GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Changes in Carrying Amount of Goodwill By Reportable Segments (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 9,631
Acquisitions	0
Goodwill, ending balance	9,631
Insurance
Goodwill [Roll Forward]
Goodwill, beginning balance	2,663
Acquisitions	0
Goodwill, ending balance	2,663
CenterWell
Goodwill [Roll Forward]
Goodwill, beginning balance	6,968
Acquisitions	0
Goodwill, ending balance	$ 6,968