Basis of Presentation and Summary	3 Months Ended
Mar. 31, 2016
Basis of Presentation and Summary [Abstract]
Basis of Presentation and Summary	1.BASIS OF PRESENTATION AND SUMMARY The accompanying condensed consolidated financial statements relate to Waste Connections, Inc. and its subsidiaries (“WCI” or the “Company”) for the three month periods ended March 31, 2016 and 2015. In the opinion of management, the accompanying balance sheets and related interim statements of net income, comprehensive income, cash flows and equity include all adjustments, consisting only of normal recurring items, necessary for their fair statement in conformity with U.S. generally accepted accounting principles (“GAAP”). Preparing financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. Examples include accounting for landfills, self-insurance accruals, income taxes, allocation of acquisition purchase price, contingent consideration accruals and asset impairments. An additional area that involves estimation is when the Company estimates the amount of potential exposure it may have with respect to litigation, claims and assessments in accordance with the accounting guidance on contingencies. Actual results for all estimates could differ materially from the estimates and assumptions that the Company uses in the preparation of its condensed consolidated financial statements. Interim results are not necessarily indicative of results for a full year. These interim financial statements should be read in conjunction with the financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2015. As further discussed in Note 7 - “Acquisitions,” on January 18, 2016, Waste Connections, Inc. entered into an Agreement and Plan of Merger (the “Merger Agreement”), with Progressive Waste Solutions Ltd. (“Progressive”), a corporation organized under the laws of Ontario, Canada, and Water Merger Sub LLC, a Delaware limited liability company and wholly-owned subsidiary of Progressive (“Merger Sub”). Pursuant to the Merger Agreement, Progressive will combine with the Company in an all-stock merger. Merger Sub will merge with and into Waste Connections, Inc. (referred to as the ‘‘Merger’’), with Waste Connections, Inc. continuing as the surviving corporation. Following the Merger, Waste Connections, Inc. will be a subsidiary of Progressive and the Company’s common stock will be delisted from the New York Stock Exchange (“NYSE”) and deregistered under the Exchange Act. Pursuant to the Merger, the Company’s stockholders will receive Progressive common shares in exchange for their shares of the Company’s common stock and will become Progressive shareholders. Immediately following the Merger, Progressive intends to change its legal name to “Waste Connections, Inc.” and its common shares are expected to trade on the NYSE and the Toronto Stock Exchange (“TSX”) under the symbol “WCN”. The accompanying consolidated financial statements, of which these notes are an integral part, do not reflect any effects that would result if the transaction contemplated by the Merger Agreement is consummated.

1.BASIS OF PRESENTATION AND SUMMARY

The accompanying condensed consolidated financial statements relate to Waste Connections, Inc. and its subsidiaries (“WCI” or the “Company”) for the three month periods ended March 31, 2016 and 2015. In the opinion of management, the accompanying balance sheets and related interim statements of net income, comprehensive income, cash flows and equity include all adjustments, consisting only of normal recurring items, necessary for their fair statement in conformity with U.S. generally accepted accounting principles (“GAAP”). Preparing financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. Examples include accounting for landfills, self-insurance accruals, income taxes, allocation of acquisition purchase price, contingent consideration accruals and asset impairments. An additional area that involves estimation is when the Company estimates the amount of potential exposure it may have with respect to litigation, claims and assessments in accordance with the accounting guidance on contingencies. Actual results for all estimates could differ materially from the estimates and assumptions that the Company uses in the preparation of its condensed consolidated financial statements.

Interim results are not necessarily indicative of results for a full year. These interim financial statements should be read in conjunction with the financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2015.

As further discussed in Note 7 - “Acquisitions,” on January 18, 2016, Waste Connections, Inc. entered into an Agreement and Plan of Merger (the “Merger Agreement”), with Progressive Waste Solutions Ltd. (“Progressive”), a corporation organized under the laws of Ontario, Canada, and Water Merger Sub LLC, a Delaware limited liability company and wholly-owned subsidiary of Progressive (“Merger Sub”). Pursuant to the Merger Agreement, Progressive will combine with the Company in an all-stock merger. Merger Sub will merge with and into Waste Connections, Inc. (referred to as the ‘‘Merger’’), with Waste Connections, Inc. continuing as the surviving corporation. Following the Merger, Waste Connections, Inc. will be a subsidiary of Progressive and the Company’s common stock will be delisted from the New York Stock Exchange (“NYSE”) and deregistered under the Exchange Act. Pursuant to the Merger, the Company’s stockholders will receive Progressive common shares in exchange for their shares of the Company’s common stock and will become Progressive shareholders. Immediately following the Merger, Progressive intends to change its legal name to “Waste Connections, Inc.” and its common shares are expected to trade on the NYSE and the Toronto Stock Exchange (“TSX”) under the symbol “WCN”. The accompanying consolidated financial statements, of which these notes are an integral part, do not reflect any effects that would result if the transaction contemplated by the Merger Agreement is consummated.