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Regulatory Capital Requirements (Tables)

12 Months Ended

Dec. 31, 2015

Regulatory Capital Requirements [Abstract]

Summary of Capital Amounts and Ratios

The Company's and the Bank's capital amounts and ratios are presented in the following tables.



		Actual									Minimum Regulatory Requirement
(Dollars in millions)		Amount				Ratio					Amount				Ratio
Capital Ratios for the Company:
As of December 31, 2015 (U.S. Basel III):
Common equity tier 1 capital (to risk-weighted assets)		$	12,920			13.63	%		≥		$	4,265			4.5	%
Tier 1 capital (to risk-weighted assets)		12,923				13.64			≥		5,687				6.0
Total capital (to risk-weighted assets)		14,747				15.56			≥		7,582				8.0
Tier 1 leverage⁽¹⁾		12,923				11.40			≥		4,535				4.0
As of December 31, 2014 (U.S. Basel I):
Tier 1 capital (to risk-weighted assets)		$	12,367			12.79	%		≥		$	3,867			4.0	%
Total capital (to risk-weighted assets)		14,246				14.74			≥		7,733				8.0
Tier 1 leverage⁽¹⁾		12,367				11.25			≥		4,396				4.0


(1)	Tier 1 capital divided by quarterly average assets (excluding certain intangible assets).



		Actual									Minimum Regulatory Requirement									To Be Well-Capitalized Under Prompt Corrective Action Provisions
(Dollars in millions)		Amount				Ratio					Amount				Ratio					Amount				Ratio
Capital Ratios for the Bank:
As of December 31, 2015 (U.S. Basel III):
Common equity tier 1 capital (to risk-weighted assets)		$	12,384			13.18	%		≥		$	4,227			4.5	%		≥		$	6,105			6.5	%
Tier 1 capital (to risk-weighted assets)		12,384				13.18			≥		5,636				6.0			≥		7,514				8.0
Total capital (to risk-weighted assets)		14,003				14.91			≥		7,514				8.0			≥		9,393				10.0
Tier 1 leverage⁽¹⁾		12,384				11.03			≥		4,490				4.0			≥		5,612				5.0
As of December 31, 2014 (U.S. Basel III):
Common equity tier 1 capital (to risk-weighted assets)		$	12,087			13.09	%		≥		n/a				n/a			≥		n/a				n/a
Tier 1 capital (to risk-weighted assets)		12,088				13.09			≥		$	5,080			5.5	%		≥		$	5,542			6.0	%
Total capital (to risk-weighted assets)		13,656				14.78			≥		7,389				8.0			≥		9,237				10.0
Tier 1 leverage⁽¹⁾		12,088				11.09			≥		4,361				4.0			≥		5,452				5.0


(1)	Tier 1 capital divided by quarterly average assets (excluding certain intangible assets).