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Environmental Obligations - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)
Environmental Remediation Obligations [Abstract]
Environmental loss contingencies, net of expected recoveries, in excess of accrual	$ 160

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- Definition

Best estimate of the reasonably possible loss exposure in excess of the amount accrued for remediation, site restoration, postclosure, monitoring commitments, or other exit costs associated with the sale, disposal or abandonment of a particular property resulting from unanticipated contamination of the assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.Y.Q4)
-URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751

+ Details

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Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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