2107100 - Disclosure - Asset Retirement Obilgations link:presentationLink link:calculationLink link:definitionLink 2407405 - Disclosure - Asset Retirement Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 2207201 - Disclosure - Asset Retirement Obligations (Policies) link:presentationLink link:calculationLink link:definitionLink 2307302 - Disclosure - Asset Retirement Obligations (Tables) link:presentationLink link:calculationLink link:definitionLink 2103100 - Disclosure - Balance Sheet Components link:presentationLink link:calculationLink link:definitionLink 2403402 - Disclosure - Balance Sheet Components Allowance for Uncollectible accounts activity (Details) link:presentationLink link:calculationLink link:definitionLink 2403405 - Disclosure - Balance Sheet Components (Details) link:presentationLink link:calculationLink link:definitionLink 2403403 - Disclosure - Balance Sheet Components Investments Held in Trust (Details) link:presentationLink link:calculationLink link:definitionLink 2403404 - Disclosure - Balance Sheet Components Schedule of Other Asssets and Other Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2303301 - Disclosure - Balance Sheet Components (Tables) link:presentationLink link:calculationLink link:definitionLink 2101100 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 2201201 - Disclosure - Basis of Presentation Basis of Presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 2401402 - Disclosure - Basis of Presentation (Details) link:presentationLink link:calculationLink link:definitionLink 2115100 - Disclosure - Commitments and Guarantees link:presentationLink link:calculationLink link:definitionLink 2415405 - Disclosure - Commitments and Guarantees (Details) link:presentationLink link:calculationLink link:definitionLink 2215201 - Disclosure - Commitments and Guarantees (Policies) link:presentationLink link:calculationLink link:definitionLink 2415404 - Disclosure - Commitments and Guarantees Schdule of Long term contracts for purchase of electric power (Details) link:presentationLink link:calculationLink link:definitionLink 2315302 - Disclosure - Commitments and Guarantees (Tables) link:presentationLink link:calculationLink link:definitionLink 2415403 - Disclosure - Commitments and Guarantees Unrecorded Unconditional Purchase Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 1003000 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 1003001 - Statement - Consolidated Balance Sheets Consolidated Balance Sheet Parentheticals link:presentationLink link:calculationLink link:definitionLink 1006000 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 1002000 - Statement - Consolidated Statements of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 1002001 - Statement - Consolidated Statements of Comprehensive Income Consolidated Statement of Comprehensive Income Parentheticals link:presentationLink link:calculationLink link:definitionLink 1004000 - Statement - Consolidated Statements of Equity link:presentationLink link:calculationLink link:definitionLink 1004001 - Statement - Consolidated Statements of Equity Consolidated Statement of Equity Parenthetical link:presentationLink link:calculationLink link:definitionLink 1001000 - Statement - Consolidated Statements of Income link:presentationLink link:calculationLink link:definitionLink 2118100 - Disclosure - Contingencies link:presentationLink link:calculationLink link:definitionLink 2418402 - Disclosure - Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 2218201 - Disclosure - Contingencies (Policies) link:presentationLink link:calculationLink link:definitionLink 2405407 - Disclosure - Counterparties representing 10% or more (Details) link:presentationLink link:calculationLink link:definitionLink 2108100 - Disclosure - Credit Facilities link:presentationLink link:calculationLink link:definitionLink 2408403 - Disclosure - Credit Facilities (Details) link:presentationLink link:calculationLink link:definitionLink 2408402 - Disclosure - Credit Facilities Schedule of Short term debt (Details) link:presentationLink link:calculationLink link:definitionLink 2308301 - Disclosure - Credit Facilities (Tables) link:presentationLink link:calculationLink link:definitionLink 0001000 - Document - DEI Document link:presentationLink link:calculationLink link:definitionLink 2114100 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 2414403 - Disclosure - Earnings Per Share Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 2414402 - Disclosure - Earnings Per Share Schedule of Earnings per Share, Basic and Diluted (Details) link:presentationLink link:calculationLink link:definitionLink 2314301 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 2110100 - Disclosure - Employee Benefits link:presentationLink link:calculationLink link:definitionLink 2410403 - Disclosure - Employee Benefits Assets and Liabilities associated with Non-qualified benefit plans (Details) link:presentationLink link:calculationLink link:definitionLink 2410410 - Disclosure - Employee Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 2210201 - Disclosure - Employee Benefits (Policies) link:presentationLink link:calculationLink link:definitionLink 2410404 - Disclosure - Employee Benefits Schedule of Allocation of Plan Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2410406 - Disclosure - Employee Benefits Schedule of Changes in Fair Value of Plan Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2410407 - Disclosure - Employee Benefits Schedule of Defined Benefit Plan Disclosures (Details) link:presentationLink link:calculationLink link:definitionLink 2410409 - Disclosure - Employee Benefits Schedule of Expected Benefit Payments (Details) link:presentationLink link:calculationLink link:definitionLink 2410405 - Disclosure - Employee Benefits Schedule of Fair Value, Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2410408 - Disclosure - Employee Benefits Schedule of Net Benefit Costs (Details) link:presentationLink link:calculationLink link:definitionLink 2310302 - Disclosure - Employee Benefits (Tables) link:presentationLink link:calculationLink link:definitionLink 2112100 - Disclosure - Equity-Based Plans link:presentationLink