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Credit Facility and Commercial Paper (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Credit Facility and Commercial Paper [Line Items]    
Commercial paper, outstanding $ 0 $ 725
Williams Companies Inc [Member]    
Credit Facility and Commercial Paper [Line Items]    
Credit facility, capacity [1] 3,750  
Credit facility, loans outstanding [1] 0  
Williams Companies Inc [Member] | Commercial paper [Member]    
Credit Facility and Commercial Paper [Line Items]    
Credit facility, capacity 3,500  
Commercial paper, outstanding 0  
Williams Companies Inc [Member] | Letters Of Credit Under Certain Bilateral Bank Agreements [Member]    
Credit Facility and Commercial Paper [Line Items]    
Credit facility, letters of credit outstanding $ 12  
[1] In managing our available liquidity, we do not expect a maximum outstanding amount in excess of the capacity of our credit facility inclusive of any outstanding amounts under our commercial paper program.