Regulatory Capital (Narrative) (Details)	Jan. 01, 2019	Dec. 31, 2020
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital to risk-weighted assets minimum ratio		4.50%
Total Capital to risk-weighted assets		0.080
Tier 1 leverage ratio		0.040
Capital conversion buffer percentage	2.50%
Capital conservation buffer, phase In period	3 years
PCA well capitalized		0.0500
Maximum
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum ratio of Tier 1 capital to risk-weighted assets		0.060