Net reduction to interest income.

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- Definition

Other real estate owned non-performing loan.

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- Definition

Percentage of carrying amount of our commercial nonperforming loans outstanding.

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No definition available.

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Percentage of loans held for sale and other nonperforming assets.

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No definition available.

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Percentage of nonperforming loans outstanding face value.

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No definition available.

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- Definition

Provision credit for loan and lease losses.

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No definition available.

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- Definition

Significant commitments to lend additional funds to borrowers with loans on nonperforming status.

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No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

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Amount of expense related to estimated loss from loan and lease transactions.

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Asset Quality - Additional Information (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018 USD ($) SecurityLoan	Sep. 30, 2017 USD ($) SecurityLoan	Sep. 30, 2018 USD ($) SecurityLoan	Sep. 30, 2017 USD ($) SecurityLoan	Dec. 31, 2017 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (credit) for losses on lending-related commitments	$ 2	$ 9	$ 3	$ 2
Percentage of carrying amount of our commercial nonperforming loans outstanding	80.00%		80.00%
Percentage of nonperforming loans outstanding face value	83.00%		83.00%
Percentage of loans held for sale and other nonperforming assets	83.00%		83.00%
Net reduction to interest income	$ 8	6	$ 22	18
Financial receivable, modifications, subsequent default, recorded investment	2	1	4	3
Commitments outstanding to lend additional funds to borrowers	4		4		$ 2
Provision (credit) for loan and lease losses	63	$ 47	189	$ 186
Other real estate owned nonperforming loan	$ 28		$ 28		31
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans \| SecurityLoan	0
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans \| SecurityLoan	82	45	178	100
Real Estate - Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivable, modifications, subsequent default, recorded investment			$ 130	$ 142
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income recognized on outstanding balances	$ 4	$ 3	9	9
Continuing Operations [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (credit) for loan and lease losses	60	42	184	178
Continuing Operations [Member] \| Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (credit) for loan and lease losses	(1)	1	1	4	3
Continuing Operations [Member] \| Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (credit) for loan and lease losses	44	11	126	108
Continuing Operations [Member] \| Consumer Portfolio Segment [Member] \| Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (credit) for loan and lease losses	16	31	58	70
Continuing Operations [Member] \| Consumer Portfolio Segment [Member] \| Real Estate - Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (credit) for loan and lease losses	(1)	$ (2)	3	$ (11)
Foreclosed Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other real estate owned nonperforming loan	$ 25		$ 25		$ 26