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Property, Plant and Equipment, Other (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2015 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |
Capital expenditures |  |  | $ 1,880.4 | $ 1,638.0
Loss due to Pascagoula fire | $ 7.1 | $ 0.0 | 7.1 | $ 0.0
Insurance Matters [Abstract] |  |  |  |
Insurance deductible per incident | $ 55.0 |  | $ 55.0 |
Minimum business interruption period (in days) |  |  | 60 days |
Pascagoula Natural Gas Processing Facility [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Undivided ownership interest acquired (in hundredths) |  |  | 0.6 |
Capital expenditures |  |  | $ 35.0 |
Loss due to Pascagoula fire |  |  | $ 7.1 |

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