link:calculationLink link:definitionLink 2412401 - Disclosure - Equity-Based Plans (Details) link:presentationLink link:calculationLink link:definitionLink 2104100 - Disclosure - Fair Value of FInancial Instruments link:presentationLink link:calculationLink link:definitionLink 2404406 - Disclosure - Fair Value of Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 2404404 - Disclosure - Fair Value of FInancial Instruments Fair Value Options Quantitative Disclosure (Details) link:presentationLink link:calculationLink link:definitionLink 2404405 - Disclosure - Fair Value of FInancial Instruments Fair Value Unobservable Input Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 2204201 - Disclosure - Fair Value of Financial Instruments (Policies) link:presentationLink link:calculationLink link:definitionLink 2404403 - Disclosure - Fair Value of FInancial Instruments Schedule of Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 2304302 - Disclosure - Fair Value of Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 2405403 - Disclosure - Fair values of price risk management assets and liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2405406 - Disclosure - Future year net unrealized gain/loss recorded at balance sheet date expected to become realized (Details) link:presentationLink link:calculationLink link:definitionLink 2111100 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 2411405 - Disclosure - Income Taxes Income taxes (Details) link:presentationLink link:calculationLink link:definitionLink 2311301 - Disclosure - Income Taxes Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 2411402 - Disclosure - Income Taxes Schedule of Components of Income Tax Expense (Details) link:presentationLink link:calculationLink link:definitionLink 2411404 - Disclosure - Income Taxes Schedule of Deferred tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2411403 - Disclosure - Income Taxes Schedule of Effective Income Tax Rate Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 2117100 - Disclosure - Jointly-owned Plant link:presentationLink link:calculationLink link:definitionLink 2417403 - Disclosure - Jointly-owned Plant Jointly Owned Plant (Details) link:presentationLink link:calculationLink link:definitionLink 2417402 - Disclosure - Jointly-owned Plant Schedule of Jointly-owned plant (Details) link:presentationLink link:calculationLink link:definitionLink 2317301 - Disclosure - Jointly-owned Plant (Tables) link:presentationLink link:calculationLink link:definitionLink 2109100 - Disclosure - Long-term Debt link:presentationLink link:calculationLink link:definitionLink 2409404 - Disclosure - Long term debt (Details) link:presentationLink link:calculationLink link:definitionLink 2409402 - Disclosure - Long-term Debt Schedule of Long Term Debt Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 2409402 - Disclosure - Long-term Debt Schedule of Long Term Debt Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 2409403 - Disclosure - Long-term Debt Schedule of Maturities of Long term debt (Details) link:presentationLink link:calculationLink link:definitionLink 2309301 - Disclosure - Long term debt (Tables) link:presentationLink link:calculationLink link:definitionLink 2405405 - Disclosure - Net realized and unrealized gains and losses on derivative transactions (Details) link:presentationLink link:calculationLink link:definitionLink 2405404 - Disclosure - Net volumes related to price risk management activities (Details) link:presentationLink link:calculationLink link:definitionLink 2405408 - Disclosure - Price Risk Management (Details) link:presentationLink link:calculationLink link:definitionLink 2105100 - Disclosure - Price Risk Management (Notes) link:presentationLink link:calculationLink link:definitionLink 2205201 - Disclosure - Price Risk Management (Policies) link:presentationLink link:calculationLink link:definitionLink 2305302 - Disclosure - Price Risk Management (Tables) link:presentationLink link:calculationLink link:definitionLink 2106100 - Disclosure - Regulatory Assets and Liabilities link:presentationLink link:calculationLink link:definitionLink 2406404 - Disclosure - Regulatory Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2206201 - Disclosure - Regulatory Assets and Liabilities (Policies) link:presentationLink link:calculationLink link:definitionLink 2406403 - Disclosure - Regulatory Assets and Liabilities Schedule of Regulatory Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2306302 - Disclosure - Regulatory Assets and Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 2407403 - Disclosure - Schedule of Asset Retirement Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 2407404 - Disclosure - Schedule of Change in Asset Retirement Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 2113100 - Disclosure - Stock-based Compensation Expense link:presentationLink link:calculationLink link:definitionLink 2413404 - Disclosure - Stock-based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 2413402 - Disclosure - Stock-based Compensation Expense Restricted and Performance Stock Unit Activity (Details) link:presentationLink link:calculationLink link:definitionLink 2313301 - Disclosure - Stock-based Compensation Expense Restricted and Performance Stock Unit activity (Tables) link:presentationLink link:calculationLink link:definitionLink 2413403 - Disclosure - Stock-based Compensation Expense Schedule Of Share Based Payment Award Stock Options Valuation Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 2102100 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 2402404 - Disclosure - Summary of Significant Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 2402403 - Disclosure - Summary of Significant Accounting Policies Estimated average service lives (Details) link:presentationLink link:calculationLink link:definitionLink 2202201 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 2302302 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 2116100 - Disclosure - Variable Interest Entities link:presentationLink link:calculationLink link:definitionLink 2416401 - Disclosure - Variable Interest Entities (Details) link:presentationLink link:calculationLink link:definitionLink