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Intangible Assets and Goodwill, Intangible Assets (Details) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

Sep. 30, 2015

Sep. 30, 2014

Sep. 30, 2015

Sep. 30, 2014

Dec. 31, 2014

Identifiable intangible assets [Abstract]

Gross Value

$ 5,274.3

$ 5,274.3

$ 5,548.4

Accumulated Amortization

(1,192.2)

(1,192.2)

(1,246.3)

Carrying Value

4,082.1

4,082.1

4,302.1

Amortization Expense

51.7

$ 23.5

129.2

$ 72.7

Forecasted amortization expense [Abstract]

Remainder of 2015

50.3

50.3

2016

218.8

218.8

2017

223.5

223.5

2018

220.4

220.4

2019

208.6

208.6

Oiltanking Partners L.P. - Step 1 [Member] | Incentive distribution rights [Member]

Identifiable intangible assets [Abstract]

Gross Value

1,460.0

Carrying Value

1,460.0

Eagle Ford Midstream Assets [Member] | Customer relationship intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

1,410.0

$ 1,410.0

Eagle Ford Midstream Assets [Member] | Customer relationship intangibles [Member] | Minimum [Member]

Identifiable intangible assets [Abstract]

Finite-Lived Intangible Asset, Useful Life

26 years

Eagle Ford Midstream Assets [Member] | Customer relationship intangibles [Member] | Maximum [Member]

Identifiable intangible assets [Abstract]

Finite-Lived Intangible Asset, Useful Life

29 years

NGL Pipelines & Services [Member]

Identifiable intangible assets [Abstract]

Gross Value

833.8

$ 833.8

1,051.1

Accumulated Amortization

(373.4)

(373.4)

(361.9)

Carrying Value

460.4

460.4

689.2

Amortization Expense

9.7

8.1

24.9

25.4

NGL Pipelines & Services [Member] | Customer relationship intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

550.8

550.8

340.8

Accumulated Amortization

(183.8)

(183.8)

(183.2)

Carrying Value

367.0

367.0

157.6

NGL Pipelines & Services [Member] | Contract-based intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

283.0

283.0

277.7

Accumulated Amortization

(189.6)

(189.6)

(178.7)

Carrying Value

93.4

93.4

99.0

NGL Pipelines & Services [Member] | Incentive distribution rights [Member]

Identifiable intangible assets [Abstract]

Gross Value

^[1]

0.0

0.0

432.6

Accumulated Amortization

^[1]

0.0

0.0

0.0

Carrying Value

^[1]

0.0

0.0

432.6

NGL Pipelines & Services [Member] | Eagle Ford Midstream Assets [Member] | Customer relationship intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

230.1

230.1

Crude Oil Pipelines & Services [Member]

Identifiable intangible assets [Abstract]

Gross Value

2,485.8

2,485.8

2,244.8

Accumulated Amortization

(83.5)

(83.5)

(21.2)

Carrying Value

2,402.3

2,402.3

2,223.6

Amortization Expense

29.0

0.3

62.3

0.9

Crude Oil Pipelines & Services [Member] | Customer relationship intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

2,204.4

2,204.4

1,108.0

Accumulated Amortization

(28.1)

(28.1)

(7.7)

Carrying Value

2,176.3

2,176.3

1,100.3

Crude Oil Pipelines & Services [Member] | Contract-based intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

281.4

281.4

281.4

Accumulated Amortization

(55.4)

(55.4)

(13.5)

Carrying Value

226.0

226.0

267.9

Crude Oil Pipelines & Services [Member] | Incentive distribution rights [Member]

Identifiable intangible assets [Abstract]

Gross Value

^[1]

0.0

0.0

855.4

Accumulated Amortization

^[1]

0.0

0.0

0.0

Carrying Value

^[1]

0.0

0.0

855.4

Crude Oil Pipelines & Services [Member] | Eagle Ford Midstream Assets [Member] | Customer relationship intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

1,100.0

1,100.0

Natural Gas Pipelines & Services [Member]

Identifiable intangible assets [Abstract]

Gross Value

1,712.9

1,712.9

1,629.6

Accumulated Amortization

(687.2)

(687.2)

(656.7)

Carrying Value

1,025.7

1,025.7

972.9

Amortization Expense

10.7

11.1

30.5

34.2

Natural Gas Pipelines & Services [Member] | Customer relationship intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

1,246.9

1,246.9

1,163.6

Accumulated Amortization

(327.8)

(327.8)

(308.9)

Carrying Value

919.1

919.1

854.7

Natural Gas Pipelines & Services [Member] | Contract-based intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

466.0

466.0

466.0

Accumulated Amortization

(359.4)

(359.4)

(347.8)

Carrying Value

106.6

106.6

118.2

Natural Gas Pipelines & Services [Member] | Eagle Ford Midstream Assets [Member] | Customer relationship intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

83.3

83.3

Petrochemical & Refined Products Services [Member]

Identifiable intangible assets [Abstract]

Gross Value

241.8

241.8

425.9

Accumulated Amortization

(48.1)

(48.1)

(51.1)

Carrying Value

193.7

193.7

374.8

Amortization Expense

2.3

1.5

7.0

4.6

Petrochemical & Refined Products Services [Member] | Customer relationship intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

185.5

185.5

198.4

Accumulated Amortization

(37.3)

(37.3)

(43.3)

Carrying Value

148.2

148.2

155.1

Petrochemical & Refined Products Services [Member] | Contract-based intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

56.3

56.3

56.3

Accumulated Amortization

(10.8)

(10.8)

(7.8)

Carrying Value

45.5

45.5

48.5

Petrochemical & Refined Products Services [Member] | Incentive distribution rights [Member]

Identifiable intangible assets [Abstract]

Gross Value

^[1]

0.0

0.0

171.2

Accumulated Amortization

^[1]

0.0

0.0

0.0

Carrying Value

^[1]

0.0

0.0

171.2

Offshore Pipelines & Services [Member]

Identifiable intangible assets [Abstract]

Gross Value

^[2]

0.0

0.0

197.0

Accumulated Amortization

^[2]

0.0

0.0

(155.4)

Carrying Value

^[2]

0.0

0.0

41.6

Amortization Expense

0.0

$ 2.5

4.5

$ 7.6

Offshore Pipelines & Services [Member] | Customer relationship intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

^[2]

0.0

0.0

195.8

Accumulated Amortization

^[2]

0.0

0.0

(154.9)

Carrying Value

^[2]

0.0

0.0

40.9

Offshore Pipelines & Services [Member] | Contract-based intangibles [Member]

Identifiable intangible assets [Abstract]

Gross Value

^[2]

0.0

0.0

1.2

Accumulated Amortization

^[2]

0.0

0.0

(0.5)

Carrying Value

^[2]

$ 0.0

$ 0.0

$ 0.7

[1]

At December 31, 2014, we had indefinite-lived intangible assets outstanding with a carrying value of $1.46 billion recorded in connection with our acquisition of the Oiltanking IDRs in October 2014. The IDRs represented contractual rights to future cash incentive distributions to be paid by Oiltanking. In February 2015 (following completion of Step 2 of the Oiltanking acquisition), the Oiltanking IDRs were cancelled and the carrying value of the IDRs were reclassified to goodwill.

[2]

Our intangible assets classified within the Offshore Pipelines & Services segment were sold to Genesis in July 2015 (see Note 6).

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