Prior period adjustments in the current period, to correct an error in previously issued financial statements.

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 35
-Section 50
-Paragraph 1
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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 2
-Subparagraph (b)
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Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

+ References

No definition available.

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- Definition

The amount of other than temporary impairment losses on investments in debt and equity securities categorized as Available-for-sale which have been recognized in earnings during the period. Such impairment losses consist of other than temporary impairments (OTTI) on equity securities, credit losses on investments in debt securities, and when the entity intends to sell an impaired debt security or it is more likely than not that the entity will be required to sell the impaired debt security before recovery of its amortized cost basis.

+ References

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-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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Summary of Significant Accounting Policies (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Impairment	$ 0.0	$ 0.0
Other than temporary impairment for available for sale securities	5.0	0.0	$ 0.0
Advertising expenses	129.1	$ 103.0	133.7
Accounting Standards Update - recognition, measurement and disclosure of discontinued operations
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0.0
Accounting Standards Update - Balance Sheet Classification of Deferred Taxes
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0.0
International Outdoor Advertising [Member]
Impairment			$ 10.7
Netherlands Subsidiary [Member] \| Operating Expense [Member]
Prior period adjustments recorded in the current period	8.2
Netherlands Subsidiary [Member] \| Selling, General and Administrative Expenses [Member]
Prior period adjustments recorded in the current period	$ 3.2
Minimum [Member]
Percentage of ownership	20.00%
Minimum [Member] \| Building and Improvements [Member]
Useful life	10 years
Minimum [Member] \| Structures [Member]
Useful life	5 years
Minimum [Member] \| Towers, Transmitters and Studio Equipment [Member]
Useful life	7 years
Minimum [Member] \| Furniture and other equipment [Member]
Useful life	3 years
Maximum [Member]
Percentage of ownership	50.00%
Maximum [Member] \| Building and Improvements [Member]
Useful life	39 years
Maximum [Member] \| Structures [Member]
Useful life	15 years
Maximum [Member] \| Towers, Transmitters and Studio Equipment [Member]
Useful life	20 years
Maximum [Member] \| Furniture and other equipment [Member]
Useful life	20 years