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Other Information - Barter and Trade Revenues and Expenses from Continuing Operations (Detail) - USD ($) $ in Millions | 3 Months Ended
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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 |

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- Definition Total expense recognized from advertising barter transactions for each income statement presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51667831&loc=d3e49171-111630 + Details
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- Definition Total revenue recognized from advertising barter transactions for each income statement presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51667831&loc=d3e49171-111630 + Details
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- Details
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