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Accounting Changes and Error Corrections (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2024
Jun. 30, 2024
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Error Corrections and Prior Period Adjustments Restatement [Line Items]            
Net Cash Provided by (Used in) Operating Activities, Continuing Operations       $ 2,296 $ 1,809 $ 912
Cash provided by (used for) operating activities       2,145 1,769 872
Cash provided by (used for) investing activities       (589) (1,987) (632)
EIDP            
Error Corrections and Prior Period Adjustments Restatement [Line Items]            
Net Cash Provided by (Used in) Operating Activities, Continuing Operations $ (2,610) $ (2,008) $ (1,886) 2,338 1,768 879
Cash provided by (used for) operating activities (2,613) (2,167) (2,043) 2,187 1,728 839
Cash provided by (used for) investing activities (632) (1,028) (1,557) $ (228) (2,007) $ (632)
Revision of Prior Period, Error Correction, Adjustment | EIDP            
Error Corrections and Prior Period Adjustments Restatement [Line Items]            
Net Cash Provided by (Used in) Operating Activities, Continuing Operations 362 723 1,091   360  
Cash provided by (used for) operating activities 362 723 1,091   360  
Cash provided by (used for) investing activities (362) (723) (1,091)   (20)  
Previously Reported | EIDP            
Error Corrections and Prior Period Adjustments Restatement [Line Items]            
Net Cash Provided by (Used in) Operating Activities, Continuing Operations (2,972) (2,731) (2,977)   1,408  
Cash provided by (used for) operating activities (2,975) (2,890) (3,134)   1,368  
Cash provided by (used for) investing activities $ (270) $ (305) $ (466)   $ (1,987)