Commitments and Contingencies (Details) $ in Millions	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2022 USD ($)	Aug. 31, 2022 USD ($)	Jun. 30, 2023 USD ($) lease state	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) lease state	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2020 claim
Commitments and Contingencies Disclosure [Abstract]
Guarantor obligations, number of leases | lease			64		64
Loss Contingencies [Line Items]
Opioid litigation charge			$ 0	$ 0	$ 0	$ 484
Settlement Framework
Loss Contingencies [Line Items]
Legal settlement awarded to other party	$ 4,300
Attorneys' fees and costs	$ 625
Legal settlement, period of payment	10 years						10 years
Number of states that elected to join the settlement | state			45		45
Number of states under separate settlement agreements | state			4		4
Settlement Framework | Tribal Entities
Loss Contingencies [Line Items]
Legal settlement awarded to other party	$ 113
Attorneys' fees and costs	$ 16
Legal settlement, period of payment	10 years						10 years
Federal Court in Ohio Judgment | Pending Litigation
Loss Contingencies [Line Items]
Legal settlement awarded to other party		$ 651
Legal settlement, period of payment		15 years
Settlement Framework and Other Opioid-Related Claims
Loss Contingencies [Line Items]
Opioid litigation charge							$ 5,300
Radcliffe and Flaim v. Aetna Inc., et al | Pending Litigation
Loss Contingencies [Line Items]
Number of claims | claim								2