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SHORT-TERM AND LONG-TERM DEBT - Summary of Short and Long-term Debt (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Total short-term debt $ 0 $ 0
Total long-term debt 3,833 3,833
Total short and long-term debt 3,833 3,833
Senior Notes | Senior Debenture due 2028    
Debt Instrument [Line Items]    
Total long-term debt 250 250
Senior Notes | Senior Note due 2028    
Debt Instrument [Line Items]    
Total long-term debt 995 1,494
Senior Notes | Senior Note due 2029    
Debt Instrument [Line Items]    
Total long-term debt 306 303
Senior Notes | Senior Note due 2033    
Debt Instrument [Line Items]    
Total long-term debt 497 497
Senior Notes | Senior Note due 2048    
Debt Instrument [Line Items]    
Total long-term debt 1,290 1,289
Junior Subordinated Debt | Junior Subordinated Debt Due 2055    
Debt Instrument [Line Items]    
Total long-term debt $ 495 $ 0