Legal Proceedings (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
Sep. 30, 2018	Dec. 31, 2021
Legal Reserve \| Maximum
Loss Contingencies [Line Items]
Range of possible loss		$ 300
Interchange Litigation
Loss Contingencies [Line Items]
Litigation settlement amount	$ 900	6,600
Payments for legal settlements	5,300	$ 700
Conditional return of legal settlements paid maximum amount	$ 700
Litigation settlement, trigger percent of opt out by class members for return of portion of settlement payments	15.00%	15.00%
Interchange Litigation \| Visa
Loss Contingencies [Line Items]
Litigation settlement amount	$ 600
Payments for legal settlements		$ 467
Conditional return of legal settlements paid maximum amount	$ 467

Conditional Return of Legal Settlements Paid Maximum Amount

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- Definition

Litigation Settlement, Trigger Percent of Opt Out by Class Members for Return of Portion of Settlement Payments

+ References

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- Definition

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

+ References

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The difference between the maximum amount of estimated loss and the amount recorded as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 05
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=99385795&loc=d3e12631-108344

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- Definition

The amount of cash paid for the settlement of litigation or for other legal issues during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585

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