Long-Term Debt Issuances and Retirements (Details) - The Williams Companies, Inc. [Member] - USD ($) $ in Millions	Jan. 15, 2025	Jun. 30, 2025	Jan. 09, 2025
4.625 Percent Senior Unsecured Notes Due 2030 [Member]
Debt Instrument [Line Items]
Long-term debt face amount		$ 750
Long-term debt interest rate		4.625%
5.3 Percent Senior Unsecured Notes Due 2035 [Member]
Debt Instrument [Line Items]
Long-term debt face amount		$ 750
Long-term debt interest rate		5.30%
5.6 Percent Senior Unsecured Notes Due 2035
Debt Instrument [Line Items]
Long-term debt face amount			$ 1,000
Long-term debt interest rate			5.60%
6.0 Percent Senior Unsecured Notes Due 2055
Debt Instrument [Line Items]
Long-term debt face amount			$ 500
Long-term debt interest rate			6.00%
3.9% Senior Unsecured Notes Due 2025 [Member]
Debt Instrument [Line Items]
Long-term debt interest rate	3.90%
Extinguishment of Debt, Amount	$ 750