Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Net earnings	$ 5,017	$ 3,366
Other comprehensive income:
Net change in unrealized appreciation of investments	9,641	11,642
Applicable income taxes	(3,326)	(4,051)
Reclassification of investment appreciation in net earnings	(504)	132
Applicable income taxes	176	(46)
Foreign currency translation	(650)	219
Applicable income taxes	51	1
Prior service cost and actuarial gains/losses of defined benefit pension plans	87	12
Applicable income taxes	(23)	(6)
Other, net	16	(20)
Other comprehensive income, net	5,468	7,883
Comprehensive income	10,485	11,249
Comprehensive income attributable to noncontrolling interests	101	141
Comprehensive income attributable to Berkshire Hathaway shareholders	$ 10,384	$ 11,108

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