$CMA
COMERICA INC /NEW/ Stock $cma

$cma Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-Q Financial Statement

#000002841218000159 Filed on October 31, 2018

Income Statement

Concept	2018 Q4	2018 Q3	2017 Q3
Revenue	$704.0M	$675.0M	$579.0M
YoY Change	8.31%	16.58%	20.63%
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	$30.00M	$30.00M	$31.00M
YoY Change	0.0%	-3.23%	-3.13%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$90.00M	$76.00M	$33.00M
YoY Change	50.0%	130.3%	10.0%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$400.0M	$381.0M	$334.0M
YoY Change	21.21%	14.07%	56.81%
Income Tax	$90.00M	$63.00M	$108.0M
% Of Pretax Income	22.5%	16.54%	32.34%
Net Earnings	$310.0M	$318.0M	$226.0M
YoY Change	-4.91%	40.71%	51.68%
Net Earnings / Revenue	44.03%	47.11%	39.03%
Basic Earnings Per Share	$1.91	$1.89	$1.29
Diluted Earnings Per Share	$1.88	$1.86	$1.26
COMMON SHARES
Basic Shares Outstanding	161.7M shares	167.0M shares	174.0M shares
Diluted Shares Outstanding		170.0M shares	177.0M shares

Balance Sheet

Concept	2018 Q4	2018 Q3	2017 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$4.561B	$5.839B	$6.204B
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	$475.0M	$472.0M	$467.0M
YoY Change	1.93%	1.07%	-11.55%
Goodwill	$635.0M
YoY Change	0.0%
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	$70.82B	$71.45B	$72.02B
YoY Change	-1.05%	-0.79%	-2.84%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$1.243B	$1.154B	$1.018B
YoY Change	16.28%	13.36%	-17.5%
Deferred Revenue
YoY Change
Short-Term Debt	$44.00M	$84.00M	$509.0M
YoY Change	340.0%	-83.5%	4141.67%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$1.243B	$1.154B	$1.018B
YoY Change	16.28%	13.36%	-17.5%
LONG-TERM LIABILITIES
Long-Term Debt	$2.663B	$2.618B	$1.837B
YoY Change	46.16%	42.51%	-40.55%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$2.663B	$2.618B	$1.837B
YoY Change	46.16%	42.51%	-40.55%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.243B	$1.154B	$1.018B
Total Long-Term Liabilities	$2.663B	$2.618B	$1.837B
Total Liabilities	$63.31B	$63.66B	$63.98B
YoY Change	-0.46%	-0.5%	-3.64%
SHAREHOLDERS EQUITY
Retained Earnings	$8.781B	$8.587B	$7.746B
YoY Change	11.34%	10.86%	6.66%
Common Stock	$3.289B	$3.285B	$3.253B
YoY Change	0.8%	0.98%	-1.87%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$3.954B	$3.475B	$2.606B
YoY Change	44.52%	33.35%	1.88%
Treasury Stock Shares	68.08M shares	62.22M shares	53.84M shares
Shareholders Equity	$7.507B	$7.786B	$8.034B
YoY Change
Total Liabilities & Shareholders Equity	$70.82B	$71.45B	$72.02B
YoY Change	-1.05%	-0.79%	-2.84%

Cashflow Statement

Concept	2018 Q4	2018 Q3	2017 Q3
OPERATING ACTIVITIES
Net Income	$310.0M	$318.0M	$226.0M
YoY Change	-4.91%	40.71%	51.68%
Depreciation, Depletion And Amortization	$30.00M	$30.00M	$31.00M
YoY Change	0.0%	-3.23%	-3.13%
Cash From Operating Activities	$649.0M	$353.0M	$200.0M
YoY Change	176.17%	76.5%	30.72%
INVESTING ACTIVITIES
Capital Expenditures	-$25.00M	-$24.00M	-$16.00M
YoY Change	-3.85%	50.0%	-5.88%
Acquisitions
YoY Change
Other Investing Activities	-$1.158B	$767.0M	$223.0M
YoY Change	-1358.7%	243.95%	-79.54%
Cash From Investing Activities	-$1.183B	$743.0M	$207.0M
YoY Change	-1892.42%	258.94%	-80.71%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-744.0M	-917.0M	166.0M
YoY Change	12.73%	-652.41%	-93.86%
NET CHANGE
Cash From Operating Activities	649.0M	353.0M	200.0M
Cash From Investing Activities	-1.183B	743.0M	207.0M
Cash From Financing Activities	-744.0M	-917.0M	166.0M
Net Change In Cash	-1.278B	179.0M	573.0M
YoY Change	255.99%	-68.76%	-85.42%
FREE CASH FLOW
Cash From Operating Activities	$649.0M	$353.0M	$200.0M
Capital Expenditures	-$25.00M	-$24.00M	-$16.00M
Free Cash Flow	$674.0M	$377.0M	$216.0M
YoY Change	158.24%	74.54%	27.06%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	cma	Other Comprehensiveincome Loss Reclassification Adjustment From Aoci For Amortization Of Unrealized Gains Losses On Securities Transferred From Available For Sale To Held To Maturity Net Of Tax OtherComprehensiveincomeLossReclassificationAdjustmentFromAOCIForAmortizationOfUnrealizedGainsLossesOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturityNetOfTax	0	USD
	cma	Accretion Of Discount On Receivables Acquired In Transfer AccretionOfDiscountOnReceivablesAcquiredInTransfer	1000000	USD
	cma	Accretion Of Discount On Receivables Acquired In Transfer AccretionOfDiscountOnReceivablesAcquiredInTransfer	3000000	USD
CY2017Q4	cma	Allowance For Off Balance Sheet Credit Losses AllowanceForOffBalanceSheetCreditLosses	42000000	USD
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
	cma	Other Comprehensiveincome Loss Reclassification Adjustment From Aoci For Amortization Of Unrealized Gains Losses On Securities Transferred From Available For Sale To Held To Maturity Tax OtherComprehensiveincomeLossReclassificationAdjustmentFromAOCIForAmortizationOfUnrealizedGainsLossesOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturityTax	0	USD
	dei	Document Type DocumentType	10-Q
	us-gaap	Debt Securities Held To Maturity Transfer Amount DebtSecuritiesHeldToMaturityTransferAmount	0	USD
CY2018Q3	cma	Allowance For Off Balance Sheet Credit Losses AllowanceForOffBalanceSheetCreditLosses	33000000	USD
