Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies Unless otherwise noted in this report, any description of "we," "us" or "our" includes Molson Coors Brewing Company ("MCBC" or the "Company"), principally a holding company, and its operating and non-operating subsidiaries included within our reporting segments and Corporate. Our reporting segments include: MillerCoors LLC ("MillerCoors" or U.S. segment), operating in the United States ("U.S."); Molson Coors Canada ("MCC" or Canada segment), operating in Canada; Molson Coors Europe (Europe segment), operating in Bulgaria, Croatia, Czech Republic, Hungary, Montenegro, Republic of Ireland, Romania, Serbia, the United Kingdom ("U.K.") and various other European countries; and Molson Coors International ("MCI" or International segment), operating in various other countries. On October 11, 2016, we completed the acquisition of SABMiller plc's ("SABMiller") 58% economic interest and 50% voting interest in MillerCoors and all trademarks, contracts and other assets primarily related to the "Miller International Business," as defined in the purchase agreement, outside of the U.S. and Puerto Rico (the "Acquisition") from Anheuser-Busch InBev SA/NV ("ABI"), and MillerCoors, previously a joint venture between MCBC and SABMiller, became a wholly-owned subsidiary of MCBC. Accordingly, for periods prior to October 11, 2016, our 42% economic ownership interest in MillerCoors was accounted for under the equity method of accounting, and, therefore, its results of operations were reported as equity income in MillerCoors in the unaudited condensed consolidated statements of operations, and our 42% share of MillerCoors' net assets was reported as investment in MillerCoors in the unaudited condensed consolidated balance sheets. Beginning October 11, 2016, MillerCoors was fully consolidated and continues to be reported as our U.S. segment. Additionally, our unaudited condensed consolidated balance sheets as of September 30, 2017, and December 31, 2016, include our acquired assets and liabilities, which were recorded at their respective acquisition-date fair values upon completion of the Acquisition. See Note 4, "Acquisition and Investments" for further discussion. Unless otherwise indicated, information in this report is presented in U.S. dollars ("USD" or "$") and comparisons are to comparable prior periods. Our primary operating currencies, other than USD, include the Canadian Dollar ("CAD"), the British Pound ("GBP"), and our Central European operating currencies such as the Euro ("EUR"), Czech Koruna ("CZK"), Croatian Kuna ("HRK") and Serbian Dinar ("RSD"). The accompanying unaudited condensed consolidated interim financial statements reflect all adjustments which are necessary for a fair statement of the financial position, results of operations and cash flows for the periods presented in accordance with accounting principles generally accepted in the U.S. ("U.S. GAAP"). Such unaudited interim condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. These unaudited condensed consolidated interim financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2016 ("Annual Report"), and have been prepared on a consistent basis with the accounting policies described in Note 1 of the Notes to the Audited Consolidated Financial Statements included in our Annual Report. Our accounting policies did not change in the first three quarters of 2017. The results of operations for the three and nine months ended September 30, 2017, are not necessarily indicative of the results that may be achieved for the full year.

Basis of Presentation and Summary of Significant Accounting Policies

Unless otherwise noted in this report, any description of "we," "us" or "our" includes Molson Coors Brewing Company ("MCBC" or the "Company"), principally a holding company, and its operating and non-operating subsidiaries included within our reporting segments and Corporate. Our reporting segments include: MillerCoors LLC ("MillerCoors" or U.S. segment), operating in the United States ("U.S."); Molson Coors Canada ("MCC" or Canada segment), operating in Canada; Molson Coors Europe (Europe segment), operating in Bulgaria, Croatia, Czech Republic, Hungary, Montenegro, Republic of Ireland, Romania, Serbia, the United Kingdom ("U.K.") and various other European countries; and Molson Coors International ("MCI" or International segment), operating in various other countries.

On October 11, 2016, we completed the acquisition of SABMiller plc's ("SABMiller") 58% economic interest and 50% voting interest in MillerCoors and all trademarks, contracts and other assets primarily related to the "Miller International Business," as defined in the purchase agreement, outside of the U.S. and Puerto Rico (the "Acquisition") from Anheuser-Busch InBev SA/NV ("ABI"), and MillerCoors, previously a joint venture between MCBC and SABMiller, became a wholly-owned subsidiary of MCBC. Accordingly, for periods prior to October 11, 2016, our 42% economic ownership interest in MillerCoors was accounted for under the equity method of accounting, and, therefore, its results of operations were reported as equity income in MillerCoors in the unaudited condensed consolidated statements of operations, and our 42% share of MillerCoors' net assets was reported as investment in MillerCoors in the unaudited condensed consolidated balance sheets. Beginning October 11, 2016, MillerCoors was fully consolidated and continues to be reported as our U.S. segment. Additionally, our unaudited condensed consolidated balance sheets as of September 30, 2017, and December 31, 2016, include our acquired assets and liabilities, which were recorded at their respective acquisition-date fair values upon completion of the Acquisition. See Note 4, "Acquisition and Investments" for further discussion.

Unless otherwise indicated, information in this report is presented in U.S. dollars ("USD" or "$") and comparisons are to comparable prior periods. Our primary operating currencies, other than USD, include the Canadian Dollar ("CAD"), the British Pound ("GBP"), and our Central European operating currencies such as the Euro ("EUR"), Czech Koruna ("CZK"), Croatian Kuna ("HRK") and Serbian Dinar ("RSD").

The accompanying unaudited condensed consolidated interim financial statements reflect all adjustments which are necessary for a fair statement of the financial position, results of operations and cash flows for the periods presented in accordance with accounting principles generally accepted in the U.S. ("U.S. GAAP"). Such unaudited interim condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations.

These unaudited condensed consolidated interim financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2016 ("Annual Report"), and have been prepared on a consistent basis with the accounting policies described in Note 1 of the Notes to the Audited Consolidated Financial Statements included in our Annual Report. Our accounting policies did not change in the first three quarters of 2017.

The results of operations for the three and nine months ended September 30, 2017, are not necessarily indicative of the results that may be achieved for the full year.