$CMA
COMERICA INC /NEW/ Stock $cma

$cma Overview Financials Valuation SEC Filings Company Website

2024 Q4 Form 10-Q Financial Statement

#000002841224000349 Filed on October 28, 2024

Income Statement

Concept	2024 Q4	2024 Q3
Revenue		$191.0M
YoY Change		-4.98%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization		$23.00M
YoY Change		4.55%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income		$235.0M
YoY Change		-28.13%
Income Tax		$51.00M
% Of Pretax Income		21.7%
Net Earnings		$177.0M
YoY Change		-29.48%
Net Earnings / Revenue		92.67%
Basic Earnings Per Share		$1.34
Diluted Earnings Per Share		$1.33
COMMON SHARES
Basic Shares Outstanding	131.5M shares	132.7M shares
Diluted Shares Outstanding		134.0M shares

Balance Sheet

Concept	2024 Q4	2024 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents		$6.393B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment		$476.0M
YoY Change		16.1%
Goodwill		$635.0M
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets		$79.66B
YoY Change		-7.05%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses		$2.434B
YoY Change		-10.35%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities		$2.434B
YoY Change		-67.66%
LONG-TERM LIABILITIES
Long-Term Debt		$6.786B
YoY Change		215.92%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities		$6.786B
YoY Change		215.92%
TOTAL LIABILITIES
Total Short-Term Liabilities		$2.434B
Total Long-Term Liabilities		$6.786B
Total Liabilities		$72.30B
YoY Change		-10.45%
SHAREHOLDERS EQUITY
Retained Earnings		$11.95B
YoY Change		1.3%
Common Stock		$3.358B
YoY Change		-0.09%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity		$7.366B
YoY Change
Total Liabilities & Shareholders Equity		$79.66B
YoY Change		-7.05%

