$CBSH
COMMERCE BANCSHARES INC /MO/ Stock $cbsh

$cbsh Overview Financials Valuation SEC Filings Company Website

2022 Q3 Form 10-Q Financial Statement

#000002235622000044 Filed on August 05, 2022

Income Statement

Concept	2022 Q3	2022 Q2	2021 Q4
Revenue	$0.00	$0.00
YoY Change
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	$11.71M	$11.83M	$11.30M
YoY Change	5.51%	6.55%	0.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$16.29M	$5.769M
YoY Change	453.43%	83.08%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$160.1M	$152.2M	$149.1M
YoY Change	-0.18%	-28.04%	-9.8%
Income Tax	$33.94M	$32.02M	$33.80M
% Of Pretax Income	21.19%	21.04%	22.67%
Net Earnings	$122.8M	$115.8M	$114.9M
YoY Change	0.21%	-28.67%	-11.55%
Net Earnings / Revenue
Basic Earnings Per Share	$1.03	$0.96
Diluted Earnings Per Share	$1.02	$0.96	$948.0K
COMMON SHARES
Basic Shares Outstanding	119.9M shares	120.7M shares	116.2M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2022 Q3	2022 Q2	2021 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$1.009B	$1.072B	$4.297B
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	$407.8M	$397.9M	$388.7M
YoY Change	8.04%	6.96%	4.76%
Goodwill	$138.9M	$138.9M	$138.9M
YoY Change	0.0%	0.0%	0.0%
Intangibles	$15.60M	$15.85M	$15.57M
YoY Change	7.89%	12.05%	38.93%
Long-Term Investments	$1.434M	$1.434M	$1.834M
YoY Change	-21.81%	-90.94%	-89.81%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$32.60B	$33.44B	$36.69B
YoY Change	-5.49%	-1.24%	11.44%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$2.315B	$2.234B	$3.023B
YoY Change	2.69%	-3.61%	44.09%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$2.315B	$2.234B	$3.023B
YoY Change	2.69%	-3.61%	44.09%
LONG-TERM LIABILITIES
Long-Term Debt	$1.831M	$6.025M	$13.00M
YoY Change	-54.23%	201.25%	1200.0%
Other Long-Term Liabilities	$443.8M	$348.5M	$392.0M
YoY Change	-26.29%	-37.32%	-17.82%
Total Long-Term Liabilities	$445.6M	$354.5M	$405.0M
YoY Change	-26.47%	-36.46%	-15.27%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.315B	$2.234B	$3.023B
Total Long-Term Liabilities	$445.6M	$354.5M	$405.0M
Total Liabilities	$30.23B	$30.76B	$33.24B
YoY Change	-2.5%	1.31%	12.59%
SHAREHOLDERS EQUITY
Retained Earnings	$353.4M	$262.4M	$92.49M
YoY Change	-10.89%	-13.91%	26.7%
Common Stock	$610.8M	$610.8M	$610.8M
YoY Change	3.64%	3.64%	3.64%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$176.9M	$129.6M	$32.97M
YoY Change	92.23%	144.42%	0.01%
Treasury Stock Shares	2.553M shares	1.882M shares	476.4K shares
Shareholders Equity	$2.352B	$2.659B	$3.437B
YoY Change
Total Liabilities & Shareholders Equity	$32.60B	$33.44B	$36.69B
YoY Change	-5.49%	-1.24%	11.44%

Cashflow Statement

Concept	2022 Q3	2022 Q2	2021 Q4
OPERATING ACTIVITIES
Net Income	$122.8M	$115.8M	$114.9M
YoY Change	0.21%	-28.67%	-11.55%
Depreciation, Depletion And Amortization	$11.71M	$11.83M	$11.30M
YoY Change	5.51%	6.55%	0.0%
Cash From Operating Activities	$183.6M	$161.7M	$111.6M
YoY Change	15.55%	28.81%	-26.39%
INVESTING ACTIVITIES
Capital Expenditures	-$17.65M	-$13.39M	-$19.30M
YoY Change	13.88%	19.54%	394.87%
Acquisitions
YoY Change
Other Investing Activities	$569.9M	$721.6M	-$434.6M
YoY Change	-162.14%	-302.02%	-53.94%
Cash From Investing Activities	$552.3M	$708.2M	-$454.0M
YoY Change	-159.22%	-292.2%	-52.09%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-798.7M	-1.404B	2.388B
YoY Change	-266.75%	-443.76%	65.04%
NET CHANGE
Cash From Operating Activities	183.6M	161.7M	111.6M
Cash From Investing Activities	552.3M	708.2M	-454.0M
Cash From Financing Activities	-798.7M	-1.404B	2.388B
Net Change In Cash	-62.84M	-533.7M	2.045B
YoY Change	-78.68%	-422.85%	214.29%
FREE CASH FLOW
Cash From Operating Activities	$183.6M	$161.7M	$111.6M
Capital Expenditures	-$17.65M	-$13.39M	-$19.30M
Free Cash Flow	$201.3M	$175.0M	$130.9M
YoY Change	15.4%	28.05%	-15.82%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Central Index Key EntityCentralIndexKey	0000022356
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	City Area Code CityAreaCode	816
	dei	Local Phone Number LocalPhoneNumber	234-2000
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Amendment Flag AmendmentFlag	false
CY2022Q2	cbsh	Capitalized Interest Or Dividends CapitalizedInterestOrDividends	0	usd
	cbsh	Capitalized Interest Or Dividends CapitalizedInterestOrDividends	0	usd
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2022-06-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-36502
	dei	Entity Registrant Name EntityRegistrantName	COMMERCE BANCSHARES, INC.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MO
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	43-0889454
	dei	Entity Address Address Line1 EntityAddressAddressLine1	1000 Walnut
	dei	Entity Address City Or Town EntityAddressCityOrTown	Kansas City,
	dei	Entity Address State Or Province EntityAddressStateOrProvince	MO
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	64106
	dei	Security12b Title Security12bTitle	$5 Par Value Common Stock
	dei	Trading Symbol TradingSymbol	CBSH
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2022Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	119882772	shares
CY2022Q2	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	15686627000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	15176359000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	138039000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	150044000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	15548588000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	15026315000	usd
CY2022Q2	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	1036000	usd
CY2022Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	14783369000	usd
CY2021Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	5570000	usd
CY2022Q2	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	6467000	usd
CY2021Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	8615000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	14419133000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	13700308000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	14450027000	usd
CY2022Q2	us-gaap	Trading Securities TradingSecurities	34195000	usd
CY2021Q4	us-gaap	Trading Securities TradingSecurities	46235000	usd
CY2022Q2	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	8546000	usd
CY2021Q4	us-gaap	Equity Securities Fv Ni And Without Readily Determinable Fair Value EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue	9202000	usd
CY2022Q2	cbsh	Other Securities OtherSecurities	207989000	usd
CY2021Q4	cbsh	Other Securities OtherSecurities	194047000	usd
CY2022Q2	cbsh	Total Investment Securities TotalInvestmentSecurities	13951038000	usd
CY2021Q4	cbsh	Total Investment Securities TotalInvestmentSecurities	14699511000	usd
CY2022Q2	us-gaap	Federal Funds Sold And Securities Purchased Under Agreements To Resell FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	26000000	usd
CY2021Q4	us-gaap	Federal Funds Sold And Securities Purchased Under Agreements To Resell FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	2800000	usd
CY2022Q2	cbsh	Long Term Securities Purchased Under Agreements To Resell LongTermSecuritiesPurchasedUnderAgreementsToResell	1450000000	usd
CY2021Q4	cbsh	Long Term Securities Purchased Under Agreements To Resell LongTermSecuritiesPurchasedUnderAgreementsToResell	1625000000	usd
CY2022Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	684994000	usd
CY2021Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	3971217000	usd
CY2022Q2	us-gaap	Cash And Due From Banks CashAndDueFromBanks	355524000	usd
CY2021Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	305539000	usd
CY2022Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	397877000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	388738000	usd
CY2022Q2	us-gaap	Goodwill Goodwill	138921000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	138921000	usd
CY2022Q2	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	15853000	usd
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	15570000	usd
CY2022Q2	us-gaap	Other Assets OtherAssets	860108000	usd
CY2021Q4	us-gaap	Other Assets OtherAssets	506862000	usd
CY2022Q2	us-gaap	Assets Assets	33435370000	usd
CY2021Q4	us-gaap	Assets Assets	36689088000	usd
CY2022Q2	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	11102585000	usd
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	11772374000	usd
CY2022Q2	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	16063064000	usd
CY2021Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	16598085000	usd
CY2022Q2	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	404096000	usd
CY2021Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	435960000	usd
CY2022Q2	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	601488000	usd
CY2021Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	1006654000	usd
