Related Party Transactions and 21st Century Fox Investment - Additional Information (Detail) (USD $)	6 Months Ended					3 Months Ended		6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013	Jun. 28, 2013	Jun. 30, 2012	Sep. 30, 2013 21st Century Fox [Member]	Dec. 31, 2012 21st Century Fox [Member]	Dec. 31, 2012 21st Century Fox [Member]
Related Party Transaction [Line Items]
Estimated cash and cash equivalents at distribution date				$ 2,600,000,000
Cash and cash equivalents	2,908,000,000	741,000,000	2,381,000,000		1,133,000,000
Cash distribution from related party	217,000,000	2,115,000,000				200,000,000
Corporate allocations							49,000,000	111,000,000
General corporate expenses							21,000,000	47,000,000
Historical direct allocations							$ 28,000,000	$ 64,000,000