Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2023

Public Utilities, Property, Plant and Equipment [Abstract]

Major Classifications Of Property, Plant And Equipment And Accumulated Depreciation [Text Block]

The following table sets forth the major classifications of property, plant, and equipment and accumulated depreciation of continuing operations at December 31:

In thousands	2023		2022
NW Natural:
NGD plant in service	$	4,206,455	$	3,992,676
NGD construction work in progress	105,166		78,897
Less: Accumulated depreciation	1,159,367		1,115,690
NGD plant, net	3,152,254		2,955,883
Other plant in service	71,175		70,368
Other construction work in progress	10,963		6,606
Less: Accumulated depreciation	22,595		21,541
Other plant, net	59,543		55,433
Total property, plant, and equipment	$	3,211,797	$	3,011,316
Other (NW Holdings):
Other plant in service	$	147,040	$	92,979
Other construction work in progress	15,810		20,040
Less: Accumulated depreciation	16,593		9,935
Other plant, net	146,257		103,084
NW Holdings:
Total property, plant, and equipment	$	3,358,054	$	3,114,400
NW Natural:
Capital expenditures in accrued liabilities	$	24,168	$	24,584
NW Holdings:
Capital expenditures in accrued liabilities	$	27,879	$	25,318