Annual report pursuant to Section 13 and 15(d)

Impairment of Goodwill and Other Indefinite-Lived Intangible Assets - Additional Information (Detail)

v2.4.0.6
Impairment of Goodwill and Other Indefinite-Lived Intangible Assets - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
1 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Jun. 30, 2012
Dec. 31, 2012
Dec. 31, 2012
Networks
Dec. 31, 2011
Networks
Dec. 31, 2010
Networks
Dec. 31, 2012
Mastheads
Dec. 31, 2012
Mastheads
Publishing segment
Dec. 31, 2012
Broadcast licenses
Goodwill And Other Intangible Assets [Line Items]                  
Percentage of indefinite-lived intangible assets out of total assets     71.00%            
Percentage of indefinite-lived intangible assets             6.00%   94.00%
Broadcast licenses renewal period     8 years            
Impairment charges $ 1.2 $ 5.6           $ 0.1  
Excess of estimated fair value over carrying value, percentage       120.00% 101.60% 98.60%