Litigation (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Potential liabilities related to litigation and environmental matters	$ 41.5	$ 29.1
Loss Contingency, Receivable	17.5	16.2
Loss Contingency, Regulated	$ 21.3	$ 10.5

Amount of receivable related to a loss contingency accrual. For example, an insurance recovery receivable.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12053-110248

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