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Other Long-term Liabilities (Tables)

12 Months Ended

Dec. 31, 2020

Other Liabilities Noncurrent [Abstract]

Schedule of Other Long-term Liabilities

Other long-term liabilities are comprised of the following obligations:

		December 31, 2020				December 31, 2019
Deferred revenue		$	168.5			$	172.0
Asset retirement obligations			68.3				66.3
Operating lease liabilities			46.2				47.2
Other liabilities			26.1				20.1
Total long-term liabilities		$	309.1			$	305.6

Changes in Aggregate Asset Retirement Obligations

The changes in our ARO are as follows:

		2020				2019
Beginning of period		$	66.3			$	55.5
Additions (1)			—				11.8
Change in cash flow estimate			(1.8	)			(5.1	)
Accretion expense			3.6				4.7
Retirement of ARO			0.2				(0.6	)
End of period		$	68.3			$	66.3

(1) Amount reflects additions of ARO related to the commencement of operations of Grand Prix.

Components of deferred revenue

The following table shows the components of deferred revenue:

		December 31, 2020				December 31, 2019
Splitter agreement		$	129.0			$	129.0
Gas contract amendment			37.3				39.8
Other deferred revenue			2.2				3.2
Total deferred revenue		$	168.5			$	172.0

Changes in Deferred revenue

The following table shows the changes in deferred revenue:

		2020				2019
Balance at beginning of period		$	172.0			$	175.5
Additions			0.3				0.4
Revenue recognized			(3.8	)			(3.9	)
Balance at end of period		$	168.5			$	172.0

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