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v3.20.1

Derivative Instruments, Hedging Activities and Fair Value Measurements, Recurring Fair Value Measurements (Details) - USD ($) $ in Millions | Mar. 31, 2020 | Mar. 05, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Financial liabilities [Abstract] |  |  |
Liquidity Option |  | $ 511.9 |
Fair Value, Measurements, Recurring [Member] |  |  |
Financial assets [Abstract] |  |  |
Value before application of CME Rule 814 | $ 1,716.9 |  | $ 397.2
Impact of CME Rule 814 | (1,346.0) |  | (269.4)
Total commodity derivatives | 370.9 |  | 127.8
Total | 370.9 |  | 127.8
Financial liabilities [Abstract] |  |  |
Liquidity Option |  |  | 509.6
Interest rate derivatives | 258.3 |  | 13.5
Commodity derivatives: |  |  |
Value before application of CME Rule 814 | 1,449.3 |  | 362.0
Impact of CME Rule 814 | (1,177.1) |  | (245.8)
Total commodity derivatives | 272.2 |  | 116.2
Total | 530.5 |  | 639.3
Net value before application of CME Rule 814 to commodity hedging portfolio | 267.6 |  |
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] |  |  |
Financial assets [Abstract] |  |  |
Value before application of CME Rule 814 | 764.5 |  | 53.4
Impact of CME Rule 814 | (723.9) |  | (47.0)
Total commodity derivatives | 40.6 |  | 6.4
Total | 40.6 |  | 6.4
Financial liabilities [Abstract] |  |  |
Liquidity Option |  |  | 0.0
Interest rate derivatives | 0.0 |  | 0.0
Commodity derivatives: |  |  |
Value before application of CME Rule 814 | 531.1 |  | 88.1
Impact of CME Rule 814 | (490.9) |  | (81.9)
Total commodity derivatives | 40.2 |  | 6.2
Total | 40.2 |  | 6.2
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] |  |  |
Financial assets [Abstract] |  |  |
Value before application of CME Rule 814 | 938.1 |  | 343.7
Impact of CME Rule 814 | (609.7) |  | (222.4)
Total commodity derivatives | 328.4 |  | 121.3
Total | 328.4 |  | 121.3
Financial liabilities [Abstract] |  |  |
Liquidity Option |  |  | 0.0
Interest rate derivatives | 258.3 |  | 13.5
Commodity derivatives: |  |  |
Value before application of CME Rule 814 | 912.9 |  | 273.6
Impact of CME Rule 814 | (685.5) |  | (163.9)
Total commodity derivatives | 227.4 |  | 109.7
Total | 485.7 |  | 123.2
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] |  |  |
Financial assets [Abstract] |  |  |
Value before application of CME Rule 814 | 14.3 |  | 0.1
Impact of CME Rule 814 | (12.4) |  | 0.0
Total commodity derivatives | 1.9 |  | 0.1
Total | 1.9 |  | 0.1
Financial liabilities [Abstract] |  |  |
Liquidity Option |  |  | 509.6
Interest rate derivatives | 0.0 |  | 0.0
Commodity derivatives: |  |  |
Value before application of CME Rule 814 | 5.3 |  | 0.3
Impact of CME Rule 814 | (0.7) |  | 0.0
Total commodity derivatives | 4.6 |  | 0.3
Total | $ 4.6 |  | $ 509.9

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