$CMA
COMERICA INC /NEW/ Stock $cma

$cma Overview Financials Valuation SEC Filings Company Website

2015 Q4 Form 10-Q Financial Statement

#000002841215000127 Filed on October 29, 2015

Income Statement

Concept	2015 Q4	2015 Q3	2014 Q3
Revenue	$457.0M	$448.0M	$436.0M
YoY Change	4.34%	2.75%	-0.68%
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	$28.00M	$30.00M	$31.00M
YoY Change	-9.68%	-3.23%	3.33%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$24.00M	$26.00M	$22.00M
YoY Change	4.35%	18.18%	-18.52%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$157.0M	$199.0M	$227.0M
YoY Change	-28.31%	-12.33%	12.94%
Income Tax	$41.00M	$63.00M	$73.00M
% Of Pretax Income	26.11%	31.66%	32.16%
Net Earnings	$116.0M	$136.0M	$154.0M
YoY Change	-22.15%	-11.69%	4.76%
Net Earnings / Revenue	25.38%	30.36%	35.32%
Basic Earnings Per Share	$0.65	$0.76	$0.85
Diluted Earnings Per Share	$0.64	$0.74	$0.82
COMMON SHARES
Basic Shares Outstanding	176.7M shares	176.0M shares	179.0M shares
Diluted Shares Outstanding		181.0M shares	185.0M shares

Balance Sheet

Concept	2015 Q4	2015 Q3	2014 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$6.147B	$7.200B	$7.787B
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	$550.0M	$541.0M	$524.0M
YoY Change	3.38%	3.24%	-13.25%
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	$71.88B	$71.01B	$68.89B
YoY Change	3.89%	3.08%	6.52%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$1.383B	$1.413B	$1.002B
YoY Change	-8.23%	41.02%	0.1%
Deferred Revenue
YoY Change
Short-Term Debt	$23.00M	$109.0M	$202.0M
YoY Change	-80.17%	-46.04%	-10.62%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$1.383B	$1.413B	$1.002B
YoY Change	-8.23%	41.02%	0.1%
LONG-TERM LIABILITIES
Long-Term Debt	$3.058B	$3.100B	$2.669B
YoY Change	14.32%	16.15%	-25.13%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$3.058B	$3.100B	$2.669B
YoY Change	14.32%	16.15%	-25.13%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.383B	$1.413B	$1.002B
Total Long-Term Liabilities	$3.058B	$3.100B	$2.669B
Total Liabilities	$64.32B	$63.39B	$61.45B
YoY Change	4.1%	3.15%	6.5%
SHAREHOLDERS EQUITY
Retained Earnings	$7.084B	$7.007B	$6.631B
YoY Change	5.04%	5.67%	6.28%
Common Stock	$3.314B	$3.306B	$3.324B
YoY Change	-0.45%	-0.54%	0.36%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$2.409B	$2.346B	$2.205B
YoY Change	6.64%	6.39%	8.04%
Treasury Stock Shares	52.46M shares	51.01M shares	47.99M shares
Shareholders Equity	$7.560B	$7.622B	$7.433B
YoY Change
Total Liabilities & Shareholders Equity	$71.88B	$71.01B	$68.89B
YoY Change	3.89%	3.08%	6.52%

