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Shareholders' Equity - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Oct. 15, 2025
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Class of Stock [Line Items]            
Remaining authorized repurchase amount   $ 661   $ 661    
Common stock acquired - share repurchase (in shares)       1,127,396   8,600,000
Payment for share repurchases   $ 100 $ 172 $ 100 $ 520  
Preferred Stock, shares authorized (in shares)   100,000,000   100,000,000   100,000,000
Preferred Stock, amount of preferred dividends in arrears       $ 0    
Subsequent Event            
Class of Stock [Line Items]            
Common stock acquired - share repurchase (in shares) 218,336