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Conservatorship, Senior Preferred Stock Purchase Agreement and Related Matters - Narrative (Details) - USD ($)
shares in Millions, $ in Millions
1 Months Ended 3 Months Ended
Sep. 30, 2008
Mar. 31, 2024
Dec. 31, 2023
Jun. 30, 2024
Related Parties [Line Items]        
Net worth   $ 82,000 $ 77,700  
Senior preferred stock liquidation preference   199,181 195,224  
Increase in net worth   $ 4,300 $ 4,000  
Series 2008-2 Senior Preferred Stock        
Related Parties [Line Items]        
Stock issued (in shares) 1      
Forecast        
Related Parties [Line Items]        
Senior preferred stock liquidation preference       $ 203,500
Related Party | Treasury        
Related Parties [Line Items]        
Percentage of common shares attributable to warrants   79.90%    
Aggregate funding received from US Treasury pursuant to the senior preferred stock purchase agreement   $ 119,800    
Total available funding from US Treasury pursuant to the senior preferred stock agreement   113,900    
Treasury        
Related Parties [Line Items]        
Aggregate liquidation preference of senior preferred stock   $ 199,200