Cashflow Statement

Concept	2015 Q4	2015 Q3	2014 Q3
OPERATING ACTIVITIES
Net Income	$116.0M	$136.0M	$154.0M
YoY Change	-22.15%	-11.69%	4.76%
Depreciation, Depletion And Amortization	$28.00M	$30.00M	$31.00M
YoY Change	-9.68%	-3.23%	3.33%
Cash From Operating Activities	$199.0M	$269.0M	$219.0M
YoY Change	168.92%	22.83%	42.21%
INVESTING ACTIVITIES
Capital Expenditures	-$41.00M	-$24.00M	-$7.000M
YoY Change	28.13%	242.86%	-75.0%
Acquisitions
YoY Change
Other Investing Activities	-$2.191B	$425.0M	$197.0M
YoY Change	58.31%	115.74%	-86.22%
Cash From Investing Activities	-$2.232B	$401.0M	$190.0M
YoY Change	57.63%	111.05%	-86.45%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	980.0M	565.0M	3.484B
YoY Change	-362.03%	-83.78%	116.8%
NET CHANGE
Cash From Operating Activities	199.0M	269.0M	219.0M
Cash From Investing Activities	-2.232B	401.0M	190.0M
Cash From Financing Activities	980.0M	565.0M	3.484B
Net Change In Cash	-1.053B	1.235B	3.893B
YoY Change	-38.64%	-68.28%	23.08%
FREE CASH FLOW
Cash From Operating Activities	$199.0M	$269.0M	$219.0M
Capital Expenditures	-$41.00M	-$24.00M	-$7.000M
Free Cash Flow	$240.0M	$293.0M	$226.0M
YoY Change	126.42%	29.65%	24.18%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	cma	Accretion Of Discount On Receivables Acquired In Transfer AccretionOfDiscountOnReceivablesAcquiredInTransfer	25000000	USD
	cma	Accretion Of Discount On Receivables Acquired In Transfer AccretionOfDiscountOnReceivablesAcquiredInTransfer	6000000	USD
	cma	Adjustment To Paid In Capital Warrant Repurchased And Retired AdjustmentToPaidInCapitalWarrantRepurchasedAndRetired	10000000	USD
CY2014Q4	cma	Allowance For Off Balance Sheet Credit Losses AllowanceForOffBalanceSheetCreditLosses	41000000	USD
CY2015Q3	cma	Allowance For Off Balance Sheet Credit Losses AllowanceForOffBalanceSheetCreditLosses	48000000	USD
CY2014Q3	cma	Average Balance During Period Deposits AverageBalanceDuringPeriodDeposits	55163000000	USD
	cma	Average Balance During Period Deposits AverageBalanceDuringPeriodDeposits	53781000000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	0	USD
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	0	USD
CY2014Q3	cma	Average Balance During Period Loans And Leases Receivable Net Of Deferred Income AverageBalanceDuringPeriodLoansAndLeasesReceivableNetOfDeferredIncome	47159000000	USD
	cma	Average Balance During Period Loans And Leases Receivable Net Of Deferred Income AverageBalanceDuringPeriodLoansAndLeasesReceivableNetOfDeferredIncome	46327000000	USD
CY2015Q3	cma	Average Balance During Period Loans And Leases Receivable Net Of Deferred Income AverageBalanceDuringPeriodLoansAndLeasesReceivableNetOfDeferredIncome	48972000000	USD
	cma	Average Balance During Period Loans And Leases Receivable Net Of Deferred Income AverageBalanceDuringPeriodLoansAndLeasesReceivableNetOfDeferredIncome	48655000000	USD
CY2015Q3	cma	Average Balance During Period Deposits AverageBalanceDuringPeriodDeposits	59140000000	USD
	cma	Average Balance During Period Deposits AverageBalanceDuringPeriodDeposits	57851000000	USD
CY2014Q4	cma	Carrying Value Of Standby And Commercial Letters Of Credit CarryingValueOfStandbyAndCommercialLettersOfCredit	55000000	USD
CY2015Q3	cma	Carrying Value Of Standby And Commercial Letters Of Credit CarryingValueOfStandbyAndCommercialLettersOfCredit	54000000	USD
CY2014Q4	cma	Carrying Value Of Standby And Commercial Letters Of Credit Included In Allowance For Credit Losses On Lending Related Commitments CarryingValueOfStandbyAndCommercialLettersOfCreditIncludedInAllowanceForCreditLossesOnLendingRelatedCommitments	11000000	USD
CY2015Q3	cma	Carrying Value Of Standby And Commercial Letters Of Credit Included In Allowance For Credit Losses On Lending Related Commitments CarryingValueOfStandbyAndCommercialLettersOfCreditIncludedInAllowanceForCreditLossesOnLendingRelatedCommitments	14000000	USD
CY2014Q4	cma	Carrying Value Of Standby And Commercial Letters Of Credit Included In Deferred Fees CarryingValueOfStandbyAndCommercialLettersOfCreditIncludedInDeferredFees	44000000	USD
CY2015Q3	cma	Carrying Value Of Standby And Commercial Letters Of Credit Included In Deferred Fees CarryingValueOfStandbyAndCommercialLettersOfCreditIncludedInDeferredFees	40000000	USD
CY2014Q4	cma	Carrying Value Of Unused Commitments To Extend Credit CarryingValueOfUnusedCommitmentsToExtendCredit	30000000	USD
CY2015Q3	cma	Carrying Value Of Unused Commitments To Extend Credit CarryingValueOfUnusedCommitmentsToExtendCredit	34000000	USD
CY2015Q3	cma	Cash Collateral Posted For Derivatives In Liability Position CashCollateralPostedForDerivativesInLiabilityPosition	6000000	USD
CY2014Q3	cma	Commercial Lending Fees CommercialLendingFees	26000000	USD
	cma	Commercial Lending Fees CommercialLendingFees	69000000	USD
CY2015Q3	cma	Commercial Lending Fees CommercialLendingFees	22000000	USD
	cma	Commercial Lending Fees CommercialLendingFees	69000000	USD
CY2014Q4	cma	Deposits Customer Certificates Deposits DepositsCustomerCertificatesDeposits	4421000000	USD
CY2015Q3	cma	Deposits Customer Certificates Deposits DepositsCustomerCertificatesDeposits	4126000000	USD
CY2015Q3	cma	Derivative Assets Cash Collateral DerivativeAssetsCashCollateral	342000000	USD
CY2014Q3	cma	Efficiency Ratio EfficiencyRatio	0.6287
	cma	Efficiency Ratio EfficiencyRatio	0.6399
CY2015Q3	cma	Efficiency Ratio EfficiencyRatio	0.6708
	cma	Efficiency Ratio EfficiencyRatio	0.6641
CY2014Q3	cma	Gain Losson Economic Hedges GainLossonEconomicHedges	an insignificant amount
	cma	Gain Losson Economic Hedges GainLossonEconomicHedges	an insignificant amount
CY2014Q3	cma	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	227000000	USD
	cma	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	651000000	USD
CY2015Q3	cma	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	199000000	USD
	cma	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	593000000	USD
CY2015Q3	cma	Increase In Card Fees Due To Presentation Change IncreaseInCardFeesDueToPresentationChange	48000000	USD
	cma	Increase In Card Fees Due To Presentation Change IncreaseInCardFeesDueToPresentationChange	136000000	USD
CY2015Q3	cma	Increase In Processing Fee Expense Dueto Presentation Change IncreaseInProcessingFeeExpenseDuetoPresentationChange	48000000	USD
	cma	Increase In Processing Fee Expense Dueto Presentation Change IncreaseInProcessingFeeExpenseDuetoPresentationChange	136000000	USD
CY2014Q3	cma	Interest And Dividend Income Securities Afs And Htm InterestAndDividendIncomeSecuritiesAFSAndHTM	52000000	USD
	cma	Interest And Dividend Income Securities Afs And Htm InterestAndDividendIncomeSecuritiesAFSAndHTM	160000000	USD
CY2015Q3	cma	Interest And Dividend Income Securities Afs And Htm InterestAndDividendIncomeSecuritiesAFSAndHTM	54000000	USD
	cma	Interest And Dividend Income Securities Afs And Htm InterestAndDividendIncomeSecuritiesAFSAndHTM	160000000	USD
	cma	Lease Residual Transferred To Other Assets LeaseResidualTransferredToOtherAssets	0	USD
	cma	Lease Residual Transferred To Other Assets LeaseResidualTransferredToOtherAssets	16000000	USD
CY2014Q4	cma	Leases Receivable Commercial Lease Financing Net Of Deferred Income LeasesReceivableCommercialLeaseFinancingNetOfDeferredIncome	805000000	USD
CY2015Q3	cma	Leases Receivable Commercial Lease Financing Net Of Deferred Income LeasesReceivableCommercialLeaseFinancingNetOfDeferredIncome	751000000	USD
CY2014Q3	cma	Letter Of Credit Fees LetterOfCreditFees	14000000	USD
	cma	Letter Of Credit Fees LetterOfCreditFees	43000000	USD
CY2015Q3	cma	Letter Of Credit Fees LetterOfCreditFees	13000000	USD
	cma	Letter Of Credit Fees LetterOfCreditFees	39000000	USD
CY2015Q3	cma	Liabilities Secured By Pledged Securities LiabilitiesSecuredByPledgedSecurities	2100000000	USD
CY2014Q4	cma	Loans And Leases Receivable Consumer Loans Net Of Deferred Income LoansAndLeasesReceivableConsumerLoansNetOfDeferredIncome	2382000000	USD
CY2015Q3	cma	Loans And Leases Receivable Consumer Loans Net Of Deferred Income LoansAndLeasesReceivableConsumerLoansNetOfDeferredIncome	2491000000	USD
CY2014Q4	cma	Loans And Leases Receivable Consumer Mortgage Net Of Deferred Income LoansAndLeasesReceivableConsumerMortgageNetOfDeferredIncome	1831000000	USD
CY2015Q3	cma	Loans And Leases Receivable Consumer Mortgage Net Of Deferred Income LoansAndLeasesReceivableConsumerMortgageNetOfDeferredIncome	1880000000	USD
