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Equity and Distributions, Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  | $ (171.7) |  | $ (280.0) |
Other comprehensive income (loss) before reclassifications |  |  |  |  | (135.8) |  | (7.5) |
Reclassification of losses (gains) to net income |  |  |  |  | 0.2 |  | (19.1) |
Total other comprehensive income (loss) | $ (184.1) |  | $ (177.9) |  | (135.6) |  | (26.6) |
Ending balance | (307.3) |  | (306.6) |  | (307.3) |  | (306.6) |
Interest expense | 279.5 |  | 243.9 |  | 806.2 |  | 739.0 |
Revenue | (9,585.9) | [1] | (6,886.9) | [2] | (27,351.9) | [1] | (20,814.9) | [2]
Operating costs and expenses | 8,001.9 |  | 6,079.8 |  | 23,776.6 |  | 18,143.2 |
Total | (1,334.6) |  | (621.3) |  | (2,933.3) |  | (2,058.3) |
Gains (Losses) on Cash Flow Hedges [Member] | Interest Rate Derivatives [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  | (165.1) |  | (199.8) |
Other comprehensive income (loss) before reclassifications |  |  |  |  | 20.7 |  | (4.8) |
Reclassification of losses (gains) to net income |  |  |  |  | 29.0 |  | 29.9 |
Total other comprehensive income (loss) |  |  |  |  | 49.7 |  | 25.1 |
Ending balance | (115.4) |  | (174.7) |  | (115.4) |  | (174.7) |
Gains (Losses) on Cash Flow Hedges [Member] | Commodity Derivatives [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  | (10.1) |  | (83.8) |
Other comprehensive income (loss) before reclassifications |  |  |  |  | (156.0) |  | (2.6) |
Reclassification of losses (gains) to net income |  |  |  |  | (28.8) |  | (49.0) |
Total other comprehensive income (loss) |  |  |  |  | (184.8) |  | (51.6) |
Ending balance | (194.9) |  | (135.4) |  | (194.9) |  | (135.4) |
Other [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  | 3.5 |  | 3.6 |
Other comprehensive income (loss) before reclassifications |  |  |  |  | (0.5) |  | (0.1) |
Reclassification of losses (gains) to net income |  |  |  |  | 0.0 |  | 0.0 |
Total other comprehensive income (loss) |  |  |  |  | (0.5) |  | (0.1) |
Ending balance | 3.0 |  | 3.5 |  | 3.0 |  | 3.5 |
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |
Total | (44.4) |  | 0.2 |  | 0.2 |  | (19.1) |
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Gains (Losses) on Cash Flow Hedges [Member] | Interest Rate Derivatives [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |
Interest expense | 9.1 |  | 10.3 |  | 29.0 |  | 29.9 |
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Gains (Losses) on Cash Flow Hedges [Member] | Commodity Derivatives [Member] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |
Revenue | (53.9) |  | (10.6) |  | (28.5) |  | (49.1) |
Operating costs and expenses | $ 0.4 |  | $ 0.5 |  | $ (0.3) |  | $ 0.1 |
[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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