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Asset Quality - Aging Analysis of Past Due and Current Loans (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Total loans	$ 112,606	$ 119,394
Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	574	387
Current
Financing Receivable, Past Due [Line Items]
Total loans	111,703	118,767
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	156	122
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	66	58
90 and Greater Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	107	60
Total Past Due and Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	903	627
Total commercial loans
Financing Receivable, Past Due [Line Items]
Total loans	77,591	82,465
Accrued interest	383
Total commercial loans | Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	397	196
Total commercial loans | Commercial and Industrial
Financing Receivable, Past Due [Line Items]
Total loans	55,815	59,647
Accrued interest	522	417
Total commercial loans | Commercial and Industrial | Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	297	174
Total commercial loans | Commercial mortgage
Financing Receivable, Past Due [Line Items]
Total loans	15,187	16,352
Total commercial loans | Commercial mortgage | Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	100	21
Total commercial loans | Construction
Financing Receivable, Past Due [Line Items]
Total loans	3,066	2,530
Total commercial loans | Construction | Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Total commercial loans | Total commercial real estate loans
Financing Receivable, Past Due [Line Items]
Total loans	18,253	18,882
Total commercial loans | Total commercial real estate loans | Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	100	21
Total commercial loans | Commercial lease financing
Financing Receivable, Past Due [Line Items]
Total loans	3,523	3,936
Total commercial loans | Commercial lease financing | Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	0	1
Total commercial loans | Credit cards
Financing Receivable, Past Due [Line Items]
Total loans	207	172
Total commercial loans | Current
Financing Receivable, Past Due [Line Items]
Total loans	76,988	82,129
Total commercial loans | Current | Commercial and Industrial
Financing Receivable, Past Due [Line Items]
Total loans	55,354	59,366
Total commercial loans | Current | Commercial mortgage
Financing Receivable, Past Due [Line Items]
Total loans	15,049	16,305
Total commercial loans | Current | Construction
Financing Receivable, Past Due [Line Items]
Total loans	3,065	2,530
Total commercial loans | Current | Total commercial real estate loans
Financing Receivable, Past Due [Line Items]
Total loans	18,114	18,835
Total commercial loans | Current | Commercial lease financing
Financing Receivable, Past Due [Line Items]
Total loans	3,520	3,928
Total commercial loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	90	62
Total commercial loans | 30-59 Days Past Due | Commercial and Industrial
Financing Receivable, Past Due [Line Items]
Total loans	62	43
Total commercial loans | 30-59 Days Past Due | Commercial mortgage
Financing Receivable, Past Due [Line Items]
Total loans	25	16
Total commercial loans | 30-59 Days Past Due | Construction
Financing Receivable, Past Due [Line Items]
Total loans	1	0
Total commercial loans | 30-59 Days Past Due | Total commercial real estate loans
Financing Receivable, Past Due [Line Items]
Total loans	26	16
Total commercial loans | 30-59 Days Past Due | Commercial lease financing
Financing Receivable, Past Due [Line Items]
Total loans	2	3
Total commercial loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	34	36
Total commercial loans | 60-89 Days Past Due | Commercial and Industrial
Financing Receivable, Past Due [Line Items]
Total loans	30	33
Total commercial loans | 60-89 Days Past Due | Commercial mortgage
Financing Receivable, Past Due [Line Items]
Total loans	3	2
Total commercial loans | 60-89 Days Past Due | Construction
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Total commercial loans | 60-89 Days Past Due | Total commercial real estate loans
Financing Receivable, Past Due [Line Items]
Total loans	3	2
Total commercial loans | 60-89 Days Past Due | Commercial lease financing
Financing Receivable, Past Due [Line Items]
Total loans	1	1
Total commercial loans | 90 and Greater Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	82	42
Total commercial loans | 90 and Greater Days Past Due | Commercial and Industrial
Financing Receivable, Past Due [Line Items]
Total loans	72	31
Total commercial loans | 90 and Greater Days Past Due | Commercial mortgage
Financing Receivable, Past Due [Line Items]
Total loans	10	8
Total commercial loans | 90 and Greater Days Past Due | Construction
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Total commercial loans | 90 and Greater Days Past Due | Total commercial real estate loans
Financing Receivable, Past Due [Line Items]
Total loans	10	8
Total commercial loans | 90 and Greater Days Past Due | Commercial lease financing
Financing Receivable, Past Due [Line Items]
Total loans	0	3
Total commercial loans | Total Past Due and Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	603	336
Total commercial loans | Total Past Due and Non-performing Loans | Commercial and Industrial
Financing Receivable, Past Due [Line Items]
Total loans	461	281
Total commercial loans | Total Past Due and Non-performing Loans | Commercial mortgage
Financing Receivable, Past Due [Line Items]
Total loans	138	47
Total commercial loans | Total Past Due and Non-performing Loans | Construction
Financing Receivable, Past Due [Line Items]
