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Subsequent Events:	12 Months Ended
	Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS Except as described below and in Note 3, there have been no events subsequent to December 31, 2021 which would require recognition in the consolidated financial statements or disclosures. Winter Storm Uri On January 27, 2022, Kansas Gas received approval from the KCC for their Winter Storm Uri cost recovery settlement with final rates to be implemented in 2022. See Note 2 for additional information. Transmission Service Agreements On January 1, 2022, Colorado Electric entered into a firm point-to-point transmission service agreement with Tri-State Generation and Transmission Association Inc. that provides a maximum of 58 MW of capacity and associated energy. This agreement expires December 31, 2024. On January 1, 2022, South Dakota Electric entered into a firm point-to-point transmission service agreement with MEAN that provides a maximum of 20 MW of capacity and associated energy. This agreement expires December 31, 2023.

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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