CY2017Q3	cma	Availableforsalesecuritiesreclassifiedtoequitysecurities Availableforsalesecuritiesreclassifiedtoequitysecurities	0	USD
CY2018Q3	cma	Availableforsalesecuritiesreclassifiedtoequitysecurities Availableforsalesecuritiesreclassifiedtoequitysecurities	81000000	USD
CY2018Q3	cma	Average Balance During Period Deposits AverageBalanceDuringPeriodDeposits	56093000000	USD
	cma	Average Balance During Period Deposits AverageBalanceDuringPeriodDeposits	56004000000	USD
CY2017Q3	cma	Average Balance During Period Deposits AverageBalanceDuringPeriodDeposits	56493000000	USD
	cma	Average Balance During Period Deposits AverageBalanceDuringPeriodDeposits	57128000000	USD
CY2018Q3	cma	Average Balance During Period Loans And Leases Receivable Net Of Deferred Income AverageBalanceDuringPeriodLoansAndLeasesReceivableNetOfDeferredIncome	48584000000	USD
	cma	Average Balance During Period Loans And Leases Receivable Net Of Deferred Income AverageBalanceDuringPeriodLoansAndLeasesReceivableNetOfDeferredIncome	48744000000	USD
CY2017Q3	cma	Average Balance During Period Loans And Leases Receivable Net Of Deferred Income AverageBalanceDuringPeriodLoansAndLeasesReceivableNetOfDeferredIncome	48663000000	USD
	cma	Average Balance During Period Loans And Leases Receivable Net Of Deferred Income AverageBalanceDuringPeriodLoansAndLeasesReceivableNetOfDeferredIncome	48431000000	USD
CY2018Q3	cma	Card Fees CardFees	61000000	USD
	cma	Card Fees CardFees	180000000	USD
CY2017Q3	cma	Card Fees CardFees	85000000	USD
	cma	Card Fees CardFees	242000000	USD
CY2017Q4	cma	Carrying Value Of Standby And Commercial Letters Of Credit CarryingValueOfStandbyAndCommercialLettersOfCredit	40000000	USD
CY2018Q3	cma	Carrying Value Of Standby And Commercial Letters Of Credit CarryingValueOfStandbyAndCommercialLettersOfCredit	33000000	USD
CY2017Q4	cma	Carrying Value Of Standby And Commercial Letters Of Credit Included In Allowance For Credit Losses On Lending Related Commitments CarryingValueOfStandbyAndCommercialLettersOfCreditIncludedInAllowanceForCreditLossesOnLendingRelatedCommitments	15000000	USD
CY2018Q3	cma	Carrying Value Of Standby And Commercial Letters Of Credit Included In Allowance For Credit Losses On Lending Related Commitments CarryingValueOfStandbyAndCommercialLettersOfCreditIncludedInAllowanceForCreditLossesOnLendingRelatedCommitments	8000000	USD
CY2017Q4	cma	Carrying Value Of Standby And Commercial Letters Of Credit Included In Deferred Fees CarryingValueOfStandbyAndCommercialLettersOfCreditIncludedInDeferredFees	25000000	USD
CY2018Q3	cma	Carrying Value Of Standby And Commercial Letters Of Credit Included In Deferred Fees CarryingValueOfStandbyAndCommercialLettersOfCreditIncludedInDeferredFees	25000000	USD
CY2017Q4	cma	Carrying Value Of Unused Commitments To Extend Credit CarryingValueOfUnusedCommitmentsToExtendCredit	27000000	USD
CY2018Q3	cma	Carrying Value Of Unused Commitments To Extend Credit CarryingValueOfUnusedCommitmentsToExtendCredit	25000000	USD
CY2018Q3	cma	Cash Collateral Posted For Derivatives In Liability Position CashCollateralPostedForDerivativesInLiabilityPosition	173000000	USD
CY2018Q3	cma	Commercial Lending Fees CommercialLendingFees	21000000	USD
	cma	Commercial Lending Fees CommercialLendingFees	62000000	USD
CY2017Q3	cma	Commercial Lending Fees CommercialLendingFees	21000000	USD
	cma	Commercial Lending Fees CommercialLendingFees	63000000	USD
CY2017Q4	cma	Cumulative Hedging Adjustmentona Discontinued Cash Flow Hedge CumulativeHedgingAdjustmentonaDiscontinuedCashFlowHedge	9000000	USD
CY2018Q3	cma	Cumulative Hedging Adjustmentona Discontinued Cash Flow Hedge CumulativeHedgingAdjustmentonaDiscontinuedCashFlowHedge	8000000	USD
CY2017Q4	cma	Cumulative Hedging Adjustmentson Derivative Swap CumulativeHedgingAdjustmentsonDerivativeSwap	56000000	USD
CY2018Q3	cma	Cumulative Hedging Adjustmentson Derivative Swap CumulativeHedgingAdjustmentsonDerivativeSwap	5000000	USD
	cma	Deferredtaxadjustmentfor Tax Cutand Jobact DeferredtaxadjustmentforTaxCutandJobact	99000000	USD
CY2017	cma	Deferredtaxadjustmentfor Tax Cutand Jobact DeferredtaxadjustmentforTaxCutandJobact	107000000	USD
CY2017Q4	cma	Deposits Customer Certificates Deposits DepositsCustomerCertificatesDeposits	2165000000	USD
CY2018Q3	cma	Deposits Customer Certificates Deposits DepositsCustomerCertificatesDeposits	2051000000	USD
CY2018Q3	cma	Derivative Assets Cash Collateral DerivativeAssetsCashCollateral	8000000	USD
CY2018Q3	cma	Discretetaxbenefits Discretetaxbenefits	23000000	USD
	cma	Discretetaxbenefits Discretetaxbenefits	48000000	USD
CY2017Q3	cma	Discretetaxbenefits Discretetaxbenefits	2000000	USD
	cma	Discretetaxbenefits Discretetaxbenefits	31000000	USD
CY2018Q3	cma	Efficiency Ratio EfficiencyRatio	0.5293
	cma	Efficiency Ratio EfficiencyRatio	0.5412
CY2017Q3	cma	Efficiency Ratio EfficiencyRatio	0.5633
	cma	Efficiency Ratio EfficiencyRatio	0.5882
CY2018Q3	cma	Fiduciaryincome Fiduciaryincome	51000000	USD
	cma	Fiduciaryincome Fiduciaryincome	155000000	USD
CY2017Q3	cma	Fiduciaryincome Fiduciaryincome	48000000	USD
	cma	Fiduciaryincome Fiduciaryincome	148000000	USD
CY2018Q3	cma	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	381000000	USD
	cma	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	1135000000	USD
CY2017Q3	cma	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	334000000	USD
