Regulatory Capital Requirements (Tables)

12 Months Ended

Dec. 31, 2022

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Schedule Of Capital Amounts And Ratios On Consolidated Basis

The following tables show the capital amounts and ratios for the Company (on a consolidated basis) and the Bank, together with the minimum capital adequacy and well-capitalized capital requirements, at the last two year ends.

	Actual				Minimum Capital Adequacy Requirement				Well-Capitalized Capital Requirement
(Dollars in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio
December 31, 2022
Total Capital (to risk-weighted assets):
Commerce Bancshares, Inc. (consolidated)	$	3,600,920	14.89	%	$	1,934,274	8.00	%	N.A.		N.A.
Commerce Bank	3,125,987		13.05		1,916,529		8.00		$	2,395,661	10.00	%
Tier I Capital (to risk-weighted assets):
Commerce Bancshares, Inc. (consolidated)	$	3,417,223	14.13	%	$	1,450,705	6.00	%	N.A.		N.A.
Commerce Bank	2,942,291		12.28		1,437,397		6.00		$	1,916,529	8.00	%
Tier I Common Capital (to risk-weighted assets):
Commerce Bancshares, Inc. (consolidated)	$	3,417,223	14.13	%	$	1,088,029	4.50	%	N.A.		N.A.
Commerce Bank	2,942,291		12.28		1,078,047		4.50		$	1,557,180	6.50	%
Tier I Capital (to adjusted quarterly average assets):
(Leverage Ratio)
Commerce Bancshares, Inc. (consolidated)	$	3,417,223	10.34	%	$	1,322,102	4.00	%	N.A.		N.A.
Commerce Bank	2,942,291		8.86		1,328,220		4.00		$	1,660,275	5.00	%
December 31, 2021
Total Capital (to risk-weighted assets):
Commerce Bancshares, Inc. (consolidated)	$	3,399,880	15.12	%	$	1,798,700	8.00	%	N.A.		N.A.
Commerce Bank	2,939,345		13.19		1,783,288		8.00		$	2,229,110	10.00	%
Tier I Capital (to risk-weighted assets):
Commerce Bancshares, Inc. (consolidated)	$	3,225,044	14.34	%	$	1,349,025	6.00	%	N.A.		N.A.
Commerce Bank	2,764,509		12.40		1,337,466		6.00		$	1,783,288	8.00	%
Tier I Common Capital (to risk-weighted assets):
Commerce Bancshares, Inc. (consolidated)	$	3,225,044	14.34	%	$	1,011,769	4.50	%	N.A.		N.A.
Commerce Bank	2,764,509		12.40		1,003,100		4.50		$	1,448,922	6.50	%
Tier I Capital (to adjusted quarterly average assets):
(Leverage Ratio)
Commerce Bancshares, Inc. (consolidated)	$	3,225,044	9.13	%	$	1,412,370	4.00	%	N.A.		N.A.
Commerce Bank	2,764,509		7.86		1,406,785		4.00		$	1,758,482	5.00	%