Risk Management and Derivatives: Utilities (Details) $ in Millions		6 Months Ended	12 Months Ended
		Jun. 30, 2023 USD ($) MMBTU	Dec. 31, 2022 MMBTU
Derivative [Line Items]
Credit Risk Derivative Liabilities, at Fair Value | $		$ 0.6
Natural Gas, Distribution | Cash Flow Hedging
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount		3,151,300
Natural Gas, Distribution | Natural gas futures purchased
Derivative [Line Items]
Derivative, Remaining Maturity	[1]	8 months	3 months
Natural Gas, Distribution | Natural gas futures purchased | Long
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount		80,000	630,000
Natural Gas, Distribution | Natural gas options purchased, net
Derivative [Line Items]
Derivative, Remaining Maturity	[1]	9 months	3 months
Natural Gas, Distribution | Natural gas options purchased, net | Long
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount		120,000	1,790,000
Natural Gas, Distribution | Natural gas basis swaps purchased
Derivative [Line Items]
Derivative, Remaining Maturity	[1]	8 months	3 months
Natural Gas, Distribution | Natural gas basis swaps purchased | Long
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount		80,000	900,000
Natural Gas, Distribution | Natural gas over-the-counter swaps, net
Derivative [Line Items]
Derivative, Remaining Maturity	[1],[2]	27 months	24 months
Natural Gas, Distribution | Natural gas over-the-counter swaps, net | Long
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	[2]	6,580,000	4,460,000
Natural Gas, Distribution | Natural gas physical contracts, net
Derivative [Line Items]
Derivative, Remaining Maturity	[1],[3]	9 months	12 months
Natural Gas, Distribution | Natural gas physical contracts, net | Long
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	[3]	1,813,165	17,864,412

[1] Term reflects the maximum forward period hedged.

[2] As of June 30, 2023, 3,151,300 MMBtus of natural gas over-the-counter swaps purchases were designated as cash flow hedges.

[3] Volumes exclude derivative contracts that qualify for the normal purchases and normal sales exception permitted by GAAP.