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Intangible Assets and Goodwill (Details) (USD $)
In Millions
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Dec. 31, 2010
Identifiable intangible assets [Abstract]     
Gross Value$ 2,642.2 $ 2,642.2 $ 2,774.0
Accum. Amort.(955.6) (955.6) (932.3)
Carrying Value1,686.6 1,686.6 1,841.7
Amortization Expense37.036.4112.1100.1 
Forecasted amortization expense [Abstract]     
Remainder of 2011  33.4  
2012  130.3  
2013  126.2  
2014  125.1  
2015  122.2  
Changes in carrying amount of goodwill [Roll Forward]     
Balance at December 31, 2010  2,107.7[1]  
Goodwill adjustment  (0.6)[2]  
Reclassification of Crystal goodwill to assets held for sale  (14.8)[3]  
Balance at September 30, 20112,092.3[1] 2,092.3[1]  
Accumulated impairment charges1.3 1.3 1.3
NGL Pipelines and Services [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value634.5 634.5 663.0
Accum. Amort.(287.3) (287.3) (283.3)
Carrying Value347.2 347.2 379.7
Amortization Expense10.310.430.729.8 
Changes in carrying amount of goodwill [Roll Forward]     
Balance at December 31, 2010  341.2[1]  
Goodwill adjustment  0[2]  
Reclassification of Crystal goodwill to assets held for sale  0[3]  
Balance at September 30, 2011341.2[1] 341.2[1]  
NGL Pipelines and Services [Member] | Customer relationship intangibles [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value340.8 340.8 340.8
Accum. Amort.(122.9) (122.9) (106.7)
Carrying Value217.9 217.9 234.1
NGL Pipelines and Services [Member] | Contract-based intangibles [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value293.7[4] 293.7[4] 322.2[4]
Accum. Amort.(164.4)[4] (164.4)[4] (176.6)[4]
Carrying Value129.3[4] 129.3[4] 145.6[4]
Onshore Natural Gas Pipelines And Services [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value1,628.4 1,628.4 1,728.9
Accum. Amort.(483.1) (483.1) (482.8)
Carrying Value1,145.3 1,145.3 1,246.1
Amortization Expense19.520.159.652.4 
Changes in carrying amount of goodwill [Roll Forward]     
Balance at December 31, 2010  311.1[1]  
Goodwill adjustment  0[2]  
Reclassification of Crystal goodwill to assets held for sale  (14.8)[3]  
Balance at September 30, 2011296.3[1] 296.3[1]  
Onshore Natural Gas Pipelines And Services [Member] | Customer relationship intangibles [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value1,163.6 1,163.6 1,163.6
Accum. Amort.(197.9) (197.9) (160.8)
Carrying Value965.7 965.7 1,002.8
Onshore Natural Gas Pipelines And Services [Member] | Contract-based intangibles [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value464.8[5] 464.8[5] 565.3[5]
Accum. Amort.(285.2)[5] (285.2)[5] (322.0)[5]
Carrying Value179.6[5] 179.6[5] 243.3[5]
Onshore Crude Oil Pipelines and Services [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value10.1 10.1 10.1
Accum. Amort.(4.2) (4.2) (3.9)
Carrying Value5.9 5.9 6.2
Amortization Expense0.10.10.30.3 
Changes in carrying amount of goodwill [Roll Forward]     
Balance at December 31, 2010  311.2[1]  
Goodwill adjustment  0[2]  
Reclassification of Crystal goodwill to assets held for sale  0[3]  
Balance at September 30, 2011311.2[1] 311.2[1]  
Onshore Crude Oil Pipelines and Services [Member] | Customer relationship intangibles [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value9.7 9.7 9.7
Accum. Amort.(4.0) (4.0) (3.7)
Carrying Value5.7 5.7 6.0
Onshore Crude Oil Pipelines and Services [Member] | Contract-based intangibles [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value0.4 0.4 0.4
Accum. Amort.(0.2) (0.2) (0.2)
Carrying Value0.2 0.2 0.2
Offshore Pipelines And Services [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value207.0 207.0 207.0
Accum. Amort.(126.9) (126.9) (118.3)
Carrying Value80.1 80.1 88.7
Amortization Expense2.83.18.69.7 
Changes in carrying amount of goodwill [Roll Forward]     
Balance at December 31, 2010  82.1[1]  
Goodwill adjustment  0[2]  
Reclassification of Crystal goodwill to assets held for sale  0[3]  
Balance at September 30, 201182.1[1] 82.1[1]  
Offshore Pipelines And Services [Member] | Customer relationship intangibles [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value205.8 205.8 205.8
Accum. Amort.(126.6) (126.6) (118.1)
Carrying Value79.2 79.2 87.7
Offshore Pipelines And Services [Member] | Contract-based intangibles [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value1.2 1.2 1.2
Accum. Amort.(0.3) (0.3) (0.2)
Carrying Value0.9 0.9 1.0
Petrochemical and Refined Products Services [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value162.2 162.2 165.0
Accum. Amort.(54.1) (54.1) (44.0)
Carrying Value108.1 108.1 121.0
Amortization Expense4.32.712.97.9 
Changes in carrying amount of goodwill [Roll Forward]     
Balance at December 31, 2010  1,062.1[1]  
Goodwill adjustment  (0.6)[2]  
Reclassification of Crystal goodwill to assets held for sale  0[3]  
Balance at September 30, 20111,061.5[1] 1,061.5[1]  
Petrochemical and Refined Products Services [Member] | Customer relationship intangibles [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value104.4 104.4 104.7
Accum. Amort.(27.3) (27.3) (23.8)
Carrying Value77.1 77.1 80.9
Petrochemical and Refined Products Services [Member] | Contract-based intangibles [Member]
     
Identifiable intangible assets [Abstract]     
Gross Value57.8 57.8 60.3
Accum. Amort.(26.8) (26.8) (20.2)
Carrying Value31.0 31.0 40.1
Customer relationship intangibles [Member]
     
Identifiable intangible assets [Abstract]     
Carrying Value1,350.0 1,350.0  
Contract-based intangibles [Member]
     
Identifiable intangible assets [Abstract]     
Carrying Value$ 341.0 $ 341.0  
[1]The total carrying amount of goodwill at September 30, 2011 and December 31, 2010 is presented net of $1.3 million of accumulated impairment charges.
[2]The goodwill we recorded in connection with a marine business acquisition completed in November 2010 was subsequently reduced by $0.6 million in May 2011 due to a purchase price adjustment.
[3]See Note 6 for information related to the reclassification of Petal and Hattiesburg's goodwill to assets held for sale.
[4]In March 2011, we sold a non-strategic fractionation facility and its related contract-based intangible assets.
[5]The intangible assets of Petal and Hattiesburg have been reclassified to assets held for sale as of September 30, 2011. See Note 6 for additional information regarding Petal and Hattiesburg's assets held for sale.