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Financing: Summary of ATM Activity (Details) - Common Stock - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Number of shares issued	1,307,755	1,812,197	0
Average price per share	$ 69.74	$ 66.18	$ 0
Proceeds, (net of issuance costs)	$ 90.3	$ 118.8	$ 0.0

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