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Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2020

Asset Retirement Obligation Disclosure [Abstract]

Schedule of changes in asset retirement obligations

Changes in asset retirement obligations for the years ended December 31, 2020 and 2019 were as follows:

(In millions)						2020						2019
Balance at beginning of year						$	23.7					$	23.1
Accretion expense						0.9						0.9
Payments						(0.4)						(0.3)
Revisions of estimates						(0.2)						—
Balance at end of year						$	24.0					$	23.7

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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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