| Document and Entity Information | Jan. 05, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | WILLIAMS COMPANIES, INC. |
| Amendment Flag | false |
| Entity Central Index Key | 0000107263 |
| Document Type | 8-K |
| Document Period End Date | Jan. 5, 2021 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 1-4174 |
| Entity Tax Identification Number | 73-0569878 |
| Entity Address, Address Line One | One Williams Center |
| Entity Address, City or Town | Tulsa |
| Entity Address, State or Province | OK |
| Entity Address, Postal Zip Code | 74172 |
| City Area Code | (918) |
| Local Phone Number | 573-2000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $1.00 par value |
| Trading Symbol | WMB |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
