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Capital Accounts, Redeemable Preferred Limited Partner Interests (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Temporary Equity [Line Items] |  |  |  |  |
Treasury units |  | $ 1,297.3 | $ 1,297.3 | $ 1,297.3 |
Series A cumulative convertible preferred units (in dollars per unit) |  | $ 1,000 | $ 1,000 | $ 1,000 |
Series A cumulative convertible preferred units outstanding (in units) | 50,000 | 50,138 | 50,412 | 50,138 |
Cash proceeds from the issuance of preferred units | $ 32.5 |  | $ 0.0 | $ 31.5 | $ 0.0
Common units exchanged for preferred units, with common units received being immediately cancelled | 17.5 |  |  | 17.5 |
Total offering price for redeemable noncontrolling interests | $ 50.0 |  |  |  |
Offering expenses |  |  |  | 1.0 |
Total distributions paid to convertible preferred unitholders |  |  | 3.6 | 0.5 |
Cash distributions paid to convertible preferred unitholders |  |  | $ 3.4 | $ 0.3 |
Preferred unit distribution rate |  |  | 7.25% |  |
Redemption price per preferred unit on or after September 30, 2025 at unitholder election (in dollars per unit) |  |  | $ 1,000 |  |
Redemption price per preferred unit from September 30, 2020 through September 29, 2022 (in dollars per unit) |  |  | 1,100 |  |
Redemption price per preferred unit from September 30, 2022 through September 29, 2024 (in dollars per unit) |  |  | 1,070 |  |
Redemption price per preferred unit from September 30, 2024 through September 29, 2025 (in dollars per unit) |  |  | 1,030 |  |
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 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% |  |
Percentage of preferred units that may be converted into common units at unitholder option |  |  | 50.00% |  |
EPCO and its privately held affiliates [Member] |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |
Series A cumulative convertible preferred units issued (in units) | 15,000 |  |  |  |
Series A cumulative convertible preferred units, paid-in kind distribution (in units) |  | 138 | 274 |  |
Cash proceeds from the issuance of preferred units | $ 15.0 |  |  |  |
Preferred Units [Member] |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |
Treasury units outstanding (preferred units) (in units) | 855,915 |  |  |  |
Common Units [Member] |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |
Common units exchanged for preferred units in September 2020, with the common units received being immediately cancelled (in units) |  |  |  | 1,120,588 |

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