GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill By Reportable Segments

Changes in the carrying amount of goodwill for our reportable segments for the years ended December 31, 2016 and 2015 were as follows:

	Retail		Group and Specialty		Healthcare Services			Total
	(in millions)
Balance at January 1, 2015	$	1,059	$	261	$	1,911		$	3,231
Acquisitions	—		—		35			35
Dispositions	—		—		(1		)	(1		)
Balance at December 31, 2015	1,059		261		1,945			3,265
Acquisitions	—		—		7			7
Balance at December 31, 2016	$	1,059	$	261	$	1,952		$	3,272

Details of Intangible Assets Included in Other Long-Term Assets

The following table presents details of our other intangible assets included in other long-term assets in the accompanying consolidated balance sheets at December 31, 2016 and 2015.

	Weighted Average Life	2016						2015
		Cost		Accumulated Amortization		Net		Cost		Accumulated Amortization		Net
		(in millions)
Other intangible assets:
Customer contracts/relationships	9.8 years	$	566	$	347	$	219	$	566	$	292	$	274
Trade names and technology	8.3 years	104		69		35		104		54		50
Provider contracts	14.7 years	51		29		22		51		24		27
Noncompetes and other	8.2 years	32		28		4		32		26		6
Total other intangible assets	9.9 years	$	753	$	473	$	280	$	753	$	396	$	357

Schedule of Estimated Amortization Expense

The following table presents our estimate of amortization expense for each of the five next succeeding fiscal years:

	(in millions)
For the years ending December 31,
2017	$	71
2018	63
2019	52
2020	48
2021	14