CY2014Q4	cma	Loans And Leases Receivable Foreign Net Of Deferred Income Other LoansAndLeasesReceivableForeignNetOfDeferredIncomeOther	1496000000	USD
CY2015Q3	cma	Loans And Leases Receivable Foreign Net Of Deferred Income Other LoansAndLeasesReceivableForeignNetOfDeferredIncomeOther	1382000000	USD
CY2014Q4	cma	Loans Receivable Commercial Financial And Agricultural Net Of Deferred Income LoansReceivableCommercialFinancialAndAgriculturalNetOfDeferredIncome	31520000000	USD
CY2015Q3	cma	Loans Receivable Commercial Financial And Agricultural Net Of Deferred Income LoansReceivableCommercialFinancialAndAgriculturalNetOfDeferredIncome	31777000000	USD
CY2014Q4	cma	Loans Receivable Commercial Mortgage Net Of Deferred Income LoansReceivableCommercialMortgageNetOfDeferredIncome	8604000000	USD
CY2015Q3	cma	Loans Receivable Commercial Mortgage Net Of Deferred Income LoansReceivableCommercialMortgageNetOfDeferredIncome	8787000000	USD
	cma	Net Increase In Fixed Assets NetIncreaseInFixedAssets	38000000	USD
	cma	Net Increase In Fixed Assets NetIncreaseInFixedAssets	78000000	USD
CY2014Q4	cma	Net Unrealized Losses On Available For Sale Securities Transferred To Held To Maturity NetUnrealizedLossesOnAvailableForSaleSecuritiesTransferredToHeldToMaturity	23000000	USD
CY2015Q3	cma	Net Unrealized Losses On Available For Sale Securities Transferred To Held To Maturity NetUnrealizedLossesOnAvailableForSaleSecuritiesTransferredToHeldToMaturity	17000000	USD
CY2014Q4	cma	Notional Amount Of Derivative Credit Risk Participation Agreements NotionalAmountOfDerivativeCreditRiskParticipationAgreements	598000000	USD
CY2015Q3	cma	Notional Amount Of Derivative Credit Risk Participation Agreements NotionalAmountOfDerivativeCreditRiskParticipationAgreements	653000000	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 From Aoci For Amortization Of Unrealized Losses On Afs Securities Transferred To Htm Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForAmortizationOfUnrealizedLossesOnAFSSecuritiesTransferredToHTMBeforeTax	0	USD
	cma	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Amortization Of Unrealized Losses On Afs Securities Transferred To Htm Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForAmortizationOfUnrealizedLossesOnAFSSecuritiesTransferredToHTMBeforeTax	-6000000	USD
	cma	Other Comprehensive Income Loss Reclassification Adjustment Pension And Other Postretirement Benefit Plans Recognized In Net Periodic Defined Benefit Cost Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentPensionAndOtherPostretirementBenefitPlansRecognizedInNetPeriodicDefinedBenefitCostBeforeTax	31000000	USD
	cma	Other Comprehensive Income Loss Reclassification Adjustment Pension And Other Postretirement Benefit Plans Recognized In Net Periodic Defined Benefit Cost Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentPensionAndOtherPostretirementBenefitPlansRecognizedInNetPeriodicDefinedBenefitCostBeforeTax	53000000	USD
	cma	Other Comprehensive Income Loss Reclassification Adjustment Pension And Other Postretirement Benefit Plans Recognized In Net Periodic Defined Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationAdjustmentPensionAndOtherPostretirementBenefitPlansRecognizedInNetPeriodicDefinedBenefitCostTax	11000000	USD
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	cma	Other Comprehensive Income Loss Reclassification From Aoci For Amortization Of Yield Adjustment Tax OtherComprehensiveIncomeLossReclassificationFromAOCIForAmortizationOfYieldAdjustmentTax	0	USD
	cma	Other Comprehensive Income Loss Reclassification From Aoci For Amortization Of Yield Adjustment Tax OtherComprehensiveIncomeLossReclassificationFromAOCIForAmortizationOfYieldAdjustmentTax	-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 Net Of Tax OtherComprehensiveincomeLossReclassificationAdjustmentFromAOCIForAmortizationOfUnrealizedGainsLossesOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturityNetOfTax	0	USD
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CY2014Q3	cma	Outside Processing Fee Expense OutsideProcessingFeeExpense	31000000	USD
	cma	Outside Processing Fee Expense OutsideProcessingFeeExpense	89000000	USD
CY2015Q3	cma	Outside Processing Fee Expense OutsideProcessingFeeExpense	86000000	USD
	cma	Outside Processing Fee Expense OutsideProcessingFeeExpense	249000000	USD
CY2014Q4	cma	Real Estate Construction Loans Net Of Deferred Income RealEstateConstructionLoansNetOfDeferredIncome	1955000000	USD
CY2015Q3	cma	Real Estate Construction Loans Net Of Deferred Income RealEstateConstructionLoansNetOfDeferredIncome	1874000000	USD
CY2014Q4	cma	Reduced Rate Loans ReducedRateLoans	17000000	USD
CY2015Q3	cma	Reduced Rate Loans ReducedRateLoans	12000000	USD
CY2014Q3	cma	Return On Average Assets ReturnOnAverageAssets	0.0093
	cma	Return On Average Assets ReturnOnAverageAssets	0.0091
CY2015Q3	cma	Return On Average Assets ReturnOnAverageAssets	0.0076
	cma	Return On Average Assets ReturnOnAverageAssets	0.0078
CY2014Q4	cma	Risk Participations Covering Standby And Commercial Letters Of Credit RiskParticipationsCoveringStandbyAndCommercialLettersOfCredit	316000000	USD
CY2015Q3	cma	Risk Participations Covering Standby And Commercial Letters Of Credit RiskParticipationsCoveringStandbyAndCommercialLettersOfCredit	295000000	USD
CY2014Q3	cma	Segment Reporting Average Assets SegmentReportingAverageAssets	66398000000	USD
	cma	Segment Reporting Average Assets SegmentReportingAverageAssets	65335000000	USD
CY2015Q3	cma	Segment Reporting Average Assets SegmentReportingAverageAssets	71333000000	USD
	cma	Segment Reporting Average Assets SegmentReportingAverageAssets	69688000000	USD
CY2014Q3	cma	Segment Reporting Information Interest Income Expense Net Fte SegmentReportingInformationInterestIncomeExpenseNetFte	415000000	USD
	cma	Segment Reporting Information Interest Income Expense Net Fte SegmentReportingInformationInterestIncomeExpenseNetFte	1243000000	USD
CY2015Q3	cma	Segment Reporting Information Interest Income Expense Net Fte SegmentReportingInformationInterestIncomeExpenseNetFte	423000000	USD
	cma	Segment Reporting Information Interest Income Expense Net Fte SegmentReportingInformationInterestIncomeExpenseNetFte	1259000000	USD
CY2014Q3	cma	Segment Reporting Information Tax Expense Fte SegmentReportingInformationTaxExpenseFte	74000000	USD
	cma	Segment Reporting Information Tax Expense Fte SegmentReportingInformationTaxExpenseFte	210000000	USD
CY2015Q3	cma	Segment Reporting Information Tax Expense Fte SegmentReportingInformationTaxExpenseFte	64000000	USD
	cma	Segment Reporting Information Tax Expense Fte SegmentReportingInformationTaxExpenseFte	191000000	USD
CY2014Q3	cma	Software Expenses SoftwareExpenses	25000000	USD
	cma	Software Expenses SoftwareExpenses	72000000	USD
CY2015Q3	cma	Software Expenses SoftwareExpenses	26000000	USD
	cma	Software Expenses SoftwareExpenses	73000000	USD
	cma	Stock Issued During Period Value Warrants Exercised StockIssuedDuringPeriodValueWarrantsExercised	0	USD
CY2014Q4	cma	Total Internally Classified Watch List Letters Of Credit TotalInternallyClassifiedWatchListLettersOfCredit	79000000	USD
CY2015Q3	cma	Total Internally Classified Watch List Letters Of Credit TotalInternallyClassifiedWatchListLettersOfCredit	104000000	USD
CY2014Q4	cma	Total Nonperforming Assets TotalNonperformingAssets	300000000	USD
CY2015Q3	cma	Total Nonperforming Assets TotalNonperformingAssets	381000000	USD
CY2014Q4	cma	Total Nonperforming Loans TotalNonperformingLoans	290000000	USD
CY2015Q3	cma	Total Nonperforming Loans TotalNonperformingLoans	369000000	USD
CY2014Q4	cma	Watch List Letters Of Credit As Percentage Of Total Letters Of Credit WatchListLettersOfCreditAsPercentageOfTotalLettersOfCredit	0.020
CY2015Q3	cma	Watch List Letters Of Credit As Percentage Of Total Letters Of Credit WatchListLettersOfCreditAsPercentageOfTotalLettersOfCredit	0.026
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2015
	dei	Document Period End Date DocumentPeriodEndDate	2015-09-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000028412
CY2015Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	176734815	shares
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	Comerica INC /NEW/
	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2014Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	21562000000	USD
