Financing: Equity (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Payments of Stock Issuance Costs	$ 0.2	$ 0.4	$ 0.2	$ 0.4
Common Stock
At The Market Equity Offering Program Shares Issued	0.2	0.6	0.3	0.6
At The Market Equity Program - Net Proceeds from Sale of Stock	$ 16.0	$ 40.0	$ 20.0	$ 40.0

The cash outflow for cost incurred directly with the issuance of an equity security.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

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