v3.21.2
Legal Matters - Additional Information (Detail)
$ in Millions
1 Months Ended 2 Months Ended 5 Months Ended 12 Months Ended 101 Months Ended 103 Months Ended
Nov. 12, 2021
financial_institution
May 29, 2020
state
Dec. 13, 2019
USD ($)
Sep. 17, 2018
USD ($)
Jun. 30, 2016
litigation_case
Dec. 31, 2020
financial_institution
Jun. 30, 2017
province
Oct. 31, 2011
financial_institution
atm_operator
Jun. 16, 2021
state
Jan. 31, 2021
bank
Mar. 31, 2017
merchant
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2012
USD ($)
Nov. 18, 2021
merchant
Nov. 18, 2021
case_filed
merchant
Sep. 30, 2019
USD ($)
Loss Contingencies [Line Items]                                  
Loss contingency accrual                       $ 983 $ 914       $ 1,203
Number of states | state   24             25                
Visa, MasterCard, and Certain U.S. Financial Institutions                                  
Loss Contingencies [Line Items]                                  
Loss contingency accrual       $ 5,300                          
Possible return to defendants     $ 700                            
U.S. Covered Litigation                                  
Loss Contingencies [Line Items]                                  
Period of accrual       5 years                          
Company's share of an additional settlement payment                       7 777        
Loss contingency accrual                       $ 881 $ 888       $ 1,198
Possible return to defendants     $ 467                            
U.S. Covered Litigation | Settled Litigation                                  
Loss Contingencies [Line Items]                                  
Company's share of an additional settlement payment       $ 600                          
Class Plaintiffs                                  
Loss Contingencies [Line Items]                                  
Payments for legal settlements                           $ 4,000      
Settlement, further distribution of default interchange                           $ 500      
Loss contingency, further distributions, default period                           8 months      
Loss contingency, number of cases appointed counsel | litigation_case         2                        
Interchange Multidistrict Litigation | Subsequent Event                                  
Loss Contingencies [Line Items]                                  
Settlement percentage                             40.00% 40.00%  
Interchange Multidistrict Litigation | U.S. Covered Litigation                                  
Loss Contingencies [Line Items]                                  
Provision for legal matters                           $ 1,100      
Interchange Multidistrict Litigation | U.S. Covered Litigation | Visa, MasterCard, and Certain U.S. Financial Institutions                                  
Loss Contingencies [Line Items]                                  
Provision for legal matters       $ 900                          
Interchange Opt Out Litigation | Subsequent Event                                  
Loss Contingencies [Line Items]                                  
Number of opt-out cases filed | case_filed                               50  
Europe Merchant Litigation                                  
Loss Contingencies [Line Items]                                  
Number of plaintiffs | merchant                     1            
Europe Merchant Litigation | Subsequent Event                                  
Loss Contingencies [Line Items]                                  
Number of plaintiffs | merchant                             750    
Number of claims settled | merchant                             150    
Number of claims pending | merchant                             550 550  
Europe Merchant Litigation | Threatened Litigation | Subsequent Event                                  
Loss Contingencies [Line Items]                                  
Number of plaintiffs | merchant                             30    
National ATM Council Class Action                                  
Loss Contingencies [Line Items]                                  
Number of non-bank ATM operators | atm_operator               13                  
Consumer Class Actions                                  
Loss Contingencies [Line Items]                                  
Number of claims pending | financial_institution               2                  
Number of financial institutions | financial_institution               3                  
Consumer Class Actions | Subsequent Event                                  
Loss Contingencies [Line Items]                                  
Number of financial institutions | financial_institution 3                                
German ATM Litigation                                  
Loss Contingencies [Line Items]                                  
Number of plaintiffs | bank                   6              
Canadian Competition Proceedings                                  
Loss Contingencies [Line Items]                                  
Number of financial institutions | financial_institution           10                      
Number of provinces with cases | province             5