Medical Claims Payable - Schedule of Causes of Increase Decrease in Liability for Unpaid Claims and Claims Adjustment Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Insurance [Abstract]
Assumed trend factors	$ (1,000)	$ (688)	$ (895)
Assumed completion factors	(290)	(1,043)	(676)
Total	$ (1,290)	$ (1,731)	$ (1,571)