Shareholders' Equity - Narrative (Details) - USD ($)	1 Months Ended						3 Months Ended							6 Months Ended	9 Months Ended
	Oct. 31, 2022	Sep. 30, 2021	Sep. 30, 2018	Apr. 30, 2016	May 31, 2015	Feb. 28, 2014	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Jul. 31, 2021	Apr. 30, 2021	Jan. 31, 2021
Class of Stock [Line Items]
Preferred stock cash dividend								$ 21,000,000	$ 35,000,000	$ 20,000,000	$ 20,000,000	$ 34,000,000	$ 25,000,000		$ 76,000,000	$ 79,000,000
Proceeds from issuance of common stock, net of issuance costs		$ 1,900,000,000													0	$ 1,900,000,000
Amount of common stock authorized for repurchase																	$ 3,000,000,000	$ 425,000,000	$ 475,000,000
Total common stock acquired														$ 0	$ 0
Common Stock
Class of Stock [Line Items]
Depositary shares issued (shares)		21,700,000
Offering price (in dollars per share)		$ 87.60									$ 87.60					$ 87.60
Series D Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)								$ 1,475			$ 1,475				$ 4,425	$ 4,425
Preferred stock cash dividend								$ 11,000,000			$ 11,000,000				$ 33,000,000	$ 33,000,000
Series F Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)								$ 1,387			$ 950				$ 3,467	$ 2,869
Preferred stock cash dividend								$ 3,000,000			$ 2,000,000				$ 9,000,000	$ 11,000,000
Series G Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)								$ 1,338			$ 1,338				$ 4,014	$ 4,014,000,000
Preferred stock cash dividend								$ 7,000,000			$ 7,000,000				$ 20,000,000	$ 21,000,000
Series D Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)								$ 0.37			$ 0.37				$ 1.11	$ 1.11
Depositary shares issued (shares)						30,000,000
Series F Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)								13.87			9.50				34.67	28.69
Depositary shares issued (shares)					250,000
Series G Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)								$ 0.33			$ 0.33				0.99	0.99
Depositary shares issued (shares)				20,000,000
Series H Preferred Stock
Class of Stock [Line Items]
Preferred dividends declared (USD per share)															$ 2,813	$ 2,813
Preferred stock cash dividend															$ 14,000,000	$ 14,000,000
Series H Preferred Stock, Depository Share
Class of Stock [Line Items]
Preferred dividends declared (USD per share)															$ 28.13	$ 28.13
Depositary shares issued (shares)			500,000
Forecast
Class of Stock [Line Items]
Total common stock acquired							$ 1,000,000,000
Forecast | Series D Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,475
Preferred stock cash dividend	$ 11,000,000
Forecast | Series F Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,742
Preferred stock cash dividend	$ 4,000,000
Forecast | Series G Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 1,338
Preferred stock cash dividend	$ 7,000,000
Forecast | Series D Preferred Stock, Depository Share | Subsequent Event
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 0.37
Forecast | Series F Preferred Stock, Depository Share | Subsequent Event
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	17.42
Forecast | Series G Preferred Stock, Depository Share | Subsequent Event
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	0.33
Forecast | Series H Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 2,813
Preferred stock cash dividend	$ 14,000,000
Forecast | Series H Preferred Stock, Depository Share | Subsequent Event
Class of Stock [Line Items]
Preferred dividends declared (USD per share)	$ 28.13