Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

The fair value of financial assets and liabilities at December 31, 2019 and 2018, is shown in the table below:

	Fair Value Measurements
	Gross Amounts of Assets and Liabilities						Netting Adjustments(1)			Net Amounts Presented on the Consolidated Balance Sheets
	Level 1		Level 2		Level 3
	(in millions)
	December 31, 2019
Financial Assets
Fair value of derivative contracts – short-term	$	—	$	1.5	$	—	$	—		$	1.5
Fair value of derivative contracts – long-term	—		0.2		—		—			0.2
Total financial assets	$	—	$	1.7	$	—	$	—		$	1.7
Financial Liabilities
Fair value of derivative contracts – short-term	$	—	$	18.7	$	—	$	—		$	18.7
Fair value of derivative contracts – long-term	—		0.5		—		—			0.5
Total financial liabilities	$	—	$	19.2	$	—	$	—		$	19.2
	December 31, 2018
Financial Assets
Fair value of derivative contracts – short-term(2)	$	—	$	88.2	$	—	$	(0.4	)	$	87.8
Fair value of derivative contracts – long-term	—		35.4		—		—			35.4
Total financial assets	$	—	$	123.6	$	—	$	(0.4	)	$	123.2
Financial Liabilities
Fair value of derivative contracts – short-term	$	—	$	0.4	$	—	$	(0.4	)	$	—
Fair value of derivative contracts – long-term	—		0.7		—		—			0.7
Total financial liabilities	$	—	$	1.1	$	—	$	(0.4	)	$	0.7

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⁽¹⁾  The Company nets its derivative contract assets and liabilities outstanding with the same counterparty on the Consolidated Balance Sheets for the contracts that contain netting provisions. Refer to Note 7 – Derivative Contracts for more information regarding the Company's derivative contracts.

⁽²⁾ 

Includes fair value of derivative contracts classified as "Noncurrent assets held for sale" of $0.3 million as of December 31, 2018 on the Consolidated Balance Sheets related to the Haynesville Divestiture.

Fair value and related carrying amount of certain financial instruments

The following table discloses the fair value and related carrying amount of certain financial instruments not disclosed in other Notes to the Consolidated Financial Statements in this Annual Report on Form 10-K:

	Carrying Amount		Level 1 Fair Value		Carrying Amount		Level 1 Fair Value
	December 31, 2019				December 31, 2018
Financial Assets	(in millions)
Cash and cash equivalents	$	166.3	$	166.3	$	—	$	—
Financial Liabilities
Checks outstanding in excess of cash balances	$	18.3	$	18.3	$	14.6	$	14.6
Long-term debt	$	2,015.6	$	2,029.4	$	2,507.1	$	2,350.5