Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net earnings	$ 12,382	$ 10,823	$ 7,073
Other comprehensive (loss) income:
Gross unrealized (losses) gains on investment securities during the period	(294)	209	(73)
Income tax effect	67	(72)	26
Total unrealized (losses) gains, net of tax	(227)	137	(47)
Gross reclassification adjustment for net realized gains included in net earnings	(62)	(83)	(166)
Income tax effect	14	30	60
Total reclassification adjustment, net of tax	(48)	(53)	(106)
Total foreign currency translation (losses) gains	(1,242)	(70)	806
Other comprehensive (loss) income	(1,517)	14	653
Comprehensive income	10,865	10,837	7,726
Comprehensive income attributable to noncontrolling interests	(396)	(265)	(56)
Comprehensive income attributable to UnitedHealth Group common shareholders	$ 10,469	$ 10,572	$ 7,670