Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total gross property, plant and equipment	$ 8,374,790	$ 7,856,573
Less accumulated depreciation and depletion	(1,576,842)	(1,407,397)
Property, plant and equipment of variable interest entities, net	6,797,948	6,449,176
Corporate, Non-Segment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	5,685	5,694
Construction in progress, gross	13,690	8,460
Total gross property, plant and equipment	19,375	14,154
Less accumulated depreciation and depletion	(1,773)	(1,544)
Property, plant and equipment of variable interest entities, net	$ 17,602	$ 12,610
Weighted Average | Corporate, Non-Segment
Property, Plant and Equipment [Line Items]
Weighted average useful life	11 years	10 years
Minimum | Corporate, Non-Segment
Property, Plant and Equipment [Line Items]
Weighted average useful life	4 years
Maximum | Corporate, Non-Segment
Property, Plant and Equipment [Line Items]
Weighted average useful life	24 years
Production, Gas | Weighted Average
Property, Plant and Equipment [Line Items]
Weighted average useful life	45 years	40 years
Production, Gas | Minimum
Property, Plant and Equipment [Line Items]
Weighted average useful life	24 years
Production, Gas | Maximum
Property, Plant and Equipment [Line Items]
Weighted average useful life	47 years
Gas transmission | Weighted Average
Property, Plant and Equipment [Line Items]
Weighted average useful life	58 years	58 years
Gas transmission | Minimum
Property, Plant and Equipment [Line Items]
Weighted average useful life	32 years
Gas transmission | Maximum
Property, Plant and Equipment [Line Items]
Weighted average useful life	72 years
Gas distribution | Weighted Average
Property, Plant and Equipment [Line Items]
Weighted average useful life	57 years	53 years
Gas distribution | Minimum
Property, Plant and Equipment [Line Items]
Weighted average useful life	48 years
Gas distribution | Maximum
Property, Plant and Equipment [Line Items]
Weighted average useful life	60 years
Cushion gas - depreciable | Weighted Average
Property, Plant and Equipment [Line Items]
Weighted average useful life		28 years
Gas, Storage | Weighted Average
Property, Plant and Equipment [Line Items]
Weighted average useful life	41 years	38 years
Gas, Storage | Minimum
Property, Plant and Equipment [Line Items]
Weighted average useful life	36 years
Gas, Storage | Maximum
Property, Plant and Equipment [Line Items]
Weighted average useful life	48 years
General | Weighted Average
Property, Plant and Equipment [Line Items]
Weighted average useful life	23 years	21 years
General | Minimum
Property, Plant and Equipment [Line Items]
Weighted average useful life	3 years
General | Maximum
Property, Plant and Equipment [Line Items]
Weighted average useful life	25 years
Electric Utilities
Property, Plant and Equipment [Line Items]
Total plant in service before construction work in progress	$ 4,190,734	$ 3,991,095
Construction work in progress	152,953	181,451
Property, Plant and Equipment	4,343,687	4,172,546
Less accumulated depreciation and depletion	(1,104,056)	(1,016,738)
Property, plant and equipment of variable interest entities, net	$ 3,239,631	3,155,808
Depreciation, depletion and amortization, remaining amortization period	8 years
Electric Utilities | Production, Electric
Property, Plant and Equipment [Line Items]
Production, processing and storage	$ 1,482,081	$ 1,452,055
Electric Utilities | Production, Electric | Weighted Average
Property, Plant and Equipment [Line Items]
Weighted average useful life	41 years	41 years
Electric Utilities | Production, Electric | Minimum
Property, Plant and Equipment [Line Items]
Weighted average useful life	32 years
Electric Utilities | Production, Electric | Maximum
Property, Plant and Equipment [Line Items]
Weighted average useful life	46 years
Electric Utilities | Electric transmission
Property, Plant and Equipment [Line Items]
Transmission	$ 632,872	$ 546,126
Electric Utilities | Electric transmission | Weighted Average
Property, Plant and Equipment [Line Items]
Weighted average useful life	48 years	49 years
Electric Utilities | Electric transmission | Minimum
Property, Plant and Equipment [Line Items]
Weighted average useful life	40 years
Electric Utilities | Electric transmission | Maximum
Property, Plant and Equipment [Line Items]
Weighted average useful life	51 years
Electric Utilities | Electric distribution
Property, Plant and Equipment [Line Items]
Distribution	$ 1,082,535	$ 1,000,619
Electric Utilities | Electric distribution | Weighted Average
Property, Plant and Equipment [Line Items]
Weighted average useful life	47 years	47 years
Electric Utilities | Electric distribution | Minimum
Property, Plant and Equipment [Line Items]
Weighted average useful life	45 years
Electric Utilities | Electric distribution | Maximum
Property, Plant and Equipment [Line Items]
Weighted average useful life	50 years
Electric Utilities | Integrated Generation
Property, Plant and Equipment [Line Items]
Plant acquisition adjustment	$ 713,519	$ 720,490
Electric Utilities | Integrated Generation | Weighted Average
Property, Plant and Equipment [Line Items]
Weighted average useful life	31 years	30 years
Electric Utilities | Integrated Generation | Minimum
Property, Plant and Equipment [Line Items]
Weighted average useful life	19 years
Electric Utilities | Integrated Generation | Maximum
Property, Plant and Equipment [Line Items]
Weighted average useful life	38 years
Electric Utilities | Plant acquisition adjustment
Property, Plant and Equipment [Line Items]
Plant acquisition adjustment	$ 4,870	$ 4,870
Electric Utilities | Plant acquisition adjustment | Weighted Average
Property, Plant and Equipment [Line Items]
Weighted average useful life	32 years	32 years
Electric Utilities | Plant acquisition adjustment | Minimum
Property, Plant and Equipment [Line Items]
Weighted average useful life	32 years
Electric Utilities | Plant acquisition adjustment | Maximum
Property, Plant and Equipment [Line Items]
Weighted average useful life	32 years
Electric Utilities | General
Property, Plant and Equipment [Line Items]
General	$ 274,857	$ 266,935
Electric Utilities | General | Weighted Average
Property, Plant and Equipment [Line Items]
Weighted average useful life	27 years	28 years
Electric Utilities | General | Minimum
Property, Plant and Equipment [Line Items]
Weighted average useful life	24 years
Electric Utilities | General | Maximum
Property, Plant and Equipment [Line Items]
Weighted average useful life	31 years
Gas Utilities
Property, Plant and Equipment [Line Items]
Total plant in service before construction work in progress	$ 3,959,687	$ 3,632,013
Construction in progress, gross	52,041	37,860
Total gross property, plant and equipment	4,011,728	3,669,873
Less accumulated depreciation and depletion	(471,013)	(389,115)
Property, plant and equipment of variable interest entities, net	3,540,715	3,280,758
Gas Utilities | Production, Gas
Property, Plant and Equipment [Line Items]
Production, processing and storage	17,843	14,841
Gas Utilities | Gas transmission
Property, Plant and Equipment [Line Items]
Transmission	695,345	645,550
Gas Utilities | Gas distribution
Property, Plant and Equipment [Line Items]
Distribution	2,620,174	2,394,352
Gas Utilities | Cushion gas - depreciable
Property, Plant and Equipment [Line Items]
Production, processing and storage		3,539
Gas Utilities | Cushion gas - not depreciable
Property, Plant and Equipment [Line Items]
Production, processing and storage	63,137	42,478
Gas Utilities | Gas, Storage
Property, Plant and Equipment [Line Items]
Production, processing and storage	65,781	56,289
Gas Utilities | General
Property, Plant and Equipment [Line Items]
General	$ 497,407	$ 474,964