CY2022Q2	us-gaap	Deposits Deposits	28171233000	usd
CY2021Q4	us-gaap	Deposits Deposits	29813073000	usd
CY2022Q2	us-gaap	Federal Funds Purchased And Securities Sold Under Agreements To Repurchase FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	2234296000	usd
CY2021Q4	us-gaap	Federal Funds Purchased And Securities Sold Under Agreements To Repurchase FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	3022967000	usd
CY2022Q2	us-gaap	Other Borrowings OtherBorrowings	6025000	usd
CY2021Q4	us-gaap	Other Borrowings OtherBorrowings	12560000	usd
CY2022Q2	us-gaap	Other Liabilities OtherLiabilities	348503000	usd
CY2021Q4	us-gaap	Other Liabilities OtherLiabilities	392164000	usd
CY2022Q2	us-gaap	Liabilities Liabilities	30760057000	usd
CY2021Q4	us-gaap	Liabilities Liabilities	33240764000	usd
CY2022Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	5
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	5
CY2022Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	140000000	shares
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	140000000	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	122160705	shares
CY2022Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	122160705	shares
CY2022Q2	us-gaap	Common Stock Value CommonStockValue	610804000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	610804000	usd
CY2022Q2	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2682161000	usd
CY2021Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2689894000	usd
CY2022Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	262363000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	92493000	usd
CY2022Q2	us-gaap	Treasury Stock Shares TreasuryStockShares	1881806	shares
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	476392	shares
CY2022Q2	us-gaap	Treasury Stock Value TreasuryStockValue	129588000	usd
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	32973000	usd
CY2022Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-766894000	usd
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	77080000	usd
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	2658846000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	3437298000	usd
CY2022Q2	us-gaap	Minority Interest MinorityInterest	16467000	usd
CY2021Q4	us-gaap	Minority Interest MinorityInterest	11026000	usd
CY2022Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2675313000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3448324000	usd
CY2022Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	33435370000	usd
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	36689088000	usd
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	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	274601000	usd
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CY2022Q2	us-gaap	Interest And Fee Income Loans And Leases Held For Sale InterestAndFeeIncomeLoansAndLeasesHeldForSale	161000	usd
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	us-gaap	Interest And Fee Income Loans And Leases Held For Sale InterestAndFeeIncomeLoansAndLeasesHeldForSale	311000	usd
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	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	161740000	usd
	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	106700000	usd
CY2022Q2	us-gaap	Interest Income Federal Funds Sold And Securities Purchased Under Agreements To Resell InterestIncomeFederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	19000	usd
CY2021Q2	us-gaap	Interest Income Federal Funds Sold And Securities Purchased Under Agreements To Resell InterestIncomeFederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	2000	usd
	us-gaap	Interest Income Federal Funds Sold And Securities Purchased Under Agreements To Resell InterestIncomeFederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	20000	usd
	us-gaap	Interest Income Federal Funds Sold And Securities Purchased Under Agreements To Resell InterestIncomeFederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	2000	usd
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	cbsh	Interest On Long Term Securities Purchased Under Agreements To Resell InterestOnLongTermSecuritiesPurchasedUnderAgreementsToResell	9685000	usd
	cbsh	Interest On Long Term Securities Purchased Under Agreements To Resell InterestOnLongTermSecuritiesPurchasedUnderAgreementsToResell	21544000	usd
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	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	3579000	usd
	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	1113000	usd
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	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	449936000	usd
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	420830000	usd
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	us-gaap	Interest Expense Now Accounts Money Market Accounts And Savings Deposits InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDeposits	4038000	usd
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CY2022Q2	us-gaap	Interest Expense Time Deposits Less Than100000 InterestExpenseTimeDepositsLessThan100000	205000	usd
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	us-gaap	Interest Expense Time Deposits Less Than100000 InterestExpenseTimeDepositsLessThan100000	344000	usd
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CY2022Q2	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	470000	usd
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	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	897000	usd
	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	1723000	usd
CY2022Q2	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	2926000	usd
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	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	3615000	usd
	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	632000	usd
CY2022Q2	cbsh	Interest On Other Borrowings InterestOnOtherBorrowings	-110000	usd
CY2021Q2	cbsh	Interest On Other Borrowings InterestOnOtherBorrowings	-1000	usd
	cbsh	Interest On Other Borrowings InterestOnOtherBorrowings	-129000	usd
	cbsh	Interest On Other Borrowings InterestOnOtherBorrowings	-2000	usd
CY2022Q2	us-gaap	Interest Expense InterestExpense	5769000	usd
CY2021Q2	us-gaap	Interest Expense InterestExpense	3151000	usd
	us-gaap	Interest Expense InterestExpense	8765000	usd
	us-gaap	Interest Expense InterestExpense	7100000	usd
CY2022Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	232385000	usd
CY2021Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	207982000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	441171000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	413730000	usd
CY2022Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	7162000	usd
CY2021Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-45655000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-2696000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-51887000	usd
CY2022Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	225223000	usd
CY2021Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	253637000	usd
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	443867000	usd
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	465617000	usd
CY2022Q2	cbsh	Bank Card Transaction Fees BankCardTransactionFees	43873000	usd
CY2021Q2	cbsh	Bank Card Transaction Fees BankCardTransactionFees	42608000	usd
	cbsh	Bank Card Transaction Fees BankCardTransactionFees	85918000	usd
	cbsh	Bank Card Transaction Fees BankCardTransactionFees	80303000	usd
CY2022Q2	cbsh	Loan Fees And Sales LoanFeesAndSales	3246000	usd
CY2021Q2	cbsh	Loan Fees And Sales LoanFeesAndSales	7446000	usd
	cbsh	Loan Fees And Sales LoanFeesAndSales	7481000	usd
CY2022Q2	cbsh	Trustfeerevenue Trustfeerevenue	46792000	usd
CY2021Q2	cbsh	Trustfeerevenue Trustfeerevenue	46257000	usd
	cbsh	Trustfeerevenue Trustfeerevenue	94603000	usd
	cbsh	Trustfeerevenue Trustfeerevenue	90384000	usd
CY2022Q2	cbsh	Depositfeerevenue Depositfeerevenue	25564000	usd
CY2021Q2	cbsh	Depositfeerevenue Depositfeerevenue	23988000	usd
	cbsh	Depositfeerevenue Depositfeerevenue	47871000	usd
	cbsh	Depositfeerevenue Depositfeerevenue	46563000	usd
CY2022Q2	us-gaap	Noninterest Income Other NoninterestIncomeOther	3327000	usd
CY2021Q2	us-gaap	Noninterest Income Other NoninterestIncomeOther	3327000	usd
	us-gaap	Noninterest Income Other NoninterestIncomeOther	7452000	usd
	us-gaap	Noninterest Income Other NoninterestIncomeOther	8308000	usd
CY2022Q2	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	5068000	usd
CY2021Q2	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	4503000	usd
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	9514000	usd
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	8584000	usd
	cbsh	Loan Fees And Sales LoanFeesAndSales	17630000	usd
CY2022Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	11557000	usd
