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Acquisitions (Details) - USD ($)
$ in Millions
 1 Months Ended 6 Months Ended 8 Months Ended 9 Months Ended 11 Months Ended 12 Months Ended
Jan. 03, 2024
Dec. 31, 2023
Nov. 30, 2023
Feb. 14, 2023
Dec. 31, 2022
Aug. 31, 2022
Apr. 29, 2022
Jul. 01, 2021
Dec. 31, 2023
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2023
Dec. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Business Acquisition [Line Items]                                
Payments to Acquire Businesses, Net of Cash Acquired                           $ 1,568 $ 933 $ 151
Revenues                           10,907 10,965 10,627
Modified EBITDA Earnings Loss                           8,013 6,075 5,494
Goodwill   $ 463     $ 0       $ 463 $ 0 $ 0 $ 463 $ 463 463 0 0
Net income (loss) attributable to The Williams Companies, Inc.                           3,179 2,049 1,517
Payments to Acquire Productive Assets                           4,313 3,598 1,855
Pro Forma [Member]                                
Business Acquisition [Line Items]                                
Business Acquisition, Pro Forma Revenue                           11,414 11,493 10,933
Business Acquisition, Pro Forma Net Income (Loss)                           3,255 2,250 1,563
Product [Member]                                
Business Acquisition [Line Items]                                
Revenues                           2,779 4,556 4,536
Energy Commodities and Service                                
Business Acquisition [Line Items]                                
Revenues [1]                           956 (387) (148)
Gain (Loss) on Derivative Instruments | Energy Related Derivative | Not Designated as Hedging Instrument [Member]                                
Business Acquisition [Line Items]                                
Unrealized Gain (Loss) on Derivatives                           703 (296) (109)
Operating Segments [Member]                                
Business Acquisition [Line Items]                                
Modified EBITDA Earnings Loss                           7,172 5,641 5,316
Transmission And Gulf Of Mexico [Member]                                
Business Acquisition [Line Items]                                
Goodwill   400     0       400 0 0 400 400 400 0 0
Transmission And Gulf Of Mexico [Member] | NorTex Acquisition                                
Business Acquisition [Line Items]                                
Payments to Acquire Productive Assets           $ 424                    
Transmission And Gulf Of Mexico [Member] | Product [Member]                                
Business Acquisition [Line Items]                                
Revenues                           146 228 231
Transmission And Gulf Of Mexico [Member] | Operating Segments [Member]                                
Business Acquisition [Line Items]                                
Revenues                           4,150 4,047 3,786
Modified EBITDA Earnings Loss                           3,068 2,674 2,621
Payments to Acquire Productive Assets                           2,501 1,420 861
Transmission And Gulf Of Mexico [Member] | Operating Segments [Member] | Product [Member]                                
Business Acquisition [Line Items]                                
Revenues                           252 404 349
Transmission And Gulf Of Mexico [Member] | Operating Segments [Member] | Energy Commodities and Service                                
Business Acquisition [Line Items]                                
Revenues [1]                           2 0 0
West [Member]                                
Business Acquisition [Line Items]                                
Goodwill   63     0       63 0 $ 0 63 63 63 0 0
West [Member] | Product [Member]                                
Business Acquisition [Line Items]                                
Revenues                           80 145 60
West [Member] | Operating Segments [Member]                                
Business Acquisition [Line Items]                                
Revenues                           2,135 2,561 2,026
Modified EBITDA Earnings Loss                           1,238 1,211 961
Payments to Acquire Productive Assets                           1,186 1,507 209
West [Member] | Operating Segments [Member] | Product [Member]                                
Business Acquisition [Line Items]                                
Revenues                           441 841 643
West [Member] | Operating Segments [Member] | Energy Commodities and Service                                
Business Acquisition [Line Items]                                
Revenues [1]                           89 (4) (44)
Gas & NGL Marketing Services | Product [Member]                                
Business Acquisition [Line Items]                                
Revenues [2]                           2,382 4,052 4,094
Gas & NGL Marketing Services | Operating Segments [Member]                                
Business Acquisition [Line Items]                                
Revenues [2]                           2,878 3,233 4,211
Modified EBITDA Earnings Loss                           950 (40) 22
Payments to Acquire Productive Assets [2]                           7 4 1
Gas & NGL Marketing Services | Operating Segments [Member] | Product [Member]                                
Business Acquisition [Line Items]                                
Revenues [2]                           2,060 3,534 4,292
Gas & NGL Marketing Services | Operating Segments [Member] | Energy Commodities and Service                                
Business Acquisition [Line Items]                                
Revenues [1],[2]                           817 (304) (84)
Gulf Coast Storage Acquisition | Pro Forma [Member]                                
Business Acquisition [Line Items]                                
Business Acquisition, Pro Forma Revenue                           202    
Business Acquisition, Pro Forma Net Income (Loss)                           53    
Gulf Coast Storage Acquisition | Transmission And Gulf Of Mexico [Member] | Selling, general and administrative expenses [Member]                                
Business Acquisition [Line Items]                                
Business Combination, Acquisition Related Costs                           1    
Cureton Acquisition                                
Business Acquisition [Line Items]                                
Business Acquisition, Percentage of Voting Interests Acquired     100.00%                          
Business Combination, Consideration Transferred     $ 546                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents     2                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other     21                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment     437                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles     117                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets     4                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets     581                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other     (25)                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other     (16)                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities     (41)                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net     540                          
Goodwill     6                          
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net     $ 546                          
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life     20 years                          
