GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Carrying Amount of Goodwill by Reportable Segments (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($)
Goodwill [Roll Forward]
Balance at January 1, 2016	$ 3,265
Acquisitions	7
Balance at September 30, 2016	3,272
Retail
Goodwill [Roll Forward]
Balance at January 1, 2016	1,069
Acquisitions	0
Balance at September 30, 2016	1,069
Group
Goodwill [Roll Forward]
Balance at January 1, 2016	385
Acquisitions	0
Balance at September 30, 2016	385
Healthcare Services
Goodwill [Roll Forward]
Balance at January 1, 2016	1,811
Acquisitions	7
Balance at September 30, 2016	$ 1,818