Goodwill and Other Intangibles - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Goodwill [Roll Forward]
Balance, beginning of the period			$ 91,272
Goodwill impairment	$ (5,725)	$ 0	(5,725)	$ 0
Divestiture			(69)
Balance, end of the period	85,478		85,478
Health Care Benefits
Goodwill [Roll Forward]
Balance, beginning of the period			46,644
Goodwill impairment			0
Divestiture			0
Balance, end of the period	46,644		46,644
Health Services
Goodwill [Roll Forward]
Balance, beginning of the period			34,066
Goodwill impairment			(5,725)
Divestiture			(69)
Balance, end of the period	28,272		28,272
Pharmacy & Consumer Wellness
Goodwill [Roll Forward]
Balance, beginning of the period			10,562
Goodwill impairment			0
Divestiture			0
Balance, end of the period	$ 10,562		$ 10,562