Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483076/450-20-50-1

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-Publisher FASB
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- Definition

Carrying amount of reserve for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs, which is expected to be paid within one year of the date of the statement of financial position.

+ References

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- Definition

Carrying amount of estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs, which is expected to be paid after one year or beyond the normal operating cycle, if longer.

+ References

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- Definition

Amount awarded to other party in judgment or settlement of litigation.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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-Topic 450
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-Publisher FASB
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- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
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-Section 50
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- Definition

Litigation Settlement, Percentage Of Litigating Subdivisions

+ References

No definition available.

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- Definition

Litigation Settlement, Period

+ References

No definition available.

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- Details

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- Details

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- Details

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- Details

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Commitments and contingencies (Details) $ in Millions				1 Months Ended			12 Months Ended
Commitments and contingencies (Details) $ in Millions	Nov. 02, 2022 USD ($)	Jun. 29, 2022 USD ($)	May 05, 2022 USD ($)	Aug. 31, 2022 USD ($)	Dec. 31, 2020 case	Dec. 31, 2017 case	Aug. 31, 2023 USD ($)	Jun. 08, 2023	Nov. 30, 2022 USD ($)
Loss Contingencies [Line Items]
Accrued litigation obligations				$ 551			$ 6,261
Washtenaw County Employees Retirement Systemn \| Pending Litigation
Loss Contingencies [Line Items]
Litigation settlement, amount awarded to other party		$ 105
Rite Aid Merger
Loss Contingencies [Line Items]
Number of cases \| case					2
Rite Aid Merger \| Pending Litigation
Loss Contingencies [Line Items]
Estimated litigation liability							193
Settlement Frameworks \| Pending Litigation
Loss Contingencies [Line Items]
Accrued litigation obligations	$ 754
Litigation settlement, period	6 years
Estimated litigation liability									$ 6,500
Settlement Frameworks \| Settled Litigation
Loss Contingencies [Line Items]
Accrued litigation obligations							6,300
Estimated litigation liability, current							703
Estimated litigation liability							7,000
Percentage of litigating subdivisions								99.50%
Settling States \| Pending Litigation
Loss Contingencies [Line Items]
Litigation settlement, period	15 years
Estimated litigation liability	$ 4,800
Settling States \| Settled Litigation
Loss Contingencies [Line Items]
Litigation settlement, period	15 years
Settling Tribes \| Pending Litigation
Loss Contingencies [Line Items]
Estimated litigation liability	$ 155
Consolidated Cases in State of Florida \| Settled Litigation
Loss Contingencies [Line Items]
Litigation settlement, amount awarded to other party			$ 683
Accrued litigation obligations			$ 620
Litigation settlement, period			18 years
Estimated litigation liability, current			$ 63
Estimated litigation liability				683
Ohio Combined Cases \| Pending Litigation
Loss Contingencies [Line Items]
Litigation settlement, amount awarded to other party				$ 651
Litigation settlement, period				15 years
Number of cases \| case						2
Humana \| Pending Litigation
Loss Contingencies [Line Items]
Estimated litigation liability							304
Humana \| Settled Litigation
Loss Contingencies [Line Items]
Litigation settlement, amount awarded to other party							$ 642