CY2015Q3	invest	Derivative Notional Amount DerivativeNotionalAmount	21356000000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-9000000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-11000000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-68000000	USD
CY2014Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-14000000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	37000000	USD
CY2015Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	70000000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	323000000	USD
CY2014Q3	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	303000000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	449000000	USD
CY2015Q3	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	415000000	USD
CY2014Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-317000000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-412000000	USD
CY2015Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-345000000	USD
CY2015Q3	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	4000000	USD
CY2014Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2188000000	USD
CY2015Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2165000000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	31000000	USD
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CY2014Q3	us-gaap	Advertising Expense AdvertisingExpense	5000000	USD
	us-gaap	Advertising Expense AdvertisingExpense	16000000	USD
CY2015Q3	us-gaap	Advertising Expense AdvertisingExpense	6000000	USD
	us-gaap	Advertising Expense AdvertisingExpense	17000000	USD
CY2014Q3	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	3000000	USD
	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	24000000	USD
CY2015Q3	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	23000000	USD
	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	49000000	USD
CY2014Q4	us-gaap	Assets Assets	69186000000	USD
CY2015Q3	us-gaap	Assets Assets	71012000000	USD
CY2015Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	8416000000	USD
CY2014Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	8116000000	USD
CY2015Q3	us-gaap	Available For Sale Securities AvailableForSaleSecurities	8749000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	123000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	147000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	42000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	20000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	8035000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	8622000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	73000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	37000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	76000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	41000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	4171000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	2793000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	3000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	4000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	924000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	712000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	3247000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	2081000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	929000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	976000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	1123000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	1136000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	6290000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	6357000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	74000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	74000000	USD
CY2015Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	8543000000	USD
CY2014Q3	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	0	USD
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CY2015Q3	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	0	USD
CY2014Q3	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	1000000	USD
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CY2015Q3	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	0	USD
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CY2015Q3	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	2900000000	USD
CY2015Q3	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	123	Security
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CY2014Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	11000000	USD
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CY2015Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	10000000	USD
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CY2014Q3	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	4000000	USD
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CY2015Q3	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	5000000	USD
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CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6451000000	USD
CY2014Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	7787000000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6071000000	USD
CY2015Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	7200000000	USD
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	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	1129000000	USD
CY2014Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	1026000000	USD
CY2015Q3	us-gaap	Cash And Due From Banks CashAndDueFromBanks	1101000000	USD
CY2013Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	15000000	USD
CY2014Q2	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	6000000	USD
CY2014Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	6000000	USD
CY2014Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	1000000	USD
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CY2015Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	1000000	USD
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CY2014Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	1000000	USD
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CY2015Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	1000000	USD
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CY2014Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Allowance For Loan Losses CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses	0	USD
CY2015Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Allowance For Loan Losses CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses	0	USD
CY2014Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	2000000	USD
CY2015Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	2000000	USD
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CY2015Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance	6000000	USD
CY2014Q3	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1 ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1	18000000	USD
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CY2015Q3	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1 ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1	18000000	USD
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CY2015Q3	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	1000000	USD
CY2014Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.2
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CY2015Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.21
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CY2014Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	5
CY2015Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	5
CY2014Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	325000000	shares
CY2015Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	325000000	shares
CY2014Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	228164824	shares
CY2015Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	228164824	shares
CY2014Q4	us-gaap	Common Stock Value CommonStockValue	1141000000	USD
CY2015Q3	us-gaap	Common Stock Value CommonStockValue	1141000000	USD
CY2014Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	141000000	USD
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CY2015Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	187000000	USD
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CY2014Q4	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	7000000	USD
