Other Revenue (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2021
Other Revenue [Abstract]
Revenue	$ 0.2	$ 0.2
Revenue recognized		$ 0.9

The amount of regulated other operating revenues recognized during the period.

No definition available.

Name:	us-gaap_RegulatedOperatingRevenueOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration