10-K Goodwill And Other Intangible Assets (Summary Of The Change In The Carrying Amount Of Goodwill By Reportable Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Change in the carrying amount of goodwill by reportable segment
Goodwill, after measurement period adjustments	$ 24,228	$ 21,691
Adjustments	155	2,537
Goodwill, after measurement period adjustments	24,383	24,228
Goodwill, Impaired, Accumulated Impairment Loss	0
Health Benefits Segment
Change in the carrying amount of goodwill by reportable segment
Goodwill, after measurement period adjustments	21,942	19,924
Adjustments	146	2,018
Goodwill, after measurement period adjustments	22,088	21,942
Goodwill, Impaired, Accumulated Impairment Loss	0
CarelonRx Segment [Member]
Change in the carrying amount of goodwill by reportable segment
Goodwill, after measurement period adjustments	59	48
Adjustments	0	11
Goodwill, after measurement period adjustments	59	59
Goodwill, Impaired, Accumulated Impairment Loss	0
Carelon Services Segment
Change in the carrying amount of goodwill by reportable segment
Goodwill, after measurement period adjustments	2,227	1,719
Adjustments	9	508
Goodwill, after measurement period adjustments	2,236	$ 2,227
Goodwill, Impaired, Accumulated Impairment Loss	$ 0