Commitments, Contingent Liabilities and Litigation Narrative (Details) $ in Millions			1 Months Ended	3 Months Ended
	Nov. 03, 2022 lawsuit numberOfUSTerritories plaintiff states	Jul. 31, 2021 lawsuit	Jul. 31, 2022 USD ($) plaintiff	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Oct. 31, 2022 USD ($) lawsuit states	Jun. 30, 2022 USD ($)
Loss Contingencies [Line Items]
Gain (Loss) Related to Litigation Settlement					$ (27)		$ (18)
Pharmaceutical
Loss Contingencies [Line Items]
Judgment for lost profits						$ 16
Subsequent Event
Loss Contingencies [Line Items]
Income from Settlements of Class Action Lawsuits				$ 66
Opioid Lawsuits [Member]
Loss Contingencies [Line Items]
Payments for Legal Settlements					372
Opioid Lawsuits [Member] | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Number of Eligible States | states								49
Product Liability Lawsuits [Member] | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number | lawsuit	7
New York Opioid Stewardship Act [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual					20
Aggregate Annual Assessment					$ 100
Estimated Liability for New York Opioid Stewardship Act							$ 41
Loss Contingency Accrual, Payments						$ 20
CVS Health
Loss Contingencies [Line Items]
Long-term Purchase Commitment, Period					10 years
Product Liability Lawsuits [Member] | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number | lawsuit	450
Minimum | Product Liability Lawsuits [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual					$ 527
Alameda County [Member] | Product Liability Lawsuits [Member] | Subsequent Event
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff	5,215
Other Jurisdictions [Member] | Product Liability Lawsuits [Member] | Subsequent Event
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff	8
WEST VIRGINIA | Opioid Lawsuits [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss			$ 124
OKLAHOMA | Opioid Lawsuits [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss									$ 95
WASHINGTON | Opioid Lawsuits [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss									$ 160
Native American tribes [Member] | Opioid Lawsuits [Member] | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss								$ 136
Total Opioid Litigation [Member]
Loss Contingencies [Line Items]
litigation settlement liability recorded					6,030
Loss Contingency, Estimate of Possible Loss					6,000
Total Opioid Litigation [Member] | Accrued Liabilities
Loss Contingencies [Line Items]
litigation settlement liability recorded					608
Total Opioid Litigation [Member] | Subsequent Event
Loss Contingencies [Line Items]
Settling States | states	46
Settling U.S Territories | numberOfUSTerritories	5
Private Parties [Member] | Opioid Lawsuits [Member] | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Lawsuits, Number | lawsuit								454
Private Parties [Member] | GEORGIA | Opioid Lawsuits [Member]
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff			21
Class Action Lawsuits [Member] | Private Parties [Member] | Opioid Lawsuits [Member] | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Lawsuits, Number | lawsuit								151
Product Liability Lawsuits [Member]
Loss Contingencies [Line Items]
Loss Contingency, Claims Settled, Number | lawsuit		1,300
Product Liability Lawsuits [Member] | Maximum
Loss Contingencies [Line Items]
Loss Contingency Accrual					$ 1,070