| Item | Type | Period | Balance | Description | | Regulated Operations | text | | | |
| Public Utilities Disclosure | text | | | The entire disclosure for public utilities. |
| Balance Sheet Related Disclosures | text | | | |
| Income Statement Related Disclosures | text | | | |
| Public Utilities, Allowance for Funds Used During Construction, Net Increase | text | | | |
| Public Utilities, Phase-in Plans | text | | | |
| Public Utilities, Property, Plant and Equipment | text | | | |
| Public Utilities General Disclosures | text | | | Tabular disclosure of regulation for public utility entities, including, but not limited to, rate requests, decommissioning costs and the amount of allowance for earnings on equity capitalized for rate making purposes. |
| Schedule of Long-term Contracts for Purchase of Electric Power | text | | | Tabular disclosure of information concerning the terms and significance of long term contracts to purchase power (generally referred to as purchase power agreements (PPAs) or power sale agreements (PSAs)) including date of contract expiration, share of plant output being purchased, estimated annual cost, annual minimum debt service payment required and amount of related long-term debt or lease obligations outstanding. |
| Schedule of Jointly Owned Utility Plants | text | | | Tabular disclosure of proportionate interests in jointly owned utility plants. Includes the amount of plants in service, the accumulated provision for depreciation (if available), the amount of plants under construction, and the proportionate share. The amounts presented may be further subdivided to show amounts applicable to plant subcategories (for example, production, transmission, distribution). Includes statements that the amounts represent the utility's share in each joint plant and that it must provide its own financing. Information concerning two or more generating plants on the same site may be combined. States that the utility's share of direct expenses of the joint plants is included in the corresponding operating expenses on its income statement (for example, fuel, maintenance of plant, other operating expense). If the share of direct expenses is charged to purchased power, then disclose the amount so charged and the proportionate amounts charged to specific operating expenses on the records maintained for the joint plants. |
| Regulatory Assets and Liabilities Disclosure | text | | | |
| Schedule of Capitalization | text | | | Tabular disclosure of the capitalization of the entity comprised of its long-term debt and equity instruments. The table may be detailed by subsidiary (legal entity) and include information by type of debt or equity detailed by instrument. |
| Schedule of Utility Inventory | text | | | Tabular disclosure of all information related to inventories for utilities. |
| Other Utility Balance Sheet Accounts | text | | | |
| Regulated and Unregulated Operating Revenue | text | | | |
| Utilities Operating Expense | text | | | |
| Utilities Operating Expense, Purchased Power under Long-term Contracts | $ | duration | debit | Amount of operating expense for purchased power procured under arrangements extending beyond one year or the normal operating cycle, if longer, by regulated operation. |
| Refund Received Related to Revenue from Different Year, Year Revenue Recognized | text | | | Discloses year revenue was initially recognized related to refunds that are recognized in a period other than the period in which the related revenue was recognized and that have a material effect on net income. |
| Discontinued Application of Specialized Accounting for Regulated Operations | $ | duration | credit | Net effect of discontinued application of the specialized accounting to all or part of its operations; the entity eliminates from its statement of financial position prepared for general-purpose external financial reporting the effects of any actions of regulators that had been recognized as assets and liabilities pursuant to that specialized accounting but would not have been recognized as assets and liabilities by entities in general except for carrying amounts of plant, equipment, and inventory measured and reported pursuant to that specialized accounting unless those assets are impaired, in which case the carrying amounts of those assets is reduced to reflect that impairment. This element is gross of the related tax effect. |
| Interest Costs Incurred | text | | | |
| Excise Taxes Collected | $ | duration | credit | The excise taxes collected by a public utility and reported in revenues if the amount of excise taxes is equal to 1 percent or more of such total. |
| Allowance for Funds Used During Construction, Capitalized Interest | $ | duration | debit | Amount capitalized of allowance for funds used during construction. |
