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Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Components of gain (loss) on derivatives, net

Current period settlements on derivative contracts and Loss on derivatives, net were as follows:

	Year Ended December 31,
	2017				2016				2015
	(in millions)
Current period settlement on derivative contracts	$	(16.6	)		$	36.4			$	(26.0	)
Loss on derivatives, net	(69.8		)		(19.4		)		(28.6		)

Schedule of offsetting liabilities

The offsetting assets and liabilities for the Refining Partnership's derivatives as of December 31, 2017 and 2016 are recorded as current assets and current liabilities in prepaid expenses and other current assets and accrued expenses and other current liabilities, respectively, in the Consolidated Balance Sheets as follows:

	As of December 31, 2017
Description	Gross  Current Assets				Gross Amounts Offset				Net Current Assets  Presented				Cash Collateral  Not Offset				Net Amount
	(in millions)
Commodity Swaps	$	7.0			$	(7.0	)		$	—			$	—			$	—
Total	$	7.0			$	(7.0	)		$	—			$	—			$	—

	As of December 31, 2017
Description	Gross  Current Liabilities				Gross Amounts Offset				Net Current Liabilities  Presented				Cash Collateral  Not Offset				Net Amount
	(in millions)
Commodity Swaps	$	71.3			$	(7.0	)		$	64.3			$	—			$	64.3
Total	$	71.3			$	(7.0	)		$	64.3			$	—			$	64.3

	As of December 31, 2016
Description	Gross  Current Liabilities				Gross Amounts Offset				Net Current Liabilities  Presented				Cash Collateral  Not Offset				Net Amount
	(in millions)
Commodity Swaps	$	11.1			$	—			$	11.1			$	—			$	11.1
Total	$	11.1			$	—			$	11.1			$	—			$	11.1

Schedule of offsetting assets

The offsetting assets and liabilities for the Refining Partnership's derivatives as of December 31, 2017 and 2016 are recorded as current assets and current liabilities in prepaid expenses and other current assets and accrued expenses and other current liabilities, respectively, in the Consolidated Balance Sheets as follows:

	As of December 31, 2017
Description	Gross  Current Assets				Gross Amounts Offset				Net Current Assets  Presented				Cash Collateral  Not Offset				Net Amount
	(in millions)
Commodity Swaps	$	7.0			$	(7.0	)		$	—			$	—			$	—
Total	$	7.0			$	(7.0	)		$	—			$	—			$	—

	As of December 31, 2017
Description	Gross  Current Liabilities				Gross Amounts Offset				Net Current Liabilities  Presented				Cash Collateral  Not Offset				Net Amount
	(in millions)
Commodity Swaps	$	71.3			$	(7.0	)		$	64.3			$	—			$	64.3
Total	$	71.3			$	(7.0	)		$	64.3			$	—			$	64.3

	As of December 31, 2016
Description	Gross  Current Liabilities				Gross Amounts Offset				Net Current Liabilities  Presented				Cash Collateral  Not Offset				Net Amount
	(in millions)
Commodity Swaps	$	11.1			$	—			$	11.1			$	—			$	11.1
Total	$	11.1			$	—			$	11.1			$	—			$	11.1

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Tabular disclosure of derivative and other financial assets that are subject to offsetting, including master netting arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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Tabular disclosure of derivative and other financial liabilities that are subject to offsetting, including master netting arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225877-175312

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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