	cma	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	904000000	USD
CY2018Q3	cma	Interest And Dividend Income Securities Afs And Htm InterestAndDividendIncomeSecuritiesAFSAndHTM	66000000	USD
	cma	Interest And Dividend Income Securities Afs And Htm InterestAndDividendIncomeSecuritiesAFSAndHTM	194000000	USD
CY2017Q3	cma	Interest And Dividend Income Securities Afs And Htm InterestAndDividendIncomeSecuritiesAFSAndHTM	63000000	USD
	cma	Interest And Dividend Income Securities Afs And Htm InterestAndDividendIncomeSecuritiesAFSAndHTM	186000000	USD
CY2017Q4	cma	Leases Receivable Commercial Lease Financing Net Of Deferred Income LeasesReceivableCommercialLeaseFinancingNetOfDeferredIncome	468000000	USD
CY2018Q3	cma	Leases Receivable Commercial Lease Financing Net Of Deferred Income LeasesReceivableCommercialLeaseFinancingNetOfDeferredIncome	471000000	USD
CY2018Q3	cma	Letter Of Credit Fees LetterOfCreditFees	9000000	USD
	cma	Letter Of Credit Fees LetterOfCreditFees	30000000	USD
CY2017Q3	cma	Letter Of Credit Fees LetterOfCreditFees	11000000	USD
	cma	Letter Of Credit Fees LetterOfCreditFees	34000000	USD
CY2018Q3	cma	Liabilities Secured By Pledged Securities LiabilitiesSecuredByPledgedSecurities	224000000	USD
CY2017Q4	cma	Loans And Leases Receivable Consumer Loans Net Of Deferred Income LoansAndLeasesReceivableConsumerLoansNetOfDeferredIncome	2554000000	USD
CY2018Q3	cma	Loans And Leases Receivable Consumer Loans Net Of Deferred Income LoansAndLeasesReceivableConsumerLoansNetOfDeferredIncome	2436000000	USD
CY2017Q4	cma	Loans And Leases Receivable Consumer Mortgage Net Of Deferred Income LoansAndLeasesReceivableConsumerMortgageNetOfDeferredIncome	1988000000	USD
CY2018Q3	cma	Loans And Leases Receivable Consumer Mortgage Net Of Deferred Income LoansAndLeasesReceivableConsumerMortgageNetOfDeferredIncome	1947000000	USD
CY2017Q4	cma	Loans And Leases Receivable Foreign Net Of Deferred Income Other LoansAndLeasesReceivableForeignNetOfDeferredIncomeOther	983000000	USD
CY2018Q3	cma	Loans And Leases Receivable Foreign Net Of Deferred Income Other LoansAndLeasesReceivableForeignNetOfDeferredIncomeOther	1090000000	USD
CY2017Q4	cma	Loans Receivable Commercial Financial And Agricultural Net Of Deferred Income LoansReceivableCommercialFinancialAndAgriculturalNetOfDeferredIncome	31060000000	USD
CY2018Q3	cma	Loans Receivable Commercial Financial And Agricultural Net Of Deferred Income LoansReceivableCommercialFinancialAndAgriculturalNetOfDeferredIncome	30889000000	USD
CY2017Q4	cma	Loans Receivable Commercial Mortgage Net Of Deferred Income LoansReceivableCommercialMortgageNetOfDeferredIncome	9159000000	USD
CY2018Q3	cma	Loans Receivable Commercial Mortgage Net Of Deferred Income LoansReceivableCommercialMortgageNetOfDeferredIncome	9019000000	USD
	cma	Longest Expiration Year Letters Of Credit LongestExpirationYearLettersOfCredit	2028
CY2018Q3	cma	Net Credit Related Charge Offs NetCreditRelatedChargeOffs	15000000	USD
	cma	Net Credit Related Charge Offs NetCreditRelatedChargeOffs	40000000	USD
CY2017Q3	cma	Net Credit Related Charge Offs NetCreditRelatedChargeOffs	25000000	USD
	cma	Net Credit Related Charge Offs NetCreditRelatedChargeOffs	76000000	USD
	cma	Net Increase In Fixed Assets NetIncreaseInFixedAssets	65000000	USD
	cma	Net Increase In Fixed Assets NetIncreaseInFixedAssets	43000000	USD
CY2017Q4	cma	Net Unrealized Losses On Available For Sale Securities Transferred To Held To Maturity NetUnrealizedLossesOnAvailableForSaleSecuritiesTransferredToHeldToMaturity	9000000	USD
CY2017Q4	cma	Notional Amount Of Derivative Credit Risk Participation Agreements NotionalAmountOfDerivativeCreditRiskParticipationAgreements	549000000	USD
CY2018Q3	cma	Notional Amount Of Derivative Credit Risk Participation Agreements NotionalAmountOfDerivativeCreditRiskParticipationAgreements	631000000	USD
	cma	Number Of Geographic Markets NumberOfGeographicMarkets	3	markets
	cma	Number Of Major Business Segments NumberOfMajorBusinessSegments	3	segments
	cma	Other Comprehensive Income Loss Reclassification Adjustment Pension And Other Postretirement Benefit Plans Recognized In Net Periodic Defined Benefit Cost Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentPensionAndOtherPostretirementBenefitPlansRecognizedInNetPeriodicDefinedBenefitCostBeforeTax	25000000	USD
	cma	Other Comprehensive Income Loss Reclassification Adjustment Pension And Other Postretirement Benefit Plans Recognized In Net Periodic Defined Benefit Cost Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentPensionAndOtherPostretirementBenefitPlansRecognizedInNetPeriodicDefinedBenefitCostBeforeTax	18000000	USD
	cma	Other Comprehensive Income Loss Reclassification Adjustment Pension And Other Postretirement Benefit Plans Recognized In Net Periodic Defined Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationAdjustmentPensionAndOtherPostretirementBenefitPlansRecognizedInNetPeriodicDefinedBenefitCostTax	6000000	USD
	cma	Other Comprehensive Income Loss Reclassification Adjustment Pension And Other Postretirement Benefit Plans Recognized In Net Periodic Defined Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationAdjustmentPensionAndOtherPostretirementBenefitPlansRecognizedInNetPeriodicDefinedBenefitCostTax	7000000	USD
