Business Acquisitions - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Business Combination [Line Items]
Goodwill	$ 28,344	$ 28,277	$ 25,317
Total net tangible assets (liabilities)	193	(236)
Gain on sale of business	0	201	0
Carelon Services
Business Combination [Line Items]
Goodwill	3,994	3,798	2,256
CarelonRx
Business Combination [Line Items]
Goodwill	1,898	1,915	957
Health Benefits
Business Combination [Line Items]
Goodwill	22,452	22,564	$ 22,104
Centers Plan for Healthy Living LLC
Business Combination [Line Items]
Finite-lived intangible assets	211
Indefinite-lived intangible assets	690
Goodwill	202
RSV QOZB LTSS, Inc
Business Combination [Line Items]
Finite-lived intangible assets	305
Goodwill	1,827
Business Combination, Series of Individually Immaterial Business Combinations
Business Combination [Line Items]
Finite-lived intangible assets	100	1,872
Indefinite-lived intangible assets		426
Goodwill	121	3,066
Total cash considerations	414	5,128
Total net tangible assets (liabilities)	193	(236)
Total intangible assets	$ 221	5,364
Business Combination, Series of Individually Immaterial Business Combinations | Carelon Services
Business Combination [Line Items]
Assets assumed		2,641
Business Combination, Series of Individually Immaterial Business Combinations | CarelonRx
Business Combination [Line Items]
Assets assumed		$ 1,594
Business Combination, Series of Individually Immaterial Business Combinations | Health Benefits
Business Combination [Line Items]
Percentage of intangible assets acquired	1
Assets assumed	$ 1,129