CY2015Q3	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	12000000	USD
CY2015Q3	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	8000000	USD
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CY2014Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	130000000	USD
CY2015Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	132000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2015Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
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CY2014Q4	us-gaap	Deposits Deposits	57486000000	USD
CY2015Q3	us-gaap	Deposits Deposits	58768000000	USD
CY2014Q4	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	23954000000	USD
CY2015Q3	us-gaap	Deposits Money Market Deposits And Negotiable Order Of Withdrawal Now DepositsMoneyMarketDepositsAndNegotiableOrderOfWithdrawalNOW	23948000000	USD
CY2014Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1752000000	USD
CY2015Q3	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1853000000	USD
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CY2014Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	262000000	USD
CY2015Q3	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	282000000	USD
CY2014Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	133000000	USD
CY2015Q3	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	123000000	USD
CY2015Q3	us-gaap	Derivative Asset Fair Value Of Collateral DerivativeAssetFairValueOfCollateral	143000000	USD
CY2014Q4	us-gaap	Derivative Assets DerivativeAssets	499000000	USD
CY2015Q3	us-gaap	Derivative Assets DerivativeAssets	480000000	USD
CY2014Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	239000000	USD
CY2015Q3	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	141000000	USD
CY2014Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	2000000	USD
CY2015Q3	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	12000000	USD
CY2014Q4	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Assets DerivativeCreditRiskValuationAdjustmentDerivativeAssets	2000000	USD
CY2015Q3	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Assets DerivativeCreditRiskValuationAdjustmentDerivativeAssets	5000000	USD
CY2014Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	894000000	USD
CY2015Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	885000000	USD
CY2014Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	260000000	USD
CY2015Q3	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	339000000	USD
CY2014Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	661000000	USD
CY2015Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	640000000	USD
CY2014Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	526000000	USD
CY2015Q3	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	499000000	USD
CY2014Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	528000000	USD
CY2015Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	511000000	USD
CY2014Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	0	USD
CY2015Q3	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	6000000	USD
CY2014Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	133000000	USD
CY2015Q3	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	123000000	USD
CY2015Q3	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	12000000	USD
CY2015Q3	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	5000000	USD
CY2014Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	36000000	USD
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CY2015Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	37000000	USD
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CY2014Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
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CY2015Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.76
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CY2014Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.82
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CY2015Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.74
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CY2014Q3	us-gaap	Equipment Expense EquipmentExpense	14000000	USD
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CY2015Q3	us-gaap	Equipment Expense EquipmentExpense	14000000	USD
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CY2014Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	9000000	USD
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	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	27000000	USD
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CY2014Q3	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	44000000	USD
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CY2015Q3	us-gaap	Fees And Commissions Fiduciary And Trust Activities FeesAndCommissionsFiduciaryAndTrustActivities	47000000	USD
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CY2014Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	9000000	USD
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CY2014Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	48152000000	USD
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CY2014Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	168000000	USD
CY2015Q3	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	162000000	USD
CY2014Q4	us-gaap	Foreclosed Assets ForeclosedAssets	10000000	USD
CY2015Q3	us-gaap	Foreclosed Assets ForeclosedAssets	12000000	USD
CY2014Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	9000000	USD
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	30000000	USD
CY2015Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	10000000	USD
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	29000000	USD
CY2014Q3	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
CY2015Q3	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	1000000	USD
CY2015Q3	us-gaap	Gain Loss On Foreign Currency Fair Value Hedge Derivatives GainLossOnForeignCurrencyFairValueHedgeDerivatives	1000000	USD
	us-gaap	Gain Loss On Foreign Currency Fair Value Hedge Derivatives GainLossOnForeignCurrencyFairValueHedgeDerivatives	1000000	USD
CY2014Q3	us-gaap	Gain Loss On Interest Rate Fair Value Hedge Ineffectiveness GainLossOnInterestRateFairValueHedgeIneffectiveness	-1000000	USD
	us-gaap	Gain Loss On Interest Rate Fair Value Hedge Ineffectiveness GainLossOnInterestRateFairValueHedgeIneffectiveness	-1000000	USD
CY2015Q3	us-gaap	Gain Loss On Interest Rate Fair Value Hedge Ineffectiveness GainLossOnInterestRateFairValueHedgeIneffectiveness	3000000	USD
	us-gaap	Gain Loss On Interest Rate Fair Value Hedge Ineffectiveness GainLossOnInterestRateFairValueHedgeIneffectiveness	2000000	USD
	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	3000000	USD
	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	2000000	USD
CY2014Q3	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	-1000000	USD
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	0	USD
CY2015Q3	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	0	USD
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	-2000000	USD
CY2014Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	32000000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	32000000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2015Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2014Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1935000000	USD
CY2015Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1863000000	USD
CY2015Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	0	USD
CY2015Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	0	USD
CY2015Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	0	USD
CY2015Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	0	USD
CY2015Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	1872000000	USD
CY2015Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	1863000000	USD
CY2015Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	0	USD
CY2015Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	0	USD
CY2015Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	1872000000	USD
CY2014Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	254000000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	259000000	USD
CY2015Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	340000000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	276000000	USD
