Other Non-Operating Income (Expense) (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended		0 Months Ended	3 Months Ended
	Sep. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014 Berkshire Exchange Transaction [Member] Berkshire Hathaway Inc [Member]	Sep. 30, 2014 Cable [Member] Wireless Licenses [Member]
Schedule of Investments [Line Items]
Gain on sale of intangible assets	$ 75,249		$ 0	$ 75,249	$ 0		$ 75,200
Gain on Berkshire marketable equity securities exchange	0		0	266,733	0	266,700
Foreign currency gain (loss), net	(10,564)		7,886	(2,618)	(9,350)
Gain on sale of headquarters building	0	127,700	0	127,670	0
(Losses) gain on sales or write-down of marketable equity securities	0		0	(3,044)	879
Other, net	(159)		224	1,923	(360)
Total Other Non-Operating Income (Expense)	$ 64,526		$ 8,110	$ 465,913	$ (8,831)