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Schedule of Change in Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2021

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation [Table Text Block]

A reconciliation of our AROs is as follows:

(in millions)			June 30, 2021						December 31, 2020
AROs, beginning of period			$	1,393.9					$	1,315.2
Liabilities incurred			9.5						10.8
Liabilities settled			(78.7)						(125.1)
Accretion expense			35.1						68.0
Revisions in estimated cash flows			50.4						167.3
Foreign currency translation			9.2						(42.3)
AROs, end of period			1,419.4						1,393.9
Less current portion			174.8						190.2
Non-current portion of AROs			$	1,244.6					$	1,203.7

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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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