Regulatory Requirements - Risk-Based Regulatory Capital Ratio Requirements (Details)	Jun. 30, 2022	Dec. 31, 2021
Common Equity Tier 1 capital ratio
Regulatory Minimum (as a percent)	0.045
Standardized (as a percent)	13.20%	13.20%
Advanced (as a percent)	0.100	0.100
Tier 1 capital ratio
Regulatory Minimum (as a percent)	0.060
Standardized (as a percent)	0.147	0.147
Advanced (as a percent)	0.115	0.115
Total capital ratio
Regulatory Minimum (as a percent)	0.080
Standardized (as a percent)	0.167	0.167
Advanced (as a percent)	0.135	0.135