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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2017
Accounting Policies [Abstract] |
Schedule of Barter and Trade Revenues and Expenses | Trade and barter revenues and expenses from continuing operations were as follows:
(In millions) | Years Ended December 31,
| 2017 |  | 2016 |  | 2015
Trade and barter revenues | $ | 243.3 |  |  | $ | 165.8 |  |  | $ | 133.5 |
Trade and barter expenses | 205.1 |  |  | 115.1 |  |  | 112.1 |

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