Cashflow Statement

Concept	2024 Q4	2024 Q3
OPERATING ACTIVITIES
Net Income		$177.0M
YoY Change		-29.48%
Depreciation, Depletion And Amortization		$23.00M
YoY Change		4.55%
Cash From Operating Activities		$1.049B
YoY Change		-689.33%
INVESTING ACTIVITIES
Capital Expenditures		$34.00M
YoY Change		-12.82%
Acquisitions
YoY Change
Other Investing Activities		$1.871B
YoY Change		-36.85%
Cash From Investing Activities		$1.837B
YoY Change		-37.18%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities		-1.305B
YoY Change		-73.13%
NET CHANGE
Cash From Operating Activities		1.049B
Cash From Investing Activities		1.837B
Cash From Financing Activities		-1.305B
Net Change In Cash		1.581B
YoY Change		-174.89%
FREE CASH FLOW
Cash From Operating Activities		$1.049B
Capital Expenditures		$34.00M
Free Cash Flow		$1.015B
YoY Change		-567.74%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2024
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2024-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity Registrant Name EntityRegistrantName	Comerica Incorporated
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	38-1998421
	dei	Entity Address Address Line1 EntityAddressAddressLine1	1717 Main Street, MC 6404
	dei	Entity Address City Or Town EntityAddressCityOrTown	Dallas
	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	75201
	dei	City Area Code CityAreaCode	(833)
	dei	Local Phone Number LocalPhoneNumber	571-0486
	dei	Trading Symbol TradingSymbol	CMA
	dei	Security Exchange Name SecurityExchangeName	NYSE
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2024Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	131514178	shares
CY2024Q3	us-gaap	Cash And Due From Banks CashAndDueFromBanks	870000000	usd
CY2023Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	1443000000	usd
CY2024Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	5523000000	usd
CY2023Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	8059000000	usd
CY2024Q3	us-gaap	Other Short Term Investments OtherShortTermInvestments	364000000	usd
CY2023Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	399000000	usd
CY2024Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	49831000000	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	51425000000	usd
CY2024Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	476000000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	445000000	usd
CY2024Q3	us-gaap	Other Assets OtherAssets	6713000000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	7194000000	usd
CY2024Q3	us-gaap	Assets Assets	79663000000	usd
CY2023Q4	us-gaap	Assets Assets	85834000000	usd
CY2024Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	23819000000	usd
CY2023Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	27849000000	usd
CY2024Q3	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	31469000000	usd
CY2023Q4	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	28246000000	usd
CY2024Q3	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	2155000000	usd
CY2023Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	2381000000	usd
CY2024Q3	cma	Deposits Customer Certificates Deposits DepositsCustomerCertificatesDeposits	3592000000	usd
CY2023Q4	cma	Deposits Customer Certificates Deposits DepositsCustomerCertificatesDeposits	3723000000	usd
CY2024Q3	cma	Other Time Deposits OtherTimeDeposits	2017000000	usd
CY2023Q4	cma	Other Time Deposits OtherTimeDeposits	4550000000	usd
CY2024Q3	us-gaap	Interest Bearing Foreign Deposit Time Deposits InterestBearingForeignDepositTimeDeposits	25000000	usd
CY2023Q4	cma	Short Term Advances ShortTermAdvances	3565000000	usd
CY2024Q3	us-gaap	Other Liabilities OtherLiabilities	2434000000	usd
CY2023Q4	us-gaap	Other Liabilities OtherLiabilities	2895000000	usd
CY2024Q3	us-gaap	Long Term Debt LongTermDebt	6786000000	usd
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	6206000000	usd
CY2024Q3	us-gaap	Liabilities Liabilities	72297000000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	79428000000	usd
CY2024Q3	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2023Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2023Q4	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	100000
CY2024Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2355000000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-3048000000	usd
CY2024Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	11949000000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	11727000000	usd
CY2023Q3	cma	Interest And Dividend Income Securities Afs And Htm InterestAndDividendIncomeSecuritiesAFSAndHTM	105000000	usd
	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	309000000	usd
CY2024Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	982000000	usd
CY2023Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	1103000000	usd
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2972000000	usd
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	3126000000	usd
CY2024Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	330000000	usd
CY2023Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	271000000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	952000000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	590000000	usd
CY2024Q3	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	1000000	usd
CY2023Q3	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	125000000	usd
	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	47000000	usd
	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	333000000	usd
CY2024Q3	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	117000000	usd
CY2023Q3	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	106000000	usd
	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	358000000	usd
	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	273000000	usd
CY2024Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	534000000	usd
CY2023Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	601000000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1615000000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1930000000	usd
CY2024Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	14000000	usd
CY2023Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	14000000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	28000000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	77000000	usd
CY2024Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	520000000	usd
CY2023Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	587000000	usd
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	1587000000	usd
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	1853000000	usd
CY2024Q3	cma	Card Fees CardFees	64000000	usd
CY2023Q3	cma	Card Fees CardFees	71000000	usd
	cma	Card Fees CardFees	212000000	usd
CY2024Q3	cma	Fiduciaryincome Fiduciaryincome	57000000	usd
CY2023Q3	cma	Commercial Lending Fees CommercialLendingFees	19000000	usd
	cma	Commercial Lending Fees CommercialLendingFees	50000000	usd
	cma	Commercial Lending Fees CommercialLendingFees	55000000	usd
	dei	Entity Central Index Key EntityCentralIndexKey	0000028412
	dei	Security12b Title Security12bTitle	Common Stock, $5 par value
CY2024Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	15886000000	usd
CY2024Q3	cma	Loans Receivable Commercial Financial And Agricultural Net Of Deferred Income LoansReceivableCommercialFinancialAndAgriculturalNetOfDeferredIncome	25953000000	usd
CY2023Q4	cma	Loans Receivable Commercial Financial And Agricultural Net Of Deferred Income LoansReceivableCommercialFinancialAndAgriculturalNetOfDeferredIncome	27251000000	usd
CY2024Q3	cma	Real Estate Construction Loans Net Of Deferred Income RealEstateConstructionLoansNetOfDeferredIncome	3859000000	usd
CY2023Q4	cma	Real Estate Construction Loans Net Of Deferred Income RealEstateConstructionLoansNetOfDeferredIncome	5083000000	usd
CY2024Q3	cma	Loans Receivable Commercial Mortgage Net Of Deferred Income LoansReceivableCommercialMortgageNetOfDeferredIncome	14774000000	usd
CY2023Q4	cma	Loans Receivable Commercial Mortgage Net Of Deferred Income LoansReceivableCommercialMortgageNetOfDeferredIncome	13686000000	usd
CY2024Q3	cma	Leases Receivable Commercial Lease Financing Net Of Deferred Income LeasesReceivableCommercialLeaseFinancingNetOfDeferredIncome	767000000	usd
CY2023Q4	cma	Leases Receivable Commercial Lease Financing Net Of Deferred Income LeasesReceivableCommercialLeaseFinancingNetOfDeferredIncome	807000000	usd
CY2024Q3	cma	Loans And Leases Receivable Foreign Net Of Deferred Income Other LoansAndLeasesReceivableForeignNetOfDeferredIncomeOther	1003000000	usd
CY2024Q3	cma	Loans And Leases Receivable Consumer Mortgage Net Of Deferred Income LoansAndLeasesReceivableConsumerMortgageNetOfDeferredIncome	1901000000	usd
