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.

No definition available.

+ Details

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- Definition

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554

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Loans and ACL - Types of Modifications and Impact to Allowance (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Newly Designated TDRs [Member] \| Commercial \| Commercial and industrial
Financing Receivable, Modifications [Line Items]
ALLL Impact	$ 0	$ 1	$ 0	$ 2
Newly Designated TDRs [Member] \| Commercial \| CRE
Financing Receivable, Modifications [Line Items]
ALLL Impact	0	1	0	1
Newly Designated TDRs [Member] \| Retail \| Residential mortgage
Financing Receivable, Modifications [Line Items]
ALLL Impact	4	10	9	16
Newly Designated TDRs [Member] \| Retail \| Direct
Financing Receivable, Modifications [Line Items]
ALLL Impact	0	0	0	0
Newly Designated TDRs [Member] \| Retail \| Indirect
Financing Receivable, Modifications [Line Items]
ALLL Impact	5	4	10	8
Newly Designated TDRs [Member] \| Revolving credit
Financing Receivable, Modifications [Line Items]
ALLL Impact	1	1	2	2
Newly Designated TDRs [Member] \| Rate \| Commercial \| Commercial and industrial
Financing Receivable, Modifications [Line Items]
TDRs	20	33	30	55
Newly Designated TDRs [Member] \| Rate \| Commercial \| CRE
Financing Receivable, Modifications [Line Items]
TDRs	8	8	27	14
Newly Designated TDRs [Member] \| Rate \| Retail \| Residential mortgage
Financing Receivable, Modifications [Line Items]
TDRs	58	82	140	210
Newly Designated TDRs [Member] \| Rate \| Retail \| Direct
Financing Receivable, Modifications [Line Items]
TDRs	2	2	4	5
Newly Designated TDRs [Member] \| Rate \| Retail \| Indirect
Financing Receivable, Modifications [Line Items]
TDRs	45	37	87	78
Newly Designated TDRs [Member] \| Rate \| Revolving credit
Financing Receivable, Modifications [Line Items]
TDRs	4	4	9	9
Newly Designated TDRs [Member] \| Structure \| Commercial \| Commercial and industrial
Financing Receivable, Modifications [Line Items]
TDRs	33	25	43	56
Newly Designated TDRs [Member] \| Structure \| Commercial \| CRE
Financing Receivable, Modifications [Line Items]
TDRs	1	3	2	5
Newly Designated TDRs [Member] \| Structure \| Retail \| Residential mortgage
Financing Receivable, Modifications [Line Items]
TDRs	5	6	15	12
Newly Designated TDRs [Member] \| Structure \| Retail \| Direct
Financing Receivable, Modifications [Line Items]
TDRs	1	1	1	2
Newly Designated TDRs [Member] \| Structure \| Retail \| Indirect
Financing Receivable, Modifications [Line Items]
TDRs	1	2	2	4
Newly Designated TDRs [Member] \| Structure \| Revolving credit
Financing Receivable, Modifications [Line Items]
TDRs	0	0	0	0
Re-Modification of Previously Designated TDRs [Member]
Financing Receivable, Modifications [Line Items]
ALLL Impact	0	0	0	0
Re-Modification of Previously Designated TDRs [Member] \| Rate
Financing Receivable, Modifications [Line Items]
TDRs	31	40	52	85
Re-Modification of Previously Designated TDRs [Member] \| Structure
Financing Receivable, Modifications [Line Items]
TDRs	$ 5	$ 13	$ 10	$ 22