Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2022	Oct. 17, 2022	Aug. 08, 2022	May 16, 2022	Jan. 18, 2022	Dec. 31, 2021	Oct. 08, 2021	Mar. 02, 2021	May 14, 2020	May 08, 2020
Long-term Debt
Unamortized debt issuance costs	$ (135)					$ (131)
Net unamortized debt premium (discount)	(55)					(56)
Total long-term debt, including current portion	22,554					23,675
Long-term debt due within one year	(627)					(2,025)
Long-term debt	21,927					21,650
Transcontinental Gas Pipe Line Company, LLC [Member] | 7.08% Debentures Due 2026 [Member]
Long-term Debt
Long-term debt	$ 8					8
Long-term debt interest rate	7.08%
Transcontinental Gas Pipe Line Company, LLC [Member] | 7.25% Debentures Due 2026 [Member]
Long-term Debt
Long-term debt	$ 200					200
Long-term debt interest rate	7.25%
Transcontinental Gas Pipe Line Company, LLC [Member] | 7.85% Senior Unsecured Notes Due 2026 [Member]
Long-term Debt
Long-term debt	$ 1,000					1,000
Long-term debt interest rate	7.85%
Transcontinental Gas Pipe Line Company, LLC [Member] | 4% Senior Unsecured Notes Due 2028 [Member]
Long-term Debt
Long-term debt	$ 400					400
Long-term debt interest rate	4.00%
Transcontinental Gas Pipe Line Company, LLC [Member] | 3.25 Percent Senior Unsecured Notes Due 2030 [Member]
Long-term Debt
Long-term debt	$ 700					700
Long-term debt interest rate	3.25%									3.25%
Transcontinental Gas Pipe Line Company, LLC [Member] | 5.4% Senior Unsecured Notes Due 2041 [Member]
Long-term Debt
Long-term debt	$ 375					375
Long-term debt interest rate	5.40%
Transcontinental Gas Pipe Line Company, LLC [Member] | 4.45% Senior Unsecured Notes Due 2042 [Member]
Long-term Debt
Long-term debt	$ 400					400
Long-term debt interest rate	4.45%
Transcontinental Gas Pipe Line Company, LLC [Member] | 4.6% Senior Unsecured Notes Due 2048 [Member]
Long-term Debt
Long-term debt	$ 600					600
Long-term debt interest rate	4.60%
Transcontinental Gas Pipe Line Company, LLC [Member] | 3.95 Percent Senior Unsecured Notes Due 2050 [Member]
Long-term Debt
Long-term debt	$ 500					500
Long-term debt interest rate	3.95%									3.95%
Transcontinental Gas Pipe Line Company, LLC [Member] | Atlantic Sunrise [Member]
Long-term Debt
Other financing obligations	$ 809					830
Long-term debt interest rate	9.00%
Transcontinental Gas Pipe Line Company, LLC [Member] | Leidy South
Long-term Debt
Other financing obligations	$ 77					72
Long-term debt interest rate	13.00%
Transcontinental Gas Pipe Line Company, LLC [Member] | Dalton [Member]
Long-term Debt
Other financing obligations	$ 252					254
Long-term debt interest rate	9.00%
Northwest Pipeline LLC [Member] | 7.125% Debentures Due 2025 [Member]
Long-term Debt
Long-term debt	$ 85					85
Long-term debt interest rate	7.125%
Northwest Pipeline LLC [Member] | 4% Senior Unsecured Notes Due 2027 [Member]
Long-term Debt
Long-term debt	$ 500					500
Long-term debt interest rate	4.00%
The Williams Companies, Inc. [Member]
Long-term Debt
Credit facility loans	$ 0
The Williams Companies, Inc. [Member] | 3.35% Senior Unsecured Notes Due 2022 [Member]
Long-term Debt
Long-term debt	$ 0					750
Long-term debt interest rate	3.35%			3.35%
The Williams Companies, Inc. [Member] | 3.6% Senior Unsecured Notes Due 2022 [Member]
Long-term Debt
Long-term debt	$ 0					1,250
Long-term debt interest rate	3.60%				3.60%
The Williams Companies, Inc. [Member] | 3.7% Senior Unsecured Notes Due 2023 [Member]
Long-term Debt
Long-term debt	$ 0					850
Long-term debt interest rate	3.70%	3.70%
The Williams Companies, Inc. [Member] | 4.5% Senior Unsecured Notes Due 2023 [Member]
Long-term Debt
Long-term debt	$ 600					600
Long-term debt interest rate	4.50%
The Williams Companies, Inc. [Member] | 4.3% Senior Unsecured Notes Due 2024 [Member]
Long-term Debt