CY2021Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	11014000	usd
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	18357000	usd
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	23416000	usd
CY2022Q2	us-gaap	Noninterest Income NoninterestIncome	139427000	usd
CY2021Q2	us-gaap	Noninterest Income NoninterestIncome	139143000	usd
	us-gaap	Noninterest Income NoninterestIncome	271196000	usd
	us-gaap	Noninterest Income NoninterestIncome	275188000	usd
CY2022Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	1029000	usd
CY2021Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	16804000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	8192000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	26657000	usd
CY2022Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	142243000	usd
CY2021Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	130751000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	278196000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	259784000	usd
CY2022Q2	us-gaap	Occupancy Net OccupancyNet	12503000	usd
CY2021Q2	us-gaap	Occupancy Net OccupancyNet	11527000	usd
	us-gaap	Occupancy Net OccupancyNet	24799000	usd
	us-gaap	Occupancy Net OccupancyNet	23548000	usd
CY2022Q2	us-gaap	Equipment Expense EquipmentExpense	4734000	usd
CY2021Q2	us-gaap	Equipment Expense EquipmentExpense	4605000	usd
	us-gaap	Equipment Expense EquipmentExpense	9302000	usd
	us-gaap	Equipment Expense EquipmentExpense	8958000	usd
CY2022Q2	cbsh	Supplies Postage And Communication SuppliesPostageAndCommunication	4361000	usd
CY2021Q2	cbsh	Supplies Postage And Communication SuppliesPostageAndCommunication	4033000	usd
	cbsh	Supplies Postage And Communication SuppliesPostageAndCommunication	9074000	usd
	cbsh	Supplies Postage And Communication SuppliesPostageAndCommunication	8158000	usd
CY2022Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	27635000	usd
CY2021Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	24954000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	54651000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	50417000	usd
CY2022Q2	us-gaap	Marketing Expense MarketingExpense	5836000	usd
CY2021Q2	us-gaap	Marketing Expense MarketingExpense	5680000	usd
	us-gaap	Marketing Expense MarketingExpense	12180000	usd
	us-gaap	Marketing Expense MarketingExpense	10838000	usd
CY2022Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	16193000	usd
CY2021Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	16576000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	30951000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	28996000	usd
CY2022Q2	us-gaap	Noninterest Expense NoninterestExpense	213505000	usd
CY2021Q2	us-gaap	Noninterest Expense NoninterestExpense	198126000	usd
	us-gaap	Noninterest Expense NoninterestExpense	419153000	usd
	us-gaap	Noninterest Expense NoninterestExpense	390699000	usd
CY2022Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	152174000	usd
CY2021Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	211458000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	304102000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	376763000	usd
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.96
CY2022Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	32021000	usd
CY2021Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	45209000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	63923000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	77285000	usd
CY2022Q2	us-gaap	Profit Loss ProfitLoss	120153000	usd
CY2021Q2	us-gaap	Profit Loss ProfitLoss	166249000	usd
	us-gaap	Profit Loss ProfitLoss	240179000	usd
	us-gaap	Profit Loss ProfitLoss	299478000	usd
CY2022Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	4359000	usd
CY2021Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3923000	usd
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	6231000	usd
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	6180000	usd
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	115794000	usd
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	162326000	usd
	us-gaap	Net Income Loss NetIncomeLoss	233948000	usd
	us-gaap	Net Income Loss NetIncomeLoss	293298000	usd
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.32
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.93
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.38
CY2022Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.96
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.32
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.93
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.38
CY2022Q2	us-gaap	Profit Loss ProfitLoss	120153000	usd
CY2021Q2	us-gaap	Profit Loss ProfitLoss	166249000	usd
	us-gaap	Profit Loss ProfitLoss	240179000	usd
	us-gaap	Profit Loss ProfitLoss	299478000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-328201000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	55725000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-835466000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-102951000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-322000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-438000	usd
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-645000	usd
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-875000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-4615000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-4525000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-9153000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-8911000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-332494000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	51638000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-843974000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-110987000	usd
CY2022Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-212341000	usd
CY2021Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	217887000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-603795000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	188491000	usd
CY2022Q2	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	4359000	usd
CY2021Q2	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	3923000	usd
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	6231000	usd
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	6180000	usd
CY2022Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-216700000	usd
CY2021Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	213964000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-610026000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	182311000	usd
CY2022Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2973402000	usd
CY2022Q2	us-gaap	Profit Loss ProfitLoss	120153000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-332494000	usd
CY2022Q2	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	654000	usd
CY2022Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	57350000	usd
CY2022Q2	cbsh	Stock Issued During Period Rs As And Sa Rs StockIssuedDuringPeriodRSAsAndSARs	0	usd
CY2022Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4191000	usd
CY2022Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.265
CY2022Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	31935000	usd
CY2022Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2675313000	usd
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3317385000	usd
CY2021Q2	us-gaap	Profit Loss ProfitLoss	166249000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	51638000	usd
CY2021Q2	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	508000	usd
CY2021Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	13964000	usd
CY2021Q2	cbsh	Stock Issued During Period Rs As And Sa Rs StockIssuedDuringPeriodRSAsAndSARs	0	usd
CY2021Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3790000	usd
CY2021Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.250
CY2021Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	30760000	usd
CY2021Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3493830000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3448324000	usd
	us-gaap	Profit Loss ProfitLoss	240179000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-843974000	usd
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	790000	usd
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	113205000	usd
	cbsh	Stock Issued During Period Rs As And Sa Rs StockIssuedDuringPeriodRSAsAndSARs	-448000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8409000	usd
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.530
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	64078000	usd
CY2022Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2675313000	usd
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3399972000	usd
