Commitments, Contingent Liabilities and Litigation (Details) $ in Millions					3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2022 lawsuit StateAG plaintiff	Jan. 25, 2022 plaintiff lawsuit	Jul. 31, 2021 lawsuit	Jul. 31, 2014	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2021 USD ($)	Apr. 30, 2018 USD ($)
Loss Contingencies [Line Items]
Loss Related to Litigation Settlement					$ 34	$ 32	$ 52	$ 1,070
Pharmaceutical
Loss Contingencies [Line Items]
Judgment for lost profits					16
Product Liability Lawsuits | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, New Claims Filed, Number | lawsuit		443
Product Liability Lawsuits
Loss Contingencies [Line Items]
Loss Contingency, Claims Settled, Number | lawsuit			1,300
Product Liability Lawsuits | Minimum
Loss Contingencies [Line Items]
Loss Contingency Accrual					554		554
Product Liability Lawsuits | Maximum
Loss Contingencies [Line Items]
Loss Contingency Accrual					1,090		1,090
Total Opioid Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss					6,370		6,370
Estimated Litigation Liability					6,680		6,680
Estimated Litigation Liability, Current					480		480
Litigation Settlement, Expense								1,020
New York Opioid Stewardship Act [Member]
Loss Contingencies [Line Items]
Aggregate Annual Assessment										$ 100
Estimated Liability for New York Opioid Stewardship Act								$ 41
Loss Contingency Accrual, Payments					20
Loss Contingency Accrual					$ 20		$ 20
Opioid Lawsuits [Member] | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Lawsuits, Number | lawsuit	3,400
Number of State Attorneys General filing lawsuits | StateAG	25
Opioid Lawsuits [Member] | GEORGIA | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Number of Plaintiffs | plaintiff	21
Opioid Lawsuits [Member] | Private Parties [Member] | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Lawsuits, Number | lawsuit		464
Opioid Lawsuits [Member] | Class Action Lawsuits [Member] | Private Parties [Member] | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Lawsuits, Number | lawsuit		147
Opioid Lawsuits State [Member] | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Lawsuits, Number | lawsuit	2,900
Product Liability Lawsuits | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, New Claims Filed, Number | lawsuit		32
Product Liability Lawsuits | Alameda County [Member] | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Number of Plaintiffs | plaintiff		5,750
Product Liability Lawsuits | Other Jurisdictions [Member] | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Number of Plaintiffs | plaintiff		36
DOJ Investigation [Member]
Loss Contingencies [Line Items]
Loss Related to Litigation Settlement									$ 13
CVS Health
Loss Contingencies [Line Items]
Long-term Purchase Commitment, Period				10 years