XML 132 R108.htm IDEA: XBRL DOCUMENT v3.20.2
Legal Matters - Accrued Litigation (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Loss Contingency Accrual [Roll Forward]    
Balance at beginning of period $ 1,203 $ 1,434
Balance at end of period 914 1,203
Return of takedown payment to the litigation escrow account 467 0
Settled Litigation    
Loss Contingency Accrual [Roll Forward]    
Payments on unsettled and settled matters (792) (803)
Uncovered Litigation    
Loss Contingency Accrual [Roll Forward]    
Provision for unsettled legal matters 10 37
Covered Litigation    
Loss Contingency Accrual [Roll Forward]    
Provision for unsettled legal matters 26 535
U.S. Covered Litigation    
Loss Contingency Accrual [Roll Forward]    
Balance at beginning of period 1,198 1,428
Balance at end of period 888 1,198
U.S. Covered Litigation | Settled Litigation    
Loss Contingency Accrual [Roll Forward]    
Payments on unsettled and settled matters (777) (600)
VE Territory Covered Litigation    
Loss Contingency Accrual [Roll Forward]    
Balance at beginning of period 5 0
Provision for unsettled legal matters 26 165
Balance at end of period 21 5
VE Territory Covered Litigation | Settled Litigation    
Loss Contingency Accrual [Roll Forward]    
Payments on unsettled and settled matters (10) (160)
Interchange Multidistrict Litigation    
Loss Contingency Accrual [Roll Forward]    
Return of takedown payment to the litigation escrow account 467 0
Interchange Multidistrict Litigation | U.S. Covered Litigation    
Loss Contingency Accrual [Roll Forward]    
Provision for unsettled legal matters $ 0 $ 370