| Public Utilities, Allowance for Funds Used During Construction, Description | text | | | Information pertaining to allowance for funds used during construction (AFUDC) for utilities (for example, description of projects, computation, amounts, rates, accounting, recovery period, noncash income). Allowance for funds used during construction represents the estimated costs of debt and equity financings necessary to finance the construction of regulated assets. May also indicate the financial statement captions that are affected by AFUDC, such as construction work in progress, other revenue, and interest expense (as a reduction for the capitalized portion). |
| Public Utilities, Allowance for Funds Used During Construction, Additions | $ | duration | credit | Total increase in earnings in the period representing the cost of equity (based on assumed rate of return) and/or borrowed funds (based on interest rate) used to finance construction of regulated assets, which is expected to be recovered through rate adjustments. |
| Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity | $ | duration | credit | The component of the allowance for funds used during construction during the period based on an assumed rate of return on equity funds used in financing the construction of regulated assets. |
| Public Utilities, Description of Allowance for Funds Used During Construction, Equity Costs Capitalized Only for Rate-making Purposes | text | | | Description of the nature of costs of debt and equity financing capitalized for setting rates but not capitalized for financial statement purposes. |
| Public Utilities, Amount of Allowance for Funds Used During Construction, Equity Costs Capitalized Only for Rate-making Purposes | $ | instant | credit | Amount of costs of debt and equity financing capitalized for setting rates but not capitalized for financial statement purposes. |
| Public Utilities, Allowance for Funds Used During Construction, Rate | % | duration | | Effective rate, including composite rate, of cost of financing additions to qualifying regulated assets, commonly called allowance for funds used during construction. |
| Public Utilities, Phase-in Plan Terms | text | | | Describes the terms of phase-in plans in effect during the current year or ordered for future years. |
| Phase-in Plan, Amount of Costs Deferred for Rate-making Purposes | $ | instant | debit | The total amount of allowable costs capitalized during the period by the entity pertaining to Phase-In plans which were deferred on the expectation of future recovery. |
| Phase-in Plan, Amount of Capitalized Costs Recovered | $ | duration | credit | The sum total amount of allowable costs capitalized in the period pertaining to a phase-in plan and previously capitalized costs that were recovered (recognized in earnings) during the period through rates. |
| Phase-in Plan, Net Change in Amount of Costs Deferred for Rate-making Purposes | $ | duration | debit | The increase (decrease) during the period in the costs deferred for rate-making purposes. |
| Public Utility Property, Plant, and Equipment | text | | | Tabular disclosure of public utility physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, deprecation expense and method used, including composite depreciation, and accumulated deprecation. |
| Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service | % | duration | | Composite depreciation rate for public utility plants in service. |
| Public Utilities, Property, Plant and Equipment, Original Cost of Intangible Utility Plants | $ | instant | debit | Original cost of establishing intangible utility plants. |
| Public Utilities, Property, Plant and Equipment, Plant Acquisition Adjustments for Intangible Utility Plants | $ | instant | debit | Any changes made to the acquisition costs of intangible utility plants. |
| Public Utilities, Property, Plant and Equipment, Plant Adjustments for Intangible Utility Plants | $ | instant | debit | Any changes made to the basis costs of intangible utility plants. |
| Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments | $ | instant | debit | Amount of acquisition adjustments included in property, plant and equipment (PPE) for utilities. |
| Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments, Related Accumulated Depreciation | $ | instant | credit | Amount of increase (decrease) for acquisition adjustments on accumulated depreciation included in long-lived, physical assets used to produce goods and services and not intended for resale for utilities. |
| Public Utilities, Property, Plant and Equipment, Present Value of Regulated Asset for Plant Abandonment | $ | instant | debit | The present value amount of future cost recoveries that are probable and estimable related to plant abandonment's for regulated industries. |
| Public Utilities, Property, Plant and Equipment, Amount of Loss (Recovery) on Plant Abandonment | $ | duration | debit | Amount of loss (recovery of loss) related to a plant abandonment. |
