Shareholders' Equity - Summary of Perpetual Preferred Stock Issued and Outstanding (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended
	Aug. 31, 2023	Sep. 30, 2023
Class of Stock [Line Items]
Shares Authorized (in shares)		486,700
Shares Issued (in shares)		420,282
Shares Outstanding (in shares)		420,280
Redemption Value ($ in millions)		$ 11,203
Series A Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		50,000
Shares Issued (in shares)		30,000
Shares Outstanding (in shares)		29,999
Depositary Shares Per Share (in shares)		1,000
Liquidation Preference (in dollars per share)		$ 25,000
Redemption Value ($ in millions)		$ 750
Par value on preferred stock (in dollars per share)		$ 0.01
Series C Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		25,000
Shares Issued (in shares)		8,000
Shares Outstanding (in shares)		8,000
Depositary Shares Per Share (in shares)		1,000
Liquidation Preference (in dollars per share)		$ 25,000
Redemption Value ($ in millions)		$ 200
Par value on preferred stock (in dollars per share)		$ 0.01
Series D Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		60,000
Shares Issued (in shares)		54,000
Shares Outstanding (in shares)		53,999
Depositary Shares Per Share (in shares)		1,000
Liquidation Preference (in dollars per share)		$ 25,000
Redemption Value ($ in millions)		$ 1,350
Par value on preferred stock (in dollars per share)		$ 0.01
Series E Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		17,500
Shares Issued (in shares)		7,667
Shares Outstanding (in shares)		7,667
Liquidation Preference (in dollars per share)		$ 100,000
Redemption Value ($ in millions)		$ 767
Par value on preferred stock (in dollars per share)		$ 0.01
Series F Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		5,000
Shares Issued (in shares)		1,615
Shares Outstanding (in shares)		1,615
Liquidation Preference (in dollars per share)		$ 100,000
Redemption Value ($ in millions)		$ 161
Par value on preferred stock (in dollars per share)		$ 0.01
Series K Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		32,200
Shares Issued (in shares)		28,000
Shares Outstanding (in shares)		28,000
Depositary Shares Per Share (in shares)		1,000
Liquidation Preference (in dollars per share)		$ 25,000
Redemption Value ($ in millions)		$ 700
Par value on preferred stock (in dollars per share)		$ 0.01
Series O Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		26,000
Shares Issued (in shares)		26,000
Shares Outstanding (in shares)		26,000
Depositary Shares Per Share (in shares)		25
Liquidation Preference (in dollars per share)		$ 25,000
Redemption Value ($ in millions)		$ 650
Par value on preferred stock (in dollars per share)		$ 0.01
Series P Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		66,000
Shares Issued (in shares)		60,000
Shares Outstanding (in shares)		60,000
Depositary Shares Per Share (in shares)		25
Liquidation Preference (in dollars per share)		$ 25,000
Redemption Value ($ in millions)		$ 1,500
Par value on preferred stock (in dollars per share)		$ 0.01
Series Q Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		20,000
Shares Issued (in shares)		20,000
Shares Outstanding (in shares)		20,000
Depositary Shares Per Share (in shares)		25
Liquidation Preference (in dollars per share)		$ 25,000
Redemption Value ($ in millions)		$ 500
Par value on preferred stock (in dollars per share)		$ 0.01
Series R Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		24,000
Shares Issued (in shares)		24,000
Shares Outstanding (in shares)		24,000
Depositary Shares Per Share (in shares)		25
Liquidation Preference (in dollars per share)		$ 25,000
Redemption Value ($ in millions)		$ 600
Par value on preferred stock (in dollars per share)		$ 0.01
Series S Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		14,000
Shares Issued (in shares)		14,000
Shares Outstanding (in shares)		14,000
Depositary Shares Per Share (in shares)		25
Liquidation Preference (in dollars per share)		$ 25,000
Redemption Value ($ in millions)		$ 350
Par value on preferred stock (in dollars per share)		$ 0.01
Series T Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		27,000
Shares Issued (in shares)		27,000
Shares Outstanding (in shares)		27,000
Depositary Shares Per Share (in shares)		25
Liquidation Preference (in dollars per share)		$ 25,000
Redemption Value ($ in millions)		$ 675
Par value on preferred stock (in dollars per share)		$ 0.01
Series U Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		30,000
Shares Issued (in shares)		30,000
Shares Outstanding (in shares)		30,000
Depositary Shares Per Share (in shares)		25
Liquidation Preference (in dollars per share)		$ 25,000
Redemption Value ($ in millions)		$ 750
Par value on preferred stock (in dollars per share)		$ 0.01
Series V Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		30,000
Shares Issued (in shares)		30,000
Shares Outstanding (in shares)		30,000
Depositary Shares Per Share (in shares)		25
Liquidation Preference (in dollars per share)		$ 25,000
Redemption Value ($ in millions)		$ 750
Par value on preferred stock (in dollars per share)		$ 0.01
Series W Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)		60,000
Shares Issued (in shares)		60,000
Shares Outstanding (in shares)		60,000
Depositary Shares Per Share (in shares)		25
Liquidation Preference (in dollars per share)		$ 25,000
Redemption Value ($ in millions)		$ 1,500
Shares issued (in shares)	60,000
Dividend rate	7.50%