v3.26.1
Shareholders' Equity - Summary of Perpetual Preferred Stock Issued and Outstanding (Detail) - USD ($)
$ / shares in Units, $ in Millions
Jul. 31, 2026
Jun. 30, 2026
Class of Stock [Line Items]    
Shares Authorized (in shares)   549,500
Shares Issued (in shares)   493,282
Shares Outstanding (in shares)   493,280
Redemption Value   $ 13,028
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   $ 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   $ 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   $ 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   $ 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   $ 161
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   $ 650
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   $ 750
Par value on preferred stock (in dollars per share)   $ 0.01
Series U Preferred Stock | Subsequent Event    
Class of Stock [Line Items]    
Redemption Value $ 750  
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   $ 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   $ 1,500
Par value on preferred stock (in dollars per share)   $ 0.01
Series X Preferred Stock    
Class of Stock [Line Items]    
Shares Authorized (in shares)   90,000
Shares Issued (in shares)   90,000
Shares Outstanding (in shares)   90,000
Depositary Shares Per Share (in shares)   25
Liquidation Preference (in dollars per share)   $ 25,000
Redemption Value   $ 2,250
Par value on preferred stock (in dollars per share)   $ 0.01
Series Y Preferred Stock    
Class of Stock [Line Items]    
Shares Authorized (in shares)   80,000
Shares Issued (in shares)   80,000
Shares Outstanding (in shares)   80,000
Depositary Shares Per Share (in shares)   25
Liquidation Preference (in dollars per share)   $ 25,000
Redemption Value   $ 2,000
Par value on preferred stock (in dollars per share)   $ 0.01
Series Z Preferred Stock    
Class of Stock [Line Items]    
Shares Authorized (in shares)   76,000
Shares Issued (in shares)   76,000
Shares Outstanding (in shares)   76,000
Depositary Shares Per Share (in shares)   25
Liquidation Preference (in dollars per share)   $ 25,000
Redemption Value   $ 1,900
Par value on preferred stock (in dollars per share)   $ 0.01
Series AA Preferred Stock | Subsequent Event    
Class of Stock [Line Items]    
Shares Issued (in shares) 100,000  
Depositary Shares Per Share (in shares) 25  
Liquidation Preference (in dollars per share) $ 25,000