	us-gaap	Profit Loss ProfitLoss	299478000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-110987000	usd
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	895000	usd
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	39887000	usd
	cbsh	Stock Issued During Period Rs As And Sa Rs StockIssuedDuringPeriodRSAsAndSARs	15000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	7723000	usd
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.500
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	61559000	usd
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	356559000	usd
	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-870000	usd
CY2021Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3493830000	usd
	us-gaap	Profit Loss ProfitLoss	240179000	usd
	us-gaap	Profit Loss ProfitLoss	299478000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-2696000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-51887000	usd
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	23638000	usd
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	22525000	usd
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-5946000	usd
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-41270000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	8192000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	26657000	usd
	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	1944000	usd
	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	13677000	usd
	cbsh	Origination Of Loans Held For Sale OriginationOfLoansHeldForSale	93439000	usd
	cbsh	Origination Of Loans Held For Sale OriginationOfLoansHeldForSale	325714000	usd
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	96282000	usd
	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-1287000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	8409000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	7723000	usd
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	11739000	usd
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	-6688000	usd
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	247000	usd
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-2809000	usd
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-1855000	usd
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	19095000	usd
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-30464000	usd
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	6632000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	286170000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	327249000	usd
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	400000	usd
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	usd
	cbsh	Cash Proceeds From Sales Of Investment Securities CashProceedsFromSalesOfInvestmentSecurities	3712000	usd
	cbsh	Cash Proceeds From Sales Of Investment Securities CashProceedsFromSalesOfInvestmentSecurities	10060000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1462151000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1789405000	usd
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	1894221000	usd
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	2707024000	usd
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	518899000	usd
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-678554000	usd
	us-gaap	Payments For Securities Purchased Under Agreements To Resell PaymentsForSecuritiesPurchasedUnderAgreementsToResell	200000000	usd
	us-gaap	Payments For Securities Purchased Under Agreements To Resell PaymentsForSecuritiesPurchasedUnderAgreementsToResell	450000000	usd
	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	375000000	usd
	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	0	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	28985000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	21944000	usd
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1401000	usd
CY2022Q2	us-gaap	Other Foreclosed Assets OtherForeclosedAssets	1100000	usd
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	4786000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-799441000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-696163000	usd
	cbsh	Net Increase Decrease Non Interest Bearing Savings Interest Checking And Money Market Deposits NetIncreaseDecreaseNonInterestBearingSavingsInterestCheckingAndMoneyMarketDeposits	-1302692000	usd
	cbsh	Net Increase Decrease Non Interest Bearing Savings Interest Checking And Money Market Deposits NetIncreaseDecreaseNonInterestBearingSavingsInterestCheckingAndMoneyMarketDeposits	685582000	usd
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-437030000	usd
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-98436000	usd
	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	-788671000	usd
	us-gaap	Increase Decrease In Federal Funds Purchased And Securities Sold Under Agreements To Repurchase Net IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet	219845000	usd
	cbsh	Net Increase Decrease In Short Term Borrowings NetIncreaseDecreaseInShortTermBorrowings	-6535000	usd
	cbsh	Net Increase Decrease In Short Term Borrowings NetIncreaseDecreaseInShortTermBorrowings	1392000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	113205000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	39887000	usd
	cbsh	Paymentsforstockvalueissuedundersharebasedcompensationplans Paymentsforstockvalueissuedundersharebasedcompensationplans	-448000	usd
	cbsh	Paymentsforstockvalueissuedundersharebasedcompensationplans Paymentsforstockvalueissuedundersharebasedcompensationplans	15000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	64078000	usd
CY2021Q4	us-gaap	Other Foreclosed Assets OtherForeclosedAssets	1100000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	61559000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2711763000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	706922000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-3225034000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	338008000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4296954000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2208328000	usd
CY2022Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1071920000	usd
CY2021Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2546336000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	62588000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	55440000	usd
	us-gaap	Interest Paid Net InterestPaidNet	8518000	usd
	us-gaap	Interest Paid Net InterestPaidNet	9909000	usd
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	25000	usd
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	172000	usd
CY2022Q2	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	5400000	usd
CY2021Q2	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	20600000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	15686627000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	15176359000	usd
CY2022Q2	us-gaap	Interest Receivable InterestReceivable	36100000	usd
CY2021Q4	us-gaap	Interest Receivable InterestReceivable	25900000	usd
CY2022Q2	cbsh	Pledged Financial Instruments Not Separately Reported Loans Receivable For Federal Home Loan Bank Debt PledgedFinancialInstrumentsNotSeparatelyReportedLoansReceivableForFederalHomeLoanBankDebt	3100000000	usd
CY2022Q2	cbsh	Pledged Financial Instruments Not Separately Reported Loans Receivable For Federal Reserve Bank Debt PledgedFinancialInstrumentsNotSeparatelyReportedLoansReceivableForFederalReserveBankDebt	1300000000	usd
CY2022Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	134710000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	150044000	usd
CY2022Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-7287000	usd
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	3399000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	6740000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	14202000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	2782000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	5596000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	3958000	usd
	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	8606000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	138039000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	138039000	usd
CY2022Q1	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	25032000	usd
CY2021Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	24204000	usd
CY2022Q2	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	125000	usd
	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	-703000	usd
CY2022Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	24907000	usd
CY2022Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	24907000	usd
CY2022Q2	cbsh	Financing Receivable Allowance For Credit Loss And Unfunded Lending Commitments Total FinancingReceivableAllowanceForCreditLossAndUnfundedLendingCommitmentsTotal	162946000	usd