	cma	Other Comprehensiveincome Loss Reclassification Adjustment From Aoci For Amortization Of Unrealized Gains Losses On Securities Transferred From Available For Sale To Held To Maturity Net Of Tax OtherComprehensiveincomeLossReclassificationAdjustmentFromAOCIForAmortizationOfUnrealizedGainsLossesOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturityNetOfTax	-2000000	USD
	cma	Other Comprehensiveincome Loss Reclassification Adjustment From Aoci For Amortization Of Unrealized Gains Losses On Securities Transferred From Available For Sale To Held To Maturity Tax OtherComprehensiveincomeLossReclassificationAdjustmentFromAOCIForAmortizationOfUnrealizedGainsLossesOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturityTax	-1000000	USD
	cma	Other Comprehensiveincome Loss Reclassification Adjustment From Aoci For Amortization Of Unrealized Gains Losses On Securities Transferred From Available For Sale To Held To Maturitybeforetax OtherComprehensiveincomeLossReclassificationAdjustmentFromAOCIForAmortizationOfUnrealizedGainsLossesOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturitybeforetax	0	USD
	cma	Other Comprehensiveincome Loss Reclassification Adjustment From Aoci For Amortization Of Unrealized Gains Losses On Securities Transferred From Available For Sale To Held To Maturitybeforetax OtherComprehensiveincomeLossReclassificationAdjustmentFromAOCIForAmortizationOfUnrealizedGainsLossesOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturitybeforetax	-3000000	USD
CY2018Q3	cma	Othersourcesofnoninterestincome Othersourcesofnoninterestincome	44000000	USD
	cma	Othersourcesofnoninterestincome Othersourcesofnoninterestincome	163000000	USD
CY2017Q3	cma	Othersourcesofnoninterestincome Othersourcesofnoninterestincome	24000000	USD
	cma	Othersourcesofnoninterestincome Othersourcesofnoninterestincome	82000000	USD
CY2018Q3	cma	Outside Processing Fee Expense OutsideProcessingFeeExpense	65000000	USD
	cma	Outside Processing Fee Expense OutsideProcessingFeeExpense	190000000	USD
CY2017Q3	cma	Outside Processing Fee Expense OutsideProcessingFeeExpense	92000000	USD
	cma	Outside Processing Fee Expense OutsideProcessingFeeExpense	267000000	USD
CY2017Q4	cma	Real Estate Construction Loans Net Of Deferred Income RealEstateConstructionLoansNetOfDeferredIncome	2961000000	USD
CY2018Q3	cma	Real Estate Construction Loans Net Of Deferred Income RealEstateConstructionLoansNetOfDeferredIncome	3158000000	USD
CY2017Q4	cma	Reduced Rate Loans ReducedRateLoans	8000000	USD
CY2018Q3	cma	Reduced Rate Loans ReducedRateLoans	9000000	USD
	cma	Remeasurementofdeferredtaxes Remeasurementofdeferredtaxes	8000000	USD
CY2018Q3	cma	Return On Average Assets ReturnOnAverageAssets	0.0177
	cma	Return On Average Assets ReturnOnAverageAssets	0.0175
CY2017Q3	cma	Return On Average Assets ReturnOnAverageAssets	0.0125
	cma	Return On Average Assets ReturnOnAverageAssets	0.0118
CY2017Q4	cma	Risk Participations Covering Standby And Commercial Letters Of Credit RiskParticipationsCoveringStandbyAndCommercialLettersOfCredit	127000000	USD
CY2018Q3	cma	Risk Participations Covering Standby And Commercial Letters Of Credit RiskParticipationsCoveringStandbyAndCommercialLettersOfCredit	136000000	USD
CY2018Q3	cma	Segment Reporting Average Assets SegmentReportingAverageAssets	71210000000	USD
	cma	Segment Reporting Average Assets SegmentReportingAverageAssets	70689000000	USD
CY2017Q3	cma	Segment Reporting Average Assets SegmentReportingAverageAssets	71251000000	USD
	cma	Segment Reporting Average Assets SegmentReportingAverageAssets	71470000000	USD
CY2018Q3	cma	Servicechargesondepositaccounts Servicechargesondepositaccounts	53000000	USD
	cma	Servicechargesondepositaccounts Servicechargesondepositaccounts	160000000	USD
CY2017Q3	cma	Servicechargesondepositaccounts Servicechargesondepositaccounts	57000000	USD
	cma	Servicechargesondepositaccounts Servicechargesondepositaccounts	172000000	USD
CY2018Q3	cma	Software Expenses SoftwareExpenses	32000000	USD
	cma	Software Expenses SoftwareExpenses	95000000	USD
CY2017Q3	cma	Software Expenses SoftwareExpenses	35000000	USD
	cma	Software Expenses SoftwareExpenses	95000000	USD
	cma	Stock Issued During Period Value Warrants Exercised StockIssuedDuringPeriodValueWarrantsExercised	0	USD
	cma	Stock Issued During Period Value Warrants Exercised StockIssuedDuringPeriodValueWarrantsExercised	0	USD
CY2017Q4	cma	Total Internally Classified Watch List Letters Of Credit TotalInternallyClassifiedWatchListLettersOfCredit	88000000	USD
CY2018Q3	cma	Total Internally Classified Watch List Letters Of Credit TotalInternallyClassifiedWatchListLettersOfCredit	73000000	USD
CY2017Q4	cma	Total Nonperforming Assets TotalNonperformingAssets	415000000	USD
CY2018Q3	cma	Total Nonperforming Assets TotalNonperformingAssets	240000000	USD
CY2017Q4	cma	Total Nonperforming Loans TotalNonperformingLoans	410000000	USD
CY2018Q3	cma	Total Nonperforming Loans TotalNonperformingLoans	239000000	USD
CY2017Q4	cma	Watch List Letters Of Credit As Percentage Of Total Letters Of Credit WatchListLettersOfCreditAsPercentageOfTotalLettersOfCredit	0.027
CY2018Q3	cma	Watch List Letters Of Credit As Percentage Of Total Letters Of Credit WatchListLettersOfCreditAsPercentageOfTotalLettersOfCredit	0.0224
	dei	Amendment Flag AmendmentFlag	false
	dei	Entity Central Index Key EntityCentralIndexKey	0000028412
