Significant Accounting Policies - Narrative (Details) people in Millions, patient in Millions, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jan. 31, 2023 state	Jun. 30, 2022 USD ($) people state clinic store patient	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) people state clinic Segment store patient	Jun. 30, 2021 USD ($)
Significant Accounting Policies [Line Items]
Number of pharmacy plan members | people		110		110
Number of patients served per year | patient		1		1
Number of reportable segments | Segment				4
Expenses from transactions with related party | $		$ 16	$ 10	$ 31	$ 19
Other revenues from transactions with related party | $		$ 23	$ 19	$ 44	$ 37
Heartland Healthcare Services
Significant Accounting Policies [Line Items]
Number of states in which entity operates		4		4
Retail/ LTC
Significant Accounting Policies [Line Items]
Number of retail locations (more than) | store		9,000		9,000
Number of walk in medical clinics | clinic		1,100		1,100
Health Care Benefits
Significant Accounting Policies [Line Items]
Number of people served | people		35		35
Number of states in which the Company has entered the individual public health insurance exchange				8
Health Care Benefits | Forecast
Significant Accounting Policies [Line Items]
Additional number of states in which the Company has entered the individual public health insurance exchange	4