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Equity and Distributions, Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Beginning Balance |  |  |  | $ (171.7) |  |  |  | $ (280.0) | $ (171.7) |  | $ (280.0) |  |  |
Other comprehensive income (loss) for period, before reclassifications |  |  |  |  |  |  |  |  | 314.9 |  | (44.3) |  |  |
Reclassification of losses (gains) to net income during period |  |  |  |  |  |  |  |  | (92.3) |  | 152.6 |  |  |
Total other comprehensive income (loss) for period |  |  |  |  |  |  |  |  | 222.6 |  | 108.3 |  | $ (60.8) |
Accumulated Other Comprehensive Income (Loss), Ending balance | $ 50.9 |  |  |  | $ (171.7) |  |  |  | 50.9 |  | (171.7) |  | (280.0) |
Interest expense |  |  |  |  |  |  |  |  | 1,096.7 |  | 984.6 |  | 982.6 |
Revenue | (9,182.3) | $ (9,585.9) | $ (8,467.5) | (9,298.5) | (8,426.6) | $ (6,886.9) | $ (6,607.6) | (7,320.4) | (36,534.2) | [1] | (29,241.5) | [2] | (23,022.3) | [2]
Operating costs and expenses |  |  |  |  |  |  |  |  | 31,397.3 |  | 25,557.5 |  | 19,643.5 |
Total | (1,305.2) | $ (1,334.6) | $ (687.2) | (911.5) | (797.3) | $ (621.3) | $ (666.0) | (771.0) | (4,238.5) |  | (2,855.6) |  | (2,553.0) |
Cash Flow Hedges [Member] | Commodity Derivatives [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Beginning Balance |  |  |  | (10.1) |  |  |  | (83.8) | (10.1) |  | (83.8) |  |  |
Other comprehensive income (loss) for period, before reclassifications |  |  |  |  |  |  |  |  | 293.2 |  | (38.5) |  |  |
Reclassification of losses (gains) to net income during period |  |  |  |  |  |  |  |  | (130.4) |  | 112.2 |  |  |
Total other comprehensive income (loss) for period |  |  |  |  |  |  |  |  | 162.8 |  | 73.7 |  |  |
Accumulated Other Comprehensive Income (Loss), Ending balance | 152.7 |  |  |  | (10.1) |  |  |  | 152.7 |  | (10.1) |  | (83.8) |
Cash Flow Hedges [Member] | Interest Rate Derivatives [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Beginning Balance |  |  |  | (165.1) |  |  |  | (199.8) | (165.1) |  | (199.8) |  |  |
Other comprehensive income (loss) for period, before reclassifications |  |  |  |  |  |  |  |  | 22.2 |  | (5.7) |  |  |
Reclassification of losses (gains) to net income during period |  |  |  |  |  |  |  |  | 38.1 |  | 40.4 |  |  |
Total other comprehensive income (loss) for period |  |  |  |  |  |  |  |  | 60.3 |  | 34.7 |  |  |
Accumulated Other Comprehensive Income (Loss), Ending balance | (104.8) |  |  |  | (165.1) |  |  |  | (104.8) |  | (165.1) |  | (199.8) |
Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Beginning Balance |  |  |  | $ 3.5 |  |  |  | $ 3.6 | 3.5 |  | 3.6 |  |  |
Other comprehensive income (loss) for period, before reclassifications |  |  |  |  |  |  |  |  | (0.5) |  | (0.1) |  |  |
Reclassification of losses (gains) to net income during period |  |  |  |  |  |  |  |  | 0.0 |  | 0.0 |  |  |
Total other comprehensive income (loss) for period |  |  |  |  |  |  |  |  | (0.5) |  | (0.1) |  |  |
Accumulated Other Comprehensive Income (Loss), Ending balance | $ 3.0 |  |  |  | $ 3.5 |  |  |  | 3.0 |  | 3.5 |  | $ 3.6 |
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Cash Flow Hedges [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | (92.3) |  | 152.6 |  |  |
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Cash Flow Hedges [Member] | Commodity Derivatives [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | (131.7) |  | 111.6 |  |  |
Operating costs and expenses |  |  |  |  |  |  |  |  | 1.3 |  | 0.6 |  |  |
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Cash Flow Hedges [Member] | Interest Rate Derivatives [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | $ 38.1 |  | $ 40.4 |  |  |
[1] | Revenues are accounted for under ASC 606 upon implementation at January 1, 2018.
[2] | Revenues are accounted for under ASC 605 for historical periods prior to January 1, 2018.

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