BASIS OF PRESENTATION (Policies)	3 Months Ended
Mar. 31, 2020
Accounting Policies [Abstract]
Interim Financial Statements	Interim Financial Statements The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Quarterly Report on Form 10-Q and do not include all of the information and note disclosures required by generally accepted accounting principles in the United States of America (“US GAAP”). Amounts as of December 31, 2019 included in the unaudited condensed consolidated financial statements have been derived from audited consolidated financial statements as of that date. The accompanying unaudited condensed consolidated financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2019 filed with the Securities and Exchange Commission on February 6, 2020. Our significant accounting policies have not changed since December 31, 2019, except as noted below. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments, consisting only of normal recurring items and changes in US GAAP, necessary for their fair presentation in conformity with US GAAP for complete financial statements. The results of operations for interim periods are not necessarily indicative of the results to be expected for a full year.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates and assumptions.
Basis of Consolidation	Basis of Consolidation The unaudited condensed consolidated financial statements include the accounts of CME Ltd. and our subsidiaries, after the elimination of intercompany accounts and transactions. Entities in which we hold less than a majority voting interest but over which we have the ability to exercise significant influence are accounted for using the equity method. Other investments are accounted for using the cost method.
Seasonality	Seasonality We experience seasonality, with advertising sales tending to be lowest during the third quarter of each calendar year due to the summer holiday period (typically July and August), and highest during the fourth quarter of each calendar year due to the winter holiday season.
Recent Accounting Pronouncements	Accounting Pronouncements Adopted In June 2016, the Financial Accounting Standards Board ("FASB") issued guidance to provide financial statement users with more information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendments replaced the incurred loss impairment methodology in the legacy guidance with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The guidance primarily applies to our accounts receivable and had no material impact upon adoption as of January 1, 2020. In March 2019, the FASB issued guidance that aligns the accounting for production costs of an episodic television series with the accounting for production costs of films. The guidance further requires that an entity test a film or license agreement for program material for impairment at a film group level and under a fair value model when the film or license agreement is predominantly monetized with other films and/or license agreements. Further, content acquired under a license agreement is not required to be separately presented on the balance sheet based on the estimated time of usage. The guidance was adopted prospectively on January 1, 2020, at which time we reclassified US$ 75.9 million of our current content assets to non-current on our condensed consolidated Balance Sheets. There was no cumulative effect adjustment upon adoption. The change to a fair value model and the use of film groups in the assessment of impairment of our content is a significant change to the previously prescribed approach; however, the results of these procedures are not substantially different than the results under the previous approach. During the adoption process we identified and corrected an error in our program rights disclosure as at December 31, 2019 relating to the misclassification of certain completed and released content that had been disclosed as completed and not released. The disclosure error did not impact the consolidated balance sheets, the consolidated statements of operations and comprehensive income, the consolidated statements of equity or the consolidated statements of cash flows and was not material as at December 31, 2019. Recent Accounting Pronouncements Issued
Accounting Changes and Error Corrections [Text Block]	During the adoption process we identified and corrected an error in our program rights disclosure as at December 31, 2019 relating to the misclassification of certain completed and released content that had been disclosed as completed and not released. The disclosure error did not impact the consolidated balance sheets, the consolidated statements of operations and comprehensive income, the consolidated statements of equity or the consolidated statements of cash flows and was not material as at December 31, 2019.

BASIS OF PRESENTATION (Policies)

3 Months Ended

Mar. 31, 2020

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Quarterly Report on Form 10-Q and do not include all of the information and note disclosures required by generally accepted accounting principles in the United States of America (“US GAAP”). Amounts as of December 31, 2019 included in the unaudited condensed consolidated financial statements have been derived from audited consolidated financial statements as of that date. The accompanying unaudited condensed consolidated financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2019 filed with the Securities and Exchange Commission on February 6, 2020. Our significant accounting policies have not changed since December 31, 2019, except as noted below.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments, consisting only of normal recurring items and changes in US GAAP, necessary for their fair presentation in conformity with US GAAP for complete financial statements. The results of operations for interim periods are not necessarily indicative of the results to be expected for a full year.

Use of Estimates

The preparation of financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates and assumptions.

Basis of Consolidation

The unaudited condensed consolidated financial statements include the accounts of CME Ltd. and our subsidiaries, after the elimination of intercompany accounts and transactions. Entities in which we hold less than a majority voting interest but over which we have the ability to exercise significant influence are accounted for using the equity method. Other investments are accounted for using the cost method.

Seasonality

We experience seasonality, with advertising sales tending to be lowest during the third quarter of each calendar year due to the summer holiday period (typically July and August), and highest during the fourth quarter of each calendar year due to the winter holiday season.

Recent Accounting Pronouncements

Accounting Pronouncements Adopted

In June 2016, the Financial Accounting Standards Board ("FASB") issued guidance to provide financial statement users with more information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendments replaced the incurred loss impairment methodology in the legacy guidance with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The guidance primarily applies to our accounts receivable and had no material impact upon adoption as of January 1, 2020.

In March 2019, the FASB issued guidance that aligns the accounting for production costs of an episodic television series with the accounting for production costs of films. The guidance further requires that an entity test a film or license agreement for program material for impairment at a film group level and under a fair value model when the film or license agreement is predominantly monetized with other films and/or license agreements. Further, content acquired under a license agreement is not required to be separately presented on the balance sheet based on the estimated time of usage. The guidance was adopted prospectively on January 1, 2020, at which time we reclassified US$ 75.9 million of our current content assets to non-current on our condensed consolidated Balance Sheets. There was no cumulative effect adjustment upon adoption. The change to a fair value model and the use of film groups in the assessment of impairment of our content is a significant change to the previously prescribed approach; however, the results of these procedures are not substantially different than the results under the previous approach.

During the adoption process we identified and corrected an error in our program rights disclosure as at December 31, 2019 relating to the misclassification of certain completed and released content that had been disclosed as completed and not released. The disclosure error did not impact the consolidated balance sheets, the consolidated statements of operations and comprehensive income, the consolidated statements of equity or the consolidated statements of cash flows and was not material as at December 31, 2019.

Recent Accounting Pronouncements Issued

Accounting Changes and Error Corrections [Text Block]