0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONSOLIDATED BALANCE SHEETS (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 9952159 - Statement - CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Organization, Summary of Significant Accounting Policies and Recent Developments link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Rates and Regulatory Matters link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Commitments and Contingent Liabilities link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Short-term Borrowings link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Capitalization link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Employee Benefit Plans link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Business Segment Data link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Supplemental Cash Flows Information link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Organization, Summary of Significant Accounting Policies and Recent Developments (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Organization, Summary of Significant Accounting Policies and Recent Developments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Rates and Regulatory Matters (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Commitments and Contingent Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Short-term Borrowings (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Capitalization (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Employee Benefit Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Business Segment Data (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Supplemental Cash Flows Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Organization, Summary of Significant Accounting Policies and Recent Developments - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Organization, Summary of Significant Accounting Policies and Recent Developments - Schedule of Range of Depreciation Rates for the Major Utility Plant Categories (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Organization, Summary of Significant Accounting Policies and Recent Developments - Schedule of AFUDC Rates for Middlesex and Tidewater (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Organization, Summary of Significant Accounting Policies and Recent Developments - Schedule of Operating Revenues (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Rates and Regulatory Matters - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Rates and Regulatory Matters - Schedule of Regulatory Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Income Taxes - Schedule of Income Tax Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Income Taxes - Schedule of Paid Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Income Taxes - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Income Taxes - Schedule of Deferred Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Commitments and Contingent Liabilities - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Commitments and Contingent Liabilities - Schedule of Purchased Water Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Commitments and Contingent Liabilities - Schedule of Operating Lease ROU Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Commitments and Contingent Liabilities - Schedule of Future Minimum Operating Lease Commitments (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Commitments and Contingent Liabilities - Schedule of Future Minimum Operating Lease Commitments (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Short-term Borrowings - Schedule of Short-Term Borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Short-term Borrowings - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Short-Term Borrowings - Schedule of Lines of Credit (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Capitalization - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Capitalization - Schedule of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Capitalization - Schedule of Basic and Diluted Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Capitalization - Schedule of Carrying Amount and Fair Value of the Bonds (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Employee Benefit Plans - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Employee Benefit Plans - Schedule of Employee Retirement Benefit Plans (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Employee Benefit Plans - Schedule of Change in Fair Value of Plan Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Employee Benefit Plans - Schedule of Employee Benefit Plans Recognized in Balance Sheet (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Employee Benefit Plans - Schedule of Components of Net Benefit (Gain) Cost (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Employee Benefit Plans - Schedule of Regulatory Assets into Net Periodic Benefit Cost (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Employee Benefit Plans - Schedule of Discount and Compensation Rates (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Employee Benefit Plans - Schedule of Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Employee Benefit Plans - Schedule of Expected Benefit Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Employee Benefit Plans - Schedule of Allocation of Plan Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Employee Benefit Plans - Schedule of Fair Value of Plan Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Employee Benefit Plans - Schedule of Table Presents Awarded but not Yet Vested Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Business Segment Data - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Business Segment Data - Schedule of Segment Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Supplemental Cash Flows Information (Details) link:presentationLink link:calculationLink link:definitionLink