SCHEDULE I CONDENSED FINANCIAL INFORMATION OF PUGET ENERGY Notes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Ownership percentage	100.00%
Net Income (Loss)	$ 414,345	$ 260,849	$ 182,717
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	417,003	319,854	180,429
Net Cash Provided by (Used in) Operating Activities	769,618	826,598	727,568
Net Cash Provided by (Used in) Investing Activities	(1,005,280)	(920,777)	(902,796)
Business Combination Adjustment, ASC 805	1,000	2,400	3,400
Parent Company [Member]
Net Income (Loss)	414,345	260,849	182,717
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	417,003	319,854	180,429
Net Cash Provided by (Used in) Operating Activities	(10,197)	143,691	38,280
Net Cash Provided by (Used in) Investing Activities	(62,176)	(21,783)	(31,043)
Subsidiaries [Member]
Net Income (Loss)	490,952	336,063	274,280
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	501,049	403,878	281,801
Net Cash Provided by (Used in) Operating Activities	817,461	920,393	824,810
Net Cash Provided by (Used in) Investing Activities	(1,001,377)	(906,906)	(871,097)
PSE and PLNG
Net Income (Loss)	$ 473,800	$ 335,000	$ 274,300