0000001 - Document - Cover Statement link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Condensed Consolidated Statements of Operations link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Condensed Consolidated Statements of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Condensed Consolidated Statements of Comprehensive Income (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Condensed Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Condensed Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Statement of Shareholders' Equity (Statement) link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Overview and Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Regulatory Matters (Notes) link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Fair Value link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Debt Obligations link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Benefit Plans link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Equity link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Contractual Obligations, Commercial Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Business Segments link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Revenue (Notes) link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Fixed-asset Impairment (Notes) link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Discontinued Operations link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Discontinued Operations link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Risk & Uncertainties (Notes) link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Summary of Significant Accounting Policies (Policy) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Regulatory Matters (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Fair Value (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Benefit Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Business Segments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Discontinued Operations (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Discontinued Operations (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Risk & Uncertainties (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Summary of Significant Accounting Policies (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Regulatory Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Fair Value (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Fair Value (Fair Value and Cost of Non-Derivative Instruments) (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Fair Value (Fair Value of Assets and Liabilities Measured on Recurring Basis) (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Fair Value Cash Equivalents (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Debt (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Debt (Long-term Debt) (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Income Taxes (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Benefit Plans (Net Periodic Benefit Cost (Income)) (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Benefit Plans (Estimated Future Benefit Payments and Medicare Part D Reimbursements) (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Equity (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Contractual Obligations, Commercial Commitments and Contingencies (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Business Segments (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Business Segments (Segment Financial Information) (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Fixed-asset Impairment Fixed-asset Impairment (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Discontinued Operations (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Discontinued Operations (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Risk & Uncertainties (Details) link:presentationLink link:calculationLink link:definitionLink