Legal Matters (Tables)

9 Months Ended

Jun. 30, 2018

Loss Contingencies [Line Items]

Schedule of Loss Contingencies by Contingency

The following table summarizes the activity related to accrued litigation:

	Nine Months Ended June 30,
	2018			2017
	(in millions)
Balance at beginning of period	$	982		$	981
Provision for uncovered legal matters	—			17
Additional provision for legal matters	601			142
Payments on legal matters	(155		)	(145		)
Balance at end of period	$	1,428		$	995

U.S. Covered Litigation

Loss Contingencies [Line Items]

Schedule of Loss Contingencies by Contingency

The following table summarizes the activity related to U.S. covered litigation:

	Nine Months Ended June 30,
	2018			2017
	(in millions)
Balance at beginning of period	$	978		$	978
Additional provision for interchange multidistrict litigation	600			—
Payments on U.S. covered litigation	(150		)	—
Balance at end of period	$	1,428		$	978

VE Territory Covered Litigation

Loss Contingencies [Line Items]

Schedule of Loss Contingencies by Contingency

The following table summarizes the activity related to VE territory covered litigation:

	Nine Months Ended June 30,
	2018			2017
	(in millions)
Balance at beginning of period	$	1		$	2
Accrual for VE territory covered litigation	1			142
Payments on VE territory covered litigation	(2		)	(144		)
Balance at end of period	$	—		$	—