v3.26.1
Stockholders' Equity - Preferred Stock Outstanding (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
May 18, 2025
Mar. 31, 2026
Dec. 31, 2025
Class of Stock [Line Items]      
Carrying Value (in millions)   $ 5,407 $ 5,407
Series I      
Class of Stock [Line Items]      
Per Annum Dividend Rate   5.00%  
Liquidation Preference per Share (in dollars per share)   $ 1,000  
Total Shares Outstanding (in shares)   1,500,000  
Carrying Value (in millions)   $ 1,462 1,462
Series J      
Class of Stock [Line Items]      
Per Annum Dividend Rate   4.80%  
Liquidation Preference per Share (in dollars per share)   $ 1,000  
Total Shares Outstanding (in shares)   1,250,000  
Carrying Value (in millions)   $ 1,209 1,209
Series K      
Class of Stock [Line Items]      
Per Annum Dividend Rate   4.625%  
Liquidation Preference per Share (in dollars per share)   $ 1,000  
Total Shares Outstanding (in shares)   125,000  
Carrying Value (in millions)   $ 122 122
Series L      
Class of Stock [Line Items]      
Per Annum Dividend Rate   4.375%  
Liquidation Preference per Share (in dollars per share)   $ 1,000  
Total Shares Outstanding (in shares)   675,000  
Carrying Value (in millions)   $ 652 652
Series M      
Class of Stock [Line Items]      
Liquidation Preference per Share (in dollars per share)   $ 1,000  
Total Shares Outstanding (in shares)   1,000,000  
Carrying Value (in millions)   $ 988 988
Series M | Maximum      
Class of Stock [Line Items]      
Per Annum Dividend Rate   3.95%  
Series M | Minimum      
Class of Stock [Line Items]      
Per Annum Dividend Rate   3.157%  
Series N      
Class of Stock [Line Items]      
Per Annum Dividend Rate   4.25%  
Liquidation Preference per Share (in dollars per share)   $ 1,000  
Total Shares Outstanding (in shares)   425,000  
Carrying Value (in millions)   $ 412 412
Series O      
Class of Stock [Line Items]      
Liquidation Preference per Share (in dollars per share)   $ 100,000  
Total Shares Outstanding (in shares)   5,700  
Carrying Value (in millions)   $ 562 $ 562
Series O | Discover      
Class of Stock [Line Items]      
Per Annum Dividend Rate 5.50%    
Preferred stock, dividend rate, basis spread on variable rate 0.03338