Revenue (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Aug. 13, 2021	Dec. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer, Including Assessed Tax			$ 4,134,805	$ 3,734,132	$ 3,222,391
Revenues			4,221,162	3,805,661	3,326,450
Other			50,069	66,620	26,121
Total Other Revenue			86,357	71,529	104,059
Electric			2,961,457	2,671,623	2,319,416
Natural gas			1,209,636	1,067,418	980,913
Other			50,069	66,620	26,121
Residential
Revenue from Contract with Customer, Including Assessed Tax			2,190,234	2,040,329	1,848,515
Industrial
Revenue from Contract with Customer, Including Assessed Tax			141,808	130,008	120,159
Other Retail Customer
Revenue from Contract with Customer, Including Assessed Tax			18,759	19,226	31,871
Wholesale
Revenue from Contract with Customer, Including Assessed Tax			319,380	161,152	66,345
Transmission and Transportation
Revenue from Contract with Customer, Including Assessed Tax			67,359	63,783	57,628
Miscellaneous Customer
Revenue from Contract with Customer, Including Assessed Tax			63,852	124,431	54,235
Commercial
Revenue from Contract with Customer, Including Assessed Tax			1,333,413	1,195,203	1,043,638
Puget LNG [Member]
Revenue, Remaining Performance Obligation, Amount			195,566
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction			15,359
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, 2025			19,710
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, 2026			19,454
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, 2027			19,454
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, 2028			19,454
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Thereafter			102,135
Remaining Contract Term, PLNG		10 years
Subsidiaries [Member]
Nonutility Expense	$ 12,900
Revenue Not from Contract with Customer	23,200
Other	$ 23,200		45,080	66,620	26,121
Electric			2,961,457	2,671,623	2,319,416
Natural gas			1,209,636	1,067,418	980,913
Electricity, US Regulated [Member]
Revenue from Contract with Customer, Including Assessed Tax			2,877,971	2,601,208	2,235,546
Total Other Revenue			83,486	70,415	83,870
Electricity, US Regulated [Member] | Residential
Revenue from Contract with Customer, Including Assessed Tax			1,381,858	1,318,326	1,186,012
Electricity, US Regulated [Member] | Industrial
Revenue from Contract with Customer, Including Assessed Tax			116,712	108,267	101,567
Electricity, US Regulated [Member] | Other Retail Customer
Revenue from Contract with Customer, Including Assessed Tax			18,759	18,834	26,644
Electricity, US Regulated [Member] | Wholesale
Revenue from Contract with Customer, Including Assessed Tax			319,380	161,152	66,345
Electricity, US Regulated [Member] | Transmission and Transportation
Revenue from Contract with Customer, Including Assessed Tax			47,027	43,753	38,073
Electricity, US Regulated [Member] | Miscellaneous Customer
Revenue from Contract with Customer, Including Assessed Tax			13,065	47,948	25,007
Electricity, US Regulated [Member] | Commercial
Revenue from Contract with Customer, Including Assessed Tax			981,170	902,928	791,898
Other Revenue From Contracts with Customers [Member]
Revenue from Contract with Customer, Including Assessed Tax			50,069	66,620	26,121
Total Other Revenue			0	0	0
Other Revenue From Contracts with Customers [Member] | Residential
Revenue from Contract with Customer, Including Assessed Tax			0	0	0
Other Revenue From Contracts with Customers [Member] | Industrial
Revenue from Contract with Customer, Including Assessed Tax			0	0	0
Other Revenue From Contracts with Customers [Member] | Other Retail Customer
Revenue from Contract with Customer, Including Assessed Tax			0	0	0
Other Revenue From Contracts with Customers [Member] | Wholesale
Revenue from Contract with Customer, Including Assessed Tax			0	0	0
Other Revenue From Contracts with Customers [Member] | Transmission and Transportation
Revenue from Contract with Customer, Including Assessed Tax			0	0	0
Other Revenue From Contracts with Customers [Member] | Miscellaneous Customer
Revenue from Contract with Customer, Including Assessed Tax			50,069	66,620	26,121
Other Revenue From Contracts with Customers [Member] | Commercial
Revenue from Contract with Customer, Including Assessed Tax			0	0	0
Other Revenue From Contracts with Customers [Member] | Puget LNG [Member] | Miscellaneous Customer
Revenue from Contract with Customer, Including Assessed Tax			5,000
Natural Gas, US Regulated [Member]
Revenue from Contract with Customer, Including Assessed Tax			1,206,765	1,066,304	960,724
Total Other Revenue			2,871	1,114	20,189
Natural Gas, US Regulated [Member] | Residential
Revenue from Contract with Customer, Including Assessed Tax			808,376	722,003	662,503
Natural Gas, US Regulated [Member] | Industrial
Revenue from Contract with Customer, Including Assessed Tax			25,096	21,741	18,592
Natural Gas, US Regulated [Member] | Other Retail Customer
Revenue from Contract with Customer, Including Assessed Tax			0	392	5,227
Natural Gas, US Regulated [Member] | Wholesale
Revenue from Contract with Customer, Including Assessed Tax			0	0	0
Natural Gas, US Regulated [Member] | Transmission and Transportation
Revenue from Contract with Customer, Including Assessed Tax			20,332	20,030	19,555
Natural Gas, US Regulated [Member] | Miscellaneous Customer
Revenue from Contract with Customer, Including Assessed Tax			718	9,863	3,107
Natural Gas, US Regulated [Member] | Commercial
Revenue from Contract with Customer, Including Assessed Tax			$ 352,243	$ 292,275	$ 251,740