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v3.20.2

Derivative Instruments, Hedging Activities and Fair Value Measurements (Details) bbl in Millions, $ in Millions | 1 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jan. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) TWh Contract bbl Bcf | Jun. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Derivative [Line Items] |  |  |  |  |
Payments for the settlement of interest rate derivative instruments | $ |  |  | $ (33.3) | $ 0.0 |
Carrying amount of hedged asset | $ |  |  | 233.8 |  | $ 31.7
Forward Starting Swaps [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional Amount | $ |  |  | $ 1,080.0 |  |
Weighted-Average Rate Locked |  |  | 1.83% |  |
Life of associated future debt |  |  | 30 years |  |
Notional amount of settled derivative instruments | $ |  | $ 575.0 |  |  |
Payments for the settlement of interest rate derivative instruments | $ |  | $ (33.3) |  |  |
Forward Starting Swaps B [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Number of Derivatives Outstanding | Contract |  |  | 1 |  |
Notional Amount | $ |  |  | $ 75.0 |  |
Weighted-Average Rate Locked |  |  | 2.41% |  |
Forward Starting Swaps D [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Number of Derivatives Outstanding | Contract |  |  | 5 |  |
Notional Amount | $ |  |  | $ 500.0 |  |
Weighted-Average Rate Locked |  |  | 2.13% |  |
Forward Starting Swaps - January 2020 [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Number of Derivatives Outstanding | Contract | [1] |  | 2 |  |
Notional Amount | $ |  |  | $ 150.0 |  |
Weighted-Average Rate Locked |  |  | 1.72% |  |
Forward Starting Swaps - February 2020 (A) [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Number of Derivatives Outstanding | Contract | [1] |  | 1 |  |
Notional Amount | $ |  |  | $ 100.0 |  |
Weighted-Average Rate Locked |  |  | 1.46% |  |
Forward Starting Swaps - February 2020 (B) [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Number of Derivatives Outstanding | Contract | [1] |  | 2 |  |
Notional Amount | $ |  |  | $ 150.0 |  |
Weighted-Average Rate Locked |  |  | 1.48% |  |
Forward Starting Swaps - March 2020 [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Number of Derivatives Outstanding | Contract | [1] |  | 2 |  |
Notional Amount | $ |  |  | $ 100.0 |  |
Weighted-Average Rate Locked |  |  | 0.95% |  |
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 | [2],[3] |  | 12.7 |  |
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 | [2],[3] |  | 0.1 |  |
Designated as Hedging Instrument [Member] | Octane enhancement: Forecasted purchases of NGLs [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Current Volume | [2],[3] |  | 0.6 |  |
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 | [2],[3] |  | 8.9 |  |
Designated as Hedging Instrument [Member] | Natural gas marketing: Forecasted purchases of natural gas [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Current Volume | Bcf | [2],[3] |  | 1.8 |  |
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 | [2],[3] |  | 5.9 |  |
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 | [2],[3] |  | 157.9 |  |
Long Term Volume | [2],[3] |  | 4.6 |  |
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 | [2],[3] |  | 162.4 |  |
Long Term Volume | [2],[3] |  | 15.6 |  |
Designated as Hedging Instrument [Member] | NGL marketing: NGLs inventory management activities [Member] | Derivatives in fair value hedging relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Current Volume | [2],[3] |  | 1.8 |  |
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 | [2],[3] |  | 46.8 |  |
Long Term Volume | [2],[3] |  | 15.4 |  |
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 | [2],[3] |  | 52.5 |  |
Long Term Volume | [2],[3] |  | 18.7 |  |
Designated as Hedging Instrument [Member] | Refined products marketing: Refined products inventory management activities [Member] | Derivatives in fair value hedging relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Current Volume | [2],[3] |  | 3.9 |  |
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 | [2],[3] |  | 78.2 |  |
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 | [2],[3] |  | 88.7 |  |
Designated as Hedging Instrument [Member] | Petrochemical marketing: Forecasted sales of petrochemical products [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Current Volume | [2],[3] |  | 1.2 |  |
Designated as Hedging Instrument [Member] | Commercial energy: Forecasted purchases of power related to asset operations [Member] | Derivatives in cash flow hedging relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Current Volume | TWh | [2],[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 | [2],[3],[4],[5] |  | 44.2 |  |
Long Term Volume | Bcf | [2],[3],[5] |  | 2.1 |  |
Current natural gas hedging volumes designated as an index plus or minus a discount | Bcf |  |  | 0.7 |  |
Not Designated as Hedging Instrument [Member] | Refined products risk management activities [Member] | Derivatives in mark-to-market relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Current Volume | [2],[3],[5] |  | 4.0 |  |
Not Designated as Hedging Instrument [Member] | NGL risk management activities [Member] | Derivatives in mark-to-market relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Current Volume | [2],[3],[5] |  | 21.4 |  |
Long Term Volume | [2],[3],[5] |  | 8.4 |  |
Not Designated as Hedging Instrument [Member] | Crude oil risk management activities [Member] | Derivatives in mark-to-market relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Current Volume | [2],[3],[5] |  | 28.8 |  |
Long Term Volume | [2],[3],[5] |  | 7.7 |  |
Not Designated as Hedging Instrument [Member] | Commercial energy risk management activities [Member] | Derivatives in mark-to-market relationships [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Current Volume | [2],[3],[5] |  | 0.1 |  |
[1] | These swaps were entered into during the first quarter of 2020.
[2] | The maximum term for derivatives designated as cash flow hedges, derivatives designated as fair value hedges and derivatives not designated as hedging instruments is December 2022, March 2021 and December 2022, respectively.
[3] | 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.
[4] | Current volumes include approximately 0.7 Bcf of physical derivatives instruments that are predominantly priced as index plus a premium or minus a discount.
[5] | Reflects the use of derivative instruments to manage risks associated with our transportation, processing, storage assets and end use power requirements.

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