Long-term debt	$ 1,000					1,000
Long-term debt interest rate	4.30%
The Williams Companies, Inc. [Member] | 4.55% Senior Unsecured Notes Due 2024 [Member]
Long-term Debt
Long-term debt	$ 1,250					1,250
Long-term debt interest rate	4.55%
The Williams Companies, Inc. [Member] | 3.9% Senior Unsecured Notes Due 2025 [Member]
Long-term Debt
Long-term debt	$ 750					750
Long-term debt interest rate	3.90%
The Williams Companies, Inc. [Member] | 4% Senior Unsecured Notes Due 2025 [Member]
Long-term Debt
Long-term debt	$ 750					750
Long-term debt interest rate	4.00%
The Williams Companies, Inc. [Member] | 3.75% Senior Unsecured Notes Due 2027 [Member]
Long-term Debt
Long-term debt	$ 1,450					1,450
Long-term debt interest rate	3.75%
The Williams Companies, Inc. [Member] | 3.5 Percent Senior Unsecured Notes Due 2030 [Member]
Long-term Debt
Long-term debt	$ 1,000					1,000
Long-term debt interest rate	3.50%								3.50%
The Williams Companies, Inc. [Member] | 7.5% Debentures Due 2031 [Member]
Long-term Debt
Long-term debt	$ 339					339
Long-term debt interest rate	7.50%
The Williams Companies, Inc. [Member] | 7.75% Senior Unsecured Notes Due 2031 [Member]
Long-term Debt
Long-term debt	$ 252					252
Long-term debt interest rate	7.75%
The Williams Companies, Inc. [Member] | 8.75% Senior Unsecured Notes Due 2032 [Member]
Long-term Debt
Long-term debt	$ 445					445
Long-term debt interest rate	8.75%
The Williams Companies, Inc. [Member] | 6.3% Senior Unsecured Notes Due 2040 [Member]
Long-term Debt
Long-term debt	$ 1,250					1,250
Long-term debt interest rate	6.30%
The Williams Companies, Inc. [Member] | 5.8% Senior Unsecured Notes Due 2043 [Member]
Long-term Debt
Long-term debt	$ 400					400
Long-term debt interest rate	5.80%
The Williams Companies, Inc. [Member] | 5.4% Senior Unsecured Notes Due 2044 [Member]
Long-term Debt
Long-term debt	$ 500					500
Long-term debt interest rate	5.40%
The Williams Companies, Inc. [Member] | 5.75% Senior Unsecured Notes Due 2044 [Member]
Long-term Debt
Long-term debt	$ 650					650
Long-term debt interest rate	5.75%
The Williams Companies, Inc. [Member] | 4.9% Senior Unsecured Notes Due 2045 [Member]
Long-term Debt
Long-term debt	$ 500					500
Long-term debt interest rate	4.90%
The Williams Companies, Inc. [Member] | 5.1% Senior Unsecured Notes Due 2045 [Member]
Long-term Debt
Long-term debt	$ 1,000					1,000
Long-term debt interest rate	5.10%
The Williams Companies, Inc. [Member] | 4.85 Percent Senior Unsecured Notes Due 2048 [Member]
Long-term Debt
Long-term debt	$ 800					800
Long-term debt interest rate	4.85%
The Williams Companies, Inc. [Member] | 3.5 Percent Senior Unsecured Notes Due 2051
Long-term Debt
Long-term debt	$ 650					650
Long-term debt interest rate	3.50%						3.50%
The Williams Companies, Inc. [Member] | 2.6 Percent Senior Unsecured Notes Due 2031
Long-term Debt
Long-term debt	$ 1,500					1,500
Long-term debt interest rate	2.60%						2.60%	2.60%
The Williams Companies, Inc. [Member] | Various - 7.7% to 8.72% Notes due 2022 to 2027 [Member]
Long-term Debt
Long-term debt	$ 2					2
The Williams Companies, Inc. [Member] | Various - 7.7 to 8.72 Percent Notes Due 2022 to 2027 Minimum Interest Rate [Member]
Long-term Debt
Long-term debt interest rate	7.70%
The Williams Companies, Inc. [Member] | Various - 7.7% to 8.72% Notes Due 2022 to 2027 Maximum Interest Rate [Member]
Long-term Debt
Long-term debt interest rate	8.72%
The Williams Companies, Inc. [Member] | 4.65 Percent Senior Unsecured Notes Due 2032
Long-term Debt
Long-term debt	$ 1,000					0
Long-term debt interest rate	4.65%		4.65%
The Williams Companies, Inc. [Member] | 5.3 Percent Senior Unsecured Notes Due 2052
Long-term Debt
Long-term debt	$ 750					$ 0
Long-term debt interest rate	5.30%		5.30%