GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Changes in Carrying Amount of Goodwill By Reportable Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning balance	$ 9,550	$ 9,142
Acquisitions	81	408
Ending balance	9,631	9,550
Insurance
Goodwill [Roll Forward]
Beginning balance	2,663	2,472
Acquisitions	0	191
Ending balance	2,663	2,663
CenterWell
Goodwill [Roll Forward]
Beginning balance	6,887	6,670
Acquisitions	81	217
Ending balance	$ 6,968	$ 6,887