0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT (Unaudited) (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (Unaudited) link:presentationLink link:calculationLink link:definitionLink 9952159 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (Unaudited) (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Basis of Presentation and Recent Developments link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Rates and Regulatory Matters link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Capitalization link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Business Segment Data link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Short-term Borrowings link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Commitments and Contingent Liabilities link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Employee Benefit Plans link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Revenue Recognition from Contracts with Customers link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Supplemental Cash Flows Information link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Basis of Presentation and Recent Developments (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Basis of Presentation and Recent Developments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Capitalization (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Business Segment Data (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Short-term Borrowings (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Commitments and Contingent Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Employee Benefit Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Revenue Recognition from Contracts with Customers (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Supplemental Cash Flows Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Rates and Regulatory Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Capitalization - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Capitalization - Schedule of Carrying Amount and Fair Value of First Mortgage Bonds (FMBs) (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Business Segment Data - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Business Segment Data - Schedule of Segment Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Short-term Borrowings - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Short-term Borrowings - Schedule of Lines of Credit (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Short-term Borrowings - Schedule of Weighted Average Daily Amounts of Borrowings Outstanding and Weighted Average Interest Rates (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Commitments and Contingent Liabilities - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Commitments and Contingent Liabilities - Schedule of Purchased Water Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Employee Benefit Plans - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Employee Benefit Plans - Schedule of Employee Retirement Benefit Plans (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Revenue Recognition from Contracts with Customers (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Supplemental Cash Flows Information (Details) link:presentationLink link:calculationLink link:definitionLink