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Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2019

Asset Retirement Obligation Disclosure [Abstract]

Reconciliations of the Company's ARO liability

Reconciliations of the Company’s asset retirement obligations are as follows:

	December 31,
	2019				2018
	(Dollars in millions)
Balance at beginning of period	$	750.2			$	691.1
Liabilities incurred or acquired	—				16.3
Liabilities settled or disposed	(47.7		)		(57.8		)
Accretion expense	54.1				48.5
Revisions to estimates	(4.3		)		52.1
Balance at end of period	$	752.3			$	750.2
Less: Current portion (included in “Accounts payable and accrued expenses”)	98.2				63.8
Noncurrent obligation (included in “Asset retirement obligations”)	$	654.1			$	686.4
Balance at end of period — active locations	$	525.4			$	671.8
Balance at end of period — closed or inactive locations	$	226.9			$	78.4

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- References

No definition available.

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- Definition

Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859

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