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Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (Unaudited) link:presentationLink link:definitionLink link:calculationLink 995309 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (Unaudited) (Parentheticals) link:presentationLink link:definitionLink link:calculationLink 995310 - Disclosure - Basis of Presentation and Recent Developments link:presentationLink link:definitionLink link:calculationLink 995311 - Disclosure - Rate and Regulatory Matters link:presentationLink link:definitionLink link:calculationLink 995312 - Disclosure - Capitalization link:presentationLink link:definitionLink link:calculationLink 995313 - Disclosure - Earnings Per Share link:presentationLink link:definitionLink link:calculationLink 995314 - Disclosure - Business Segment Data link:presentationLink link:definitionLink link:calculationLink 995315 - Disclosure - Short-Term Borrowings link:presentationLink link:definitionLink link:calculationLink 995316 - Disclosure - Commitments and Contingent Liabilities link:presentationLink link:definitionLink link:calculationLink 995317 - Disclosure - Employee Benefit Plans link:presentationLink link:definitionLink link:calculationLink 995318 - Disclosure - Revenue Recognition from Contracts with Customers link:presentationLink link:definitionLink link:calculationLink 996000 - Disclosure - Basis of Presentation and Recent Developments (Tables) link:presentationLink link:definitionLink link:calculationLink 996001 - Disclosure - Capitalization (Tables) link:presentationLink link:definitionLink link:calculationLink 996002 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:definitionLink link:calculationLink 996003 - Disclosure - Business Segment Data (Tables) link:presentationLink link:definitionLink link:calculationLink 996004 - Disclosure - Short-Term Borrowings (Tables) link:presentationLink link:definitionLink link:calculationLink 996005 - Disclosure - Commitments and Contingent Liabilities (Tables) link:presentationLink link:definitionLink link:calculationLink 996006 - Disclosure - Employee Benefit Plans (Tables) link:presentationLink link:definitionLink link:calculationLink 996007 - Disclosure - Revenue Recognition from Contracts with Customers (Tables) link:presentationLink link:definitionLink link:calculationLink 996008 - Disclosure - Schedule of Issued Accounting Standards (Details) - Schedule of Issued Accounting Standards link:presentationLink link:definitionLink link:calculationLink 996009 - Disclosure - Rate and Regulatory Matters (Details) link:presentationLink link:definitionLink link:calculationLink 996010 - Disclosure - Capitalization (Details) link:presentationLink link:definitionLink link:calculationLink 996011 - Disclosure - Capitalization (Details) - Schedule of Carrying Amount and Fair Value of the FMBs link:presentationLink link:definitionLink link:calculationLink 996012 - Disclosure - Earnings Per Share (Details) link:presentationLink link:definitionLink link:calculationLink 996013 - Disclosure - Earnings Per Share (Details) - Schedule of Earnings Per Share link:presentationLink link:definitionLink link:calculationLink 996014 - Disclosure - Earnings Per Share (Details) - Schedule of Earnings Per Share (Parentheticals) link:presentationLink link:definitionLink link:calculationLink 996015 - Disclosure - Business Segment Data (Details) link:presentationLink link:definitionLink link:calculationLink 996016 - Disclosure - Business Segment Data (Details) - Schedule of Inter-Segment Transactions link:presentationLink link:definitionLink link:calculationLink 996017 - Disclosure - Short-Term Borrowings (Details) link:presentationLink link:definitionLink link:calculationLink 996018 - Disclosure - Short-Term Borrowings (Details) - Schedule of Lines of Credit link:presentationLink link:definitionLink link:calculationLink 996019 - Disclosure - Short-Term Borrowings (Details) - Schedule of Credit Lines and the Weighted Average Interest Rates link:presentationLink link:definitionLink link:calculationLink 996020 - Disclosure - Commitments and Contingent Liabilities (Details) link:presentationLink link:definitionLink link:calculationLink 996021 - Disclosure - Commitments and Contingent Liabilities (Details) - Schedule of Purchased Water Costs link:presentationLink link:definitionLink link:calculationLink 996022 - Disclosure - Commitments and Contingent Liabilities (Details) - Schedule of Operating Lease ROU Assets link:presentationLink link:definitionLink link:calculationLink 996023 - Disclosure - Commitments and Contingent Liabilities (Details) - Schedule of Future Minimum Operating Lease Commitments link:presentationLink link:definitionLink link:calculationLink 996024 - Disclosure - Employee Benefit Plans (Details) link:presentationLink link:definitionLink link:calculationLink 996025 - Disclosure - Employee Benefit Plans (Details) - Schedule of Employee Retirement Benefit Plans link:presentationLink link:definitionLink link:calculationLink 996026 - Disclosure - Revenue Recognition from Contracts with Customers (Details) - Schedule of Operating Revenues link:presentationLink link:definitionLink link:calculationLink 000 - Document - Document And Entity Information link:presentationLink link:definitionLink link:calculationLink