Shareholders' Equity - Comprehensive Capital Plan (Details) - USD ($) $ / shares in Units, $ in Billions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jul. 31, 2021
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends declared on Common Shares (in usd per share)	$ 0.195	$ 0.185	$ 0.585	$ 0.555
Employee Equity Compensation Programs
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Stock repurchase program, amount authorized (up to)					$ 1.5
2021 Capital Plan
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends declared on Common Shares (in usd per share)	$ 0.195