Summary of Significant Accounting Policies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) mi² segment MW	Dec. 31, 2024 USD ($) MW	Dec. 31, 2023 USD ($)	Dec. 31, 2026 USD ($)	Jan. 01, 2026 USD ($)	Jan. 01, 2025 USD ($)	Dec. 31, 2017 USD ($)
Accounting Policies
Allowance for doubtful accounts	$ 26,452	$ 40,436
Bad Debt Deferral, COVID 19	21,400	37,100
Excise and Sales Taxes	384,700	329,900	$ 319,100
Related Party Transaction, Amounts of Transaction	$ 0	0	0
Number of operating segments \| segment	1
Unrealized gain on derivative instruments	$ 37,448	32,591
Derivative Asset	48,700
Derivative Liability	573,400
Unrealized loss on derivative instruments	0	$ 33,911	$ (284,495)
Unrealized Gain (Loss) on Derivatives Deferred	$ 524,700
Common Plant
Accounting Policies
Annual depreciation provision	6.70%	6.60%	6.50%
Electric
Accounting Policies
Annual depreciation provision	3.60%	3.40%	3.40%
Natural Gas
Accounting Policies
Annual depreciation provision	3.20%	3.20%	3.20%
Puget Sound Energy
Accounting Policies
Area of service territory (sqmi) \| mi²	6,000
Allowance for doubtful accounts	$ 26,452	$ 40,436
Public Utilities, Rate Case, Deferred Storm Costs Threshold	$ 9,400					$ 9,400	$ 10,000
Regulatory Asset, Amortization Period	1 year
Regulatory Liability, Amortization Period	1 year
Public Utilities, Rate Case, Deferred Storm Qualifying Costs							$ 500
Unrealized gain on derivative instruments	$ 37,448	32,591
Unrealized loss on derivative instruments	0	33,911	$ (284,495)
Variable Interest Entity [Line Items]
Variable Interest Entity, Payable	14,500	11,600
Variable Interest Entity, Measure of Activity, Purchases	$ 91,600	$ 88,900	$ 86,000
Variable Interest Entity, Measure of Activity, Contracted Capacity \| MW	813.8	723.8
Puget Sound Energy \| Forecast
Accounting Policies
Public Utilities, Rate Case, Deferred Storm Costs Threshold				$ 9,600	$ 9,600
Puget Sound Energy \| Decoupling Mechanism [Member] \| Electric \| Maximum
Accounting Policies
Public Utilities, Approved Rate Increase (Decrease), Percentage	3.00%
Puget Sound Energy \| Decoupling Mechanism [Member] \| Natural Gas \| Maximum
Accounting Policies
Public Utilities, Approved Rate Increase (Decrease), Percentage	5.00%
Puget LNG operating revenue
Accounting Policies
Jointly Owned Non-Utility Plant Share	57.00%
Tacoma LNG
Accounting Policies
Jointly Owned Non-Utility Plant Share	43.00%

PUGET ENERGY INC /WA 10-K