	dei	Document Period End Date DocumentPeriodEndDate	2018-09-30
CY2018Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	161698314	shares
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	Comerica INC /NEW/
	dei	Entity Small Business EntitySmallBusiness	false
CY2017Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	20545000000	USD
CY2018Q3	invest	Derivative Notional Amount DerivativeNotionalAmount	21890000000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-3000000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-5000000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-33000000	USD
CY2017Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-20000000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-101000000	USD
CY2018Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-280000000	USD
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CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-350000000	USD
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CY2017Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-359000000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-451000000	USD
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	us-gaap	Advertising Expense AdvertisingExpense	22000000	USD
CY2017Q3	us-gaap	Advertising Expense AdvertisingExpense	8000000	USD
	us-gaap	Advertising Expense AdvertisingExpense	19000000	USD
CY2017Q4	us-gaap	Assets Assets	71567000000	USD
CY2018Q3	us-gaap	Assets Assets	71448000000	USD
CY2017Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	10938000000	USD
CY2018Q3	us-gaap	Available For Sale Securities AvailableForSaleSecurities	11862000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	23000000	USD
CY2018Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	6000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	146000000	USD
CY2018Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	371000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	11061000000	USD
CY2018Q3	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	12227000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	127000000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	235000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	175000000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	371000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	10624000000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	10677000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	48000000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	136000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	6572000000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	6132000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	4052000000	USD
CY2018Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	4545000000	USD
CY2018Q3	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	409	Security
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CY2017Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	12000000	USD
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CY2018Q3	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	7000000	USD
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	20000000	USD
CY2017Q3	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	6000000	USD
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	17000000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	7218000000	USD
CY2017Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6204000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	5845000000	USD
CY2018Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	5839000000	USD
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CY2017Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	1438000000	USD
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CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	5
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CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	325000000	shares
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CY2017Q4	us-gaap	Common Stock Value CommonStockValue	1141000000	USD
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CY2018Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	296000000	USD
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CY2017Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	228000000	USD
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CY2017Q4	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	0	USD
CY2018Q3	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	2000000	USD
CY2018Q3	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-20000000	USD
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CY2017Q3	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	0	USD
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CY2018Q3	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	317000000	USD
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CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	141000000	USD
CY2018Q3	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	1000000	USD
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CY2018Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	153000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	4000000	USD
