GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

6 Months Ended

Jun. 30, 2018

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 six months ended June 30, 2018 were as follows:

	Retail		Group and Specialty		Healthcare Services		Total
	(in millions)
Balance at January 1, 2018	$	1,059	$	261	$	1,961	$	3,281
Acquisitions	476		—		138		614
Balance at June 30, 2018	$	1,535	$	261	$	2,099	$	3,895

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 condensed consolidated balance sheets at June 30, 2018 and December 31, 2017.

		June 30, 2018						December 31, 2017
	Weighted Average Life	Cost		Accumulated Amortization		Net		Cost		Accumulated Amortization		Net
		($ in millions)
Other intangible assets:
Customer contracts/ relationships	8.7 years	$	646	$	404	$	242	$	566	$	401	$	165
Trade names and technology	6.4 years	84		80		4		104		84		20
Provider contracts	11.9 years	68		34		34		68		30		38
Noncompetes and other	8.1 years	34		30		4		32		29		3
Total other intangible assets	8.7 years	$	832	$	548	$	284	$	770	$	544	$	226

Schedule of Estimated Amortization Expense

The following table presents our estimate of amortization expense for 2018 and each of the five next succeeding years:

	(in millions)
For the years ending December 31,
2018	$	91
2019	72
2020	69
2021	36
2022	26
2023	16