CY2023Q4	cma	Loans And Leases Receivable Consumer Mortgage Net Of Deferred Income LoansAndLeasesReceivableConsumerMortgageNetOfDeferredIncome	1889000000	usd
CY2024Q3	cma	Loans And Leases Receivable Consumer Loans Net Of Deferred Income LoansAndLeasesReceivableConsumerLoansNetOfDeferredIncome	2260000000	usd
CY2023Q4	cma	Loans And Leases Receivable Consumer Loans Net Of Deferred Income LoansAndLeasesReceivableConsumerLoansNetOfDeferredIncome	2295000000	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	52113000000	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	688000000	usd
CY2023Q4	us-gaap	Interest Bearing Foreign Deposit Time Deposits InterestBearingForeignDepositTimeDeposits	13000000	usd
CY2024Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	39258000000	usd
CY2024Q3	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	100000
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	4000	shares
CY2024Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	4000	shares
CY2024Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	4000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	4000	shares
CY2024Q3	us-gaap	Preferred Stock Value PreferredStockValue	394000000	usd
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	394000000	usd
CY2024Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	5
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	5
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	325000000	shares
CY2024Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	325000000	shares
CY2024Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	228164824	shares
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	228164824	shares
CY2024Q3	us-gaap	Common Stock Value CommonStockValue	1141000000	usd
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	1141000000	usd
CY2024Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2217000000	usd
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2224000000	usd
CY2024Q3	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	95441515	shares
CY2023Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	96266568	shares
CY2024Q3	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	5980000000	usd
CY2023Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	6032000000	usd
	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	2409000000	usd
	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	2491000000	usd
CY2024Q3	cma	Interest And Dividend Income Securities Afs And Htm InterestAndDividendIncomeSecuritiesAFSAndHTM	99000000	usd
	cma	Interest And Dividend Income Securities Afs And Htm InterestAndDividendIncomeSecuritiesAFSAndHTM	302000000	usd
	cma	Interest And Dividend Income Securities Afs And Htm InterestAndDividendIncomeSecuritiesAFSAndHTM	326000000	usd
CY2024Q3	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	85000000	usd
CY2023Q3	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	136000000	usd
	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	261000000	usd
	cma	Card Fees CardFees	194000000	usd
CY2023Q3	cma	Fiduciaryincome Fiduciaryincome	59000000	usd
	cma	Fiduciaryincome Fiduciaryincome	166000000	usd
	cma	Fiduciaryincome Fiduciaryincome	179000000	usd
CY2024Q3	cma	Servicechargesondepositaccounts Servicechargesondepositaccounts	46000000	usd
CY2023Q3	cma	Servicechargesondepositaccounts Servicechargesondepositaccounts	47000000	usd
	cma	Servicechargesondepositaccounts Servicechargesondepositaccounts	137000000	usd
	cma	Servicechargesondepositaccounts Servicechargesondepositaccounts	140000000	usd
CY2023Q3	cma	Capital Markets Income CapitalMarketsIncome	35000000	usd
	cma	Capital Markets Income CapitalMarketsIncome	106000000	usd
	cma	Capital Markets Income CapitalMarketsIncome	113000000	usd
CY2024Q3	cma	Commercial Lending Fees CommercialLendingFees	17000000	usd
CY2024Q3	us-gaap	Equipment Expense EquipmentExpense	13000000	usd
CY2023Q3	us-gaap	Equipment Expense EquipmentExpense	12000000	usd
	us-gaap	Equipment Expense EquipmentExpense	38000000	usd
	us-gaap	Equipment Expense EquipmentExpense	36000000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9502000000	usd
	us-gaap	Advertising Expense AdvertisingExpense	30000000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	106000000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	120000000	usd
CY2023Q3	us-gaap	Noninterest Expense NoninterestExpense	555000000	usd
	us-gaap	Noninterest Expense NoninterestExpense	1720000000	usd
	us-gaap	Noninterest Expense NoninterestExpense	1641000000	usd
CY2024Q3	cma	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	235000000	usd
CY2023Q3	cma	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	327000000	usd
	cma	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	671000000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	51000000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	76000000	usd
CY2024Q3	us-gaap	Profit Loss ProfitLoss	184000000	usd
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-36000000	usd
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-20000000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	45000000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	44000000	usd
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-15000000	usd
CY2023Q4	cma	Loans And Leases Receivable Foreign Net Of Deferred Income Other LoansAndLeasesReceivableForeignNetOfDeferredIncomeOther	1102000000	usd
CY2024Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	50517000000	usd
CY2024Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	686000000	usd
CY2023Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	38913000000	usd
CY2024Q3	us-gaap	Deposits Deposits	63077000000	usd
CY2023Q4	us-gaap	Deposits Deposits	66762000000	usd
CY2024Q3	cma	Short Term Advances ShortTermAdvances	0	usd
CY2024Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7366000000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6406000000	usd
CY2024Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	79663000000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	85834000000	usd
CY2023Q3	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	862000000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	16869000000	usd
CY2024Q3	cma	Capital Markets Income CapitalMarketsIncome	39000000	usd
CY2023Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	19000000	usd
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	52000000	usd
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	60000000	usd
CY2023Q3	us-gaap	Noninterest Income NoninterestIncome	295000000	usd
	us-gaap	Noninterest Income NoninterestIncome	804000000	usd
	us-gaap	Noninterest Income NoninterestIncome	880000000	usd
CY2024Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	335000000	usd
CY2023Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	315000000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	1006000000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	947000000	usd
CY2024Q3	cma	Outside Processing Fee Expense OutsideProcessingFeeExpense	69000000	usd
CY2023Q3	cma	Outside Processing Fee Expense OutsideProcessingFeeExpense	75000000	usd
	cma	Outside Processing Fee Expense OutsideProcessingFeeExpense	205000000	usd
	cma	Outside Processing Fee Expense OutsideProcessingFeeExpense	207000000	usd
CY2024Q3	cma	Software Expenses SoftwareExpenses	46000000	usd
CY2023Q3	cma	Software Expenses SoftwareExpenses	44000000	usd
	cma	Software Expenses SoftwareExpenses	135000000	usd
	cma	Software Expenses SoftwareExpenses	127000000	usd
CY2024Q3	us-gaap	Occupancy Net OccupancyNet	46000000	usd
CY2023Q3	us-gaap	Occupancy Net OccupancyNet	44000000	usd
	us-gaap	Occupancy Net OccupancyNet	134000000	usd
	us-gaap	Occupancy Net OccupancyNet	126000000	usd
CY2024Q3	us-gaap	Advertising Expense AdvertisingExpense	10000000	usd
CY2023Q3	us-gaap	Advertising Expense AdvertisingExpense	12000000	usd
	us-gaap	Advertising Expense AdvertisingExpense	30000000	usd
CY2024Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	32000000	usd
CY2023Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	34000000	usd
CY2024Q3	us-gaap	Noninterest Expense NoninterestExpense	562000000	usd
	cma	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	1092000000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	143000000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	244000000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	251000000	usd
	us-gaap	Profit Loss ProfitLoss	528000000	usd
	us-gaap	Profit Loss ProfitLoss	848000000	usd
CY2024Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	1000000	usd
