This item represents the percentage of loans 30 plus days past due as compared to total retained loans.

No definition available.

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- Definition

Percentage of Loans Thirty Plus Days Past Due to Total Retained Loans, Financing Receivable, Converted to Term Loan

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Percentage of Loans Thirty Plus Days Past Due to Total Retained Loans, Financing Receivable, Revolving

+ References

No definition available.

+ Details

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- Definition

Percentage of Loans Thirty Plus Days Past Due to Total Retained Loans, Originated Five or More Years before Latest Fiscal Year

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Percentage of Loans Thirty Plus Days Past Due to Total Retained Loans, Originated Four Years before Latest Fiscal Year

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Percentage of Loans Thirty Plus Days Past Due to Total Retained Loans, Originated Three Years before Latest Fiscal Year

+ References

No definition available.

+ Details

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- Definition

Percentage of Loans Thirty Plus Days Past Due to Total Retained Loans, Originated Two Years before Latest Fiscal Year

+ References

No definition available.

+ Details

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- Definition

Percentage of Loans Thirty Plus Days Past Due to Total Retained Loans, Originated in Current Fiscal Year

+ References

No definition available.

+ Details

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- Definition

Percentage of Loans Thirty Plus Days Past Due to Total Retained Loans, Originated in Fiscal Year before Latest Fiscal Year

+ References

No definition available.

+ Details

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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.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount of financing receivable originated more than five years prior to current fiscal year.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of financing receivable originated four years prior to current fiscal year.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of financing receivable originated in current fiscal year.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount of financing receivable originated in fiscal year prior to current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 79
-URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448

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Period Type:	instant

- Definition

Amount of financing receivable originated three years prior to current fiscal year.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of financing receivable originated two years prior to current fiscal year.

+ References

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Amount of financing receivable that can be withdrawn, repaid and redrawn.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of revolving financing receivable converted to term loan.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, before allowance for credit loss, of financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 79
-URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448

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Balance Type:	debit
Period Type:	instant

- Details

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- Details

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Loans - Consumer, Excluding Credit Card Loan Portfolio, Auto and Other (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loans and Leases Receivable Disclosure [Line Items]
Total retained loans	$ 960,506	$ 945,601	$ 969,415
Consumer, excluding credit card
Loans and Leases Receivable Disclosure [Line Items]
Total retained loans	302,127	294,999	$ 335,776
Consumer, excluding credit card \| Auto and other
Loans and Leases Receivable Disclosure [Line Items]
Term loans originated in 2020	46,266
Term loans originated in 2019	12,936
Term loans originated in 2018	7,444
Term loans originated in 2017	4,575
Term loans originated in 2016	2,100
Term loans originated prior to 2016	766
Revolving loans within the revolving period	2,555
Revolving loans converted to term loans	183
Total retained loans	$ 76,825	$ 51,682
% of 30 plus days past due to total retained loans, Term loans originated in 2020	0.21%
% of 30 plus days past due to total retained loans, Term loans originated in 2019	0.83%
% of 30 plus days past due to total retained loans, Term loans originated in 2018	1.03%
% of 30 plus days past due to total retained loans, Term loans originated in 2017	1.18%
% of 30 plus days past due to total retained loans, Term loans originated in 2016	2.00%
% of 30 plus days past due to total retained loans, Term loans originated prior to 2016	3.13%
% of 30 plus days past due to total retained loans, Revolving loans within the revolving period	1.49%
% of 30 plus days past due to total retained loans, Revolving loans converted to term loans	13.66%
% of 30 plus days past due to total retained loans	0.60%	1.31%
Consumer, excluding credit card \| Auto and other \| Paycheck Protection Program (PPP)
Loans and Leases Receivable Disclosure [Line Items]
Total retained loans	$ 19,200
Current \| Consumer, excluding credit card \| Auto and other
Loans and Leases Receivable Disclosure [Line Items]
Term loans originated in 2020	46,169
Term loans originated in 2019	12,829
Term loans originated in 2018	7,367
Term loans originated in 2017	4,521
Term loans originated in 2016	2,058
Term loans originated prior to 2016	742
Revolving loans within the revolving period	2,517
Revolving loans converted to term loans	158
Total retained loans	76,361	$ 51,005
Current \| Consumer, excluding credit card \| Auto and other \| Paycheck Protection Program (PPP)
Loans and Leases Receivable Disclosure [Line Items]
Term loans originated in 2020	19,200
30–119 days past due \| Consumer, excluding credit card \| Auto and other
Loans and Leases Receivable Disclosure [Line Items]
Term loans originated in 2020	97
Term loans originated in 2019	107
Term loans originated in 2018	77
Term loans originated in 2017	53
Term loans originated in 2016	42
Term loans originated prior to 2016	23
Revolving loans within the revolving period	30
Revolving loans converted to term loans	17
Total retained loans	446	667
120 or more days past due \| Consumer, excluding credit card \| Auto and other
Loans and Leases Receivable Disclosure [Line Items]
Term loans originated in 2020	0
Term loans originated in 2019	0
Term loans originated in 2018	0
Term loans originated in 2017	1
Term loans originated in 2016	0
Term loans originated prior to 2016	1
Revolving loans within the revolving period	8
Revolving loans converted to term loans	8
Total retained loans	$ 18	$ 10