Other Information - Barter and Trade Revenues and Expenses from Continuing Operations (Detail) - USD ($) $ in Millions |
3 Months Ended | |
---|---|---|
Mar. 31, 2016 |
Dec. 31, 2015 |
|
Barter and trade revenues | $ 46.3 | $ 32.7 |
Barter and trade expenses | 34.3 | $ 28.8 |
Advertising Exchanged for Equity Interests [Member] | ||
Barter and trade revenues | 11.7 | |
Barter and trade expenses | $ 0.0 |