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CY2017Q4	us-gaap	Deposits Deposits	57903000000	USD
CY2018Q3	us-gaap	Deposits Deposits	56006000000	USD
CY2017Q4	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	21500000000	USD
CY2018Q3	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	22449000000	USD
CY2017Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	2152000000	USD
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CY2017Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	1000000	USD
CY2018Q3	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	6000000	USD
CY2017Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	49000000	USD
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CY2017Q4	us-gaap	Derivative Assets DerivativeAssets	142000000	USD
CY2018Q3	us-gaap	Derivative Assets DerivativeAssets	219000000	USD
CY2017Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	3000000	USD
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CY2017Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	24000000	USD
CY2018Q3	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	8000000	USD
CY2017Q4	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Assets DerivativeCreditRiskValuationAdjustmentDerivativeAssets	4000000	USD
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CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	192000000	USD
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CY2018Q3	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	209000000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	190000000	USD
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CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	78000000	USD
CY2018Q3	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	141000000	USD
CY2017Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	102000000	USD
CY2018Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	149000000	USD
CY2017Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	39000000	USD
CY2018Q3	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	173000000	USD
CY2018Q3	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	10000000	USD
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CY2017Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	53000000	USD
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CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.89
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CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.29
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CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.86
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CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.26
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CY2018Q3	us-gaap	Equipment Expense EquipmentExpense	12000000	USD
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CY2017Q3	us-gaap	Equipment Expense EquipmentExpense	12000000	USD
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CY2018Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	11000000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	36000000	USD
CY2017Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	13000000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	38000000	USD
CY2018Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	5000000	USD
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CY2017Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	61000000	USD
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CY2017Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	48434000000	USD
CY2018Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	48526000000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	337000000	USD
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CY2017Q4	us-gaap	Foreclosed Assets ForeclosedAssets	5000000	USD
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CY2018Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	12000000	USD
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CY2017Q3	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	0	USD
	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	0	USD
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CY2017Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1266000000	USD
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CY2018Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	322000000	USD
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CY2017Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	477000000	USD
CY2018Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	303000000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	67000000	USD
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CY2018Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	387000000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	173000000	USD
CY2018Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	138000000	USD
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CY2018Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	165000000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	63000000	USD
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CY2018Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2000000	shares
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CY2018Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	675000000	USD