CY2023Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	1000000	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	3000000	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	4000000	usd
CY2024Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	6000000	usd
CY2023Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	6000000	usd
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	17000000	usd
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	177000000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	244000000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	508000000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	827000000	usd
CY2024Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.34
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.85
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.83
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.27
CY2024Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.33
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.84
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.80
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.24
CY2023Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-533000000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1221000000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	50000000	usd
CY2024Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	94000000	usd
CY2023Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	94000000	usd
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	283000000	usd
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	282000000	usd
CY2024Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.71
CY2023Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.71
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.13
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.13
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5595000000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	251000000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-784000000	usd
CY2023Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.71
CY2023Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	94000000	usd
CY2023Q3	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	6000000	usd
CY2023Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1000000	usd
CY2023Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9000000	usd
CY2023Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4972000000	usd
CY2024Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6161000000	usd
CY2024Q3	us-gaap	Profit Loss ProfitLoss	184000000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1108000000	usd
CY2024Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.71
CY2024Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	94000000	usd
CY2024Q3	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	6000000	usd
CY2024Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	4000000	usd
CY2024Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9000000	usd
CY2024Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7366000000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5181000000	usd
	us-gaap	Profit Loss ProfitLoss	848000000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-798000000	usd
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.13
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	282000000	usd
	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	17000000	usd
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-4000000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	44000000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6406000000	usd
	cma	Cumulative Effect Of Change In Accounting Principle CumulativeEffectOfChangeInAccountingPrinciple	-4000000	usd
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.13
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	283000000	usd
	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	17000000	usd
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-2000000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	45000000	usd
CY2024Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7366000000	usd
	us-gaap	Profit Loss ProfitLoss	528000000	usd
	us-gaap	Profit Loss ProfitLoss	848000000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	28000000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	77000000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	13000000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-25000000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	70000000	usd
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	64000000	usd
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-8000000	usd
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0	usd
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	22000000	usd
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	-55000000	usd
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	70000000	usd
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-188000000	usd
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	134000000	usd
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-432000000	usd
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	916000000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	955000000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	129000000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1524000000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	2061000000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	130000000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	0	usd
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-1561000000	usd
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	15000000	usd
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	0	usd
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	27000000	usd
	cma	Net Increase In Fixed Assets NetIncreaseInFixedAssets	118000000	usd
	cma	Net Increase In Fixed Assets NetIncreaseInFixedAssets	93000000	usd
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	551000000	usd
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	504000000	usd
	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	274000000	usd
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	26000000	usd
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	27000000	usd
CY2024Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	18139000000	usd
CY2024Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0	usd
CY2024Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2253000000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	15886000000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	19541000000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2672000000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	16869000000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	1000000	usd
CY2024Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	0	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	15786000000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	2253000000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	15787000000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	2253000000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	1194	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	10000000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	0	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	16857000000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	2672000000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	16867000000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	2672000000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	1250	usd
CY2024Q3	us-gaap	Interest Receivable InterestReceivable	36000000	usd
CY2023Q4	us-gaap	Interest Receivable InterestReceivable	40000000	usd
CY2023Q3	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	0	usd
CY2024Q3	us-gaap	Financing Receivable Modified Weighted Average Term Increase From Modification FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification	P1Y5M23D
CY2023Q3	us-gaap	Financing Receivable Modified Weighted Average Term Increase From Modification FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification	P0Y9M7D
	us-gaap	Financing Receivable Modified Weighted Average Term Increase From Modification FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification	P1Y3M11D
	us-gaap	Financing Receivable Modified Weighted Average Term Increase From Modification FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification	P0Y11M1D
CY2024Q3	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	798000000	usd
CY2024Q3	us-gaap	Interest Expense Operating InterestExpenseOperating	448000000	usd
