Goodwill and Other Intangibles - Goodwill (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Balance, beginning of the period				$ 91,272	$ 91,272
Impairment	$ 0	$ 0	$ 0	(5,725)	0	$ 0
Divestiture				(69)
Balance, end of the period	85,478	91,272	91,272	85,478	91,272	91,272
Health Care Benefits
Goodwill [Roll Forward]
Balance, beginning of the period				46,644	46,644
Impairment				0
Divestiture				0
Balance, end of the period	46,644	46,644	46,644	46,644	46,644	46,644
Health Services
Goodwill [Roll Forward]
Balance, beginning of the period				34,066	34,066
Impairment				(5,725)
Divestiture				(69)
Balance, end of the period	28,272	34,066	34,066	28,272	34,066	34,066
Pharmacy & Consumer Wellness
Goodwill [Roll Forward]
Balance, beginning of the period				10,562	10,562
Impairment				0
Divestiture				0
Balance, end of the period	$ 10,562	$ 10,562	$ 10,562	$ 10,562	$ 10,562	$ 10,562