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LOANS AND LEASES - Age Analysis of Past Due Loans (Detail) - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total Loans | $ 22,543 | $ 22,153
Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 8,832 | 8,786
Commercial and Industrial [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 5,028 | 4,556
Commercial Leases [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 385 | 373
Other [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 37 | 46
Total Commercial Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 14,282 | 13,761
Direct Installment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,758 | 1,764
Residential Mortgages [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 3,022 | 3,113
Indirect Installment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,968 | 1,933
Consumer Lines of Credit [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,513 | 1,582
Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 8,261 | 8,392
Originated Loans and Leases [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 126 | 116
Non- Accrual | 68 | 58
Current | 18,924 | 17,946
Total Loans | 19,050 | 18,062
Originated Loans and Leases [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 54 | 53
Originated Loans and Leases [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 4 | 5
Originated Loans and Leases [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 34 | 24
Non- Accrual | 27 | 17
Current | 6,567 | 6,147
Total Loans | 6,601 | 6,171
Originated Loans and Leases [Member] | Commercial Real Estate [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 7 | 7
Originated Loans and Leases [Member] | Commercial Real Estate [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 0 | 0
Originated Loans and Leases [Member] | Commercial and Industrial [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 24 | 24
Non- Accrual | 17 | 19
Current | 4,684 | 4,116
Total Loans | 4,708 | 4,140
Originated Loans and Leases [Member] | Commercial and Industrial [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 7 | 5
Originated Loans and Leases [Member] | Commercial and Industrial [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 0 | 0
Originated Loans and Leases [Member] | Commercial Leases [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 6 | 3
Non- Accrual | 2 | 2
Current | 379 | 370
Total Loans | 385 | 373
Originated Loans and Leases [Member] | Commercial Leases [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 4 | 1
Originated Loans and Leases [Member] | Commercial Leases [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 0 | 0
Originated Loans and Leases [Member] | Other [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 1 | 1
Non- Accrual | 1 | 1
Current | 36 | 45
Total Loans | 37 | 46
Originated Loans and Leases [Member] | Other [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 0 | 0
Originated Loans and Leases [Member] | Other [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 0 | 0
Originated Loans and Leases [Member] | Total Commercial Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 65 | 52
Non- Accrual | 47 | 39
Current | 11,666 | 10,678
Total Loans | 11,731 | 10,730
Originated Loans and Leases [Member] | Total Commercial Loans [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 18 | 13
Originated Loans and Leases [Member] | Total Commercial Loans [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 0 | 0
Originated Loans and Leases [Member] | Direct Installment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 14 | 16
Non- Accrual | 7 | 8
Current | 1,665 | 1,652
Total Loans | 1,679 | 1,668
Originated Loans and Leases [Member] | Direct Installment [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 6 | 8
Originated Loans and Leases [Member] | Direct Installment [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 1 | 0
Originated Loans and Leases [Member] | Residential Mortgages [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 26 | 25
Non- Accrual | 8 | 6
Current | 2,547 | 2,587
Total Loans | 2,573 | 2,612
Originated Loans and Leases [Member] | Residential Mortgages [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 16 | 16
Originated Loans and Leases [Member] | Residential Mortgages [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 2 | 3
Originated Loans and Leases [Member] | Indirect Installment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 12 | 14
Non- Accrual | 2 | 2
Current | 1,956 | 1,919
Total Loans | 1,968 | 1,933
Originated Loans and Leases [Member] | Indirect Installment [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 10 | 11
Originated Loans and Leases [Member] | Indirect Installment [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 0 | 1
Originated Loans and Leases [Member] | Consumer Lines of Credit [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 9 | 9
Non- Accrual | 4 | 3
Current | 1,090 | 1,110
Total Loans | 1,099 | 1,119
Originated Loans and Leases [Member] | Consumer Lines of Credit [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 4 | 5
Originated Loans and Leases [Member] | Consumer Lines of Credit [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 1 | 1
Originated Loans and Leases [Member] | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 61 | 64
Non- Accrual | 21 | 19
Current | 7,258 | 7,268
Total Loans | 7,319 | 7,332
Originated Loans and Leases [Member] | Consumer Loan [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 36 | 40
Originated Loans and Leases [Member] | Consumer Loan [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 4 | 5
Acquired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 88 | 120
Non- Accrual | 5 | 21
Current | 3,607 | 4,193
(Discount) Premium | (202) | (222)
Total Loans | 3,493 | 4,091
Acquired Loans [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 40 | 46
Acquired Loans [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 43 | 53
Acquired Loans [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 53 | 60
Non- Accrual | 3 | 3
Current | 2,332 | 2,723
(Discount) Premium | (154) | (168)
Total Loans | 2,231 | 2,615
Acquired Loans [Member] | Commercial Real Estate [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 19 | 19
Acquired Loans [Member] | Commercial Real Estate [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 31 | 38
Acquired Loans [Member] | Commercial and Industrial [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 7 | 24
Non- Accrual | 2 | 17
Current | 336 | 420
(Discount) Premium | (23) | (28)
Total Loans | 320 | 416
Acquired Loans [Member] | Commercial and Industrial [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 1 | 3
Acquired Loans [Member] | Commercial and Industrial [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 4 | 4
Acquired Loans [Member] | Total Commercial Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 60 | 84
Non- Accrual | 5 | 20
Current | 2,668 | 3,143
(Discount) Premium | (177) | (196)
Total Loans | 2,551 | 3,031
Acquired Loans [Member] | Total Commercial Loans [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 20 | 22
Acquired Loans [Member] | Total Commercial Loans [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 35 | 42
Acquired Loans [Member] | Direct Installment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 2 | 5
Non- Accrual | 0 | 0
Current | 77 | 91
(Discount) Premium | 0 | 0
Total Loans | 79 | 96
Acquired Loans [Member] | Direct Installment [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 1 | 3
Acquired Loans [Member] | Direct Installment [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 1 | 2
Acquired Loans [Member] | Residential Mortgages [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 16 | 19
Non- Accrual | 0 | 0
Current | 449 | 498
(Discount) Premium | (16) | (16)
Total Loans | 449 | 501
Acquired Loans [Member] | Residential Mortgages [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 12 | 13
Acquired Loans [Member] | Residential Mortgages [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 4 | 6
Acquired Loans [Member] | Consumer Lines of Credit [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 10 | 12
Non- Accrual | 0 | 1
Current | 413 | 461
(Discount) Premium | (9) | (10)
Total Loans | 414 | 463
Acquired Loans [Member] | Consumer Lines of Credit [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 7 | 8
Acquired Loans [Member] | Consumer Lines of Credit [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 3 | 3
Acquired Loans [Member] | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 28 | 36
Non- Accrual | 0 | 1
Current | 939 | 1,050
(Discount) Premium | (25) | (26)
Total Loans | 942 | 1,060
Acquired Loans [Member] | Consumer Loan [Member] | 30-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | 20 | 24
Acquired Loans [Member] | Consumer Loan [Member] | Equal to Greater than 90 Days Past Due and Still Accruing [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due | $ 8 | $ 11

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