Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of identified intangible assets, by major class

The following table provides the details of identified intangible assets, by major class, for the periods indicated:

	Cost		Accumulated Amortization		Net Balance
	(In millions)
Intangible assets:
Contract rights and licenses	$	224	$	120	$	104
Customer relationships	25		23		2
Contract backlog	24		24		—
Provider networks	27		11		16
Balance at December 31, 2015	$	300	$	178	$	122
Intangible assets:
Contract rights and licenses	$	182	$	105	$	77
Customer relationships	25		23		2
Contract backlog	24		23		1
Provider networks	18		9		9
Balance at December 31, 2014	$	249	$	160	$	89

Changes in the carrying amount of goodwill

The following table presents the balances of goodwill as of December 31, 2015 and 2014:

	December 31, 2014			Acquisitions by Segment				December 31, 2015
				Health Plans		Other
	(In millions)
Goodwill, gross	$	330		$	90	$	157	$	577
Accumulated impairment losses	(58		)	—		—		(58		)
Goodwill, net	$	272		$	90	$	157	$	519