Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net earnings	$ 1,570	$ 1,557	$ 4,246	$ 4,282
Other comprehensive (loss) income:
Gross unrealized holding gains (losses) on investment securities during the period	26	166	(475)	277
Income tax effect	(9)	(54)	172	(100)
Total unrealized gains (losses), net of tax	17	112	(303)	177
Gross reclassification adjustment for net realized gains included in net earnings	(31)	(20)	(137)	(109)
Income tax effect	11	7	50	40
Total reclassification adjustment, net of tax	(20)	(13)	(87)	(69)
Total foreign currency translation (losses) gains	(49)	7	(635)	6
Other comprehensive (loss) income	(52)	106	(1,025)	114
Comprehensive income	1,518	1,663	3,221	4,396
Comprehensive income attributable to noncontrolling interests	0	0	(48)	0
Comprehensive income attributable to UnitedHealth Group common shareholders	$ 1,518	$ 1,663	$ 3,173	$ 4,396