Percentage Of Finite Lived Intangible Assets Impacted By Our Intent Or Ability To Renew Or Extend Arrangement     24.00%                          
Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension     10 years                          
Cureton Acquisition | West [Member] | Selling, general and administrative expenses [Member]                                
Business Acquisition [Line Items]                                
Business Combination, Acquisition Related Costs                           6    
Cureton Acquisition | West [Member] | Operating Segments [Member]                                
Business Acquisition [Line Items]                                
Revenues                 35              
Modified EBITDA Earnings Loss                 7              
RMM Acquisition                                
Business Acquisition [Line Items]                                
Business Combination, Consideration Transferred     $ 704                          
Business Combination, Consideration Transferred, Liabilities Incurred   $ 665     $ 0                      
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value     406                          
Gain on remeasurement of equity-method investment (Note 2)     30                     30 $ 0 0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents     28                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other     4                          
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Investments     20                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment     1,041                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles     61                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets     12                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets     1,166                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other     (44)                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other     (103)                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities     (147)                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net     1,019                          
Goodwill     57                          
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net     1,076                          
Business Acquisition, Goodwill, Expected Tax Deductible Amount     $ 57                          
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life     20 years                          
Percentage Of Finite Lived Intangible Assets Impacted By Our Intent Or Ability To Renew Or Extend Arrangement     18.00%                          
Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension     10 years                          
RMM Acquisition | West [Member] | Rocky Mountain Midstream Holdings LLC [Member]                                
Business Acquisition [Line Items]                                
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage         50.00%           50.00%       50.00%  
Business Acquisition, Percentage of Voting Interests Acquired     50.00%                          
RMM Acquisition | West [Member] | Operating Segments [Member]                                
Business Acquisition [Line Items]                                
Revenues                 53              
Modified EBITDA Earnings Loss                 $ 12              
DJ Basin Acquisitions | Pro Forma [Member]                                
Business Acquisition [Line Items]                                
Business Acquisition, Pro Forma Revenue                           270 [3] $ 218  
Business Acquisition, Pro Forma Net Income (Loss)                           17 [3] 13  
MountainWestAcquisition                                
Business Acquisition [Line Items]                                
Business Acquisition, Percentage of Voting Interests Acquired       100.00%                        
Business Combination, Consideration Transferred       $ 1,080                        
Business Combination, Consideration Transferred, Liabilities Incurred       430                        
Payments to Acquire Businesses, Net of Cash Acquired                           1,024    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Receivables                       19        
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment                       (73)        
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities                       $ (60)        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents       23                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables       33                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other       26                        
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Investments       20                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment       1,019                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets       33                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets       1,154                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other       (47)                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt       (365)                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other       (95)                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities       (507)                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net       647                        
Goodwill       400                        
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net       1,047                        
Business Acquisition, Goodwill, Expected Tax Deductible Amount       $ 400                        
MountainWestAcquisition | Pro Forma [Member]                                
Business Acquisition [Line Items]                                
Business Acquisition, Pro Forma Revenue                           35 [3] 265  
Business Acquisition, Pro Forma Net Income (Loss)                           6 [3] 170  
MountainWestAcquisition | Transmission And Gulf Of Mexico [Member]                                
Business Acquisition [Line Items]                                
Business Combination, Transition Related Costs                         27      
MountainWestAcquisition | Transmission And Gulf Of Mexico [Member] | Selling, general and administrative expenses [Member]                                
Business Acquisition [Line Items]                                
Business Combination, Acquisition Related Costs                           $ 16    
MountainWestAcquisition | Transmission And Gulf Of Mexico [Member] | Operating Segments [Member]                                
Business Acquisition [Line Items]                                
Revenues                         225      
Modified EBITDA Earnings Loss                         $ 122      
Trace Midstream Acquisition                                
Business Acquisition [Line Items]                                
Business Acquisition, Percentage of Voting Interests Acquired             100.00%                  
Business Combination, Consideration Transferred             $ 972                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents             39                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables             18                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment             448                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles             472                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets             20                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets             997                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable             (12)                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other             (5)                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other             (8)                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities             (25)                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net             $ 972                  
