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Commitments and Contingencies, Contractual Obligations (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Scheduled maturities of debt obligations [Abstract] |  |
2013 | $ 1,546.6 |
2014 | 1,150.0 |
2015 | 1,300.0 |
2016 | 750.0 |
2017 | 800.0 |
Thereafter | 10,632.7 |
Total | 16,179.3 | 14,482.7
Estimated cash interest payments [Abstract] |  |
2013 | 840.4 |
2014 | 765.2 |
2015 | 706.2 |
2016 | 682.3 |
2017 | 668.1 |
Thereafter | 13,410.5 |
Total | 17,072.7 |
Operating lease obligations [Abstract] |  |
2013 | 51.3 |
2014 | 44.1 |
2015 | 42.8 |
2016 | 37.5 |
2017 | 33.3 |
Thereafter | 154.0 |
Total | 363.0 |
Natural Gas [Member] |  |
Estimated payment obligations: |  |
2013 | 911.8 |
2014 | 733.4 |
2015 | 667.2 |
2016 | 614.2 |
2017 | 338.7 |
Thereafter | 761.9 |
Total | 4,027.2 |
Underlying major volume commitments: |  |
2013 | 321,000,000,000,000 |
2014 | 260,000,000,000,000 |
2015 | 237,000,000,000,000 |
2016 | 220,000,000,000,000 |
2017 | 128,000,000,000,000 |
Thereafter | 276,000,000,000,000 |
Total | 1,442,000,000,000,000 |
NGLs [Member] |  |
Estimated payment obligations: |  |
2013 | 1,136.3 |
2014 | 447.1 |
2015 | 121.4 |
2016 | 0 |
2017 | 0 |
Thereafter | 0 |
Total | 1,704.8 |
Underlying major volume commitments: |  |
2013 | 27 |
2014 | 13 |
2015 | 4 |
2016 | 0 |
2017 | 0 |
Thereafter | 0 |
Total | 44 |
Crude Oil [Member] |  |
Estimated payment obligations: |  |
2013 | 386.1 |
2014 | 0 |
2015 | 0 |
2016 | 0 |
2017 | 0 |
Thereafter | 0 |
Total | 386.1 |
Underlying major volume commitments: |  |
2013 | 5 |
2014 | 0 |
2015 | 0 |
2016 | 0 |
2017 | 0 |
Thereafter | 0 |
Total | 5 |
Petrochemicals And Refined Products [Member] |  |
Estimated payment obligations: |  |
2013 | 1,519.7 |
2014 | 366.0 |
2015 | 119.1 |
2016 | 117.0 |
2017 | 0 |
Thereafter | 0 |
Total | 2,121.8 |
Underlying major volume commitments: |  |
2013 | 20 |
2014 | 5 |
2015 | 2 |
2016 | 2 |
2017 | 0 |
Thereafter | 0 |
Total | 29 |
Estimated Payment Obligations Other [Member] |  |
Estimated payment obligations: |  |
2013 | 83.9 |
2014 | 7.6 |
2015 | 7.2 |
2016 | 6.9 |
2017 | 6.3 |
Thereafter | 15.8 |
Total | 127.7 |
Service Payment Commitments [Member] |  |
Estimated payment obligations: |  |
2013 | 114.5 |
2014 | 97.2 |
2015 | 98.7 |
2016 | 91.9 |
2017 | 86.1 |
Thereafter | 257.1 |
Total | 745.5 |
Capital Expenditure Commitments [Member] |  |
Estimated payment obligations: |  |
2013 | 1,754.0 |
2014 | 0 |
2015 | 0 |
2016 | 0 |
2017 | 0 |
Thereafter | 0 |
Total | $ 1,754.0 |

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