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Disclosure - Business Segment Data (Details) link:presentationLink link:calculationLink link:definitionLink 00340 - Disclosure - Short-term Borrowings (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 00350 - Disclosure - Short-term Borrowings (Schedule of Line of Credit) (Details) link:presentationLink link:calculationLink link:definitionLink 00360 - Disclosure - Short-term Borrowings (Schedule of Weighted Average Daily Amounts of Borrowings Outstanding) (Details) link:presentationLink link:calculationLink link:definitionLink 00370 - Disclosure - Commitments and Contingent Liabilities (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 00380 - Disclosure - Commitments and Contingent Liabilities (Schedule of Purchased Water Costs) (Details) link:presentationLink link:calculationLink link:definitionLink 00390 - Disclosure - Commitments and Contingent Liabilities (Schedule of Operating Lease ROU Assets and Lease Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 00400 - Disclosure - Commitments and Contingent Liabilities (Schedule of Future Minimum Operating Lease) (Details) link:presentationLink link:calculationLink link:definitionLink 00410 - Disclosure - Employee Benefit Plans (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 00420 - Disclosure - Employee Benefit Plans (Schedule of Benefits Plans) (Details) link:presentationLink link:calculationLink link:definitionLink 00430 - Disclosure - Revenue Recognition from Contracts with Customers (Schedule of Operating Revenue) (Details) link:presentationLink link:calculationLink link:definitionLink 00440 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink