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Revenue from Contracts with Customers - Summary of Sources of Noninterest Income that are Subject to Revenue Recognition Accounting Guidance (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Disaggregation Of Revenue [Line Items] |  |
Brokerage services income | $ 29 | $ 24
Other revenues from operations: |  |
Total other income | 580 | 587
Service Charges on Deposit Accounts [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue from contract with customer | 124 | 113
Trust Income [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue from contract with customer | 160 | 194
ASU 2014-09 [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Brokerage services income | 29 | 24
Other revenues from operations: |  |
Merchant discount and credit card interchange fees | 37 | 37
Other | 17 | 15
Total other income | 367 | 383
ASU 2014-09 [Member] | Service Charges on Deposit Accounts [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue from contract with customer | 124 | 113
ASU 2014-09 [Member] | Trust Income [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue from contract with customer | 160 | 194
ASU 2014-09 [Member] | Commercial Bank [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Brokerage services income | 2 | 2
Other revenues from operations: |  |
Merchant discount and credit card interchange fees | 17 | 17
Other | 8 | 6
Total other income | 68 | 59
ASU 2014-09 [Member] | Commercial Bank [Member] | Service Charges on Deposit Accounts [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue from contract with customer | 40 | 34
ASU 2014-09 [Member] | Commercial Bank [Member] | Trust Income [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue from contract with customer | 1 |
ASU 2014-09 [Member] | Retail Bank [Member] |  |
Other revenues from operations: |  |
Merchant discount and credit card interchange fees | 20 | 20
Other | 7 | 8
Total other income | 111 | 107
ASU 2014-09 [Member] | Retail Bank [Member] | Service Charges on Deposit Accounts [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue from contract with customer | 84 | 79
ASU 2014-09 [Member] | Institutional Services and Wealth Management [ Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Brokerage services income | 27 | 22
Other revenues from operations: |  |
Other | 2 | 1
Total other income | 188 | 217
ASU 2014-09 [Member] | Institutional Services and Wealth Management [ Member] | Trust Income [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue from contract with customer | $ 159 | $ 194

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- Definition Amount of commission revenue from buying and selling securities on behalf of customers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 05 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481996/940-20-05-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(a),(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 + Details
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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 924 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479941/924-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-42 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-40 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-4 + Details
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