Basis of Presentation	9 Months Ended
Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation The accompanying unaudited interim Condensed Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") for interim periods and do not include all of the information and note disclosures required by accounting principles generally accepted in the United States of America ("GAAP") for complete financial statements. These unaudited interim Condensed Consolidated Financial Statements should therefore be read in conjunction with the Consolidated Financial Statements and Notes for Dover Corporation ("Dover" or the "Company") for the year ended December 31, 2017, included in the Company's Annual Report on Form 10-K/A filed with the SEC on February 16, 2018. The year end Condensed Consolidated Balance Sheet was derived from audited financial statements. Certain amounts in the prior periods have been reclassified to conform to the current year presentation. On May 9, 2018, the Company completed a pro-rata distribution of the common stock of Apergy Corporation ("Apergy") to the Company's shareholders of record as of the close of business on April 30, 2018. Apergy holds entities conducting upstream energy businesses previously included in the Energy segment. As discussed in Note 5 - Discontinued and Disposed Operations, the Apergy businesses met the criteria to be reported as discontinued operations because the spin-off is a strategic shift in business that has a major effect on the Company's operations and financial results. Therefore, the Company is reporting the historical results of Apergy, including the results of operations, cash flows, and related assets and liabilities, as discontinued operations for all periods presented herein. Subsequent to the spin-off of Apergy, effective the second quarter of 2018, the Company no longer has the Energy segment and is aligned into three reportable segments. See Note 17 —Segment Information for additional information regarding the updated segments, including segment results for the three and nine months ended September 30, 2018 and 2017. Unless otherwise noted, the accompanying Notes to the Consolidated Financial Statements have all been revised to reflect the effect of the separation of Apergy and all prior year balances have been revised accordingly to reflect continuing operations only. The accompanying unaudited interim Condensed Consolidated Financial Statements have been prepared in accordance with U.S. GAAP, which requires management to make estimates and assumptions that affect amounts reported in the Condensed Consolidated Financial Statements and accompanying disclosures. Although these estimates are based on management’s best knowledge of current events and actions that the Company may undertake in the future, actual results may differ from those estimates. The Condensed Consolidated Financial Statements reflect all adjustments of a normal, recurring nature that are, in the opinion of management, necessary for a fair statement of results for these interim periods. The results of operations of any interim period are not necessarily indicative of the results of operations for the full year.

1. Basis of Presentation

The accompanying unaudited interim Condensed Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") for interim periods and do not include all of the information and note disclosures required by accounting principles generally accepted in the United States of America ("GAAP") for complete financial statements. These unaudited interim Condensed Consolidated Financial Statements should therefore be read in conjunction with the Consolidated Financial Statements and Notes for Dover Corporation ("Dover" or the "Company") for the year ended December 31, 2017, included in the Company's Annual Report on Form 10-K/A filed with the SEC on February 16, 2018. The year end Condensed Consolidated Balance Sheet was derived from audited financial statements. Certain amounts in the prior periods have been reclassified to conform to the current year presentation.

On May 9, 2018, the Company completed a pro-rata distribution of the common stock of Apergy Corporation ("Apergy") to the Company's shareholders of record as of the close of business on April 30, 2018. Apergy holds entities conducting upstream energy businesses previously included in the Energy segment. As discussed in Note 5 - Discontinued and Disposed Operations, the Apergy businesses met the criteria to be reported as discontinued operations because the spin-off is a strategic shift in business that has a major effect on the Company's operations and financial results. Therefore, the Company is reporting the historical results of Apergy, including the results of operations, cash flows, and related assets and liabilities, as discontinued operations for all periods presented herein. Subsequent to the spin-off of Apergy, effective the second quarter of 2018, the Company no longer has the Energy segment and is aligned into three reportable segments. See Note 17 —Segment Information for additional information regarding the updated segments, including segment results for the three and nine months ended September 30, 2018 and 2017. Unless otherwise noted, the accompanying Notes to the Consolidated Financial Statements have all been revised to reflect the effect of the separation of Apergy and all prior year balances have been revised accordingly to reflect continuing operations only.

The accompanying unaudited interim Condensed Consolidated Financial Statements have been prepared in accordance with U.S. GAAP, which requires management to make estimates and assumptions that affect amounts reported in the Condensed Consolidated Financial Statements and accompanying disclosures. Although these estimates are based on management’s best knowledge of current events and actions that the Company may undertake in the future, actual results may differ from those estimates. The Condensed Consolidated Financial Statements reflect all adjustments of a normal, recurring nature that are, in the opinion of management, necessary for a fair statement of results for these interim periods. The results of operations of any interim period are not necessarily indicative of the results of operations for the full year.