No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Sum of the carrying amounts as of the balance sheet date of common stock, retained earnings, and accumulated other comprehensive income/loss. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This element represnts the tax effect of the net unrealized gains on nuclear decommissioning trust funds during the reporting period. No authoritative reference available. Tax effect on the adjustment to other comprehensive income for amortization of net actuarial loss, prior service cost and transition obligation recognized as a component of net periodic benefit cost during the period. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This element represents the net unrealized gains/losses on nuclear decommissioning trust funds, net of taxes during the reporting period. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Sum of the carrying amount of all investments and other assets that are expected to be realized or consumed after one year (or the normal operating cycle, if longer), excluding property, plant & equipment. No authoritative reference available. NonCurrent portion of remaining unamortized balance of non-derivative energy contracts that we acquired or derivatives designated as normal purchases and normal sales previously recorded as "Derivative assets." No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of cash or cash equivalents contributed during the reporting period by the entity to fund its pension plans and its nonpension postretirement benefit plans as well as payments to retirees and disabled employees. No authoritative reference available. Common stock issued and share base awards, issued to MidAmerican Energy Holdings No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Cash outflows for the investment in securities within the nuclear decommissioning trust fund that are classified as cash flows from investing activities and are reported on a gross basis. No authoritative reference available. No authoritative reference available. No authoritative reference available. Value of new stock during the period and equity impact of any share-based compensation plan. No authoritative reference available. The adjustment to other comprehensive income for amortization of net actuarial loss, prior service cost and transition obligation recognized as a component of net periodic benefit cost during the period, after tax. No authoritative reference available. Current portion of remaining unamortized balance of non-derivative energy contracts that we acquired or derivatives designated as normal purchases and normal sales previously recorded as "Derivative liabilities." No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This element represents the proceeds from the sale of membership interest in joint venture. No authoritative reference available. The net cash inflow for acquired energy purchase and sale agreements. These agreements had contract prices that differed from market prices at closing, which resulted in cash payments from the counterparty at the acquisition of the agreements. No authoritative reference available. Number of shares of new stock issued during the period and number of shares issued during the period as a result of any share-based compensation plan. No authoritative reference available. This element represents the net unrealized losses on defined benefit plans, net of taxes during the reporting period. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The portion of net income (loss) attributable to the noncontrolling interest (if any) deducted in order to derive the portion attributable to the parent combined with the aggregate value of preferred stock dividends and other adjustments necessary to derive net income apportioned to common stockholders. No authoritative reference available. Increase/decrease in balance of noncontrolling interest due to consolidation/deconsolidation of a variable interest entity during the period. A modification of contractual arrangements changed the allocation of economic risks and rewards of the variable interest entity among the variable interest holders. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The net change during the reporting period of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements, excluding collateral. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Sum of carrying amount of deferred credits and other liabilities that are expected to be repaid beyond the following 12 months or business cycle. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of ongoing cash flows related to certain out-of-the-money acquired contracts that are derivatives and contain a financing element. As a result, the cash flows from these contracts are reclassified from cash provided by (used in) operating activities to cash provided by (used in) financing activities. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. NonCurrent portion of remaining unamortized balance of non-derivative energy contracts that we acquired or derivatives designated as normal purchases and normal sales previously recorded as "Derivative liabilities." No authoritative reference available. No authoritative reference available. No authoritative reference available. The expense charged against earnings for the periodic recognition of nuclear fuel costs. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase, and the acquisition of other tangible assets not otherwise defined in the taxonomy. No authoritative reference available. No authoritative reference available. No authoritative reference available. Detailed information about assets/liabilities that are created when regulatory agencies permit public utilities to defer certain costs/benefits included in rate-setting to the balance sheet, reported on a net basis, as a single block of text. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of ongoing cash flows related to certain out-of-the-money acquired contracts that are derivatives and contain an other than insignificant financing element. As a result, the cash flows from these contracts are reclassified from cash provided by (used in) operating activities to cash provided by (used in) financing activities. No authoritative reference available. No authoritative reference available. No authoritative reference available. The cash flow impact of costs related to a merger and our pursuit of other strategic alternatives to the merger. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Includes disclosure of commitments and contingencies. This element may be used as a single block of text to encapsulate the entire disclosure including data and tables. Also provides pertinent information about each guarantee obligation, or each group of similar guarantee obligations, including (a) the nature of the guarantee, including its term, how it arose, and the events or circumstances that would require the guarantor to perform under the guarantee; (b) the maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee; (c) the current carrying amount of the liability, if any, for the guarantor's obligations under the guarantee; and (d) the nature of any recourse provisions under the guarantee, and any assets held either as collateral or by third parties, and any relevant related party disclosure. Excludes disclosures about product warranties. No authoritative reference available. No authoritative reference available. No authoritative reference available. The net change during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services and amounts related to exchange-traded derivatives, excluding margin. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The cash outflow for the issuance of loan receivable arising from the financing of goods and services. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The balance consists of interest capitalized during the period for the nonregulated business and the allowance for borrowed funds used during construction in the regulated business during the period, which may be reflected as a reduction of interest expense. No authoritative reference available. The aggregate interest expense incurred on all borrowings, net of capitalized interest and allowance for borrowed funds used during construction. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This element represents the current portion of the unamortized energy contract assets related to CENG joint venture. No authoritative reference available. Gain on sale of 49.99% membership interest in CENG. No authoritative reference available. Non-cash impairment charge on certain nuclear decommissioning trust fund assets. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Amount of costs related to a merger and our pursuit of other strategic alternatives to the merger that were charged to expense during the period. