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v3.19.1

Derivative Instruments, Hedging Activities and Fair Value Measurements, Level 3 Recurring Valuation Techniques (Details) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 USD ($) $ / gal $ / bbl | Dec. 31, 2018 USD ($)
Asset commodity derivatives - Crude oil [Member] | Liability commodity derivatives - Crude oil [Member] | Level 3 [Member] | Measurement Input, Commodity Forward Price [Member] | Minimum [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Fair value inputs, forward commodity price (in dollars per unit) | $ / bbl | 59.44 |
Asset commodity derivatives - Crude oil [Member] | Liability commodity derivatives - Crude oil [Member] | Level 3 [Member] | Measurement Input, Commodity Forward Price [Member] | Maximum [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Fair value inputs, forward commodity price (in dollars per unit) | $ / bbl | 66.48 |
Asset commodity derivatives - Propane [Member] | Liability commodity derivatives - Propane [Member] | Level 3 [Member] | Measurement Input, Commodity Forward Price [Member] | Minimum [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Fair value inputs, forward commodity price (in dollars per unit) | $ / gal | 0.62 |
Asset commodity derivatives - Propane [Member] | Liability commodity derivatives - Propane [Member] | Level 3 [Member] | Measurement Input, Commodity Forward Price [Member] | Maximum [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Fair value inputs, forward commodity price (in dollars per unit) | $ / gal | 0.69 |
Asset commodity derivatives - Natural gasoline [Member] | Liability commodity derivatives - Natural gasoline [Member] | Level 3 [Member] | Measurement Input, Commodity Forward Price [Member] | Minimum [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Fair value inputs, forward commodity price (in dollars per unit) | $ / gal | 1.18 |
Asset commodity derivatives - Natural gasoline [Member] | Liability commodity derivatives - Natural gasoline [Member] | Level 3 [Member] | Measurement Input, Commodity Forward Price [Member] | Maximum [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Fair value inputs, forward commodity price (in dollars per unit) | $ / gal | 1.24 |
Asset Commodity derivatives - Ethane [Member] | Liability Commodity Derivatives - Ethane [Member] | Level 3 [Member] | Measurement Input, Commodity Forward Price [Member] | Minimum [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Fair value inputs, forward commodity price (in dollars per unit) | $ / gal | 0.23 |
Asset Commodity derivatives - Ethane [Member] | Liability Commodity Derivatives - Ethane [Member] | Level 3 [Member] | Measurement Input, Commodity Forward Price [Member] | Maximum [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Fair value inputs, forward commodity price (in dollars per unit) | $ / gal | 0.26 |
Asset commodity derivatives - Normal butane [Member] | Liability commodity derivatives - Normal butane [Member] | Level 3 [Member] | Measurement Input, Commodity Forward Price [Member] | Minimum [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Fair value inputs, forward commodity price (in dollars per unit) | $ / gal | 0.71 |
Asset commodity derivatives - Normal butane [Member] | Liability commodity derivatives - Normal butane [Member] | Level 3 [Member] | Measurement Input, Commodity Forward Price [Member] | Maximum [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Fair value inputs, forward commodity price (in dollars per unit) | $ / gal | 0.80 |
Fair Value, Measurements, Recurring [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Commodity asset derivatives | $ 138.4 | $ 161.9
Commodity liability derivatives | 108.4 | 162.4
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Commodity asset derivatives | 3.9 | 1.3
Commodity liability derivatives | 3.0 | $ 7.2
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Commodity asset derivatives | 3.9 |
Commodity liability derivatives | 3.0 |
Fair Value, Measurements, Recurring [Member] | Liability commodity derivatives - Crude oil [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Commodity liability derivatives | 0.1 |
Fair Value, Measurements, Recurring [Member] | Liability commodity derivatives - Propane [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Commodity liability derivatives | 0.8 |
Fair Value, Measurements, Recurring [Member] | Liability commodity derivatives - Natural gasoline [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Commodity liability derivatives | 0.5 |
Fair Value, Measurements, Recurring [Member] | Liability Commodity Derivatives - Ethane [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Commodity liability derivatives | 1.3 |
Fair Value, Measurements, Recurring [Member] | Liability commodity derivatives - Normal butane [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Commodity liability derivatives | 0.3 |
Fair Value, Measurements, Recurring [Member] | Asset commodity derivatives - Crude oil [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Commodity asset derivatives | 3.2 |
Fair Value, Measurements, Recurring [Member] | Asset commodity derivatives - Propane [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Commodity asset derivatives | 0.0 |
Fair Value, Measurements, Recurring [Member] | Asset commodity derivatives - Natural gasoline [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Commodity asset derivatives | 0.0 |
Fair Value, Measurements, Recurring [Member] | Asset Commodity derivatives - Ethane [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Commodity asset derivatives | 0.7 |
Fair Value, Measurements, Recurring [Member] | Asset commodity derivatives - Normal butane [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] |  |
Fair Value Measurements, Recurring, Valuation Techniques [Line Items] |  |
Commodity asset derivatives | $ 0.0 |

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