2405406 - Disclosure - Balance Sheet Components Asset Retirement Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 2405408 - Disclosure - Balance Sheet Components (Details) link:presentationLink link:calculationLink link:definitionLink 2405403 - Disclosure - Balance Sheet Components Electric Utility Plant, Net (Details) link:presentationLink link:calculationLink link:definitionLink 2105100 - Disclosure - Balance Sheet Components (Notes) link:presentationLink link:calculationLink link:definitionLink 2405402 - Disclosure - Balance Sheet Components Other Current Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2405402 - Disclosure - Balance Sheet Components Other Current Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2405405 - Disclosure - Balance Sheet Components Other Current Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2405407 - Disclosure - Balance Sheet Components Pension and Other Postretirement Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 2405404 - Disclosure - Balance Sheet Components Regulatory Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2305301 - Disclosure - Balance Sheet Components (Tables) link:presentationLink link:calculationLink link:definitionLink 2403402 - Disclosure - Basis of Presentation (Details) link:presentationLink link:calculationLink link:definitionLink 2103100 - Disclosure - Basis of Presentation (Notes) link:presentationLink link:calculationLink link:definitionLink 2203201 - Disclosure - Basis of Presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 1003000 - Statement - Condensed Consolidated Balance Sheets (Unaudited) link:presentationLink link:calculationLink link:definitionLink 1003501 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 1004000 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) link:presentationLink link:calculationLink link:definitionLink 1001000 - Statement - Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) link:presentationLink link:calculationLink link:definitionLink 2411401 - Disclosure - Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 2111100 - Disclosure - Contingencies (Notes) link:presentationLink link:calculationLink link:definitionLink 0001000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 2408402 - Disclosure - Earnings Per Share Components of Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 2408403 - Disclosure - Earnings Per Share Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 2108100 - Disclosure - Earnings Per Share (Notes) link:presentationLink link:calculationLink link:definitionLink 2308301 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 2109100 - Disclosure - Equity (Notes) link:presentationLink link:calculationLink link:definitionLink 2309301 - Disclosure - Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 2406405 - Disclosure - Fair Value of Financial Instruments Fair Value of Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 2406403 - Disclosure - Fair Value of Financial Instruments Fair Value Options Quantitative Disclosure (Details) link:presentationLink link:calculationLink link:definitionLink 2406402 - Disclosure - Fair Value of Financial Instruments Financial Assets and Liabilities Recognized at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 2106100 - Disclosure - Fair Value of Financial Instruments (Notes) link:presentationLink link:calculationLink link:definitionLink 2306301 - Disclosure - Fair Value of Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 2406404 - Disclosure - Fair Value of Financial Instruments Unobservable Input Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 2112100 - Disclosure - Guarantees (Notes) link:presentationLink link:calculationLink link:definitionLink 2413402 - Disclosure - Income tax Effective Income Tax Rate Reconcilitation (Details) link:presentationLink link:calculationLink link:definitionLink 2413403 - Disclosure - Income tax Income tax (Details) link:presentationLink link:calculationLink link:definitionLink 2113100 - Disclosure - Income tax Income tax (Notes) link:presentationLink link:calculationLink link:definitionLink 2313301 - Disclosure - Income tax Income tax (Tables) link:presentationLink link:calculationLink link:definitionLink 2407406 - Disclosure - Price Risk Management Counterparties Representing 10% or More of Assets and Liabilities from price risk management activities (Details) link:presentationLink link:calculationLink link:definitionLink 2407406 - Disclosure - Price Risk Management Counterparties Representing 10% or More of Assets and Liabilities from price risk management activities (Details) link:presentationLink link:calculationLink link:definitionLink 2407402 - Disclosure - Price Risk Management Fair values of price risk management assets and liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2407402 - Disclosure - Price Risk Management Fair values of price risk management assets and liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2407405 - Disclosure - Price Risk Management Future Year Net Unrealized Gain/Loss Recorded at Balance Sheet Date Expected to Become Realized (Details) link:presentationLink link:calculationLink link:definitionLink 2407404 - Disclosure - Price Risk Management Net realized and unrealized gains and losses on derivative transactions (Details) link:presentationLink link:calculationLink link:definitionLink 2407403 - Disclosure - Price Risk Management Net volumes related to price risk management activities (Details) link:presentationLink link:calculationLink link:definitionLink 2107100 - Disclosure - Price Risk Management (Notes) link:presentationLink link:calculationLink link:definitionLink 2407407 - Disclosure - Price Risk Management Price Risk Management (Details) link:presentationLink link:calculationLink link:definitionLink 2307301 - Disclosure - Price Risk Management (Tables) link:presentationLink link:calculationLink link:definitionLink 2404403 - Disclosure - Revenue Recognition Revenue Recognition (Details) link:presentationLink link:calculationLink link:definitionLink 2104100 - Disclosure - Revenue Recognition Revenue Recognition (Notes) link:presentationLink link:calculationLink link:definitionLink 2204201 - Disclosure - Revenue Recognition Revenue Recognition (Policies) link:presentationLink link:calculationLink link:definitionLink 2304302 - Disclosure - Revenue Recognition Revenue Recognition (Tables) link:presentationLink link:calculationLink link:definitionLink 2409402 - Disclosure - Schedule of Stockholders Equity (Details) link:presentationLink link:calculationLink link:definitionLink