Capital (Tables)

12 Months Ended

Dec. 31, 2022

Banking Regulation, Total Capital [Abstract]

Regulatory Capital Ratios for Company in Comparison With Minimum Amounts and Ratios Required by Federal Reserve Board of Governors

The following tables present the regulatory capital ratios for the Company at December 31, 2022 and 2021, in comparison with the minimum amounts and ratios required by the FRB for capital adequacy purposes:

	Risk-Based Capital
At December 31, 2022	Common Equity Tier 1					Tier 1					Total					Leverage Capital
(dollars in millions)	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
Total capital	$	6,335		9.06	%	$	6,838		9.78	%	$	8,154		11.66	%	$	6,838		9.70	%
Minimum for capital    adequacy purposes		3,146		4.50			4,195		6.00			5,593		8.00			2,819		4.00
Excess	$	3,189		4.56	%	$	2,643		3.78	%	$	2,561		3.66	%	$	4,019		5.70	%

	Risk-Based Capital
At December 31, 2021	Common Equity Tier 1					Tier 1					Total					Leverage Capital
(dollars in millions)	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
Total capital	$	4,226		9.68	%	$	4,729		10.83	%	$	5,558		12.73	%	$	4,729		8.46	%
Minimum for capital    adequacy purposes		1,966		4.50			2,621		6.00			3,494		8.00			2,237		4.00
Excess	$	2,260		5.18	%	$	2,108		4.83	%	$	2,064		4.73	%	$	2,492		4.46	%

Actual Capital Amounts and Ratios for Community Bank in Comparison to Minimum Amounts and Ratios Required

The following tables present the actual capital amounts and ratios for the Bank at December 31, 2022 and 2021 in comparison to the minimum amounts and ratios required for capital adequacy purposes.

	Risk-Based Capital
At December 31, 2022	Common Equity Tier 1					Tier 1					Total					Leverage Capital
(dollars in millions)	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
Total capital	$	7,653		10.96	%	$	7,653		10.96	%	$	7,982		11.43	%	$	7,653		10.87	%
Minimum for capital adequacy    purposes		3,142		4.50			4,189		6.00			5,585		8.00			2,817		4.00
Excess	$	4,511		6.46	%	$	3,464		4.96	%	$	2,397		3.43	%	$	4,836		6.87	%

	Risk-Based Capital
At December 31, 2021	Common Equity Tier 1					Tier 1					Total					Leverage Capital
(dollars in millions)	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
Total capital	$	5,217		11.95	%	$	5,217		11.95	%	$	5,402		12.38	%	$	5,217		9.33	%
Minimum for capital adequacy    purposes		1,964		4.50			2,619		6.00			3,491		8.00			2,236		4.00
Excess	$	3,253		7.45	%	$	2,598		5.95	%	$	1,911		4.38	%	$	2,981		5.33	%