CY2022Q2	cbsh	Financing Receivable Allowance For Credit Loss And Unfunded Lending Commitments Total FinancingReceivableAllowanceForCreditLossAndUnfundedLendingCommitmentsTotal	162946000	usd
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	200527000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	220834000	usd
CY2021Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	27433000	usd
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	37788000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	8868000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	21809000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	8169000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	11158000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	699000	usd
	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	10651000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	172395000	usd
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	172395000	usd
CY2021Q1	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	42430000	usd
CY2020Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	38307000	usd
CY2021Q2	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	18222000	usd
	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	14099000	usd
CY2021Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	24208000	usd
CY2021Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	24208000	usd
CY2021Q2	cbsh	Financing Receivable Allowance For Credit Loss And Unfunded Lending Commitments Total FinancingReceivableAllowanceForCreditLossAndUnfundedLendingCommitmentsTotal	196603000	usd
CY2021Q2	cbsh	Financing Receivable Allowance For Credit Loss And Unfunded Lending Commitments Total FinancingReceivableAllowanceForCreditLossAndUnfundedLendingCommitmentsTotal	196603000	usd
CY2022Q2	cbsh	Financing Receivable Recorded Investment Currentor Lessthan30days Past Due FinancingReceivableRecordedInvestmentCurrentorLessthan30daysPastDue	15629037000	usd
CY2022Q2	cbsh	Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due FinancingReceivableRecordedInvestmentThirtyToEightyNineDaysPastDue	37764000	usd
CY2022Q2	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	11909000	usd
CY2022Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	7917000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	15686627000	usd
CY2021Q4	cbsh	Financing Receivable Recorded Investment Currentor Lessthan30days Past Due FinancingReceivableRecordedInvestmentCurrentorLessthan30daysPastDue	15116475000	usd
CY2021Q4	cbsh	Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due FinancingReceivableRecordedInvestmentThirtyToEightyNineDaysPastDue	39001000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	11726000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	9157000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	15176359000	usd
CY2022Q2	cbsh	Credit Quality Personal Real Estate Loans Excluded CreditQualityPersonalRealEstateLoansExcluded	186000000	usd
CY2021Q4	cbsh	Credit Quality Personal Real Estate Loans Excluded CreditQualityPersonalRealEstateLoansExcluded	185600000	usd
CY2022Q2	cbsh	Consumer Healthcare Loans Excluded ConsumerHealthcareLoansExcluded	186600000	usd
CY2021Q4	cbsh	Consumer Healthcare Loans Excluded ConsumerHealthcareLoansExcluded	186600000	usd
CY2022Q2	cbsh	Credit Quality Personal Banking Loan Table Percentage Loans Excluded CreditQualityPersonalBankingLoanTablePercentageLoansExcluded	0.07	rate
CY2022Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	142380000	usd
CY2021Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	64887000	usd
	cbsh	Period After Which Loans Are Deemed In Default PeriodAfterWhichLoansAreDeemedInDefault	P90D
CY2022Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	142380000	usd
CY2022Q2	cbsh	Financing Receivable Troubled Debt Restructurings That Subsequently Defaulted Recorded Investment FinancingReceivableTroubledDebtRestructuringsThatSubsequentlyDefaultedRecordedInvestment	1315000	usd
	cbsh	Effect On Interest Income Resulting From Modification To Credit Card Loans EffectOnInterestIncomeResultingFromModificationToCreditCardLoans	673000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	15200000	usd
CY2022Q2	cbsh	Letters Of Credit To Customers With Substandard Risk Rating LettersOfCreditToCustomersWithSubstandardRiskRating	24000000	usd
CY2022Q2	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	1000000	usd
CY2022Q2	cbsh	Unpaid Principal Balanceon Personal Real Estate Loans Heldfor Sale UnpaidPrincipalBalanceonPersonalRealEstateLoansHeldforSale	1000000	usd
CY2022Q2	cbsh	Student Loans Heldfor Sale Lowerof Costor Fair Value StudentLoansHeldforSaleLowerofCostorFairValue	5400000	usd
CY2022Q2	cbsh	Hfs Loansonnonaccrualstatus HFSLoansonnonaccrualstatus	0	usd
CY2022Q2	cbsh	Loans Held For Sale90 Days Past Dueand Still Accruing LoansHeldForSale90DaysPastDueandStillAccruing	0	usd
CY2022Q2	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	296000	usd
CY2021Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	115000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	13700308000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	14450027000	usd
CY2022Q2	us-gaap	Trading Securities TradingSecurities	34195000	usd
CY2021Q4	us-gaap	Trading Securities TradingSecurities	46235000	usd
CY2022Q2	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	6130000	usd
CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	7153000	usd
CY2022Q2	cbsh	Equtiy Securitieswithout Readily Determinable Fair Values EqutiySecuritieswithoutReadilyDeterminableFairValues	2416000	usd
CY2021Q4	cbsh	Equtiy Securitieswithout Readily Determinable Fair Values EqutiySecuritieswithoutReadilyDeterminableFairValues	2049000	usd
CY2022Q2	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	34621000	usd
CY2021Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	34379000	usd
CY2022Q2	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	10163000	usd
CY2021Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	10428000	usd
CY2022Q2	us-gaap	Equity Method Investments EquityMethodInvestments	1434000	usd
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1834000	usd
CY2022Q2	cbsh	Private Equity Investments PrivateEquityInvestments	161771000	usd
CY2021Q4	cbsh	Private Equity Investments PrivateEquityInvestments	147406000	usd
CY2022Q2	cbsh	Total Investment Securities TotalInvestmentSecurities	13951038000	usd
CY2021Q4	cbsh	Total Investment Securities TotalInvestmentSecurities	14699511000	usd
CY2022Q2	us-gaap	Interest Receivable Current InterestReceivableCurrent	41500000	usd
CY2021Q4	us-gaap	Interest Receivable Current InterestReceivableCurrent	39500000	usd
CY2022Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	14783369000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	13700308000	usd
	cbsh	Percentage Decrease In Fair Value Below Amortized Cost PercentageDecreaseInFairValueBelowAmortizedCost	0.20
CY2022Q2	cbsh	Fair Value Securities On Impairment Watch List FairValueSecuritiesOnImpairmentWatchList	106400000	usd
CY2021Q4	cbsh	Fair Value Securities On Impairment Watch List FairValueSecuritiesOnImpairmentWatchList	13400000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	10711219000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	832760000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	1730123000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	259362000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	12441342000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1092122000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	8581829000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	118680000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	465833000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	14249000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	9047662000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	132929000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	12400000000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	9000000000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1100000000	usd
	cbsh	Af Ssecuritiesinlosspositionatperiodendchangeinunrealizedloss AFSsecuritiesinlosspositionatperiodendchangeinunrealizedloss	959200000	usd
CY2022Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	14783369000	usd
CY2022Q2	cbsh	Available For Sale Securities Gross Unreailzed Gainat Period End AvailableForSaleSecuritiesGrossUnreailzedGainatPeriodEnd	9061000	usd
CY2022Q2	cbsh	Available For Sale Securities Gross Unrealized Lossat Period End AvailableForSaleSecuritiesGrossUnrealizedLossatPeriodEnd	1092122000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	13700308000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	14419133000	usd
CY2021Q4	cbsh	Available For Sale Securities Gross Unreailzed Gainat Period End AvailableForSaleSecuritiesGrossUnreailzedGainatPeriodEnd	163823000	usd