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Increase in noncontrolling interest balance from contribution by noncontrolling interest. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This element represents the noncurrent protion of the unamortized energy contract assets related to CENG joint venture. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This element may be used to capture the complete disclosure of all significant events which have occurred during the period. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Description of asset acquisions and business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. This element may be used as a single block of text to encapsulate the entire disclosure (including data and tables) regarding business combinations, including leverage buyout transactions (as applicable). No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This element represents the tax effect of the net unrealized losses on defined benefit plans during the reporting period. No authoritative reference available. Tax effect of other comprehensive income related to equity investment in CENG joint venture No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This element represents other comprehensive income related to other equity investments during the period, net of tax. No authoritative reference available. No authoritative reference available. No authoritative reference available. This element represents other adjustments to accumulated comprehensive income during the period, after tax, not otherwise specified in the taxonomy. No authoritative reference available. No authoritative reference available. No authoritative reference available. The net cash outflow for acquired energy purchase and sale agreements. These agreements had contract prices that differed from market prices at closing, which resulted in cash payments to the counterparty at the acquisition of the agreements. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Proceeds from the sale of securities within the nuclear decommissioning trust fund that are classified as cash flows from investing activities and are reported on a gross basis. No authoritative reference available. This element represents other comprehensive income related to equity investment in CENG joint venture during the period, after tax. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of pension, postemployment, and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for (1) defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss on assets, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments) and for (2) defined contribution plans (to the extent that a plan's defined contributions to an individual's account are to be made for periods in which that individual renders services, the net cost for a period shall be the contribution called for in that period; if a plan calls for contributions for periods after an individual retires or terminates, the estimated cost shall be accrued during the employee's service period). No authoritative reference available. This element can be used to disclose the entity's entire derivative instruments and hedging activities disclosure as a single block of text. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising there from, and the amounts of and methodologies and assumptions used in determining the amounts of such items. This item also represents the complete disclosure regarding the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the Company is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risk is are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. No authoritative reference available. Tax effect of other comprehensive income related to other equity investments. No authoritative reference available. For classified balance sheets this represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans, other postretirement defined benefit plans and other postemployment benefits (i.e. benefits for disabled and their dependents). No authoritative reference available. This element may be used to capture the entire disclosure for an employer that sponsors one or more defined benefit pension plans or one or more other defined benefit postretirement plans, of certain information, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. Also includes description containing the entire postemployment benefits disclosure which may include supplemental unemployment benefits, obligations recognized for all types of benefits provided to former or inactive employees, their beneficiaries, and covered dependents after employment but before retirement. Disclosure may also include discussion that an obligation for postemployment benefits is not accrued in accordance with regulation only because the amount cannot be reasonably estimated. Also includes description of the terms and benefits provided by the employer's defined contribution plans. A defined contribution plan provides benefits in return for services rendered, provides an individual account for each participant, and has terms that specify how contributions to the individual's account are to be determined rather than the amount of benefits the individual is to receive. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Transactions that result in no cash inflows or outflows in the period in which they occur, but affect net income and thus are removed when calculating net cash flow from operating activities using the indirect method combined with the net change during the reporting period in the value of other assets or liabilities used in operating activities that are not otherwise defined in the taxonomy. This element is used when there is not a more specific and appropriate element. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Also includes amounts related to exchange-traded derivatives including related margin postings. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This element represents the accrual of residential customer credit No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Decrease in noncontrolling interest balance as a result of deconsolidating a subsidiary. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Equity investment disclosure, or group of investments for which combined disclosure is appropriate, including: (a) the name of each investee and percentage of ownership of common stock, (b) accounting policies for investments in common stock, (c) difference between the amount at which the investment is carried and the amount of underlying equity in net assets and the accounting treatment of the difference, (d) the total fair value of each identified investment for which a market value is available, (e) summarized information as to assets, liabilities, and results of operations of the investees (for investments in unconsolidated subsidiaries, common stock of joint ventures, or other investments using the equity method), and (f) material effects of possible conversions, exercises, or contingent issuances of the investee. Other disclosures include (a) the names of any investee in which the investor owns 20 percent or more of the voting stock and investment is not accounted for using the equity method, and the reasons why not, and (b) the names of any investee in which the investor owns less than 20% of the voting stock and the investment is accounted for using the equity method, and the reasons why it is. This item also represents the entire disclosure related to Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale. Additionally, this disclosure includes variable interest entities (VIE), including, but but not limited to the nature, purpose, size, and activities of the VIE, the carrying amount and classification of consolidated assets that are collateral for the VIE's obligations, lack of recourse if creditors (or beneficial interest holders) of a consolidated VIE have no recourse to the general credit of the primary beneficiary. An enterprise that holds a significant variable interest in a VIE but is not the primary beneficiary may disclose the nature of its involvement with the VIE and when that involvement began, the nature, purpose, size, and activities of the VIE and the enterprise's maximum exposure to loss as a result of its involvement with the VIE. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total investment in Consolidated Energy Nuclear Group, LLC. No authoritative reference available. Current portion of remaining unamortized balance of non-derivative energy contracts that we acquired or derivatives designated as normal purchases and normal sales previously recorded as "Derivative assets." No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available.