Total loans	1	0
Total commercial loans | Total Past Due and Non-performing Loans | Total commercial real estate loans
Financing Receivable, Past Due [Line Items]
Total loans	139	47
Total commercial loans | Total Past Due and Non-performing Loans | Commercial lease financing
Financing Receivable, Past Due [Line Items]
Total loans	3	8
Total consumer loans
Financing Receivable, Past Due [Line Items]
Total loans	35,015	36,929
Accrued interest	139
Total consumer loans | Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	177	191
Total consumer loans | Real estate — residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans	20,958	21,401
Total consumer loans | Real estate — residential mortgage | Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	71	77
Total consumer loans | Home equity loans
Financing Receivable, Past Due [Line Items]
Total loans	7,139	7,951
Total consumer loans | Home equity loans | Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	97	107
Total consumer loans | Consumer direct loans
Financing Receivable, Past Due [Line Items]
Total loans	5,890	6,508
Total consumer loans | Consumer direct loans | Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	3	3
Total consumer loans | Credit cards
Financing Receivable, Past Due [Line Items]
Total loans	1,002	1,026
Total consumer loans | Credit cards | Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	5	3
Total consumer loans | Consumer indirect loans
Financing Receivable, Past Due [Line Items]
Total loans	26	43
Total consumer loans | Consumer indirect loans | Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	1	1
Total consumer loans | Current
Financing Receivable, Past Due [Line Items]
Total loans	34,715	36,638
Total consumer loans | Current | Real estate — residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans	20,863	21,307
Total consumer loans | Current | Home equity loans
Financing Receivable, Past Due [Line Items]
Total loans	7,001	7,804
Total consumer loans | Current | Consumer direct loans
Financing Receivable, Past Due [Line Items]
Total loans	5,853	6,478
Total consumer loans | Current | Credit cards
Financing Receivable, Past Due [Line Items]
Total loans	974	1,007
Total consumer loans | Current | Consumer indirect loans
Financing Receivable, Past Due [Line Items]
Total loans	24	42
Total consumer loans | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	66	60
Total consumer loans | 30-59 Days Past Due | Real estate — residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans	17	13
Total consumer loans | 30-59 Days Past Due | Home equity loans
Financing Receivable, Past Due [Line Items]
Total loans	27	27
Total consumer loans | 30-59 Days Past Due | Consumer direct loans
Financing Receivable, Past Due [Line Items]
Total loans	15	15
Total consumer loans | 30-59 Days Past Due | Credit cards
Financing Receivable, Past Due [Line Items]
Total loans	6	5
Total consumer loans | 30-59 Days Past Due | Consumer indirect loans
Financing Receivable, Past Due [Line Items]
Total loans	1	0
Total consumer loans | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	32	22
Total consumer loans | 60-89 Days Past Due | Real estate — residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans	7	3
Total consumer loans | 60-89 Days Past Due | Home equity loans
Financing Receivable, Past Due [Line Items]
Total loans	10	8
Total consumer loans | 60-89 Days Past Due | Consumer direct loans
Financing Receivable, Past Due [Line Items]
Total loans	10	7
Total consumer loans | 60-89 Days Past Due | Credit cards
Financing Receivable, Past Due [Line Items]
Total loans	5	4
Total consumer loans | 60-89 Days Past Due | Consumer indirect loans
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Total consumer loans | 90 and Greater Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	25	18
Total consumer loans | 90 and Greater Days Past Due | Real estate — residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans	0	1
Total consumer loans | 90 and Greater Days Past Due | Home equity loans
Financing Receivable, Past Due [Line Items]
Total loans	4	5
Total consumer loans | 90 and Greater Days Past Due | Consumer direct loans
Financing Receivable, Past Due [Line Items]
Total loans	9	5
Total consumer loans | 90 and Greater Days Past Due | Credit cards
Financing Receivable, Past Due [Line Items]
Total loans	12	7
Total consumer loans | 90 and Greater Days Past Due | Consumer indirect loans
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Total consumer loans | Total Past Due and Non-performing Loans
Financing Receivable, Past Due [Line Items]
Total loans	300	291
Total consumer loans | Total Past Due and Non-performing Loans | Real estate — residential mortgage
Financing Receivable, Past Due [Line Items]
Total loans	95	94
Total consumer loans | Total Past Due and Non-performing Loans | Home equity loans
Financing Receivable, Past Due [Line Items]
Total loans	138	147
Total consumer loans | Total Past Due and Non-performing Loans | Consumer direct loans
Financing Receivable, Past Due [Line Items]
Total loans	37	30
Total consumer loans | Total Past Due and Non-performing Loans | Credit cards
Financing Receivable, Past Due [Line Items]
Total loans	28	19
Total consumer loans | Total Past Due and Non-performing Loans | Consumer indirect loans
Financing Receivable, Past Due [Line Items]
Total loans	$ 2	$ 1

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- Definition

Amount, before allowance for credit loss, of accrued interest on financing receivable.

+ References

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- Definition

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