CY2021Q4	cbsh	Available For Sale Securities Gross Unrealized Lossat Period End AvailableForSaleSecuritiesGrossUnrealizedLossatPeriodEnd	132929000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	14450027000	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	51948000	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
	cbsh	Proceeds From Sale Of Other Securities ProceedsFromSaleOfOtherSecurities	3805000	usd
	cbsh	Proceeds From Sale Of Other Securities ProceedsFromSaleOfOtherSecurities	10060000	usd
	cbsh	Proceedsfromsalesandmaturitiesofavailableforsaledebtequityandothersecurities Proceedsfromsalesandmaturitiesofavailableforsaledebtequityandothersecurities	55753000	usd
	cbsh	Proceedsfromsalesandmaturitiesofavailableforsaledebtequityandothersecurities Proceedsfromsalesandmaturitiesofavailableforsaledebtequityandothersecurities	10060000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	8192000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	26657000	usd
CY2022Q2	cbsh	Investment Securities Pledged At Fair Value InvestmentSecuritiesPledgedAtFairValue	5300000000	usd
CY2021Q4	cbsh	Investment Securities Pledged At Fair Value InvestmentSecuritiesPledgedAtFairValue	6400000000	usd
CY2022Q2	us-gaap	Financial Instruments Owned And Pledged As Collateral Amount Eligible To Be Repledged By Counterparty FinancialInstrumentsOwnedAndPledgedAsCollateralAmountEligibleToBeRepledgedByCounterparty	209900000	usd
CY2022Q2	cbsh	Investments Exceeding Ten Percent Of Stockholders Equity InvestmentsExceedingTenPercentOfStockholdersEquity	0
CY2022Q2	cbsh	Percentage Of Stockholders Equity Of Which No Investment From Single Issuer Exceeds PercentageOfStockholdersEquityOfWhichNoInvestmentFromSingleIssuerExceeds	0.10
CY2022Q2	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	53229000	usd
CY2022Q2	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	40976000	usd
CY2022Q2	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	0	usd
CY2022Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	12253000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	52140000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	39866000	usd
CY2021Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	304000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	11970000	usd
CY2022Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	501000	usd
CY2021Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	745000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1100000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1700000	usd
CY2022Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1885000	usd
CY2022Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1431000	usd
CY2022Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1272000	usd
CY2022Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1119000	usd
CY2022Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	974000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	138921000	usd
CY2022Q2	us-gaap	Goodwill Goodwill	138921000	usd
	us-gaap	Lease Income LeaseIncome	15920000	usd
CY2022Q2	us-gaap	Sales Type And Direct Financing Leases Profit Loss SalesTypeAndDirectFinancingLeasesProfitLoss	5114000	usd
CY2021Q2	us-gaap	Sales Type And Direct Financing Leases Profit Loss SalesTypeAndDirectFinancingLeasesProfitLoss	5795000	usd
	us-gaap	Sales Type And Direct Financing Leases Profit Loss SalesTypeAndDirectFinancingLeasesProfitLoss	10361000	usd
	us-gaap	Sales Type And Direct Financing Leases Profit Loss SalesTypeAndDirectFinancingLeasesProfitLoss	11916000	usd
CY2022Q2	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	2158000	usd
CY2021Q2	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	1930000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	4342000	usd
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	4004000	usd
CY2022Q2	us-gaap	Lease Income LeaseIncome	7272000	usd
CY2021Q2	us-gaap	Lease Income LeaseIncome	7725000	usd
	us-gaap	Lease Income LeaseIncome	14703000	usd
CY2022Q2	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	131000	usd
CY2021Q2	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	94000	usd
	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	263000	usd
	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	189000	usd
CY2022Q2	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	665000	usd
CY2021Q2	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	556000	usd
	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1330000	usd
	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1112000	usd
CY2022Q2	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	1125000	usd
CY2021Q2	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	1124000	usd
	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	2251000	usd
	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	2248000	usd
CY2022Q2	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-67000	usd
CY2021Q2	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-68000	usd
	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-135000	usd
	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-136000	usd
CY2022Q2	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-497000	usd
CY2021Q2	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-651000	usd
	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-995000	usd
	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-1302000	usd
CY2022Q2	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	101000	usd
CY2021Q2	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	109000	usd
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	202000	usd
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	219000	usd
	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0	usd
CY2022Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	168000	shares
CY2021Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	76000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	144000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	53000	shares
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	77080000	usd
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	-1123536000	usd
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	1762000	usd
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-1125298000	usd
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-281324000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-843974000	usd
CY2022Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-766894000	usd
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	331377000	usd
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	-137270000	usd
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	10715000	usd
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-147985000	usd
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-36998000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-110987000	usd
CY2021Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	220390000	usd
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	operating_segments
CY2022Q2	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	operating_segments
CY2022Q2	cbsh	Number Of Locations NumberOfLocations	150	locations
CY2021Q2	us-gaap	Revenues Revenues	0	usd
	us-gaap	Revenues Revenues	0	usd
	us-gaap	Revenues Revenues	0	usd
CY2022Q2	us-gaap	Revenues Revenues	0	usd
CY2022Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	232385000	usd
CY2022Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	7162000	usd
CY2022Q2	us-gaap	Noninterest Income NoninterestIncome	139427000	usd
CY2022Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	1029000	usd
CY2022Q2	us-gaap	Noninterest Expense NoninterestExpense	213505000	usd
CY2022Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	152174000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	441171000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-2696000	usd
	us-gaap	Noninterest Income NoninterestIncome	271196000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	8192000	usd
	us-gaap	Noninterest Expense NoninterestExpense	419153000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	304102000	usd
CY2021Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	207982000	usd
CY2021Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-45655000	usd
CY2021Q2	us-gaap	Noninterest Income NoninterestIncome	139143000	usd
CY2021Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	16804000	usd
CY2021Q2	us-gaap	Noninterest Expense NoninterestExpense	198126000	usd
CY2021Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	211458000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	413730000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-51887000	usd
	us-gaap	Noninterest Income NoninterestIncome	275188000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	26657000	usd
