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v3.19.3

Derivative Instruments, Hedging Activities and Fair Value Measurements (Details) bbl in Millions, $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 USD ($) Contract bbl Bcf | Sep. 30, 2019 USD ($) Contract bbl Bcf | Dec. 31, 2018 USD ($)
Derivative [Line Items] |  |  |  |
Gain on the sale of swaption | $ |  | $ 13.3 | $ 23.1 |
Carrying amount of hedged asset | $ |  | 21.1 | 21.1 | $ 50.2
Forward Starting Swaps [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Notional Amount | $ |  | $ 1,150.0 | $ 1,150.0 |
Average Rate Locked |  | 2.16% | 2.16% |
Life of associated future debt |  |  | 30 years |
Forward Starting Swaps A [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Number of Derivatives Outstanding | Contract | [1] | 1 | 1 |
Notional Amount | $ |  | $ 75.0 | $ 75.0 |
Average Rate Locked |  | 2.39% | 2.39% |
Forward Starting Swaps B [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Number of Derivatives Outstanding | Contract | [1] | 1 | 1 |
Notional Amount | $ |  | $ 75.0 | $ 75.0 |
Average Rate Locked |  | 2.41% | 2.41% |
Forward Starting Swaps - September 2019 [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Number of Derivatives Outstanding | Contract |  | 10 | 10 |
Notional Amount | $ |  | $ 1,000.0 | $ 1,000.0 |
Average Rate Locked |  | 2.12% | 2.12% |
Difference between forward-starting swaps' weighted-average fixed interest rate and applicable weighted-average variable interest rate |  | 0.41% | 0.41% |
Life of associated future debt |  |  | 30 years |
Forward Starting Swap C [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Number of Derivatives Outstanding | Contract | [2] | 5 | 5 |
Notional Amount | $ |  | $ 500.0 | $ 500.0 |
Average Rate Locked |  | 2.12% | 2.12% |
Forward Starting Swaps D [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Number of Derivatives Outstanding | Contract | [2] | 5 | 5 |
Notional Amount | $ |  | $ 500.0 | $ 500.0 |
Average Rate Locked |  | 2.13% | 2.13% |
Designated as Hedging Instrument [Member] | Natural gas processing: Forecasted natural gas purchases for plant thermal reduction (PTR) [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | Bcf | [3],[4] | 15.2 | 15.2 |
Designated as Hedging Instrument [Member] | Natural gas processing: Forecasted sales of NGLs [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4] | 1.8 | 1.8 |
Designated as Hedging Instrument [Member] | Octane enhancement: Forecasted purchases of NGLs [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4] | 1.0 | 1.0 |
Designated as Hedging Instrument [Member] | Octane enhancement: Forecasted sales of octane enhancement products [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4] | 8.1 | 8.1 |
Long Term Volume | [3],[4] | 1.6 | 1.6 |
Designated as Hedging Instrument [Member] | Natural gas marketing: Natural gas storage inventory management activities [Member] | Derivatives in fair value hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | Bcf | [3],[4] | 3.2 | 3.2 |
Designated as Hedging Instrument [Member] | NGL marketing: Forecasted purchases of NGLs and related hydrocarbon products [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4] | 100.0 | 100.0 |
Long Term Volume | [3],[4] | 1.5 | 1.5 |
Designated as Hedging Instrument [Member] | NGL marketing: Forecasted sales of NGLs and related hydrocarbon products [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4] | 121.7 | 121.7 |
Long Term Volume | [3],[4] | 1.2 | 1.2 |
Designated as Hedging Instrument [Member] | NGL marketing: NGLs inventory management activities [Member] | Derivatives in fair value hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4] | 0.3 | 0.3 |
Designated as Hedging Instrument [Member] | Refined products marketing: Forecasted purchases of refined products [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4] | 0.9 | 0.9 |
Designated as Hedging Instrument [Member] | Refined products marketing: Forecasted sales of refined products [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4] | 0.9 | 0.9 |
Designated as Hedging Instrument [Member] | Crude oil marketing: Forecasted purchases of crude oil [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4] | 10.4 | 10.4 |
Designated as Hedging Instrument [Member] | Crude oil marketing: Forecasted sales of crude oil [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4] | 13.8 | 13.8 |
Designated as Hedging Instrument [Member] | Propylene marketing: Forecasted sales of NGLs for propylene marketing activities [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4] | 0.3 | 0.3 |
Not Designated as Hedging Instrument [Member] | Natural gas risk management activities [Member] | Derivatives in mark-to-market relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | Bcf | [3],[4],[5] | 38.2 | 38.2 |
Long Term Volume | Bcf | [3],[4],[5] | 0.6 | 0.6 |
Not Designated as Hedging Instrument [Member] | Refined products risk management activities [Member] | Derivatives in mark-to-market relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4],[5] | 7.6 | 7.6 |
Not Designated as Hedging Instrument [Member] | NGL risk management activities [Member] | Derivatives in mark-to-market relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4],[5] | 2.4 | 2.4 |
Not Designated as Hedging Instrument [Member] | Crude oil risk management activities [Member] | Derivatives in mark-to-market relationships [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Current Volume | [3],[4],[5] | 22.2 | 22.2 |
Long Term Volume | [3],[4],[5] | 6.1 | 6.1 |
[1] | These swaps were entered into in May 2019.
[2] | These swaps were entered into in September 2019 as a result of the swaption exercise.
[3] | The maximum term for derivatives designated as cash flow hedges, derivatives designated as fair value hedges and derivatives not designated as hedging instruments is January 2021, December 2019 and December 2022, respectively.
[4] | Volume for derivatives designated as hedging instruments reflects the total amount of volumes hedged whereas volume for derivatives not designated as hedging instruments reflects the absolute value of derivative notional volumes.
[5] | Reflects the use of derivative instruments to manage risks associated with transportation, processing and storage assets.

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