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Equity and Distributions, Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | $ (219.2) |  |  |  | $ (241.6) | $ (219.2) | $ (241.6) |
Other comprehensive income (loss) before reclassifications |  |  |  |  |  |  |  |  | (151.6) | 215.3 |
Amounts reclassified from accumulated other comprehensive (income) loss |  |  |  |  |  |  |  |  | 90.8 | (192.9) |
Total other comprehensive income (loss) |  |  |  |  |  |  |  |  | (60.8) | 22.4 | $ 117.4
Ending Balance | $ (280.0) |  |  |  | $ (219.2) |  |  |  | (280.0) | (219.2) | (241.6)
Interest expense |  |  |  |  |  |  |  |  | 982.6 | 961.8 | 921.0
Operating costs and expenses |  |  |  |  |  |  |  |  | 19,643.5 | 23,668.7 | 44,220.5
Total | (669.7) | $ (643.1) | $ (570.0) | (670.2) | (693.5) | $ (657.7) | $ (556.6) | (650.6) | (2,553.0) | (2,558.4) | (2,833.5)
Gains and Losses on Cash Flow Hedges [Member] | Commodity Derivatives [Member] |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 56.6 |  |  |  | 69.9 | 56.6 | 69.9 |
Other comprehensive income (loss) before reclassifications |  |  |  |  |  |  |  |  | (193.8) | 214.9 |
Amounts reclassified from accumulated other comprehensive (income) loss |  |  |  |  |  |  |  |  | 53.4 | (228.2) |
Total other comprehensive income (loss) |  |  |  |  |  |  |  |  | (140.4) | (13.3) |
Ending Balance | (83.8) |  |  |  | 56.6 |  |  |  | (83.8) | 56.6 | 69.9
Gains and Losses on Cash Flow Hedges [Member] | Interest Rate Derivatives [Member] |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | (279.5) |  |  |  | (314.8) | (279.5) | (314.8) |
Other comprehensive income (loss) before reclassifications |  |  |  |  |  |  |  |  | 42.3 | 0.0 |
Amounts reclassified from accumulated other comprehensive (income) loss |  |  |  |  |  |  |  |  | 37.4 | 35.3 |
Total other comprehensive income (loss) |  |  |  |  |  |  |  |  | 79.7 | 35.3 |
Ending Balance | (199.8) |  |  |  | (279.5) |  |  |  | (199.8) | (279.5) | (314.8)
Other [Member] |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | $ 3.7 |  |  |  | $ 3.3 | 3.7 | 3.3 |
Other comprehensive income (loss) before reclassifications |  |  |  |  |  |  |  |  | (0.1) | 0.4 |
Amounts reclassified from accumulated other comprehensive (income) loss |  |  |  |  |  |  |  |  | 0.0 | 0.0 |
Total other comprehensive income (loss) |  |  |  |  |  |  |  |  | (0.1) | 0.4 |
Ending Balance | $ 3.6 |  |  |  | $ 3.7 |  |  |  | 3.6 | 3.7 | $ 3.3
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | 90.8 | (192.9) |
Reclassification out of Accumulated Other Comprehensive Income [Member] | Commodity Derivatives [Member] |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 53.6 | (231.7) |
Operating costs and expenses |  |  |  |  |  |  |  |  | (0.2) | 3.5 |
Reclassification out of Accumulated Other Comprehensive Income [Member] | Interest Rate Derivatives [Member] |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | $ 37.4 | $ 35.3 |

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