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Statement - Consolidated Statement of Cash Flows link:presentationLink link:calculationLink link:definitionLink 0000010 - Disclosure - Organization and Operations link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - Regulatory Matters link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - Capitalization link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - Lines of Credit link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - Long-Term Debt link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - Intangible Assets link:presentationLink link:calculationLink link:definitionLink 0000018 - Disclosure - Commitments link:presentationLink link:calculationLink link:definitionLink 0000019 - Disclosure - Contingencies link:presentationLink link:calculationLink link:definitionLink 0000020 - Disclosure - Benefit Plans link:presentationLink link:calculationLink link:definitionLink 0000021 - Disclosure - Equity Plans link:presentationLink link:calculationLink link:definitionLink 0000022 - Disclosure - Segment and Non-Tariffed Businesses Reporting link:presentationLink link:calculationLink link:definitionLink 0000023 - Disclosure - Acquisitions link:presentationLink link:calculationLink link:definitionLink 0000024 - Disclosure - Financial Statement Schedule link:presentationLink link:calculationLink link:definitionLink 0000025 - Disclosure - Valuation and Qualifying Accounts and Reserves link:presentationLink link:calculationLink link:definitionLink 9954471 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 9954472 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 9954473 - 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Disclosure - Summary of Significant Accounting Policies - Property, Plant and Equipment and Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9954483 - Disclosure - Summary of Significant Accounting Policies - Nonutility Properties and Real Estate Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9954484 - Disclosure - Summary of Significant Accounting Policies - Impairments of Long-Lived Assets and Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 9954485 - Disclosure - Summary of Significant Accounting Policies - Cash and Cash Equivalents, and Restricted Cash (Details) link:presentationLink link:calculationLink link:definitionLink 9954486 - Disclosure - Summary of Significant Accounting Policies - Financial Instruments and Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9954487 - Disclosure - Summary of Significant Accounting Policies - Advances for Construction and Contributions in Aid of Construction (Details) link:presentationLink link:calculationLink link:definitionLink 9954488 - Disclosure - Summary of Significant Accounting Policies - Asset Retirement Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 9954489 - Disclosure - Summary of Significant Accounting Policies - Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9954490 - Disclosure - Summary of Significant Accounting Policies - Earnings per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - Regulatory Matters - Regulatory Assets, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9954492 - Disclosure - Capitalization (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - Lines of Credit - Schedule of Lines of Credit (Details) link:presentationLink link:calculationLink link:definitionLink 9954494 - Disclosure - Lines of Credit - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954495 - Disclosure - Long-Term Debt - Schedule of Long-term Debt Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9954496 - Disclosure - Long-Term Debt - Schedule of Maturities of Long-term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9954497 - Disclosure - Long-Term Debt - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954498 - Disclosure - Income Taxes - Components of Income Tax Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9954499 - Disclosure - Income Taxes - Federal Statutory Rate Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9954500 - Disclosure - Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9954501 - Disclosure - Income Taxes - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954502 - Disclosure - 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Disclosure - Benefit Plans - Reconciliation of Funded Status (Details) link:presentationLink link:calculationLink link:definitionLink 9954511 - Disclosure - Benefit Plans - Amounts Recognized in Balance Sheet (Details) link:presentationLink link:calculationLink link:definitionLink 9954512 - Disclosure - Benefit Plans - Schedule of Accumulated and Projected Benefit Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9954513 - Disclosure - Benefit Plans - Plan Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9954514 - Disclosure - Benefit Plans - Benefits Expected to be Paid in Next Five Years (Details) link:presentationLink link:calculationLink link:definitionLink 9954515 - Disclosure - Equity Plans - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954516 - Disclosure - Equity Plans - Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan (Details) link:presentationLink link:calculationLink link:definitionLink 9954517 - 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