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CY2018Q3	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	581000000	USD
	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	1658000000	USD
CY2017Q3	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	500000000	USD
	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	1374000000	USD
CY2017Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	25832000000	USD
CY2018Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	26705000000	USD
CY2017Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	4407000000	USD
CY2018Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	4894000000	USD
CY2017Q4	us-gaap	Interest Bearing Foreign Deposit Time Deposits InterestBearingForeignDepositTimeDeposits	15000000	USD
CY2018Q3	us-gaap	Interest Bearing Foreign Deposit Time Deposits InterestBearingForeignDepositTimeDeposits	13000000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	76000000	USD
	us-gaap	Interest Expense InterestExpense	177000000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	33000000	USD
	us-gaap	Interest Expense InterestExpense	88000000	USD
CY2018Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	35000000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	79000000	USD
CY2017Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	11000000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	29000000	USD
CY2018Q3	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	40000000	USD
	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	97000000	USD
CY2017Q3	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	19000000	USD
	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	56000000	USD
CY2018Q3	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	1000000	USD
	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	1000000	USD
CY2017Q3	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	3000000	USD
	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	3000000	USD
CY2018Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	599000000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	1755000000	USD
CY2017Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	522000000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	1459000000	USD
CY2018Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	599000000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1738000000	USD
CY2017Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	546000000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1516000000	USD
	us-gaap	Interest Paid InterestPaid	172000000	USD
	us-gaap	Interest Paid InterestPaid	89000000	USD
CY2018Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	254000000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	759000000	USD
CY2017Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	237000000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	713000000	USD
CY2018Q3	us-gaap	Legal Fees LegalFees	4000000	USD
	us-gaap	Legal Fees LegalFees	11000000	USD
CY2017Q3	us-gaap	Legal Fees LegalFees	4000000	USD
	us-gaap	Legal Fees LegalFees	14000000	USD
CY2017Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	3300000000	USD
CY2018Q3	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	3300000000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	63604000000	USD
CY2018Q3	us-gaap	Liabilities Liabilities	63662000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	71567000000	USD
CY2018Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	71448000000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	712000000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	664000000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	31000000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	24000000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	402000000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	230000000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	49173000000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	49010000000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	48461000000	USD
CY2018Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	48346000000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	4622000000	USD
CY2018Q3	us-gaap	Long Term Debt LongTermDebt	6418000000	USD
CY2018Q3	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	0	USD
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CY2017Q3	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	0	USD
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CY2018Q3	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	0	USD
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CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	316000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	919000000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	224000000	USD
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CY2017Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	32071000000	USD
CY2018Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	29301000000	USD
CY2018Q3	us-gaap	Noninterest Expense NoninterestExpense	452000000	USD
	us-gaap	Noninterest Expense NoninterestExpense	1346000000	USD
CY2017Q3	us-gaap	Noninterest Expense NoninterestExpense	463000000	USD
