5.04 percent.
Preferred Stock Series 5.08 Percent [Member]
Represents the preferred stock series with a dividend rate of 5.08 percent.
5.08% Preferred Stock Series
Represents the preferred stock series with a dividend rate of 6.76 percent.
6.76% Preferred Stock Series
Preferred Stock Series 6.76 Percent [Member]
Represents the preferred stock series with a dividend rate of 6.88 percent.
6.88% Preferred Stock Series
Preferred Stock Series 6.88 Percent [Member]
Probable Reduction in Total Exposure
Probable reduction in total exposure
Probable reduction in total exposure due to inconsistencies between the FERC's SECA order and the transmission owners' compliance filings.