Organization and Basis of Presentation (Details) security in Thousands, member in Thousands, $ in Millions		1 Months Ended	12 Months Ended
	Oct. 07, 2021 USD ($)	Sep. 30, 2021	Dec. 31, 2021 USD ($) member position	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Oct. 25, 2021 member	Aug. 31, 2021 security
Basis Of Presentation [Line Items]
Contract term		4 years
Premium revenue			$ 26,855	$ 18,299	$ 16,208
Purchase price			$ 176
Extension period		2 years
Health Plans \| New York
Basis Of Presentation [Line Items]
Number of members covered \| member						310
New York Acquisition—Medicaid
Basis Of Presentation [Line Items]
Purchase price	$ 106
New York Acquisition—Medicaid \| AgeWell New York \| New York
Basis Of Presentation [Line Items]
Number of members covered \| security							13
Premium revenue				700
Health Plans
Basis Of Presentation [Line Items]
Number of members eligible for the health care programs, approximately \| member			5,200
Number of states with programs \| position			18
Premium revenue			$ 26,855	18,299	16,208
Health Plans \| New York
Basis Of Presentation [Line Items]
Premium revenue			$ 1,429	$ 309	$ 179
Minimum \| Health Plans
Basis Of Presentation [Line Items]
Contract term			3 years
Maximum \| Health Plans
Basis Of Presentation [Line Items]
Contract term			5 years