CY2014Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	1000000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	3000000	USD
CY2015Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	2000000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	4000000	USD
CY2014Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	219000000	USD
CY2015Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	389000000	USD
CY2014Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	39000000	USD
CY2015Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	47000000	USD
CY2014Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	304000000	USD
CY2015Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	494000000	USD
CY2014Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	53000000	USD
CY2015Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	124000000	USD
CY2014Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	166000000	USD
CY2015Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	265000000	USD
CY2014Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	73000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	207000000	USD
CY2015Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	63000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	188000000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	154000000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	46000000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-44000000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-70000000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	4205000000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1361000000	USD
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	2000000	USD
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	9000000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-39000000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-147000000	USD
	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-1000000	USD
	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	0	USD
CY2014Q3	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	4000000	shares
	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	5000000	shares
CY2015Q3	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	3000000	shares
	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	4000000	shares
CY2014Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2000000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2000000	shares
CY2015Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2000000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2000000	shares
CY2014Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	436000000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	1312000000	USD
CY2015Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	448000000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	1327000000	USD
CY2014Q3	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	381000000	USD
	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	1142000000	USD
CY2015Q3	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	390000000	USD
	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	1156000000	USD
CY2014Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	30262000000	USD
CY2015Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	30071000000	USD
CY2014Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	5045000000	USD
CY2015Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	6099000000	USD
CY2014Q4	us-gaap	Interest Bearing Foreign Deposit Time Deposits InterestBearingForeignDepositTimeDeposits	135000000	USD
CY2015Q3	us-gaap	Interest Bearing Foreign Deposit Time Deposits InterestBearingForeignDepositTimeDeposits	144000000	USD
CY2014Q3	us-gaap	Interest Expense InterestExpense	22000000	USD
	us-gaap	Interest Expense InterestExpense	72000000	USD
CY2015Q3	us-gaap	Interest Expense InterestExpense	26000000	USD
	us-gaap	Interest Expense InterestExpense	71000000	USD
CY2014Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	11000000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	33000000	USD
CY2015Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	11000000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	33000000	USD
CY2014Q3	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	11000000	USD
	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	39000000	USD
CY2015Q3	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	15000000	USD
	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	38000000	USD
CY2014Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	409000000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	1215000000	USD
CY2015Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	396000000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	1169000000	USD
CY2014Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	414000000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1240000000	USD
CY2015Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	422000000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1256000000	USD
	us-gaap	Interest Paid InterestPaid	74000000	USD
	us-gaap	Interest Paid InterestPaid	64000000	USD
CY2014Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	248000000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	735000000	USD
CY2015Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	243000000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	747000000	USD
CY2014Q3	us-gaap	Legal Fees LegalFees	8000000	USD
	us-gaap	Legal Fees LegalFees	18000000	USD
CY2015Q3	us-gaap	Legal Fees LegalFees	5000000	USD
	us-gaap	Legal Fees LegalFees	15000000	USD
CY2014Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	4000000000	USD
CY2015Q3	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	4100000000	USD
CY2014Q4	us-gaap	Liabilities Liabilities	61784000000	USD
CY2015Q3	us-gaap	Liabilities Liabilities	63390000000	USD
CY2014Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	69186000000	USD
CY2015Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	71012000000	USD
CY2014Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	594000000	USD
CY2015Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	622000000	USD
CY2014Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	3000000	USD
CY2015Q3	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	1000000	USD
CY2014Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	273000000	USD
CY2015Q3	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	357000000	USD
CY2014Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	48593000000	USD
CY2015Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	48942000000	USD
CY2014Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	47999000000	USD
CY2015Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	48320000000	USD
CY2014Q4	us-gaap	Long Term Debt LongTermDebt	2675000000	USD
CY2015Q3	us-gaap	Long Term Debt LongTermDebt	3100000000	USD
CY2014Q3	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	-2000000	USD
	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	4000000	USD
CY2015Q3	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	-3000000	USD
	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	-32000000	USD
CY2015Q3	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	1000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	3098000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1489000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2327000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1023000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	565000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	663000000	USD
CY2014Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	152000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	438000000	USD
CY2015Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	134000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	400000000	USD
CY2014Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	27224000000	USD
CY2015Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	28697000000	USD
CY2014Q3	us-gaap	Noninterest Expense NoninterestExpense	397000000	USD
	us-gaap	Noninterest Expense NoninterestExpense	1207000000	USD
CY2015Q3	us-gaap	Noninterest Expense NoninterestExpense	461000000	USD
