| **Basis Of Presentation**            | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
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| **Basis Of Presentation [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| Basis Of Presentation                | Note 1 – Basis of Presentation 

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The accompanying consolidated balance sheets and statements of capitalization of Aqua America, Inc. and subsidiaries (the “Company”) at June 30, 2018, the consolidated statements of net income and comprehensive income for the three and six months ended June 30, 2018 and 2017 the consolidated statements of cash flow for the six months ended June 30, 2018 and 2017, and the consolidated statement of equity for the six months ended June 30, 2018 are unaudited, but reflect all adjustments, consisting of only normal recurring accruals, which are, in the opinion of management, necessary to present a fair statement of its consolidated financial position, consolidated changes in equity, consolidated results of operations, and consolidated cash flow for the periods presented.  Because they cover interim periods, the statements and related notes to the financial statements do not include all disclosures and notes normally provided in annual financial statements and, therefore, should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.  The results of operations for interim periods may not be indicative of the results that may be expected for the entire year.  The December 31, 2017 consolidated balance sheet data presented herein was derived from the Company’s December 31, 2017 audited consolidated financial statements, but does not include all disclosures and notes normally provided in annual financial statements.  Certain prior period amounts have been reclassified to conform to the current period presentation in the consolidated statements of net income as a result of the adoption, in the first quarter of 2018, of the Financial Accounting Standards Board’s (“FASB”) accounting guidance on the presentation of net periodic pension and postretirement benefit cost (refer to Note 16 – Recent Accounting Pronouncements).

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The preparation of financial statements often requires the selection of specific accounting methods and policies.  Further, significant estimates and judgments may be required in selecting and applying those methods and policies in the recognition of the assets and liabilities in its consolidated balance sheets, the revenues and expenses in its consolidated statements of net income, and the information that is contained in its summary of significant accounting policies and notes to consolidated financial statements.  Making these estimates and judgments requires the analysis of information concerning events that may not yet be complete and of facts and circumstances that may change over time.  Accordingly, actual amounts or future results can differ materially from those estimates that the Company includes currently in its consolidated financial statements, summary of significant accounting policies, and notes. 

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There have been no changes to the summary of significant accounting policies, other than as described in Note 2 – Revenue Recognition as a result of the adoption of a new accounting pronouncement adopted on January 1, 2018, previously identified in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017. 

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| - Definition
The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.
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