GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Carrying Amount of Goodwill by Reportable Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Beginning balance	$ 9,142	$ 11,092
Acquisitions	408	381
Dispositions		(2,331)
Ending balance	9,550	9,142
Insurance
Goodwill [Roll Forward]
Beginning balance	2,472	2,290
Acquisitions	191	182
Dispositions		0
Ending balance	2,663	2,472
CenterWell
Goodwill [Roll Forward]
Beginning balance	6,670	8,802
Acquisitions	217	199
Dispositions		(2,331)
Ending balance	$ 6,887	$ 6,670