CY2023Q3	us-gaap	Interest Expense Operating InterestExpenseOperating	502000000	usd
	us-gaap	Interest Expense Operating InterestExpenseOperating	1357000000	usd
	us-gaap	Interest Expense Operating InterestExpenseOperating	1196000000	usd
CY2024Q3	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	13000000	usd
CY2023Q3	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	6000000	usd
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	37000000	usd
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	22000000	usd
CY2024Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	12000000	usd
CY2023Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	12000000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	33000000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	36000000	usd
CY2024Q3	us-gaap	Financing Receivable Excluding Accrued Interest Modified Period FinancingReceivableExcludingAccruedInterestModifiedPeriod	121000000	usd
CY2024Q3	us-gaap	Financing Receivable Modification To Total Financing Receivables Excluding Accrued Interest Percent FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent	0.0024
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Modified Period FinancingReceivableExcludingAccruedInterestModifiedPeriod	75000000	usd
CY2023Q3	us-gaap	Financing Receivable Modification To Total Financing Receivables Excluding Accrued Interest Percent FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent	0.0014
	us-gaap	Financing Receivable Excluding Accrued Interest Modified Period FinancingReceivableExcludingAccruedInterestModifiedPeriod	264000000	usd
	us-gaap	Financing Receivable Modification To Total Financing Receivables Excluding Accrued Interest Percent FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent	0.0052
	us-gaap	Financing Receivable Excluding Accrued Interest Modified Period FinancingReceivableExcludingAccruedInterestModifiedPeriod	140000000	usd
	us-gaap	Financing Receivable Modification To Total Financing Receivables Excluding Accrued Interest Percent FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent	0.0026
CY2024Q3	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	0	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	0	usd
CY2024Q3	us-gaap	Financing Receivable Modified Weighted Average Interest Rate Decrease From Modification FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification	0.0251
CY2023Q3	us-gaap	Financing Receivable Modified Weighted Average Interest Rate Decrease From Modification FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification	-0.0109
	us-gaap	Financing Receivable Modified Weighted Average Interest Rate Decrease From Modification FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification	0.0191
	us-gaap	Financing Receivable Modified Weighted Average Interest Rate Decrease From Modification FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification	-0.0089
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	7000000	usd
CY2024Q3	us-gaap	Goodwill Goodwill	635000000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	635000000	usd
CY2024Q3	cma	Derivative Assets Cash Collateral DerivativeAssetsCashCollateral	59000000	usd
CY2024Q3	us-gaap	Derivative Asset Fair Value Of Collateral DerivativeAssetFairValueOfCollateral	4000000	usd
CY2024Q3	cma	Cash Collateral Posted For Derivatives In Liability Position CashCollateralPostedForDerivativesInLiabilityPosition	5000000	usd
CY2024Q3	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	81434000000	usd
CY2024Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	832000000	usd
CY2024Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	949000000	usd
CY2023Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	70737000000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	1019000000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	1206000000	usd
CY2024Q3	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	325000000	usd
CY2024Q3	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	325000000	usd
CY2023Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	311000000	usd
CY2023Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	311000000	usd
CY2024Q3	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	55000000	usd
CY2024Q3	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	5000000	usd
CY2023Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	143000000	usd
CY2023Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	13000000	usd
CY2024Q3	us-gaap	Derivative Assets DerivativeAssets	452000000	usd
CY2024Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	619000000	usd
CY2023Q4	us-gaap	Derivative Assets DerivativeAssets	565000000	usd
CY2023Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	882000000	usd
CY2024Q3	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	323000000	usd
CY2024Q3	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	3000000	usd
CY2023Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	501000000	usd
CY2023Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	4000000	usd
CY2024Q3	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	129000000	usd
CY2024Q3	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	616000000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	64000000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	878000000	usd
CY2024Q3	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Assets DerivativeCreditRiskValuationAdjustmentDerivativeAssets	3000000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	-178000000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	-163000000	usd
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	-522000000	usd
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	-432000000	usd
CY2024Q3	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	117000000	usd
CY2023Q3	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	106000000	usd
	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	358000000	usd
	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	273000000	usd
	cma	De Designated Interest Swaps DeDesignatedInterestSwaps	7000000000.0	usd
	cma	Total Impact To Risk Management Hedging Income TotalImpactToRiskManagementHedgingIncome	-130000000	usd
CY2024Q1	cma	Impact To Risk Management Hedging Income ImpactToRiskManagementHedgingIncome	-39000000	usd
CY2023Q4	cma	Impact To Risk Management Hedging Income ImpactToRiskManagementHedgingIncome	-91000000	usd
CY2024Q2	cma	Amortized Probable Cashflows In Oci AmortizedProbableCashflowsInOCI	-52000000	usd
CY2024Q3	cma	Amortized Probable Cashflows In Oci AmortizedProbableCashflowsInOCI	-52000000	usd
CY2024Q3	cma	Letter Of Credit Fees LetterOfCreditFees	10000000	usd
CY2023Q3	cma	Letter Of Credit Fees LetterOfCreditFees	10000000	usd
	cma	Letter Of Credit Fees LetterOfCreditFees	30000000	usd
	cma	Letter Of Credit Fees LetterOfCreditFees	31000000	usd
CY2024Q3	cma	Risk Management Hedging Loss Income RiskManagementHedgingLossIncome	7000000	usd
CY2023Q3	cma	Risk Management Hedging Loss Income RiskManagementHedgingLossIncome	17000000	usd
	cma	Risk Management Hedging Loss Income RiskManagementHedgingLossIncome	-1000000	usd
	cma	Risk Management Hedging Loss Income RiskManagementHedgingLossIncome	32000000	usd
CY2024Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	12000000	usd
CY2024Q3	us-gaap	Noninterest Income NoninterestIncome	277000000	usd
CY2024Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	11000000	usd
CY2023Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	19000000	usd
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	66000000	usd
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	48000000	usd
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	17000000	usd
CY2024Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1292000000	usd
CY2023Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4972000000	usd
	us-gaap	Profit Loss ProfitLoss	528000000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	693000000	usd
	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	697000000	usd
	cma	Increase Decrease In Other Investing Assets And Liabilities Net IncreaseDecreaseInOtherInvestingAssetsAndLiabilitiesNet	1000000	usd
	cma	Increase Decrease In Other Investing Assets And Liabilities Net IncreaseDecreaseInOtherInvestingAssetsAndLiabilitiesNet	-2000000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	3008000000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	1779000000	usd
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-3705000000	usd
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-4529000000	usd
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-3565000000	usd
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	1601000000	usd
