Commitments, Contingencies, Guarantees, and Others - Litigation (Details) $ in Millions	6 Months Ended
	Jun. 30, 2021 USD ($) claim
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss | $	$ 250
Cybersecurity Incident
Loss Contingencies [Line Items]
Number of consumer class action cases filed for Cybersecurity Incident	74
Number of consumer class action cases currently pending for cybersecurity incident	29
Penalty Paid to the US Treasury | $	$ 80
Pending litigation | Interchange litigation
Loss Contingencies [Line Items]
Litigation settlement, attributable to reporting entity and third party | $	$ 5,500
United States | Cybersecurity Incident
Loss Contingencies [Line Items]
Number of consumer class action cases filed for Cybersecurity Incident	61
Canada | Cybersecurity Incident
Loss Contingencies [Line Items]
Number of consumer class action cases filed for Cybersecurity Incident	13