	us-gaap	Noninterest Expense NoninterestExpense	1356000000	USD
CY2014Q3	us-gaap	Noninterest Income NoninterestIncome	215000000	USD
	us-gaap	Noninterest Income NoninterestIncome	643000000	USD
CY2015Q3	us-gaap	Noninterest Income NoninterestIncome	264000000	USD
	us-gaap	Noninterest Income NoninterestIncome	780000000	USD
CY2014Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	31000000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	94000000	USD
CY2015Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	26000000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	80000000	USD
CY2014Q3	us-gaap	Occupancy Net OccupancyNet	46000000	USD
	us-gaap	Occupancy Net OccupancyNet	125000000	USD
CY2015Q3	us-gaap	Occupancy Net OccupancyNet	41000000	USD
	us-gaap	Occupancy Net OccupancyNet	118000000	USD
CY2014Q4	us-gaap	Other Assets OtherAssets	4434000000	USD
CY2015Q3	us-gaap	Other Assets OtherAssets	4232000000	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	1000000	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	0	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	54000000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	33000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	74000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	67000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	20000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	34000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-2000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	1000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-1000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-1000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-30000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-53000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	85000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	44000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	55000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	28000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	30000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	16000000	USD
CY2014Q3	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	3000000	USD
	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	10000000	USD
CY2015Q3	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	4000000	USD
	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	11000000	USD
CY2014Q4	us-gaap	Other Liabilities OtherLiabilities	1507000000	USD
CY2015Q3	us-gaap	Other Liabilities OtherLiabilities	1413000000	USD
CY2014Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	53000000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	130000000	USD
CY2015Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	39000000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	117000000	USD
CY2014Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	99000000	USD
CY2015Q3	us-gaap	Other Short Term Investments OtherShortTermInvestments	107000000	USD
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-41000000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	2254000000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	436000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	4000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-5000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	200000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	175000000	USD
	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	0	USD
	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	10000000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	101000000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	109000000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1413000000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1933000000	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	166000000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	45000000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	21000000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	596000000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1016000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1328000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1282000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	0	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	244000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	4000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-5000000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-51000000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-7000000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	0	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	51000000	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	13000000	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	8000000	USD
CY2014Q3	us-gaap	Profit Loss ProfitLoss	154000000	USD
	us-gaap	Profit Loss ProfitLoss	444000000	USD
CY2015Q3	us-gaap	Profit Loss ProfitLoss	136000000	USD
	us-gaap	Profit Loss ProfitLoss	405000000	USD
CY2014Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	532000000	USD
CY2015Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	541000000	USD
CY2014Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	5000000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	25000000	USD
CY2015Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	26000000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	87000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1406000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	606000000	USD
CY2014Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	6744000000	USD
CY2015Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	7007000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	31000000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	29000000	USD
CY2014Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	116000000	USD
CY2015Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	109000000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	41000000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	14000000	USD
CY2013Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7150000000	USD
CY2014Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7433000000	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7402000000	USD
CY2015Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7622000000	USD
	us-gaap	Stockholders Equity Other StockholdersEquityOther	0	USD
	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	0	USD
	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	19000000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	13000000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	9000000	USD
CY2014Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	49146225	shares
CY2015Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	51010418	shares
CY2014Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2259000000	USD
CY2015Q3	us-gaap	Treasury Stock Value TreasuryStockValue	2346000000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	200000000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	175000000	USD
CY2014Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	2000000	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	6000000	USD
CY2015Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	2000000	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	5000000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	14000000	USD
CY2015Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22000000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	2000000	USD
CY2015Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	3000000	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
CY2015Q3	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	126000000	USD
CY2014Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	185000000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	186000000	shares
CY2015Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	181000000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	182000000	shares
CY2014Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	179000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	179000000	shares
CY2015Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	176000000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	176000000	shares