	us-gaap	Noninterest Expense NoninterestExpense	390699000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	376763000	usd
CY2022Q2	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	2857449000	usd
CY2021Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	2916181000	usd
CY2022Q2	us-gaap	Derivative Assets DerivativeAssets	12404000	usd
CY2021Q4	us-gaap	Derivative Assets DerivativeAssets	41842000	usd
CY2022Q2	us-gaap	Derivative Liabilities DerivativeLiabilities	27599000	usd
CY2021Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	12101000	usd
CY2022Q2	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	27599000	usd
CY2022Q2	cbsh	Derivative Liability Amount Offset By Asset DerivativeLiabilityAmountOffsetByAsset	0	usd
CY2022Q2	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	12404000	usd
CY2022Q2	cbsh	Derivative Asset Amount Offset By Liabiilty DerivativeAssetAmountOffsetByLiabiilty	0	usd
CY2022Q2	us-gaap	Derivative Assets DerivativeAssets	12404000	usd
CY2022Q2	us-gaap	Derivative Liabilities DerivativeLiabilities	27599000	usd
CY2021Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	41842000	usd
CY2021Q4	cbsh	Derivative Asset Amount Offset By Liabiilty DerivativeAssetAmountOffsetByLiabiilty	0	usd
CY2021Q4	us-gaap	Derivative Assets DerivativeAssets	41842000	usd
CY2021Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	12101000	usd
CY2021Q4	cbsh	Derivative Liability Amount Offset By Asset DerivativeLiabilityAmountOffsetByAsset	0	usd
CY2021Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	12101000	usd
CY2022Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4200000	usd
CY2021Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3800000	usd
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8400000	usd
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7700000	usd
CY2021Q4	cbsh	Nonvested Share Awards Balances NonvestedShareAwardsBalances	1120491	shares
CY2021Q4	cbsh	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Nonvested Share Awards Weighted Average Grant Date Unit Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedShareAwardsWeightedAverageGrantDateUnitFairValue	55.58
	cbsh	Nonvested Share Awards Granted In Period NonvestedShareAwardsGrantedInPeriod	236483	shares
	cbsh	Share Based Compensation Granted Nonvested Share Award Weighted Average Grant Date Fair Value ShareBasedCompensationGrantedNonvestedShareAwardWeightedAverageGrantDateFairValue	70.82
	cbsh	Nonvested Share Awards Vested In Period NonvestedShareAwardsVestedInPeriod	247869	shares
	cbsh	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Nonvested Share Awards Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedShareAwardsVestedInPeriodWeightedAverageGrantDateFairValue	47.64
	cbsh	Nonvested Share Awards Forfeited In Period NonvestedShareAwardsForfeitedInPeriod	18367	shares
	cbsh	Share Based Compensation Forfeited Nonvested Share Award Weighted Average Grant Date Fair Value ShareBasedCompensationForfeitedNonvestedShareAwardWeightedAverageGrantDateFairValue	59.80
CY2022Q2	cbsh	Nonvested Share Awards Balances NonvestedShareAwardsBalances	1090738	shares
CY2022Q2	cbsh	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Nonvested Share Awards Weighted Average Grant Date Unit Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedShareAwardsWeightedAverageGrantDateUnitFairValue	60.62
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	17.42
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.015
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.284
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.016
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P5Y8M12D
CY2022Q2	cbsh	Financial Instruments Owned Other Debt Securities At Fair Value FinancialInstrumentsOwnedOtherDebtSecuritiesAtFairValue	543990000	usd
CY2022Q2	us-gaap	Trading Securities TradingSecurities	34195000	usd
CY2021Q4	cbsh	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumber	896348	shares
CY2021Q4	cbsh	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageExercisePrice	46.21
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	96318	shares
	cbsh	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice	70.64
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	6390	shares
	cbsh	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodWeightedAverageExercisePrice	60.86
	cbsh	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expired In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredInPeriod	1013	shares
	cbsh	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expired In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredInPeriodWeightedAverageExercisePrice	60.19
	cbsh	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Exercised In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriod	30216	shares
	cbsh	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Exercised In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice	44.26
CY2022Q2	cbsh	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumber	955047	shares
CY2022Q2	cbsh	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageExercisePrice	48.62
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Remaining Contractual Terms ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms	P5Y8M12D
CY2022Q2	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Intrinsic Value Outstanding SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding	17024000	usd
	cbsh	Percentof Revenuenotinscopeof Asc606 PercentofRevenuenotinscopeofASC606	0.62
CY2022Q2	us-gaap	Noninterest Income NoninterestIncome	139427000	usd
CY2021Q2	us-gaap	Noninterest Income NoninterestIncome	139143000	usd
	us-gaap	Noninterest Income NoninterestIncome	271196000	usd
	us-gaap	Noninterest Income NoninterestIncome	275188000	usd
CY2022Q2	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	1036000	usd
CY2022Q2	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	1109128000	usd
CY2022Q2	cbsh	Us Government Sponsored Enterprises Debt Securities USGovernmentSponsoredEnterprisesDebtSecurities	47108000	usd
CY2022Q2	us-gaap	Financial Instruments Owned State And Municipal Government Obligations At Fair Value FinancialInstrumentsOwnedStateAndMunicipalGovernmentObligationsAtFairValue	1952798000	usd
CY2022Q2	cbsh	Financial Instruments Owned Agency Mortgage Backed Securities At Fair Value FinancialInstrumentsOwnedAgencyMortgageBackedSecuritiesAtFairValue	4923683000	usd
CY2022Q2	cbsh	Financial Instruments Owned Non Agency Mortgage Backed Securities At Fair Value FinancialInstrumentsOwnedNonAgencyMortgageBackedSecuritiesAtFairValue	1329114000	usd
CY2022Q2	cbsh	Other Asset Backed Securities Disclosure OtherAssetBackedSecuritiesDisclosure	3794487000	usd
CY2022Q2	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	6130000	usd
CY2022Q2	us-gaap	Financial Instruments Owned Principal Investments At Fair Value FinancialInstrumentsOwnedPrincipalInvestmentsAtFairValue	161771000	usd
CY2022Q2	us-gaap	Derivative Assets DerivativeAssets	12404000	usd
CY2022Q2	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	17862000	usd
CY2022Q2	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	13933706000	usd
CY2022Q2	us-gaap	Derivative Liabilities DerivativeLiabilities	27599000	usd
CY2022Q2	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	17862000	usd
CY2022Q2	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	45461000	usd
CY2021Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	5570000	usd
CY2021Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	1080720000	usd
CY2021Q4	cbsh	Us Government Sponsored Enterprises Debt Securities USGovernmentSponsoredEnterprisesDebtSecurities	51755000	usd
CY2021Q4	us-gaap	Financial Instruments Owned State And Municipal Government Obligations At Fair Value FinancialInstrumentsOwnedStateAndMunicipalGovernmentObligationsAtFairValue	2096827000	usd
CY2021Q4	cbsh	Financial Instruments Owned Agency Mortgage Backed Securities At Fair Value FinancialInstrumentsOwnedAgencyMortgageBackedSecuritiesAtFairValue	5683000000	usd
CY2021Q4	cbsh	Financial Instruments Owned Non Agency Mortgage Backed Securities At Fair Value FinancialInstrumentsOwnedNonAgencyMortgageBackedSecuritiesAtFairValue	1366477000	usd
CY2021Q4	cbsh	Other Asset Backed Securities Disclosure OtherAssetBackedSecuritiesDisclosure	3539219000	usd
CY2021Q4	cbsh	Financial Instruments Owned Other Debt Securities At Fair Value FinancialInstrumentsOwnedOtherDebtSecuritiesAtFairValue	632029000	usd
CY2021Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	14720027000	usd
CY2021Q4	us-gaap	Trading Securities TradingSecurities	46235000	usd
CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	7153000	usd
CY2021Q4	us-gaap	Financial Instruments Owned Principal Investments At Fair Value FinancialInstrumentsOwnedPrincipalInvestmentsAtFairValue	147406000	usd
CY2021Q4	us-gaap	Derivative Assets DerivativeAssets	41842000	usd
