Business Acquisitions and Divestitures - Intangible Assets Acquired (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Business Combination [Line Items]
Total intangible assets	$ 100	$ 2,298
State Medicaid licenses
Business Combination [Line Items]
Indefinite-lived intangible assets acquired	0	426
Customer-related
Business Combination [Line Items]
Fair Value	$ 100	$ 1,621
Weighted Average Useful Life	15 years	20 years
Provider and hospital relationships
Business Combination [Line Items]
Fair Value	$ 0	$ 70
Weighted Average Useful Life	10 years	10 years
Other
Business Combination [Line Items]
Fair Value	$ 0	$ 181
Weighted Average Useful Life	8 years	8 years