Financing Receivable, Collectively Evaluated for Impairment [Abstract]

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Financing Receivable, Collectively Evaluated For Impairment, Allowance As Percent Of Carrying Value

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Financing Receivable, Individually Evaluated for Impairment [Abstract]

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Financing Receivable, Individually Evaluated for Impairment, Allowance as a Percent of Carrying Value

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- Definition

Loans and leases receivable gross reported amount excluding loans measured at fair value.

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Allowance as percentage of outstanding loans and leases.

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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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-Publisher FASB
-Name Accounting Standards Codification
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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 of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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

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Allowance for Credit Losses - Allowance and Carrying Value by Portfolio Segment (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Impaired loans and troubled debt restructurings
Allowance for loan and lease losses	$ 568		$ 608
Carrying value	$ 9,761		$ 11,555
Allowance as a percentage of carrying value	5.82%		5.26%
Loans collectively evaluated for impairment
Allowance for loan and lease losses	$ 8,865		$ 8,993
Carrying value	$ 955,475		$ 930,991
Allowance as a percentage of carrying value	0.93%		0.97%
Total
Allowance for loan and lease losses	$ 9,433	$ 9,527	$ 9,601	$ 9,734	$ 10,050	$ 10,393
Carrying value	$ 965,236		$ 942,546
Allowance as a percentage of carrying value	0.98%		1.02%
Loans and leases	$ 972,910		$ 946,895
Estimate of Fair Value Measurement
Total
Loans and leases	7,674		4,349
Consumer real estate
Impaired loans and troubled debt restructurings
Allowance for loan and lease losses	145		258
Carrying value	$ 6,317		$ 8,556
Allowance as a percentage of carrying value	2.30%		3.02%
Loans collectively evaluated for impairment
Allowance for loan and lease losses	$ 446		$ 670
Carrying value	$ 262,729		$ 248,287
Allowance as a percentage of carrying value	0.17%		0.27%
Total
Allowance for loan and lease losses	$ 591	719	$ 928	1,158	1,366	1,720
Carrying value	$ 269,046		$ 256,843
Allowance as a percentage of carrying value	0.22%		0.36%
Consumer real estate \| Estimate of Fair Value Measurement
Total
Loans and leases	$ 640		$ 682
Credit card and other consumer
Impaired loans and troubled debt restructurings
Allowance for loan and lease losses	179		154
Carrying value	$ 657		$ 566
Allowance as a percentage of carrying value	27.25%		27.21%
Loans collectively evaluated for impairment
Allowance for loan and lease losses	$ 3,806		$ 3,720
Carrying value	$ 185,333		$ 189,140
Allowance as a percentage of carrying value	2.05%		1.97%
Total
Allowance for loan and lease losses	$ 3,985	3,970	$ 3,874	3,822	3,774	3,663
Carrying value	$ 185,990		$ 189,706
Allowance as a percentage of carrying value	2.14%		2.04%
Commercial
Impaired loans and troubled debt restructurings
Allowance for loan and lease losses	$ 244		$ 196
Carrying value	$ 2,787		$ 2,433
Allowance as a percentage of carrying value	8.75%		8.06%
Loans collectively evaluated for impairment
Allowance for loan and lease losses	$ 4,613		$ 4,603
Carrying value	$ 507,413		$ 493,564
Allowance as a percentage of carrying value	0.91%		0.93%
Total
Allowance for loan and lease losses	$ 4,857	$ 4,838	$ 4,799	$ 4,754	$ 4,910	$ 5,010
Carrying value	$ 510,200		$ 495,997
Allowance as a percentage of carrying value	0.95%		0.97%
Loans and leases	$ 517,234		$ 499,664
Commercial \| Estimate of Fair Value Measurement
Total
Loans and leases	$ 7,034		$ 3,667