Segment Information - Financial Data by Reportable Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Premiums	$ 164,639	$ 144,166	$ 142,854
Operating revenue - total	197,584	175,204	170,209
Benefit expense	148,223	127,567	124,330
Cost of products sold	21,178	19,750	17,293
Operating expense	20,984	20,025	20,087
Operating gain (loss)	7,199	7,862	8,499
Product revenue
Segment Reporting Information [Line Items]
Product and service revenue	24,470	22,630	19,452
Service fees
Segment Reporting Information [Line Items]
Product and service revenue	8,475	8,408	7,903
Eliminations
Segment Reporting Information [Line Items]
Premiums	(1,134)	(1,132)	(340)
Operating revenue - total	(41,689)	(29,302)	(26,823)
Benefit expense	(19,974)	(13,543)	(10,020)
Cost of products sold	(18,899)	(13,228)	(14,295)
Operating expense	(2,816)	(2,531)	(2,508)
Operating gain (loss)	0	0	0
Eliminations | Product revenue
Segment Reporting Information [Line Items]
Product and service revenue	0	0	0
Eliminations | Service fees
Segment Reporting Information [Line Items]
Product and service revenue	0	0	0
Health Benefits | Operating Segments
Segment Reporting Information [Line Items]
Premiums	159,458	142,668	141,515
Operating revenue - total	167,094	150,275	148,571
Benefit expense	143,889	126,703	123,705
Cost of products sold	0	0	0
Operating expense	19,047	17,329	17,978
Operating gain (loss)	4,158	6,243	6,888
Health Benefits | Operating Segments | Product revenue
Segment Reporting Information [Line Items]
Product and service revenue	0	0	0
Health Benefits | Operating Segments | Service fees
Segment Reporting Information [Line Items]
Product and service revenue	7,636	7,607	7,056
Total | Operating Segments
Segment Reporting Information [Line Items]
Premiums	6,315	2,630	1,679
Operating revenue - total	71,716	53,922	47,982
Benefit expense	24,283	14,388	10,610
Cost of products sold	40,077	32,978	31,588
Operating expense	3,978	3,667	3,129
Operating gain (loss)	3,378	2,889	2,655
Total | Operating Segments | Product revenue
Segment Reporting Information [Line Items]
Product and service revenue	24,470	22,630	19,452
Total | Operating Segments | Service fees
Segment Reporting Information [Line Items]
Product and service revenue	839	795	819
CarelonRx | Operating Segments
Segment Reporting Information [Line Items]
Premiums	0	0	0
Operating revenue - total	43,400	35,961	33,835
Benefit expense	0	0	0
Cost of products sold	40,077	32,978	31,588
Operating expense	905	811	272
Operating gain (loss)	2,418	2,172	1,975
CarelonRx | Operating Segments | Product revenue
Segment Reporting Information [Line Items]
Product and service revenue	24,470	22,630	19,452
CarelonRx | Operating Segments | Service fees
Segment Reporting Information [Line Items]
Product and service revenue	13	5	6
Carelon Services | Operating Segments
Segment Reporting Information [Line Items]
Premiums	6,315	2,630	1,679
Operating revenue - total	28,316	17,961	14,147
Benefit expense	24,283	14,388	10,610
Cost of products sold	0	0	0
Operating expense	3,073	2,856	2,857
Operating gain (loss)	960	717	680
Carelon Services | Operating Segments | Product revenue
Segment Reporting Information [Line Items]
Product and service revenue	0	0	0
Carelon Services | Operating Segments | Service fees
Segment Reporting Information [Line Items]
Product and service revenue	826	790	813
Corporate & Other | Operating Segments
Segment Reporting Information [Line Items]
Premiums	0	0	0
Operating revenue - total	463	309	479
Benefit expense	25	19	35
Cost of products sold	0	0	0
Operating expense	775	1,560	1,488
Operating gain (loss)	(337)	(1,270)	(1,044)
Corporate & Other | Operating Segments | Product revenue
Segment Reporting Information [Line Items]
Product and service revenue	0	0	0
Corporate & Other | Operating Segments | Service fees
Segment Reporting Information [Line Items]
Product and service revenue	0	6	28
Operating revenue - unaffiliated
Segment Reporting Information [Line Items]
Operating revenue - total	197,584	175,204	170,209
Operating revenue - unaffiliated | Eliminations
Segment Reporting Information [Line Items]
Operating revenue - total	(1,134)	(1,132)	(340)
Operating revenue - unaffiliated | Health Benefits | Operating Segments
Segment Reporting Information [Line Items]
Operating revenue - total	167,094	150,275	148,571
Operating revenue - unaffiliated | Total | Operating Segments
Segment Reporting Information [Line Items]
Operating revenue - total	31,624	26,055	21,950
Operating revenue - unaffiliated | CarelonRx | Operating Segments
Segment Reporting Information [Line Items]
Operating revenue - total	24,483	22,635	19,458
Operating revenue - unaffiliated | Carelon Services | Operating Segments
Segment Reporting Information [Line Items]
Operating revenue - total	7,141	3,420	2,492
Operating revenue - unaffiliated | Corporate & Other | Operating Segments
Segment Reporting Information [Line Items]
Operating revenue - total	0	6	28
Operating revenue - affiliated
Segment Reporting Information [Line Items]
Operating revenue - total	0	0	0
Operating revenue - affiliated | Eliminations
Segment Reporting Information [Line Items]
Operating revenue - total	(40,555)	(28,170)	(26,483)
Operating revenue - affiliated | Health Benefits | Operating Segments
Segment Reporting Information [Line Items]
Operating revenue - total	0	0	0
Operating revenue - affiliated | Total | Operating Segments
Segment Reporting Information [Line Items]
Operating revenue - total	40,092	27,867	26,032
Operating revenue - affiliated | CarelonRx | Operating Segments
Segment Reporting Information [Line Items]
Operating revenue - total	18,917	13,326	14,377
Operating revenue - affiliated | Carelon Services | Operating Segments
Segment Reporting Information [Line Items]
Operating revenue - total	21,175	14,541	11,655
Operating revenue - affiliated | Corporate & Other | Operating Segments
Segment Reporting Information [Line Items]
Operating revenue - total	$ 463	$ 303	$ 451