v3.25.2
Investments (Narrative) (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Feb. 29, 2024
Schedule of Equity Method Investments [Line Items]            
Earnings (loss) from equity method investees $ (1) [1] $ (1) [1] $ (8) [2] $ (1) [2]    
Net earnings (losses) from discontinued operations including noncontrolling interest [3] 1 97 0 215    
Distributions received from investment     3 134    
Equity method affiliates includes cash and accrued amounts of contributions     11 4    
Investment company received distribution amount           $ 126
Discontinued operations            
Schedule of Equity Method Investments [Line Items]            
Net earnings (losses) from discontinued operations including noncontrolling interest       (11)    
Atlantic Coast Pipeline            
Schedule of Equity Method Investments [Line Items]            
Earnings (loss) from equity method investees (1) $ (1) (2) (12)    
Atlantic Coast Pipeline | Other Current Liabilities            
Schedule of Equity Method Investments [Line Items]            
Current liabilities 4   4   $ 7  
Finite Lived Equity Method Investment Basis Difference            
Schedule of Equity Method Investments [Line Items]            
Carrying amount of investment that exceeded share of underlying equity 2   2   5  
Trading Securities            
Schedule of Equity Method Investments [Line Items]            
Rabbi trust securities $ 162   162   $ 160  
Maximum            
Schedule of Equity Method Investments [Line Items]            
Earnings (loss) from equity method investees       $ 1    
Maximum | Discontinued operations            
Schedule of Equity Method Investments [Line Items]            
Net earnings (losses) from discontinued operations including noncontrolling interest     $ (2)      
[1] Items designated are other segment items for each reportable segment.
[2] Items designated are other segment items for each reportable segment.
[3] Includes income tax expense (benefit) of $(3) million and $(14) million for the three months ended June 30, 2025 and 2024, respectively, and $(3) million and $40 million for the six months ended June 30, 2025 and 2024, respectively.