v3.26.1
Equity Equity (Preferred Stock Dividends) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Sep. 30, 2025
Dividends Payable [Line Items]      
Dividends, Preferred Stock, Cash $ 45 $ 66  
Series A Preferred Stock      
Dividends Payable [Line Items]      
Dividends, Preferred Stock, Cash $ 7 $ 9  
Preferred Stock, Dividends Per Share, Declared $ 0.315 $ 0.355  
Series D Preferred Stock      
Dividends Payable [Line Items]      
Dividends, Preferred Stock, Cash $ 15 $ 15  
Preferred Stock, Dividends Per Share, Declared $ 29.375 $ 29.375  
Series E Preferred Stock      
Dividends Payable [Line Items]      
Dividends, Preferred Stock, Cash $ 11 $ 11  
Preferred Stock, Dividends Per Share, Declared $ 351.563 $ 351.563  
Series F Preferred Stock [Member]      
Dividends Payable [Line Items]      
Dividends, Preferred Stock, Cash $ 12 $ 12  
Preferred Stock, Dividends Per Share, Declared $ 296.875 $ 296.875  
Series G Preferred Stock      
Dividends Payable [Line Items]      
Dividends, Preferred Stock, Cash $ 0 $ 19  
Preferred Stock, Dividends Per Share, Declared $ 0 $ 19.250  
Preferred Stock, Dividend Rate, Percentage     3.85%