Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Parenthetical) (Detail) (21st Century Fox [Member], USD $)	1 Months Ended	3 Months Ended
	Jun. 30, 2013	Mar. 31, 2014
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Preferred stock dividend payable period		Payable quarterly
Preferred stock sold	4,000
Preferred stock, par value	$ 5,000
Preferred stock dividend rate	9.50%
Minimum [Member] | Call Option [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Preferred stock redemption period	5 years
Minimum [Member] | Put Option [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Preferred stock redemption period	10 years