	us-gaap	Repayments Of Debt RepaymentsOfDebt	500000000	usd
	us-gaap	Repayments Of Debt RepaymentsOfDebt	850000000	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1000000000	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	4000000000	usd
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	17000000	usd
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	17000000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	13000000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	16000000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	278000000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	274000000	usd
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	5000000	usd
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	9000000	usd
	cma	Increase Decrease In Other Financing Assets And Liabilities Net IncreaseDecreaseInOtherFinancingAssetsAndLiabilitiesNet	1000000	usd
	cma	Increase Decrease In Other Financing Assets And Liabilities Net IncreaseDecreaseInOtherFinancingAssetsAndLiabilitiesNet	-2000000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-7072000000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-78000000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-3109000000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1830000000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6282000000	usd
CY2024Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6393000000	usd
CY2023Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8112000000	usd
	us-gaap	Interest Paid InterestPaid	1489000000	usd
	us-gaap	Interest Paid InterestPaid	1005000000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	77000000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	255000000	usd
CY2024Q3	cma	Amoritized Off Market Element AmoritizedOffMarketElement	43000000	usd
CY2024Q2	cma	Amoritized Off Market Element AmoritizedOffMarketElement	49000000	usd
CY2024Q3	cma	Net Benefit Loss Of Swaps NetBenefitLossOfSwaps	-9000000	usd
CY2024Q2	cma	Net Benefit Loss Of Swaps NetBenefitLossOfSwaps	-3000000	usd
CY2024Q3	cma	Gain Loss On Cash Flow Hedge De Designation GainLossOnCashFlowHedgeDeDesignation	7000000	usd
CY2024Q2	cma	Gain Loss On Cash Flow Hedge De Designation GainLossOnCashFlowHedgeDeDesignation	2000000	usd
CY2024Q3	cma	Price Alignment Income PriceAlignmentIncome	8000000	usd
CY2023Q3	cma	Price Alignment Income PriceAlignmentIncome	17000000	usd
	cma	Price Alignment Income PriceAlignmentIncome	38000000	usd
	cma	Price Alignment Income PriceAlignmentIncome	32000000	usd
CY2023Q3	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	-1000000	usd
	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	-1000000	usd
CY2024Q3	cma	Floating Rate Securities FloatingRateSecurities	3000000	usd
CY2023Q4	cma	Floating Rate Securities FloatingRateSecurities	4000000	usd
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	0	usd
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	0	usd
CY2024Q3	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	0	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	7300000000	usd
CY2024Q3	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	6400000000	usd
CY2024Q3	us-gaap	Securities Borrowed Liability SecuritiesBorrowedLiability	924000000	usd
CY2024Q3	cma	Liabilities Secured By Pledged Securities LiabilitiesSecuredByPledgedSecurities	375000000	usd
CY2024Q3	cma	Loans Past Due And Still Accruing LoansPastDueAndStillAccruing	168000000	usd
CY2024Q3	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	250000000	usd
CY2024Q3	cma	Current Loans CurrentLoans	50099000000	usd
CY2024Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	50517000000	usd
CY2023Q4	cma	Loans Past Due And Still Accruing LoansPastDueAndStillAccruing	218000000	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	178000000	usd
CY2023Q4	cma	Current Loans CurrentLoans	51717000000	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	52113000000	usd
CY2024Q3	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	4208000000	usd
CY2024Q3	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	5494000000	usd
CY2024Q3	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	8598000000	usd
CY2024Q3	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	5502000000	usd
CY2024Q3	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	2574000000	usd
CY2024Q3	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	4948000000	usd
CY2024Q3	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	19094000000	usd
CY2024Q3	us-gaap	Financing Receivable Revolving Converted To Term Loan FinancingReceivableRevolvingConvertedToTermLoan	99000000	usd
CY2024Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	50517000000	usd
CY2023Q4	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	6148000000	usd
CY2023Q4	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	9632000000	usd
CY2023Q4	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	6790000000	usd
CY2023Q4	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	3329000000	usd
CY2023Q4	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	2200000000	usd
CY2023Q4	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	4098000000	usd
CY2023Q4	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	19840000000	usd
CY2023Q4	us-gaap	Financing Receivable Revolving Converted To Term Loan FinancingReceivableRevolvingConvertedToTermLoan	76000000	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	52113000000	usd
CY2024Q3	cma	Loan Interest Receivable LoanInterestReceivable	277000000	usd
CY2023Q4	cma	Loan Interest Receivable LoanInterestReceivable	313000000	usd
CY2024Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	717000000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	728000000	usd
CY2024Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	14000000	usd
CY2023Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	14000000	usd
CY2024Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	720000000	usd
CY2023Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	736000000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	728000000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	661000000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	28000000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	77000000	usd
CY2024Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	720000000	usd
CY2023Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	736000000	usd
CY2024Q3	cma	Financing Receivable Ratio Of Allowance For Credit Losses To All Loans FinancingReceivableRatioOfAllowanceForCreditLossesToAllLoans	0.0143
CY2023Q3	cma	Financing Receivable Ratio Of Allowance For Credit Losses To All Loans FinancingReceivableRatioOfAllowanceForCreditLossesToAllLoans	0.0138
CY2023Q3	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	2000000	usd
CY2024Q3	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	2000000	usd
	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	8000000	usd
	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	8000000	usd
CY2024Q3	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	91000000	usd
CY2024Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	159000000	usd
CY2024Q3	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	250000000	usd
CY2023Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	109000000	usd
CY2023Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	69000000	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	178000000	usd
CY2024Q3	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	4000000	usd
CY2024Q3	cma	Allowance For Off Balance Sheet Credit Losses AllowanceForOffBalanceSheetCreditLosses	34000000	usd
CY2023Q4	cma	Allowance For Off Balance Sheet Credit Losses AllowanceForOffBalanceSheetCreditLosses	40000000	usd
CY2024Q3	cma	Carrying Value Of Unused Commitments To Extend Credit CarryingValueOfUnusedCommitmentsToExtendCredit	31000000	usd
CY2023Q4	cma	Carrying Value Of Unused Commitments To Extend Credit CarryingValueOfUnusedCommitmentsToExtendCredit	38000000	usd
CY2024Q3	cma	Risk Participations Covering Standby And Commercial Letters Of Credit RiskParticipationsCoveringStandbyAndCommercialLettersOfCredit	73000000	usd
CY2023Q4	cma	Risk Participations Covering Standby And Commercial Letters Of Credit RiskParticipationsCoveringStandbyAndCommercialLettersOfCredit	85000000	usd
CY2024Q3	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	3800000000	usd
CY2023Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	3600000000	usd
CY2024Q3	cma	Carrying Value Of Standby And Commercial Letters Of Credit CarryingValueOfStandbyAndCommercialLettersOfCredit	35000000	usd
