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The amount of reserve for unfunded lending commitments.

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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BANK LOANS, NET, Allowance for Loan Losses, Loans Individually and Collectively Evaluated for Impairment (Details) - USD ($) $ in Millions	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018
Recorded investment
Total loans held for investment	$ 21,483		$ 20,979
Reserve for unfunded lending commitments [Abstract]
Reserve for unfunded lending commitments	11		9
C&I loans
Recorded investment
Total loans held for investment	7,731		8,098
CRE construction loans
Recorded investment
Total loans held for investment	219		185
CRE loans
Recorded investment
Total loans held for investment	3,695		3,652
Tax-exempt loans
Recorded investment
Total loans held for investment	1,290		1,241
SBL and other
Recorded investment
Total loans held for investment	3,631		3,349
Loans held for investment
Allowance for loan losses
Individually evaluated for impairment	2		7
Collectively evaluated for impairment	332		211
Total allowance for loan losses	334	$ 324	218	$ 215	$ 218	$ 203
Recorded investment
Individually evaluated for impairment	32		55
Collectively evaluated for impairment	21,451		20,924
Total loans held for investment	21,483		20,979
Loans held for investment \| C&I loans
Allowance for loan losses
Individually evaluated for impairment	1		6
Collectively evaluated for impairment	185		133
Total allowance for loan losses	186	197	139	134	140	123
Recorded investment
Individually evaluated for impairment	1		19
Collectively evaluated for impairment	7,730		8,079
Total loans held for investment	7,731		8,098
Loans held for investment \| CRE construction loans
Allowance for loan losses
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	4		3
Total allowance for loan losses	4	3	3	4	3	3
Recorded investment
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	219		185
Total loans held for investment	219		185
Loans held for investment \| CRE loans
Allowance for loan losses
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	106		46
Total allowance for loan losses	106	88	46	46	45	47
Recorded investment
Individually evaluated for impairment	6		8
Collectively evaluated for impairment	3,689		3,644
Total loans held for investment	3,695		3,652
Loans held for investment \| Tax-exempt loans
Allowance for loan losses
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	13		9
Total allowance for loan losses	13	11	9	9	8	9
Recorded investment
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	1,290		1,241
Total loans held for investment	1,290		1,241
Loans held for investment \| Residential mortgage loans
Allowance for loan losses
Individually evaluated for impairment	1		1
Collectively evaluated for impairment	19		15
Total allowance for loan losses	20	18	16	16	17	17
Recorded investment
Individually evaluated for impairment	25		28
Collectively evaluated for impairment	4,892		4,426
Total loans held for investment	4,917		4,454
Loans held for investment \| SBL and other
Allowance for loan losses
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	5		5
Total allowance for loan losses	5	$ 7	5	$ 6	$ 5	$ 4
Recorded investment
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	3,631		3,349
Total loans held for investment	$ 3,631		$ 3,349