| Public Utilities, Property, Plant and Equipment, Amount of Indirect Disallowance of Costs of Recently Completed Plants | $ | duration | debit | The amount of indirect disallowance of costs of a recently completed plant. When it becomes probable that part of the cost of a recently completed plant will be disallowed for rate-making purposes and a reasonable estimate of the amount of the disallowance can be made, the estimated amount of the probable disallowance is deducted from the reported cost of the plant and recognized as a loss. If part of the cost is explicitly, but indirectly, disallowed (for example, by an explicit disallowance of return on investment on a portion of the plant), an equivalent amount of cost is deducted from the reported cost of the plant and recognized as a loss. |
| Public Utilities, Property, Plant and Equipment, Amount of Disallowed Costs for Recently Completed Plant | $ | instant | credit | Amount of disallowed costs for rate making purposes for recently completed plants in regulated industries. |
| Public Utilities, Property, Plant and Equipment, Amount of Remainder of Costs of Disallowed Assets for Recently Completed Plant | $ | instant | debit | The remaining amount of assets disallowed from inclusion in the rate making process pertaining to recently completed plants in regulated industries. |
| Public Utilities, Property, Plant and Equipment, Amortization of Present Value of Regulated Asset for Plant Abandonment | $ | duration | debit | Amortization of the present value amount of future cost recoveries related to plant abandonment in regulated industries. |
| Public Utilities, Property, Plant and Equipment, Description of Electric Utility Use of Intermediary for Plant Construction | text | | | Describes the organization and purpose of the intermediary and the nature of its authorization to incur debt to finance construction. The note discloses the rate at which interest on this debt has been capitalized and the dollar amount for each period for which an income statement is presented. |
| Public Utilities, Property, Plant and Equipment, Amount of Interest Incurred on Intermediary Debt for Electric Utility Plant Construction | $ | duration | debit | Amount of interest cost incurred for plant construction by an electric utility using a construction intermediary. |
| Public Utilities, Property, Plant and Equipment, Interest Rate on Intermediary Debt for Electric Utility Plant Construction | % | duration | | Discloses the interest rate related to debt for plant construction for an electric utility using an intermediary for each period for which an income statement is presented. |
| Public Utilities, Property, Plant and Equipment, Amount of Construction Work in Process Included in Rate Base | $ | instant | debit | Discloses the amount of construction work in process that is included in the rate making process at period end. |
| Public Utilities General Disclosures | text | | | Disclosure of information about regulation for public utility entities, including, but not limited to, rate requests, decommissioning costs and the amount of allowance for earnings on equity capitalized for rate making purposes. |
| Long-term Contracts for Purchase of Electric Power | text | | | Presents detailed element information concerning the terms and significance of long term contracts to purchase power. |
| Jointly Owned Utility Plant Interests | text | | | Detailed information about jointly owned utility plants. |
| Net Regulatory Assets | text | | | |
| Schedule of Regulatory Assets | text | | | Tabular disclosure of assets that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. |
| Schedule of Regulatory Assets and Liabilities | text | | | The entire disclosure for detailed information about regulatory assets and liabilities, including current and noncurrent assets created when regulatory agencies permit the deferral of costs to the balance sheet that would otherwise be required to appear on the company's income statement and would be charged against current expenses or revenues, as well as current and noncurrent liabilities created when regulatory agencies permit. |
| Schedule of Regulatory Liabilities | text | | | Tabular disclosure of regulatory liabilities. Detailed information about liabilities that result from rate actions of a regulator. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability. |
| Public Utilities, Description of Specific Regulatory Liabilities | text | | | Description of a specific regulatory liability pertaining to public utilities. |
| Regulatory Assets and Liabilities, Other Disclosures | text | | | |
| Schedule of Capitalization | text | | | Summarization of information required and determined to be disclosed concerning the capitalization of the entity which is comprised of its long-term debt and equity instruments. The table may be detailed by subsidiary (legal entity) and include information by type of debt or equity detailed by instrument. |