CY2024Q3	cma	Carrying Value Of Standby And Commercial Letters Of Credit Included In Deferred Fees CarryingValueOfStandbyAndCommercialLettersOfCreditIncludedInDeferredFees	32000000	usd
CY2024Q3	cma	Carrying Value Of Standby And Commercial Letters Of Credit Included In Allowance For Credit Losses On Lending Related Commitments CarryingValueOfStandbyAndCommercialLettersOfCreditIncludedInAllowanceForCreditLossesOnLendingRelatedCommitments	3000000	usd
CY2023Q4	cma	Carrying Value Of Standby And Commercial Letters Of Credit CarryingValueOfStandbyAndCommercialLettersOfCredit	34000000	usd
CY2023Q4	cma	Carrying Value Of Standby And Commercial Letters Of Credit Included In Deferred Fees CarryingValueOfStandbyAndCommercialLettersOfCreditIncludedInDeferredFees	32000000	usd
CY2023Q4	cma	Carrying Value Of Standby And Commercial Letters Of Credit Included In Allowance For Credit Losses On Lending Related Commitments CarryingValueOfStandbyAndCommercialLettersOfCreditIncludedInAllowanceForCreditLossesOnLendingRelatedCommitments	2000000	usd
CY2024Q3	cma	Total Internally Classified Watch List Letters Of Credit TotalInternallyClassifiedWatchListLettersOfCredit	45000000	usd
CY2023Q4	cma	Total Internally Classified Watch List Letters Of Credit TotalInternallyClassifiedWatchListLettersOfCredit	50000000	usd
CY2024Q3	cma	Watch List Letters Of Credit As Percentage Of Total Letters Of Credit WatchListLettersOfCreditAsPercentageOfTotalLettersOfCredit	0.012
CY2023Q4	cma	Watch List Letters Of Credit As Percentage Of Total Letters Of Credit WatchListLettersOfCreditAsPercentageOfTotalLettersOfCredit	0.014
CY2024Q3	cma	Notional Amount Of Derivative Credit Risk Participation Agreements NotionalAmountOfDerivativeCreditRiskParticipationAgreements	1000000000.0	usd
CY2023Q4	cma	Notional Amount Of Derivative Credit Risk Participation Agreements NotionalAmountOfDerivativeCreditRiskParticipationAgreements	1000000000.0	usd
CY2024Q3	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	8000000	usd
CY2023Q4	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	2000000	usd
CY2024Q3	us-gaap	Variable Interest Entity Activity Between Vie And Entity Expense VariableInterestEntityActivityBetweenVIEAndEntityExpense	255000000	usd
	us-gaap	Variable Interest Entity Financial Or Other Support Amount VariableInterestEntityFinancialOrOtherSupportAmount	0	usd
	us-gaap	Variable Interest Entity Financial Or Other Support Amount VariableInterestEntityFinancialOrOtherSupportAmount	0	usd
CY2024Q3	us-gaap	Long Term Debt LongTermDebt	6786000000	usd
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	6206000000	usd
CY2024Q3	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	4000000000	usd
CY2024Q3	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	13300000000	usd
CY2024Q3	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	11000000	usd
CY2023Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	6000000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-2043000000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-2319000000	usd
	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	419000000	usd
	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-613000000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	94000000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-144000000	usd
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	325000000	usd
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-469000000	usd
CY2024Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1718000000	usd
CY2023Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-2788000000	usd
CY2023Q4	us-gaap	Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax AociLossCashFlowHedgeCumulativeGainLossAfterTax	-605000000	usd
CY2022Q4	us-gaap	Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax AociLossCashFlowHedgeCumulativeGainLossAfterTax	-942000000	usd
	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	-46000000	usd
	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	-871000000	usd
	us-gaap	Oci Equity Method Investment Before Tax OciEquityMethodInvestmentBeforeTax	-11000000	usd
	us-gaap	Oci Equity Method Investment Before Tax OciEquityMethodInvestmentBeforeTax	-204000000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-35000000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-667000000	usd
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-498000000	usd
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-432000000	usd
	cma	Amortization Of Unrealized Losses Related To De Designated Derivatives AmortizationOfUnrealizedLossesRelatedToDeDesignatedDerivatives	-24000000	usd
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	123000000	usd
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	101000000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-399000000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-331000000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	364000000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-336000000	usd
CY2024Q3	us-gaap	Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax AociLossCashFlowHedgeCumulativeGainLossAfterTax	-241000000	usd
CY2023Q3	us-gaap	Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax AociLossCashFlowHedgeCumulativeGainLossAfterTax	-1278000000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-400000000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-481000000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-20000000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-27000000	usd
	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-16000000	usd
	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-17000000	usd
	cma	Other Comprehensive Income Loss Reclassification Adjustment Pension And Other Postretirement Benefit Plans Recognized In Net Periodic Defined Benefit Cost Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentPensionAndOtherPostretirementBenefitPlansRecognizedInNetPeriodicDefinedBenefitCostBeforeTax	4000000	usd
	cma	Other Comprehensive Income Loss Reclassification Adjustment Pension And Other Postretirement Benefit Plans Recognized In Net Periodic Defined Benefit Cost Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentPensionAndOtherPostretirementBenefitPlansRecognizedInNetPeriodicDefinedBenefitCostBeforeTax	10000000	usd
	cma	Other Comprehensive Income Loss Reclassification Adjustment Pension And Other Postretirement Benefit Plans Recognized In Net Periodic Defined Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationAdjustmentPensionAndOtherPostretirementBenefitPlansRecognizedInNetPeriodicDefinedBenefitCostTax	0	usd
	cma	Other Comprehensive Income Loss Reclassification Adjustment Pension And Other Postretirement Benefit Plans Recognized In Net Periodic Defined Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationAdjustmentPensionAndOtherPostretirementBenefitPlansRecognizedInNetPeriodicDefinedBenefitCostTax	3000000	usd
	cma	Other Comprehensive Income Loss Reclassification Adjustment Pension And Other Postretirement Benefit Plans Recognized In Net Periodic Defined Benefit Cost Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentPensionAndOtherPostretirementBenefitPlansRecognizedInNetPeriodicDefinedBenefitCostNetOfTax	4000000	usd
	cma	Other Comprehensive Income Loss Reclassification Adjustment Pension And Other Postretirement Benefit Plans Recognized In Net Periodic Defined Benefit Cost Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentPensionAndOtherPostretirementBenefitPlansRecognizedInNetPeriodicDefinedBenefitCostNetOfTax	7000000	usd
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-4000000	usd
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-7000000	usd
CY2024Q3	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-396000000	usd
CY2023Q3	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-474000000	usd
CY2024Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2355000000	usd
CY2023Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-4540000000	usd
	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	-130000000	usd
CY2024Q3	us-gaap	Profit Loss ProfitLoss	184000000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	251000000	usd
	us-gaap	Profit Loss ProfitLoss	528000000	usd
	us-gaap	Profit Loss ProfitLoss	848000000	usd
CY2024Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	1000000	usd
CY2023Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	1000000	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	3000000	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	4000000	usd
CY2024Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	6000000	usd
CY2023Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	6000000	usd
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	17000000	usd
