Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2019

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

Summary Of Actual Capital Amounts And Ratios For The Company And Its Three Largest Subsidiary Banks

(Dollar amounts in millions)	December 31, 2019				To be well-capitalized
	Amount		Ratio		Amount		Ratio
Basel III Regulatory Capital Amounts and Ratios
Total capital (to risk-weighted assets)	$	7,411	13.2	%	$	5,604	10.0	%
Tier 1 capital (to risk-weighted assets)	6,285		11.2		4,483		8.0
Common equity tier 1 capital (to risk-weighted assets)	5,719		10.2		3,643		6.5
Tier 1 capital (to average assets)	6,285		9.2		3,426		5.0

	December 31, 2018				To be well-capitalized
(Dollar amounts in millions)	Amount		Ratio		Amount		Ratio
Basel III Regulatory Capital Amounts and Ratios
Total capital (to risk-weighted assets)	$	7,450	13.9	%	$	5,359	10.0	%
Tier 1 capital (to risk-weighted assets)	6,811		12.7		4,287		8.0
Common equity tier 1 capital (to risk-weighted assets)	6,245		11.7		3,483		6.5
Tier 1 capital (to average assets)	6,811		10.3		3,317		5.0

Risk Weighted Assets [Table Text Block]

	December 31, 2019
	Actual Capital Ratio		Minimum Capital Ratio		Capital Conservation Buffer Ratio		Capital Ratio in Excess of Minimum Capital Ratio plus Capital Conservation Buffer Requirement
Total capital (to risk-weighted assets)	13.2	%	8.0	%	2.5	%	2.7	%
Tier 1 capital (to risk-weighted assets)	11.2		6.0		2.5		2.7
Common equity tier 1 capital (to risk-weighted assets)	10.2		4.5		2.5		3.2