Regulatory Capital (Tables)

12 Months Ended

Dec. 31, 2022

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

Schedule of Compliance with Regulatory Capital Requirements

The following table includes the Basel III requirements for regulatory capital ratios.

	Basel III Minimums		Basel III Conservation Buffers		Basel III Requirements
Regulatory capital ratios
Total risk-based capital	8.00	%	2.50	%	10.50	%
Tier 1 risk-based capital	6.00		2.50		8.50
Common equity Tier 1	4.50		2.50		7.00
Tier 1 leverage	4.00		—		4.00

The regulatory capital ratios for BancShares and FCB exceed the Basel III requirements and the PCA well-capitalized thresholds as of December 31, 2022 and 2021 as summarized in the following table.

dollars in millions					December 31, 2022				December 31, 2021
	Basel III Requirements		PCA well-capitalized thresholds		Amount		Ratio		Amount		Ratio
BancShares
Total risk-based capital	10.50	%	10.00	%	$	11,799	13.18	%	$	5,042	14.35	%
Tier 1 risk-based capital	8.50		8.00		9,902		11.06		4,380		12.47
Common equity Tier 1	7.00		6.50		9,021		10.08		4,041		11.50
Tier 1 leverage	4.00		5.00		9,902		8.99		4,380		7.59
FCB
Total risk-based capital	10.50	%	10.00	%	$	11,627	12.99	%	$	4,858	13.85	%
Tier 1 risk-based capital	8.50		8.00		10,186		11.38		4,651		13.26
Common equity Tier 1	7.00		6.50		10,186		11.38		4,651		13.26
Tier 1 leverage	4.00		5.00		10,186		9.25		4,651		8.07