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Capital Accounts - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
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Feb. 13, 2026 | Mar. 27, 2024 | Feb. 16, 2024 | Sep. 30, 2020 | Dec. 31, 2025 | Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Oct. 31, 2025 | Dec. 31, 2022
Registration Statements and Equity Offerings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings under debt agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 88,281 | $ 53,715 | $ 89,899 |  |
Buyback Program: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchased and retired during period, (in units) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,496,536 | 7,556,210 | 7,244,540 |  |
Common units acquired in connection with buyback program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300 | $ 219 | $ 188 |  |
Proceeds from Issuance or Sale of Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common units issued in connection with the vesting of phantom unit awards, net (in units) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,346,387 | 4,990,360 | 4,662,539 |  |
Series A cumulative convertible preferred units outstanding (in units) |  |  |  | 50,000 | 45,412 |  |  |  | 50,687 |  |  |  | 50,412 |  |  |  | 45,412 | 50,687 | 50,412 |  | 50,412
Temporary equity, par or stated value per share (in dollars per unit) |  |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred unit distribution rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.25% |  |  |  |
Total distributions paid to convertible preferred unitholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4 | $ 4 |  |  |
Series A cumulative convertible preferred units, paid-in kind distribution (in units) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 291 | 275 |  |  |
Cash distributions paid to convertible preferred unitholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3 | $ 3 | $ 3 |  |
Redemption price per preferred unit on or after September 30, 2025 at unitholder election (in dollars per unit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 |  |  |  |
Percentage applied to the common unit market price in calculating the number of common units to be acquired upon the conversion of series A preferred units to common units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 92.50% |  |  |  |
Redemption price per preferred unit from September 30, 2025 through September 29, 2026 (in dollars per unit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,010 |  |  |  |
Redemption price per preferred unit on or after September 30, 2026 (in dollars per unit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000 |  |  |  |
Redemption price per preferred unit if Change of Control event occurs (in dollars per unit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,010 |  |  |  |
Percentage of preferred units that may be converted into common units at unitholder option |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |
Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 62 | 69 | 125 |  |
Payments to noncontrolling interests |  |  | $ 375 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | 400 | 10 |  |
Number of days after quarter end to distribute available cash |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 45 days |  |  |  |
Quarterly distribution per common unit (in units) |  |  |  |  | $ 0.5500 | $ 0.5450 | $ 0.5450 | $ 0.5350 | $ 0.5350 | $ 0.5250 | $ 0.5250 | $ 0.5150 | $ 0.5150 | $ 0.5000 | $ 0.5000 | $ 0.4900 |  |  |  |  |
Annualized distribution per common unit (in dollars per unit) |  |  |  |  | $ 2.20 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash payments made in connection with DERs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 44 | 43 | 38 |  |
Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registration Statements and Equity Offerings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings under debt agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,650 | $ 4,500 | $ 1,750 |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash distributions paid | $ 1,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash payments made in connection with DERs | $ 11 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Whitethorn Pipeline Company LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest acquired |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Enterprise EF78 LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest acquired |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Panola Pipeline Company, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest acquired |  | 15.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to noncontrolling interests |  | $ 25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, ownership percentage, parent |  | 70.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Partners' equity account, units, treasury units purchased (in units) |  |  |  | 54,807,352 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, preferred, shares (in units) |  |  |  | 855,915 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Phantom unit awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common units issued in connection with the vesting of phantom unit awards, net (in units) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,346,387 | 4,990,360 | 4,662,539 |  |
Cash payments made in connection with DERs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 44 | $ 43 | $ 38 |  |
2019 Buyback Program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Buyback Program: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase program, authorized, amount |  |  |  |  |  | $ 2,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000 |
Stock repurchased and retired during period, (in units) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,496,536 | 7,556,210 | 7,244,540 |  |
Common units acquired in connection with buyback program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300 | $ 219 | $ 188 |  |
Share repurchase program, remaining authorized, amount |  |  |  |  | $ 3,600 |  |  |  |  |  |  |  |  |  |  |  | 3,600 |  |  |  |
At-the-Market Registration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registration Statements and Equity Offerings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum common units authorized for issuance |  |  |  |  | 2,500 |  |  |  |  |  |  |  |  |  |  |  | 2,500 |  |  |  |
Limited partners capital account remaining units available for issuance in dollars |  |  |  |  | $ 2,500 |  |  |  |  |  |  |  |  |  |  |  | $ 2,500 |  |  |  |
Employee Unit Purchase Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Limited partners' capital account, units authorized (in units) |  |  |  |  | 23,000,000 |  |  |  |  |  |  |  |  |  |  |  | 23,000,000 |  |  |  |
Employer contribution to EUPP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4 | $ 3 | $ 3 |  |
Limited partners capital account remaining units available for issuance (in units) |  |  |  |  | 12,532,388 |  |  |  |  |  |  |  |  |  |  |  | 12,532,388 |  |  |  |
Distribution Reinvestment and Employee Unit Purchase Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common units purchased on the open market and delivered to participants (in units) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,684,726 | 6,538,068 | 6,560,588 |  |
Distribution Reinvestment Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Limited partners capital account remaining units available for issuance (in units) |  |  |  |  | 25,862,040 |  |  |  |  |  |  |  |  |  |  |  | 25,862,040 |  |  |  |

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