Segment Financial Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Segment Financial Information [Table Text Block]

The following table presents the reportable segment financial information:

			Optum
(in millions)	UnitedHealthcare		OptumHealth		OptumInsight		OptumRx		Optum Eliminations			Optum		Corporate and Eliminations			Consolidated
2017
Revenues - unaffiliated customers:
Premiums	$	154,709	$	3,744	$	—	$	—	$	—		$	3,744	$	—		$	158,453
Products	—		44		106		26,216		—			26,366		—			26,366
Services	7,890		4,013		2,849		565		—			7,427		—			15,317
Total revenues - unaffiliated customers	162,599		7,801		2,955		26,781		—			37,537		—			200,136
Total revenues - affiliated customers	—		12,429		5,127		36,954		(1,227		)	53,283		(53,283		)	—
Investment and other income	658		340		5		20		—			365		—			1,023
Total revenues	$	163,257	$	20,570	$	8,087	$	63,755	$	(1,227	)	$	91,185	$	(53,283	)	$	201,159
Earnings from operations	$	8,498	$	1,823	$	1,770	$	3,118	$	—		$	6,711	$	—		$	15,209
Interest expense	—		—		—		—		—			—		(1,186		)	(1,186		)
Earnings before income taxes	$	8,498	$	1,823	$	1,770	$	3,118	$	—		$	6,711	$	(1,186	)	$	14,023
Total assets	$	76,676	$	26,931	$	11,273	$	29,551	$	—		$	67,755	$	(5,373	)	$	139,058
Purchases of property, equipment and capitalized software	737		510		588		188		—			1,286		—			2,023
Depreciation and amortization	758		380		614		493		—			1,487		—			2,245
2016
Revenues - unaffiliated customers:
Premiums	$	140,455	$	3,663	$	—	$	—	$	—		$	3,663	$	—		$	144,118
Products	1		48		103		26,506		—			26,657		—			26,658
Services	7,514		2,498		2,670		554		—			5,722		—			13,236
Total revenues - unaffiliated customers	147,970		6,209		2,773		27,060		—			36,042		—			184,012
Total revenues - affiliated customers	—		10,491		4,559		33,372		(1,088		)	47,334		(47,334		)	—
Investment and other income	611		208		1		8		—			217		—			828
Total revenues	$	148,581	$	16,908	$	7,333	$	60,440	$	(1,088	)	$	83,593	$	(47,334	)	$	184,840
Earnings from operations	$	7,307	$	1,428	$	1,513	$	2,682	$	—		$	5,623	$	—		$	12,930
Interest expense	—		—		—		—		—			—		(1,067		)	(1,067		)
Earnings before income taxes	$	7,307	$	1,428	$	1,513	$	2,682	$	—		$	5,623	$	(1,067	)	$	11,863
Total assets	$	70,505	$	18,656	$	9,017	$	29,066	$	—		$	56,739	$	(4,434	)	$	122,810
Purchases of property, equipment and capitalized software	640		345		571		149		—			1,065		—			1,705
Depreciation and amortization	724		297		559		475		—			1,331		—			2,055
2015
Revenues - unaffiliated customers:
Premiums	$	124,011	$	3,152	$	—	$	—	$	—		$	3,152	$	—		$	127,163
Products	2		31		108		17,171		—			17,310		—			17,312
Services	6,776		2,375		2,390		381		—			5,146		—			11,922
Total revenues - unaffiliated customers	130,789		5,558		2,498		17,552		—			25,608		—			156,397
Total revenues - affiliated customers	—		8,216		3,697		30,718		(791		)	41,840		(41,840		)	—
Investment and other income	554		153		1		2		—			156		—			710
Total revenues	$	131,343	$	13,927	$	6,196	$	48,272	$	(791	)	$	67,604	$	(41,840	)	$	157,107
Earnings from operations	$	6,754	$	1,240	$	1,278	$	1,749	$	—		$	4,267	$	—		$	11,021
Interest expense	—		—		—		—		—			—		(790		)	(790		)
Earnings before income taxes	$	6,754	$	1,240	$	1,278	$	1,749	$	—		$	4,267	$	(790	)	$	10,231
Total assets	$	64,212	$	14,600	$	8,335	$	26,844	$	—		$	49,779	$	(2,737	)	$	111,254
Purchases of property, equipment and capitalized software	653		252		572		79		—			903		—			1,556
Depreciation and amortization	718		251		492		232		—			975		—			1,693