Files In Submission

Name	View Source	Status
0000028412-15-000127-index-headers.html	Edgar Link	pending
0000028412-15-000127-index.html	Edgar Link	pending
0000028412-15-000127.txt	Edgar Link	pending
0000028412-15-000127-xbrl.zip	Edgar Link	pending
a2015q310q.htm	Edgar Link	pending
a2015q310q_ex311.htm	Edgar Link	pending
a2015q310q_ex312.htm	Edgar Link	pending
a2015q310q_ex32.htm	Edgar Link	pending
cma-20150930.xml	Edgar Link	completed
cma-20150930.xsd	Edgar Link	pending
cma-20150930_cal.xml	Edgar Link	unprocessable
cma-20150930_def.xml	Edgar Link	unprocessable
cma-20150930_lab.xml	Edgar Link	unprocessable
cma-20150930_pre.xml	Edgar Link	unprocessable
exhibit101.htm	Edgar Link	pending
exhibit102.htm	Edgar Link	pending
exhibit41.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$CMA
COMERICA INC /NEW/ Stock $cma

2015 Q4 Form 10-Q Financial Statement

#000002841215000127 Filed on October 29, 2015

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CMA COMERICA INC /NEW/ Stock $cma

2015 Q4 Form 10-Q Financial Statement

#000002841215000127 Filed on October 29, 2015

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CMA
COMERICA INC /NEW/ Stock $cma