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life             20 years                  
Percentage Of Finite Lived Intangible Assets Impacted By Our Intent Or Ability To Renew Or Extend Arrangement             2.00%                  
Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension             19 years                  
Trace Midstream Acquisition | Pro Forma [Member]                                
Business Acquisition [Line Items]                                
Business Acquisition, Pro Forma Revenue                             45 [3] 118
Business Acquisition, Pro Forma Net Income (Loss)                             $ 18 [3] 42
Trace Midstream Acquisition | West [Member] | Selling, general and administrative expenses [Member]                                
Business Acquisition [Line Items]                                
Business Combination, Acquisition Related Costs                     $ 8          
Trace Midstream Acquisition | West [Member] | Operating Segments [Member]                                
Business Acquisition [Line Items]                                
Revenues                     148          
Modified EBITDA Earnings Loss                     $ 73          
Sequent Acquisition                                
Business Acquisition [Line Items]                                
Business Acquisition, Percentage of Voting Interests Acquired               100.00%                
Business Combination, Consideration Transferred               $ 159                
Business Combination Working Capital Acquired               109                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents               8                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables               498                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory               121                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other               4                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment               5                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles               306                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets               3                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets               1,051                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable               (514)                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other               (46)                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other               (1)                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities               (892)                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net               $ 159                
Sequent Acquisition | Pro Forma [Member]                                
Business Acquisition [Line Items]                                
Business Acquisition, Pro Forma Revenue [3]                               188
Business Acquisition, Pro Forma Net Income (Loss) [3]                               $ 4
Sequent Acquisition | Minimum [Member]                                
Business Acquisition [Line Items]                                
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life               1 year                
Sequent Acquisition | Maximum [Member]                                
Business Acquisition [Line Items]                                
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life               8 years                
Sequent Acquisition | Derivative                                
Business Acquisition [Line Items]                                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other               $ 57                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets               49                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other               (116)                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other               $ (215)                
Sequent Acquisition | Gas & NGL Marketing Services | Energy Commodities and Service                                
Business Acquisition [Line Items]                                
Revenues                   (43)            
Sequent Acquisition | Gas & NGL Marketing Services | Selling, general and administrative expenses [Member]                                
Business Acquisition [Line Items]                                
Business Combination, Acquisition Related Costs                   5            
Sequent Acquisition | Gas & NGL Marketing Services | Gain (Loss) on Derivative Instruments | Energy Related Derivative | Not Designated as Hedging Instrument [Member]                                
Business Acquisition [Line Items]                                
Unrealized Gain (Loss) on Derivatives                   (109)            
Sequent Acquisition | Gas & NGL Marketing Services | Operating Segments [Member]                                
Business Acquisition [Line Items]                                
Modified EBITDA Earnings Loss                   (112)            
Sequent Acquisition | Gas & NGL Marketing Services | Operating Segments [Member] | Product [Member]                                
Business Acquisition [Line Items]                                
Revenues                   (43)            
Affiliate Costs                   $ 80            
Subsequent Event [Member] | Gulf Coast Storage Acquisition                                
Business Acquisition [Line Items]                                
Business Acquisition, Percentage of Voting Interests Acquired 100.00%                              
Business Combination, Consideration Transferred $ 1,950                              
Business Combination, Consideration Transferred, Liabilities Incurred 100                              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents 46                              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other 18                              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 2,042                              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets 2                              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets 2,108                              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other (10)                              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other (107)                              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities (117)                              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net $ 1,991                              
[1] We record transactions that qualify as commodity derivatives at fair value with changes in fair value recognized in earnings in the period of change and characterized as unrealized gains or losses. Gains and losses from commodity derivatives held for energy trading purposes are presented on a net basis in revenue.
[2] As we are acting as agent for natural gas marketing customers or engage in energy trading activities, the resulting revenues are presented net of the related costs of those activities.
[3] Excludes results from operations acquired in the acquisition for the period beginning on the acquisition date, as these results are included in the amounts as reported.