GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 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 three months ended March 31, 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	360		—		119		479
Balance at March 31, 2018	$	1,419	$	261	$	2,080	$	3,760

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 March 31, 2018 and December 31, 2017.

		March 31, 2018						December 31, 2017
	Weighted Average Life	Cost		Accumulated Amortization		Net		Cost		Accumulated Amortization		Net
		($ in millions)
Other intangible assets:
Customer contracts/ relationships	9.6 years	$	646	$	414	$	232	$	566	$	401	$	165
Trade names and technology	6.5 years	83		78		5		104		84		20
Provider contracts	11.9 years	68		32		36		68		30		38
Noncompetes and other	8.1 years	32		29		3		32		29		3
Total other intangible assets	9.4 years	$	829	$	553	$	276	$	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	$	84
2019	63
2020	61
2021	27
2022	24
2023	16