CY2021Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	21794000	usd
CY2021Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	12101000	usd
CY2021Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	21794000	usd
CY2021Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	33895000	usd
CY2022Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	155534000	usd
CY2022Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-15502000	usd
CY2022Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	-87000	usd
CY2022Q2	cbsh	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Discount Accretion FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetDiscountAccretion	1000	usd
CY2022Q2	cbsh	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchase Of Private Equity Securities FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchaseOfPrivateEquitySecurities	822000	usd
CY2022Q2	cbsh	Sales And Repayments Of Private Equity Securities SalesAndRepaymentsOfPrivateEquitySecurities	8095000	usd
CY2022Q2	cbsh	Purchase Of Risk Participation Agreement PurchaseOfRiskParticipationAgreement	314000	usd
CY2022Q2	cbsh	Sale Of Risk Participation Agreement SaleOfRiskParticipationAgreement	250000	usd
CY2022Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	163741000	usd
CY2022Q2	cbsh	Change In Unrealized Gains Or Losses Related To Assets Held Level3 Fair Value Measurements ChangeInUnrealizedGainsOrLossesRelatedToAssetsHeldLevel3FairValueMeasurements	15781000	usd
CY2022Q2	cbsh	Gains Losses Included In Oci Attributable To Change In Unrealized Gains Losses Relating To Assets Still Held Total GainsLossesIncludedInOCIAttributableToChangeInUnrealizedGainsLossesRelatingToAssetsStillHeldTotal	-87000	usd
CY2021Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	149961000	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-22457000	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	-170000	usd
	cbsh	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Discount Accretion FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetDiscountAccretion	2000	usd
	cbsh	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchase Of Private Equity Securities FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchaseOfPrivateEquitySecurities	1122000	usd
	cbsh	Sales And Repayments Of Private Equity Securities SalesAndRepaymentsOfPrivateEquitySecurities	9840000	usd
	cbsh	Purchase Of Risk Participation Agreement PurchaseOfRiskParticipationAgreement	459000	usd
	cbsh	Sale Of Risk Participation Agreement SaleOfRiskParticipationAgreement	250000	usd
CY2022Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	163741000	usd
	cbsh	Change In Unrealized Gains Or Losses Related To Assets Held Level3 Fair Value Measurements ChangeInUnrealizedGainsOrLossesRelatedToAssetsHeldLevel3FairValueMeasurements	23169000	usd
	cbsh	Gains Losses Included In Oci Attributable To Change In Unrealized Gains Losses Relating To Assets Still Held Total GainsLossesIncludedInOCIAttributableToChangeInUnrealizedGainsLossesRelatingToAssetsStillHeldTotal	-170000	usd
CY2021Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	103863000	usd
CY2021Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-16246000	usd
CY2021Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	18000	usd
CY2021Q2	cbsh	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Discount Accretion FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetDiscountAccretion	3000	usd
CY2021Q2	cbsh	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchase Of Private Equity Securities FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchaseOfPrivateEquitySecurities	5656000	usd
CY2021Q2	cbsh	Sales And Repayments Of Private Equity Securities SalesAndRepaymentsOfPrivateEquitySecurities	356000	usd
CY2021Q2	cbsh	Capitalized Interest Or Dividends CapitalizedInterestOrDividends	23000	usd
CY2021Q2	cbsh	Purchase Of Risk Participation Agreement PurchaseOfRiskParticipationAgreement	445000	usd
CY2021Q2	cbsh	Sale Of Risk Participation Agreement SaleOfRiskParticipationAgreement	32000	usd
CY2021Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	125866000	usd
CY2021Q2	cbsh	Change In Unrealized Gains Or Losses Related To Assets Held Level3 Fair Value Measurements ChangeInUnrealizedGainsOrLossesRelatedToAssetsHeldLevel3FairValueMeasurements	18100000	usd
CY2021Q2	cbsh	Gains Losses Included In Oci Attributable To Change In Unrealized Gains Losses Relating To Assets Still Held Total GainsLossesIncludedInOCIAttributableToChangeInUnrealizedGainsLossesRelatingToAssetsStillHeldTotal	18000	usd
CY2020Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	105077000	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-23604000	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	17000	usd
	cbsh	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Discount Accretion FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetDiscountAccretion	6000	usd
	cbsh	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchase Of Private Equity Securities FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchaseOfPrivateEquitySecurities	5656000	usd
	cbsh	Sales And Repayments Of Private Equity Securities SalesAndRepaymentsOfPrivateEquitySecurities	8832000	usd
	cbsh	Capitalized Interest Or Dividends CapitalizedInterestOrDividends	23000	usd
	cbsh	Purchase Of Risk Participation Agreement PurchaseOfRiskParticipationAgreement	445000	usd
	cbsh	Sale Of Risk Participation Agreement SaleOfRiskParticipationAgreement	130000	usd
CY2021Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	125866000	usd
	cbsh	Change In Unrealized Gains Or Losses Related To Assets Held Level3 Fair Value Measurements ChangeInUnrealizedGainsOrLossesRelatedToAssetsHeldLevel3FairValueMeasurements	26660000	usd
	cbsh	Gains Losses Included In Oci Attributable To Change In Unrealized Gains Losses Relating To Assets Still Held Total GainsLossesIncludedInOCIAttributableToChangeInUnrealizedGainsLossesRelatingToAssetsStillHeldTotal	17000	usd
CY2022Q2	cbsh	Total Gains Or Losses Included In Earnings Level3 Fair Measurements TotalGainsOrLossesIncludedInEarningsLevel3FairMeasurements	15502000	usd
CY2022Q2	cbsh	Change In Unrealized Gains Or Losses Related To Assets Held Level3 Fair Value Measurements ChangeInUnrealizedGainsOrLossesRelatedToAssetsHeldLevel3FairValueMeasurements	15781000	usd
	cbsh	Total Gains Or Losses Included In Earnings Level3 Fair Measurements TotalGainsOrLossesIncludedInEarningsLevel3FairMeasurements	22457000	usd
	cbsh	Change In Unrealized Gains Or Losses Related To Assets Held Level3 Fair Value Measurements ChangeInUnrealizedGainsOrLossesRelatedToAssetsHeldLevel3FairValueMeasurements	23169000	usd
CY2021Q2	cbsh	Total Gains Or Losses Included In Earnings Level3 Fair Measurements TotalGainsOrLossesIncludedInEarningsLevel3FairMeasurements	16246000	usd
CY2021Q2	cbsh	Change In Unrealized Gains Or Losses Related To Assets Held Level3 Fair Value Measurements ChangeInUnrealizedGainsOrLossesRelatedToAssetsHeldLevel3FairValueMeasurements	18100000	usd
	cbsh	Total Gains Or Losses Included In Earnings Level3 Fair Measurements TotalGainsOrLossesIncludedInEarningsLevel3FairMeasurements	23604000	usd
	cbsh	Change In Unrealized Gains Or Losses Related To Assets Held Level3 Fair Value Measurements ChangeInUnrealizedGainsOrLossesRelatedToAssetsHeldLevel3FairValueMeasurements	26660000	usd
CY2022Q2	cbsh	Mortgage Servicing Rights Nonrecurring Basis MortgageServicingRightsNonrecurringBasis	11407000	usd
	cbsh	Mortgage Servicing Rights Nonrecurring Basis Gains Losses MortgageServicingRightsNonrecurringBasisGainsLosses	304000	usd
CY2022Q2	cbsh	Long Lived Assets Nonrecurring Basis LongLivedAssetsNonrecurringBasis	484000	usd
	cbsh	Long Lived Assets Nonrecurring Basis Gains Losses LongLivedAssetsNonrecurringBasisGainsLosses	-965000	usd
CY2021Q2	cbsh	Mortgage Servicing Rights Nonrecurring Basis MortgageServicingRightsNonrecurringBasis	9376000	usd
	cbsh	Mortgage Servicing Rights Nonrecurring Basis Gains Losses MortgageServicingRightsNonrecurringBasisGainsLosses	1299000	usd
CY2021Q2	cbsh	Long Lived Assets Nonrecurring Basis LongLivedAssetsNonrecurringBasis	984000	usd
	cbsh	Long Lived Assets Nonrecurring Basis Gains Losses LongLivedAssetsNonrecurringBasisGainsLosses	-276000	usd
	cbsh	Fair Value Discounted Cash Flow Valuation Techniques FairValueDiscountedCashFlowValuationTechniques	Discounted cash flow

Files In Submission

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$CBSH
COMMERCE BANCSHARES INC /MO/ Stock $cbsh

2022 Q3 Form 10-Q Financial Statement

#000002235622000044 Filed on August 05, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CBSH COMMERCE BANCSHARES INC /MO/ Stock $cbsh

2022 Q3 Form 10-Q Financial Statement

#000002235622000044 Filed on August 05, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CBSH
COMMERCE BANCSHARES INC /MO/ Stock $cbsh