Regulatory Requirements - Capital Buffer Requirements (Details)	Mar. 31, 2022	Dec. 31, 2021
Capital conservation buffer
Advanced (as a percent)	0.025	0.025
SCB
Standardized (as a percent)	0.057	0.057
G-SIB capital surcharge
Standardized (as a percent)	0.030	0.030
Advanced (as a percent)	0.030	0.030
CCyB
Standardized (as a percent)	0	0
Advanced (as a percent)	0	0
Capital buffer requirement
Standardized (as a percent)	0.087	0.087
Advanced (as a percent)	0.055	0.055
Maximum
CCyB
Standardized (as a percent)	0.025