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	17000000	usd
CY2024Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	177000000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	244000000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	508000000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	827000000	usd
CY2024Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	133000000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	132000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	133000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	132000000	shares
CY2024Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.34
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.85
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.83
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.27
CY2024Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	133000000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	132000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	133000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	132000000	shares
CY2024Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1000000	shares
CY2023Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1000000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1000000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1000000	shares
CY2024Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	134000000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	133000000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	134000000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	133000000	shares
CY2024Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.33
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.84
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.80
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.24
CY2024Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8000000	usd
CY2024Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1000000	usd
CY2024Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	789000000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1000000000.0	usd
CY2024Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	-206000000	usd
CY2024Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	2000000	usd
CY2024Q3	cma	Deferred Tax Assets Federal Valuation Allowance DeferredTaxAssetsFederalValuationAllowance	6000000	usd
CY2024Q3	cma	Deferred Tax Assets Federal Valuation Allowance DeferredTaxAssetsFederalValuationAllowance	6000000	usd
CY2023Q4	cma	Deferred Tax Assets State Valuation Allowance DeferredTaxAssetsStateValuationAllowance	1000000	usd
CY2024Q3	cma	Deferred Tax Assets State Valuation Allowance DeferredTaxAssetsStateValuationAllowance	1000000	usd
	cma	Number Of Major Business Segments NumberOfMajorBusinessSegments	3	segment
	cma	Number Of Major Business Segments NumberOfMajorBusinessSegments	3	segment
CY2024Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	534000000	usd
CY2024Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	14000000	usd
CY2024Q3	us-gaap	Noninterest Income NoninterestIncome	277000000	usd
CY2024Q3	us-gaap	Noninterest Expense NoninterestExpense	562000000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	51000000	usd
CY2024Q3	us-gaap	Profit Loss ProfitLoss	184000000	usd
CY2024Q3	cma	Net Credit Related Charge Offs NetCreditRelatedChargeOffs	11000000	usd
CY2024Q3	cma	Segment Reporting Average Assets SegmentReportingAverageAssets	80231000000	usd
CY2024Q3	cma	Average Balance During Period Loans And Leases Receivable Net Of Deferred Income AverageBalanceDuringPeriodLoansAndLeasesReceivableNetOfDeferredIncome	50861000000	usd
CY2024Q3	cma	Average Balance During Period Deposits AverageBalanceDuringPeriodDeposits	63896000000	usd
CY2024Q3	cma	Return On Average Assets ReturnOnAverageAssets	0.0092
CY2024Q3	cma	Efficiency Ratio EfficiencyRatio	0.6880
CY2023Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	601000000	usd
CY2023Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	14000000	usd
CY2023Q3	us-gaap	Noninterest Income NoninterestIncome	295000000	usd
CY2023Q3	us-gaap	Noninterest Expense NoninterestExpense	555000000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	76000000	usd
CY2023Q3	us-gaap	Profit Loss ProfitLoss	251000000	usd
CY2023Q3	cma	Net Credit Related Charge Offs NetCreditRelatedChargeOffs	6000000	usd
CY2023Q3	cma	Segment Reporting Average Assets SegmentReportingAverageAssets	89150000000	usd
CY2023Q3	cma	Average Balance During Period Loans And Leases Receivable Net Of Deferred Income AverageBalanceDuringPeriodLoansAndLeasesReceivableNetOfDeferredIncome	53987000000	usd
CY2023Q3	cma	Average Balance During Period Deposits AverageBalanceDuringPeriodDeposits	65883000000	usd
CY2023Q3	cma	Return On Average Assets ReturnOnAverageAssets	0.0112
CY2023Q3	cma	Efficiency Ratio EfficiencyRatio	0.6186
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1615000000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	28000000	usd
	us-gaap	Noninterest Income NoninterestIncome	804000000	usd
	us-gaap	Noninterest Expense NoninterestExpense	1720000000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	143000000	usd
	us-gaap	Profit Loss ProfitLoss	528000000	usd
	cma	Net Credit Related Charge Offs NetCreditRelatedChargeOffs	36000000	usd
	cma	Segment Reporting Average Assets SegmentReportingAverageAssets	81016000000	usd
	cma	Average Balance During Period Loans And Leases Receivable Net Of Deferred Income AverageBalanceDuringPeriodLoansAndLeasesReceivableNetOfDeferredIncome	51100000000	usd
	cma	Average Balance During Period Deposits AverageBalanceDuringPeriodDeposits	64087000000	usd
	cma	Return On Average Assets ReturnOnAverageAssets	0.0087
	cma	Efficiency Ratio EfficiencyRatio	0.7108
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1930000000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	77000000	usd
	us-gaap	Noninterest Income NoninterestIncome	880000000	usd
	us-gaap	Noninterest Expense NoninterestExpense	1641000000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	244000000	usd
	us-gaap	Profit Loss ProfitLoss	848000000	usd
	cma	Net Credit Related Charge Offs NetCreditRelatedChargeOffs	2000000	usd
	cma	Segment Reporting Average Assets SegmentReportingAverageAssets	88229000000	usd
	cma	Average Balance During Period Loans And Leases Receivable Net Of Deferred Income AverageBalanceDuringPeriodLoansAndLeasesReceivableNetOfDeferredIncome	54276000000	usd
	cma	Average Balance During Period Deposits AverageBalanceDuringPeriodDeposits	66009000000	usd
	cma	Return On Average Assets ReturnOnAverageAssets	0.0129
	cma	Efficiency Ratio EfficiencyRatio	0.5826
CY2024Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	191000000	usd
CY2024Q3	us-gaap	Noninterest Income Other NoninterestIncomeOther	86000000	usd
CY2024Q3	us-gaap	Noninterest Income NoninterestIncome	277000000	usd
CY2023Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	201000000	usd
CY2023Q3	us-gaap	Noninterest Income Other NoninterestIncomeOther	94000000	usd
CY2023Q3	us-gaap	Noninterest Income NoninterestIncome	295000000	usd
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	581000000	usd
	us-gaap	Noninterest Income Other NoninterestIncomeOther	223000000	usd
	us-gaap	Noninterest Income NoninterestIncome	804000000	usd
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	606000000	usd
	us-gaap	Noninterest Income Other NoninterestIncomeOther	274000000	usd
	us-gaap	Noninterest Income NoninterestIncome	880000000	usd

Files In Submission

Name	View Source	Status
0000028412-24-000349-index-headers.html	Edgar Link	pending
0000028412-24-000349-index.html	Edgar Link	pending
0000028412-24-000349.txt	Edgar Link	pending
0000028412-24-000349-xbrl.zip	Edgar Link	pending
a2024q310q_ex311.htm	Edgar Link	pending
a2024q310q_ex312.htm	Edgar Link	pending
a2024q310q_ex32.htm	Edgar Link	pending
a2024q310q_ex991.htm	Edgar Link	pending
cma-20240930.htm	Edgar Link	pending
cma-20240930.xsd	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
cma-20240930_cal.xml	Edgar Link	unprocessable
cma-20240930_def.xml	Edgar Link	unprocessable
cma-20240930_lab.xml	Edgar Link	unprocessable
cma-20240930_pre.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
cma-20240930_htm.xml	Edgar Link	completed
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$CMA
COMERICA INC /NEW/ Stock $cma

2024 Q4 Form 10-Q Financial Statement

#000002841224000349 Filed on October 28, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CMA COMERICA INC /NEW/ Stock $cma

2024 Q4 Form 10-Q Financial Statement

#000002841224000349 Filed on October 28, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CMA
COMERICA INC /NEW/ Stock $cma