Segment Financial Information (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Segment Financial Information [Table Text Block]

The following tables present reportable segment financial information:

			Optum
(in millions)	UnitedHealthcare		OptumHealth		OptumInsight		OptumRx		Optum Eliminations			Optum		Corporate and Eliminations			Consolidated
Three Months Ended March 31, 2019
Revenues - unaffiliated customers:
Premiums	$	46,501	$	1,012	$	—	$	—	$	—		$	1,012	$	—		$	47,513
Products	—		8		23		8,041		—			8,072		—			8,072
Services	2,141		1,274		754		149		—			2,177		—			4,318
Total revenues - unaffiliated customers	48,642		2,294		777		8,190		—			11,261		—			59,903
Total revenues - affiliated customers	—		4,287		1,407		9,613		(359		)	14,948		(14,948		)	—
Investment and other income	254		132		5		14		—			151		—			405
Total revenues	$	48,896	$	6,713	$	2,189	$	17,817	$	(359	)	$	26,360	$	(14,948	)	$	60,308
Earnings from operations	$	2,954	$	626	$	432	$	820	$	—		$	1,878	$	—		$	4,832
Interest expense	—		—		—		—		—			—		(400		)	(400		)
Earnings before income taxes	$	2,954	$	626	$	432	$	820	$	—		$	1,878	$	(400	)	$	4,432
Three Months Ended March 31, 2018
Revenues - unaffiliated customers:
Premiums	$	43,237	$	847	$	—	$	—	$	—		$	847	$	—		$	44,084
Products	—		12		23		6,667		—			6,702		—			6,702
Services	2,039		1,188		740		137		—			2,065		—			4,104
Total revenues - unaffiliated customers	45,276		2,047		763		6,804		—			9,614		—			54,890
Total revenues - affiliated customers	—		3,606		1,304		9,295		(333		)	13,872		(13,872		)	—
Investment and other income	183		106		2		7		—			115		—			298
Total revenues	$	45,459	$	5,759	$	2,069	$	16,106	$	(333	)	$	23,601	$	(13,872	)	$	55,188
Earnings from operations	$	2,400	$	488	$	395	$	770	$	—		$	1,653	$	—		$	4,053
Interest expense	—		—		—		—		—			—		(329		)	(329		)
Earnings before income taxes	$	2,400	$	488	$	395	$	770	$	—		$	1,653	$	(329	)	$	3,724