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EQUITY (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 25, 2023 | Feb. 29, 2024 | Jan. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Aggregate amount of common shares available for issuance and sale under equity distribution agreement |  |  |  | $ 1,000,000,000 |  |
Cash, dividends |  |  |  | (1,800,000,000) | $ (1,700,000,000) | $ (1,700,000,000)
Dividends, preferred stock, cash |  |  |  | 1,100,000 | 1,100,000 | 1,100,000
Preferred stock dividends paid |  |  |  | $ 1,000,000 | $ 1,000,000 | $ 1,000,000
Issued Under Equity Agreement [Member] |  |  |  |  |  |
Common stock sold under equity distribution agreement (in shares) |  |  |  | 0 |  |
Magellan Acquisition |  |  |  |  |  |
ONEOK exchange ratio per Magellan unit (in shares) | 0.667 |  |  |  |  |
Cash consideration per Magellan unit (in dollars per share) | $ 25.00 |  |  |  |  |
Shares of ONEOK common stock issued (in shares) | 134,800,000 |  |  |  |  |
Equity consideration | $ 9,062,000,000 |  |  |  |  |
Magellan Acquisition | Common Stock |  |  |  |  |  |
Equity consideration | $ 8,969,000,000 |  |  |  |  |
Subsequent Event |  |  |  |  |  |
Share repurchase, authorized amount |  |  | $ 2,000,000,000 |  |  |
Stock repurchase program, period (in shares) |  |  | 4 years |  |  |
Common stock, dividends, declared (in dollars per share) |  | $ 0.99 |  |  |  |
Common stock, dividends, declared, annualized (in dollars per share) |  | $ 3.96 |  |  |  |
Preferred stock dividends paid |  | $ 300,000 |  |  |  |
Series A Preferred Stock |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  |  | 0 |  |
Series B Preferred Stock |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  |  | 0 |  |
Series E Preferred Stock |  |  |  |  |  |
Preferred stock, dividend rate (as a percent) |  |  |  | 5.50% |  |

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