	us-gaap	Noninterest Expense NoninterestExpense	1377000000	USD
CY2018Q3	us-gaap	Noninterest Income NoninterestIncome	234000000	USD
	us-gaap	Noninterest Income NoninterestIncome	726000000	USD
CY2017Q3	us-gaap	Noninterest Income NoninterestIncome	275000000	USD
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CY2018Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	29000000	USD
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CY2017Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	24000000	USD
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CY2018Q3	us-gaap	Occupancy Net OccupancyNet	38000000	USD
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CY2017Q3	us-gaap	Occupancy Net OccupancyNet	38000000	USD
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CY2017Q4	us-gaap	Other Assets OtherAssets	4495000000	USD
CY2018Q3	us-gaap	Other Assets OtherAssets	4793000000	USD
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CY2017Q3	us-gaap	Payments For Restructuring PaymentsForRestructuring	6000000	USD
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	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	128000000	USD
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CY2017Q3	us-gaap	Restructuring Charges RestructuringCharges	7000000	USD
	us-gaap	Restructuring Charges RestructuringCharges	32000000	USD
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CY2017Q4	us-gaap	Restructuring Reserve RestructuringReserve	15000000	USD
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CY2018Q3	us-gaap	Restructuring Reserve RestructuringReserve	10000000	USD
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CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	190000000	USD
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CY2018Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7786000000	USD
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CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2736000000	USD
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CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	10000000	USD
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CY2018Q3	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	164000000	USD
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	170000000	shares
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CY2017Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	177000000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	179000000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	167000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	170000000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	174000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	175000000	shares
	us-gaap	Derivatives Methods Of Accounting Hedging Derivatives DerivativesMethodsOfAccountingHedgingDerivatives	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:8px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Derivatives Instruments and Hedging Activities</font></div><div style="line-height:120%;padding-top:8px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Corporation adopted ASU No. 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities” (ASU 2017-12), effective January 1, 2018. At transition, the Corporation elected to change the measurement methodology of all long-haul fair value hedges existing at December 31, 2017. The prior period effect of this election was a </font><font style="font-family:inherit;font-size:10pt;">$1 million</font><font style="font-family:inherit;font-size:10pt;"> reduction to opening retained earnings, included in cumulative effect of change in accounting principles in the Consolidated Statements of Shareholders' Equity. In addition, the Corporation made a transition election to reclassify the portfolio of held-to-maturity securities to available-for-sale in January 2018 as the securities are eligible to be hedged. This resulted in the recognition of additional unrealized losses of </font><font style="font-family:inherit;font-size:10pt;">$11 million</font><font style="font-family:inherit;font-size:10pt;"> at the date of transfer.</font></div></div>

Files In Submission

Name	View Source	Status
0000028412-18-000159-index-headers.html	Edgar Link	pending
0000028412-18-000159-index.html	Edgar Link	pending
0000028412-18-000159.txt	Edgar Link	pending
0000028412-18-000159-xbrl.zip	Edgar Link	pending
cma-20180930.xml	Edgar Link	completed
cma-20180930.xsd	Edgar Link	pending
cma-20180930_cal.xml	Edgar Link	unprocessable
cma-20180930_def.xml	Edgar Link	unprocessable
cma-20180930_lab.xml	Edgar Link	unprocessable
cma-20180930_pre.xml	Edgar Link	unprocessable
cma-2018q310q.htm	Edgar Link	pending
cma-2018q310q_ex311.htm	Edgar Link	pending
cma-2018q310q_ex312.htm	Edgar Link	pending
cma-2018q310q_ex32.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
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$CMA
COMERICA INC /NEW/ Stock $cma

2018 Q4 Form 10-Q Financial Statement

#000002841218000159 Filed on October 31, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CMA COMERICA INC /NEW/ Stock $cma

2018 Q4 Form 10-Q Financial Statement

#000002841218000159 Filed on October 31, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CMA
COMERICA INC /NEW/ Stock $cma