Other Non-Operating Income (Expense) (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Schedule of Investments [Line Items]
Gain on Berkshire marketable equity securities exchange	$ 266,733	$ 0	$ 266,733	$ 0
Gain on sale of headquarters building	0	0	127,670	0
Foreign currency gain (loss), net	2,909	(12,622)	7,946	(17,236)
(Losses) gains on sales or write-downs of marketable equity securities	(2,259)	337	(3,044)	879
Other, net	731	(573)	2,082	(584)
Total Other Non-Operating Income (Expense)	268,114	(12,858)	401,387	(16,941)
Berkshire Exchange Transaction [Member] | Berkshire Hathaway Inc [Member]
Schedule of Investments [Line Items]
Gain on Berkshire marketable equity securities exchange	$ 266,733