Quarterly Data - Schedule of Quarterly Financial Information (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended							3 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2012		Jun. 28, 2013	Mar. 31, 2013 SKY Network Television Ltd. [Member]	Jun. 30, 2013 SKY Network Television Ltd. [Member]
Schedule Of Quarterly Financial Information [Line Items]
Gain on CMH transaction		$ 1,300	$ 0	[1]	$ 1,263	[1]	$ 0	[1]
Gain on sale of investment										321	321
Impairment charges	$ 1,400		$ 14		$ 1,138		$ 2,153
Common stock issued									579

[1] See Note 3-Acquisitions, Disposals and Other Transactions