Commitments and Contingencies (Details) $ in Millions	1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended	34 Months Ended
	Dec. 31, 2022 USD ($)	Aug. 31, 2022 USD ($)	Sep. 30, 2024 USD ($) claim lease	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) lease	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2024 claim lease	Jun. 30, 2023 state
Commitments and Contingencies Disclosure [Abstract]
Guarantor obligations, number of leases | lease			61		61			61
Loss Contingencies [Line Items]
Opioid litigation charges			$ 0	$ 0	$ 100	$ 0
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
Number of states under separate settlement agreements | state									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
Settlement Framework and Other Opioid-Related Claims
Loss Contingencies [Line Items]
Opioid litigation charges							$ 5,300
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
Fiduciary Duty Breach, Opioid Matter
Loss Contingencies [Line Items]
Number of claims filed | claim								3
Nixon v. CVS Health Corporation, et al. And Tatone v. CVS Health Corporation, et al.
Loss Contingencies [Line Items]
Number of claims filed | claim			2
Kaufmann v. Lynch, et al., and Silva v. Lynch, et al.
Loss Contingencies [Line Items]
Number of claims filed | claim			2
Duffy v. Lynch, et al. and Lovoi v. Lynch, et al
Loss Contingencies [Line Items]
Number of claims filed | claim			2
Goff v. Lynch, et al. and Brodin v. Lynch, et al
Loss Contingencies [Line Items]
Number of claims filed | claim			2